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1. l 6510 6215 SH SITTA s lt 8 gt N c 90T 6210 Q zi 5019 Orta TOE an gt 2 HI lt T Y J 8 5 5 pit Gear gt 8213 III 5 2 z EE MEO 55 Tete
2. 6643 3142A 00106 1 6653 3006 __ 00121 7 3215 00121 5 3020 0011 8 14 3236A 00171 2 3035A 00331 3 9 3346A 00436 16 3120 00381 6 35014 00651 18 31284 00659 1 36 9 01146 24 3136 00491 12 13 3216 00661 5 6644A 31424 00106 1 32244 00741 2 32194 ___ 00116 5 3347 01091 16 3236 00156 2 3502 01481 18 3346A 00291 16 3548 02121 21 3501A __ 00376 18 3602 0219 22 36204 __ 00696 24 36194 02361 _ 24 3621A 02381 25 6645 __ 31414 00106 1 3215 __ 00111 5 6654 _ 300 00121 7 3236 00146 2 3021A 00141 8 14 3346A 00231 16 3035A 00244 9 3403 00244 15 3036 00251 3 35014 00373 18 301A 0071 6 3620A 00633 24 14 00311 11 3137 00361 12 13 66514 3049 00111 3 10 3216 00501 5 3130 00171 11 3236 00561 2 320A 00211 5 3348 00901 16 3241 _ 00231 2 3502 01191 18 33494 00281 16 3548
3. 4 Oo CI C Figure 6 4 Front Panel Board Assembly Diagram sheet 1 of 2 59 50 1 25 50 R27 2650 R29 R28 042 22 1 4 6 lt 4 64K lt 4 64 lt 4 64 509 R37 02 HIC 1 HIC2 HIC 100 wi cts 52 512 51 24711 5 1 2 LLC 5 047 3 509 4 HIC2 04 50 s LL RPG SHIELD voc B 59 23 11 aco 4 Fal See EO MTG 50 155 8 45 1 Paps 5 2 HIO C7
4. 2 DC Voltmeter 3 RMS Voltmeter 4 Oscilloscope 5 Electronic Load 6 Current Monitoring Shunt Report No Date Customer Tested By Model Ambient Temperature Serial No Relative Humidity Options Nominal Line Frequency Hz Firmware Revision Special Notes Test Equipment Used Description Model No Trace No Cal Due Date 1 AC Source Verification 19 Table 2 5 Performance Test Record for Agilent Model 6541 6641 MODEL Agilent Report No Date Test Description Minimum Results Maximum Spec 5 Spec Constant Voltage Tests Voltage Programming and Readback Low Voltage 0 V 5 mV mV 5 mV Front Panel Display Readback Vou 6 mV mV Vou 6 mV High Voltage 8 V Vout 7 9902 V V 8 0098 V Front Panel Display Readback Vout 11 6 mV Vout 11 6 mV Load Effect Vou 1 mV mV Vou 1 mV Source Effect Vou 0 5 mV mV Vou 0 5 mV PARD Ripple and Noise Peak to Peak mV 3 mV RMS uV 300 uV Transient Response Time 0 20 mV at 100 us Constant Current Tests Current Programming and Readback Low Current 0 A I 26 mA mA 26 mA Front Panel Display Readback Tour 18 mA mA 18 mA High
5. 81 Introd tion 81 T O INTERFACE SIGNALS Rune nee e depu 81 Overall Block Diagram Figure nene ciet ne M C 7 83 Detailed Block Diagram Discussion x rtr rien rc Ri e perdet te ip deed ee ideae dent 83 Secondary Interface Circuits Figure 4 3 2 4 44 1 10000000 83 Output Power and Control Circuits Figure 4 4 ene 86 POWEL 86 86 Front Panel Board Circuits Figure 4 5 89 A2 GPIB Board Circuits For Agilent Models 664 and 665xA nene 90 Isolator Board Circuits for Agilent Models 654xA and 665xA Only Figure 4 7 sese 91 Replac able Parts P soson 95 I _ 95 95 Model Applicabil
6. CV C804 J803 2 BIAS 5000 25 1803 1 CR803 PHONE CONNECTOR PIN DESIGNATIONS 5 8 1 4 4 642 Figure 6 8 A2 Isolator Board Assembly and Schematic Diagram for 654xA amp 655xA Models Only INPUT TERMINALS AC POWER TERMINALS 9 7 5 3 4 17 19 2123 25 27 29 31 L L L 18 2022 24 26 28 30 AC BIAS TERMINALS A2P101 ON GPIB BOARD J600 A1 MAIN BOARD TRANSFORMER T1 SECONDARY AC BIAS CONNECTIONS ALL MODELS Figure 6 9 Power Transformer Wiring Diagram for Models 655xA and 665xA Sheet 1 of 3 Diagrams 165 WHITE RED GREY GREY ON OFF SWITCH 100 VAC INPUT 51 WHITE RED GREY ON OFF SWITCH 351 GREY WHITE RED GREY ON OFF SWITCH 220 VAC INPUT 351 WHITE RED GREY ON OFF SWITCH 351 240 VAC INPUT TRANSFORMER T1 PRIMARY AC INPUT CONNECTIONS ALL MODELS Figure 6 9 Power Transformer Wiring Diagram for Models 655xA and 665xA Sheet 2 of 3 166 Diagrams 2 MODEL 66514 W2 V3 C r 4 6 MODEL 6652 w2 V3 V4 MODEL 6653A 2 3 MODELS 6654A amp 6655A J404 3405 1403 1402 1401 41401 1405 J403 J404 1405
7. 11 m CEN 92 Specifications 6 _____ _ _ 9 T TB101 terminalisfripe u l u REPE I EUR SEN ERE RUE 91 Test equupm ent required u u EE 9 10 139 Tor AT main BOAT 141 for A4A1 A4A3 left tunnel board 143 for A4A2 A4A4 right tunnel 144 for GPIB board RETRO IP ere ED UR RU 140 LOIA LOI KEIKO d 140 T st Droced fes a E E E a eves 11 tables in E ceeds Re E tre e E Taa ir 11 Tests basic test set UP E RET EO E ION eet eS 11 PARD nii 17 aie Bele a ett eR 15 CO source ote POR 17 current programine LI V LC 15 current sink operation and readback 16 CV load effegtu C na mp 14 LEE 14
8. 8 IM 9 V 11 Model differences between Al main board amp heat sink assembly 86 N Negative logic signals asterisk 7 0 Ordering I ORE 95 Overall troubleshooting 34 37 40 iconstant Current 17 PARD CCmnolse eho 17 PARD 0 6 14 PARD periodic and random deviations 17 PARID 11 Index 175 Part reference designators scoperte E eE E S E Eoee SEEE EEE 95 Parts component location diagrams 137 Parts Ordering information oet ee ed e one ne e e t ei e e tue oret 95 Performance degradation electrostatic esses eene nennen en eene retener 8 Performance test T cOrd ise 0 6 _
9. Report No Date Test Description Minimum Results Maximum Spec 5 Spec Constant Voltage Tests Voltage Programming and Readback Low Voltage 0 V Vout 26 mV mV 26 mV Front Panel Display Readback Vout 40 mV mV Vout 40 mV High Voltage 60 V Vout 59 938 V V 60 062 V Front Panel Display Readback Vout 82 mV Vout 82 mV Load Effect Vou 4 mV Vou 4 mV Source Effect Vout 1 mV mV Vout 1 MV PARD Ripple and Noise Peak to Peak mV 5mV RMS uV 500 uV Transient Response Time 0 mV 60 mV at 100 us Constant Current Tests Current Programming and Readback Low Current 0 A Iou 4 1 mA mA 4 1 mA Front Panel Display Readback 3 MA mA Tou 3 MA High Current 3 5 A Tout 3 49065 A A 3 50935 A Front Panel Display Readback Tout 8 25 mA mA 8 25 mA Current Sink 0 7 A Display Readback Lix 9 25 mA mA Lii 9 25 mA PARD Ripple and Noise RMS 0 1 5 mA Load Effect La 0 25 mA Tou 0 25 mA Source Effect Tou 0 25 mA Tou 0 25 mA Enter your test results in this column Verification 23 Table 2 9 Performance Test Record for Agilent Model 6545 or 6645A MODEL Agilent Report No Date Test Description Minimum Results Maximum Spec 5 Spec Constant Voltage Tests Voltage Programming and Readback Low Voltage 0 5 mV mV 51 mV Front Panel Display Readback Vout 80 mV m
10. 91 ass a 86 Output power amp control e eter listet coire ena 86 87 86 Comparator CITCUIE eoo 83 Constant voltage tests MEE 13 Conventions 200 W V 500 Wicca ee tee eo ea Mete tice etico Aperte te 7 GPIB Vs Analog Proerammabl e 7 6 11 Current programming and readback accuracy 15 Current sink operation and readback oo eee 16 CV load eftect 5 cte UR RR URGERE edente ee ede ene 14 GEV DOSE ss fos see ay 14 oun DE 13 CV source effect aeta ha ete u Nate na aN Sa a 14 Index 173 DC measurements talang average reading ote T RE Un d ie te eben e eerte reete dd 16 Designators von qapa ua DR ED eren ort iH E e Atri t vertreten 95 Diagrams component location EE e ett nhl RE Sets eb ec eite ness 137 I O mtetface PAESI mE 81 _ 84 I
11. N 8 E 2019 pu c us gt gt m o m m 8072 M CU 2 5 8 E 4 Gg lH 5 peT TETA lo 5 Dann hie Iz roto aa 52 B 5 zotan 9219 celo o ZOTAN 0512 6019 ai 1210 s y ci Pi PITA u lt 4 gt gt 2 5 5 x i POTA gt 811 9013 0172 2219 6119 N 5 9 0274 ELIO gt Sri TOTS m LA e X Figure 6 3 GPIB Board Assembly Diagram sheet 1 of 2 101 2 P101 1 0121 LM309K D108 0101 2 y I SEN2 D110 MC3423 R104 GND 4 64K D107 UCC IND REM J114 TELE JACK IN J115 TELE JACK OUT 65 101 16 4101 15 4101 14 4101 1 J101 4 4101 3 4101 2 J101 1 J101 18 _ 101 19 101 20 POTN S U MI UC R102 J101 22 gt V 101 25 J101 24 gt 4 J101 125 4101 17 J101 9 J101 7 J101 8 J101 6 J101 5 J101 11 J101 10 CONN HOLES 504 m e 20 UCC U122 DC TE REN REN IFC IFC NRFD NRFD NDRC NDA
12. 11 variable load s 11 S Safety considerations hazardous 2 8 safety Symbols cic eet oett dico 3 SA secondary interface exiting testai IIII I I I I _ 46 48 SA signals AS micropfOCessOE ice te Den e RR UE 7 0 46 48 SA secondary interface rod dept e 46 48 SCHEMATICS CITCUIt l TRITT 137 Secondary 10terface CITCUIEs u Su a SS Qu i oe nega eines 83 X X _ 88 Sense switch WSC Of 11 Senalnumbets oc veo ten me _ 8 settling times 11 Shock hazard y s noon eere pene bietet o tenere bem E 9 176 Index Signals 3 57 VOltapes Sek eee EE A
13. 14 equipment required Beo epe o e eoe e Ie eei _ 9 load and line regulation s Soe eee sa aie puedes 16 operation VerIfICatlOn OE hc tu a TRO dr e NI rr REOR 11 Index 177 performance test record 11 19 performance tests ii a us ORA EET 11 Setup Tor 11 transient recovery tme seo etie Ut rU ERE RUE bs e re e eei e t een 15 voltage and current val es ER En Ee eed 13 voltage programming and readback 13 Tests power supply abnormal results eee ee S EU eie e P o ods Rate re ER De tte alee 9 o wS u 9 9 Mosel M 9 Transformer AC input 137 Transient recovery tme u eee oed ee eU enam e ede eS 15 Transient response Waveform ehe erre RE e ree Petre tat Re era 15 V Verification Operation 11 Tests er eed ton e be d e erste eR e nus 9 Voltage and c
14. M 11 Performance test rre tr rrr EHE Eee E seats 19 Performance LESts Me 11 Power supplies models nno TERR CEREREM 7 Power supply or 8 Power supply assemblies 1ndex to 95 Power supply models HD 7 Programming Sha tee tec P bre E eire Tp phi 15 fromitront panel cient as tek ast he ae qe ee AE ee a edo 13 from GPIB controller 13 9 85 13 Recovery transient Ome 5 65 9 15 Regulation tests of DC current si ete dete iaaa 16 Remote sensing leads a a sananpa AS 11 72 Replaceable parts 96 200 Watt maim CHASSIS M ass 96 Resistors THEE 11 fixed load iiie eite tr rer REOR V
15. 0 6 in CV mode 0 06 V 6652 54 0 09 V 6651 0 01 V 6655 in CC mode Diagrams 143 Table 6 3 Test Points continued A4A2 A4A4 RIGHT TUNNEL BOARDS FIGURE 6 7 The same measurement conditions apply as were described for the A4A1 A4A3 Left Tunnel Boards OUTPUT CONTROL 0 03V 6651 54 0 06 V 6655 in CV mode U301 3 0 6V in CC mode Stage 1 comparator input 0 03V 6651 54 0 06 V 6655 in CV mode U301 2 0 06V in CC mode Stage FET driver control 4V in CV mode U301 1 4 7V in CC mode Stage 1 reg control 0 6V in CV mode reg Q301 on Q302 3 1 3V in CC mode reg Q301 on Stage 4 comparator input 0 17V in CV mode U302 2 4 4V in CC mode Stage 4 FET driver control 12V in CV mode U302 1 4 4V in CC mode Stage 4 reg control OV in CV mode reg Q307 off Q308 3 1 2V in CC mode reg Q307 on T Models 65 665 1 65 6654 only Not used on 120 V units 144 Diagrams NOTES L FOR MODELS 655xA t 665 500 THE A4 HEAT SINK ASSY IS EXTERNAL TO THE Al MAIN BOARD AS SHOWN IN THIS FIGURE FOR MODELS 654 amp 664xA 200 WATT THE HEAT SINK ASSY TOGETHER WITH THE TUNNEL CIRCUITS ARE PART THE Al MAIN BOARD CONNECTORS 14 JS SHOWN ON THE 2 BGARD ARE PRESENT ONLY DN THE 664xA t 665xA MODELS GPIP 3 CONNECTORS B AND SHOWN ON THE BOARD HAVE DIFFERENT REFERENCE DESIGNATIONS FOR ANALOG PROGRAMMABLE Vs GPIB MODELS AS INDICATED
16. GLN2003A ouT G C615 C616 R732 zx 047 047 721 2 5 15V 50 509 15 2 GATED lt lt INHIBIT ULN2003A 50 F701 WV 125 0221 UR720 U721 14 x gt 12 x ULN2003A 3 6U ULN2003A C617 C618 R733 1 047 7 047 4 64K 500 500 0221 13 OUSCR _ 150 15V 150 150 15V Figure 6 5 A1 Main Board CV CC Control amp Output Bias Shutdown Circuits Schematic Diagram for 654xA amp 664xA Models Only sheet 2B 51 LT1001 CONSTANT VOLTAGE D A LT1001 CONSTANT CURRENT D A LT1001 SUCCESSIVE APPROXIMATION A D 00 11 caog 6509 50 50 6501 sou 047 500 519 047 18 m zl 07 20 CC 2502 5 30 50 5 i yore 50 DCB 9504 001025 0811 1 gt 19 011 4 D 9 1 4501 a en 2 18 D10 3 puo _ og 39 1 11 pcg SUCC 6 Dco 089 11 F6 17 DCO 1 2 6611 DCO P070 P170 5 D 5 TELE DC 8 7 OUCLR 211 516 D 6 2210071 RX 2 JACK 002 918 STX 5 15 4 7 5 OUCLR DC10 ssa Pi Dee 3 006 CU 2414 Fs lt OUSCR 8 Deli Spo Pi 3 2 062 BSTX gt DCS 10 585 outi 515 BSTX 8 3212074 2174 50642 SPCLR Tone 0 4 11 5 OUPROG 316 lt BOUPROG INHIBIT lt 3350
17. 11 Operation V 11 Performances 11 L 13 Constant Voltage Test 13 Au E 13 Voltage Programming and Readback 13 CV Load dee 14 14 iniecta edu dne ere ee te ener dee pode p d a edo ert duode 14 Transient Recovery Time euet Una e REDE UI E soles der eerte ee e 15 Constant Current CC Tests nee _ 15 QC Setup aeter aep D DB OH ARI RE ERR IR Dr FD DER HO Goa hit e trenes 15 Current Programming and Readback Accuracy sessi enne nenne teneret trennen reete ene ene 15 Current Sink CC Operations a u QS _ 16 CC Eoadiand Jane aasan Tem 16 CC Loa EM Chere ET 16 CE Source E EEDE A 17 Noise Quae petet ditus
18. The measurements were taken with full scale voltage and current programmed The measurements were made first in the CV et for full scale voltage and current Test points are listed for the first regulator closest to fan and the last regulator stages only The number of regulator stages that will be on conducting depends upon the output current In the CV mode with no load connected no output current only one or two stages will be on conducting current through the down programmer stages The remaining regulator stages will be off not conducting e and current all regulator stages will be on 0 03V 6651 54 0 06 6655 in CV mode 0 6V in CC mode 0 03V in CV mode 0 6V in CC mode 4V in CV mode 4 7V in CC mode Stage reg control Stage 3 comparator input 0 6V m CV mode reg Q201 on 1 3V in CC mode reg Q201 on 0 065V in CV mode 0 6V in CC mode Stage 3 FET driver control Stage 3 reg control 12 V in CV mode 4 4 V in CC mode OV in CV mode reg Q207 off 1 2V in CC mode reg Q207 on DP CONTROL 0 12V 6651 54 0 24 6655 in CV mode 2 4V 6651 54 2 1 6655 in CC mode DP stage comparator input 0 12 V 6651 54 0 24 6655 in CV mode 2 2 V 6652 54 0 26 V 6651 0 3 V 6655 in CC mode DP stage comparator output 55 1 2V in CV mode 13 6V in CC mode DP stage driver input N
19. 15 00 5 A 21 31 tilos 6 acs 62 HIO 047 18902 85 5 1 5 500 ETT 862 L1 04 A7 8 5 _ 20 29 ace 2 iso pads 105 858208 anc 200 99 24 17 80 07 10 0C10 3 aii 228 12 3 0 12 1 4 57 2 2 SU 76 MC 81213780127 LCD DISPLAY MTG GUARDING 5L 209 N C 0135 Seg Peps 5 c6 2 aaea UPP 1 pu 12 5 5 i 047 16 puli 2 lt LI he V 276256 11 Je 6 9 8 12MHZ 1 5 10 f rad V 2 3 12 C5 C4 2 1 HO 13 14 gt 61 ra 40 Hoco 15 16 1000 1600 RD ADC 0 7 935 HSOS IZ 2 36 0C0 14 502 9501 C14 5U lt _ 047 p ES shu 542 1 2 7 111C AD 7 2 4p 10119 US ance 3 sp 2018 ace 1 vee 18 5 4 302 3155 5 p 416 84 ig 28 o0 6 lay 5015 9 R25 DI ap C10 80 260 60114 8020 542 TOR NMC9346 AD 85 13 ac ancon 9 502 gate aco 1 5573 5 43 7 23Koc4 tow TELE le KIO KICL KICA KICS 4 j oco 1 _ 3 z047 6 2 WS 50 05 1 KEY PLANE 54 182 W6 01 C8 5 MCL W8 RPG SHIELD 1 ae Z TAB OF C13 4200 BOARD SHIELD 250U 7047 3 50 F6 5 V V gt RPG SHIELD NOTE 1 811 resistor values are in OHMS 1 1 78W unless otherwise specified
20. 1 TP2O 0676 0674 C707 RZ44rO C 20 6618 6219 C4616 1 R68 0675 R2716 0000000 0000000 5619 6625 94262010 H 00000000 00000000 R740 0 HR241 e2740 9610 9607 04 7410 OO 5774 E453 E454 4 74 R908 o2 R907 R906 Q u 24 00905 tra 695 21 otra 8 6696 O X0505 20891 0 eoz 50549 Ho z O09 0L2 X C 60 4 402 lt 4 Figure 6 5 A1 Main Board Assembly Diagram for 654xA amp 664xA Models Only 0400 500 E407 4401 1 gt bed 408 1401 2 6 C404 E409 RAIL J401 5 6 704 R4075 R408 E410 J411 3 __ 8909 2 nen 14 148 I 3
21. 1 2 X J411 2 200 JUMPERS R403 5 C405 406 407 408 409 9414 6409 6410 R411 D409 1450 1 J402 1 gt 0 X 5x 5x 5x 5x ZN R784 2 2785 104 2 54 10 10H J402 2 9 0 0 4 OUT INB J402 3 gt 850 OR lt OVP BIAS SEC AC J403 4 NS us R786 2 R787 lt R788 3 1 0 0 0 0 450 2 deser 2 X R416 1403 5 0 2 NOTE 24 OR ZW R412 C415 8695 SR694 8695 JUMPERS BLOCKERS LAY OUT FOR 3W 5 E 5 5 TD i0 SW SW 10W 4411 1 PREVENT C411 C412 4 MISLORDING ala p cs EE NU 02545 1042 7047 500 2500 406 404 2 BIAS pit 2404 5 4 4 h 4 60A L I 500 F402 15404 156 F400 128 Ko 0 58 0406 C416 7047 50 R413 405 1 5405 0407 1K F403 C415 1HP13 E411 J405 2 gt P E d N E412 RAIL F401 6 405 120 108 0 50 TTE E413 FAN PWM E 4 159 er E414 F600 7815 R606 1600 1 0 5 59 GND 0 4 E415 OUT INBOARD R781 2 BIAS J600 2 2 2K m 1 je R605 E416 1 24 REF Yez L 960075 042 me 0601 0UT INB 1000 1 N E 3 1N4150 R773 200K 2 n 6602 C604 C606 500 r 350 IHSG 5 7 35 s HP25 30 3 6 2 4 1 1 5 J601 1 gt 144150 2 V 601 2 8 3 2605 v a HP31 WW 2200UF NOTE UNLESS OTHERWISE SPECIFIED C770 A 1 ALL RESISTORS ARE IN OH
22. 137 USEF test POIS P 139 Diagrams component location 137 Diagrams detailed block nte it peperere aee 83 Downptrograming reSiStOrs peo Up eR 88 E EEPROM reprogramming 90 _ gt gt I___________ __ ___ _ _ _ _ _ __________ _ 90 Electronmc 8 11 Electrostatic discharge conductive table 9M56 56 M id n a iE eere n ERES 8 Electrostatic discharge 8 III 11 Firmware revisions front panel Oen re ROI ant Ru I BA oun bs t 8 GPIB board ROM chip tee eee loses teet eei ete tee Dec qe fete eis 8 quetys ise at eat eb eene etat 8 Form performance test record eite Dente D RR HH DERE PRO IERI T 19 terminal device ho e eR
23. 5 2 09 009 10VIM02 ASHE 03395 NVS AIdd NS ANNI OV ANA 5 SNOILJJNNOD 90916091609 WL 124 VII911X93 HOLINOW NOWI 93N 99199 02 7 009 NMOQINHS SYIS yds 3991 119170 IIBIHNI lt EN AD NOWI 0019 5090 61 22 JOHINOO 25 t p 5H 9203 WOUJOL 001M 00 0 d JOHINO2 YOSAD 2 O 25 di 5 8 69 069 NM __ __ __ _ _ __ 1no iu E 110 39715 SNIAWYHOSOHdNMOQ 2 n BNI 1 0 1 MI 2v SE 207 102 802 I AGE LI 206 902 4050 02 020 ivi 41381 031v9 PT 53915 0IV1053 a3ovisuoivino3d JHL JO 1HVd SI ANIS 1V3H JHL V gt 699 VL99 51300VI 0 LVC 9 IV IV OL MVII 3LX3 SIONY 4 9 913 9 9 515 SINH 7 5 38 SI ANIS 3H1 Dd 13MM L TANNAL 1431 1 4 hu E S v S 9 STIGOW BLON 335 AI8W3SSV NIS IV39 310N y OW 01 V Od VI 01L FJOVIIOA ann ov ts Ircul Figure 4 4 Output Power and Control C Principles of Operation 87 With the CV mode in effect CV loop will regulate the output voltage The control circuit compares the programmed voltage signal CVPROG 0 to 10 V range
24. uppercase CASE 6541A RESTORE Eprom_data_6x41 CASE 6542A RESTORE Eprom_data_6x42 CASE 6543A RESTORE Eprom_data_6x43 CASE 6544A RESTORE Eprom_data_6x44 CASE 6545A RESTORE Eprom_data_6x45 CASE 6641A RESTORE Eprom_data_6x41 CASE 6642A RESTORE Eprom_data_6x42 CASE 6643A RESTORE Eprom_data_6x43 CASE 6644A RESTORE Eprom_data_6x44 CASE 6645A RESTORE Eprom data 6x45 CASE 6551A RESTORE Eprom data 6x51 CASE 6552A RESTORE Eprom data 6x52 CASE 6545A RESTORE Eprom data 6x53 CASE 6554A RESTORE Eprom data 6x54 CASE 6555A RESTORE Eprom data 6x55 CASE 6651A RESTORE Eprom data 6x51 CASE 6652A RESTORE Eprom data 6x52 CASE 6653A RESTORE Eprom data 6x53 CASE 6654A Figure 3 17 Initialization and Factory Preset Replacement Program Listing Sheet 3 of 6 Troubleshooting 69 RESTORE Eprom_data_6x54 CASE 6655A RESTORE Eprom_data_6x55 CASE ELSE PRINT Model number not found Program is for Agilent models PRINT 6541A 6542A 6543A 6544A and 6545A PRINT 6641A 6642A 6643A 6644A and 6645A PRINT 6551A 6552A 6553A 6554A and 6555A PRINT 6651A 6652A 6663A 6654A and 6655A STOP END SELECT FOR 1 1 45 Read model dependent data READ Init data T IF 1 21 OR 1 32 THEN Init_data I VAL Model NEXTI OUTPUT QGPs CLS Clears power supply registers OUTPUT Ps CAL STATE ON Turn on cal mode 0 passcode GOSUB Ps_error
25. 0 5 mA Source Effect Tou 0 5 mA mA Tou 0 5 mA Enter your test results in this column Verification 21 Table 2 7 Performance Test Record for Agilent Model 6543 6643A MODEL Agilent Report No Date Test Description Minimum Results Maximum Spec 5 Spec Constant Voltage Tests Voltage Programming and Readback Low Voltage 0 V Vout 15 mV mV 15 mV Front Panel Display Readback Vout 25 mV mV Vout 25 mV High Voltage 35 V Vout 34 964 V V 35 036 V Front Panel Display Readback Vout 49 5 mV mV Vout 49 5 mV Load Effect Vou 3 mV mV Vou 3 mV Source Effect Vout 1 mV mV Vou 1 mV PARD Ripple and Noise Peak to Peak 0 mV 4 RMS 0 LV 400 Transient Response Time 0 mV 35 mV at 100 us Constant Current Tests Current Programming and Readback Low Current 0 La 6 7 mA mA 6 7 mA Front Panel Display Readback Lu 5 MA mA Tou 5 mA High Current 6 A 5 9843 A A 6 0157 A Front Panel Display Readback Tou 14 mA mA Tou 14 mA Current Sink 1 2 A Display Readback Lai 16 2 mA mA Li 16 2 mA PARD Ripple and Noise RMS 0 mA 3 mA Load Effect Tour 0 25 mA mA Toy 0 25mA Source Effect Tou 0 25 mA mA Tay 0 25 mA Enter your test results in this column 22 Verification Table 2 8 Performance Test Record for Agilent Model 6544 6644A MODEL Agilent
26. 34 34 v 34 34 6 15 lt 007 INB 209 R211 25 70 1 5x 400U 34 R223 2 sx 1744 F204 G 15U DP CONTROL gt N 1250 34072 4 205 211 205 7 1 SEE NOTE 2 50 C206 LEFT TUNNEL NOTES NOTE UNLESS OTHERWISE SPECIFIED 1 0201 203 205 207 ARE SITTING ON SAME HEATSINK IN THE FOLLOWING ORDER FROM FAN 0201 203 205 207 RAIL E gt 6 15U 2 0205 IS ISOLATED FROM HEATSINK Figure 6 6 Left Tunnel Circuits Schematic Diagram for 654 amp 664xA Models Only sheet 2 RAIL 4302 1 Gus R323 2 1 44 F301 1250 5 27801 T 509 1 GATED 150 L_ 4 5 THERM HS 9306 2 _ 4004 4 TUN COM s 89502 4 ji En 5 CONTROL F302 7 R312 1446 eee 5 IX0307 1258 6 I N I C 21 5 055 5 lt 21 5 5055 3 I Al Lease 4 LF412 R331 4 Rase 0 I 7 Y 6 15 L eto _ 305 LY I 6304 F303 1 19807 ae OO R303 0 R313 0 215 215 00 R304 R319 J300 1 4 AA R314 MN 1K 1K R305 R310 R315 8 R320 261K R325 285301 215K R326 gt 8506 2 100k R322 18511 2 2 2 25 25 25 25 25 25 Es c V 4l 5 2 sx sx 5 5 5 gt 25 34 3H 34 24 GH5U J302 3 OUT INB 6 15U C305 7 RIGHT TUNNEL BD 500 NOTE UNLESS OTHERWISE SPECIFI
27. 65 6641A 0160 5422 Capacitor 047UF 20 65 6641A 0160 5422 Capacitor 047UF 20 65 6641A 65 6643A 0160 4791 Capacitor 5 100V 65 6642A 0160 4795 Capacitor 4 7PF 65 6644 65 6645A 0160 4789 Capacitor 15PF 5 100V 0160 482 Capacitor 1200PF 596 65 6641A 65 6643A 0160 4791 Capacitor 5 100V 65 6642A 0160 4795 Capacitor 4 7PF 65 6644A 65 6645A 0160 4789 Capacitor 15PF 5 100V 65 6641A 65 6642A 0160 4801 Capacitor 00 5 0160 4788 Capacitor 18PF 5 100V 65 6641A 0160 6827 Capacitor 022UF 400V 65 6641A 0160 0161 Capacitor 010 10 65 6641A 65 6642A 0160 4803 Capacitor 68PF 5 100V 65 6643A 65 6645A 0160 4801 Capacitor 100 5 0160 5422 Capacitor 047UF 20 0160 5422 Capacitor 047UF 20 0160 4355 Capacitor OIUF 10 65 6641A 65 6642A 0160 4805 Capacitor 47PF 5 100V 65 6643A 65 6645A 0160 4814 Capacitor 150PF 5 65 6643A 65 6645A 0160 4811 Capacitor 270PF 5 65 6643A 65 6645A 0160 4811 Capacitor 270PF 5 0160 4791 Capacitor 5 100V 0160 4807 Capacitor 33PF 5 100V 65 6641A 65 6643A 0160 5422 Capacitor 047UF 20 65 6644A 0160 4834 Capacitor 047UF 10 65 6645A 0160 0159 Capacitor 6800PF 10 0160 4355 Capacitor OIUF 10 65 6641A 0160 4355 Capacitor 10 Replaceable Parts 99 Table 5 5 Parts List 200 Watt A1 Board for Agilent Models 654 and 664xA continued Desig 65 6641A 0160 5410 Capacitor 3300PF 5 65 6641A 0180 4469 Capacitor 4700UF 20V 65 6642A 0180 2724 Capa
28. D101 D108 DAV DFI DFI_EN DP EOI FAN PWM FPRX FPTX GCL GPIB HSRQ IFC IMON IPROG ISRQ KO 0 KO 5 KI 0 KI 5 MSRQ NDAC NEG IMON NRFD OVCMP OVP BIAS OVPROG OVSCR OUT INB PCLR PREN PRX PTX 138 Diagrams Description Address lines Address Data bus Analog Signal read back bus Attention GPIB Buffered OV programming Buffered secondary transmit Constant Current status Constant current programming Constant voltage status Constant voltage programming Data lines Data lines GPIB Data valid GPIB Discrete fault indicator Discrete fault indicator enable Down programming End or identify GPIB Fan pulse with modulation Front panel receive serial data Front panel transmit serial data Gross current limit GPIB chip select GPIB service request Interface clear GPIB Current monitor Current programming Interface service request Keypad output data bus Keypad input data bus Microprocessor service request Not data accepted GPIB Negative current monitor Not ready for data GPIB Overvolage comparator Overvoltage protection bias Overvoltage programming Overvoltage SCR crowbar Inboard side of current monitoring resistor power lead Primary power clear Primary remote enable Primary receive serial data Primary transmit serial data Random access memory chip select Read Ready Remote enable Remote inhibit Inboard side of monitor resistor sense lead Outboard side of monitor resistor sense lead Table
29. J202 TUN COM CONTROL DP CONTROL NC G 15U DP CONTROL C207 TOOPF 100U B HS 14 6 159 F 0208 gt C208 547 7 80202 EE 54 IX0201 I I 212 21 5 2055 5 IX0207 I 4 LF412 i R232 I I 1SU 0 I L T Do Ti 6 15 _ C204 LY I 30086 5 1000 Pau 205 F206 F207 R203 0 R208 0 R218 0 215 215 215 R219 1K R210 R220 MCC REDL 619K eoo 215K R228 R216 5 5 5 5 25 25 34 34 34 52 52 34 34 6 15 4202 35 00 INB 209 E 400U R223 4 7 5x 1744 0201 212 6 150 A 42 2 LEFT TUNNEL BD 144150 C205 NOTE UNLESS OTHERWISE SPECIFIED 1 ALL RESISTORS ARE IN OHMS _ 1 1 8W 2 ALL CAPACITORS ARE IN MICROFARADS 206 3 0201 203 205 207 ARE SITTING SAME HEATSINK IN THE FOLLOWING ORDER FROM FAN 0201 203 205 207 E 50 4 9205 SHALL BE ISOLATED FROM HEATSINK 4 5 DO NOT LOAD THESE COMPONENTS 6 15 Figure 6 6 Left Tunnel Circuits Schematic Diagram for 655 665xA Models Only sheet 1 RAIL 5 HS 14 6 15 C208 CONTROL gt 40 1 I 400U MTP3055 IX0207 R232 0 I R224 5 4 7 sx 1744 F207 R216 25 X 5
30. Not used C700 701 0160 5422 Capacitor 0 047 uF 20 C702 0160 4812 Capacitor 220 pF 5 C703 705 0160 5422 Capacitor 0 047 uF 20 C706 0160 4832 Capacitor 0 01 uF 10 C707 0160 5422 Capacitor 0 047 uF 20 C708 65 6651A 65 6655A 0160 4832 Capacitor 0 01 uF 10 65 6652A 65 6654A Not used C720 65 6651A 65 6655A 0180 4136 Capacitor 10 uF 20V 65 6652A 65 6654A 0180 0374 Capacitor 10 uF 20V C740 0160 4831 Capacitor 4700 PF 10 C741 0160 4801 Capacitor 100 pF 5 C742 65 6651A 65 6655A 0180 0197 Capacitor 2 2 uF 20V TA 65 6652A 65 6654A Not used C770 65 6651A 65 6655A 0180 4136 Capacitor 10 uF 20V 65 6652A 65 6654A 0180 0374 Capacitor 10 uF 20V C771 0160 4830 Capacitor 2200 pF 10 C772 65 6651A 65 6655A 0180 4132 Capacitor 6 8 uF 35V 65 6652A 65 6654A 0180 0116 Capacitor 6 8 uF 35V CR700 65 665 1 A 65 6653A 1884 0349 Thyristor SCR CR701 65 6654A 65 6655A 1884 0340 Thyristor SCR D400 65 6651A 1901 1127 Diode pwr rect 65 6652A 1901 1333 Diode pwr rect 65 6653A 65 6655A Not used 65 6651A 65 6652A Not used 65 6653A 65 6655A 1906 0383 Diode bridge Not used 65 6651A 1901 1127 Diode pwr rect 65 6652A 1901 1333 Diode pwr rect 65 6653A 65 6655A Not used 65 6651A 5060 3228 Assy HS includes diode 1901 0987 65 6652A 65 6653A 1901 0987 Diode pwr rect 65 6654A 65 6655A Not used D406 407 65 665 1 A 65 6653A Not used 65 6654A 65 6655A 1901 0719 Diode D408 65 6651A 5060 3228 Assy HS includes diode 1901 0987 65 6652A 65 6653A 1901 0987 Diode pwr rect
31. R705 R714 C645 59696 R610 R611 5 1 4 5 6 600 CUPROG E lt 3 16K Y 1M 27 4 01 257 1X Ax 2 1708150 15V gt POS 56 250 1744 150 106 15 ceti pu 2656 ore C612 GATED U605 8 s J690 2 15K a C611 15 R616 9 5 EDU 54 IMON 3 RMINB TES 1 TOUT D613 309 lt THERM HS CO 5 gezs 4007 EZ R618 lt R619 Hm R770 i 624 R785 lt 25 lt 464 2412 3 RMOUTB 10 M4 PL SK 1 SK 1 20 115 REF 10K 2 ZN 0614 D610 100 UR610 R646 mm U609 8 5 ou ne 460 72K T Y 2 ROSI 10645 10V 150 70617 2 a 15 R614 R615 1N4150 s V wees L44 r T11CR700 i UOS 4 R629 PAA PAA ie E453 INZI 08611 Y R620 1009 475K 0611 V 150 15V E457 E494 R626 R627 D674 GATED GATED T OUT 0631 gt 4 20K 20K VALS AERA 28 1N645 100 C623 UMON C 2 gt 47 SK 2 5K ai 8222 8 622 ms dx C693 FORI 109 1900 0001 1g C613 e CR BE 50 1200F 4 6 S Re22 100925625 200 L 250 R613 29 045 J691 ANN ET XX C619 Viol 50 20 SENSE 1 AX 1 gt R623 R624 our 20710 SENSE gur 4 4 Zl SPCLR 1000 0612 42 5 CENTER TAP 15 05 R692 R726 159 1710W 1K OUT AM 14645 6614 o 3 83K cou TOUT SHUTDOWN 1 sep TNB 15 ISUP 557 50 2747 1 5532 RATEN 150 15 coegi T3CR701 INI R2z2 1615 C616 J 0721 3 638 91 T T047 15 2 GATED lt
32. Troubleshooting 43 START STOP CLOCK di s c 1 BOARD MODELS 654xA 664xA Figure 3 4 Connections For A2 GPIB Board Models 664xA amp 665xA Only Sheet 2 of 3 44 Troubleshooting U3 PIN OUTS imanan nmana ar d 425855432 9 575555 6463 62 65 5 5 TOP VIEW LOOKING DOMN ON COMPONENT SIDE F PC BORRD s START STOP CLOCK A3 FRONT PANEL BOARD ALL MODELS START STOP SA MODE OCK LEER DES D TS p Wi q S 2 1 BOARD Figure 3 4 Connections 2 GPIB Board Models 664 8 665xA Only Sheet 3 of 3 Troubleshooting 45 Table 3 3 Primary Interface SA Test Description These signatures check some primary interface circuits on the A2 GPIB Board Valid A2U106 ROM Firmware Revision A 01 06 Test Setup See Figure 3 4 Sheet 1 1 Turn off the power supply and remove the top cover 2 Connect SA jumper of connector on A2 Agilent board to pins 1 and 2 Remember the original jumper position as you will need to restore the jumper to its original position after this test 3 Connect signature analyzer CLOCK START STOP and GROUND inputs as shown below Signature Analyzer Edge A2 Board Connection Input Setting CLOCK J106 5 START NM _ J106 6 STOP NM 106 6 GROUND J106 4 4 Turn
33. x 0 7 12mm lg HS rails PCB gnd 0535 0031 Hex nut with lockwasher ref fan top shroud 0535 0082 Hex nut shroud to base AC gnd 0515 1132 Screw mach 5 x 0 8 10 mm lg ref top cover 0515 1105 Screw mach 0 5 10 mm 16 front frame to chassis 0515 0911 Screw mach x 0 5 12 mm lg fan to shroud thermistor 0515 0909 Screw mach x 0 712 mm lg HS rails PCB ground 3050 0893 Washer HS rails GPIB safety cover 6651A 6655A 0160 0895 RFI strip ref top cover 5001 0539 Side trim strips 5040 1666 Hs rail 5040 1667 HS bumper 3050 1053 Washer fl mtlc ref fan to shroud 2190 0586 Washer Ik hlcl ref HS rails PCB gnd 2190 0646 Washer Ik ref AC gnd 1400 0493 Cable tie ref tunnel cables AC bias cable 1400 1281 Cable clip ref tunnel AC power cables 1400 0611 Cable clamp ref front panel phone cable 0370 3238 Knobs ref A3GI A3G2 5001 6740 GPIB board bracket 1510 0044 Binding post 1000 0842 Window ref front panel display 0590 0534 Nut self thd ref display to front panel 1252 1488 Quick disconnect mating plug for DIG CNTL connector A2TB101 1252 3698 Quick disconnect mating plug for external connector AlJ640 5080 2148 Chaining cable for power supply link 5959 3317 operating Manual 9211 5869 Shipping carton 9222 0456 Bag cushioned 9222 1363 Bag static 5080 2120 Foam pad 5080 2211 Label 116 Replaceable Parts Table 5 7 Parts List For 500 Watt A1 Board for 655 amp
34. 65 6654A 65 6655A Not used Replaceable Parts 119 Table 5 7 Parts List For 500 Watt 1 Board for 655 amp 665xA continued Desig D409 1901 1087 Diode pwr rect D600 603 1901 0731 Diode pwr rect D604 606 1901 1098 Diode IN4150 D610 614 1901 0033 Diode D615 619 1901 1098 Diode IN4150 D640 641 1901 0033 Diode D643 650 1901 0033 Diode D651 1901 1098 Diode IN4150 D670 672 1901 1098 Diode IN4150 D673 65 6651A 65 6655A 1901 1098 Diode IN4150 65 6652A 65 6654A Not used D674 676 1901 0731 Diode pwr rect D677 689 Not used D690 65 6651A 1901 1127 Diode pwr rect 65 6652A 65 6653A 1901 0317 Diode pwr IN1184A D691 65 6654A 65 6655A 1901 1383 Diode pwr D700 1901 0033 Diode F400 401 65 6651A 2110 0765 Fuse 20A 250V 65 6652A 55 Not used F402 403 2110 0697 Fuse submin 15AM 32V F600 601 2110 0685 Fuse submin 7AM 125V J401 65 6651A 65 6652A 1251 4781 Connector util Rail 65 6653A 65 6654A Not used 65 6655A J402 65 6651 1251 4781 Connector util center tap 65 6652A 55 Not used J403 65 665 1A 65 6653A 1251 4781 Connector util center tap 65 6654A 65 6655A Not used J404 65 6651A 65 6652A 1251 4781 Connector util Rail 65 6653A 65 6655A Not used 1405 1251 4781 Connector util Rail J411 65 6651 65 6652 Not used 65 6653 65 6655 1251 4781 Connector util Rail J450 1251 7616 Connector util On Off switch J451 1252 3771 Connector AC input J501 1251 8184 Phone Jack serial data J600 1251 4246 Connector test
35. 6553A 6554A 114 Replaceable Parts Agilent Part No 5060 3436 2110 0054 2110 0249 2110 0614 9100 4900 9100 4845 9100 4848 9100 4846 9100 4899 06652 80006 06652 80007 06652 80004 06652 80004 06654 80001 06652 80003 06654 80003 06652 80005 06652 80005 06652 80004 06652 80004 06652 80009 06652 80008 06652 80010 06652 80011 06652 80010 06652 80001 06652 80011 06652 80002 06652 80010 06652 80001 06652 80011 06652 80002 5080 2261 06651 61020 06652 61020 06653 61020 06654 61020 06655 61020 5060 3398 5060 3399 5060 3317 5060 3400 06551 61001 06552 61001 06553 61001 06554 61001 Description Fan 4 inch tubeaxial 12Vdc Fuse 15AM 250V for 100 Vac line Fuse 12AM 250V for 120 Vac line Fuse 7AM 250V for 220 240 Vac line Power Transformer Power Transformer Power Transformer Power Transformer Power Transformer AC cable A1J450 A3S1 AC cable A3S1 T1 Rail T1 A1J404 TI A1J401 Rail TI A1JA11 Rail TI A1J405 Rail TI A1J405 Center Tap 17403 Not Used Center Tap 1 11402 Not Used Rail 1 401 Rail TI A1J404 Not used AC bias TI A1J600 GPIB bias 2 101 Phone cable A1J501 A2J107 Phone cable A2J108 A3A1J6 Phone cable A1J670 A4A1J201 Rail Rail Out Al A4A1J202 Phone cable A1J672 A4A2J301 Rail Rail Out Al A4A2J302 Phone cable A1J671 A4A3J201 Rail Rail Out Al A43J202 Phone cable A
36. 665xA 5959 3350 Operating Manual 654xA 655xA 5959 3374 Operating Manual Replaceable Parts 97 Table 5 5 Parts List 200 Watt A1 Board for Agilent Models 654xA and 664 Desig C202 C204 0160 4801 Capacitor 100 5 205 0160 4835 Capacitor IUF 10 50V C206 65 6641A 0160 4835 Capacitor IUF 10 50V C207 65 6641A 0160 4801 Capacitor 100 5 208 209 65 6641 0160 6806 Capacitor IUF 400V C211 65 6641A 0160 4812 Capacitor 220PF 5 C301 C304 65 6641A 0160 4801 Capacitor 100 5 C305 C36 65 6641A 0160 4835 Capacitor IUF 10 50V C307 65 6641A 0160 4801 Capacitor 100 5 C309 65 6641A 0160 6806 Capacitor UF 400V C405 65 6641A 0180 4461 Capacitor 27000UF 35V 65 6642A 0180 4462 Capacitor 12000UF 63V 65 6643A 0180 4465 Capacitor 4700UF 100V 65 6644A 0180 4463 Capacitor 2700UF 150V 65 6645A 0180 4464 Capacitor 1200UF 250V 65 6641A 0180 4461 Capacitor 27000UF 35V 65 6642A 0180 4462 Capacitor 12000UF 63V 65 6643A 0180 4465 Capacitor 4700UF 100V C407 65 6641A 0180 4461 Capacitor 27000UF 35V C408 65 6641A 0180 4461 Capacitor 27000UF 35V C413 0160 5469 Capacitor IUF 1096 50V C414 C415 0160 5422 Capacitor 047UF 20 C416 0180 3963 Capacitor 17000UF 16V C418 65 6641A 65 6642A 0160 5422 Capacitor 047UF 20 65 6643A 65 6644A 0160 0168 Capacitor 10 65 6645A 0160 6806 Capacitor 10 0160 4183 Capacitor 1000 20 65 6641 0160 4183 Capacitor 1000 20 0160 4413 Capacitor 6UF 10 01
37. 816 C I6611 626 00 2627 C H C4R73at0 6 R625 C0613 II lo 6645 oO _ G R7226 o 290 OF OD On ood CC effReo7ro 725 9 do omnes 0 G R785r9 cesa D e IR224 9 20 OlR O C 27225 6 250999006 9 5 J691 7 40 5 sf S c9 ERN R7879 R2886 RAIL Figure 6 5 A1 Main Board Assembly Diagram and Test Points for 655xA amp 665xA Models Only 0000000000000000000 0C04500 OC4510 019545109 CI 0000000000 CCC000000C 502 0000000000 0000000000 7060 604 5016 C506 J501 000 oou 521 G RS504 0 515 0 5 6674 6 6 C0700 714 704 R661 GUR67 OLE 1 96 R679 O 616 1600 R2S1 9 0000000 O4C6272rO 2671
38. Full Scale Max Prog Max Prog Voltage Voltage Current Current Overvoltage 200 Watt Supplies 6541A 6641A 8 V 8 190 V 20 A 20 475 A 8 8 6542A 6642A 20 V 20 475 V 10 4 10 237 22 6543A 6643A 35 V 35 831 V 6A 6 142 A 38 5 V 6544A 6644A 60 V 61 425 V 3 5 3 583 66 0 V 6545A 6645A 120V 122 85 V 1 5A 1 535 A 132 V 500 Watt Supplies 6551A 6651A 8 190 V 50 51 188 8 8 V 6552A 6652A 20V 20 475 V 25 25 594 22 V 6553A 6653 35 35 831 V 15A 15 536 A 38 5 6554 6654 60 V 61 425 V 9A 9 214 A 66 0 V 6555 66554 120 V 12285vV 4A 4095A 132 V Verification 13 CV Load Effect This test measures the change in output voltage resulting from a change in output current from full load to no load a Turn off the supply and connect the output as shown in Figure 2 1 with the DVM connected between the S and S terminals b Turn on the supply and program the current to the maximum programmable value and the voltage to the full scale value see Table 2 3 c Adjust the load for the full scale current see Table 2 3 as indicated on the front panel display The CV annunciator on the front panel must be on If it is not adjust the load so that the output current drops slightly Record the output voltage reading on the DVM connected to S and S e Open the load and again record the DVM voltage reading The difference between the DVM readings in steps d and e is the load effect
39. J601 1251 4245 Connector fan J640 1252 3693 Connector control external J670 673 1251 8184 Phone jack Tunnel boards J690 691 06652 00005 Bus bar Q670 1854 0872 Transistor NPN Q700 1854 0477 Transistor NPN 2N2222A Q770 5060 3322 Assy includes XSTR and HS R403 65 6651 A 65 6653A 8159 0005 Resistor 0 Ohms 65 6654A 55 Not used R404 Not used 120 Replaceable Parts Table 5 7 Parts List For 500 Watt 1 Board for 655 amp 665xA continued Desig R405 R407 408 R409 R415 R416 R450 R501 R502 R504 R505 R506 R507 R508 R509 511 R512 R513 514 R515 R516 518 R520 R600 R60 1 R605 607 R610 R611 R612 R613 R614 615 R616 R617 R618 65 6651 65 6653 65 6654 65 6655 65 6651 65 6652 65 6653 65 6655 65 6651 65 6652A 55 65 665 1A 65 6653A 65 6654A 65 6655A 65 6651 65 6652A 55 65 6651A 65 6652A 65 6653A 65 6654A 65 6655A 65 665 1A 65 6653A 65 6654A 65 6655A 8159 0005 0811 1857 0810 0018 0811 1873 0811 1914 0813 0050 0811 1799 0757 0280 0811 0944 0811 1873 0811 1914 8159 0005 0698 8827 0698 3456 1810 0305 0757 0458 0750 0428 0699 1212 0698 6392 0750 0442 0757 0401 0698 3456 0757 0465 0757 0462 0698 0084 0698 3155 0811 3849 8159 0005 0698 6360 0698 6343 0757 0442 0698 6630 0698 3156 0683 2255 0757 0279 0757 0441 Resistor 0 Ohms Not used Not used Not used Resistor 400 5 5W PW Not used Not used Resistor 100 3 5
40. Test Description Voltage Programming and Readback Low Voltage 0 V Vout Front Panel Display Readback High Voltage 120 V Vout Front Panel Display Readback Load Effect Source Effect PARD Ripple and Noise Peak to Peak RMS Transient Response Time at 100 us Current Programming and Readback Low Current 0 A Lu Front Panel Display Readback High Current 4 A Lu Front Panel Display Readback Current Sink 0 8 A Display Readback PARD Ripple and Noise RMS Load Effect Source Effect Report No Minimum Spec Constant Voltage Tests 51 mV Vout 80 mV 119 877 V Vou 164 mV Vou 5 mV Vou 2 mV 0 0 0 Constant Current Tests 4mA La 3 MA 3 990 A Tour 9 mA Link 9 8 mA Tour 0 5 mA Tour 0 5 mA Results mV mV mV mV mV mV LV mV mA mA Enter your test results in this column Date mc y Spec 51 mV Vout 80 mV 120 123 V Vout 164 mV Vou 5 mV Vou 2 mV 7 mV 700 IV 120 mV 4 mA Tour 3 MA 4 010 9 MA Link 9 8 mA 2mA Tour 0 5 mA Tour 0 5 mA Verification 29 Troubleshooting SHOCK HAZARD Most of the troubleshooting procedures given in this chapter are performed with power applied and protective covers removed Such maintenance should be performed only by service trained personnel who are aware of the hazards for example fire and electrical shock This i
41. models the convention models 654xA or 655xA respectively is used 4 In this manual all complementary signal names in text are shown with an asterisk after the signal name Example PCLR In some schematic diagrams you may see a bar above the signal name which is identical to the signal name shown in text with an asterisk Introduction 7 Manual Revisions Agilent Technologies instruments are identified by a ten character serial number such as US36360101 This manual was written for power supplies with serial numbers equal to or higher than those shown on the title page If the serial number on the rear panel of your power supply is higher than the one on the title page then the power supply was made after publication of this manual and may have hardware and or firmware differences not covered in this manual If there are such differences they are documented in one or more yellow Manual Changes sheets sent with the manual If the serial number of your power supply is below that listed on the title page or if it uses an older serial number format such as 3023A 01456 then your power supply was made prior to those covered in this manual If this is the case refer to Appendix A for any backdating information that may apply Safety Considerations This product is Safety Class 1 instrument that has a protective earth terminal Refer to the Safety Summary page at the beginning of this manual for general safety proce
42. protective earth terminal will cause a potential shock hazard that could result in personal injury Whenever it is likely that the protective earth connection has been impaired this instrument must be made inoperative and be secured against any unintended operation Only fuses with the required rated current voltage and specified type normal blow time delay etc should be used Do not use repaired fuses or short circuited fuseholders To do so could cause a shock or fire hazard Do not operate this instrument in the presence of flammable gases or fumes Do not install substitute parts or perform any unauthorized modification to this instrument Some procedures described in this manual are performed with power supplied to the instrument while its protective covers are removed If contacted the energy available at many points may result in personal injury Any adjustment maintenance and repair of this instrument while it is opened and under voltage should be avoided as much as possible When this is unavoidable such adjustment maintenance and repair should be carried out only by a skilled person who is aware of the hazard involved Capacitors inside this instrument may hold a hazardous electrical charge even if the instrument has been disconnected from its power source SAFETY SYMBOLS Instruction manual symbol The instrument will be marked with this symbol when it is necessary for you to refer to the instruction manual in order to pr
43. with the output voltage monitor signal VMON The VMON signal is in the 0 to 10 V range which corresponds to the zero to full scale output voltage range of the supply If the output voltage exceeds the programmed voltage the OUTPUT CONTROL signal goes low causing the output transistor to conduct less and decrease the output voltage Conversely if the output voltage is less than the programmed voltage the OUTPUT CONTROL signal goes high causing the output transistors to conduct more and increase the output voltage Depending upon the position of the SENSE switch the output voltage is either monitored at the supply s output terminals local or at the load remote using the S and S terminals with remote sense leads connected to the load If the output voltage goes higher than the programmed value the downprogramming stage is turned on Note that an external signal VP can be used to program the output voltage in the CV mode A 0 to 5 V externally applied signal produces a proportional output voltage from zero to full scale VP is summed with the CVPROG and VMON signals With the CC mode in effect the CC loop regulates the output current The CC control circuit compares the programmed current signal CCPROG 0 to 10 V with the output current monitor signal IMON The IMON signal is produced by measuring the voltage drop across current monitoring resistor R657 RMON The IMON signal is in the 0 to 10 V range which corresponds to the ze
44. 01511 21 35014 __ 00396 18 3602 01541 22 23 35184 00416 19 3619 ___ 01761 _ 24 3542A 00466 20 36214 01781 25 35484 00481 21 3603A 00531 22 6655 3050 0011 3 10 36194 __ 00621 24 31134 00126 6 36204 __ 00626 25 31264 00151 11 3126 ___ 00176 1 6652 300 001211 7 3215 __ 00236 5 3021A 00151 8 14 323254 00261 2 3035A 00231 3 9 3347A 00326 16 3127A 00321 11 3403A 00351 _ 15 3135 00371 12 13 3503 00491 18 3217A 00501 5 3548 00586 21 3235A 00631 2 3602A __ 00671 22 23 3347 01271 16 36194 00801 24 3501 01721 18 3622A 00811 25 35194 02031 19 Do not make change 22 units with the following 3541 __ 02361 _ 20 serial numbers 3617A 02841 through 02845 3548 02641 21 22 36174 ___ 02861 24 25 170 Appendix 1 CHANGE 2 CHANGE 3 CHANGE 4 CHANGE 5 CHANGE 6 CHANGE 7 CHANGE 8 CHANGE 9 CHANGE 10 CHANGE 11 CHANGE 12 CHANGE 13 CHANGE 14 In Table 5 5 amp 5 7 Add Capacitor C740 4700 pf 10 100 V P N 0160 4831 Qty 1 In Table 5 9 Change Capacitor C138 from 0 01 uf 10 100 V P N 0160 5422 to 0 047 uf 20 50 V P N 0160 4832 Change resistor R134
45. 0699 0211 Resistor 859 1 65 6644A 0698 5347 Resistor 495 5 1 65 6641A 65 6642A 0698 8671 Resistor 273 2 1 1 65 6645A 0699 1982 Resistor 1 055K 1 65 6643A 0699 0211 Resistor 859 1 6516644A 0698 5347 Resistor 495 5 1 0698 6320 Resistor 5K 1 125W 0698 6320 Resistor 5K 1 125W 0698 6630 Resistor 20K 1 0698 6630 Resistor 20K 1 0698 6320 Resistor 5K 1 125W 0698 0084 Resistor 2 15K 1 0698 6320 Resistor 5K 1 125W 0698 3156 Resistor 14 7K 1 65 6643A 65 6644A 0811 3770 Resistor 05 Ohm 1 65 6641A 5080 2217 Resistor SHUNT 005 Ohms 65 6642A 5080 2218 SHUNT 01 Ohms Replaceable Parts 109 Table 5 5 Parts List 200 Watt A1 Board for Agilent Models 654xA and 664xA continued Desig 65 6645 0811 3771 Resistor 25 Ohm 1 0757 0458 Resistor 51 1 1 65 6643 0757 0316 Resistor 42 2 1 65 6644A 0698 3433 Resistor 28 7 1 65 6641A 65 6642A 0698 3432 Resistor 26 1 1 65 6645A 0757 0397 Resistor 68 1 1 0698 6977 Resistor 30K 1 125 65 6643A 0757 0316 Resistor 42 2 1 65 6644A 0698 3433 Resistor 28 7 1 65 6641A 65 6642A 0698 3432 Resistor 26 1 1 65 6645A 0757 0397 Resistor 68 1 1 0698 6320 Resistor 5K 1 125W 0698 0084 Resistor 2 15K 1 0698 6320 Resistor 5K 1 125W 0698 6630 Resistor 20K 1 0698 6630 Resistor 20K 1 0757 0280 Resistor 1K 1 125W 0698 0084 Resistor 2 15K 1 8159 0005 Resistor Zero Ohms 65 6641 65 6645 0757 0280 Resistor 1K 1 125W 0698 3160 Resistor 31 6K 1
46. 110 114 115 121 0160 6734 Capacitor 0 047 20 C122 0180 4606 Capacitor 25V C123 0160 6497 Capacitor 1000pF 5 C124 0180 4116 Capacitor 22uF 15 V C125 0160 6734 Capacitor 0 047uF 20 C126 127 0160 5959 Capacitor 33pF 5 100V C128 0160 4281 Capacitor 2200pF 20 C129 134 0160 6734 Capacitor 0 047 20 C135 0180 4116 Capacitor 22uF 15 V C136 0160 5955 Capacitor 68pF 5 100V C137 0160 6497 Capacitor 0 14 50V C138 0160 5945 Capacitor 0 01LIC 50V C139 140 0160 6734 Capacitor 0 047 50V C141 0180 4116 Capacitor 22uF 20V C142 0160 5950 Capacitor 470pF 50V D107 110 1901 1335 Diode power rectifier 111 112 1906 0337 Diode IN4150 D115 116 1901 1332 Diode IN5817 D119 120 1902 1634 Diode zener 18 2V 5 F101 2110 0699 Fuse subminature 5AM 125V J101 1252 2320 Connector receptacle GPIB J106 1251 4926 Connector receptacle test header 2107 108 114 115 1251 7330 Connector receptacle phone L101 9140 1101 Inductor 470nH 0101 1251 4245 Connector plug 2 pin ac bias 0101 1853 0525 Transistor PNP 2N4917 R103 0699 1391 Resistor 10K 1 R104 0699 1384 Resistor 4 64K 1 R105 0699 2682 Resistor 10 M 5 R106 0699 1360 Resistor 46 4Q 1 R107 0699 1431 Resistor 464Q 1 R108 0699 1415 Resistor 1000 1 R109 0699 1431 Resistor 464Q 1 R111 114 0699 1
47. 1205 0758 Heatsink U121 0340 1277 Insulator Y101 0535 0031 Nut hex w lockwasher J101 0515 0642 Screw M 3 5 x 0 6 8 mm lg pan head U121 0515 0911 Screw M 3 x 0 5 12 mm lg pan head J101 1200 0567 Socket IC 28 pin U106 1200 0639 Socket 20 pin U119 120 1200 1274 Socket IC 0114 130 Replaceable Parts Table 5 10 Front Panel Board Replaceable Parts For Models Ref Desig Agilent Part No Description Cl 0160 5422 Capacitor 0 047 20 C2 0160 4808 Capacitor 470pF 5 C4 0160 4787 Capacitor 22pF 5 100 V C5 0180 0155 Capacitor 2 2uF 20 V C6 7 0160 5422 Capacitor 0 047uF 20 C8 0160 4835 Capacitor 0 1uF 10 50 V C10 12 14 16 0160 5422 Capacitor 0 047 20 C17 0180 0155 Capacitor 2 2uF 20V D1 2 1906 0229 Diode array 50V J2 1251 4927 Receptacle LCD display J3 1251 4926 Receptacle test header J4 5 1252 0718 Receptacle A3G2 J6 1251 8184 Receptacle phone GPIB board L1 9140 0158 Inductor 10 R1 1810 0560 Resistor network DIP R2 0698 3359 Resistor 12 7K 1 R23 25 27 30 0698 3155 Resistor 4 64K 1 R37 1810 0371 Resistor network SIP R38 0698 3441 Resistor 215Q 1 0 125 W R39 40 0698 3155 Resistor 4 64K 1 RTI 0837 0412 Thermistor 16 1902 0950 Diode zener 4 7V 5 U3 1820 6721 IC MPU 04 5080 2466 ROM programmed front panel U6 1818 4792 IC memory 08 1820 2724 IC SN74ALS573
48. 1MHZ 16 AC4 15 AC3 14 R 2 13 AC1 ES CLEUIS PCB MTG HOLES CLEUIS ROM 0C0 000 Dc1 gt 14 29 ace 001 Dot 29 ACB 0 2 15 Das 23 25 13 28 ace 2a aco 14 15 Dczo 18 24 10 18 aio 4 ACO 20 004 011 27 R 11 01407 19 005 20 005 215 8012 0 6 21 DC2 22 006 615 22 000 11 pcs 171004 911 005 A12 DC6 DC2 18 19 C111 047 500 2 A115 25 24 ace i auo 23 11 2 AC12 006 013 96159 014 L 814 UCC VSS RI R135 PCLR 5 11 0118 INA OUTA INB OUTB 9108 129 042 042 50 50 0117 gm C133 047 047 0U 500 1000PF 500 R136 1 9101 2 R109 464 C103 1000PF 500 SECONDARY MC ISOLATION PCLR 100 R122 FPRX FPTX WN R138 __CLAMPt INC OUTC IND OUTD DS3658N 1 3 2 6 8 CLAMP2 M R105 180 10 10 128 2200PF 777 2504 DF I GND DFI OUT Figure 6 3 GPIB Board Schematic Diagram sheet 2 of 2 lt M e e 9 c
49. 25K 05 65 6655A 65 6654A 0699 2248 Resistor 47 5K 05 65 6651A 0699 3103 Resistor 19K 05 65 6652A 0699 2248 Resistor 47 5K 05 65 6653A 0699 2879 Resistor 80K 05 Sppm 1W 65 6654A 0699 2198 Resistor 243K 05 65 6655A 0699 3104 Resistor 250K 05 65 6651A 0698 6362 Resistor 1K 1 65 6652A 0698 6631 Resistor 2 5K 1 65 6653A 0698 6614 Resistor 7 5K 1 65 6654A 0698 3988 Resistor 42K 1 65 6655A 0698 6353 Resistor 50K 1 0698 6320 Resistor 5K 1 125W 0757 0481 Resistor 475K 1 0698 4470 Resistor 6 98K 1 0698 4014 Resistor 787 1 125W 0698 3156 Resistor 14 7K 1 0698 3162 Resistor 46 4K 1 0698 6320 Resistor 5K 1 125W Not used 65 6651A 65 6652A 0757 0442 Resistor 10 1 125W 65 6655A 65 6653A 65 6654A 0698 3155 Resistor 4 64K 0698 3456 Resistor 287K 1 0698 6343 Resistor 9K 1 0698 8061 Resistor 8 25K 1 0757 0442 Resistor 10 1 125W 0698 6630 Resistor 20K 1 0698 3156 Resistor 14 7K 1 0757 0280 Resistor 1K 1 125W 122 Replaceable Parts Table 5 7 Parts List For 500 Watt 1 Board for 655 amp 665xA continued Desig 65 6651A 65 6652A 0699 1156 Resistor 72K 1 65 6653A 65 6654A 0698 6353 Resistor 50K 1 65 6655 0698 6359 Resistor 80K 1 R647 648 0698 6344 Resistor 900 1 R649 650 0698 6320 Resistor 5K 1 125W R651 652 0698 6630 Resistor 20K 1 R653 0698 6320 Resistor 5K 1 125W R654 0698 0084 Resistor 2 15K 1 R655 0698 6320 Resistor 5K 1 125W R656 0698 3 156
50. 3434A 00168 17 3623 00218 24 65514 __ 32074 00103 4 34244 00153 17 3533A 00218 19 3549A 00223 20 21 36244 00228 24 25 65524 __ 32034 __ 00103 4 34234 00228 17 35264 00323 19 3541A 00403 20 35484 00503 21 36194 00758 24 3632 00798 25 Model Prefix Serial Change 6553 3202 00103 4 34234 0028 17 35494 00401 21 36 9 00481 24 3621A 00486 25 6554 3205 00103 4 3422A 00213 17 36044 00333 21 23 3620A 00363 24 3623A _ 00368 25 6555A 3209A 00103 4 3402A 00143 15 3428 00153 17 36034 ___ 00193 21 23 3622A 00198 25 3624A 00203 24 6641A 31414 00106 1 32174 00111 5 3237 00131 2 3348A 00236 16 35044 00281 18 3519 00296 19 35444 00351 20 3619A 00406 24 6642 31424 __ 00106 1 3218 00126 5 3235 0017 2 3347A 00461 16 3502 00771 18 3518 00921 19 35424 01241 20 3619 01501 24 Appendix 169 Serial Change Model Prefix Serial Change
51. 5 mA mA Ton 0 5 mA Source Effect Tou 0 75 mA mA Tay 0 75 mA Enter your test results in this column Verification 27 Table 2 13 Performance Test Record for Agilent Model 6554A 6654A MODEL Agilent Report No Date Test Description Minimum Results Maximum Spec 5 Spec Constant Voltage Tests Voltage Programming and Readback Low Voltage 0 V Vout 26 mV mV 26 mV Front Panel Display Readback Vout 40 mV mV Vout 40 mV High Voltage 60 V Vou 59 938 V V 60 062 V Front Panel Display Readback Vout 82 mV mV Vout 82 mV Load Effect Vou 4 mV _____ Vou 4 mV Source Effect Vout 1 mV mV Vout 1 MV PARD Ripple and Noise Peak to Peak mV 5mV RMS 500 uV Transient Response Time 0 60 mV at 100 us Constant Current Tests Current Programming and Readback Low Current 0 A Lut 8 mA mA 8 mA Front Panel Display Readback 7 MA mA Tou 7 MA High Current 9 A Tout 8 9785 A A 9 0215 Front Panel Display Readback Tout 20 5 mA mA 20 5 mA Current Sink 1 8 A Display Readback Lii 21 3 mA mA 21 3 mA PARD Ripple and Noise RMS 0 mA 3 mA Load Effect Tou 0 5 mA mA Iy 0 5 mA Source Effect Tou 0 5 mA mA Iy 0 5 mA Enter your test results in this column 28 Verification Table 2 14 Performance Test Record for Agilent Model 6555 or 6655 MODEL Agilent
52. 6 1 Signal Descrptions continued Signal Name Description ROM Read only memory chip select SPCLR Secondary power clear SRQ Service request GPIB SRX Secondary receive serial data STX Secondary transmit serial data Ambient temperature THERM HS Heat sink temperature UART Universal asynchronous receive transmit chip select signal VMON Voltage monitor VOS Voltage offset VPROG Voltage programming WR Write 15 ISUP 15 volt supply is up has stabilized Test Points Table 6 3 lists the test points that appear on the schematic and component location diagrams The table includes the test point e g the circuit point AIU608 15 and the signal name CV The Measurement and Conditions column gives signal measurements and the conditions e g operating mode required to obtain the measurement Where measurements differ the applicable models are specified in the table The following table list summary information about notes appearing in schematic diagrams Table 6 2 General Schematic Notes 1 resistors are in ohms 1 1 8 W unless otherwise specified 2 All capacitors are in microfarads unless otherwise specified 3 Signal lines that are terminated by flags continue on other sheets and may also go to other locations on the same sheet Example CVPROG SH 2 8C SH 2 8C indicates the sheet number and the coordinates on that sheet
53. 65 6643A 65 6645A 0698 3162 Resistor 46 4K 1 65 6641 65 6642 0757 0459 Resistor 56 2K 1 0698 3162 Resistor 46 4K 1 65 6643A 65 6644A 0698 3150 Resistor 2 37K 1 65 6641A 0698 4440 Resistor 3 4K 1 65 6642A 0757 0279 Resistor 3 16K 1 65 6645A 0698 3150 Resistor 2 37K 1 0698 8826 Resistor 825K 1 0757 0280 Resistor 1K 1 125W 65 6643 65 6644 0757 0280 Resistor 1K 1 125W 65 6641A 0698 0084 Resistor 2 15K 1 65 6642A 0757 0283 Resistor 2K 1 125W 65 6645A 0757 0279 Resistor 3 16K 1 65 6643 65 6644 0698 3160 Resistor 31 6 1 65 6641 0698 3162 Resistor 46 4K 1 65 6642A 65 6645A 0757 0459 Resistor 56 2K 1 0698 3160 Resistor 31 6K 1 0757 0442 Resistor 10 1 125W 0757 0419 Resistor 681 1 125W 0757 0416 Resistor 511 1 125W 65 6643A 0757 0274 Resistor 1 21K 1 65 6644A 0698 3153 Resistor 3 83K 1 65 6641 65 6642 0757 0280 Resistor 1K 1 125W 65 6645A 0698 3156 Resistor 14 7K 1 65 6643A 0757 0274 Resistor 1 21K 1 65 6644A 0698 3153 Resistor 3 83K 1 110 Replaceable Parts Table 5 5 Parts List 200 Watt A1 Board for Agilent Models 654xA and 664xA continued Desig 65 6641 A 65 6642A 0757 0280 Resistor 1K 1 125W 0683 1065 Resistor 10 5 25W 0698 3162 Resistor 46 4K 1 0698 3162 Resistor 46 4K 1 0698 3153 Resistor 3 83K 1 65 6641A 0757 0443 Resistor 11K 1 125W 65 6642A 0757 0452 Resistor 27 4K 1 65 6643A 0757 0457 Resistor 47 5K 1 65 6644A 0757 0463 Resistor 82 5K 1 6
54. 8159 0005 Resistor Zero Ohms 8159 0005 Resistor Zero Ohms 8159 0005 Resistor Zero Ohms 8159 0005 Resistor Zero Ohms 8159 0005 Resistor Zero Ohms 8159 0005 Resistor Zero Ohms 65 6645A 8159 0005 Resistor Zero Ohms 65 6645A 8159 0005 Resistor Zero Ohms Replaceable Parts 101 Table 5 5 Parts List 200 Watt A1 Board for Agilent Models 654xA and 664 continued Desig 2110 0697 Fuse subminature 15 32V 2110 0697 Fuse subminature 15AM 32V 65 6641 A 65 6644A 8159 0005 Resistor Zero Ohms 65 6641 A 65 6642A 8159 0005 Resistor Zero Ohms 65 6641 A 65 6644A 8159 0005 Resistor Zero Ohms 65 6641 A 65 6644A 8159 0005 Resistor Zero Ohms 2110 0699 Fuse subminature 5AM 125V 2110 0699 Fuse subminature 5AM 125V 65 6642A 8159 0005 Resistor Zero Ohms 65 6642A 8159 0005 Resistor Zero Ohms 65 6642A 8159 0005 Resistor Zero Ohms 65 6642A 8159 0005 Resistor Zero Ohms 2110 0671 Fuse 125AM 125V 2110 0671 Fuse 125AM 125V 2110 0671 Fuse 125AM 125V 65 6642A 8159 0005 Resistor Zero Ohms 1251 4245 Connector 2 PIN M 1251 5339 Connector UTIL 1251 3837 Connector 4 PIN M 1252 3771 AC LINE MODULE 1252 2105 Connector UTIL 1251 8184 MOD PHONE RCPT 1251 4246 Connector POST TP HDR 1252 0063 Connector POST TP HDR 1252 3693 Connector 0360 1809 Barrier block 65 6641 A 65 6644A 1854 0989 XSTR NPN SI 65 6645A 1855 0849 MOSFET N CHAN 65J6641A 65 6642A 5060 3315 FET Assembly HS 1855 0725 65 6643A 65 6644A 5060 3314 FET Assembly HS 1855
55. DAC Circuits Troubleshooting KEEN 1 WIB IE MI II XI I I 6561 0 2 5 0IV A CV DAC U508 6 AND CC DAC 5 6 OUTPUTS 0 2 mS OIV READBACK OAC 0912 6 OUTPUT Figure 3 11 DAC Waveforms Figure 3 12 CV CC DAC and Amplifier Troubleshooting Troubleshooting 59 START SERIAL DOWN NOTES 1 IF SECONDARY APPEARS ON THE OISPLAY FIRST DISPLAY READS SERIAL DOWN OR AND THEN SERIAL DOWN IS OK PLAYED GO TO FIGURE 3 14 SERIAL TIMEOUT SEE NOTE 1 TURN OFF SUPPLY AND REMOVE TOP COVER THIS REMOVES THE GPIB BOARD OR ISOLATOR BOARD UNPLUG FROM 108 ON THE A2 FROM THE DATA PATH AN CONNECTS THE FRONT PANEL GPIB BOARD R THE 81 ISOLATOR DIRECTLY TO THE MAIN BOARD BOARD AND UNPLUG W9 FROM 501 ON THE MAIN BOARD PLUG CABLE INTO IF THIS DOES NOT FIX THE PROBLEM REPLACING THE 4501 SEE NOTE 2 TURN ON SUPPLY AND 2 GPIB BOARD MAY BE THE MOST COST TRY TO PROGRAM IT FROM THE FRONT EFFECTIVE SOLUTION TURN OFF SUPPLY REMOVE FRONT PANEL ASSEMBLY TO GAIN ACCESS TO CIRCUITS ON FRONT PANEL BOARD A3 TURN ON SUPPLY AND CHECK FOR PULSES AT A3U3 IT AND 18 SEE FIG 3 48 CHECK GO TO THE ISOLATOR BOARD TROUBLESHOOTING FLOW DIAGRAM YES PULSES TURN SUPPLY OFF AND RETURN CABLES AT A3J 3 18 W8 AND W10 TO THEIR ORIGINAL POSITIONS NO TURN SUPPLY ON AND CHECK PCLR SIGNAL YES A2U101 8 TEST POINT SEE TABLE 6
56. IN TABLE 1 TABLE 1 REFERENCE DESIGNATOR ASSIGNMENTS i I I i I I i I mer I MEAT 411 wx I A1 A4 RIGHT TUNNEL BOARD I 1 1 ce jol Ja 2 s LI FIG 6 7 I L i I 4 THE INTRAWIRING BETWEEN XFMR II 1 1 I AND THE Al MAIN BOARD VARIES FROM E a MODEL TD MODEL AS DOES THE NUMBER OF INTERFACING CONNECTORS REFER FIGURE 6 2 TD SEE THE WIRING wi PARTICULAR MODEL Ka Ree eee 5 8 9 AND WIO ARE TELEPHONE 1 PWR 1 CABLES WITH PHONE CONNECTORS DN SWITCH ON EITHER END OF CABLE P gt 6 THIS IS CONNECTOR 601 FOR 1 I 655 amp 665 MODELS AND J602 FOR l H 654 amp 664 MODELS l NS DISPLA I FRONT PANEL i BDARD I i t FRONT PANEL ASSY ENE E J Figure 6 1 Power Supply Interconnection Diagram for All Models FOR MODELS 6552A 6652 FOR MODELS 6553A 6653A Al MAIN BOARD Al BOARD FOR MODELS 6651A 66514 Al MAIN BOARD l i 1495 2485 Ja 3483 1 3422 di 7481 Re GPIB BOARD 2 GPIB BOARD 71 SEE SEE NOTES NOTES t 4 E 65 FOR MODELS 6551A 6555A 6651A 6655A FOR MODELS 6554A 6654A FOR MODELS 6555A 6655A 91 MAIN BOARD Rl MAIN BORRD II 24 NIA gp PRIFR
57. N Terminal for Neutral conductor on T Off supply permanently installed equipment Terminal is at earth potential Standby supply Used for measurement and control Units with this symbol are not completely circuits designed to be operated with disconnected from ac mains when this switch is one terminal at earth potential off To completely disconnect the unit from ac mains either disconnect the power cord or have a qualified electrician install an external switch Notice The information contained in this document is subject to change without notice Agilent Technologies makes no warranty of any kind with regard to this material including but not limited to the implied warranties of merchantability and fitness for a particular purpose Agilent Technologies shall not be liable for errors contained herein or for incidental or consequential damages in connection with the furnishing performance or use of this material This document contains proprietary information which is protected by copyright All rights are reserved No part of this document may be photocopied reproduced or translated into another language without the prior written consent of Agilent Technologies Copyright 1993 2000 Agilent Technologies Inc Printing History The edition and current revision of this manual are indicated below Reprints of this manual containing minor corrections and updates may have the same printing date Revised editions ar
58. Resistor 14 7K 1 R657 65 6651A 06651 20002 Resistor 0027 current monitor 65 6652 5080 2007 Resistor 005 current monitor 65 6653A 5080 2079 Resistor 013 current monitor 65 6654A 06654 80004 Resistor 020 current monitor 65 6655A Resistor 028125 current monitor 0757 0458 Resistor 51 1K 1 65 6651A 65 6652A 0698 4395 Resistor 78 7K 1 65 6653A 0757 0398 Resistor 75 1 125W 65 6654A 65 6655A 8159 0005 Resistor 0 65 6651A 65 6652A 0699 1156 Resistor 72K 1 65 6653A 65 6654A 0698 6353 Resistor 50K 1 65 6655A Not used 65 6651A 65 6652A 0698 4395 Resistor 78 7 1 65 6653A 0757 0398 Resistor 75 1 125W 65 6654A 55 8159 0005 Resistor 0 R663 0698 6320 Resistor 5K 1 125W R664 0698 0084 Resistor 2 15K 1 R65 665 0698 6320 Resistor 5K 1 125W R666 667 0698 6630 Resistor 20K 1 R668 0757 0280 Resistor 1K 1 125W R669 0698 0084 Resistor 2 15K 1 R670 8159 0005 Resistor 0 Ohms R671 Not used R672 0757 0280 Resistor 1K 1 125W R674 0698 3160 Resistor 31 6 1 R675 65 6651A 0757 0458 Resistor 51 1K 1 65 6652A 65 6654A 0757 0459 Resistor 56 2K 1 65 6655A 65 6653A 0754 0457 Resistor 47 5K 1 0698 3162 Resistor 46 4K 1 65 6651A 65 6652A 0698 3558 Resistor 4 02K 1 65 6653A 0757 0279 Resistor 3 16K 1 65 6654A 0698 4440 Resistor 3 4K 1 65 6655 0698 3496 Resistor 3 57K 0698 8826 Resistor 825K 1 0757 0280 Resistor 1K 1 125W Replaceable Parts 123 Table 5 7 Parts List For 500 Watt 1 Boa
59. are two test header connectors A3J3 and A2J106 The A3J3 connector is located on the A3 front panel board and the A2J106 connector is located on the A2 GPIB board see Figure 3 3 They are accessible when the top cover is removed from the supply For models 654xA amp 655xA only the A3J3 test header is used 2 MODE 2 MODE 4 DIG 1 0 4 INHIBIT CAL 6 lt RELAY 6 FACTORY PRESET CAL NORM AS SHIPPED TEST HEADER 2 GPIB BOARD TEST HEADER ON A3 FRONT PANEL NOTE USED ON 664xA amp 665 MODELS ONLY NOTE USED ON ALL MODELS Figure 3 3 Test Header Jumper Positions Troubleshooting 41 Front Panel Test Connector A3J3 Pins 1 and 2 SA MODE 3 and 4 INHIBIT CAL 5 and 6 FACTORY PRESET CAL 7 and 8 NORM Primary Interface Test Connector A2J106 Pins For Agilent Models 664xA amp 665xA Only 1 and 2 SA MODE 3 and 4 DIG I O 5 and 6 RELAY LINK 7 and 8 FLT INH Description With these pins jumpered the front panel is placed in the SA mode Removing the jumper takes the front panel out of the SA mode With these pins jumpered the power supply will ignore calibration commands thus providing security against unauthorized calibration With the jumper removed the power supply will respond to calibration commands With these pins jumpered the power supply s calibration constants are set to their factory prese
60. e RUE 8 172 EB 11 pmi e EE 11 Calibration BAC CAL jumper positlOn et 8 6 M 90 90 90 MODE jumper position 90 Calibration from the front panel V V V 5 I 90 Rae een 7 9 ee a 6 6 6 49 59 83 86 CC load and line r gulation teet M 177 5 16 17 iei es p e e doe e ld tee Dre or e i e e a ito o e ote 15 source effect test ose eme o A Ee RUE UO RUE EN exe e bre Idee bet I 17 Circuits MOVE PEE 83 front panel uten 89 Isolator 2 3 nenas ea h
61. e est SE neha ty 17 TFEOUDIESHOOtING e s 31 ner Sedan aces 31 Test Equipment Required u D b 31 Overall Troubleshooting eee AL mean 34 Power On Self e on ntn ER PER 34 M 35 Firmware Revisions for Models 664x A amp 665xA n nunus 41 Test Headers PMCID EE 41 Troubleshooting Procedures _ _ 49 POW Charts 49 9 49 Status Annunciators 49 Post Repair CalibTafIOB 49 Inhibit Calibration Juniper 49 Calibration aa eese eU 50 EEPROM Initialization I I 66 Transferring Calibration Constants I
62. from 5 1 4 W P N 0683 1025 to 100 ohm 5 1 4 W P N 0683 1015 In Table 5 9 Change Capacitor C107 and C108 from 22 pf P N 0160 4787 to P N 0160 4807 In Table 5 10 Change Capacitors C3 and C4 from 22 pf P N 0160 4787 to 33 pf P N 0160 4807 In Table 5 10 Remove Magnetic Core Qty 1 REF front Panel phone cable P N 9170 1497 In Table 5 10 Change cable assembly for PCB keypad From P N 5060 3464 to P N 5060 3427 Delete Magnetic Core P N 9170 1497 REF Front panel phone cable In Table 5 5 Change Resistors R691 and R692 to 1K P N 0757 0280 In Table 5 9 Change Optoisolators 0110 and Ul11 from P N 5080 2176 Qty 2 to P N 1990 1387 In Table 5 9 Remove Capacitor C136 68 pf 5 100 V Ceramic P N 0160 4803 In Table 5 5 Change Operational amplifier U605 from OP270 P N 1826 2252 Qty 1 to LT 1057 P N 1826 1845 In Table 5 5 Remove heatsink HS600 P N 1205 0282 Agilent 6651A only Remove Capacitor C646 47 pf P N 0160 4805 In Table 5 9 Change Optoisolator U110 111 Qty 2 from P N 1990 0444 to Lead formed P N 5080 2176 Remove Resistor R137 100 ohm 196 1 8 watt P N 0757 0401 Remove Capacitors C138 140 Qty 3 0 047 uf P N 0160 5422 Remove Inductor L101 Qty 1 150 nH P N 9100 1610 In Tables 5 5 amp 5 7 Change Resistor R785 from 115 ohms 196 1 8 W P N 0698 4406 to 68 1 ohm 196 1 8 W In Tables 5 5 amp 5 7 Remove Capacitor C742 see change 20 Remove Resistor R754 2 15 ohms 1 1
63. in CV mode 5V in CC mode CV or CC control Sheet 2 OUTPUT CONTROL Sheet 2 0 03V 6651 54 0 06V 6655 in CV mode 0 6V in CC mode 0 03V 6651 54 06V 6655 in CV mode 0 6V in CC mode 8 Gross current limit circuit Sheet 2 DP CONTROL Sheet 2 BOVPROG Sheet 2 14V in CV or CC mode 0 13V 6651 54 0 24V 6655 in CV mode 2 4V in CC mode 0 to 5V PWM pulses 5 C og C aS N C UK P 142 Diagrams OV circuit Sheet 2 OV circuit Sheet 2 OV circuit Sheet 2 OV circuit Sheet 2 THERM HS Sheet 3 THERM AMB Sheet 3 3 8V with max OVP programmed 3 8V with max OVP programmed 0 2V with full scale voltage programmed 6651 54 0 6V with full scale voltage programmed 6655 5V no OV conditions 5V with no load and cold heat sinks 4 5V with 23 C ambient Table 6 3 Test Points continued A4A1 A4A3 LEFT TUNNEL BOARDS FIGURE 6 6 Leave meter or scope common connected to test point mode with no load and then in the CC mode with the load In the CC mode with the load set for full scale output voltag OUTPUT CONTROL comparator input to all stages Stage 1 comparator input Stage 1 FET driver input when taking measurements at test points through
64. on the power supply and u the signature analyzer probe to take the following signatures Power 5 V 9FFP Serial Link A2U 109 3 0104 Microprocessor A2U114 24 9FFP A2U114 25 UF39 Digital Control Interface A2U118 1 9AFI A2U118 9 40A5 A2U 118 10 1029 A2U 118 15 0010 A2U 118 16 040A Gated Array Logic 20119 2 0A55 A2U119 5 0040 A2U119 15 0040 5 After completing the tests be sure to return the J106 jumper to its original position 46 Troubleshooting Table 3 4 Front Panel SA Test Description These signatures check microprocessor A3U3 on the front panel board Valid A3U4 ROM Firmware Revision A 01 07 Test Setup See Figure 3 4 Sheet 2 for 200 Watt or Sheet 3 for 500 Watt supplies 1 Turn off the power supply and remove the top cover 2 To gain access to A3 Front Panel Board perform steps a and b of the disassembly procedure for Front Panel Assembly See Disassembly Procedures later in this chapter position as you will need to restore the jumper to its original position after this test 3 Connect SA jumper between pins 1 and 2 of connector J3 on Front Panel board Remember the original jumper 4 Connect signature analyzer CLOCK START STOP and GROUND inputs Be sure to unplug the cable from J2 in order to access the connector pins Signature Analyzer Edge A3 Front Panel Board Input Setting Connection CLOCK m a J2 9 START an J2 11 STOP N 2 11
65. os et Nh ego 91 93 93 _ 88 CVPRO crc 88 a NIE A 89 FAN PWM sign l 2 anre HU 89 MON ee 88 INHIB 88 Relate 86 85 OVPROG 85 Al 85 88 I ee e uan Oe eet IG 91 92 86 bene t RI UR nU Reeve e US 92 8 86 91 93 oT a O D e EE EEE a Sa VA gei 92 93 oem pend 93 91 93 88 OHIO OMA OBI MEE 92 IEW Bcc
66. programmed value of voltage on the bus into the CVPROG signal which is sent to the CV control circuits in order to control the magnitude of the output voltage in the CV mode The CVPROG signal is in the 0 to 10 V range which corresponds to the zero to full scale output voltage range of the supply The CC DAC Op amplifier converts the programmed value of current on the bus into the CCPROG signal which is sent to the CC control circuits in order to control the magnitude of the output current in the CC mode The CCPROG signal is in the 0 to 10 V range which corresponds to the zero to full scale output current range of the supply The comparator circuits in conjunction with the readback DAC Op amplifier return the following signals to the microprocessor see Figure 4 3 Monitored output voltage Monitored output current IMON Negative monitored output current NEG IMON Ambient temperature THERM AMB Heat sink temperature THERM HS Programmed voltage value CVPROG Programmed current value 84 Principles of Operation The readback DAC circuit is controlled the microprocessor to successively approximate the value of each signal monitored to twelve bit resolution The CVPROG and CCPROG signals are used during the self test to check operation of the DAC Op amplifier circuits SERIAL TO FROM DATA 8STx FIG 4 6 STX BOVPROG OVCMP PR
67. recalibrate the supply as described in Appendix A of the Operating Manual 50 Troubleshooting START DISPLAY TURN OFF SUPPLY AND REMOVE TOP COVER UNPLUG CABLE FROM ON GPIB BOARD OR J801 ON ISOLATOR BOARD UNPLUG CABLE W9 FROM 0507 AI MAIN BOARD PLUG CABLE WtO INTO J501 ON MAIN BOARD THIS REMOVE THE GPIB BOARD ISOLATOR BOARD FROM THE DATA PATH AND CONNECTE THE FRONT PANEL TO THE MAIN BOARD TURN GN SUPPLY TRY PROGRAM THE SUPPLY FROM THE FRONT PANEL WHILE MEASURING THE OUTPUT VOLTAGE PROGRAM THE VOLTAGE AND CURRENT TO FULL SCALE TOGGLE THE ON OFF KEY WHILE OBSERVING THE EXTERNAL VOLTMETER DISPLAY DOES NOT OPERATE SUPPLY OPERATES PROPERLY CHECK GPIB BOARD OR ISOLATOR BOARD BIAS CIRCUITS AND PCLR SIGNAL TEST POINTS 1 TABLE 6 3 CHECK CABLE W9 TURN OFF SUPPLY REMOVE FRONT PANEL ASSEMBLY IN ORDER TO GAIN ACCESS TO CIRCUITS ON FRONT PANEL BOARD TURN ON SUPPLY CHECK 5V BIAS AT 6 CHECK DISPLAY VOLTAGES AT 81 14 2 2 Rt 2 3 3N AT 81 16 CONNECT METER COMMON TO 3 SEE FIG 6 24 CHECK 3C1 RTI YES CHECK 10 MHz CLOCK SIGNAL AT A3U3 66 SEE FIG 3 4B CHECK A3Y1 C4 PROGRAM OUTPUT VOLTAGE AND CURRENT AT THE FRONT PANEL MEASURE VOLTAGE AT SUPPLY S OUTPUT TERMINALS IM CASE THE OUTPUT 1 DISABLED PRESS OUTPUT ON OFF KEY WHILE OBSERVING THE OUTPUT VOLTAGE WITH AN EXTER
68. slow compared to computers and system voltmeters settling times and slew rates of the power supply may have to be taken into account Wait statements can be used in the test program if the test system is faster than the supply Current Monitoring Resistor To eliminate output current measurement error caused by voltage drops in the leads and connections connect the current monitoring resistor between the OUT and the load as a four terminal device Connect the current monitoring leads inside the load lead connections directly at the monitoring points on the resistor element Operation Verification Tests To assure that the supply is operating properly without testing all specified parameters perform the following test procedures a Perform the turn on and checkout procedures given in Chapter 3 of the Operating Manual b Perform the Voltage Programming and Readback Accuracy test and the Current Programming and Readback Accuracy Performance test which are given in this chapter Performance Tests Note A full Performance Test consists of those items listed as Specifications in Table 1 1 of the Operating Manual that have a procedure in the Verification section of this chapter The following paragraphs provide test procedures for verifying the supply s compliance with the specifications listed in Table 1 1 of the Operating Manual All of the performance test specifications are listed in the appropriate Performance Test Record Form for
69. the front panel Slide the cover backward until it clears the rear of the power supply COVER HOLDING SCREWS TWO SCREWS OPPOSITE SIDE Figure 3 19 Location of Carrying Strap Restraining Screws Power Supply Side View A2 GPIB Board Removal amp Replacement for 664xA amp 665xA Models Only To remove the GPIB board proceed as follows ono gt Remove the top cover of the power supply as described under Top Cover Removal and Replacement At the rear of the power supply remove the protective standoff piece directly above the AC power receptacle Remove the two 2 7 mm hex screws that hold the GPIB connector in place At the rear of the supply remove the two 2 screws that hold the HB IB board to the chassis From the top of the power supply disconnect the phone cable at connector J107 on the GPIB board the other end of this cable goes to the main board Disconnect the phone cable at connector J108 on the GPIB board the other end of this cable goes to the front panel board Disconnect connector P101 on the GPIB board the other end of this cable goes to the transformer secondary Remove the GPIB board from the power supply by gently pulling back on the metal holding clip that holds the front end of the GPIB board in place To reinstall the GPIB board perform the above steps in reverse order 74 Troubleshooting A2 BOARD A2 BOARD HOLDING GPIB HOLDING HOLDING SCREW SCREWS SCREW oper
70. the time delay of the PCLR signal which is obtained from the isolated SPCLR signal M BIAS i 5 V L BIAS SUPPLY 0895 n ISOLATOR 0890 ___ ____ Tu Rx F OPTO ISOLATOR U801 D gt a Ie OPTO ISOLATOR U802 ES REFERENCED REFERENCED TO SUPPLY TO EARTH COMMON GROUND NOTE 600 VOLT OPTO ISOLATORS PROVIDE A AIR 690 VOLT AIR GAP BETWEEN FRONT PANEL CIRCUITS AND SECONDARY CIRCUITS Figure 4 7 Isolator Board Simplified Block Diagram Models Agilent 654xA and 655xA Note Note that for Agilent 664xA and 665xA models the PCLR is generated in the GPIB board For Agilent models 654xA and 655xA the PCLR originates at the main board secondary circuits and is routed to the isolator board 92 Principles of Operation The isolator board includes three separate optical isolator circuits that isolate the front panel signals RxD TxD and PCLR signals from the SRx BSTx SPCLR signals at the secondary interface circuits POWER 5 VOLTS POWER LOSS TURNED FULLY OR TURNED ON SETTLED OFF Figure 4 8 5 V BIAS and PCLR Timing Sequence Principles of Operation 93 Replaceable Parts Introduction Chapter Organization This section lists the replaceable electrical and mechanical parts for the Agilent 654xA Agilent 655xA Agilent 664xA and Agilent 665xA power supplies Component location diagr
71. your specific model You can record the actual measured values in the column provided in this form Verification 11 12 Verification CV TESTS TO OSCILLOSCOPE OR AMS VOLTMETER SET TO R LOCAL REMOTE LI DVM CV TESTS nm TO DVM OR RMS VOLTMETER RESISTOR CC TESTS SEE TABLE USE DC POWER SUPPLY SAME POLARITY CONNECTIONS FOR TEST ELECTRONIC LOAD CURRENT MONITORING RESISTOR 6541A 6641A 6551A 6651A 100 A 0 01 OHMS 6552A 6652A 0 04 6542A 6545A 6642A 6645A 6553A 6653A 15 A 0 1 OHMS 6554A 6654A 0 04 6555A 6655A Figure 2 1 Basic Test Setup Programming You can program the supply from the front panel keyboard or from a GPIB controller for models 664xA and 665xA when performing the tests The test procedures are written assuming that you know how to program the supply either remotely from a GPIB controller for 664xA and 665xA models or locally using the control keys and indicators on the supply s front panel For models 654xA and 655xA you must use the front panel Complete instructions on remote and local programming are given in the Operating Manual Constant Voltage CV Tests CV Setup If more than one meter or if a meter and an oscilloscope are used connect each to the terminals by a separate pair of leads to avoid mutual coupling effects For constant voltage DC tests connect only to S and S since the unit regulate
72. 0 180 156 37 26 510 DATA 120 15 20 0 4 Supply must be at address 705 Data address Data for word length EEPROM data for 6541A and 6641A EEPROM data for 6542A and 6642A EEPROM data for 6543A and 6643A EEPROM data for 6544A and 6644A Figure 3 17 Initialization and Factory Preset Replacement Program Listing Sheet 1 of 6 Troubleshooting 67 520 530 Eprom_data_6x45 540 550 560 570 580 590 DATA 32 42 16 6 122 85 0 82 0 2358 140 1 537 0 DATA 100 1 5 313 117 38 132 0 82 255 20 10 DATA 6545 30 41 168 18 2436 168 18 1768 5 255 0 0 DATA 16 6545 0 20 180 20 180 156 37 26 DATA 186 15 20 0 4 600 Eprom data 6x51 610 620 630 640 650 660 DATA 486 3 16 6 8 19 0 83 0 70 16 136 86 51 188 0 DATA 99 1 78 25 78 25 8 8 0 83 255 20 10 DATA 6551 456 09 168 18 72 47 168 18 1768 5 255 0 0 DATA 16 6551 0 20 180 20 180 156 37 26 DATA 186 15 20 0 4 670 Eprom data 6x52 680 690 700 710 720 730 DATA 195 534 4 434 20 475 0 83 0 141 87 97 29 25 594 0 DATA 99 1 42 512 17 75 22 0 83 255 20 10 DATA 6552 167 156 130 156 1768 5 255 0 0 DATA 16 6552 0 20 180 20 180 156 37 26 DATA 186 15 20 0 4 740 Eprom data 6x53 750 760 TIO 780 790 800 DATA 111 16 35 35 831 0 83 0 224 127 15 356 0 DATA 99 1 18 68 79 5 38 5 0 83 255 20 10 DATA 6553 104 3 171 7 231 8 164 2 1768 5 255 0 0 DATA 16 6553 0 20 180 20 180 156 37 26 DATA 186 15 20 0 4 810 Eprom_data_
73. 0 MHz Heatsink U121 Insulator Y 101 Nut hex w lockwasher J101 Screw M 3 5 x 0 6 8 mm lg pan head U121 Screw M 3 x 0 5 12 mm lg pan head J101 Table 5 9B A2 GPIB Board Replaceable Parts for 664xA amp 665xA through hole Refer to Backdating for units to which this board applies Ref Desig Agilent Part No Description C102 105 C106 C107 108 C109 111 114 115 121 C122 C123 C124 C125 C126 127 C128 C129 134 C135 C136 C138 140 D107 110 111 114 D115 116 D119 120 F101 J101 0160 4822 0180 0155 0160 4787 0160 5422 0180 3325 0160 4822 0180 0228 0160 5422 0160 4807 0160 4281 0160 5422 0180 0228 0160 4803 0160 5422 1901 0731 1901 1098 1901 1080 1902 0766 2110 0699 1252 0268 Capacitor 1000pF 5 Capacitor 2 2uF 20 V Capacitor 22pF 596100 V Capacitor 0 047uF 20 Capacitor 25V Capacitor 1000 5 Capacitor 22uF 15 V Capacitor 0 047uF 20 Capacitor 33pF 5 100V Capacitor 2200pF 20 Capacitor 0 047uF 20 Capacitor 22uF 15 V Capacitor 68pF 5 100V Capacitor 0 047uF 20 Diode power rectifier Diode IN4150 Diode IN5817 Diode zener 18 2V 5 Fuse subminature 5AM 125V Connector receptacle GPIB Replaceable Parts 129 Table 5 9B A2 GPIB Board Replaceable Parts for 664xA amp 665 Only continued Ref Desig Agilent Part No Description J106 1251 4926 Connector receptacle test header J107 108 114 115 1251 7330 Connector receptacle pho
74. 0199 Resistor 21 5K 1 0757 0441 Resistor 8 25K 1 0757 0280 Resistor 1K 1 125W 0683 0475 Resistor 4 7 5 25W 0698 3162 Resistor 46 4K 1 0757 0199 Resistor 21 5K 1 0757 0199 Resistor 21 5K 1 0757 0199 Resistor 21 5K 1 0757 0280 Resistor 1K 1 125W 0683 0475 Resistor 4 7 5 25W 0698 3160 Resistor 31 6K 1 0757 0465 Resistor 100 1 0698 8816 Resistor 2 15 1 0757 0442 Resistor 10 1 125W 0757 0442 Resistor 10 1 125W 0698 6979 Resistor 111 1K 1 0698 6376 Resistor 200K 1 0698 7842 Resistor 26 1K 1 0698 6630 Resistor 20K 1 0698 3629 Resistor 270 5 2W MO 0686 2225 Resistor 2 2K 5 5W 0757 0405 Resistor 162 1 125W 65 6641A 8159 0005 Resistor Zero Ohms 65 6643A 8159 0005 Resistor Zero Ohms 65 6644A 8159 0005 Resistor Zero Ohms 6645A 8159 0005 Resistor Zero Ohms 65 6642 65 6645 06652 60006 Assy Thermistor 65 6642A 65 6645A 0837 0412 Thermistor 3101 2966 SW SL DPDT 3101 2966 SW SL DPDT 3101 2894 SW PB DPDT 1826 1533 IC 34072 1826 1533 IC 34072 1826 1533 IC 34072 1826 1533 IC 34072 5080 2150 PRGMD GAL MAIN 1826 1370 IC 365 5080 2250 PRGMD IC SEC 1826 1369 IC Voltage regulator 1826 1533 IC 34072 1826 2187 IC Converter D A 1826 1896 IC Linear 1826 2187 IC Converter D A 1826 1896 IC Linear 1826 2187 IC Converter D A CA CC ae Cn Cn CA oocococc 112 Replaceable Parts Table 5 5 Parts List 200 Watt A1 Board for Agilent Mode
75. 05 65 6641A 0699 3103 Resistor 19K 05 65 6642A 0699 2248 Resistor 47 5K 05 65 6643A 0699 2879 Resistor 80K 05 5PPM 1W 65 6644A 0699 2198 Resistor 243K 05 65 6645A 0699 3104 Resistor 250K 125W 65 6641A 0698 6362 Resistor IK 1 125W 65 6642A 0698 6631 Resistor 2 5K 1 65 6643A 0698 6614 Resistor 7 5K 1 65 6644A 0698 3988 Resistor 42K 1 65 6645A 0698 6353 Resistor 50K 1 0699 2246 Resistor 25K 05 65 6641A 0699 3103 Resistor 19K 05 65 6642A 0699 2248 Resistor 47 5K 05 65 6643A 0699 2879 Resistor 80K 05 5PPM 1W 65 6644A 0699 2198 Resistor 243K 05 65 6645A 0699 3104 Resistor 250K 125W 65 6641A 0698 6362 Resistor 1 125W 65 6642A 0698 6631 Resistor 2 5K 1 65 6643A 0698 6614 Resistor 7 5K 1 65 6644A 0698 3988 Resistor 42K 1 65 6645A 0698 6353 Resistor 50K 1 0698 6320 Resistor 5K 1 125W 0757 0481 Resistor 475K 1 0698 4470 Resistor 6 98K 1 0698 4014 Resistor 787 1 125W 0698 3156 Resistor 14 7K 1 0698 3162 Resistor 46 4K 1 106 Replaceable Parts Table 5 5 Parts List 200 Watt A1 Board for Agilent Models 654xA and 664xA continued Desig 0698 6320 Resistor 5K 1 125W 65 6641A 65 6642A 0757 0442 Resistor 10 1 125W 65 6643A 65 6644A 0698 3155 Resistor 4 64K 1 65 6645A 0757 0442 Resistor 10 1 125W 0698 3456 Resistor 287K 1 0698 6343 Resistor 9K 1 125W 0698 8061 Resistor 8 25K 1 0757 0442 Resistor 10 1 125W 0698 6630 Resistor 20K 1 0698 3156 R
76. 05 Pi sS D S SGND pcz 128 R516 gt 817 SPCLR 20 6 pro 0862 De njas UNEN SPCLR 19 gt 20 7 21 7 002 Z 2 15 C506 GA 1698 50 0602 ______15 c Ey 16 5 6 12 16 F 1980 ae WR uREFcS 22 m 19 500 V P3 0 19 25 1 gt 5 2517 pte paves IMON 5 2 3 25 35 2 15 FaNara 261244 23 4 TS 50 6521 27 2 5 P3 5 512 wd 2 28 2 6 5 22 500 R501 18 xTAL2 1 042 XTRLi RST 55 lt SPCLR 30 NEG IMON R518 287K 501 PSEN lt 5 iu L5 AAN 80651 GND 0509 12MHZ 7545 522 MAS 20 SECONDARY MICROPROCESSOR Dx 11 4 I prel Iset U DB10 550 12 gt 14 anaco P 8C0 7 N DB L cup 7 SU 111 6502 503 0 8 7 1088 BE D2 8 pg gt s sss 05 9 mis 27 5 05 121055 000015 CUPROG 7 Yes 157 100K 150 RS14 1000 _____ 15 62 0518 VREF 525 047 100 19 500 042 500 8504 51 1K 6517 5 C515 047 54 15U 50 22 15V 16 UDD 0511 s 4 7548 0811 RFB R508 150 DC10 5 0810 08 6 36 0 8 7 10K 0506 5 X8 7 5 2 8 061 so R506 16985 ANN t G 2 THERM HS 19K 1x 12 gt X4 AGND ae XC5 085 DGND IAE 61 15 082 THERM AMB gt 505 1
77. 0641 65 6641 65 6644 1854 0989 XSTR NPN SI 65 6645A 1855 0849 MOSFET N CHAN 65 6641A 65 6642A 5060 3315 FET Assembly HS 1855 0725 65 6643A 65 6644A 5060 3314 FET Assembly HS 1855 0641 65 6641 A 65 6644A 1854 0989 XSTR NPN SI 65 6645A 1854 1162 XSTR NPN 65 6641A 65 6642A 5060 323 1 Regulator Assembly HS 1853 0497 65 6643A 65 6645A 5060 3250 ASSY HS REG 1853 0642 65 6641 A 65 6644A 1854 0989 XSTR NPN SI 65 6645A 1855 0849 MOSFET N CHAN 65 6641A 65 6642A 5060 3315 FET Assembly HS 1855 0725 65 6643A 65 6644A 5060 3314 FET Assembly HS 1855 0641 65 6641 A 65 6644A 1854 0989 XSTR NPN SI 65 6645A 1855 0849 MOSFET N CHAN 65 6641A 65 6642A 5060 3315 FET Assembly HS 1855 0725 65 6643A 65 6644A 5060 3314 FET Assembly HS 1855 0641 102 Replaceable Parts Table 5 5 Parts List 200 Watt A1 Board for Agilent Models 654xA and 664 continued Desig 65 6641 A 65 6644A 1854 0989 XSTR NPN SI 65 6645A 1855 0849 MOSFET N CHAN 65 6641A 65 6642A 5060 3315 FET Assembly HS 1855 0725 65 6643A 65 6644A 5060 3314 FET Assembly HS 1855 0614 65 6641 65 6644 1854 0989 XSTR NPN SI 65 6645A 1855 0849 MOSFET N CHAN 65 6641A 65 6642A 5060 3315 FET Assembly HS 1855 0725 65 6643A 65 6644A 5060 3314 FET Assembly HS 1855 0641 65 6641 65 6644 1854 0989 XSTR NPN SI 65 6645A 1855 0849 MOSFET N C H AN 65 6641A 65 6642A 5060 3315 FET Assembly HS 1855 0725 65 6643A 65 6644A 5060 3314 FET Assembly HS 1855 061
78. 1403 2405 1 MAIN BOARD 1 BOARD A1 MAIN BOARD M MAIN BOARD TRANSFORMER T1 SECONDARY AC POWER CONNECTIONS Figure 6 9 Power Transformer Wiring Diagram for Models 655xA and 665xA Sheet 3 of 3 Diagrams 167 Manual Backdating Changes A Manual backdating changes describe changes that must be made to this manual for power supplies with serial numbers that are lower than those listed on the title page Look in the following table and locate your model power supply Then look at the serial numbers listed for that model If any serial number of your power supply is lower than any of the serial numbers listed then only make the change indicated in the change column for the serial numbers that are higher than the serial number of your unit Note that several changes may apply to your unit Model Prefix Serial Change 65414 3215 00108 5 3215 00168 17 3518A 00193 19 3543A 00223 20 36204 00293 24 65424 __ 32214 __ 00113 5 3425 00238 17 3519A 00293 19 35484 00338 20 3619 00393 24 65434 __ 32184 __ 00113 s 3425 00218 17 3619 00408 24 65444 __ 32194 __ 00113 5 3433A 00163 _ 17 36204 00233 24 65454 3215A __ 00118 5 34084 00148 15
79. 150 R640 R641 31 6K 9 R6 Rie 150 Beda 8 15 ISUP R685 5 80610 s 8 U607 825K 681 C702 C643 gt R672 1 R686 SK 1 SK 1 184150 681 WN CON 047 6 SU TROL 750644 15 a HS Za 0670 215 GATED X 11645 C661 4 LFA12 4 LF412 1N4150 R679 J670 15U R645 7ND618 1K 1 TELE 2 7 0649 AA 1N4150 1 15U 15U 2 JACK T5U R650 R663 C672 w 5 644 4 5 6 uh SK 1 sk 1x C646 R632 0 82709 2 150 0650 20616 50 r Z 14625 mie 144150 gt 14 7 2671 721 0708 _ C708 100 6 2N2222A 150 Res S101 D673 OUSCR gt mr 750645 5 1 5 TP2 18450 R676 9671 14645 15V NVV vio 1 VLM20030 U506 20k 14 7 REF 2 TELE R654 R664 1 8 Ax 4GCL 4 JACK g R715 R652 3 VVV gt 5 2 15 2 15K 4 5 e 46 4 a 46 4 ik D6 I IMON ZND646 1 Pos C700 C BOUPROG IMON 15V D671 gt 509 UPROG ASU 144150 LF412 4 R677 2609 C671 22 02k J672 1 i TELE SP 150 10956 JACK III 9640 NEG IMON ae V 2 6305 II 249 9 6 pos R702 SENSE R655 R665 V EM 2655 R680 500 sense NY g U610 DP CONTROL SK 1 SK 1 15V 14150 2 Ne 0200 Anessa c ae R687 QUCMP gt bo 14645 14645 150 sj gt RE J673 R704 R612 A 0672 26817 1 TELE AAA 5U 4105412 IN41S0 m LI 2 100K 10 0606 JACK C702 15U 4 R617 D615 10K 4
80. 1J673 A4A4J301 Rail Rail Out Al A4A4J302 Ribbon cable A3A1J2 LCD display Main PCB Tested Main PCB Tested Main PCB Tested Main PCB Tested Main PCB Tested Isolator Board Tested GPIB Board PCA Tested surface mount see Table 5 9A GPIB Board PCA Tested through hole see Table 5 9B Front Panel Board Unitialized and Tested Front Panel Board Initialized amp Tested Front Panel Board Initialized amp Tested Front Panel Board Initialized amp Tested Front Panel Board Initialized amp Tested Table 5 6 Parts List For 500 Watt 655 amp 665xA Chassis continued Reference Desig A4A3 4 4 A4RT301 Applicable Models 6555A 6551A 6552A 6553A 6554A 6555A 6651A 6652A 6653A 6654A 6655A 65 6651 65 6652 65 6653 65 6654 65 6655 65 6651 65 6652 65 6653 65 6654 65 6655 Agilent Part No 06555 61001 06551 80001 06552 80014 06553 80001 06554 80002 06555 80001 06651 80001 06652 80014 06653 80001 06654 80002 06655 80001 5063 2304 0960 0912 5040 1665 5063 3407 3101 3088 06651 61022 06652 61022 06653 61022 06654 61002 06655 61022 06651 61023 06652 61023 06653 61023 06654 61023 06655 61023 06652 60006 5062 3704 5041 8819 5041 8820 5001 6748 5040 1703 0515 0413 5001 6771 06652 00004 06652 00007 06652 00008 06652 20001 06652 60001 06652 60005 1400 0493 1400 0528 Description Front Panel Board Initialized amp Tested N
81. 2 All capacitor values are in microfarads unless otherwise specified Figure 6 4 Front Panel Board Schematic Diagram sheet 2 of 2 L WES Do ooogdooooooooo oooood o Sale d lt gt 1 m m COR 5 wn n 0504 fin Oe ds n O H O Q Holooooooooooopoooooo H 0 _ 501 cH D o bl of R501 T z 0 o i o 0 o 0 o logo D o o o of o 2 on o lo as o gt 5 Qo 2 o 6 0 o b lofo Slo o lol 0 lolo no o i o 512 o 309 fe R510760 509 450 515 510 o Ded Gold j aid q 2 058 950 0009 600 5610 III 000 16885 o RG87Pb o 656069 C505 0 9 O G C507r o o 5641 oj 6 2651 0 5641 E R507 D648 661 0640 5506 epesi o 2 9999909 R658 8508 6 0650 8 cabal 9 O PIP P TTE E Rede Rea oo pers lo CHR71zb0 0 6 ocJR228 o o 2 c3 tz S 722 2515 2527 I 91525415 2 8 0042522229999900 Rett R622 56 Resio O LI 2 29 6999 99 0 2 Z H G C202 9 IN No G R612lH G R624 9 N WO O IO 54082210
82. 26 mA mA Tour 26 mA High Current 25 A Tout 24 9375 A A 25 0625 A Front Panel Display Readback Tout 63 5 mA mA 63 5 mA Current Sink 5 A Display Readback Lai 61 5 mA mA Li 61 5 mA PARD Ripple and Noise RMS 0 mA 10 mA Load Effect La 1mA mA Tou 1 mA Source Effect La 1 mA mA Tour 1 mA Enter your test results in this column 26 Verification Table 2 12 Performance Test Record for Agilent Model 6553 or 6653A MODEL Agilent Report No Date Test Description Minimum Results Maximum Spec 5 Spec Constant Voltage Tests Voltage Programming and Readback Low Voltage 0 V Vout 15 mV mV 15 mV Front Panel Display Readback Vout 25 mV mV Vout 25 mV High Voltage 35 V Vout 34 964 V V 35 036 V Front Panel Display Readback Vout 49 5 mV mV Vout 49 5 mV Load Effect Vou 3 mV mV Vou 3 mV Source Effect Vout 1 mV mV Vou 1 mV PARD Ripple and Noise Peak to Peak 0 mV 4 RMS 0 LV 400 uV Transient Response Time 0 mV 35 mV at 100 us Constant Current Tests Current Programming and Readback Low Current 0 A I 13 mA mA 13 mA Front Panel Display Readback La 15 mA mA Tou 15 mA High Current 15 A Tout 14 9645 A A 15 0355 A Front Panel Display Readback Tour 37 5 mA mA Tour 37 5 mA Current Sink 3 A Display Readback Li 34 5 mA mA 34 5 mA PARD Ripple and Noise RMS 0 mA 5mA Load Effect Tou 0
83. 3 ON THE GPIB BOARD ALSO CHECK 12 MHz SIGNAL A2Uti4 6 CHECK CABLE W10 CHECK CABLE W10 CHECK A2u101 CHECK 2 107 C108 114 Y CHECK FOR ANY ACTIVITY PULSES ON DATA ADDRESS UNES TO INDICATE THAT PRIMARY uP 20114 IS OPERATING CHECK 2V114 UHG U106 108 U120 USE TO CHECK FOR LINES SHORTED TO 5V OR COMMON IF NO SHORTED LINES ARE FOUND REPLACE A2U114 SEE NOTE 3 CHECK FOR THE PRESENCE OF CLOCK PULSES AT THE FOLLOWING CIRCUIT POINTS ON THE A2 GPIB 80ARD A TO SHEET 2 Figure 3 13 Serial Down Troubleshooting Sheet 1 of 2 60 Troubleshooting EM CLK PULSES AT CHECK R2U114 0119 ReU119 1 YES PULSES AT CHECK R2U112 0117 1119 PeU11g 127 YES CHECK FOR THE PRESENCE OF PULSES THE FOLLOWING CIRCUIT POINTS ON THE GPIB BOARD SEE FIG 6 3 URT PULSES AT CHECK FeU128 Ull2 Reui128 157 YES PTX PULSES RT Reul12 6 CHECK AUZ Ull9 YES FPTX PULSES RT CHECK 18 R2U119 187 R2U1 12 2 CHECK 20112 Figure 3 13 Serial Down Troubleshooting Sheet 2 of 2 Troubleshooting 61 START SECONDARY DOWN DISPLAY READS SECONDARY ye TURN OFF SUPPLY AND REMOVE System TOP COVER BYPASS ISOLATOR SUPPLY BOARD BY UNPLUGGING CABLE FROM 2801 AND PLUGGING IT AU INTO AYSO YES DISPLAY READS SECONDARY TURN OFF SUPPLY AND REMOVE TOP COVER TURN ON SUPPLY AND
84. 384 Resistor 4 64K 1 R115 117 0699 1360 Resistor 46 4 1 R118 0699 1318 Resistor 1K 1 R119 0699 1327 Resistor IMQ 1 R120 122 0699 1384 Resistor 4 64K 1 R123 0699 1431 Resistor 464Q 1 R130 133 0699 1384 Resistor 4 64K 1 R134 0699 1432 Resistor 5110 5 R135 136 0699 1384 Resistor 4 64K 1 R137 0699 1415 Resistor 100Q 1 R138 0699 1432 Resistor 5110 5 R139 142 0699 1384 Resistor 4 64K 1 R143 0699 1330 Resistor 100K 1 R144 0699 1415 Resistor 1000 1 128 Replaceable Parts Table 5 9A A2 GPIB Board Replaceable Parts for 664 amp 665xA Only continued Ref Desig TB101 0101 0106 0108 0109 U110 111 0112 0113 0114 0115 0116 0117 0118 0119 0120 0121 0122 101 102 103 104 101 101 Agilent Part No 0360 2312 1826 2801 5080 2273 1818 4859 1820 5548 1990 0444 1820 7680 1990 0543 1820 6721 1820 6176 1820 4264 1820 2549 1820 4185 5080 2274 5080 2275 1820 0430 1820 6814 1902 1634 1902 1802 1902 1609 1258 0209 0410 4055 1205 0758 0340 1277 0535 0031 0515 0642 0515 0911 Description Terminal block digital control IC MC3423PI IC ROM GPIB IC MCM 6164C55 IC interface IC Opto isolator IC 68B50 IC Opto isolator IC MPU IC GPIB transceiver IC SN74ALS573BN IC 8291A IC interface IC GAL programmed GPIB IC GAL programmed GPIB IC LM309K IC GPIB chip Diode zener 18 2V 5 Diode zener 11V 596 Diode zener 6 19V 5 Jumper Crystal oscillator 12 00
85. 4 65 6642A 5060 3321 Regulator Assembly HS 1826 0106 65 6642A 5060 3320 Regulator Assembly HS 1826 0122 1854 0477 XSTR NPN 2N2222A 5060 3245 Regulator Assembly HS 65 6641A 65 6642A 0811 3849 Resistor 0 25 5 3W 65 6643A 0811 3848 Resistor 0 39 5 3W 65 6644A 0811 3847 Resistor 0 66 1 3W 65 6645A 0811 1220 Resistor 1 5 5 3W PW 0698 3430 Resistor 21 5 1 65 6641 A 65 6644A 0698 3441 Resistor 215 1 125W 0757 0280 Resistor 1K 1 125W 65 6641A 65 6642A 0811 3849 Resistor 0 25 5 3W 65 6643A 0811 3848 Resistor 0 39 5 3W 65 6644A 0811 3847 Resistor 0 66 1 3W 65 6645A 0811 1220 Resistor 1 5 5 3W PW 0698 3430 Resistor 21 5 1 65 6641 A 65 6644A 0698 3441 Resistor 215 1 125W 0757 0280 Resistor IK 1 125W 65 6641A 0698 8959 Resistor 619K 1 65 6642A 0698 8959 Resistor 619K 1 65 6643A 0757 0481 Resistor 475K 1 65 6644A 0757 0481 Resistor 475K 1 65 6644A 0699 0070 Resistor 3 16M 1 65 6641A 65 6642A 0811 3849 Resistor 0 25 5 3W 65 6643A 0811 3848 Resistor 0 39 5 3W 65 6644A 0811 3847 Resistor 0 66 1 3W 65 6645A 0811 1220 Resistor 1 5 5 3W PW 0757 0316 Resistor 42 2 1 0698 3441 Resistor 215 1 125W 0698 0085 Resistor 2 61K 1 65 6641 65 6643 0698 3454 Resistor 215K 1 65 6644A 65 6645A 0757 0466 Resistor 110K 1 Replaceable Parts 103 Table 5 5 Parts List 200 Watt 1 Board for Agilent Models 654xA and 664 continued Desig 65 6641A 65 6642A 0811 3849 Resistor 0 25 5 3W 65 6643A 0811 3848 Res
86. 4 0160 5422 Capacitor 047 uF 2096 C505 65 6651 65 6655 0160 4129 Capacitor 1 uF 35V C506 0160 4801 Capacitor 100 pF 5 C507 0160 5422 Capacitor 047 uF 2096 C509 0160 5422 Capacitor 047 uF 2096 C510 0160 4801 Capacitor 100 pF 596 C512 0160 5422 Capacitor 047 uF 2096 C513 0160 4801 Capacitor 100 pF 5 C515 0160 5422 Capacitor 047 uF 2096 C516 0160 4801 Capacitor 100 pF 5 Replaceable Parts 117 Table 5 7 Parts List For 500 Watt 1 Board for 655 amp 665xA continued Desig C517 518 0160 5422 Capacitor 047 uF 20 C519 65 6651 65 6655 0180 4129 Capacitor 1 uF 35V C520 522 0160 5098 Capacitor 22 uF 10 C523 Not used C524 0160 5422 Capacitor 047 uF 20 C600 0160 4834 Capacitor 047 uF 10 100V C602 0180 3458 Capacitor 4700 uF 50V C603 0180 3298 Capacitor 2200 uF 50V C604 606 65 665 1A 65 6655A 0180 4129 Capacitor 1 uF 35V C605 0180 0197 Capacitor 2 2 uF 20V TA C610 0160 5469 Capacitor 1 uF 10 50 C611 0160 4808 Capacitor 470 pF 596 C612 0160 4835 Capacitor 1 uF 1096 50V C613 614 65 6651A 0160 4835 Capacitor 0 1 uF 10 50V 65 6652A 0160 5422 Capacitor 0 047 uF 2096 65 6653A 0160 5166 Capacitor 0 015 uF 2096 65 6654A 0160 5409 Capacitor 3000 pF 596 C615 618 0160 5422 Capacitor 0 047 uF 2096 C619 65 6651A 65 6653A 0160 4791 Capacitor 10 pF 5 100V 65 6652A 0160 4795 Capacitor 4 7 pF 65 6654 65 6655 0160 4789 Capacitor 15 pF 5 100V Not used 0160 4821 Capacitor 1200 pF 5 65 6651A 65 6653A 0160 4791 Cap
87. 430 Resistor 21 5 1 65 6641 A 65 6644A 0698 3441 Resistor 215 1 125W 0757 0280 Resistor 1K 1 125W 0757 0465 Resistor 100 1 65 6641A 65 6642A 0811 3849 Resistor 0 25 5 3W 65 6643A 0811 3848 Resistor 0 39 5 3W 65 6644A 0811 3847 Resistor 0 66 1 3W 65 6645A 0811 1220 Resistor 1 5 5 3W PW 104 Replaceable Parts Table 5 5 Parts List 200 Watt A1 Board for Agilent Models 654xA and 664xA continued Desig 0698 3430 Resistor 21 5 1 65 6641 65 6644 0698 3441 Resistor 215 1 125W 0757 0280 Resistor 1K 1 125W 65 6641A 65 6642A 0757 0463 Resistor 82 5K 1 65 6644A 0757 0463 Resistor 82 5K 1 65 6643A 0757 0465 Resistor 100 1 65 6645A 0757 0467 Resistor 121K 1 0683 0475 Resistor 4 7 5 25W 65 6641A 0811 3849 Resistor 0 25 5 3W 65 6641A 0811 3849 Resistor 0 25 5 3W 65 6641A 0811 3849 Resistor 0 25 5 3W 65 6641A 0811 3849 Resistor 0 25 5 3W 65 6641A 0813 0050 Resistor 100 5 3W PW 65 6642A 0811 1799 Resistor 390 5 3W PW 65 6643A 0811 0944 Resistor 800 5 10W 65 6644A 0811 1913 Resistor 1 5K 5 10W 65 6645A 0811 1914 Resistor 5K 5 10W PW 65 6641A 0813 0050 Resistor 100 5 3W PW 65 6642A 0811 1799 Resistor 390 5 3W PW 65 6643 65 6645 0811 1799 Resistor 390 5 3W PW 0757 0280 Resistor 1K 1 125W 65 6645A 0811 1914 Resistor 5K 5 10W PW 65 6645A 8159 0005 Resistor Zero Ohms 65 6641A 0757 0395 Resistor 56 2 1 65 6642A 0757 0403 Resistor 121 1 125W 65 6643A 0757 0404 Resistor 130 1 125W 65
88. 49 5060 3315 5060 3314 1854 0989 1855 0849 5060 3315 5060 3314 1854 0989 1854 1162 5060 3231 5060 3250 1854 0989 1855 0849 5060 3315 5060 3314 0811 3849 0811 3848 0811 3847 0811 1220 0698 3430 8159 0005 0698 3441 0757 0280 0811 3849 0811 3848 0811 3487 0811 1220 0698 3430 8159 0005 0698 3441 Description Capacitor 100pF 5 100V Capacitor 0 luF 10 50V Capacitor 100pF 5 100V Capacitor 0 400V Capacitor 220pF 5 Diode IN4150 Fuse 125AM 125V Fuse 5AM 125V Fuse submin 10AM 125V Resistor 0 Ohms Resistor 0 Ohms Phone recept control sigs Connector Util power Transistor NPN SI MOSFET N Chan Assy includes FET 1855 0725 and HS Assy includes FET 1855 0641 and HS Not used Transistor NPN SI MOSFET N Chan Assy includes FET 1855 0725 and HS Assy includes FET 1855 0641 and HS Not used Transistor NPN SI Transistor NPN SI Assy includes XSTR 1853 0497 and HS Assy includes XSTR 1853 0652 and HS Transistor NPN SI MOSFET N Chan Assy includes FET 1855 0725 and HS Assy includes FET 1853 0641 and HS Not used Resistor 25 590 3W Resistor 39 5 3W Resistor 66 1 3W Resistor 1 5 5 3W Resistor 21 5 196 Resistor 0 Ohms Resistor 215 196 Not used Resistor 1K 1 125W Not used Resistor 25 5 3W Resistor 39 5 3W Resistor 66 1 3W Resistor 1 5 5 3W Resistor 21 5 1 Resistor 0 Ohms Resistor 215 1 125W Not used Table 5 11 A4A1
89. 5 5 T 15081 gt DCO DBO 55 id T is 5 er x 16 13 22K 1 19 DAC REFERENCE V 15 SECONDARY NTERF ACE CUPROG 0 10U CCPROG 0 10U Figure 6 5 A1 Main Board Secondary Interface amp CV CC Readback DACs Schematic Diagram for Models sheet 3 RIGHT TUNNEL BD cefozodoo 2505 R331 R330 9CCC6 pool B LI O 1500 0506 02504 0 222 6C O R O LEFT TUNNEI 3D C o9 4201 N O CHOO R230 EX I B n c c2072 o04C206 US E 565655 Figure 6 6 Left Right Tunnel Board Assembly Diagram and Test Points for 655xA amp 665xA Models Onlv RAIL RAIL 4202 1 J201 GATED 15U 6 159 4 F201 125A GATED 15V
90. 5 C803 0180 3167 Capacitor 1000uF 25 V C804 0180 4129 Capacitor luf 35 V C805 0160 5422 Capacitor 0 047uF 20 C806 0160 5422 Capacitor 0 047uF 20 D800 1901 0731 Diode power rectifier D801 1901 0731 Diode power rectifier 0802 1901 0731 Diode power rectifier D803 1901 0731 Diode power rectifier F800 2110 0951 Fuse subminature 5 AT 125V J800 801 1251 8184 Receptacle modular phone J802 1251 4926 Connector test point header J803 1251 4245 Connector 2 pin male R800 0757 0401 Resistor 1000 1 0 125 W R801 0698 3155 Resistor 4 64K 1 R802 0698 3155 Resistor 4 64K 1 R803 0698 0082 Resistor 4640 1 0 125 W R804 0698 0082 Resistor 4640 1 0 125 W R805 0698 3155 Resistor 4 64K 1 R806 0698 3155 Resistor 4 64K 1 R807 0698 3155 Resistor 4 64K 1 U800 1990 0543 IC Opto isolator U801 1990 0444 IC Opto isolator U802 1990 0444 IC Opto isolator U803 1820 1201 IC SN74LS08N U804 1820 1438 IC SN74LS257N U805 1826 0122 IC UA7805UC 5060 2948 Heat sink assembly T 220 U805 1205 0282 Heat sink Replaceable Parts 127 Table 5 9 2 GPIB Board Replaceable Parts for 664 amp 665 surface mount This table applies to units identified on the title page of this manual Refer to Backdating for additional units Ref Desig Agilent Part No Description C012 105 0160 6100 Capacitor 1000pF 100V C106 0180 3975 Capacitor 2 2uF 20 V C107 108 0160 5961 Capacitor 22pF 5 100 V C109
91. 5 6645A 0757 0470 Resistor 162K 1 0757 0465 Resistor 100 1 65 6641A 0698 3455 Resistor 261K 1 65 6642A 65 6643A 0698 8827 Resistor 1M 1 125W 65 6644A 65 6645A 0699 0070 Resistor 3 16M 1 0757 0419 Resistor 681 1 125W 0757 0401 Resistor 100 1 125W 0698 0084 Resistor 2 15K 1 6541A 6641A 0757 0316 Resistor 42 2 1 65 6642 65 6644 0757 0284 Resistor 150 1 125W 6541A 6641A 0757 0316 Resistor 42 2 1 65 6642 65 6645 0757 0284 Resistor 150 1 125W 0698 3155 Resistor 4 64K 1 0698 8827 Resistor 1M 1 125W 65 6641A 0757 0465 Resistor 100K 1 65 6642A 6543A 0698 3459 Resistor 383K 1 6643A 65 6644A 0698 8826 Resistor 825K 1 6645A 0698 8827 Resistor 1M 1 125W 0757 0280 Resistor 1K 1 125W 0698 0084 Resistor 2 15 1 0698 3441 Resistor 215 1 125W 0698 3441 Resistor 215 1 125W 0698 3153 Resistor 3 83K 1 0757 0280 Resistor 1K 1 125W 0757 0280 Resistor 1K 1 125W 0698 3260 Resistor 464K 1 0698 3260 Resistor 464K 1 0698 3155 Resistor 4 64K 1 0698 3153 Resistor 3 83K 1 0757 0442 Resistor 10 1 125W 0757 0449 Resistor 20K 1 125W 0757 0442 Resistor 10 1 125W 0698 0084 Resistor 2 15K 1 0698 3260 Resistor 464K 1 0698 3155 Resistor 4 64K 1 0698 3155 Resistor 4 64K 1 0757 0442 Resistor 10 1 125W Replaceable Parts 111 Table 5 5 Parts List 200 Watt A1 Board for Agilent Models 654xA and 664xA continued Desig 0698 3155 Resistor 4 64K 1 0698 3155 Resistor 4 64K 1 0757
92. 6 19 pan head ref Q201 203 205 207 Washer lk hlcl ref Q201 203 205 207 Replaceable Parts 133 Table 5 12 A4A2 A4A4 Right Tunnel Board Parts List for 500 Watt 655 amp 665xA Models Reference Applicable Models Agilent Part No Desig C301 304 C305 306 C307 C309 F301 303 F301 303 F304 307 J300 J301 J302 Q301 Q302 Q303 Q304 Q305 Q306 Q307 Q308 R301 65 6641 A 65 6645A 65 665 1A 65 6655A 65 6651 65 6652 65 6655 65 6651 65 6654 6655 65 6651A 65 6652 65 6653A 65 6654 6655 65 6651 65 6654 65 6655 65 6651A 65 6652 65 6653 65 6654 65 6655 65 6651 65 6654 6655 65 6651 65 6652 65 6653A 65 6654 6655 65 6651 65 6654 65 6655 65 6651A 65 6652A 65 6653A 65 6654A 65 6655A 65 6651A 65 6652A 65 6653A 65 6654A 65 6655A 65 6651 A 65 6654A 65 6655A 65 6651 A 65 6654A 65 6655A 65 665 1A 65 6653A 65 6654A 65 6655A 65 6651A 65 6652A 65 6653A 65 6654A 65 6655A 65 6651 A 65 6654A 65 6655A 65 6651 A 65 6654A 65 6655A 134 Replaceable Parts 0160 4801 0160 4835 0160 4801 0160 6806 2110 0671 2110 0716 2110 0713 8159 0005 1251 4245 1251 8184 1251 4781 1854 0989 1855 0840 5060 3315 5060 33 14 1854 0989 1855 0840 5060 3315 5060 3314 Not used 1854 0989 1855 0840 5060 3315 5060 3314 1854 0989 1855 0840 5060 3315 5060 33 14 0811 3849 0811 3848 0811 3847 0811 1220 0698 3430 8159 0005 0698 3441 0757 02
93. 60 5422 Capacitor 047UF 20 0160 4805 Capacitor 47PF 5 100 0160 4805 Capacitor 47PF 5 100 0160 5422 Capacitor 047UF 20 0180 4129 Capacitor IUF 35V 0160 4801 Capacitor 100 5 0160 5422 Capacitor 047UF 20 0160 5422 Capacitor 047UF 20 0160 4801 Capacitor 100 5 0160 5422 Capacitor 047UF 20 0160 4801 Capacitor 100 5 0160 5422 Capacitor 047UF 20 0160 4801 Capacitor 100 5 0160 5422 Capacitor 047UF 20 0160 5422 Capacitor 047UF 20 0180 4129 Capacitor IUF 35V 0160 5098 Capacitor 22UF 1096 0160 5098 Capacitor 22UF 1096 0160 5098 Capacitor 22UF 1096 98 Replaceable Parts Table 5 5 Parts List 200 Watt A1 Board for Agilent Models 654 and 664xA continued Desig 65 6641A 0160 5422 Capacitor 047UF 20 0160 5422 Capacitor 047UF 20 0180 3298 Capacitor 2200UF 50V 0180 3298 Capacitor 2200UF 50V 0180 4129 Capacitor 35V 0180 0197 Capacitor 2 2UF 20V TA 0180 4129 Capacitor IUF 35V 0160 5469 Capacitor IUF 10 50V 0160 4808 Capacitor 470PF 5 0160 4835 Capacitor IUF 10 50V 65 6641A 0160 4835 Capacitor IUF 1096 50V 65 6642A 0160 4834 Capacitor 047UF 1096 65 6643A 0160 5166 Capacitor 015UF 20 65 6644 65 6645A 0160 5409 Capacitor 3000PF 596 65 6641A 0160 4835 Capacitor IUF 10 50V 65 6642A 0160 4834 Capacitor 047UF 1096 65 6643A 0160 5166 Capacitor 015UF 20 65 6644A 65 6645A 0160 5409 Capacitor 3000PF 596 0160 5422 Capacitor 047UF 20 65 6641A 0160 5422 Capacitor 047UF 20
94. 6644A 0698 3486 Resistor 232 1 125W 65 6645A 0757 0413 Resistor 392 1 125W 0698 8827 Resistor 1M 1 125W 65 6645A 8159 0005 Resistor Zero Ohms 65 6645A 8159 0005 Resistor Zero Ohms 0698 3456 Resistor 287K 1 1810 0305 Network Resistor SIP 0757 0458 Resistor 51 1K 1 0757 0428 Resistor 1 62K 1 0699 1212 Resistor 19K 1 0698 6392 Resistor 22K 1 125W 0757 0442 Resistor 10 1 125W 0757 0401 Resistor 100 1 125W 0757 0401 Resistor 100 1 125W 0757 0401 Resistor 100 1 125W 0698 3456 Resistor 287K 1 0757 0465 Resistor 100K 1 0757 0465 Resistor 100K 1 0757 0462 Resistor 75K 1 125W 0698 0084 Resistor 2 15K 1 0698 0084 Resistor 2 15K 1 Replaceable Parts 105 Table 5 5 Parts List 200 Watt A1 Board for Agilent Models 654xA and 664xA continued Desig 0698 0084 Resistor 2 15K 1 0698 3155 Resistor 4 64K 1 65 6645A 8159 0005 Resistor Zero Ohms 65 6641A 8159 0005 Resistor Zero Ohms 65 6643A 65 6645A 8159 0005 Resistor Zero Ohms 65 6641 A 65 6645A 8159 0005 Resistor Zero Ohms 65 6641 A 65 6645A 8159 0005 Resistor Zero Ohms 0698 6360 Resistor 10K 1 0698 6343 Resistor 9K 1 125W 0757 0442 Resistor 10 1 125W 0698 6630 Resistor 20K 1 0698 3156 Resistor 14 7K 1 0698 3156 Resistor 14 7K 1 0683 2255 Resistor 2 2M 5 25W 0757 0279 Resistor 3 16K 1 0757 0441 Resistor 8 25K 1 0698 0082 Resistor 464 1 125W 0757 0449 Resistor 20K 1 125W 0757 0449 Resistor 20K 1 125W 0699 2246 Resistor 25K
95. 665 Desig 65 6651A 65 6652A 0160 5422 Capacitor 047 uF 20 65 6653A 65 6655A Not used 65 6651A 65 6652A Not used 65 6654A 65 6655A Not used 65 6653A 0160 6803 Capacitor 047 250V C405 406 65 6651A 0180 4321 Capacitor 39000 uF 25V 65 6652A 0160 4264 Capacitor 18000 uF 50V 65 6653A 0180 4272 Capacitor 10000 uF 80V 65 6654A 0180 4263 Capacitor 4000 uF 125V 65 6655A 0180 4311 Capacitor 1200 uF 250V 65 6651A 0180 4321 Capacitor 39000 uF 25V 65 6652A 0160 4264 Capacitor 18000 uF 50V 65 6653A 0180 4272 Capacitor 10000 uF 80V 65 6654A 65 6655A Not used C408 409 65 6651A 0180 4321 Capacitor 39000 uF 25V 65 6652A 65 6655A Not used C411 65 6651A 65 6652A 0160 5422 Capacitor 047 uF 20 65 6653A 65 6655A Not used C412 65 6651A 65 6652A Not used 65 6654A 65 6655A Not used 65 6653A 0160 6803 Capacitor 047 uF 250V 65 6652A 65 6654A Not used 65 6651A 65 6653A 0160 5469 Capacitor luF 10 50V 65 6655A 65 6654A 0160 5101 Capacitor 1 uF 10 C414 415 0160 5422 Capacitor 047 uF 20 C416 65 6651A 0180 4321 Capacitor 39000 uF 25V 65 6652A 65 6653A 0180 3963 Capacitor 17000 uF 16V 65 6654A Not used 65 665 1A 65 6653A Not Used 65 6654A 65 6655A 0180 3497 Capacitor 6800 uF 16V 65 665 1A 65 6653A Not Used 65 6654A 0160 0168 Capacitor 1 uF 10 65 6655A 0160 4065 Capacitor 1 uF 10 C450 451 0160 4281 Capacitor 2200 pF 20 C452 0160 4962 Capacitor 1 0 uF 20 C501 0160 5422 Capacitor 047 uF 20 C502 503 0160 4805 Capacitor 47 pF 596 100V C50
96. 6651 A 65 6654A 65 6655A 65 6651 A 65 6654A 6655 65 6651A 65 6652A 65 6654A 65 6655A 6653 65 6651A 65 6652A 6653 6654 6655 65 6651 A 65 6654A 65 6655A 65 6651 A 65 6654A 6655 65 6651A 65 6652A 65 6654A 65 6655A 6653 65 665 1A 6652 55 65 665 1 A 65 6654A 65 6655A 0757 0280 0698 3454 0757 0470 0811 3849 0811 3848 0811 3847 0811 1220 0698 3430 8159 0005 0698 3441 0757 0280 0757 0465 0757 0470 0811 3849 0811 3848 0811 3847 0811 1220 0698 3430 8159 0005 0698 3441 0757 0280 0757 0463 0757 0465 0683 0475 0811 3849 0698 3430 1826 0962 1200 1158 0515 0064 2190 0584 Description Resistor 1K 1 125W Resistor 215K 1 Resistor 162K 1 Resistor 0 25 5 3W Resistor 0 39 5 3W Resistor 0 66 1 3W Resistor 1 5 5 3W Resistor 21 5 1 Resistor 0 Ohms Resistor 215 1 125W Not used Resistor 1K 1 125W Resistor 162K 1 Resistor 0 25 5 3W Resistor 0 39 5 3W Resistor 0 66 1 3W Resistor 1 5 5 3W Resistor 21 5 1 Resistor 0 Ohms Resistor 215 1 125W Not used Resistor 1K 1 125W Resistor 82 5K 1 Resistor 100 Resistor 4 7 5 25W Resistor 0 25 5 3W Not used Resistor 21 5 1 IC 412 Transistor socket ref Q301 303 305 307 Screw mach M3 x 5 16mm lg pan head ref Q301 303 305 307 Washer lk ref Q301 303 305 307 Replaceable Parts 135 Diagrams Introduction This chapter contains various diagrams for use in troubleshooting and maintaining the
97. 6x54 820 830 840 850 860 870 DATA 64 16 35 61 425 0 83 0 393 127 9 214 0 DATA 99 1 10 43 78 2 66 0 83 255 20 10 DATA 6554 60 81 168 405 41 168 18 1768 5 255 0 0 DATA 16 6554 0 20 180 20 180 156 37 26 DATA 186 15 20 0 4 880 Eprom_data_6x55 890 900 910 920 930 940 950 960 970 980 990 1000 1010 1020 DATA 32 42 16 6 122 85 0 82 0 882 98 136 86 4 095 0 DATA 100 1 5 313 117 38 132 0 82 255 20 10 DATA 6555 30 41 168 18 912 18 168 18 1768 5 255 0 0 DATA 16 6555 0 20 180 20 180 156 37 26 DATA 186 15 20 0 4 EEPROM data for 6545A and 6645A EEPROM data for 6551A and 6651A EEPROM data for 6552A and 6652A EEPROM data for 6553A and 6653A EEPROM data for 6554A and 6654A EEPROM data for 6555A and 6655A INPUT Input Power Supply model number Example 6641A Model Model TRIM UPC Model CLEAR SCREEN RESTORE Eprom_data_addr FOR I 1 TO 45 READ Figure 3 17 Initialization and Factory Preset Replacement Program Listing Sheet 2 of 6 68 Troubleshooting 1030 1040 1050 1060 1070 1080 1090 1100 1110 1120 1130 1140 1150 1160 1170 1180 1190 1200 1210 1220 1230 1240 1250 1260 1270 1280 1290 1300 1310 1320 1330 1340 1350 1360 1370 1380 1390 1400 1410 1420 1430 1440 1450 1460 1470 1480 1490 1500 1510 1520 NEXT I RESTORE Eprom_data_len FOR I 1 45 READ Length I NEXT I I SELECT Model
98. 731 Diode Power Rectifier 1901 0731 Diode Power Rectifier 1901 0731 Diode Power Rectifier 1901 0731 Diode Power Rectifier 100 Replaceable Parts Table 5 5 Parts List 200 Watt 1 Main Board for Agilent Models 654xA and 664xA continued Desig 1901 1098 Diode 1N4150 1901 1098 Diode 1N4150 1901 1098 Diode 1N4150 1901 0880 Diode General Purpose 1901 0880 Diode General Purpose 1901 0880 Diode General Purpose 1901 0880 Diode General Purpose 1901 0880 Diode General Purpose 1901 1098 Diode 1N4150 1901 1098 Diode 1N4150 1901 1098 Diode 1N4150 1901 1098 Diode 1N4150 1901 1098 Diode 1N4150 1901 0880 Diode General Purpose 1901 0880 Diode General Purpose 1901 0880 Diode General Purpose 1901 0880 Diode General Purpose 1901 0880 Diode General Purpose 1901 0880 Diode General Purpose 1901 0880 Diode General Purpose 65 6641A 1901 0880 Diode General Purpose 65 6641A 1901 0880 Diode General Purpose 65 6641A 1901 0880 Diode General Purpose 65 6641A 1901 1098 Diode 1N4150 65 6641A 1901 1098 Diode 1N4150 65 6641A 1901 1098 Diode 1N4150 65 6641A 1901 1098 Diode 1N4150 65 6641A 1901 1098 Diode 1N4150 65 6645A 1901 0731 Diode Power Rectifier 65 6641A 1901 1127 Rectifier 65 6642A 65 6644A 1901 1383 Rectifier P O 5060 3376 65 6645A 1901 1130 Rectifier P O 06645 60002 8159 0005 Resistor Zero Ohms 8159 0005 Resistor Zero Ohms 8159 0005 Resistor Zero Ohms 8159 0005 Resistor Zero Ohms 8159 0005 Resistor Zero Ohms 8159 0005 Resistor Zero Ohms
99. 8 W P N 0698 8816 Qty 1 Remove Capacitor C708 0 01 uf 100 V 10 ceramic P N 0160 4832 Qty 1 Remove Capacitor C646 47 pf 100 V 5 ceramic P N 0160 4805 Qty 1 In Table 5 9 Remove standoff hex REF GPIB connector P N 0380 0643 Qty 2 Remove Lock washer M4 REF GPIB Connector P N 2190 0586 Remove rivet REF GPIB Clevis P N 0361 0276 Change Rear panel from P N 5001 6742 Qty 1 to P N 06652 00002 Appendix A 171 15 16 17 18 19 20 21 22 23 24 25 Change Connector 101 from P N 1252 2047 to P N 1252 0268 Change Screw Qty 2 M3 x 0 5 mm P N 0515 0911 from REF Clevis to REF J101 Change Nut M3 hex w lock washer from REF J101 to P N 0535 0031 In Tables 5 5 5 11 and 5 12 Change Q201 203 207 301 303 305 and 307 to Agilent p n 1855 0840 These units have a through hole A2 GPIB board assembly The through hole assembly is the same as the newer surface mount SMT assembly functionally and electrically The only changes are in the size of the assembly the through hole components and the pin out numbers of some of the through hole components The through hole board GPIB assembly is documented in Table 5 9B In Table 5 8 Change F800 to 5A Agilent p n 2110 0699 In Table 5 9 Change U121 to LM309K Agilent p n 1820 0430 In Tables 5 5 5 11
100. 80 0698 3459 0811 3849 0811 3848 0811 3847 0811 1220 0698 3430 8159 0005 0698 3441 Description Capacitor 100 pF 5 Capacitor luF 10 50V Capacitor 100 PF 5 Capacitor luF 400V Fuse 125AM 125V Fuse 5AM 125V Fuse 10AM 125V Resistor 0 Ohms Conn 2 pin ref therm assy RT301 Phone recept control Conn Util power Transistor NPN SI MOSFET N Chan Assy includes FET 1855 0725 and HS Assy includes FET 1855 0641and HS Not used Transistor NPN SI MOSFET N Chan Assy includes FET 1855 0725 and HS Assy includes FET 1855 0641 and HS Transistor NPN SI MOS N Chan Assy includes FET 1855 0725 and HS Assy includes FET 1855 0641 and HS Not used Transistor NPN SI MOSFET N Chan Assy includes FET 1855 0725and HS Assy includes FET 1855 0641 and HS Not used Resistor 25 5 3W Resistor 39 5 3W Resistor 66 1 3W Resistor 1 5 5 3W Resistor 21 5 1 Resistor 0 Ohms Resistor 215 1 125W Not used Resistor 1k 1 125W Not used Resistor 383K 1 Resistor 0 25 5 3W Resistor 0 39 5 3W Resistor 0 661 3W Resistor 1 5 5 3W Resistor 21 5 1 Resistor 0 Ohms Resistor 215 1 125W Not used Table 5 12 A4A2 A4A4 Right Tunnel Board Parts List for 500 Watt 655xA amp 665xA Models continued Reference Applicable Models Agilent Part No Desig R323 R325 328 R329 332 U301 302 65 6651A 65 6652A 65 6653A 65 6654A 65 6655A 65 6651A 65 6652A 6653 6654 6655 65
101. 8816 Resistor 2 15 1 65 6652A 65 6654A Not used R770 771 0757 0442 Resistor 10 1 125W R772 0757 0470 Resistor 162K 1 R773 0698 6376 Resistor 200K 1 R774 0699 1212 Resistor 19K 1 R775 0698 6630 Resistor 20K 1 R778 779 0811 2201 Resistor 270 5 2W PW R781 0686 2225 Resistor 2 2K 5 5W R783 784 65 665 1A 65 6653A Not used R786 788 R783 784 65 6654A 65 6655A 8159 0005 Resistor 0 Ohms R786 788 R785 65 6651A 0757 0405 Resistor 162 1 65 6652A 65 6655A 0757 0397 Resistor 68 1 1 R790 Not used R789 791 65 6651A Not used 65 6652A 65 6655A 8159 0005 Resistor 0 Ohms R792 Not used R793 65 665 1 A 65 6653A Not used 65 6654A 65 6655A 8159 0005 Resistor 0 Ohms Replaceable Parts 125 Table 5 7 Parts List For 500 Watt 1 Board for 655 amp 665xA continued Desig 0837 0412 Thermistor 3101 2894 Switch PB DPDT SENSE 5080 2150 IC Prgmd GAL 1826 1370 IC 365 Comp 5080 2250 IC Secondary uP 1826 1369 IC Volt Reg 1826 0346 IC Op Amp 1826 2187 IC DAC 1826 1896 IC Linear Amp 1826 2187 IC DAC 1826 1896 IC Linear Amp 1826 2187 IC DAC 1826 1896 IC Linear Amp 1826 1370 IC 365 Comp 5060 3321 HS Assy includes 1826 0106 5060 3320 HS Assy includes 1826 0122 5060 3229 HS Assy includes 1826 0124 1826 0962 IC Comp 412 1826 2252 IC OP270GP 1826 0962 IC Comp 412 1826 1533 IC 34072 1826 1370 IC 365 COMP 1826 0962 IC Comp 412 1990 0543 IC Opto Isolator 1826 0468 IC MC3423P1 1858 0047 IC Transistor Array 1858 0076 IC T
102. A4A3 Left Tunnel Board Parts for 500 Watt 655xA amp 665 Models continued Reference Applicable Models Agilent Part No Desig R217 R218 R219 R220 R221 R223 224 R225 228 R229 230 232 U201 202 65 6651A 65 6652A 65 6653A 65 6655A 65 6651A 65 6652A 65 6653A 65 6654A 65 6655A 65 6651 A 65 6654A 6655 65 6651A 65 6652A 65 6653A 65 6654A 65 6655A 65 6651 A 65 6654A 65 6655A 65 6651 A 65 6654A 6655 65 665 1A 65 6652A 65 6655A 65 6651 A 65 6654A 65 6655A 0757 0280 0698 8959 0757 0481 0811 3849 0811 3848 0811 3847 0811 1220 0757 0316 0698 3441 0698 0085 0698 3454 0757 0466 0811 3849 0811 3848 0811 3847 0811 1220 0698 3430 8159 0005 0698 3441 0757 0280 0698 3454 0757 0280 0683 0475 0811 3849 0698 3430 1826 0962 1200 1158 0340 0458 0515 0064 2190 0584 Description Resistor 1K 1 125W Resistor 619K 1 Resistor 475K 1 Resistor 25 5 3W Resistor 39 5 3W Resistor 66 1 3W Resistor 1 5 5 3W Resistor 42 2 1 Resistor 215 1 125 Resistor 2 61K 1 Resistor 215K 1 Resistor 110K 1 Resistor 25K 5 3W Resistor 39 5 3W Resistor 66 1 3W Resistor 1 5 5 3W Resistor 21 5 1 Resistor 0 Ohms Resistor 215 1 125W Not used Resistor 1K 1 125W Resistor 215K 1 Resistor 1K 1 125W Resistor 4 7 5 25W Resistor 25 5 3W Not used Not used Resistor 21 5 1 IC 412 comparator Transistor socket ref Q201 203 205 207 Insulator ref Q205 Screw mach x 5 1
103. Agilent power supplies Separate diagrams and or tables are provided to show model differences For wiring connections to external equipment refer to the Operating Manual Interconnections Figure 6 1 is the overall interconnection diagram The location of each circuit board in the supply chassis is given in Chapter 3 Figure 3 1 AC Input and Transformer Connections Figure 6 2 shows the AC power distribution and Figure 6 9 shows the transformer connectors and cable connections for the 500 watt models 655 amp 665 Circuit Board Schematics Table 6 1 describes the signal name abbreviations that appear on the schematics Each schematic has grid coordinates to help you locate signal origins and destinations Circuit names and test points are also given A list of the schematic and assembly drawings in this chapter are listed under Figures in the front matter to this manual Table 6 2 gives general notes that apply to the schematic diagrams Test point information is summarized in Table 6 3 Component Location Diagrams Diagrams showing the location of components and test points on each circuit board are shown on the page opposite the associated schematic s The Al Main Board s component location diagram has grid coordinates and a table to help you locate components Diagrams 137 Table 6 1 Signal Name Descriptions Signal Name 0 15 AD 0 AD 7 ANA 0 ANA 7 ATN BOVPROG BSTX CC CCPROG CV CVPROG D 0 D 7
104. BN W3 1258 0209 Jumper 13 WS 0811 3590 Jumper V19 5080 2261 Cable assembly LCD Display 9170 1497 Core shield bead FP Phone cable 1400 0493 Cable tie REF 2 front phone VI 0410 2159 Crystal 10 MHz 1200 1274 Socket IC U3 1200 1417 Socket IC U4 0340 1277 Insulator Y1 Replaceable Parts 131 Table 5 11 A4A1 A4A3 Left Tunnel Board Parts for 500 Watt 655 amp 665xA Models Reference Applicable Models Agilent Part No Desig C201 204 C205 206 C207 C208 209 C211 D201 F201 204 F201 204 F205 207 F208 J201 J202 Q201 Q202 Q203 Q204 Q205 Q206 Q207 Q208 R201 65 6641 A 65 6645A 65 665 1 A 65 6655A 6651A 65 6652A 65 6655A 65 665 1A 65 6654A 65 6655A 65 6651A 65 6652A 65 6653A 65 6654A 65 6655A 65 6651A 65 6654A 65 6655A 65 665 1A 65 6654A 65 6653A 65 6654A 65 6655A 65 665 1A 65 6654A 65 6655A 65 6651A 65 6652A 65 6653A 65 6655A 65 665 1A 65 6654A 65 6655A 65 6651A 65 6652A 65 6653A 65 6654A 65 6655A 65 6651A 65 6652A 65 6653A 65 6654A 65 6655A 65 6651 A 65 6654A 65 6655A 65 6651 A 65 6654A 6655 65 6651A 65 6652A 65 6653A 65 6654A 65 6655A 65 665 1A 65 6654A 65 6655A 65 665 1A 65 6654A 65 6655A 132 Replaceable Parts 0160 4801 0160 4835 0160 4801 0160 6806 0160 4812 1901 1098 2110 0671 2110 0716 2110 0713 8159 0005 8159 0005 1251 8184 1251 4781 1854 0989 1855 08
105. C ATN SRQ SRQ 751618 GND 10 1 19 18 54 35 36 37 38 39 41 42 23 33 PREN 24 es 16 17 15 27 26 29 14 15 50 51 12 HSRQ 52 ISRQ C142 420PF 50U C124 Ht 22 44 200 sme 0 19 062 01112006 Droe 02116 0965 5105 05115 09642 proa 04114052 5205 15 Dca 0101 TE CONT U117 99014 TRIG ACCRA __ REN Tt NRFD NDRC DAU EOI ATN 500 GND 22 500 N Y RCO 15 C132 047 509 ROM CLOCK RAM FP HPIB PTX UBRT FPRX RDY MSRQ BANKSEL ISRQ DFI EN WR SRX ace 50 C135 R Y101 22 F gt 132 1 1eMH2 r 7 I C108 C107 0 1 L101 509 228 22PF 25144 0 47UH 500 500 100 51 C123 C126 R143 j 67 LC 1 100K 66 27 R140 26 505 13 35 504 12 4 64K 503 OUT1 9 1802 MSRQ 52 Sot 55 500 RI rSr1 1 01 2 5L 1 02 39122 R141 22 2 4 64 E 13 12 18 RxD TxD PREN 9 PO PO 4 64 R139 10 PO R121 59 jak PO 2 4 R142 6 4 64K eo 5 4 64 4 3 5L gt UREF 2 AGND 1 0 16 PCLR 19 RESET RDY 6 880 U114 8 80C196 55 MM CLOCK CLKOUT C129 BUSWIDTH 047 4552 USS1 500 V DFI_EN FPTX PRX STX HSRQ CLK1 CLK2
106. CT You may want to use the average reading program described previously CC Source Effect This test measures the change in output current that results when the AC line voltage changes from the minimum to the maximum value within the specifications a Turn off the supply and connect the AC power line through a variable voltage transformer b Connect the output terminals as shown in Figure 2 1 with the DVM connected across the current monitoring resistor Set the transformer to the nominal line voltage c Turn the supply and program the current to the full scale value and the output voltage to the maximum programmable value see Table 2 3 d Adjust the load in the CV mode for full scale voltage as indicated on the front panel display Check that the CC annunciator is on If it is not adjust the load so that the output voltage drops slightly Adjust the transformer to 1346 below the nominal line voltage Record the output current reading DVM reading current monitoring resistor in ohms Adjust the transformer to 696 above the nominal line voltage Record the output current reading again pga The difference in the current readings in steps f and is the CC source effect and should not exceed the values listed in the Performance Test Record Form for the appropriate model under CC SOURCE EFFECT You may want to use the average reading program described previously CC Noise PARD Periodic and random devi
107. Current 20 A Tout 19 944 A A 20 056 A Front Panel Display Readback Tour 48 mA mA 48 mA Current Sink 4 A Display Readback Lix 54 mA mA Lii 54 mA PARD Ripple and Noise 0 mA 10 mA RMS Load Effect La 1mA mA Tou 1 mA Source Effect La 1 mA mA Tour 1 mA Enter your test results in this column 20 Verification Table 2 6 Performance Test Record for Agilent Model 6542 6642 MODEL Agilent Report No Date Test Description Minimum Results Maximum Spec 5 Spec Constant Voltage Tests Voltage Programming and Readback Low Voltage 0 V Vout 10 mV mV 10 mV Front Panel Display Readback Vout 15 mV mV Vou 15 mV High Voltage 20 V Vout 19 978 V V 20 022 V Front Panel Display Readback Vout 29 mV Vout 29 mV Load Effect Vou 2 mV Vou 2 mV Source Effect Vou 0 5 mV mV Vou 0 5 mV PARD Ripple and Noise Peak to Peak _____ mV 3 mV RMS uV 300 uV Transient Response Time 0 ______ 20 mV at 100 us Constant Current Tests Current Programming and Readback Low Current 0 A 13 mA mA 13 mA Front Panel Display Readback Tour 9 1 mA mA Tour 9 1 mA High Current 10 A Tou 9 972 A 10 028 Front Panel Display Readback Tour 24 1 mA mA Tout 24 1 mA Current Sink 2 A Display Readback Lu 27 mA mA 27 PARD Ripple and Noise RMS 0 mA 5mA Load Effect Lu 0 5 mA mA
108. D646 ARS 047 047 0671 gt 509 500 144150 4 R677 671 4 02K Eo R690 2k 1600 511 R683 IMON 7X D647 NEG IMON lt 1M645 31 6 dese 4 SENSE 1M4150 M SK 1X SK 1X 15U CU 15 46 4K 1 gt 20648 6 19625 15 2 0672 R612 13 R681 684 1N4150 S SK 100K Y 810606 SU 10K 3 NG R61 D615 10K 1000 R705 R714 C645 58696 R610 R611 2 lt Y 10M CUPROG gt 2 3 16 144150 WW 01 5X 10K 1 OK 1 4 C620 9 15V 250 5 1744 150 0610 Vv 2656 6612 GATED C611 1 2 15K gt 3300PF 4 R657 5 A AAA 307 ixi INB L2 e 0UT 0948 R618 R619 BINDING R908 lt R906 lt R907 R628 R635 RMOUTB RMINB RMOUTB POST 0 R785 8 25K lt 464 4603 115 4 SMM REF 9 ZX 0614 14645 0609 GOT C697 0692 4DUT 40UT R630 a D617 C691 210 21 J690 AU 22 ges 520612 _ al 2 200 A 0690 59 1108200 1 005 R629 14 7 14 7K 509 1 1 5 52 D611 VR611 C690 695 2E C698 ee E457 es R631 xX 1100 1100 f 275 cds Pn 209 400 01 OUT et R637 J604 C693 A 68C 77 BLOCK gt 1200 4 64K 01 2500 1007 Reis SE HEATSINK 50 607008 20K POST 0690 1 OUT Ce e e e e e OUT gt SPCLR CENTER TAP b 05 Ax OUT 150 48721 9221 CR201 SHUTDOWN 1 16 Z 0691 ps
109. ED 1 ALL RESISTORS ARE IN OHMS _ 1 1 8W C30 2 ALL CAPACITORS ARE IN MICROFARADS 3 0301 303 305 307 ARE SITTING ON SAME HEATSINK 0 1 IN THE FOLLOWING ORDER FROM FAN 0501 303 305 500 507 EU DO NOT LORD THESE COMPONENTS Figure 6 7 Right Tunnel Circuits Schematic Diagram for 655xA amp 665xA Models Only sheet 1 RAIL CONTROL gt THERM 4500 2 6 15 0302 gt 810501 i 5 pr 5 0301 21 5 MTP3055 3 I 4 Mcz4072 I R329 l I 2 0 I 6 159 DENT LY 1I 1005 1000 F304 R303 0 215 R304 AWN 1K R305 261K R325 R301 25 25 2 34 34 6 15 lt 1 OUT INB 6 15 C305 0 50 C306 RIGHT TUNNEL NOTES 5 4 NOTE UNLESS OTHERWISE SPECIFIED 1 0301 303 305 307 ARE SITTING ON SAME HEATSINK THE FOLLOWING ORDER FROM FAN 0301 303 305 307 Figure 6 7 Right Tunnel Circuits Schematic Diagram for 654xA amp 664xA Models Only sheet 2 59 50 R802 4 64K 4 64 59 FRONT PANEL J802 1 J802 2 REFERENCED TO M SUPPLY COMMON J802 z 600V ISOLATION J802 4 REFERENCED TO EARTH GROUND gt J802 6 7 511 50 50 CR802
110. Error if passcode is not 0 IF Err THEN OUTPUT Ps IDN Get data from model location ENTER Ps Idn Model VAL Idn POS Idn 1 ELSE GOTO Start END IF OUTPUT Ps CAL STATE ON Model Turn on cal mode passcode data at model number location GOSUB Ps_error Error if passcode is not same as data at model amp location IF Err THEN OUTPUT Ps CAL STATE ON Model 1 4 Turn on cal mode passcode model GOSUB Ps_error IF Err THEN PRINT Change pass code to the power supply model or zero then restart the program STOP ELSE GOTO Start END IF END IF Start Figure 3 17 Initialization and Factory Preset Replacement Program Listing Sheet 4 of 6 70 Troubleshooting 2030 2040 2050 2060 2070 2080 2090 2100 2110 2120 2130 2140 2150 2160 2170 2180 2190 2200 2210 2220 2230 2240 2250 2260 2270 2280 2290 2300 2310 2320 2330 2340 2350 2360 2370 2380 2390 2400 2410 2420 2430 2440 2450 2460 2470 2480 2490 2500 2510 2520 2530 INPUT Select Initialization T or Factory preset replacement F Sel CLEAR SCREEN SELECT UPC Sel CASE I Select Initialization GOTO Init_eeprom CASE F Select install new factory data GOTO Fact_preset CASE ELSE BEEP GOTO Start END SELECT Init_eeprom PRINT Initializing EEPROM FOR 1 1 45 OUTPUT Ps DIAG EEPR Addr 1 Length 1 Init_data D NEXT GOTO Cal
111. GO TO OUTPUT HELD HIGH TROUBLESHOOTING FIG 3 9 CHECK 80793 9704 702 CHECK VOLTAGES RT RIUBBB e 8 Rtusgs e 63 7 AND 1563 5 61 WITH RESPECT TO 9 SEE TABLE 6 3 CHECK 1 58 CHECK 8 Figure 3 7 OV At Turn On Troubleshooting Sheet 1 of 2 Troubleshooting 53 CHECK R718 C792 CHECK FOR PRESENCE OF OV PROG SIGNAL PULSES AT 91582 13 AND 0502 7 91582 13 CHECK RiR 0Q 8701 7715 PULSING C791 Figure 3 7 OV At Turn On Troubleshooting Sheet 2 of 2 54 Troubleshooting START OUTPUT HELD LOW THE SUPPLY S OUTPUT IS HELD LOW AND THE PROT FNNLNCIRTOR IS NOT ON TURN OFF SUPPLY DISCONNECT THE LORD AND REMOVE TOP COVER TURN ON SUPPLY AND CHECK THE BIFE PNO REFERENCE VOLTAGES TEST POINTS S THROUGH 3 SEE THELE 6 3 TROUBLESHOOT THE DEFECTIVE CIRCUIT SEE FIG 6 5 SHEETS 1 2 CHECK THAT THE RRIL AND RAIL VOLTAGES ARE CORRECT SEE FIG 6 5 SHEET 6552 SHEET 18 66530 OR SHEET 1204565549 CHECK POKER OF HR AC VOLTAGES SEE FIG 6 2 CHECK INPUT RECTIFIER FILTER CAPS SEE FIG 6 5 SHEET 1 PROGRAM THE OUTPUT TO FULL SCALE VOLTAGE AND CURRENT MERSURE OUTPUT WITH FN EXTERNAL METER TO ENSURE THERE 15 NO RERDBPCK CIRCUIT PROHLEM CHECK VOLTAGE AT miusee 6 wo niusie c 63 AILS 8 6 TROUBLESHOOT CV DFC CIROUIT R1USg2
112. GROUND J3 J2 8 5 Turn on the power supply and use the signature analyzer probe to take the following signatures Power 5 V 3395 Microprocessor A3U3 15 0000 A3U3 29 1029 A3U3 19 552U A3U3 30 0295 A3U3 20 954C A3U3 31 0000 A3U3 21 A552 A3U3 32 3395 A3U3 22 2954 A3U3 33 0008 A3U3 23 0A55 A3U3 34 040A A3U3 24 3395 A3U3 35 0102 A3U3 25 3395 A3U3 38 0002 A3U3 26 0000 A3U3 39 0020 A3U3 27 0000 A3U3 42 0000 A3U3 28 40A5 6 After completing the test be sure to return the J3 jumper to its original position Troubleshooting 47 Table 3 5 Secondary Interface SA Test Description These signatures check the secondary microprocessor AIU504 Valid AIU504 ROM Firmware Revision A 01 03 Test Setup See Figure 3 4 either Sheet 2 or Sheet 3 as applicable to your model 1 Turn off the power supply and remove the top cover 2 Connect signature analyzer CLOCK START STOP and GROUND inputs and setup as follows Signature Analyzer Edge A1 Board Connection Input Setting CLOCK 0504 32 START MA U502 7 STOP _ U502 7 GROUND U502 10 3 place the secondary interface in the SA mode turn on the power supply while momentarily for 2 seconds shorting A1U504 1 to A1U504 20 common 4 Use the signature analyzer probe to take the following signatures Power Microprocessor 5 After completing the tests be sure to return the J3 jumper to its original position 48 Troubl
113. IB Board PCA Tested through hole see Table 5 9B Front Panel Board Tested but Uninitialized Front Panel Board Tested amp Initialized Front Panel Board Tested amp Initialized Front Panel Board Tested amp Initialized Front Panel Board Tested amp Initialized Front Panel Board Tested amp Initialized Machine screw x 0 7 8 mm lg REF XFMR bracket Machine screw M3 x 0 5 10 mm lg REF front frame Machine screw x 0 7 10 mm 12 REF cover 5 PCB DGN Machine screw 5 x 0 810 mm lg REF 2 Cover Machine screw REF TERM Cover 2 Machine screw REF Fan Mounting Machine screw M5X0 8 REF 2 Handle Lock washer INTL T REF RPG Front Panel Board Lock washer HLCL REF Fan mounting Lock washer HLCL GPIB Connector Nut GPIB Connector Lock washer REF ground wire Flat washer MTLC REF Isolator PCA Hex nut DBL CHAM REF RPG Front Panel Board Hex nut DBL CHAM REF Isolator PCA self thread Nut self treading REF Display to front panel Quick disconnect mating plug for DIG CNTL connector A2TBIOI Quick disconnect mating plug for external connector AlJ640 Chaining cable for power supply link Label rear Label instrument Nameplate Nameplate Nameplate Nameplate Nameplate Nameplate Nameplate Nameplate Nameplate Nameplate Cover terminal block Table 5 4 Chassis Replaceable Parts for 200 Watt Models 654xA and 664xA continued Reference Applicable Agilent Part No Description Desig Models 0370 3238 K
114. INHIBIT 474 en ULN2003A 50 C742 C617 C618 R754 047 7 047 0721 2 15 500 500 OUSCR M ULN2003A Md pan Figure 6 5 1 Board CV CC Control 8 Output Bias Shutdown Circuits Schematic Diagram for 655xA amp 665xA Models Only sheet 2A 150 CERROS T OVP BIAS R658 R640 R641 159 4 905 sk a geri t AAA 152 F675 RADO 125242 150 1 CONTROL 1 1 0645 60 4 C640 ix 5 89605 Reve 15 ISUP R649 R653 7 R672 125A D674 150 15V C643 AAA AAA mE 6 D GATED GATED SK 1X SK 1 Al By 0e up Y SK D Y gt 1K DP CONTROL lt D676 R643 C641 15 R645 R67z gt gt gt 01 C660 1K SN Zs ere C644 1 e R716 LC 0640 ep 2 77047 H R668 V THERM HS 2 15K 2 500 0721 0673 3 6 11 TP2 144150 R676 uS E 2 150 ZX 0645 83047 15 6 44 ol AMB Sio LN2003A 6C2 M Pd U603 R701 R700 R715 J640 AAA Rice 46 4 46 4 2 15K 2 15K 0607 8 6 5629 C701 C700
115. Idn 21 Cal data 40 70 INTEGER Addr 1 45 Length 1 45 80 ASSIGN Ps TO 705 90 CLEAR SCREEN 100 110 Eprom_data_addr 120 DATA 2 6 10 14 18 19 20 24 28 32 130 DATA 36 37 38 42 46 50 54 55 56 57 140 DATA 64 68 72 76 80 150 152 153 154 155 150 DATA 156 158 160 162 163 164 165 166 167 168 160 DATA 169 170 171 172 174 170 180 Eprom_data_len 190 DATA 4 4 4 4 1 1 4 4 4 4 200 DATA 1 1 4 4 4 4 1 1 1 1 210 DATA 4 4 4 4 4 2 1 1 1 1 220 DATA 2 2 2 1 1 1 1 1 1 1 230 DATA 1 1 1 2 1 240 250 Eprom_data_6x41 260 DATA 468 3 16 6 8 19 0 83 0 177 140 20 475 0 270 DATA 99 1 78 25 78 25 8 8 0 83 255 20 10 280 DATA 6541 456 09 168 18 182 168 18 1768 5 255 0 0 290 DATA 16 6541 0 20 180 20 180 156 37 26 300 DATA 120 15 20 0 4 310 320 Eprom data_6x42 330 DATA 195 534 4 434 20 475 0 83 0 354 140 10 238 0 340 DATA 99 1 42 512 17 75 22 0 83 255 20 10 350 DATA 6542 167 156 365 156 1768 5 255 0 0 360 DATA 16 6542 0 20 180 20 180 156 37 26 370 DATA 120 15 20 0 4 380 390 Eprom data 6x43 400 DATA 111 16 6 35 81 0 83 0 587 140 6 143 0 410 DATA 99 1 18 68 78 75 38 5 0 83 255 20 10 420 DATA 6543 104 3 171 7 607 164 2 1768 5 255 0 0 430 DATA 16 6543 0 20 180 20 180 156 37 26 440 DATA 120 15 20 0 4 450 460 Eprom data 6x44 470 DATA 64 8 16 6 61 425 0 83 0 1010 136 86 3 583 0 480 DATA 99 1 10 43 78 2 66 0 83 255 20 10 490 DATA 6544 60 81 168 18 1044 168 18 1768 5 255 0 0 500 DATA 16 6544 0 20 180 2
116. L BOARDS A4A1 AND A4A2 DISCONNECT BOTTOM TUNNEL BOARDS A4A3 AND A4A4 YES RECONNECT TUNNEL BOARDS ONE AT A TIME TO iSOLATE DEFECTIVE BOARD NO CHECK A1U610 VOLTAGE R687 SHOULD gt 8V Figure 3 9 Output Held High Troubleshooting Troubleshooting 57 ONE OF THE ODAC CIRCUITS IS DEFECTIVE TURN OFF SUPPLY AND REMOVE TOP COVER TURN ON SUPPLY AND CHECK BIAS AND REF ERENCE VOLTAGES TEST POINTS S THROUGH 62 TABLE 6 30 TURN OFF THE SUPPLY SHORT AluS 4 1 SR MODE TO RiUuS 4 28 COM SEE FIG 3 4C TURN ON SUPPLY AND WAIT 2 SECONDS THEN REMOVE SHORT USE A SCOPE TO CHECK THE CV DAC R1USB8 6 CC DAC 915 19 5 AND REHDBACK DAC R1U 12 6 OUTPUTS COMPARE THE WAVEFORMS TAKEN RT THESE POINTS WITH THE WAVEFORMS GIVEN IN FIG 3 11 ONE DAC YES OUTPUT MISSING CHECK REF VOLTAGE FOR REPDBACK DAC AT 91585 63 WITH RESPECT TO 8 1L586 YES 11 6V NO CHECK R1L50S IF THE SUPPLY FRILS SELF TEST TURN OFF THE SUPPLY AND THEN DEPRESS AND HOLD THE KEY ON SUPPLY S FRONT PANEL FOR 2 SECONDS WHILE TURNING UNIT ON THIS WILL CAUSE THE SUPPLY TO SKIP SELF TEST TROLIBLESHOOT THE DEFECTIVE SEE FIG 5 5 DRC CHIP IS DEFECTIVE CvcR1USg2 CCCORIUSGSD OR RERDBRCK RIUSTL 5 CHECK 1504 SEE TABLE 3 5 PERFORM DRC PMPLIFIER TROUBLE SHOOTING SEE FIG 3 12 CHECK 1 511 4512 58 Troubleshooting Figure 3 10
117. MS 1 1 8W C605 0602 R775 Kur771 116 70604 2 ALL CAPACITORS ARE IN MICROFARADS 196 9 10 20 2 HP22 r m 1N4150 3 SECONDARY TO GROUND SPACING REQUIRE 14 1 56 1 55 15U MENTS 118 6 R607 4 CREEPAGE SPACING 181 T 5 DO NOT LORD THESE COMPONENTS WN F601 V 0 Figure 6 5 A1 Main Board AC Input Power Rectifier Bias and Fan Speed Control Circuits Schematic Diagram for 655xA amp 665xA Models Only sheet 1A RAIL XFMR PRI 1 BLK J452 2 XFMR PRI 2 BLK WHT 1452 4 n XF450 C450 ONO J450 3 J450 2 gt 5500 XFMR PRI 5 BLK YEL c23n0UT INB lt J452 3 ORG Cove BIAS E459 XFMR PRI 4 BLK GRN R451 lt J452 5 0 XFMR PRI 5 BLK ORG a NOTE c413 28695 C451 C452 1452 6 al LAYOUT T Sd 7 8200PF 0 6 FOR 500 2504 2500 IHS4 See m E XFMR PRI 6 BLK RED redi pSt R454 lt J452 1 RED 340174 J401 7 gt 450 4 J450 1 0 1401 8 QUT WHT RED 250 ac Bras RED WHT WHT RED J401 6 gt an C415 J401 3 25 IHS405 PZA F403 509 RAIL J401 9 158 4 88 7 28 FAN Tis 8061 F600 D600 R600 50 1600 1 2 25 5x E BIAS CT ZW 1957 yo R781 BIAS J600 2 2 2K 1 2 Bags AC C600 R601 2 5x 100 BIAS 2 965 1 24
118. N OFF SUPPLY REMOVE TOP COVER CHECK LINE VOLTAGE SELECT JUMPERS ON TI SEE FIG 6 2 FOR 666xA AND 656A FOR 664 664 SWITCH SETTINGS 400 S401 4 TURN ON SUPPLY AND CHECK PWR AND AC BIAS VOLTAGES AT XFMR T SECONDARY 1 BIAS VOLTAGE AT SECONDARY AND CABLE SEE FIG 6 2 2 GEC RIFGGG 05989 0581 5608 VOLTAGE READBACK CIRCUIT AILS 584 OR RERDIBRCK DAC OP 91811 US12 DEFECTIVE Figure 3 2 Overall Troubleshooting Flow Diagram Sheet 1 of 4 Troubleshooting 37 FROM SHEET 1 SEE CVICC STATUS TURN OFF SUPPLY CONNECT A SHORT ACROSS SUPPLY OUTPUT TERMINALS TURN ON SUPPLY AND PROGRAM FULL SCALE VOLTAGE AND CURRENT USING FRONT PANEL KEYS CHECK OUTPUT CURRENT WITH EXTERNAL OUTPUT CURRENT WITHIN SPEC eats CURRENT GRCUT OUTSIDE SPEC 1 DEFECTIVE N CAUBAATE THE SUPPLY SEE IN THE OPERATING MANU AL SEE CviCC STATUS ANMUNCIATOR ON T ANNUNCIATORS TROUBLESHOOTING PARAGRAPH TURN OFF SUPPLY AND REMOVE SHORT FROM TURN ON SUPLLY AND PROGRAM OUTPUT VOLTAGE CURRENT TO FULL SCALE AND THE TO 0 USING FRONT PANEL KEYS CHECK THAT SUPPLY GOES INTO AN PROT ANNUNCIATOR ON AND OUTPUT ZERO GO TO OV WILL NOT FIRE TROUBLESHOO TING FIG 3 6 CYCLE AG POWER PROGRAM THE SU
119. NAL METER OUTPUT VOLTAGE A3U3 U4 OR UB DEFECTIVE PRESENT PERFORM FRONT PANEL SA SEE TABLE 3 4 LCO OR CABLE W19 DEFECTIVE Figure 3 5 No Display Troubleshooting Troubleshooting 51 TROUBLESHOOT THE DEFECTIVE CIRQUIT SEE FIG 6 5 SHEETS AND 2 PROGRAM VOLTAGE CURRENT TO FULL SCALE FS AND OVER VOLTRGECOV TO 1 2 CHECK VOLTAGE AT 35 6 niuseg 2 64 AND R1U721 6 WITH RESPECT TO COM 9 CEC 1 708 C781 CHECK VOLTAGE AT 63 CHECK 018593 R783 C792 VOLTAGE RIUEMJ 7 SHOULD BE ev CHECK 1708 0798 BE SHORT Figure 3 6 OV Will Not Fire Troubleshooting 52 Troubleshooting CHECK THAT THE SUPPLY IS NOT PROGRAMMED TO CAUSE AN OV AT TURN ON ENSURE THAT THE VOLTAGE SETTING 1 NOT GREATER THEN THE OV SETTING MEMORY REGISTER 8 BY PROGRAMMING VOLTS PND MAXIMUM OV THEN SAVE REGISTER 2 PRESS THE SHIFT SAVE ENTER KEYS TURN OFF SUPPLY CAUTION DURING THESE TESTS THE CONNECT DC COUPLED SCOPE OUTPUT MAY BE AT HAZARDOUS LEVELS ACROSS THE SUPPLY S OUTPUT TERMINALS TURN ON SUPPLY AND CHECK THAT THE OUTPUT DOES NOT MOMENTARILY GO HIGHER THEN THE VOLTAGE SETTING MOMENTARILY YES GOES HIGH NO TURN OFF SUPPLY AND REMOVE TOP COVER DISABLE THE INPUT BY LIFTING AIR7 3 TURN ON SUPPLY AND CHECK THE OUTPUT VOLTAGE GO TO OUTPUT HELD HIGH TROUBLESHOOTING FIG 3 9
120. NNEL BOARD 2281 W11 A1J670 HRAD J3 8 RT3O1 Wi3 R1J6 2 R4R3 LEFT TUNNEL BORRD GPIB BORRD MG 2181 aos ear Se 3 WiBCAGALIG 8484 RIGHT TUNNEL BORRD Al MRIN BORRD VI5 81I1671 Jaee 1 1458 WIBCALD W17 913573 351 lt 4 75081 5 8211 97 5 Mistera TEZ na 811601 7 Pb XLI 664613291 72 Mitar Ti RC INPUT HIB R3S1 5085823363 g mma Taga 8 FARA 322 RC PR AC BIAS FL 7 13600 M8 626191 3405 J4e2 404 1411 1401 2 6 1 R3 FRONT PANEL ASSY 8381 51 WIR R1J450 WIBC T1 Figure 3 18 Location of Cable and Connector Locations for 655xA and 665xA Models Only Troubleshooting 73 List of Required Tools ho ao op IPT and 2PT Pozidriv screwdrivers T15 and T25 Torx screwdrivers Allen wrench 0 050 inch Hex driver 7 mm Long nose pliers Antistatic wrist discharge strap Top Cover Removal amp Replacement a b Using a T25 Torx screwdriver unscrew the two screws which hold the carrying straps to the power supply and then remove the other two screws from the opposite side of the case To remove the cover you must first spread the bottom rear of the cover and then push the cover back to disengage it from
121. NO POWER m CHECK FOR SERIAL DATA PULSES SUPPLY OPERATES gt AT A2U1I0 3 TEST POINT 5 PROPERLY 7 WITH RESPECT TO PRIMARY GROUND 1 SEE TABLE 6 3 YES lt CHECK 2010 UNO TROUBLESHOOT A2 ISOLATOR ra BOARD AND CABLE W8 YES CHECK FOR 5V AT A2U110 0 WITH RESPECT TO SECONDARY COMMON TEST POINT 3 SEE TABLE 6 3 CHECK CABLE 8 SEE FIG 6 1 CHECK SECONDARY BIAS CIRCUIT TEST POINTS 9 AND 9 SEE TABLE 6 3 CHECK FOR SERIAL DATA PULSES AT THE 1 BOARD CIRCUIT POINTS AS INDICATED BELOW WITH RESPECT TO SECONDARY COMMON 9 PULSES AT A10504 10 CHECK A2UTIO CABLE W9 OPEN Figure 3 14 Secondary Down Troubleshooting Sheet 1 of 2 62 Troubleshooting NL CHECK SPCLR SIGNAL AT A1U720 6 PONT 3 TABLE 6 3 FOR SN 12 MHz CLOCK SIGNAL 504 18 CX SPCLR NO Wl C scu 2 CHECK A1U720 YES EN 5 12 MHz M0 CLOCK OK CHECK 502 C503 Y501 PULSES NO AT 502 2 ES CHECK CABLE W8 AND A3U3 CHIP CHECK FOR SERIAL DATA PULSES AT THE A2 GPIB BOARD AT 2 11 6 TEST POINT 6 WITH RESPECT TO PRIMARY GROUND 1 SEE TABLE 6 3 PULSES AT 2 11 6 CHECK 2 CABLE WB CHECK 21 19 Figure 3 14 Secondary Down Troubleshooting Sheet 2 of 2 Troubleshooting 63 i THE
122. OGRAMMED SECONDARY GPL MICROPROCESSOR 502 504 0V568 ev FAN PWM ec INHIBIT TO FROM FIG 4 4 CV 12 BIT TO FROM V 8 45 DAC OP AMP CVPROG FIG 4 4 0507 0508 CC 12 BIT NEG IMON DAC REF DAC OP AMP CCPROG ANALOG 0505 0506 ee THERM COMPARATORS TM 0503 0513 NOTE 1 THERM HS THE TEMPERATURE WITHIN CVPROG READBACK 0 9 THE UNIT THERM AMB DAC OP AMP AND AT THE HEATSINK ASSY tU5tt U512 THERM HS ARE MONITORED Figure 4 3 Secondary Interface Simplified Block Diagram The microprocessor produces the FAN PWM signal whose pulse width is varied depending upon the ambient temperature The FAN PWM signal is applied to the fan speed control circuit in order to speed up the fan as temperature increases and to slow the fan speed down as temperature decreases The INHIBIT signal is generated by the microprocessor to hold the supply s output off during turn on and when the supply OVs The INHIBIT signal is sent to the output stage bias shutdown circuit in order to shutdown the bias voltage to the output stages and to keep the supply output off The microprocessor produces the OVPROG signal which is also a pulse width modulated signal that represents the programmed over voltage protection level The OVPROG signal is sent to the OV monitor circuit which compares the actual output voltage level with the OVPROG signal When the output voltage exceeds the OVPROG signal level the OV monitor ci
123. PPLY TO FAL SCALE VOLTAGE AND CURRENT TURN SUPPLY OFF AND CONNECT A GPIB CONTROLLER TO THE SUPPLY TURN SUPPLY ON AND USE THE CONTROLLER TO PROGRAM THE SUPPLY TO FULL SCALE VOLTAGE AND CURRENT CHECK THAT THE SUPPLY ACCEPTS THE GPIB COMMANDS AND CAN PROGRAMMED RAPIDLY 1 CHECK GPIB CABLE 2 CHECK AQUTS 017 1120 TO SHEET 4 Figure 3 2 Overall Troubleshooting Flow Diagram Sheet 2 of 4 38 Troubleshooting OLTHGE RIGHT BUT QUTSITE PROT BPNMUNCIRTOR ON DISPLAY OUTPUT v FROM SHEET 2 CALIBRATE THE SUPPLY SEE RPPEENDIX IN THE OPERATING CHECK R1US13 RT 8 CHECK IF OCP IS ENABLED RT TURN ON AND CURRENT 15 PROGRAMMED TO ZERO Ri REMOTE INHIBIT DISPLAYED CHECK FOR SHORT BETWEEN ReTB181 3 AND GROUND VOLTAGE MONITOR CIRCUIT 7914585 DEFECTIVE OUTPUT YES CHECK OUTPUT FOR SHORT SHORTED CIRCUIT NO CURRENT MONITOR CIRCUIT pasa ipsa 914585 DEFECTIVE OUTPUT 12 YES GO TO OUTPUT HELD LOW TROUBLESHOOTING FIG 3 8 GO TO OUTPUT HELD HIGH TROUBLESHOOTING FIG 3 9 Figure 3 2 Overall Troubleshooting Flow Diagram Sheet 3 of 4 Troubleshooting 39 GO TO SLOW DOWN PROGRAMMING TROUBLESHOOTING FIG 3 19 See Oo ae eee l FOR SYSTEM UNIT ONLY CHECK OPERATION OF THE DIGITAL CONTROL PORT SEE APPENDIX A IN OPERATING MANUAL SERIAL LINK SEE CHAPTER 4 IN CHECK FEULI3 0110 0114 USE
124. PRIMARY SR TABLE 3 3 TO CHECK F U114 018 CHECK FeU189 0114 USE PRIMARY 3 3 TO CHECK Peu188 CHECK VOLTAGE ROGI AND OR CURRENT CONTROLS AND CLE CONNECTIONS NO PROBLEMS FOUND PERFORM VERIFICATION TESTS IN CHAPTER 2 TO DETERMINE IF PROBLEM EXITS Figure 3 2 Overall Troubleshooting Flow Diagram Sheet 4 of 4 40 Troubleshooting Firmware Revisions for Models 664 amp 665 You can use the IDN query to identify the revision of the supply s firmware The query will readback the revisions of the primary ROM A2U106 the front panel ROM A3U4 and the secondary microprocessor 504 The manufacturer and model number of the supply are also returned The following is a sample program 10 ALLOCATE L 52 20 OUTPUT 705 IDN 30 ENTER 705 L 40 DISP L 50 END The computer will display the manufacturer s name the model number 0 and then the firmware revisions Example AGILENT TECHNOLOGIES 665 1A 0 fA 01 05sA 01 02pA 01 05 where pA 01 05 is the primary interface p firmware revision see Table 3 3 fA 01 05 15 the front panel f firmware revision see Table 3 4 sA 01 02 15 the secondary interface s firmware revision see Table 3 5 For Agilent models 654 amp 655 the revision level of the ROMs can be found on the label affixed to the physical IC chip itself Test Headers For Agilent models 664xA amp 665xA there
125. REF Jes 0 J600 3 045 0 m 1009 R778 270 ium D601 22 ZX R270 9775 lt R772 L3 a 25 200K lt 111 1K 150 Ax Ax C602 C606 1 U603 gt 2200 Tu 5 35 3 100 4 s MC4 CENTERS 5 2592 J602 1 2 4 1 3 6774 10 57 Tee 20U Pap 83 1841 3602 22K 1X GENERAL NOTES 1000 NOTE UNLESS OTHERWISE SPECIFIED 5 1 ALL RESISTORS ARE IN OHMS _ 1 1 8W J606 0602 2 ALL CAPACITORS ARE IN MICROFARADS 1 2200 3 ISOLATION SPACINGS 2 Quee 770 PRI GND SMM D602 3 50 M225 UR221 0604 PRI SEC 6MM 4g ay lt k 9 1U 20 uez 1 1M4150 SEC GND 4 5 5 150 SEC SEC 2MM POWER AREA 3 R607 4 00 NOT LOAD THESE COMPONENTS AAA F601 0605 V 0 Figure 6 5 A1 Main Board AC Input Power Rectifier Bias and Fan Speed Control Circuits Schematic Diagram for 654xA amp 664xA Models Only sheet 1B 150 U TAON OUP BIAS gt A R711 2674 150 1
126. Replacement Locate and carefully peel off the vinyl trim one strip on each side of front panel assembly to gain access to the side screws that secure the front panel assembly to the chassis Using a T10 Torx screwdriver unscrew the screws from the side of the front panel Disconnect the phone cable from connector J6 on the A3 board the other end of the cable goes to the A2 board Now move the front panel assembly forward a few inches away from the chassis to gain access to the S1 power switch Disconnect the wires going to the S1 switch assembly and note the color coding of the wires and the respective pins to which they connect for subsequent reconnection The front panel assembly can now be removed from the power supply To reinstall the front panel assembly perform the above steps in reverse order Troubleshooting 75 VINYL STRIP COVERS RESTRAINING SCREWS Figure 3 21 Removing Vinyl Strip from Sides of Front Panel Assembly 1 Line Switch Removal and Replacement a First remove the front panel assembly as described under Front Panel Assembly Removal and Replacement b On the front panel assembly release the switch locking tabs by pressing them inward against the body of the switch and then remove the switch Note When re installing this switch be sure that the screened letter is at the top of the switch A3 Front Panel Board Removal and Replacement First remove the front pane
127. Resistor 100 1 125W 0698 0084 Resistor 2 15K 1 0757 0284 Resistor 150 1 125W Not used 0757 0284 Resistor 150 1 125W 0698 3155 Resistor 4 64K 1 0698 8827 Resistor 1M 1 125W 65 6651A 0698 3572 Resistor 60 4K 1 65 6652A 0757 0452 Resistor 27 4K 1 65 6653A 0698 8820 Resistor 825K 1 65 6654A 0698 3260 Resistor 464K 1 65 6655A 0699 0070 Resistor 3 16M 1 124 Replaceable Parts Table 5 7 Parts List For 500 Watt 1 Board for 655 amp 665 continued Desig R715 0757 0280 Resistor 1K 1 125W R716 0698 0084 Resistor 2 15K 1 R717 718 0698 3441 Resistor 215 196 125W R719 Not used R720 0698 3151 Resistor 3 83K 1 R721 722 0757 0280 Resistor 1K 1 125W R723 724 0698 3260 Resistor 464K 1 R725 0698 3155 Resistor 4 64K 1 R726 0698 3153 Resistor 3 83K 1 R727 0757 0442 Resistor 10 1 125W R728 0757 0449 Resistor 20K 1 125W R729 0757 0442 Resistor 10 1 125W R730 0698 0084 Resistor 2 15K 1 R731 0698 3260 Resistor 464K 1 R732 733 0698 3155 Resistor 4 64K 1 R734 0757 0442 Resistor 10 1 125W R740 741 0698 3155 Resistor 4 64K 1 R742 0757 0199 Resistor 21 5K 1 R743 0757 0441 Resistor 8 25K 1 R744 0757 0280 Resistor 1K 1 125W R745 0683 0475 Resistor 4 7 5 25W R746 0698 3162 Resistor 46 4K 1 R747 749 0757 0199 Resistor 21 5K 1 R750 0757 0280 Resistor 1K 1 125W R751 0683 0475 Resistor 4 7 5 25W R752 0698 3160 Resistor 31 6K 1 R753 0757 0465 Resistor 100K 1 R754 65 6651A 65 6655A 0698
128. SERVICE MANUAL GPIB DC Power Supplies Agilent Series 654xA 655xA 664xA 665xA For instruments with Serial Numbers Agilent Model 6541A US36360101 and above Agilent Model 6542A US36360101 and above Agilent Model 6543A US36340101 and above Agilent Model 6544A US36390101 and above Agilent Model 6545A US36340101 and above Agilent Model 6551A US36480101 and above Agilent Model 6552A US36230101 and above Agilent Model 6553A US36340101 and above Agilent Model 6554A US36340101 and above Agilent Model 6555A US36340101 and above Agilent Model 6641A US36410101 and above Agilent Model 6642A US36400101 and above Agilent Model 6643A US36400101 and above Agilent Model 6644A US36410101 and above Agilent Model 6645A US36390101 and above Agilent Model 6651A US36400101 and above Agilent Model 6652A US36400101 and above Agilent Model 6653A US36400101 and above Agilent Model 6654A US36390101 and above Agilent Model 6655A US36390101 and above For instruments with higher serial numbers a change page may be included For instruments with lower serial numbers see Appendix A Agilent Part No 5959 3376 Printed in USA Microfiche Part No 5959 3377 September 2000 CERTIFICATION Agilent Technologies Inc certifies that this product met its published specifications at time of shipment from the factory Agilent Technologies Inc further certifies that its calibration measurements are tr
129. SOLATOR BOARD USED HERE WITH 654 655xA MODELS Figure 3 1 Top View with Cover Removed for 655xA amp 665xA Models Sheet 2 of 2 Troubleshooting 33 Table 3 1 Test Equipment Required for Troubleshooting Type Purpose Recommended Model GPIB Controller used only with models 664xA amp 665xA To communicate with the supply via the HP Series 200 300 GPIB interface Signature Analyzer To troubleshoot most of the primary and Agilent 5005 A B secondary interface circuits Ammeter Current Shunt Digital Voltmeter To check various voltage levels To measure output current Agilent 3458A Logic Probe To check data lines Agilent 545A Oscilloscope To check wave forms and signal levels Agilent 54504A 54111A IC Test Clips To access IC pins AP Products No LTC Overall Troubleshooting Overall troubleshooting procedures for the power supply are given in the flow chart of Figure 3 2 The procedures first check that neither an AC input nor a bias supply failure is causing the problem and that the supply passes the turn on self test no error messages The normal turn on self test indications are described in the Power on Checkout paragraph in Chapter 3 of the Operating Manual If the supply passes the self test Figure 3 2 directs you to perform the verification procedures in Chapter 2 from the front panel to determine if any functions are not calibrated or are not o
130. SSOR CIRCUIT ON MAIN BOARD OR OPEN CABLE U802 0804 FRONT PANEL CKTS LOADING SIGNAL FRONT PANEL yP CIRCUITS OPEN CABLE OR U804 LOADING SIGNAL UBOt 0804 OR SEC CIRCUITS LOADING SIGNAL Figure 3 16 Isolator Board Circuits Troubleshooting Troubleshooting 65 EEPROM Initialization EEPROM chip A3U6 on the front panel board stores the supply s GPIB address and model number as well as other constants which are required to program and calibrate the supply The EEPROM was initialized with the proper constants before the supply was shipped from the factory If the front panel board A3 or the EEPROM chip A3U6 is replaced the supply must be reinitialized with the proper constants by running the program listed in Figure 3 17 The program will pause and prompt you to select either Initialization 1 or Factory Preset Replacement F You must select I in order for the program to continue and initialize the supply After the supply has been initialized using this program it must be calibrated as described in Appendix A of the operating Manual After calibration has been completed you should transfer the calibration constants to the new EPROM s Factory Cal locations as described below Note If the EEPROM A3U2O or the front panel board is replaced the EEPROM must be reinitialized For models 654xA amp 655 a separate GPIB board can be installed temporarily in place of the A2 Isolator Board in order to perform the re
131. SUPPLY OPERATES BUT WILL SINK CURRENT TURN OFF SUPPLY AND REMOVE TOP COVER TO GAIN START SLOW DOWNPROGRAMMING NOT DOWN PROGRAM OR WILL NOT ACCESS TO 1 MAIN BOARD AND THE LEFT TUNNEL CIRCUIT TURN ON SUPPLY AND PROGRAM FULL SCALE VOLTAGE AND CURRENT CHECK VOLTAGE DROP AT 1 687 WITH RESPECT TO SECONDARY COMMON 9 SEE TABLE 6 3 0 13V I atone _ AICR672 9610 S ce N CHECK VOLTAGE BASE OF 0206 67 ON LEFT TUNNEL CIRCUITS CONNECT METER COMMON TO 3 ra CHECK 0201 6204 0202 ON PASE LEFT TUNNEL CIRCUITS CHECK Q206 Q205 ON LEFT TUNNEL CIRCUITS Figure 3 15 Slow Down Programming Troubleshooting 64 Troubleshooting 5V AT J800 6 TO SEE COM 4800 9 5 AT C804 TO PRIMARY COM lt C803 SPCLR HIGH NO J800 2 SEC COM J800 1 YES RESET HIGH J801 2 PRI COM 803 NO YES PULSE AT BSTX J800 3 TO SEC COM 0800 1 NO PULSES MX07 M0 J801 3 TO PRI YES PULSES AT TxD J801 4 TO PRI COM NO YES PULSES AT Rx J800 4 TO SEC COM U800 1 NO YES ISOLATOR BD CHECK CABLES END CHECK 5V BIAS CIRCUIT ON MAIN BOARD OR OPEN CABLE C800 U805 5V LOADED INPUT V 11 VAC CHECK SPCLR CIRCUIT ON MAIN BOARD OR OPEN CABLE CHECK 1800 0801 FRONT PANEL LOADING SIGNAL SEC MICROPROCE
132. Turnon the supply under test and program the output voltage to zero The current on the UUT display should be approximately 20 of the full scale current d Divide the voltage drop across the current monitoring resistor by its resistance to obtain the current sink value in amps and subtract this from the current reading on the display The difference between the readings should be within the limits specified in the Performance Test Record Form for the appropriate model under CURRENT SINK DISPLAY AND READBACK CC Load and Line Regulation These tests CC Load Effect and CC Source Effect given below are tests of the DC regulation of the power supply s output current To insure that the values read are not the instantaneous measurement of the AC peaks of the output current ripple several DC measurements should be made and the average of these reading calculated An example of how to do this is given below using an Agilent 3458A System Voltmeter programmed from the front panel Set up the voltmeter and execute the Average Reading program as follows a Program 10 power line cycles per sample by pressing 5 6 Ester b Program 100 samples per trigger by pressing 1 9 Enter Setup voltmeter to take measurements in the statistical mode as follows Press shift key shift key 0 Press until MATH function is selected then press gt Press until STAT function is selected then press En
133. USGE SEE FIG 3 18 Yes ALLS 16 NO TROUBLESHOOT CC DAC CIRQUIT 8 5 ALUS B US1 SEE FIG 3 18 Yes CHECK IF CV R1DS1S CCCAIDSS OR GATE 010088 FRE CONDUCTING AILS YES TO SHEET 2 Figure 3 8 Output Held Low Troubleshooting Sheet 1 of 2 Troubleshooting 55 FROM SHEET 1 10651 CONDUCTING CHECK VOLTAGES AT AtU610 5 AND AIR686 37 WITH RESPECT TO COMMON 9 A1U610 5 NEG I8686 gt 12 7 CHECK IF SUPPLY OPERATES WITH NO LOAD BUT FULL SCALE OUTPUT CANNOT BE ATTAINED WITH LOAD CONNECTED CHECK GATED 15V AND SHUTDOWN CIRCUIT SEE TEST POINTS THROUGH 21 TABLE 6 3 AND FIG 6 5 SHEET 2 CHECK IMON VOLTAGE AT A1U605 1 9 WITH RESPECT TO COMMON 9 10605 1 OV COMPARATOR A U605 1 2 3 DEFECTIVE IMON A1U605 5 6 7 DEFECTIVE 1 _ _ _ _ __ GROSS CURRENT LIMIT CIRCUIT AlU607 DEFECTIVE CHECK 1 670 0670 LOADING OF VOLTAGE BY TUNNEL CIRCUITS DISCONNECT CABLES FROM TUNNEL BOARDS A4A1 A4A4 ONE AT A TIME TO SEE IF OUTPUT VOLTAGE RISES TROUBLESHOOT OR REPLACE DEFECTIVE BOARD CHECK 10607 0670 DICSCONNECT CABLES FROM TUNNEL BOARDS A4A1 A4A4 ONE A TIME TO SEE ONE HAS LITTLE OR NO AFFECT TROUBLESHOOT OR REPLACE DEFECTIVE BOARD CHECK INDIVIDUAL CELLS IN TUNNEL CIRCUITS TO INSURE ALL ARE WORKING Fi
134. V Vout 80 mV High Voltage 120 V Vout 119 877 V V 120 123 V Front Panel Display Readback Vout 164 mV mV Vout 164 mV Load Effect Vou 5 mV mV Vou 5 mV Source Effect Vout 2 mV mV Vout 2 MV PARD Ripple and Noise Peak to Peak mV 7 mV RMS 700 IV Transient Response Time 0 mV 120 mV at 100 us Constant Current Tests Current Programming and Readback Low Current 0 A Iou 1 7 mA mA 1 7 mA Front Panel Display Readback 1 3 mA mA 1 3 mA High Current 1 5 A Tout 1 49605 1 50395 Front Panel Display Readback Tout 3 55 mA mA 3 55 mA Current Sink 0 3 A Display Readback Li 3 95 mA mA 1 3 95 PARD Ripple and Noise RMS 0 mA 1 mA Load Effect Tou 0 25 mA mA Tou 0 25 mA Source Effect Tou 0 25 mA mA 1 4025 mA Enter your test results in this column 24 Verification Table 2 10 Performance Test Record for Agilent Model 6551A 6651A MODEL Agilent Report No Date Test Description Minimum Results Maximum Spec 5 Spec Constant Voltage Tests Voltage Programming and Readback Low Voltage 0 V 5 mV mV 5 mV Front Panel Display Readback Vou 6 mV mV Vou 6 mV High Voltage 8 V Vout 7 9902 V V 8 0098 V Front Panel Display Readback Vout 11 6 mV Vout 11 6 mV Load Effect Vou 1 mV mV Vou 1 mV Source Effect Vou 0 5 mV mV Vou 0 5 mV PARD Rippl
135. Verification The functional circuit operation of the various Agilent models is described in Chapter 4 Replaceable parts lists and circuit diagrams are included in Chapters 5 and 6 respectively Table 1 1 Agilent Power Supplies Described In This Manual Agilent Models 200 Watt Models 500 Watt Models GPIB Agilent 6641A 6645A Agilent 6651A 6655A Analog Programmable Agilent 6541A 6545A Agilent 6551A 6555A Conventions Used In Text 1 Power supply models can be divided into 200 watt and 500 watt models A 4 in the third position of the model number indicates a 200 watt supply while the digit 5 in the third position indicates a 500 watt unit 2 Inaddition power supplies can be divided according to GPIB supplies or Analog Programmable supplies GPIB models have a 6 in the second position of the model number while Analog Programmable supplies have a 5 in the second position of the model number The GPIB models include a GPIB board which permits communications between the supply and an external computer over the GPIB bus Analog Programmable supplies use an Isolator Board instead of the GPIB board and do not have the ability to communicate with an external computer 3 When referring in text to either the 200 watt or 500 watt GPIB power supply models the convention models 664xA or 665xA respectively is used When referring to either the 200 watt or 500 watt GPIB or Analog Programmable
136. W PW Not used Not used Resistor 3K 5 10W PW Resistor 5K 5 10W PW Resistor 100 5 3W PW Resistor 390 5 3W PW Resistor 1K 1 125 Not used Resistor 800 5 10W Resistor 3K 5 10W PW Resistor 5K 5 1OW PW Not used Not used Resistor 0 Ohms Resistor 1M 1 125W Resistor 287K 1 Resistor network 4 7K Resistor 51 1K 1 Resistor 1 62K 1 Resistor 19K 1 Resistor 22K 1 125W Resistor 10 1 125W Resistor 100 1 125W Resistor 287K 1 Resistor 100 1 Resistor 75K 1 125W Resistor 2 15K 1 Resistor 4 64K 1 Resistor 25 Ohms 5 3W Not used Resistor 0 Ohms Resistor 10K 1 Resistor 9K 1 125W Resistor 10 1 125W Resistor 20K 1 Resistor 14 7K 1 Resistor 2 2M 5 25W Resistor 3 16K 1 Resistor 8 25K 1 Replaceable Parts 121 Table 5 7 Parts List For 500 Watt 1 Board for 655 amp 665xA continued Desig R619 0698 0082 Resistor 464 1 125W R620 621 0757 0449 Resistor 20K 1 125W R622 65 665 1A 65 6653A 0699 2246 Resistor 25K 05 65 6655A 65 6654A 0699 2248 Resistor 47 5K 05 65 6651A 0699 3103 Resistor 19K 05 65 6652A 0699 2298 Resistor 47 5K 05 65 6653A 0699 2879 Resistor 80K 05 65 6654A 0699 2198 Resistor 243K 05 65 6655A 0699 3104 Resistor 250K 05 65 6651A 0698 6362 Resistor 1K 1 65 6652A 0698 6631 Resistor 2 5K 1 65 6653A 0698 6614 Resistor 7 5K 1 65 6654A 0699 2198 Resistor 42K 1 65 6655A 0698 6353 Resistor 50K 1 65 665 1A 65 6653A 0699 2246 Resistor
137. Y na MHITE RETVGREY 1405 I GPIB BOARD NOTES x 1 FUSE F450 IS 15A FOR 100VAC INPUT 12 FOR 120 VAC INPUT FOR 220 240 VAC INPUT 2 1115 SHOWN CONNECTED FOR 120 VAC INPUT JUMPERS AND AS WELL AS THE NOTES WHITE RED GREY WIRE MUST BE CONNECTED ACCORDING TO THE REQUIRED LINE VOLTAGE AS SHOWN BELOW THE GREY WIRE REMAINS CONNECTED T1 4 IN ALL CASES UNE VOLTAGE JUMPER WHITE RED GREY 100 11 2 00 TO 11 1 0 Te C 1 3 0 11 5 120 VAC 1 2 09 11 10 11 8 O 1 5 0 71 9 3 220 11 6 11 7 8 D TO THI O 1 38 240 VAC THE 1 7 0 Tit D 11 50 THE 71 POWER TRANSFORMER S TERMINAL LOCATIONS AND CABLE CONNECTIONS ARE SHOW IN FIGURE 6 9 FOR MODELS 665 THE A2 BOARD IS THE GPIB BOARD AND CONNECTOR IS P101 FOR MODELS 655 THE A2 BOARD IS THE ISOLATOR BOARD AND CONNECTOR 5 4803 SEE FIGURE 6 1 FOR INTERCONNECTION WIRING DIAGRAM Figure 6 2 AC Power Distribution Diagram for 655xA amp 665xA Models m WwW
138. _off Fact_preset CLEAR SCREEN PRINT This program should ONLY be completed if your power supply PRINT EEPROM has been replaced or a component that will effect PRINT the calibration AND the alignment of voltage overvoltage PRINT and current is complete AND unit has passed the performance PRINT test Enter C to continue any other key to abort INPUT Cont_prog IF UPC Cont_prog lt gt C THEN GOTO Cal off CLEAR SCREEN PRINT Transferring calibration data to factory preset locations Fact cal sour Address of factory calibration data source DATA 2 6 68 72 20 24 76 80 150 Fact cal dest Address of factory calibration data destination DATA 84 88 92 96 100 104 108 112 116 Fact cal len Length of factory calibration data DATA 444444442 RESTORE Fact cal sour FOR 1 1 TO 9 READ Cal sour NEXTI RESTORE Fact dest FOR I 1 TO 9 Figure 3 17 Initialization and Factory Preset Replacement Program Listing Sheet 5 of 6 Troubleshooting 71 2540 READ Cal_dest_addr I 2550 NEXTI 2560 2570 RESTORE Fact_cal_len 2580 FOR I 1 T09 2590 READ Cal length T 2600 NEXTI 2610 2620 FOR I 1 T09 Locations of good data 2630 OUTPUT QGPs DIAG EEPR Cal sour addr D Cal length I Read good data 2640 ENTER Ps Cal_data Enter good data 2650 OUTPUT QGPs DIAG EEPR Cal dest addr D Cal length D Cal data Write good data to factory preset locat
139. aceable to the United States National Bureau of Standards to the extent allowed by the 5 calibration facility and to the calibration facilities of other International Standards Organization members WARRANTY This Agilent Technologies Inc hardware product is warranted against defects in material and workmanship for a period of three years from date of delivery Agilent Technologies Inc software and firmware products which are designated by Agilent Technologies Inc for use with a hardware product and when properly installed on that hardware product are warranted not to fail to execute their programming instructions due to defects in material and workmanship for a period of 90 days from date of delivery During the warranty period Agilent Technologies Inc will at its option either repair or replace products which prove to be defective Agilent does not warrant that the operation of the software firmware or hardware shall be uninterrupted or error free For warranty service with the exception of warranty options this product must be returned to a service facility designated by Agilent Technologies Inc Customer shall prepay shipping charges by and shall pay all duty and taxes for products returned to Agilent for warranty service Except for products returned to Customer from another country Agilent Technologies Inc shall pay for return of products to Customer Warranty services outside the country of initial purchase are i
140. acitor 10 pF 596 100V 65 6652A 0160 4795 Capacitor 4 7 pF 65 6654 65 6655 0160 4789 Capacitor 15 pF 596 100V 65 6651A 65 6652A 0160 4801 Capacitor 100 pF 5 100V 65 6653 65 6655 Not used 65 6651A 65 6652A 0160 4788 Capacitor 18 pF 5 100V 65 6655A 65 6653A 65 6654A 0160 4791 Capacitor 10 PF 5 100V 0180 6827 Capacitor 0 022 uF 400V 0160 0161 Capacitor 0 01 uF 10 65 6651A 65 6652A 0160 4813 Capacitor 180 PF 5 65 6653A 65 6654A 0160 4803 Capacitor 68 PF 1 65 6655A 0160 4805 Capacitor 47 pF 5 100V C643 644 Capacitor 047 uF 20 C645 0160 4355 Capacitor 0 01 uF 10 C646 65 6651A 65 6652A 0160 4805 Capacitor 47 uF 65 6652A 65 6654A Not used C671 0160 4791 Capacitor 10 pF 5 100V C672 65 6651A 65 6655A 0160 4807 Capacitor 33 pF 5 100V mounted on pins 65 6652A 65 6654A 0160 4807 Capacitor 33 pF 5 100 in D673 location C673 689 Not used 118 Replaceable Parts Table 5 7 Parts List For 500 Watt 1 Board for 655 amp 665xA continued Desig 65 6651A Not used 65 6652A 0180 2728 Capacitor 1100 uF 40V 65 6653A 0180 3382 Capacitor 440 uF 50V 65 6654A 0180 3685 Capacitor 120 uF 100V 65 6655A 0180 3653 Capacitor 56 uF 200V 65 6651 A 65 6653A 0160 5422 Capacitor 0 047 uF 20 50V 65 6654A 0180 4834 Capacitor 0 047 uF 10 100V 65 6655A 0160 0159 Capacitor 6800 pF 10 C692 693 0160 4355 Capacitor 0 01 uF 10 C694 0160 5410 Capacitor 3300 pF 5 50V C695 65 6651A 0180 4346 Capacitor fixed 10000 uF 65 6652 65 6655
141. ad lg long PCB pc board w with How To Order Parts You can order parts from your local Agilent Technologies Sales and Support Office see the list of offices in the back of this manual When ordering a part please include the following information e the Agilent part number e the part description e desired quantity e the power supply model number Agilent 6545 Replaceable Parts 95 65 6641 65 6642 65 6643 65 6644 65 6645 6541A 6545A 6641A 6645A 6641A 6645A 6541A 6542A 6543A 6544A 6545A 96 Replaceable Parts 06641 61030 06642 61030 06643 61030 06644 61030 06645 61030 5060 3398 5060 3399 5060 3317 5060 3400 06541 61001 06542 61001 06543 61001 06544 61001 06545 61001 0515 0433 0515 0374 0515 0380 0515 0386 0515 1085 0515 1285 0515 1384 2190 0016 2190 0585 2190 0586 0380 0643 2190 0646 3050 0893 2950 0043 0535 0023 0590 0534 1252 1488 1252 3698 5080 2148 5080 2228 5080 2248 06541 80001 06542 80001 06543 80001 06544 80001 06545 80001 06641 80001 06642 80001 06643 80001 06644 80001 06645 80001 0360 2191 Table 5 4 Main Chassis Replaceable Parts for 200 Watt Models 654xA and 664xA Reference Applicable Agilent Part No Desig Models Description Mother Board PCA Tested Mother Board PCA Tested Mother Board PCA Tested Mother Board PCA Tested Mother Board PCA Tested Isolator Board PCA Tested GPIB Board PCA Tested surface mount see Table 5 9A GP
142. alling these cables c Disconnect the ground wire between the main board and the chassis This wire is secured to the side of the chassis near the AC input d For500 watt 6x5xA models only Disconnect the following DC power cables from connectors on the tunnel boards which are located on Heat Sink Assembly A4 Cables W12 and W14 from 1202 on the top left tunnel board A4A1 and bottom left tunnel board A4A2 respectively Cables W16 and W18 from J302 on the top right tunnel board A4A3 and bottom right tunnel board A4A4 respectively e Remove two screws one on each side near J691 and J450 respectively which secure the main board to the chassis f Slide the main board towards the front panel to release it from six chassis mounted standoffs and then lift the board out of the chassis A4 Heatsink Assembly 500 Watt Models 6x5xA Only This assembly is comprised of a top heatsink with left A4A1 and right A4A3 tunnel boards a bottom heatsink with left A4A2 and right A4A4 tunnel boards and a bracket that secures the heatsink and the cooling fan in the chassis The top heatsink assembly slides over and is held by tracks on the bottom heatsink assembly The bottom heatsink assembly slides over and is held by tracks on insulated blocks at the bottom of the chassis To disassemble the heatsink assembly proceed as follows a Remove the rear panel b Remove the plastic insulator between the rear panel and the heatsin
143. ame plate Name plate Name plate Name plate Name plate Name plate Name plate Name plate Name plate Name plate LCD Display Optical Encoders Rotary V and I controls Keypad PCA Keypad AC line on off switch Heat sink assembly Top Left Tunnel Board Left Tunnel Board Left Tunnel Board Left Tunnel Board Left Tunnel Board Left Tunnel Board Top Right Tunnel Board Right Tunnel Board Right Tunnel Board Right Tunnel Board Right Tunnel Board Right Tunnel Board Bottom Left Tunnel Board same as A4A1 Bottom Right Tunnel Board same as 4 2 Thermistor assy mounted on right hand top side of heat sink assy Strap handle Cap strap handle front Cap strap handle rear Front panel dress Front frame Screw mach M4 x 0 7 6 mm lg pan head ref rear panel xfmr bracket GPIB board Rear panel Cover top Bracket transformer Shroud for heat sink Heat sink ref A4 top and bottom Chassis Jumper assy ref xfmr 1 Cable tie ref bias cable to front bracket Mount cable tie ref front bracket Replaceable Parts 115 Table 5 6 Parts List For 500 Watt 655xA amp 665xA Chassis continued Desig 5041 8801 Foot 0360 2191 Cover terminal block 0361 1240 Rivet blind ref GPIB bracket to chassis 0370 2862 Pushbutton ref sense switch S610 2110 0565 Fuseholder Cap ref XFMR 450 0515 0106 Screw mach x 7 8mm 12 ref bus bar AC gnd shroud to base 0515 1655 Screw mach
144. ams are located in Chapter 6 Table 5 1 is an index to the different parts list tables Table 5 1 Index to Power Supply Assemblies Assembly For 200 Watt Models For 500 Watt Models Table 5 4 Table 5 6 Al Main Board Table 5 5 Table 5 7 A2 Isolator Board for 654xA amp 655xA Only Table 5 8 Table 5 8 Table 5 10 A4AV A4A3 Left Tunnel Board for 655xA amp 665xA Only Table SE A4A2 A4A4 Right Tunnel Board for 655xA amp 665xA only Table 5 12 Model Applicability The title of each table in this section indicates the power supply models covered in the table A separate column called Applicable Models indicates when a part is applicable to only specific models If no entry appears in the Applicable Models column then the part applies to all models covered by the table See Table 5 2 for reference designators and Table 5 3 for abbreviations Table 5 2 Part Reference Designators A assembly J jack SW switch B blower fan K relay T transformer Capacitor L inductor TB terminal block CR thyristor SCR plug U integrated circuit D diode Q transistor VR voltage regulator DSP display LCD R resistor w cable or Jumper Fuse RT thermal resistor Y crystal oscillator Table 5 3 Part Description Abbreviations assy assembly M metric sq square w o without bd board mch machine submin subminiature xfmr transformer belleville mm millimeter thk thick xtal crystal gnd ground mtg mounting thrd thre
145. and 5 12 Change Q202 204 208 302 304 306 and 308 from p n 5060 3314 back to p n 5060 3315 NOTE Do not mix the 5060 3315 FET assemblies with the 5060 3314 FET assemblies in the SAME instrument In Tables 5 5 5 11 and 5 12 Change Q202 204 208 302 304 306 and 308 from p n 5060 3315 to p n 5060 3314 NOTE Do not mix the 5060 3315 FET assemblies with the 5060 3314 FET assemblies in the SAME instrument In Table 5 7 Change Y501 to 12 MHz p n 0410 2109 In Table 5 6 Delete RFI Strip ref Cover top p n 0160 0895 In Table 5 7 Change CR701 to CR700 p n 1884 0349 Also change D691 to D690 p n 1901 1182 Agilent 65 6655 p n 1901 0317 Agilent 1901 0317 Also for Agilent models 65 6655 only change C418 to p n 0160 0168 In Table 5 4 Change Knob ref RPG to p n 0370 1091 Change Optical encoder to p n 0960 0822 Change PCA Keypad to p n 5040 3464 In Table 5 6 Change G1 G2 to p n 0960 0822 Delete PCA Keypad p n 5063 3407 Change Knob A3G1 A3G2 to p n 0370 1091 In Table 5 10 Change U4 to p n 5080 2208 In Table 5 11 Change F201 204 to 0 125A 125V p n 2110 0671 In Table 5 12 Change F301 304 to 0 125A 125V p n 2110 0671 172 Appendix A Index A Antist tic Wrist Stap Q Ue h AS tea ee sip tates eee 8 Agilent 3458A system voltmeter este eee erre HDI 16 Backdating ete PORC e D nO PRU Din REGEM E
146. ard for Agilent Models 654xA and 664xA continued Desig 0698 3160 Resistor 31 6K 1 0757 0442 Resistor 10K 1 125W 0757 0419 Resistor 681 1 125W 0757 0416 Resistor 511 1 125W 65 6641A 65 6642A 0757 0280 Resistor 1K 1 125W 65 6643A 0757 0274 Resistor 1 21K 1 65 6644A 0698 3153 Resistor 3 83K 1 65 6645A 0698 3156 Resistor 14 7K 1 65 6641A 65 6642A 0757 0280 Resistor 1K 1 125W 65 6643A 0757 0274 Resistor 1 21K 1 65 6644A 0698 3153 Resistor 3 83K 1 65 6645A 0698 3156 Resistor 14 7K 1 65 6641A 0812 0083 Resistor 40 5 5W PW 65 6642A 0811 1204 Resistor 200 5 5W PW 65 6643A 0811 1860 Resistor 600 5 5VV PW 65 6644A 0812 0100 Resistor 2K 5 5W PW 6645A 0811 1708 Resistor 7K 5 5W 5W PW 0683 1065 Resistor 10 5 25W 0683 1065 Resistor 10 5 25W 65 6645A 8159 0005 Resistor Zero Ohms 65 6641A 8159 0005 Resistor Zero Ohms 65 6643 A 65 6645A 65 6641A 8159 0005 Resistor Zero Ohms 65 6643 A 65 6645A 8159 0005 Resistor Zero Ohms 0698 6360 Resistor 10 1 0698 6343 Resistor 9K 1 125W 0757 0442 Resistor 10 1 125W 0698 6630 Resistor 20K 1 0698 3156 Resistor 14 7K 1 0698 3156 Resistor 14 7K 1 0683 2255 Resistor 2 2M 5 25W 0757 0279 Resistor 3 16K 1 0757 0441 Resistor 8 25K 1 0698 0082 Resistor 464 1 125W 0757 0449 Resistor 20K 1 125W 0757 0449 Resistor 20K 1 125W All except 6644A 0699 2246 Resistor 25K 05 6644A 0699 2248 Resistor 47 5K 05 6543A 0699 2879 Resistor 80K 05 5PPM 1W 6544A 0699 2198 R
147. ation failed power on and for models 664 amp 665xA also TST See Checksum Error Recovery in the Operating Manual If power loss is not the problem EEPROM A3U6 could be defective after replacing U6 supply must be initialized and calibrated The following four items E4 E7 apply only to Agilent models 664xA amp 665xA supplies E4 PRI XRAM E5 PRI IRAM E6 PRI ROM E7 GPIB E8 SEC E9 SEC ROM EI0 SEC 5 V E11 TEMP E12 DACS Primary interface external RAM test failed power on Primary interface internal RAM test failed power on Primary interface ROM test failed power on and for models 664xA amp 665 also TST GPIB interface test failed power on Secondary interface RAM test failed power on Secondary interface ROM test failed power on and for models 664xA amp 665 also TST Secondary interface 5 volt read back test failed power on and for models 664 amp 665xA also TST Ambient temperature read back test failed power on and for models 664xA amp 665 also TST CV or CC DAC tests failed power on RAM 20108 defective Microprocessor A2U114 defective ROM A2U106 defective Talker listener chip A2U117 defective Microprocessor AIU504 defective Microprocessor AIU504 defective Comparators AIU513 read back DAC 10511 0512 or secondary bias supply defective Thermistor AIRT770 or comparator AIU513 de
148. ations PARD in the output ripple and noise combine to produce a residual AC current as well as an AC voltage superimposed on the DC output Constant current CC PARD is specified as the rms output current in a frequency range 20 Hz to 20 MHz with the supply in CC operation a Turn off the supply and connect the load resistor and rms voltmeter as shown in Figure 2 3 Leads should be as short as possible to reduce noise pick up Use only a resistive load for this test b Check the test setup for noise with the supply turned off Other equipment e g computer DMM etc may affect the reading c Turn on the supply and program the current to full scale and the output voltage to the maximum programmable value see Table 2 3 The output current should be at the full scale rating with the CC annunciator on e Divide the reading on the rms voltmeter by the load resistance to obtain rms current It should not exceed the values listed in the Performance Test Record Form for the appropriate model under CC NOISE RMS Verification 17 3240 VDC MAX IP S LOAD RMS gt RESISTOR SEE TABLE VOLTMETER MODEL LOAD RESISTOR 6541A 6641A 65514 6651A 0 1 OHMS 65524 6652A 300 WATTS 6542A 6545A 6642A 6645A 6553A 6653A 10 OHMS 6554 6654 300 WATTS 6555A 6655A Figure 2 3 CC RMS Noise Measurement Test Setup 18 Verification Table 2 4 Performance Test Record Form Test Facility
149. ator carts Rater verveing 10 personne manua metre and enguh hamiwa Figure 3 20 GPIB Connector and GPIB Board Holding Screws Power Supply Rear View A2 Isolator Board Removal amp Replacement for 654xA amp 655xA Only To remove the Isolator board proceed as follows a b e f g Remove the top cover of the power supply as described under Top Cover Removal and Replacement At the rear of the power supply locate and remove the two 2 screws that hold the Isolator board to the chassis You may need to hold the nuts for these screws stationary while you unscrew the screws The nuts are on the inside of the chassis From the top of the power supply disconnect the phone cable from connector J800 on the A2 board the other end of this cable goes to the main board Disconnect the phone cable from connector J801 on the A2 board the other end of this cable goes to the front panel board Disconnect connector from J803 on the A2 board the other end of this cable goes to the transformer secondary Remove the A2 board from the power supply To reinstall the Isolator board perform the above steps in reverse order Front Panel Assembly Removal and Replacement This procedure removes the front panel assembly from the power supply 8 BU Remove the Power Supply Cover as described earlier in Top Cover Removal and
150. c Sales and Service office for further information on Agilent s full line of Support Programs SAFETY CONSIDERATIONS GENERAL This is a Safety Class 1 instrument provided with terminal for connection to protective earth ground OPERATION BEFORE APPLYING POWER verify that the product is set to match the available line voltage the correct line fuse is installed and all safety precautions see following warnings are taken In addition note the instrument s external markings described under Safety Symbols WARNING Servicing instructions are for use by service trained personnel To avoid dangerous electrical shock do not perform any servicing unless you are qualified to do so BEFORE SWITCHING ON THE INSTRUMENT the protective earth terminal of the instrument must be connected to the protective conductor of the mains power cord The mains plug shall be inserted only in an outlet socket that is provided with a protective earth contact This protective action must not be negated by the use of an extension cord power cable that is without a protective conductor grounding Grounding one conductor of a two conductor outlet is not sufficient protection If this instrument is to be energized via an auto transformer for voltage change make sure the common terminal is connected to the earth terminal of the power source Any interruption of the protective grounding conductor inside or outside the instrument or disconnecting of the
151. citor 5500 40V AL 65 6643A 0180 4438 Capacitor 180UF 63V 65 6644A 0180 4439 Capacitor 68UF 100V 65 6645A 0180 4471 Capacitor 33UF 200V 0160 5422 Capacitor 047UF 20 0160 5422 Capacitor 047UF 20 0160 4812 Capacitor 220PF 5 0160 5422 Capacitor 047UF 20 0160 5422 Capacitor 047UF 20 0160 5422 Capacitor 047UF 20 0160 4832 Capacitor OIUF 10 0160 5422 Capacitor 047UF 20 0160 4832 Capacitor OIUF 10 0180 4136 Capacitor IOUF 20V 0160 4801 Capacitor 100 5 0180 0197 Capacitor 2 2UF 20V TA 0160 4801 Capacitor 100 5 0180 4136 Capacitor IOUF 20V 0160 4830 Capacitor 2200PF 1096 0180 4132 Capacitor 6 8UF 35V 65 6641A 1884 0349 SCR 65 6642A 65 6644A 1884 0340 SCR P O 5060 3376 65 6645A 1884 0340 SCR P O 06645 60002 1901 1098 Diode 1N4150 65 6641A 1901 1152 Power Diode 65 6642 65 6644 5060 3378 Diode Assembly 65 6645A 1901 1087 Diode Power Rectifier 65 6641A 1901 1152 Power Diode assy 65 6642 A 65 6644A 5060 3378 Diode Assembly 65 6645A 1901 1087 Diode Power Rectifier 65 6641A 1901 1152 Power Diode assy 65 6642 65 6644 5060 3378 Diode Assembly 65 6645A 1901 1087 Diode Power Rectifier 65 6641A 1901 1152 Power Diode assy 65 6642A 65 6644A 5060 3378 Diode Assembly 65 6645A 1901 1087 Diode Power Rectifier 65 6641A 5060 3228 Regulator Assembly HS 65 6642 65 6645 1901 1087 Diode Power Rectifier 65 6642A 1901 1087 Diode Power Rectifier 65 6641A 5060 3228 Regulator Assembly HS 1901 1087 Diode Power Rectifier 1901 0
152. ck diagram for the power supply is described and last each functional block shown in the overall block diagram is discussed in detail INTERFACE SIGNALS Figure 4 1 shows the interface signals between the power supply and the end user or other external circuits and devices Table 4 1 describes these interface signals AGILENT POWER SUPPLY TO EXTERNAL COMPUTER AC IP IM tP S IM 5 THESE CONNECTORS ARE USED WITH 664xA amp 665xA MODELS ONLY Figure 4 1 Agilent Power Supply I O Interface Diagram Principles of Operation 81 Table 4 1 Power Supply Interface Signals Pin Signal Description Output Power Connections Busbar or terminal strip screw OUT Positive DC output voltage terminals OUT Negative DC voltage or return 7 Pin I O Analog Connector Rx Tx Serial Link Used with GPIB Models 664xA and 665xA only Pin 1 IP Current Programming Pin 2 Voltage Programming Pin 3 Imon External Current Monitor Pin 4 Imon External Current Monitor Pin 5 VP Programming Common Pin 6 S Sensing Terminal Pin 7 S Sensing Terminal parallel daisy chain fashion both and J2 connectors AC Input Power Source AC power connector J451 Can be 100 V AC 120 V AC 220 V AC or Input AC power 240 V AC TB101 Digital Control DIG CNTL for 664xA and 665xA Models only Pins 1 through 4 Pins through 4 can supply one of three See Table 4 2 f
153. croprocessor and ROM chips which decode and execute all keypad commands which are transferred to the power supply output via the serial I O port to the A2 board GAL chip and isolators and to the secondary interface circuits on the A1 main board The front panel microprocessor circuits also process power supply measurement and status data received on the serial I O port This data is displayed on the LCD Fix KO 0 5 5V BIAS aa KI 0 PCLR CI G2 EEPROM TL rotary FRONT PANEL CONTROLS e MICROPROCESSOR CIRCUITS U3 U4 UB J3 JUMPER BLOCK NOTES ON AGILENT MODELS 664xA 8 665xA THESE SIGNALS GO TO THE A2 GPIB BOARD 2 ON AGILENT MODELS 654xA amp 664xA THESE SIGNALS GO TO THE A2 ISOLATOR BOARD Figure 4 5 Front Panel Board Simplified Block Diagram The EEPROM electrically erasable programmable read only memory chip on the front panel board stores a variety of data and configuration information This information includes calibration constants GPIB address present programming language and model dependent data such as the minimum and maximum values of voltage and current one of the EEPROM storage locations holds a checksum value which is used to verify the integrity of the EEPROM data All Agilent models can be calibrated from the front panel Agilent models 664xA and 665xA can also be calibrated via the GPIB by using SPCI commands see Appendix A in the Operating Manual Access to the calibrat
154. dures and for the meaning of safety symbols appearing in the manual and on the power supply Hazardous voltages exist within the power supply chassis at the output terminals and at the programming terminals Firmware Revisions The supply s firmware resides in the front panel board s ROM chip A3U4 and in the main board s microprocessor chip 504 For models 664xA and 665xA firmware also resides the GPIB board ROM chip A2U106 For GPIB models 664xA and 665xA you can use the IDN query as described in Chapter 3 to get the firmware revision numbers of your power supply s firmware For Agilent models 654xA and 655 the revision number be read from the label affixed atop the IC chip Electrostatic Discharge CAUTION NS 227344 i observe standard antistatic practices can result in serious degradation of performance even if complete failure does not occur When working on the power supply observe all standard antistatic work practices This includes but is not limited to Working at a static free station such as a table covered with static dissipative laminate or with an Agilent 9300 0797 conductive table mat Using a conductive wrist strap such as an Agilent 9300 0969 or an Agilent 9300 0970 wrist strap Grounding all metal equipment at the station to a single common ground Connecting low impedance test equipment to static sensitive components only when those components have power applied t
155. e and Noise Peak to Peak mV 3 mV RMS uV 300 uV Transient Response Time 0 20 mV at 100 us Constant Current Tests Current Programming and Readback Low Current 0 A Iou 60 mA mA 60 mA Front Panel Display Readback Tou 67 MA mA Lu 67 mA High Current 50 A Tou 49 865 50 135 Front Panel Display Readback Tour 142 mA mA Iou 142 mA Current Sink 10 A Display Readback line 135 mA mA IL 135 mA PARD Ripple and Noise RMS 0 mA 25 mA Load Effect To 2 mA mA Tou 2 mA Source Effect La 2 mA mA Tout 2 mA Enter your test results in this column Verification 25 Table 2 11 Performance Test Record for Agilent Model 6552 or 6652A MODEL Agilent Report No Date Test Description Minimum Results Maximum Spec 5 Spec Constant Voltage Tests Voltage Programming and Readback Low Voltage 0 V Vout 10 mV mV 10 mV Front Panel Display Readback Vou 15 mV mV Vou 15 mV High Voltage 20 V Vout 19 978 V V 20 022 V Front Panel Display Readback Vout 29 mV mV Vout 29 mV Load Effect Vou 2 mV mV Vou 2 mV Source Effect Vou 0 5 mV Vou 0 5 mV PARD Ripple and Noise Peak to Peak mV 3 mV RMS uV 300 uV Transient Response Time 0 ______ 20 mV at 100 us Constant Current Tests Current Programming and Readback Low Current 0 A Lut 25 mA mA 25 mA Front Panel Display Readback Tout
156. e appropriate SA table from the troubleshooting flow charts or procedures The following general rules apply to signature analysis testing 1 sure to use the correct test setup connections for the specific test 2 Note the signatures for 5 V and common on the IC being examined If an incorrect signature is the same as that of Vcc or common that pin or point in the circuit is probably shorted to Vcc or ground 3 If two pins have identical signatures they are probably shorted together 4 If two signatures are similar it is only a coincidence 5 Ifa signature is incorrect at an input pin but is correct at its source e g output of previous IC check for printed circuit track or soldering problems 6 Anincorrect signature at an output could be caused by a faulty component producing the output It can also be caused by an input short circuit in another component on the board Note After completing an SA test you must exit the SA mode by turning off power and performing a power on reset Troubleshooting 35 Table 3 2 Self Test Error Codes Messages Code Message Description Probable Cause FP RAM Front panel RAM test failed Microprocessor defective power on E2 FP ROM Front panel ROM test failed ROM A3UA or address latches A3U8 defective power on and for models 664xA amp 665xA also TST E3 EE CHKSM Front panel EEPROM checksum test Possibly due to power loss during a write oper
157. e identified by a new printing date A revised edition incorporates all new or corrected material since the previous printing date First Edition July 1993 Second Edition September 2000 Table of Contents Introduction 5 5 7 sb 7 Conventions Used In Text 7 REVISIONS 8 Safety Considerations ene re aspasia usaba maaa 8 Firmware REVISIONS a 9 gt Electrostatic Discharge 7 258 sn RAGS Tie eh eh ee BOS ee ete ee Se see Ie mre 8 9 Introduction n n RE ERE IER MMM9 9 Test Equipment 2 OE ER EUR ope itr eter rue 9 Measurement Techniques cassis eese d gei oor k Hor e ERE 11 Setup for Most Tests a oi eec RU UU 11 Electronic Load ices etn REED EP REPE an ICI 11 Current Monitoring
158. eshooting 5 1 10504 1 F77H 0504 2 C98P 10504 21 5PC7 A U504 22 5PC7 0504 3 1573 AIU504 23 5PC7 AlU504 4 2 10504 5 UHF8 A U504 6 F5UC 0504 7 UH8C 10504 8 23UC 10504 24 6CAP 10504 25 A319 10504 26 A319 10504 27 A319 A IU504 28 5PC7 10504 9 0000 AIU504 29 1C4C 0504 10 1 A IU504 11 1C4C 0504 12 C76F 10504 13 0042 0504 14 2189 0504 15 1C4C 0504 16 1C45 10504 17 0010 A U504 18 0000 0504 19 1C4C 10504 20 0000 10504 30 0000 0504 31 1C4C 10504 32 0000 10504 33 0000 10504 34 0000 10504 35 0004 10504 36 0UP7 0504 37 UF7P 0504 38 CP47 0504 39 CP47 0504 40 1C4C Troubleshooting Procedures Flow Charts Troubleshooting flow charts for various circuits are given in Figures 3 5 through 3 10 and 3 12 through 3 16 The appropriate flow chart is used when a particular trouble symptom has been encountered during the self test see Table 3 2 or when performing the overall troubleshooting procedures see Figure 3 2 Many flow charts make reference to the test points listed in Chapter 6 The circuit locations of the test points are shown on the schematics Test point locations are shown on the component location diagrams in Chapter 6 Figure 3 5 isolates the fault to components on the GPIB or Isolator board or the front panel board when
159. esistor 14 7K 1 0757 0280 Resistor 1K 1 125W 0698 6977 Resistor 30K 1 125 0698 8671 Resistor 273 2 1 1 65 6641A 65 6642A 0698 8671 Resistor 273 2 1 1 65 6643A 0699 021 Resistor 859 1 65 6644A 0698 5347 Resistor 495 5 1 65 6645A 0699 1982 Resistor 1 055K 1 0698 6320 Resistor 5K 1 125W 0698 6320 Resistor 5K 1 125W 0698 6630 Resistor 20K 1 0698 6630 Resistor 20K 1 0698 6320 Resistor 5K 1 125W 0698 0084 Resistor 2 15K 1 0698 6320 Resistor 5K 1 125W 0698 3156 Resistor 14 7K 1 65 6641A 5080 2217 Shunt 005 Ohms 65 6642A 5080 2218 Shunt 01 Ohms 65 6643A 65 6644A 0811 3770 Resistor 05 Ohm 1 65 6645A 0811 3771 Resistor 25 Ohm 1 0757 0458 Resistor 51 1K 1 65 6641A 65 6642A 0698 3432 Resistor 26 1 1 65 6643A 0757 0316 Resistor 42 2 1 65 6644A 0698 3433 Resistor 28 7 1 65 6645A 0757 0397 Resistor 68 1 1 0698 6977 Resistor 30K 1 125 65 6641A 65 6642A 0698 3432 Resistor 26 1 1 65 6643A 0757 0316 Resistor 42 2 1 65 6644A 0698 3433 Resistor 28 7 1 65 6645A 0757 0280 Resistor 1K 1 125W 65 6641A 0698 0084 Resistor 2 15K 1 65 6642A 0757 0283 Resistor 2K 1 125W 65 6643A 65 6644A 0757 0280 Resistor 1K 1 125W 65 6645A 0757 0279 Resistor 3 16K 1 65 6641A 0698 3162 Resistor 46 4K 1 65 6642A 0757 0459 Resistor 56 2K 1 65 6643A 65 6644A 0698 3160 Resistor 31 6K 1 65 6645A 0757 0459 Resistor 56 2K 1 Replaceable Parts 107 Table 5 5 Parts List 200 Watt A1 Bo
160. esistor 243K 05 6641A 0699 3103 Resistor 19K 05 6642A 0699 2248 Resistor 47 5K 05 6645A 0699 3104 Resistor 250K 125W 6543A 0698 6614 Resistor 7 5K 1 6544A 0698 3988 Resistor 42K 1 6641A 0698 6362 Resistor IK 1 125W 6642A 0698 6631 Resistor 2 5K 1 108 Replaceable Parts Table 5 5 Parts List 200 Watt A1 Board for Agilent Models 654xA and 664xA continued Desig 6645A 0698 6353 Resistor 50K 1 All except 6644A 0699 2246 Resistor 25K 05 6644A 0699 2248 Resistor 47 5K 05 6543A 0699 2879 Resistor 80K 05 5PPM 1W 6544A 0699 2198 Resistor 243K 05 6641A 0699 3103 Resistor 19K 05 6642A 0699 2248 Resistor 47 5K 05 6645A 0699 3104 Resistor 250K 125W 6543A 0698 6614 Resistor 7 5K 1 6544A 0698 3988 Resistor 42K 1 6641A 0698 6362 Resistor 1K 1 125W 6642A 0698 6631 Resistor 2 5K 1 6645A 0698 6353 Resistor 50K 1 65 6641 A 65 6645A 0698 6320 Resistor 5K 1 125W 0757 0481 Resistor 475K 1 0698 4470 Resistor 6 98K 1 0698 4014 Resistor 787 1 125W 0698 3156 Resistor 14 7K 1 0698 3162 Resistor 46 4K 1 0698 6320 Resistor 5K 1 125W 65 6643A 65 6644A 0698 3155 Resistor 4 64K 1 65 6641A 65 6642A 0757 0442 Resistor 10 1 125W 65 6645A 0698 3456 Resistor 287K 1 0698 6343 Resistor 9K 1 125W 0698 8061 Resistor 8 25K 1 0757 0442 Resistor 10 1 125W 0698 6630 Resistor 20K 1 0698 3156 Resistor 14 7K 1 0757 0280 Resistor 1K 1 125W 0698 6977 Resistor 30K 1 125 65 6643A
161. fective CV DAC AIU507 U508 or CC DAC 0509 05 10 defective see Figure 3 10 Note The following error messages can appear due to a failure occurring either while the power supply is operating or during the self test SERIAL TIMEOUT SERIAL DOWN UART PARITY UART FRAMING UART OVERRUN SBUF OVERRUN SBUF FULL EE WRITE ERR SECONDARY DN Serial data line failure on GPIB or isolator board Serial data line failure on GPIB or isolator board UART failed UART failed UART failed Serial buffer failure Serial buffer failure EEPROM write failure Serial data line failure on main board or isolator board See Figure 3 13 See Figure 3 13 ART chip A2U112 defective ART chip A2U112 defective ART chip A2U112 defective SA mode ART chip A2U112 defective or GPIB board is in 36 Troubleshooting USING FRONT KEYS PROGRAM FULL SCALE VOLTAGE CURRENT SEE TABLE 2 3 CHECK VOLTAGE AT SUPPLY S OUTPUT TERMINALS WITH A Ove OUTPUT VOLTAGE HITHIN SPEC Yes VOLTAGE v DISPLAY REPOS WITHIN SPEC YES GO TO DISPLAY TROUBLESHOOTING FIG 3 5 1 CHECK Bl AND CABLE CONNECTION TO 811691 2 CHECK FRN SPEED CONTROL CIRCUIT 910778 AND RSSOCIHTED COMPONENTS SEE FIG 6 5 SHEET i CALIBRATE THE SUPPLY SEE APPENDIX IM OPERATING MANU 1 CHECK AC INPUT AND LINE CORD 2 CHECK UNE FUSE 3 TUR
162. fferences Item 500 Watt Models 655 amp 665xA 200 Watt Models 654 amp 664 Heat sink assembly External to main board Located on main Board Tunnel circuits Two left and two right circuits One left and one right circuit Regulator stages Total of 14 stages Total of seven stages Downprogrammers Total of two One total Each left tunnel circuit has three regulator stages and one downprogramming stage Each right tunnel circuit has four regulator stages Thus there are a total of fourteen regulator stages and two downprogramming stages for the 500 watt models and half this number for the 200 watt models Each regulator stage consists of an amplifier driver and one NPN series regulator Models 6645A 6545A 6555A and 6655A use a MOSFET regulator and no driver The output NPN transistor or MOSFET of each stage is mounted on the heat sink assembly and is connected between the RAIL and the inboard side of the current sampling resistor in the OUT line The conduction of these output transistors is increased or decreased by the OUTPUT CONTROL signal from the CV CC control circuits in order to regulate the output voltage CV mode or the output current CC mode Each downprogramming stage consists of a comparator transistor driver and a downprogramming transistor Each NPN downprogramming transistor is connected between the inboard side of the OUT line and the RAIL The conduction of the downprogramming transistors is controlled by t
163. goes U720 6 low Shutdown circuit Sheet 2 8 1V Shutdown circuit Sheet 2 15 GATED Sheet 2 14 5V 15 GATED Sheet 2 14 5V CV CC DACS ref Sheet 3 10V 0 05V Readback DAC ref Sheet 3 11 58V 0 1 Sheet 2 3 8 5V approximately with FS current programmed CVPROG Sheet 2 3 9 5V approximately with FS voltage programmed The measurements at test points through were taken with full scale voltage and full scale current programmed The measurements were made first in the CV mode with no load and then in the CC mode with the load set for full scale output voltage and current If the CC annunciator is not on set the current to a slightly lower value until it comes on CC control Sheet 2 2 2V in CV mode 25V 6651 54 33V 6655 in CC mode Diagrams 141 Table 6 3 Test Points continued RMOUT Sheet 2 OV in CV mode R659 135V 66514 125V 6652A 195V 6653 18V 6654A 112V 6655 in CC mode IMON Sheet 2 OV in CV mode NEG IMON Sheet 2 OV in CV mode U609 1 9 6 in CC mode IMON circuit Sheet 2 in CV mode U506 1 6 8V in CC mode CC Sheet 2 5V in CV mode U608 14 OV in CC mode CV control Sheet 2 1 15V in CV mode U606 1 10V in CC mode VMON Sheet 2 10V in CV or CC mode FS voltage out CV control Sheet 2 CV Sheet 2 10V in CV or CC mode OV
164. gure 3 8 Output Held Low Troubleshooting Sheet 2 of 2 56 Troubleshooting START OUTPUT HELD HIGH TURN OFF SUPPLY AND REMOVE TOP COVER DISABLE THE OVERVOLTAGE CM CIRCUIT BY SHORTING PINS 1 AND 2 OF A1U700 AND BY LIFTING 8783 TURN ON THE SUPPLY AND CHECK THE SECON DARY BIAy AND REFERENCE VOLTAGES TEST POINTS S THROUGH 77 TABLE 6 3 TROUBLESHOOT THE DEFECTIVE CIRCUIT SEE FIG 6 5 SHEETS 1 AND 2 PROGRAM VOLTAGE AND CURRENT TO 1 2 FULL SCALE VALUES CHECK VOLTAGE AT 1 608 6 25 AND AlUSIO 6 24 WITH RESPECT TO COMMON A1U508 6 47V V65 THROUBLE SHOOT DAC CIRCUIT 1507 U508 SEE FIG 5 18 TROUBLE CC DAC CIRCUIT A1U509 0510 SEE FIG 5 18 YES CHECK IF DIODE A1D615 I CONDUCTING 10615 CONDUCTING NO CHECK AIU606 0615 LOAD OUTPUT TO 5 RATED CURRENT AND CHECK YES DROP ACROS EMITTER RESISTORS ON LEFT BOARDS CHECK OUTPUT CONTROL VOLTAGE AT R686 67 BOARDS A4AVA4A3 R201 8206 216 AND ON RIGHT WITH RESPECT 3 BOARDS A4A2 A4A4 R301 8306 8311 8316 TO ISOLATE DEFECTIVE REGULATOR STAGE SEE FIG 6 6 6 7 A DEFECTIVE STAGE WILL SE CONDUCTING MORE EMITTER CURRENT CHECK A1U607 U610 DISCONNECT CABLES FROM THE TOP TUNNEL BOARDS A4A1 AND 4 2 CHECK TUNNEL CIRCUITS FOR SHORTED SERIES REGULATORS DRIVERS OR AMPLIFIERS U201 0202 U301 AND U302 RECONNECT TUNNE
165. h Limit 20 MHz Probe 1 1 with RF tip RMS Voltmeter True RMS Bandwidth 20 MHz Agilent 3400B Sensitivity 100 Variable Voltage Transformer Adjustable from 13 to 6 of input range Power 1 minimum For 664xA and 665xA models only 10 Verification Measurement Techniques Setup for Most Tests Most tests are performed at the rear terminals of the supply as shown in Figure 2 1 Measure the DC voltage directly at the S and S terminals Set the output for remote sensing and use adequate wire gauge for the load leads as described in Chapter 4 of the Operating Manual Note All tests are performed as follows Set the SENSE switch at the back of the supply to the Remote position Connect the remote sensing leads from OUT to S and from OUT to S Electronic Load Many of the test procedures require the use of a variable load capable of dissipating the required power If a variable resistor is used switches must be used to either connect disconnect or short the load resistor For most tests an electronic load can be used The electronic load is considerably easier to use than load resistors but it may not be fast enough to test transient recovery time and may be too noisy for the noise PARD tests Fixed load resistors may be used in place of a variable load with minor changes to the test procedures in this chapter Also if computer controlled test setups are used the relatively
166. he S terminals b Turn on the supply and program the output voltage to the full scale value and the current to the maximum programmable value see Table 2 3 c Set the load to the Constant Current mode and program the load current to 1 2 the power supply full scale rated current d Set the electronic load s transient generator frequency to 100 Hz and its duty cycle to 50 e Program the load s transient current level to the supply s full scale current value and turn the transient on f Adjust the oscilloscope for a waveform similar to that in Figure 2 2 g The output voltage should return to within 0 1 or 20 mV whichever is greater of the nominal value in less than 100 microseconds Check both loading and unloading transients by triggering on the positive and negative slope UNLOADING TRANSIENT 20 mV OR 0 1 1 SEE TABLE 2 3 NOMINAL VOLTAGE 20 mV OR 01 SEE TABLE 2 3 LOADING TRANSIENT Figure 2 2 Transient Response Wavetorm Constant Current CC Tests CC Setup Follow the general setup instructions in the Measurement Techniques paragraph and the specific instructions given in the following paragraphs Current Programming and Readback Accuracy This test verifies that the current programming and readback are within specification The accuracy of the current monitoring resistor must be 0 04 or better a b Turn off the supply and connect the current monitoring resis
167. he A1 Main Board must also be removed Refer to Board and Front Panel Assembly Removal and Replacement Instructions as required Once the front panel assembly and also Al main board for 200 Watt models is removed proceed as follows 78 Troubleshooting a In the supply chassis remove the two screws three screws for 6x4xA securing the transformer to the bottom of the chassis At the front of the chassis remove the two screws securing the transformer to the chassis Use long nose pliers to disconnect all wires going to the transformer terminals d Lift the transformer out of the chassis Note The AC power connections at the transformer secondary are model dependent Be sure to note the color code of the wires and the respective terminals the wires connect to for subsequent reconnection XFMR XFMR BRACKET MOUNTED AT CHASSIS BOTTOM REMOVE THESE SCREWS Figure 3 23 Location of XFMR Holding Bracket at Bottom of Chassis INSIDE VIEW OF TRANSFORMER HOLDING SCREWS SEEN WITH FRONT PANEL ASSEMBLY REMOVED Figure 3 24 Location of XFMR Holding Screws Inside View Troubleshooting 79 Principles of Operation Introduction This section describes the different functional circuits used in the power supply models covered in this manual The topics are presented in the following order First the I O external signals that connect to the Agilent power supply are described Next the overall blo
168. he DP CONTROL signal from the CV CC control circuits Conduction is increased when the output is downprogrammed to shunt current away from the load thus allowing faster downprogramming The SCR connected across the output will fire and short the output when an overvoltage condition is detected The SCR is controlled by the OV signal from the SCR control circuit as described under Control Circuits Resistor R657 monitors the output current Control Circuits The control circuits are shown across the bottom of Figure 4 4 and consist of the CV CC control output voltage current monitor bias supplies and SCR control All of these circuits are located on the Al main board The CV CC control circuits provide a CV control loop and a CC control loop For any value of load resistance the supply must act either as a constant voltage CV or as a constant current CC supply Transfer between these modes is accomplished automatically by the CV CC control circuit at a value of load resistance equal to the ratio of the programmed voltage value to the programmed current value low level or CC signal is returned to the secondary interface to indicate that the corresponding mode is in effect 86 Principles of Operation SOPR EAn 1no HOLINON 909 HO1INON AX 3ovroA NO C 54 s gt Woudrot AERE Ig E09 009n 0
169. initialization For 664 amp 665xA models the program in Figure 3 17 can be run to reinitialize the supply This program contains statements for several different Agilent models You can shorten and thus customize this program for just your specific model by deleting the statements from this program listing that apply to models that you do not use Transferring Calibration Constants Into Factory Preset Locations This will allow you to recover the new calibration constants using the FACTORY PRESET CAL jumper as described previously Being able to recover the calibration constants could be important in the future if you have trouble calibrating the supply Having the FACTORY PRESET CAL constants available will allow you to operate the supply and or re calibrate as required After you have initialized and calibrated the supply transfer the calibration constants into the FACTORY PRESET CAL locations by again running the program listed in Figure 3 17 This time when the program pauses for you to make the selection select Factory Preset Replacement F After you select F the program will continue and transfer the newly obtained calibration constants into the proper locations of the new EEPROM 66 Troubleshooting 10 Program to initialize EEPROM or move factory preset data in 654xA 20 1 664xA 655xA and 665xA power supplies 30 RE STORE INIT ps 40 Rev A 00 00 dated Mar 30 1993 50 60 DIM Init data 1 45 Model 5
170. ion data in the EEPROM Principles of Operation 89 is controlled by the combination of a password and jumper options header A3J3 located on front panel board see Calibration in the Operating Manual In addition for models Agilent 664xA and 665xA the front panel EEPROM can be updated from the GPIB interface whereas the memory circuits used in models Agilent 654xA and 655xA cannot be programmed via the GPIB interface If the EEPROM should fail in models 654xA and 655xA two options exist The first option is to replace the front panel board with another front panel board having an EEPROM already preprogrammed from the factory The second option is to reprogram the new EEPROM using an auxiliary GPIB board available from the Agilent Technologies Sales and Support Office Note The EEPROM for each power supply model is programmed with unique data during initialization Jumper block A3J3 is located on the front panel board This jumper block is strapped differently according to the service testing and or calibration to be performed The connections on the A3J3 jumper block are as follows FAC CAL Loads memory with initial factory values from EEPROM for calibration purposes No password is required this permits the password requirement to be overridden INH CAL Inhibits calibration SA MODE Used with signature analysis troubleshooting NORMAL Normal operation As shipped from the factory this jumper block is connected for normal ope
171. ions 2660 2670 2680 2690 Cal off 2700 CLEAR SCREEN 2710 OUTPUT GPs CAL STATE OFF Turn off cal mode 2720 2730 GOSUB Ps error Check for errors 2740 IF Err THEN 2750 PRINT An error occurred during the EEPROM read write Check for 2780 PRINT programming errors Initialization data may be incorrect 2770 STOP 2780 ENDIF 2790 2800 PRINT Operation complete Program stopped 2810 STOP 2820 Ps error Error handling subroutine 2840 OUTPUT Ps SYST ERR Check for errors 2850 ENTER Ps Err 2860 RETURN 2870 END Figure 3 17 Initialization and Factory Preset Replacement Program Listing Sheet 6 of 6 Disassembly Procedures The following paragraphs provide instructions on how to disassemble various components of the power supply Once disassembled the components can be reassembled by performing the disassembly instructions in reverse order SHOCK HAZARD To avoid the possibility of personal injury turn on AC power and disconnect the line cord before removing the top cover Disconnect the GPIB cable for 664xA amp 665xA models and any loads and remote sense leads before attempting disassembly CAUTION Most of the attaching hardware is metric Use of other types of fasteners will damage threaded inserts Refer to the list of required tools when performing disassembly and replacement 72 Troubleshooting R4R1 LEFT TUNNEL BOAR JOP HERISIK 8482 RIGHT TU
172. ipment Required Table 2 2 lists the equipment required to perform the verification tests SHOCK HAZARD The test should only be performed by qualified personnel During the performance of these tests hazardous voltages may be present at the output of the supply Verification 9 Table 2 2 Test Equipment Required for Verification Required Characteristics Recommended Model Current Monitor Resistor 100 A 0 01 Q 0 04 for Agilent Guildline 9230 100 6541A 6551A 6552A 6641A 6651A amp 6652 models 15 0 10 0 04 for Agilent Guildline 9230 15 6542A 6543A 6544 6545A 6553A 6554A 6555A 6642A 6643A 6644A 6645A 6653A 6654A 6655A models DC Power Supply 5 0 Agilent 66 Agilent 42 6653 Digital Voltmeter Resolution 10 nV 1 V Agilent 3458A Readout 8 1 2 digits Accuracy 20 ppm Electronic Load Voltage and current range must Agilent N3300A mainframe with exceed range of supply under test Agilent N3306A 60 V plug in Power range 250 W minimum module or Agilent N3305A 150 V plug in module GPIB Controller Full GPIB capabilities Agilent 82350B Load Resistor 0 1 Q 5 300 W for Agilent Ohmite C300KRIO 6541A 6641A 6551A 6651A 65524 6652A models 1 0 59 300 W for Agilent Ohmite C300KIRO 6542A 6543A 6544A 6545A 6553A 6554A 6555A 6642A 6643A 6644A 6645A 6653A 6654A 6655A models Oscilloscope Sensitivity 1 mV Agilent Infiniium Bandwidt
173. istor 0 39 5 3W 65 6644A 0811 3847 Resistor 0 66 1 3W 65 6645A 0811 1220 Resistor 1 5 5 3W PW 0698 3430 Resistor 21 5 1 65 6641 A 65 6644A 0698 3441 Resistor 215 1 0 125W 0757 0280 Resistor 1K 1 125W 65 6641 A 65 6644A 0698 3454 Resistor 215K 1 65 6645A 0698 8827 Resistor 1M 1 125W 0757 0280 Resistor 1K 1 125W 0683 0475 Resistor 4 7 5 25W 0683 0475 Resistor 4 7 5 25W 65 6641A 0811 3849 Resistor 0 25 5 3W 65 6641A 0811 3849 Resistor 0 25 5 3W 65 6641A 0811 3849 Resistor 0 25 5 3W 65 6641A 0811 3849 Resistor 0 25 5 3W 65 6641A 65 6642A 0811 3849 Resistor 0 25 5 3W 65 6643A 0811 3848 Resistor 0 39 5 3W 65 6644A 0811 3847 Resistor 0 66 1 3W 65 6645A 0811 1220 Resistor 1 5 5 3W PW 0698 3430 Resistor 21 5 1 65 6641 65 6644 0698 3441 Resistor 215 1 125W 0757 0280 Resistor 1K 1 125W 65 6644A 0698 3459 Resistor 383K 1 65 6645A 0698 3454 Resistor 215K 1 65 6641A 65 6642A 0811 3849 Resistor 0 25 5 3W 65 6643A 0811 3848 Resistor 0 39 5 3W 65 6644A 0811 3847 Resistor 0 66 1 3W 65 6645A 0811 1220 Resistor 1 5 5 3W PW 0698 3430 Resistor 21 5 1 65 6641 A 65 6644A 0698 3441 Resistor 215 1 125W 0757 0280 Resistor 1K 1 125W 65 6641 A 65 6643A 0698 3454 Resistor 215K 1 65 6644A 0757 0470 Resistor 162K 1 65 6645A 0757 0469 Resistor 150K 1 65 6641A 65 6642A 0811 3849 Resistor 0 25 5 3W 65 6643A 0811 3848 Resistor 0 39 5 3W 65 6644A 0811 3847 Resistor 0 66 1 3W 65 6645A 0811 1220 Resistor 1 5 5 3W PW 0698 3
174. ith normal interface operation or cause the output to change are not performed by TST The return value of TST will be zero if all tests pass or the error code of the first test that failed The supply will not display error codes and will continue to attempt normal operation if TST returns a nonzero value 34 Troubleshooting Signature Analysis The easiest and most efficient method of troubleshooting microprocessor based instruments is signature analysis SA The SA technique is similar to signal tracing with an oscilloscope in linear circuits Part of the microprocessor memory is dedicated to signature analysis and a known bit stream is generated to stimulate as many nodes as possible within a circuit However because it is virtually impossible to analyze a bit stream with an oscilloscope a signature analyzer is used to compress the bit stream into a four character signature By comparing the signatures of the IC under test to the correct signatures for each node faults can be isolated to one or two components Signature analysis tests are provided for some of the digital circuits on the front panel board the secondary interface circuits on the main circuit board and for models 664 amp 665xA the GPIB primary interface board The GPIB primary interface SA tests are given in Table 3 3 SA tests for the front panel are given in Table 3 4 and the secondary interface SA tests are given in Table 3 5 References are made to th
175. itialize certain primary interface circuits and front panel circuits when the unit is turned on Isolator Board Circuits for Agilent Models 654xA and 665xA Only Figure 4 7 The isolator board performs the following two functions 1 Creates a 5 bias voltage 2 Provides isolation between the PCLR RxD and TxD front panel signals and similar signals received from the A1 Main Board Principles of Operation 91 When power is turned on to the power supply an isolated AC signal from XFMR TI in the secondary circuits is applied to a 5 V bias supply U805 on the isolator board The bias supply produces a 5 V BIAS output voltage that is routed to the front panel circuits At the same time a low SPCLR level from the secondary circuits is applied to optical isolator circuit 0800 It is then routed as a low PCLR level to the RESET input of the front panel microprocessor This low level keeps the microprocessor temporarily disabled during power turn on for a short time interval After a time delay of 40 ms SPCLR goes high and the microprocessor is enabled By inhibiting microprocessor operation for 40 ms any erroneous operation due to a rising but yet unstable 5 V is prevented until the 5 V BIAS voltage fully settles When power is turned off or is removed SPCLR goes low immediately and disables the microprocessor in order to provide a graceful shut down of the power supply as the 5 V falls to zero volts See Figure 4 8 which shows
176. ity 6 5 95 How Order Parts 95 ec EE 137 Introduction EHE c 137 InterconnectlonS 137 AC Input and Transformer Connections titre 137 Circuit Board Schematics iecore asispa ton ie DEG 137 Component Location DISeramsS n I 137 Test ub 139 ENUEIBIETO I EUTIARO EVITE RAPERE 169 lung _ 33 _ __ ____ _ _ _23 32 2 3 __ _ __ _ _ 173 Introduction Scope This manual contains information for troubleshooting and repairing four generic models of Agilent power supplies The different power supply models described in this manual are listed in Table 1 1 Note The information provided in this manual applies to all Agilent models listed in Table 1 1 Where differences exist among any of the models these differences are explained in text For installation operation programming and calibration procedures refer to the appropriate Operating Manual as listed in Chapter 2 Table 2 1 For information in determining the performance level of the power supply either before or after repair refer to Chapter 2
177. k assembly Remember to replace this insulator when you reassemble the heatsink Troubleshooting 77 c Disconnect cables W11 W12 and W15 W16 from connectors 7201 7202 and 7301 7302 on top left and on top right tunnel boards respectively d Remove the top heatsink assembly and the attached tunnel boards by sliding the top assembly towards the rear and off of the bottom heatsink assembly Remove the plastic insulator between heatsink fan bracket and the heatsink assembly Remember to replace this insulator when you reassemble the heatsink e Disconnect cables W13 W14 and W17 W18 from connectors J201 J202 and J301 J302 on the bottom left and on the bottom right tunnel boards f Remove the bottom heatsink assembly and the attached tunnel boards by sliding the bottom assembly towards the rear of the insulated blocks in the chassis A4A1 or A4A3 Left Tunnel Board Removal and Replacement To separate a left tunnel board from its heatsink proceed as follows Note If desired you can replace a heatsink mounted transistor Q201 Q203 Q205 and Q207 without separating the board from the heatsink Apply a thermal compound to the heatsink insulator when replacing the transistors Remove the heatsink assembly as described above b Remove the screws two each securing transistors Q201 Q203 Q205 and Q207 to the heatsink assembly and the left tunnel board c Unplug each transistor from the socket on the board and separate the board fro
178. l assembly as described under Front Panel Assembly Removal and Replacement Once you have access to the front panel board perform these steps Note Be careful not to unscrew the knob set screws too far out as they can easily fall out of the knob and become lost Use a small allen wrench 0 050 to loosen the set screws inset in the knobs Remove knobs and shaft bushings b Remove the holding screw if installed that secures the board to the front panel assembly The screw is located near J4 on the front panel board Inorder to remove the board itself from the assembly you must slide the board to the left to disengage the holding clips To do this first lift up the restraining tab on the circuit board and then slide the board to the left and lift it out d Disconnect display ribbon connector J2 The other end of this cable goes to the display panel DO NOT remove cable at display end Note When reinstalling the front panel board be sure to line up the stripe of the ribbon cable with pin 1 on J2 76 Troubleshooting dua UFT TAB AND PUSH TO THE LEFT COMPONENT SIDE VIEW Figure 3 22 Location of Front Panel Board Holding Screw and Restraining Tab A1 Main Board a Remove the top cover and the A2 board Isolator or GPIB board b Disconnect all cables going to connectors on the main board Note Be sure to mark any or all cables prior to removal so that no mistake is made later when reinst
179. leshooting 49 between pins 13 3 73 4 and return it to the NORM position between pins J3 7 and 13 8 in order to calibrate the supply Calibration Password In order to enter the calibration mode you must use the correct password as described in Appendix A of the Operating Manual As shipped from the factory the supply s model number e g 6652 is the password If you use an incorrect password PASSWD ERROR will appear on the display for front panel calibration or error code 2 occurs for GPIB calibration and the calibration mode will not be enabled If you have changed the password and have forgotten it you can recover the calibration function by restoring the factory preset calibration constants To do this proceed as follows a b e Turn off the supply and remove the top cover Install jumper in test header J3 on the front panel board A3 in the FACTORY PRESET CAL position between pins J3 5 and J3 6 See Figure 3 3 Turn on the supply and note that ADDR 5 and then PWR ON INIT appear briefly on the front panel display When PWR ON INIT no longer appears on the display the supply s factory calibration constants have been restored and the password has been changed to 0 defeating password protection You can now turn off the supply remove the jumper and return it to the NORM position between pins J3 7 and J3 8 See Figure 3 3 Turn on the supply At this point you can set a new password if desired and
180. ller and is set to the primary GPIB address The remaining supplies are programmed to secondary addresses and are linked daisy chained together via the J1 J2 phone jacks on the rear of each supply 90 Principles of Operation PRIMARY INTERFACE PROGRAMMED GAL SERIAL UNK ORCUITS juna INTERFACE REFERENCED REFERENCED TOCMASSS SUPPLY GAQUND COMMON DIGITAL CONTROL INTERFACE UTD UW FLTANH DIG VQ OR RELAY LINK NOTE TOIFROM FRONT PANEL GACUTS t JUM PER INFORMATION Figure 4 6 GPIB Board Simplified Block Diagram Models Agilent 664xA and 665xA Only Terminal strip TB101 can be strapped to provide one of four digital input output control signals see Table 4 4 The Power Supply Operating Manual describes how to select one of these three sets of signals As shipped from the factory this terminal strip is connected for FLT output and INH input Refer to the Operating Manual for operating instructions Table 4 4 TB101 Terminal Strip Digital CNTL Signals PIN Digital Relay Link Fault Isolation OUT 0 RLY SEND FLT Output OUT 1 NC FLT Common IN OUT 2 RLY RTN INH Input Common Common INH Common The bias supply 5 V reference to earth ground for the primary interface circuits is located on the A2 board It also provides the bias voltage to operate the circuits located on the front panel board the LCD and the keypad A power clear signal PCLR is generated to in
181. ls 654xA and 664xA continued 9990 1826 1896 IC Linear 1826 1370 IC 365 5060 3321 Regulator 1826 0126 5060 3320 Regulator 1826 0122 5060 3229 Regulator 1826 0214 65 6641 65 6644 1826 1533 34072 1826 2252 OP270GP 1826 1878 72 1826 1533 34072 1826 1370 365 1826 1533 34072 1826 1533 34072 1990 0543 Optical isolator 1826 0468 IC MC3423PI 1858 0047 XSTR ARY 16P DIP 1858 0076 XSTR ARY 14P DIP 1858 0077 XSTR ARY 14P DIP 1902 0958 Diode Zener 10 5 1902 0958 Diode Zener 10 5 65 6642 1902 0958 Diode Zener 10 5 65 6642 1902 0958 Diode Zener 10 5 1902 0947 Diode Zener 3 6 5 1902 0947 Diode Zener 3 6 5 1902 0955 Diode Zener 7 5V 5 1902 0958 Diode Zener 10 5 0410 2109 XTAL 12 000 MHZ 1902 0958 Diode Zener 10 5 1902 0958 Diode Zener 10 5 1902 0947 Diode Zener 3 6V 5 1902 0947 Diode Zener 3 6V 5 1902 0955 Diode Zener 7 5V 5 1902 0958 Diode Zener 10 5 Replaceable Parts 113 Table 5 6 Parts List For 500 Watt 655xA amp 665xA Chassis Reference Applicable Desig Models 65 6651A 65 6652A 65 6653A 65 6654A 65 6655A 65 6651 65 6652 65 6653 65 6655 65 6651 65 6653 65 6654 65 6655 65 6651 65 6653 65 6654 65 6655 65 6651 65 6652A 65 6655A 65 6651A 65 6652A 65 6653A 65 6654A 65 6651A 65 6652A 65 6653A 65 6654A 65 6655A 6551A 6555A 6651A 6655A 6651A 6655A 6551A 6552A
182. m the heatsink Note that transistor Q205 is insulated from the heatsink Be sure that insulator is installed before replacing Q205 A4A2 or A4A4 Right Tunnel Board To separate a right tunnel board from its heatsink proceed as follows Note If desired you can replace a heatsink mounted transistor Q301 Q303 Q305 or Q307 without separating the board from the heatsink Apply a thermal compound to the heatsink insulator before you replace any transistors a Remove the heatsink assembly as described above If you are separating the board from the top heatsink assembly unplug the thermistor cable from the J300 connector on the board b Remove the screws two each securing transistors Q301 Q303 Q305 and Q307 to the heatsink assembly and the right tunnel board c Unplug each transistor from the socket on the board and separate the board from the heatsink assembly B1 Fan Removal and Replacement Remove the top cover as described under Top Cover Removal and Replacement a Disconnect the fan cable from J601 on the Al main board b For 500 watt 6x5xA models only remove the A4 heatsink assembly as described previously c Remove the screws securing the fan to the heat sink assembly and remove the fan T1 Power Transformer Removal and Replacement To remove the power transformer the front panel assembly must first be removed to gain access to the bracket screws that hold the transformer in place For 654xA and 664xA models t
183. ncluded in Agilent Technologies Inc s product price only if Customer pays Agilent Technologies Inc international prices defined as destination local currency price or U S or Geneva Export price If Agilent Technologies Inc is unable within a reasonable time to repair or replace any product to condition as warranted the Customer shall be entitled to a refund of the purchase price upon return of the product to Agilent Technologies Inc LIMITATION OF WARRANTY The foregoing warranty shall not apply to defects resulting from improper or inadequate maintenance by the Customer Customer supplied software or interfacing unauthorized modification or misuse operation outside of the environmental specifications for the product or improper site preparation and maintenance NO OTHER WARRANTY IS EXPRESSED OR IMPLIED AGILENT TECHNOLOGIES INC SPECIFICALLY DISCLAIMS THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE EXCLUSIVE REMEDIES THE REMEDIES PROVIDED HEREIN ARE THE CUSTOMERS SOLE AND EXCLUSIVE REMEDIES AGILENT SHALL NOT BE LIABLE FOR ANY DIRECT INDIRECT SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES WHETHER BASED ON CONTRACT TORT OR ANY OTHER LEGAL THEORY ASSISTANCE The above statements apply only to the standard product warranty Warranty options extended support contracts product maintenance agreements and customer assistance agreements are also available Contact your nearest Agilent Technologies In
184. ndary Interface Circuits on the A1 Main Board Output Power and Control Circuits on the A1 Main Board A3 Front Panel Board Circuits part of the Front Panel Assembly Either the A2 GPIB Board Circuits primary interface for models 664xA and 665 or the A2 Isolator Board Circuits for models 654xA or 655xA gt gt gt In addition for all models the primary power transformer is mounted inside and at the bottom of the power supply chassis Note the following comments regarding circuit differences in Figure 4 2 1 In the 200 watt models 654xA and 664 the heat sink assembly is part of the Al main board But in the 500 watt models 655xA and 665xA the heat sink assembly is external to the Al Main Board mounted at the bottom of the power supply chassis itself 2 Inthe 200 watt models 654xA and 664xA separate switches located on the main board are used to set the appropriate input AC voltage In the 500 watt models 655xA and 665xA appropriate wire connections at the power transformer are set according to the applied input AC voltage 3 In models 664xA and 665xA the A2 Board is the GPIB board and a GPIB interface connector is used to transfer data between the power supply and an external computer In models 654xA and 655xA the A2 Board is the A2 Isolator Board and the GPIB connector primary interface is not applicable 4 Other differences across Agilent models are described in the text Detailed Block Diagram Disc
185. ne L101 9100 1610 Inductor 150nH 20 P101 1251 4245 Connector plug 2 pin ac bias 0101 1853 0089 Transistor PNP 2N4917 R103 0757 0442 Resistor 10 1 0 125W R104 0698 3155 Resistor 4 64K 1 R105 0683 1065 Resistor 10 M 5 0 25 W R106 0698 4037 Resistor 46 40 1 R107 0698 0082 Resistor 464Q 1 0 125 W R108 0757 0401 Resistor 100Q 1 0 125 W R109 0698 0082 Resistor 4640 1 0 125 W R111 114 0698 3155 Resistor 4 64K 1 R115 117 0698 4037 Resistor 46 4 1 R118 0757 0280 Resistor IK 1 0 125 W R119 0698 8827 Resistor 1 0 125 W R120 122 0698 3155 Resistor 4 64K 1 R123 0698 0082 Resistor 464Q 1 0 125 W R130 133 0698 3155 Resistor 4 64K 1 R134 0683 1015 Resistor 1000 5 0 25 W R135 136 0698 3155 Resistor 4 64K 1 R137 0757 0401 Resistor 100Q 1 0 125 W TB101 0360 2312 Terminal block digital control 0101 1826 0468 IC MC3423PI U106 5080 2152 IC ROM GPIB U108 1818 4111 IC MCM 6164C55 U109 1820 6789 IC interface U110 111 1990 0444 IC Opto isolator U112 1820 3210 IC 68B50 U113 1990 0543 IC Opto isolator 0114 1820 6721 IC MPU U115 ILH4 0001 IC GPIB transceiver 0116 1820 2724 SN74ALS573BN 0117 1820 2549 8291 0118 1820 4185 IC interface 0119 5080 2153 IC GAL programmed GPIB U120 5080 2154 IC GAL programmed GPIB U121 1820 0430 IC LM309K VRIOI 1902 0766 Diode zener 18 2V 5 102 1902 0959 Diode zener 11V 5 VR103 104 1902 0049 Diode zener 6 19V 5 101 1258 0209 Jumper Y101 0410 2109 Crystal oscillator 12 000 MHz
186. nob Ref RPG 0370 2862 Pushbutton 0380 0181 Spacer round 75 IN REF fan mounting 0380 1524 HEX standoff 8 MM REF Isolator PCA 0960 0912 Optical encoder front panel board 1000 0842 Window 1531 0309 Clevis 5062 3974 Rack mounting kit 5062 3975 Rack mounting kit w handles 06632 60002 Fan assembly 5001 6787 Shim Ref XFMR MTG 5001 6788 XFMR bracket 5041 8801 Foot 65 6641A 9100 4963 power bias 65 6642A 9100 4964 XFMR power bias 65 6643A 9100 4965 power bias 65 6644A 9100 4966 power bias 65 6645A 9100 4967 power bias 5060 3364 Chassis assembly 1252 3698 Connector 3101 2862 Rocker switch 001 5080 2204 AC cable assembly 5080 2205 Primary cable assembly 65 6642 65 6645 5080 2206 Secondary power cable 65 6641A 06641 80002 Secondary power cable 5080 2213 Bias cable 5080 2209 GPIB power cable assembly 06652 80010 6 Conductor phone cable 06652 80011 6 Conductor phone cable 5080 2261 Cable assembly LCD display 5001 0538 Side Trim 5001 6765 Front panel 500 1 6769 Cover 5001 6775 Plate cover Ref 654xA rear panel 5040 1665 Keypad 5063 3407 PCA Keypad 5040 1687 Front frame 5040 1700 Molded collar Ref RPG 5041 8819 Strap Cap handle front 5041 8820 Strap Cap handle rear 5061 1190 LCD display 5062 3703 HDL strap assembly 1252 3698 Connector 2110 0010 Fuse 5AM 250V for 120 V operation 2110 0565 Fuse holder Ref F450 2110 0056 Fuse 6AM 250V for 100 V operation 2110 0003 Fuse 3AM 250V for 220 V operation 664xA
187. nstrument uses components which can either be damaged or suffer serious performance CAUTION degradation as a result of ESD electrostatic discharge Observe the standard antistatic precautions to avoid damage to the components An ESD summary is given in Chapter 1 Introduction This chapter provides troubleshooting and repair information for the power supply Before attempting to troubleshoot the power supply first check that the problem is with the supply itself and not with an associated circuit The verification tests in Chapter 2 enable you to isolate a problem to the power supply Troubleshooting procedures are provided to isolate a problem to one of the circuit boards or a particular circuit Figure 3 1 shows the location of the circuit boards and other chassis mounted components within the power supply Once a problem has been isolated to a circuit board additional troubleshooting procedures are available to isolate the problem to the defective component s Disassembly procedures are provided at the end of this chapter and should be referred to as required in order to gain access to and or replace defective components If a component is defective replace it and then conduct the verification test given in Chapter 2 Note Note that when certain components are replaced the supply must be re calibrated see Post Repair Calibration later in this chapter If the EEPROM chip U6 on the A3 Front Panel Board is replaced the s
188. nto Factory Preset 66 Disassembly Procedures i a nD t ete 72 Lastof Required 74 Top Cover Removal amp Replacement M 74 2 GPIB Board Removal amp Replacement for 664 amp 665xA Models 74 A2 Isolator Board Removal amp Replacement for 654xA amp 655xA eene 75 Front Panel Assembly Removal and esee eene nennen enne tren nein retentis 75 S1 Line Switch Removal and Repl3ac ement 76 Front Panel Board Removal and 76 AL S 77 4 Heatsink Assembly 500 Watt Models 6x5xA Only TI A4A1 or A4A3 Left Tunnel Board Removal and Replacement sse nennen 78 IAN or A4A4 Right Tunnel isso oett esce pete iR Pe Ho e ete acte dpt 78 B1 Fan Removal 78 Power Transformer Removal and Replacement sees rennen rene ener 78 Principles Of Operation C
189. o them Removing power from the power supply before removing or installing printed circuit boards 8 Introduction Verification Introduction This Chapter contains test procedures to verify that the Agilent Power Supply is operating normally There are three types of tests as follows Test Description Built In Self Tests These tests are run automatically when the power supply is turned on Operation Verification These tests verify that the power supply is operating normally but the tests do not check all specified operating parameters Performance Tests These tests check that the supply meets all of the operating specifications as listed in the Operating Manual Note The power supply must pass the built in self tests before the tests in this chapter can be performed If the supply fails the self test refer to the overall troubleshooting procedures in Chapter 3 of this manual If any failures are encountered or if abnormal test results are observed refer to the Troubleshooting Procedures in Chapter 3 of this manual The troubleshooting procedures will determine if repair and or calibration is required Calibration procedures are given in Appendix A of the appropriate Operating Manual Table 2 1 Applicable Agilent Power Supply Operating Manuals For Agilent Model Operating Manual Part Number _ GPIB Models 664xA amp 665 5964 8267 Analog Programmable Models 654 amp 655xA 5959 3374 Test Equ
190. odel under CV SOURCE EFFECT CV Noise PARD Periodic and random deviations PARD in the output ripple and noise combine to produce a residual AC voltage superimposed on the DC output voltage CV PARD is specified as the rms or peak to peak output voltage in a frequency range from 20 Hz to 20 MHz a Turn off the supply and connect the output as shown in Figure 2 1 to an oscilloscope AC coupled between the and the terminals Set the oscilloscope s bandwidth limit to 20 MHz and use an RF tip on the oscilloscope probe b Turnon the supply and program the current to the maximum programmable value and the output voltage to the full scale value see Table 2 3 Adjust the load for the full scale current value see Table 2 3 as indicated on the front panel display d Note that the waveform on the oscilloscope should not exceed the peak to peak limits in the Performance Test Record Form for the appropriate model under CV NOISE PARD e Disconnect the oscilloscope and connect an AC rms voltmeter in its place The rms voltage reading should not exceed the RMS limits in the Performance Test Record Form for the appropriate model under CV NOISE PARD e 14 Verification Transient Recovery Time This test measures the time for the output voltage to recover to within the specified value following a 50 change in the load current a Turn off the supply and connect the output as in Figure 2 1 with the oscilloscope across the S and t
191. or these I O signals sets of signals and pin destinations GPIB Interface Connector Used With Agilent Models 664xA and 665xA only GPIB IEEE multi pin connector signals See IEEE 488 type connector provides Chapter 6 Figure 6 3 Sheet 2 Zone 8A the interface between an external for these signals computer and the GPIB board and J2 Connectors wired in 3 lines Rx Tx and common signals for and J2 are telephone connectors For the 500 watt Agilent 655xA and 665xA models the OUT and OUT signals connect to bus bar type screw terminals For the 200 watt Agilent 654xA and 664xA models these connections are made at a terminal strip on the power supply A switch on the Al Main Board selects either Remote sensing or Local sensing of the output voltages OUT and OUT leads to be monitored The Rx and Tx serial link permits up to 16 Agilent power supplies to be connected in a daisy chain fashion each with its own unique programmed device address One GPIB address with other units being subaddressed 82 Principles of Operation Table 4 2 Digital CNTL Signals PIN Digital I O Relay Link Fault Isolation Pin 1 OUT 0 RLY SEND FLT Output Pin2 OUT 1 NC FLT Common Pin 3 IN OUT 2 RLY RTN INH Input Pin 4 Common Common INH Common Overall Block Diagram Figure 4 2 of the Agilent Technologies power supplies covered in this service manual consist of four major functional circuit groups They are Seco
192. otect against damage to the instrument This sign indicates hazardous voltages This sign indicates an earth terminal sometimes used in the manual to indicate circuit common connected to a ground or mle chassis The WARNING sign denotes a hazard It calls attention to a procedure practice or the like which if not correctly performed or adhered to could result in personal injury Do not proceed beyond a WARNING sign until the indicated conditions are fully understood and met The CAUTION sign denotes a hazard It calls attention to an operating procedure or the like which if not correctly CAUTION performed or adhered to could result in damage to or destruction of part or all of the product Do not proceed beyond a CAUTION sign until the indicated conditions are fully understood and met Safety Symbol Definitions Symbol Description Symbol Description Direct current Terminal for Line conductor on permanently installed equipment Alternating current Caution risk of electric shock Both direct and alternating current d Caution hot surface qr Sue Three phase alternating current Caution refer to accompanying documents Earth ground terminal In position of a bi stable push control Protective earth ground terminal Out position of a bi stable push control 1 Intended for connection to external LI protective conductor Frame or chassis terminal On supply
193. ough Primary chassis ground C803 5 V primary bias 5V 0 2V V805 3 8 SPCLR also called RESET Goes high for approximately 40 ms at power on then goes J800 2 low PCLR Held low for approximately 40 ms at power on then goes high J801 2 TxD Primary transmit to secondary serial data line Toggles J801 4 between 0 and 5V RxD Primary receive from secondary serial data line Toggles J801 3 between 0 and 5V Rx Primary receive from front panel serial data line Toggles 1800 4 between 0 and 5V BSTx Primary transmit to front panel serial data line Toggles J800 3 between 0 and 5 V 140 Diagrams Table 6 3 Test Points continued Al MAIN BOARD FIGURE 6 5 Sheets 1 4 Connect meter or scope common to test point when taking measurements at test points through 9 Secondary common Sheet 1 5V Secondary bias Sheet 1 5V 0 2 15V Secondary bias Sheet 1 15V 0 6V 24V Sheet 1 21V to 27V 1V p p ripple 15V Secondary bias Sheet 1 15V IV 25V Sheet 1 22V to 28V 300mV ripple Fan speed control Sheet 1 5 V with no load connected and an ambient temperature of U603 3 23 C Fan speed control Sheet 1 4 with no load connected and an ambient temperature of D606 anode 23 C SPCLR Sheet 2 Goes high for approximately 40 ms at power on and then
194. perating properly For models 664xA amp 665xA the verification tests will also check to see if the supply can be programmed from a GPIB controller If the supply fails any of the tests you are directed to the applicable troubleshooting procedure or flow chart Signature analysis SA is used to troubleshoot some of the supply s digital circuits Power On Self Test The power on self test sequence consists of tests of the front panel primary GPIB interface for 664xA amp 665xA Models only secondary interface circuits and the isolator board for 654xA amp 655xA models If the supply fails the self test the output will remain disabled turned off and the front panel display should indicate the type of failure The error will be displayed indefinitely and the supply will not accept GPIB or front panel commands Note that in order to perform troubleshooting procedures that require you to program the supply you will have to disable the self test You can do this by turning the supply off after it has failed the self test and by holding down the 7 key on the front panel for two seconds while turning the unit on This will cause the supply to skip the power on self test Table 3 2 lists the self test error messages that can appear on the display and gives the probable cause for each error Note For models 664 amp 665xA a partial self test is performed when the TST query is executed see Table 3 2 Those tests that interfere w
195. ransistor Array 65 6651A 65 6655A 1858 0077 IC Transistor Array 65 6652A 65 6654A 1858 0076 IC Transistor Array VR610 611 1902 0025 Diode Zener 10V 5 VR670 1902 0556 Diode Zener 20V 5 VR720 721 1902 0947 Diode Zener 3 6V 596 VR770 1902 0955 Diode Zener 7 5V 5 VR771 1902 0957 Diode Zener 9 1V 5 XF450 2110 0642 Fuseholder Y501 0410 4219 XTAL 11 590 MHz 0380 1128 Stdf female ref D400 404 690 CR700 0515 0885 Screw mach x 7 8m lg board to bus strip 0535 0031 Hex nut with lockwasher ref J451 0570 0647 Stud std ref J451 1200 0552 Socket IC 40 cont ref U504 HS400 690 1205 0587 Heat sink 65 6652A ref D400 404 690 65 6653A ref D402 690 65 6654A ref D402 CR700 D690 HS600 65 6651 1205 0280 Heat sink ref R657 65 6652A 65 6655A Not used 2190 0084 Washer lock ref HS400 690 2680 0232 Screw machine 10 32 0 312 inch lg PHL pan head ref D400 404 690 CR700 126 Replaceable Parts Table 5 7 Parts List For 500 Watt 1 Board for 655 amp 665 continued Desig 3050 0236 Washer FL MTLC ref D400 404 690 CR700 3050 0891 Washer FL MTLC ref J451 4330 0145 Insulator bead glass Y501 3050 0420 Washer FL MTLC ref HS400 690 0515 0909 Screw machine 4 x 0 712 mm lg pan head ref bus bars to PCB 2110 0689 Fuseholder ref F400 403 Ref Desig Agilent Part No Description C800 0160 5422 Capacitor 0 047uF 20 C801 0160 4822 Capacitor 1000 5 C802 0160 4822 Capacitor 1000
196. ration A2 GPIB Board Circuits For Agilent Models 664xA and 665xA Only The circuits on the A2 GPIB Board see Figure 4 6 provide the interface between the GPIB controller and the power supply All communication between the power supply and a GPIB controller is processed by the GPIB interface and the primary microprocessor circuits on the A2 board The primary microprocessor circuits microprocessor ROM and RAM chips decode and execute all instructions and control all data transfers between the GPIB controller and the secondary interface The primary microprocessor also processes measurement and status data received from the secondary interface A UART universal asynchronous receive transmit chip on the A2 board converts the primary microprocessor s 8 bit bus into a serial I O port The serial data is transferred between the primary interface and the secondary interface via a programmed GAL gated array logic chip and optical isolator chips These chips isolate the primary interface circuits referenced to earth ground from the secondary interface circuits referenced to power supply common The GAL chip also provides a serial I O port to the front panel thus allowing the power supply to be controlled from the front panel The serial link interface on the A2 GPIB board allows up to sixteen supplies to be connected together and to be programmed from one GPIB address The first supply is the only supply connected directly to the GPIB contro
197. rcuit produces a low level OVCMP signal With OVCMP low the GAL produces a high level OVSCR signal which is sent to the SCR control and to the output stage bias shutdown circuits The high level OVSCR signal causes the following actions to occur e The SCR fires shorting the supply s output e The GATED 15 V bias for the output regulators on the tunnel boards is shut down turning off the output e The GAL notifies the secondary microprocessor of the OV condition OVSCR is high on data line eleven in order to display a status update e The microprocessor clears the OVSCR signal when it generates the OVCLR signal output protection clear command is executed Principles of Operation 85 Output Power and Control Circuits Figure 4 4 Output Power The output power circuits are shown across the top of Figure 4 4 They consist of power rectifiers SCR crowbar filter capacitors a current monitoring resistor on the main board and regulator and downprogramming stages on the A4A1 A4A4 tunnel boards for the 500 watt models and on the main board for the 200 watt models For the 500 watt Agilent 655xA and 665xA models there are two top and bottom left tunnel circuits A4A1 and A4A3 and two top and bottom right tunnel circuits A4A2 and A4A4 The 200 watt Agilent 654xA and 664xA models use one left and one right tunnel circuit Table 4 3 summarizes these model differences Table 4 3 A1 Main Board and Heat Sink Assembly Model Di
198. rd for 655 amp 665xA continued Desig 65 6651A 0698 0084 Resistor 2 15K 1 65 6652A 0757 0283 Resistor 2K 1 125W 65 6653A 65 6654A 0757 0280 Resistor 1K 1 125W 65 6655A 0757 0279 Resistor 3 16K 1 65 6651 0698 3162 Resistor 46 4K 1 65 6652A 65 6655A 0757 0459 Resistor 56 2K 1 65 6653A 65 6654A 0698 3160 Resistor 31 6K 1 R682 0757 0401 Resistor 100 1 125W R683 0698 3160 Resistor 31 6K 1 R684 0757 0442 Resistor 10 1 125W R685 0757 0419 Resistor 681 1 125W R686 687 8159 0005 Resistor 0 Ohms R690 0698 0082 Resistor 464 1 125W R691 692 65 6651A 65 6652A 0757 0280 Resistor 1K 1 125W 65 6653A 0757 0274 Resistor 1 21K 1 125W 65 6654A 0698 3153 Resistor 3 83K 1 125W 65 6655A 0698 3156 Resistor 14 7K 1 125W R693 694 Not used R695 65 6651A 0811 1899 Resistor 25 5 10 W 65 6652A 0811 1903 Resistor 100 5 10 W 65 6653A 0811 0054 Resistor 300 5 10 W 65 6654A 0811 1586 Resistor 1K 5 10 W 65 6655A 0811 1873 Resistor 3K 5 10 W R696 697 0683 1065 Resistor 10 M 5 25W R700 701 0698 3162 Resistor 46 4K 1 R702 0698 3153 Resistor 3 83K 1 R703 65 6651A 0757 0443 Resistor 11K 1 65 6652A 0757 0452 Resistor 27 4K 1 65 6653A 0757 0457 Resistor 47 5K 1 65 6654A 0757 0463 Resistor 82 5K 1 65 6655A 0757 0470 Resistor 162K 1 0757 0465 Resistor 100 1 Resistor 215K 1 65 6651A 0698 3454 65 6652A 65 6654A 0698 8827 Resistor 1M 1 125W 65 6655A 0699 0070 Resistor 3 16M 1 0757 0419 Resistor 681 1 125W 0757 0401
199. ree e f 13 Functional circuit differences eei ee bud ouses He eet 83 G GPIB board Circuits BAS Shia abe 90 GPIB controller prinmiatyiddress u unakunaqa eee e i edge te e 90 secondary 90 _ V 90 GPIB values re d USING 13 Hazardous 7 8 dE M 9 174 IDN 8 41 Index to power supply assemblies 95 Interface GPIB communications eer tertie Sani AN 81 Interface signals eret tte terere ir p e b eR repe 81 Tsolatot Boat depth D 91 J Tumper block A3J3 u Rete OP HH tee e _ 90 L LCD displays front panel eder eere eren t eR eei b be edo e e te os 89 Loads electronic RE RARUS Bee B SES 11 M
200. ro to full scale output current range If the output current exceeds the programmed value the OUTPUT CONTROL goes low causing the output transistors to conduct less and thus decrease the output current Conversely if the output current is less than the programmed value the OUTPUT CONTROL signal goes high causing the output transistors to conduct more and increase the output current Note that the external signal IP can be used to program the output current in the CC mode A 0 to 5 V externally applied signal produces a proportional output current from zero to full scale IP is summed with the CCPROG and IMON signals When the power supply is programmed down in the CV or CC mode the CV CC control circuit causes the DP CONTROL signal to go low which in turn causes the downprogramming transistors to conduct current away from the load and speed up downprogramming The secondary bias supply generates the 5 V and 15 V bias voltages for the secondary interface circuits and for the CV CC control circuits The 15 V is also sent to the output stage bias shutdown circuit When power is initially applied a secondary power clear signal SPCLR is generated to initialize the secondary interface circuits The output stage bias shutdown circuit holds off the output until the secondary bias voltages have time to stabilize After a delay of 40 ms the 15 ISUP signal is generated and the GATED 15 V bias is enabled allowing the output regulator stages to be
201. s the output voltage that appears between S and S and not between the and output terminals Use coaxial cable or shielded two wire cable to avoid noise pickup on the test leads Voltage Programming and Readback Accuracy This test verifies that the voltage programming GPIB readback on 664xA and 665xA models and front panel display functions are within specifications Note that the values read back over the GPIB should be identical to those displayed on the front panel a Turn off the supply and connect a digital voltmeter between the S and the S terminals as shown in Figure 2 1 b Turn on the supply and program the supply to zero volts and the maximum programmable current see Table 2 3 with the load off c Record the output voltage readings on the digital voltmeter DVM and the front panel display The readings should be within the limits specified in the performance test record form for the appropriate model under CV PROGRAMMING 0 VOLTS Also note that the CV annunciator is on The output current reading should be approximately zero Program the output voltage to full scale see Table 2 3 e Record the output voltage readings on the DVM and the front panel display The readings should be within the limits specified in the performance test record form for the appropriate model under CV PROGRAMMING FULL SCALE Table 2 3 Voltage and Current Values Agilent Model Full Scale Max Prog
202. sociated status comparator U608 and drives the output low The low signal indicates an active status which is sent to the secondary microprocessor U504 through 0502 The front panel CV annunciator indicates when the CV mode is active CV is low The front panel CC annunciator indicates when the CC mode is active CC is low The UNREGULATED Unr annunciator comes on when neither the CV nor CC is active Post Repair Calibration Calibration is required annually and whenever certain components are replaced If components in any of the circuits listed below are replaced the supply must be re calibrated as described in Appendix A of the Operating Manual Al Main Board CV CC DACs operational amplifiers CV CC control circuit amplifiers readback DAC operational amplifier readback comparators or DAC reference circuits A3 Front Panel Board If the front panel board A3 or the EPROM chip A3UG is replaced the supply must be initialized first see EEPROM INITIALIZATION later in this chapter and then be recalibrated as described in Appendix A in the Operating Manual Inhibit Calibration Jumper If CAL DENIED appears on the display when the front panel calibration is attempted or if error code 1 occurs when GPIB calibration models 664xA amp 665xA is attempted the INHIBIT CAL jumper see Figure 3 3 has been installed This prevents power supply calibration from being changed You must remove this jumper from the INHIBIT CAL position Troub
203. t values This can be useful if you have trouble calibrating the unit or if you forget the calibration password See the POST REPAIR CALIBRATION discussion later in this chapter This is the normal operating storage position for the jumper Description With these pins jumpered the primary interface is placed in the SA mode Removing this jumper takes the primary interface out of the SA mode With these pins jumpered the supply s Digital Control DIG CNTL port is configured to be used with custom digital interface circuits With these pins jumpered the DIG CNTL port is configured to provide relay control outputs for relay accessories With these pins jumpered as shipped from the factory the DIG CNTL port is configured to provide a fault indicator FLT output and a remote inhibit RI input See Appendix D in the Operating Manual for more information 42 Troubleshooting SIGNATURE ANALYZER DISPLAY EDGE POLARITIES r LINE START STOP CLOCK LI SA MODE 7196 GROUND 18 Sk 710 08 STPRT STOP 0 000000000000 918 8 2 55 2 23 5 5 5 9 3 TOP 3 2 5 LOOKING DOWN 99 27 COMPONENT SIDE 292 a OF PC BOARD 500033 7 906000 3h 5 EE Pe 1254 ICI 2 99 lt 9 egg 9 99990990 Figure 3 4 Connections 2 GPIB Board Models 664 amp 665xA Only Sheet 1 of 3
204. ter d Set up voltmeter to read the average of the measurements as follows Press __ shift key shift key 0 Press until RMATH function is selected then press gt Press until MEAN function is selected then press Enter e Execute the program by pressing D Enter O Enter f Wait for 100 readings and then read the average measurement by pressing D Ger To repeat the measurement perform steps e and f CC Load Effect This test measures the change in output current for a change in the load from full scale output voltage to short circuit a Turn off the supply and connect the output as shown in Figure 2 1 with the DVM connected across the current monitoring resistor 16 Verification b Turn on the supply and program the current to the full scale current value and the output voltage to the maximum programmable voltage value see Table 2 3 c Adjust the load in the CV mode for full scale voltage as indicated on the front panel display Check that the CC annunciator is on If it is not adjust the load so that the output voltage drops slightly Record the output current reading DVM reading current monitor resistance value in ohms e Short the load switch and record the output current reading The difference in the current readings in steps d and e is the load effect and should not exceed the limit specified in the Performance Test Record Form for the appropriate model under CC LOAD EFFE
205. the display is inoperative Figures 3 6 and 3 7 isolate the problem for OV circuit trouble symptoms Figures 3 8 and 3 9 provide troubleshooting for output held low and output held high trouble symptoms respectively Figure 3 10 troubleshoots the DAC circuits Waveforms which will aid you in troubleshooting the CV and CC DAC circuits are provided in Figure 3 11 Figure 3 12 isolates faults to either the DAC or the amplifier component in CV and CC DAC amplifier circuits Figures 3 13 and 3 14 provide troubleshooting procedures for the GPIB board 664xA amp 665xA the isolator board 654xA amp 655xA and the main board respectively when serial data line or secondary interface error messages appear on the display Figure 3 15 is for the down programming circuit and Figure 3 16 is the Isolator Board circuits troubleshooting chart Bias and Reference Supplies Many of the troubleshooting flow charts start by checking the bias and or reference voltages to make sure that they are not causing the problem Table 6 3 in Chapter 6 lists the bias and the reference voltage test points for the A2 GPIB board A2 Isolator Board and the Al Board CV CC Status Annunciators Troubleshooting When troubleshooting the CV CC status annunciators or the status readback circuits first measure the voltage drop across the gating diodes D651 CC and D615 CV A conducting diode indicates an active ON control circuit This forward drop is applied to the input of the as
206. tor across the output and a DVM across the resistor See Current Monitoring Resistor Turn on the supply and program the output voltage to 5 V and the current to zero Divide the voltage drop DVM reading across the current monitoring resistor by its resistance to convert to amps and record this value Iout Also record the current reading on the front panel display The readings should be within the limits specified in the Performance Test Record Form for the appropriate model under CC PRGRAMMING 0 AMPS Program the output voltage to 5 V and the current to full scale see Table 2 3 Verification 15 e Divide the voltage drop DVM reading across the current monitoring resistor its resistance to convert to amps and record this value Iout Also record the current reading that appears on the front panel display The readings should be within the limits specified in the performance test record form for the appropriate model under CC PROGRAMMING FULL SCALE Current Sink CC Operation This test verifies current sink operation and readback a Turn off the supply and connect the output as shown in Figure 2 1 except connect a DC power supply in place of the electronic load as indicated b Setthe external power supply to 5 V and its current limit to 20 of the full scale current value see Table 2 3 of the supply under test For example if the full scale current value is 25 A set the external supply s current limit to 5 A c
207. turned on During operation the output stage bias shutdown circuit will turn off the GATED 15 V bias voltages and will shut down the output if any of the following occur The output is programmed off An over voltage condition is detected OVSCR signal is received The line voltage falls below 90 volts approximately The INHIBIT signal is received A secondary bias supply failure occurs The SCR control circuit is enabled when the 15 ISUP signal is received When an over voltage condition occurs OVSCR signal is generated as described previously the SCR control circuit generates the OV signal which in turn fires the SCR thus shorting the output of the supply The fan speed control circuit included in the functional circuit block with the secondary bias supply provides the DC voltage to operate the cooling fan The FAN PWM pulse width modulated signal from the secondary microprocessor varies this voltage according to the ambient temperature and the output current of the supply 88 Principles of Operation Front Panel Board Circuits Figure 4 5 The supply s front panel assembly contains a circuit board a keypad a liquid crystal display LCD and rotary controls and A3G2 for the output voltage and current The on off switch not shown in Figure 4 5 is also located on the front panel The same front panel board is used in all Agilent models The front panel board A3 contains microprocessor circuits mi
208. upply must be initialized before it is re calibrated See EEPROM Initialization later in this chapter Chapter 5 in this manual lists all of the replaceable parts for the different Agilent series of power supplies Chapter 6 contains schematics test point measurements and component location diagrams to aid you in troubleshooting the supply Test Equipment Required Table 3 1 lists the test equipment required to troubleshoot the power supply Recommended models are listed Troubleshooting 31 2 ISOLATOR A4A1 A4 GPIB BOARD BOARD BOTTOM LEFT TOP LEFT HEAT SINK NOTE 1 SEE NOTE J TUNNEL CIRCUITS TUNNEL CIRCUITS ASSY 7 A4A2 RIGHT TUNNEL CIRCUIT A4A4 7 BOTTOM RIGHT TUNNEL CIRCUIT A4RT 301 THERMICTOR FRONT PANEL DSP1 A3FRONT n ASSY DISPLAY PANEL PCB KEYPAD XFMR TOP VIEW COVER REMOVED NOTES 1 GPIB 8OARD USED WITH 664XA AND 665XA MODELS 2 SOLATOR BOARD USED WITH 655XA AND 654XA MODELS Figure 3 1 Top View with Cover Removed for 655xA amp 665xA Models Sheet 1 of 2 32 Troubleshooting A2 ISOLATOR GPIB 80ARD BOARD SEE NOTE 1 SEE NOTE 2 At BOARD FRONT PANEL DSP1 ASSY DISPLAY TUNNEL CIRCUITS A4 HEAT SINK ASSY TUNNEL CIRCUITS A4RT 301 THERMISTOR FRONT PANEL PCB KEYPAD PWR TOP VIEW COVER REMOVED NOTES 1 GPIB BOARD USED HERE WITH 664XA 665xA MODELS 2 I
209. urrent val es tei Ue Ue e e EE ere Ui o teen ue 13 Voltage programming and readback 13 W 11 Waveform transient Tesponse 15 178 Index Manual Updates The following updates have been made to this manual since its publication date 8 28 08 The performance test records on pages 20 29 have been updated to remove the measurement uncertainties and correct minor discrepancies in the test limits
210. ussion The simplified block diagrams in this section show the major signals between circuits The simplified block diagrams also show the reference designations of the components that comprise a functional circuit These same reference designators are shown in the schematic diagrams in Section 6 Secondary Interface Circuits Figure 4 3 The secondary interface circuits are also located on the Al main board These circuits include a secondary microprocessor programmed GAL three DAC Op amp circuits and analog comparator circuits The secondary microprocessor translates the serial data received from the A2 board into a parallel 12 bit data bus The data bus is connected directly to three DAC Op amplifier circuits Under control of the microprocessor the selected DAC converts the data on the bus into an analog signal The DAC reference circuit provides 10 V Ref for the CV and CC DACs and a 11 5 Ref for the readback DAC Principles of Operation 83 POWER SUPPLY SERALUNK DIG CNTL A2 GPIB BOARD 1 BOARD GPIB INTERFACE A2 ato FOR MODELS BOARD 5 664 66514 ONLY OUTPUT POWER ANO CONTROL SECONDARY INTERFACE 1 HEAT SINK ORCUTS 1 ASSY ON 41 FRONT PANEL ASSY HEAT SINK ASSY NT PANEL BOARD FOR 500 WATT UNITS IT EXTERNAL 1 MAIN CONTROL Figure 4 2 Overall Block Diagram The CV DAC Op amplifier converts the
211. voltage and should not exceed the value listed in the Performance Test Record Form for the appropriate model under CV LOAD EFFECT CV Source Effect This test measures the change in output voltage that results from a change in AC line voltage from the minimum to maximum value within the line voltage specifications a Turn off the supply and connect the AC power line through a variable voltage transformer b Connect the output as shown in Figure 2 1 with the DVM connected between the S and the S terminals Set the transformer to nominal line voltage c Turnon the supply and program the current to the maximum programmable value and the output voltage to the full scale value see Table 2 3 d Adjust the load for the full scale current value see Table 2 3 as indicated on the front panel display The CV annunciator on the front panel must be on If it is not adjust the load so that the output current drops slightly e Adjust the transformer to 1396 below the nominal line voltage e g 104 4 Vac for a 120 Vac nominal line voltage input f Record the output voltage reading on the DVM g Adjust the transformer to 6 above the nominal line voltage e g 127 2 for 120 Vac nominal line voltage input h Record the output voltage reading on the DVM The difference between the DVM reading in steps f and h is the source effect voltage and should not exceed the value listed in the Performance Test Record Form for the appropriate m
212. where the CVPROG signal line goes 4 Unterminated signal lines go to at least one other location on the same sheet Example PRX 3A where 3A indicates the coordinates on this schematic sheet where the PRX signal line goes 5 Unless otherwise noted bias connections to integrated circuit packages are as follows Common 5 14 pin packages pin7 pin 14 16 pin packages pin 8 pin 16 20 pin packages pin 10 pin 20 Diagrams 139 Table 6 3 Test Points POINT NUMBER SIGNAL MEASUREMENT AND CONDITIONS A2 GPIB BOARD FIGURE 6 3 Connect meter or scope common to test point when taking measurements at test points through 9 Primary chassis ground J106 4 5 V primary bias 5V 0 2 VI01 1 8 PCLR Goes high for approximately 40 ms at power on then goes U101 6 low PCLR Held low for approximately 40 ms at power on then goes high U101 8 amp STX Primary transmit to secondary serial data line Toggles U110 3 between 0 and 5V SRX Primary receive from secondary serial data line Toggles 0111 6 between 0 and 5V FPRX Primary receive from front panel serial data line Toggles 0119 4 between 0 and 5V FPTX Primary transmit to front panel serial data line Toggles 0119 18 between 0 and 5 2 ISOLATOR BOARD FIGURE 6 8 Connect meter or scope common to test point when taking measurements at test points thr

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