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66332A,6632B-6634B Service Manual

Contents

1. E E 2p 208 202 DN 1 d 8151 8281 SAIG2A220JAAH R429 D Rae ES Ls T Ss VOLTAGE GAIN STAGE rs E 5 GE OUTPUT STAGE 0698 1972 0698 8827 8698 2454 2 25 5653401180 wa 5 431 d we 1 60316 2 1826 8543 950 245 E 71 oot nm Vist 22 9160 4818 ere Ed 2570152 2 KE wo 013 9698 3444 8151 8487 0151 0418 62328 MT 8158 6809 5 4 3 148509 Wa rz cii cop R339 15Vs NORM E 2 4392 21000 1098p 0757 0442 458 199K 1 0306 0160 4831 6168 0153 2 1 mce R399 PA 3 2 r C423 C385 0333 8 041 33 4 SGA3EDSW IF 1 Aessen 0160 4807 8168 4835 9698 6368 0698 6533 PEAR 3 he e 58336 5023RE4K7508 1 MSS 435006 1853 8335 552 1981 0833 26416 1174 1854 1174 1854 1174 os une 5739635 1 0317 11 356 Past her 1982 0957 2 0160 6827 9169 5471 0160 6827 22NF 107480V 8159 0905 ze 1981 1128 dd D NORM 8751 6401 VT 036 x 8390 0 9151 9442 9149 8115 1901 0719 un m 2159 0005 8159 9005 8158 0005 98583 P NO LOAD LOAD C314 5390 8 lt a 0319 R359 8 841u 08159 8005 NO LOAD Tes 006 NO LOAD 8 8169 5422 0160 5800 on REZA D 1901 1098 8159 0005 53 zl 15829187 5
2. manual revisions 10 notice 5 OUT 47 out of range 41 OV_Detect 48 52 OV_Prog 50 OV SCR 48 52 p PARD 15 19 password 41 performance test form 19 performance tests 13 PM Inhibit 52 power on self test 37 primary interface 48 printing 5 programming 13 protection 40 R readback accuracy 14 reference voltages 38 39 replaceable parts binding posts 57 replaceable parts chassis 55 revisions 10 RmHi 52 RmLo 52 ROM upgrade 42 RPG 48 82 RS 232 47 4 safety considerations 9 safety summary 3 schematic 1 77 78 79 A4 76 schematic notes 71 SCR 52 secondary interface 48 self test 37 sense 47 sense switch 52 serial number 5 series regulator 50 shunt clamp 52 status annunciators 38 T Temp Amb 50 test equipment 11 test setup 12 trademarks 5 transformer removal 45 transient recovery 16 troubleshooting bias and reference supplies 38 39 troubleshooting equipment 24 troubleshooting flowcharts 24 troubleshooting introduction 23 troubleshooting overall 24 troubleshooting status annunciators 38 U UNR 38 NM verification tests 13 VMon 50 52 voltage programming 14 W warranty 2 Manual Updates The following updates have been made to this manual since the original print date 4 25 03 Information about serial numbers and manual revisions has been updated
3. 1858 0954 1 am gt 1858 0054 R362 1 2 Em R322 2 he 0160 5098 8698 3156 2326 C440C224KSRSCA case 8157 0238 E 108 9688 6292 6063858807 1 2 1 RE PED 52 D 8160 4801 7 0751 0447 340K 9757 0436 5053H039KGGF 9160 4835 De 9847 8530024326 V aV 415 sic 8698 6392 106 8 d 0309 0311 0315 0319 9751 0442 5 Pes 0315 5 KE g 0 m tk u MEG y BK 1T 1 42 1 2 190 a ue 28 16 d i 5 15 1901 0950 0757 0442 1 O 0157 0438 4 1826 0348 wa m FAN HEATSINK oes 190270957 2 68435050 11 VIEW 8168 5422 ai pts e El 1826 1878 gor ene SA205C473MAAH LO 0757 0442 1 8 Wa 8 cam Svs sl eae 8 8 0308 0310 0312 0317 0169 5422 U318 A wy SA2GSCAT3HAAH y 208 5 0699 2245 0699 1518 10 9 P di 482 1826 6346 5625 08 7 44 50332 1981 8958 Lea 2 Vasz M 1826 1878 BAVIB SELECTED E cua 8 8470 8 8276 4 6168 5522 1826 1878 1 2 SAZOSCATIMAAH i n A 1826 2252 9169 5422 Ee min SAZOSCATINAAH 0757 8458 5043E051KIF E le II z ss 8 305 8 ze pud m 1 2 1826 0346 9698 6628 1825 1878 ec nemen sk 1 2 0698 6320 Diere Figure 6 3 1 Board schematic sheet 3 4630 CONNECTOR 252
4. Raat E E M SS xo rim m HE 8160 5422 4 2 5 cass ele 458 Su 43 Vass 8168 4815 5053404327 SAIQSCIG4KAAH A P R353 E 619K 619K 2 gt 1 2 2 1 2 gt 1 ER mr 0698 8959 9698 8959 9751 9442 053406 19KOF m UNE a DS u 1901 8033 2 im zeien ei 9698 3444 0324 iw 1826 1378 gt d 1902897 ven a 9658 S _ Ws can 8 Eo 8 E OVERVOLTAGE DETECTION AND CONTROL R360 R357 8 8 25K 22 225 ea ete gt 0310 8 9593 22465 0699 1510 paa 16 56336 1826 1878 1991 8058 ATTEN BAVIA SELECTED 1926 2252 Vase d l TURN ON CONTROL 51 1K 9751 8458 d 0160 6827 22NF 107400V 5043ED51K1F E KE El ics Ki 9160 5422 E s V 8169 5422 AS We me 25 1K SAZOSCATIMAAH 1 2 NEGATIVE CURRENT CONTROL CKT gx E 4 EE 1826 1370 zm 097 0280 E pe 619K Sk 0751 0412 0336 0339 ri pooo 8757 0280 SE m Es SER Nx 0305 0 HN 9160 4812 SAIGIAZ21JAAH coss 8 LOAD a P ses R368 NO LOAD 2358 EA 4 6160 4835 3 Ba QE 1 5130543324 4 ik t pe sam Fo edu 8757 8288 8757 0442 1858 8954 eg 0160 4441 1858 8854 SOS3HDB2SKOF 4 4
5. PM Inhibit R335 Yes Low IMon H U309A 6 0V Yes y Troubleshoot Turn On Control Circuit Q305B bd C D and U305A Check High Range Current Monitor Amp U309A Check 7 2 Interface Board Figure 3 1 Sheet 7 No Output Voltage Troubleshooting 3 Yes Check for short across output such as output cap C382 CR342 etc No Check W7 2 Interface Board Yes Check Positive Current Control Circuit U310B 31 3 Troubleshooting 0302 base 5V Yes Q303 base gt 1 2V gt 1V across R323 Yes Q307 collector to emitter 4V Yes Continued from sheet 7 Check C331 C333 C339 and Q306 circuits Figure 3 1 Sheet 8 No Output Voltage continued 32 No Check C330 R333 R346 and Q302 Check and Output Stage Check 0301 0305 circuits 0302 07 R324 and R326 Troubleshooting 3 Continued from sheet 7 CV_Prog R401 4 7 Check W7 2 Interface Board Check Voltage Monitor Amplifier U315B circuit Check Voltage Control Circuit U315A Figure 3 1 Sheet 9 No Output Voltage continued 33 3 Troubleshooting 34 Continued from sheet 2 CC_Prog R360
6. SAZOSCATIMAMH R382 1 2 PROG 81 55 0686 2725 9160 5422 108 i 9693 9642 Ces R489 DH 74 562 16 15 1 1M J 8 0757 0481 112 d wu 1 1 2 1 As 6354 E 3301 22 0695 8730 0699 8730 8699 0134 1 8 Ee r d 9698 3922 6698 3922 2 AA 9169 5422 2 Enna preis DER SAZOSCATINAAH R396 AST 2K oe siete 6 2 3 2 5K 8595 1865 2 1425 16 gl L 2 E 3698 8093 0698 6631 4 2390 0160 4787 d uns e rm E s E 8 ieee i s 0160 4881 E d es Li Pm ase R380 292 00188 1088 m e 8168 5422 108 5 1 1 4287 17 1 1 2 1826 1878 8698 8893 8698 6631 Vii ai al ADTIQUN E V Lem HIGH RANGE CURRENT MONITOR cs 6160 4189 p 5420504124 be 0166 5422 TED 0160 4997 R385 R311 n am 25k Lond 6370 gt 4301 12 1 1 2 8699 0236 8699 8934 ma R N G C S E L E 5 307 11 50237425008 35 650 8168 5422 1 2 9698 4444 E Ka EN 2 CLAMP P Bn OS TRIM NEG cas x ra RANGE SELECT 25k 8168 4791 6 34814 2 3 1826 1524 8699 0236 1826 1135 5 237 2 5808 l 0 27 2 8 QV DETECTe sazoscaranan gt ve 8168 5422 et 699 0934 Sa 0757 0199 Garde 35 65 0160 4807 Ven Se SA102A108 AAH d sz i 2 FS ov_PROG zx CL
7. 148998 In H0313 s d i 1901 0987 4 No LOAD 4 2008 208 2001 1 2 1981 8987 1981 8719 4328 2 A e Ce R501 esis d x 1 2 R474 5 11 148998 1884 0310 a 3008 208 2001 a 5 8160 5422 8159 0005 4328 3 E LOAD REC Se 148988 capt ETT 0337 pr 8160 8231 4 3808 288 281 314 3 4180 E usen gt Gen ee a 4320 4 1252 0856 0168 8153 age m en m 148908 Rel ey 25 60 4040 0314 ASSY 06612 60005 emer 0659 3604 e SES S 50 i ea sie ad S E da FP 69 57 68 3 5 0425 383 148998 PCB TETE ron 0318 d hi ES E Wen n 6 22 M 2 80 00 FRA SCH 208 AA gt 8168 8186 8160 5459 9160 5841 4328 8 gt e 22 stern t8 xFr ou E 2 1 ane Zen 169 5422 on 2 U308 C A CLAMP_N 0160 6806 148998 1252 0856 4 ERT S300 A 3808 288 2901 26 60 4040 st 8168 5847 9757 0407 8 8159 0095 35 NORMAL 2 8 1 1 2 2463 Ratt DNA 148908 061 TU 3 ES E FAST 4 2008 208 2001 1252 0056 asi Vasz Visa Vase Vaso Vas eee 155 8851 voles wa er 8159 0685 3101 2927 3328 8 i i 1 25 d pa 148588 1825 1534 NO LOAD 4 NO LOAD Td na 0352 0807 2 Rage wel 7309 3506661 3320 9 Le 1901 8987 1981 8987 0336 8757 0395
8. The following paragraphs provide test procedures for verifying the supply s compliance with the specifications listed in Table 1 of the Operating Manual All of the performance test specifications are entered in the appropriate Performance Test Record Card for your specific model You can record the actual measured values in the column provided in this card Programming You can program the supply from the front panel keyboard or from a GPIB controller when performing the tests The test procedures are written assuming that you know how to program the supply either remotely from a GPIB controller or locally using the control keys and indicators on the supply s front panel Complete instructions on remote and local programming are given in the User s Guide and in the Programming Guide Programming ratings are as follows 13 2 Verification and Performance Tests Table 2 2 Programming Ratings Voltage Rating Full Scale Rating Full Scale Rating Agilent 20V 20 020 V 5A 5 0045 A 66332A 6632B 50 V 50 045 V 2A 2 002 A Agilent 6633B 100 V 100 1 V lA 1 001 A Agilent 6634B 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 regulates the output voltage that appears between 5 and 5 and not between the and ou
9. 47 i Wwe 1 A X40 F wr AO i Zeie 91607 i 29197 MO Ee eebe EI uem Aquiecey UIN Lv oL E WOH 1 1 t 1 1 1 49 Figure 4 1 2 Block Diagram 4 Principles of Operation The EEPROM electrically erasable programmable read only memory chip on the A2 interface 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 Access to the calibration data in the EEPROM is controlled by the combination of a password and switch settings on A2S201 located on A2 interface board See Chapter 3 Inhibit Calibration Switch The Dual 12 bit DAC converts the programmed value of voltage and current on the bus into the CV_Prog and signals which are sent to the CV control circuits in order to control the magnitude of the output voltage in the CV mode and output current in CC mode The CV_Prog and CC_Prog signals are in the 0 to 5 V range which corresponds to the zero to full scale output ratings of the dc power supply The Quad 8 bit DAC converts programmed information for the following circuits into analog format negative offset trim OS Trim Neg
10. 18000 uF 33 000 uF 0 047 uF 2200 pF 0 033 uF 3300 pF 0 047 uF 10 pF 10 pF 10 pF 33 pF 180 pF 0 047 uF 0 047 uF 0 047 uF 100 uF uF 10 pF Table 6 1 Model dependent Components 6633B 2200 uF 18000 uF 3300 pF 0 022 uF 0 033 uF 22 pF 15 pF 220 pF 0 022 uF 50 uF 6634B 1200 uF 8200 uF 0 047 pF 0 01 uF 0 022 uF 0 033 uF 22 pF 10 pF 120 pF 0 047 uF 6800 pF 22 uF Designator 420 421 422 424 425 423 425 426 427 428 430 431 432 C482 C499 D319 320 321 D330 D400 D499 F400 406 L300 301 Q312 319 R300 R301 302 R313 66332 6632B 6 8 uF Diode Diode 0 Ohm 22 uH Transistor 3K 121 Ohm 4 7 Ohm 6633B 2 2 uF 0 022 uF 1000 pF 0 047 uF 1000 pF 0 047 uF 0 22 uF 0 022 uF Diode Diode Diode 12K 511 Ohm 10 Ohm 6634B 2 2 uF 0 022 uF 220 pF 0 0047 uF 1000 pF 0 1 uF 4700 pF 0 047 uF 0 022 uF Diode Diode 71 6 Diagrams Table 6 1 Model dependent Components continued Designator 66332A 6633B 6634B Designator 66332 6633B 6634B 6632B 6632B R319 316 Ohm 511 Ohm 750 Ohm R413 10K R320 1 5K 2 61k 1k R415 22K 22 22K 22 22K R321 80 6K 215k 340k R418 51 1 80K 160K R323 5 11K 14 7K R421 3 3 Ohm 7 5 Ohm R324 5 11K 5 11K R422 133K R325 14 7K 5 11K R423 429 10K 10K 15K R326 5 62K 26 1K 26 1K R425 402K R328 20K 10 Ohm 10 Ohm R427 10K 0 Ohm 0 Ohm R329 4 7
11. we ues 1191 SH HAUT ueg _ 199190 ADA AO ues UOUA 1 9254 0218 D a jonuoy 198180 Y AST 07 SE A 007 z uou 2422 bl fen uu 50 jouo5 Den 106 65 22 232 m ovi 3unus prugul cose 28189 22 90016 ule Seed 1254 IH 041002 Sod 2 5 2 ley AO amp xpalep Ao T es H SEAN 19018 AO N A A 01 mi eu jndino d HE IL CLC PLES ul 90916 1ndino E sdure 5 1unus coEO dino 4 2 0053 led Figure 4 2 1 Block Diagram 51 4 Principles of Operation Two current shunt resistors monitor the output current RmHi R473 monitors the high current
12. 0772 1 Transistor PNP Q311 66332 6632 1853 0656 1 Transistor PNP Q311 6633B 6634B 1853 0772 1 Transistor PNP Q312 66332A 6632B 1854 1174 1 Transistor NPN Q313 All 06612 60006 1 FET Assembly All 1855 0831 1 ref Q313 MOSFET N Chan All 1205 0350 1 ref Q313 Heat Sink Q314 All 06612 60005 1 FET Diode Assembly All 0590 0199 1 ref Q314 Hex Nut w Lockwasher All 1855 0726 1 ref Q314 MOSFET P Chan All 1205 0350 1 ref Q314 Heat Sink All 0340 0950 1 ref Q314 Insulator All 2200 0143 1 ref 0314 Mach Screw 4 40 All 1901 0987 1 ref 0314 Diode D499 62 Designator Q315 Q315 Q316 Q317 Q317 Q318 Q319 R300 R300 R301 R301 R301 R302 R302 R302 R303 R304 R305 R306 R307 309 R310 R311 R312 R313 R313 R314 R315 R316 R317 318 R319 R319 R319 R320 R320 R320 R321 R321 R321 R322 R323 R323 R323 R324 R324 R325 R325 R325 Model 66332A 6632B 6633B 6634B All 66332A 6632B 6633B 6634B All 66332A 6632B 66332A 6632B 6633B 6634B 66332A 6632B 6633B 6634B 66332A 6632B 6633B 6634B All All All All All All All All 66332A 6632B 6633B 6634B All All All All 66332A 6632B 6633B 6634B 66332A 6632B 6633B 6634B 66332A 6632B 6633B 6634B All 66332A 6632B 6633B 6634B 66332A 6632B 6633B 6634B 66332A 6632B 6633B 6634B Part Number 1854 1174 1854 1362 1855 1016 1853 0656 1853 0772 1858 0074 1853 0656 0698 3642 0764 0046 0757 0403 0757 0416 0757 0283 0757 0403 0757 0416 07
13. 1 Res 1K 1 0 125W R346 All 0757 0442 1 Res 10K 1 0 125W R347 All 0757 0458 1 Res 51 1K 1 R348 66332A 6632B 0698 3444 1 Res 316 Ohm 1 0 125W R348 6633B 0698 4187 1 Res 632 1 R348 6634B 0757 0427 1 Res 1 5K 1 R349 66332A 6632B 0698 3159 1 Res 26 1K 1 R349 6633B 0698 4509 1 Res 80 6K 1 R349 6634B 0757 0468 1 Res 130K 1 R350 66332A 6632B 0757 0279 1 Res 3 16K 1 R350 6633B 0757 0435 1 Res 3 92K 1 R350 6634B 0757 0279 1 Res 3 16K 1 64 Designator R351 R351 R351 R352 R353 R354 R354 R354 R355 R356 R356 R356 R357 R357 R358 R359 R360 361 R362 R362 R363 R364 R364 R365 366 R367 R370 R371 R371 R372 R372 R373 R374 R375 R376 R376 R377 R377 R378 R378 R379 R380 R381 R382 R383 R384 R384 R385 R385 Model 66332A 6632B 6633B 6634B 66332A 6632B All 66332A 6632B 6633B 6634B All 66332A 6632B 6633B 6634B 66332A 6632B 6633B 6634B All 66332A 6632B All 66332A 6632B 6633B 6634B All 66332A 6632B 6633B 6634B All All All 66332A 6632B 6633B 6634B 66332A 6632B 6633B 6634B 66332A 6632B All All 66332A 6632B 6633B 6634B 66332A 6632B 6633B 6634B 66332A 6632B 6633B 6634B All All All All All 66332A 6632B 6633B 66332A 6632B 6633B 6634B Part Number 0698 6320 0698 5087 0698 6320 8159 0005 0698 8959 0757 0447 0757 0458 0698 4509 0698 0084 0757 0472 0757 0270 0757 0472 0699 2246 0699 1510 8159 0005 0699 2246 0698 8807 0699 1513 0757 0473 0699 2246 069
14. 4 8V Yes Check A2 Interface Nod 9 473 Yes Check Positive Current Control Circuit Check High Range Current Monitor Amplifier Figure 3 1 Sheet 10 No Current Limit Program the output voltage and current to the full scale value and the OV to 1 2 OV prog 2V A2 Interface Board or cable W7 defective Check R350 C335 U306B No Check R349 R351 R356 C336 0306 U306B 2 OV Low 306 See note Troubleshooting 3 OV_SCR pulse R438 low 5us Check Q318B R441 A2 Interface Board Reset the OV Shift Prot Clr and observe the OV SCR signal Each time OV is reset the unit will generate another OV signal The OV pulse OV is approximately 5us long Q318D Collector pulses high 5us PEN Check Q318A D and associated circuits Yes Y Check A1CR342 Figure 3 1 Sheet 11 Unit Does Not OV 35 3 Troubleshooting Disable the OV capability by shorting R351 After the protection is disabled program the output voltage to zero current to full scale and Output ON If the unit is in Protect mode Press Protect Clear The out
15. 488 Provides the interface to an external GPIB controller Can be 100 Vac 120 Vac 220 Vac or 240 Vac Input 47 4 Principles of Operation A3 Front Panel Circuits As shown in Figure 4 1 the supply s front panel assembly contains a circuit board a keypad a liquid crystal display LCD and a rotary control RPG for the output voltage and current With the exception of the RPG A3G1 the Front Panel board is assembly level replaceable part A separate front panel binding post board 1 also included on the unit It is also available as an assembly level replaceable part The A3 front panel board contains microprocessor circuits which decode and execute all keypad and RPG commands that are transferred to the power supply output via the serial I O port to the primary interface circuits on the A2 interface 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 A2 Interface Circuits The circuits on the A2 interface board provide the interface between the GPIB interface RS 232 interface and front panel interface and the dc power supply 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 A2 Interface board is assembly level replaceable it contains no user replaceable parts With the exception of the front panel m
16. 6180 4123 8 7322818593543 process 5 we 6168 5522 8 em ag 0698 3279 21201 SAZOSCATINAAH ert xer 13228195 93545 m dts DER 3414 1 EN Ey 1826 1533 wa 1252 0863 ez E jee ie Yo 22 21 2831 86301 J E 0383 Vass V Y 1901 1098 ye 4150 44 2 2 S os 4 1252 0863 1981 0731 emn 8 22 oie nt C328 PRIMARY AC LINE CONFIGURATION cercos SP Er reg 8 9180 4136 a 8188 2588 5 8 MCTSISCT 1901 1038 tei 1902 8957 4414 3 VXIHIO NHA 14158 FROM SIDE OPENING OF UNIT 058 see 3 1826 9214 em E di 730035 1 1252 0963 22 21 2031 o 22 21 2091 1252 0963 1 2 1 2 190 120 4385 3 E 6 gt SSC 3 007 ZC 2110 0712 starnjs xfr QS 605 62100044 SGZ0CKGROODSB2AAZ T INTERFACE 5V INTERFACE BIAS SUPPLY 5 gt SECONDARY 0 E3868 0698 0082 8352 9801 SO33RC2K 400F 350566 1 22 21 2031 0306 1252 0863 sternj5 xfr get iy mt 3 RED KR 1901 9131 2 8362 9807 62164 350566 1 DE 1825 1597 220 240 0306 LM2949CT 5 8 E 8352 9801 350566 1 E anm ZE LINE 1252 8863 C326 H 1 om SHITCH SWITCH 1303 2 8 0414 dE n 0160 5122 0314 aj o 592 184739959 a 9180 3965 8 841u 142 See 9169 5422 5 2 4 3 5 1901
17. 7987 J638 1252 7527 os 1252 7287 J638 1252 7987 vee ken zer 636 252 7987 J638 252 7987 J638 252 7987 J638 LII IJ 1 881 CONNECTOR R63 1 252 7987 2638 5 Connecter to Interface peb 78 0698 3439 471 REMOTE OUTPUT SENSE NORMAL NORMAL DUAL PATTERN OUT_A kegu Bei 5 OUT A CE S Regu 1 2 8438 1678 DES Er 471 OUT LP 33ohm 5 Sw 2110 0757 0 0622 SENSE SENSE_A SENSE A 13 Be 2w 8685 178 1 16 CU 0698 3439 1 5 471 33ohm 5X Sw 2110 0757 062a OUTPUT REVERSE DUAL PATTERN R6D6 158 049071678 0757 0284 871 REMOTE SENSE REVERSE 1627 178 1 16 1A de 0698 3439 L ups 471 4610 RLY_OPT 8 148851 REL_SEN_REM_N J610 148851 REL_OUT_NORM 618 148851 RLY SEN LOC lt J618 148851 RLY_OUT_REV 148851 618 148851 RLY_SEN_REM_R J610 148851 1 148851 Figure 6 4 Relay Option Board schematic Index OUT 47 sense 47 A Al board removal 45 1 Main board 50 A2 boa
18. 8121 6 100844 34072 NO LOAD 1826 1593 E 304 0313 waer Paoa enm as 3 al 3303 3 42 CH SL 8 8 SCREW HOLE 2110 0699 ter xfr 925108571 RE SPARE Figure 6 3 A1 Board schematic sheet 1 R451 2 SENSE SER EN woe FUSE HOLDER 1884 0310 2110 1107 50200X8RO08SE2AAZ pm 0313A ASSYH 06612 60006 CR342 OUTPUT FILTER d 9187 1205 8358 wh x ge POVER MESH OUT u OUT P 2 2110 8171 2118 0711 7115 8857 8368 2338 K SHUNT CLAMP d 5002 3405 SG2OCXORBGOSB2AAZ OUT 728505580088 0699 1797 Pm CAN d 1 R466 G TOMEG Rasa 6 nar Jee e NO LOAD 2 208 R394 7115 8057 7115 8857 TMP NO 148903 4 S02OCXERODESEZAAZ 7 SOzOCKORBOCSB2AMT 1285 1161 24914 9596 0258 Les 12Vs 1826 1534 M 0338 E
19. C334 C334 C335 C335 C335 C336 C337 339 C340 C341 343 C344 C344 C345 C346 C346 C347 C348 58 Table 5 3 A1 Control Board PC Board Assembly Model 66332A 6632B 6633B 6634B 66332A 6632B All 66332A 6632B 6633B 6634B 66332A 6632B All All 66332A 6632B All All All 66332A 6632B 6633B 6634B 66332A 6632B 66332A 6632B All All All All All All All All All All 66332A 6632B 66332A 6632B 66332A 6632B 6633B 6634B 66332A 6632B 6633B 6634B All All 6634B All 66332A 6632B 6633B 6634B All 66332A 6632B 6633B 6634B All All Part Number 5063 3431 06633 61023 06634 61023 0160 5422 0160 5422 0180 4756 0180 4815 0180 4816 0160 5422 0180 2980 0180 4033 0160 5422 0160 5422 0180 4818 0160 5422 0180 4819 0180 4817 0180 4818 0160 5422 0160 5422 0160 5422 0180 4129 0180 4136 0180 4129 0160 5422 0160 4831 0180 4129 0160 5422 0160 5098 0160 4832 0160 4830 0160 5644 0160 5422 0160 4835 0160 7001 0160 5410 0160 4834 0160 4812 0160 5422 0160 6836 0160 5422 0160 5422 0160 4833 0160 5422 0160 4833 0160 6827 0160 5422 Qty 1 1 1 1 1 1 1 1 1 1 1 1 2 1 2 1 1 1 1 2 1 2 1 1 1 1 1 3 1 1 2 1 1 1 1 1 1 1 3 1 3 1 1 aa bech Description Control PCA Tested Control PCA Tested Control PCA Tested Cap 0 047 uF 20 Cap 0 047 uF 20 Cap 18 000 uF 50V Cap 2200 uF 160V Cap 1200 uF 250V Cap 0 047 uF 20 Cap 1000 uF 50
20. Insulator Screw M4x0 7x8mm Torx T15 Pan Conical washer Spring Clip Insulator Rear Label Foot Screw M5x0 8x10mm Pozi Flat Patch Lock Screw M5x0 8x10mm Pozi Pan Patch Lock Relay Option Bracket Binding Post Plate Nut Hex 3 8 32 Nylon Nut Hex w Lockwasher 6 32 Side Trim Stud Mounted Standoff Washer Helical Lock 10 Washer Flat 10 Transformer Bracket Transformer Shim Cable Clip Screw M4x0 7x10mm Torx T15 Pan conical washer Screw M3x0 5x6mm Torx T10 Flat Patch Lock Screw M3x0 5x8mm Torx T10 Thread Rolling Screw M3x0 5x10mm Torx T10 Pan conical washer Nut Hex w lockwasher M3x0 5 Foam Pad Standoff snap in RFI Clip Screw Lock Kit ref RS232 Connector Operating Guide Programming Guide 4 Places 2 A ech 2 Places 2 Places 2 8 Places Places gt 277 St P LS irs Paces lt 7 E 7 TEN Replaceable Parts 5 ues 2 Places Option 020 EEES o o s a Figure 5 1 Mechanical Parts Identification of 5 Replaceable Parts Designator Al Al Al C300 C301 C303 C303 C303 C304 C305 C306 C307 C308 309 C310 C311 312 C313 C313 C313 C314 C315 316 C317 C318 319 C320 C321 C322 C323 C324 C325 327 C328 C330 C331 332 C333
21. Ohm 30 1K R428 3K R330 14 7K 14 7K R430 52 3K R333 5 11K 8 25K 8 25K R432 2 15 5 11K R334 0 Ohm R433 139 Ohm R337 316 Ohm 316 Ohm 750 Ohm R434 0 Ohms R339 10K 51 1k 215K R436 437 0 Ohms R340 200 Ohm 432 Ohm R439 500 Ohm R341 343 215 Ohm 432 Ohm 440 3 3 7 5 7 5 Ohm R342 80 6K 287K 464K R442 443 40K 100K 300K R348 316 Ohm 632 Ohm 1 5K R445 0 51 Ohm 0 33 1 5 R349 26 1 80 6K 130K R446 2 5K 5 2K 16 1K R350 3 16K 3 92 3 16 R447 499 Ohm R351 5K 6 2K 5K R449 0 Ohm R352 0 Ohm R450 1 Ohm R354 16 2K 51 1K 80 6K R452 2 15 5 11K R356 200K 249K 200K R453 10K R357 25K 22 22 22 22K R455 2 5K 5 2K 16 1K R359 0 Ohm R457 459 0 Ohm R362 39K 40K 40K R462 511 Ohm 511 Ohm 51 1 Ohm R364 25K 22 22 22 22K R463 3K R371 35 65K 25K 25K R466 1 Ohm 4 7 Ohm 12 1 Ohm R372 2 5K 3 2 3 2 R467 468 0 R373 100 Ohm R469 7 5 Ohm R376 35 65K 25K 25K R470 7 5 Ohm 7 5 Ohm R377 39K 40K 40K R473 0 05 Ohm 0 25 Ohm 0 5 Ohm R378 470 Ohm 3K 3K R488 487K 280K 3 16M R384 389 3 3 Ohm 7 5 Ohm R489 487K 1 25M 3 16M R385 2 5K 3 2K 3 2K R490 1M 3 16M 6 8 386 387 3 3 7 5 7 5 R496 497 13 3 3 32K 3 32K R392 5K 3K 3K R505 1 25M R393 10K 10K 4 45K R513 515 0 Ohm R394 100K 200K 164K R520 0 Ohm 0 Ohm R397 3K T300 Xfmr R404 10K U314 IC R407 410 3 3 Ohm 7 5 Ohm VR302 4 99V R408 409 3 3 Ohm 7 5 Ohm 7 5 Ohm VR303 6 2V 10V 10V R411 0 Ohm 0 Ohm VR304 305 2 4 3
22. Recommended models are listed Table 3 1 Test Equipment Required for Troubleshooting Recommended Model GPIB Controller To communicate with the supply via the HP Series 300 GPIB interface Digital Voltmeter To check various voltage levels Agilent 3458A Oscilloscope To check waveforms and signal levels Agilent 54504A 54111A Electronic Load Agilent 60608 IC Test Clips To access IC pins AP Products No LTC Ammeter Current To measure output current Guildline 9230 15 Shunt Overall Troubleshooting Overall troubleshooting procedures for the power supply are given in the Figure 3 1 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 error annunciator stays off The normal turn on self test indications are described in the Checkout Procedure in Chapter 3 of the User s Guide If the supply passes the self test and there are no obvious faults you should perform the verification procedures in Chapter 2 from the front panel to determine if any functions are not calibrated or are not operating properly Then program and read back a voltage via the GPIB to see if the supply responds properly to bus commands If the supply fails any of the tests you will be directed to the applicable flow chart or troubleshooting procedure Flow Charts Troubleshooting flow charts are given in Figure 3 1 sheets 1 10 Several flow charts make reference to the
23. as indicated on the front panel display Check that the CC annunciator of the UUT is on If it is not adjust the load so that the output voltage drops slightly e Adjust the transformer to the lowest rated line voltage f Record the output current reading DVM reading current monitoring resistor in ohms You may want to use the average reading program described under Load and Line Regulation g Adjust the transformer to the highest rated line voltage Record the output current reading again The difference in the current readings in steps f and h is the CC source effect and should not exceed the values listed in the performance test record card under CC SOURCE EFFECT 18 Verification and Performance Tests 2 CC Noise PARD Periodic and random deviations PARD in the output 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 frequency range 20 Hz to 20 Mhz with the supply in CC operation a Turn off supply and connect the load monitoring resistor and rms voltmeter across the monitoring resistor as shown in Figure 2 1a The Current Monitoring resistor may have to be substituted by one with a higher resistance and power rating such as a 1 ohm 50 W current shunt in series with the appropriate 3 24 or 99 ohm resistor to get the RMS voltage drop high enough to measure with the RMS voltmeter Lead
24. not adjust the load so that the output current drops slightly e Adjust the transformer to the lowest rated line voltage 2 104 Vac 115 Vac nominal line voltage input f Record the output voltage reading on the DVM g Adjust the transformer to the highest rated line voltage e g 127 Vac for 115 Vac nominal line voltage input h Record the output voltage reading on the DVM The difference between the DVM reading is steps f and h is the source effect voltage and should not exceed the value listed in the performance test record chart for the appropriate model 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 the frequency range specified in the User s Guide a Turn off supply and connect the output as shown in Figure 2 1a 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 Turn on the supply and program the current to the maximum programmable value and the output voltage to the full scale value c Adjust the load for the full scale current value 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 te
25. o o o C K601 o ee e e o ee K603 e o SE 6 R602 e P620 o e o 000 00 0 0 0 pL eel 1 C603 Figure 6 2 4 Board Component Locations LINE VOLTAGE FUSE RATING PART NUMBER 100V 120V 4A 250V 2110 0055 220V 7 240V 2A 250V 2110 0002 ve b _ A SINK L L L NO LOAD POWER RECTIFIER FILTER E mm AC LINE FILTER E E 1901 1199 n THEAT T1 Wee 640900 1 1205 0782 n E W FUSE HOLDER LINE SWITCH 81 4 MUR1529 2110 0927 gue vam 8151 8493 0311 8300 0300 deg 2 640900 1 C392 x 8 5 ce pem mm SCH csar n 250566 1 MURI520 ET e 8204183 10500 20 Messen T 2200p 4 6428 iud Tem 9 ca PHEZBSNAAZZONROS 0168 5422 0160 4849 5 em See E 8160 8181 Eed E 8120502134 01
26. service with the exception of warranty options this product must be returned to a service facility designated by Agilent Technologies Customer shall prepay shipping charges by and shall pay all duty and taxes for products returned to Agilent Technologies for warranty service Except for products returned to Customer from another country Agilent Technologies shall pay for return of products to Customer Warranty services outside the country of initial purchase are included in Agilent Technologies product price only if Customer pays Agilent Technologies international prices defined as destination local currency price or U S or Geneva Export price If Agilent Technologies 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 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 SPECIFICALLY DISCLAIMS THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE EXCLUSIVE REMEDIES THE REMEDIES PROVIDED HEREIN ARE THE CUST
27. 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 c Adjust the load for the full scale current 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 d Record the output voltage reading on the DVM connected to and S 14 Verification and Performance Tests 2 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 voltage and should not exceed the value listed in the performance test record chart 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 Turn on supply and program the current to the maximum programmable value and the output voltage to the full scale value d Adjust the load for the full scale current value as indicated on the front panel display The CV annunciator on the front panel must be on If it is
28. the OV SCR CR342 associated components Figure 3 1 Sheet 5 OV at Turn On continued 29 3 Troubleshooting 30 Program output on voltage and current full scale then check output voltage FS Prot off and Output OK Calibrate unit No Disable the protection feature by simultaneously pressing the 0 and 9 keys press the key until the display reads No Protect Off press the Up Arrow to display No Protect On then press enter Output V gt programmed value Yes Check FUSE signal U305B 7 approx 2 8V with 20V output FUSE signal OK Yes Y Problem may be defective A2 or one of the voltages to A2 Vmon Imon H P gt bias voltage 5Vs Figure 3 1 Sheet 6 FS Indicated but Fuse OK Go to Troubleshooting High Output Voltage sheet 12 Troubleshoot Fuse divider and amplifier circuit R393 394 U305 Program full scale voltage and current and enable output Measure output voltage with an external voltmeter Display zero V but output OK CV or CC Annunciator on Q305A base 11 4V Go to sheet 8 Check W7 Vmon and A2 Interface board Yes Go To sheet 9 Displays current equal to prog value Ye No CC_Prog R360 4 7V
29. 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 Also if computer controlled test setups are used the relatively 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 resis tor 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 the Operating Manual b Perform the Voltage Programming and Readback Accuracy test and the Current Programming and Readback Accuracy tests from this procedure Performance Tests NOTE A full Performance Test consists of only those items listed as Specifications in Table A 1 of the Operating Manual and that have a procedure in this document
30. weg 1 5 n em 155 487 0757 8138 8159 0005 8159 0005 E qur ES gu pr gus zur ES ue 8751 8288 9811 1512 8811 1672 811 1672 0811 1672 S gatt 1672 NC NSS 4350RG m 0598 4509 5853 08 Ken 0361 gus EN 0811 1612 gyo 5 res 0378 Det m 3 put one 8811 1672 9811 1672 25 9698 5351 B Raze a 8159 0005 D 1991 1128 811 1672 8160 4803 Been 8 gt 8329 R321 5 62k 1826 0643 0811 1672 0811 1672 b 4 y y ma SAIQ1A271JAAH 1991 0050 1901 9050 FEM 1853 0086 8638 3152 4 1826 1878 BAVIO SELECTED BAVIO SELECTED pd 571468 m 2 47 ADTI2UN 8159 0005 Y NO LOAD Ast LOAD nen 6352 NO LOAD 0320 gn 0683 0475 76328 8 Yo 5032 3485 0151 0442 8159 0005 9698 3444 5002 3405 e 05 J um gen e d 22u 100K 1 24 1 2 y 2 8757 8288 3149 8115 AsT 281 8751 0465 2158 32 9698 3456 e GS 1843 8666 1853 8666 1853 0656 1853 6556 KS e al xu cats 6421 daer os 11380 11236 3 8 EECH 0168 6836 0302 0424 see Ken zm p pem 9160 5422 8160 6800 NO LO pM 0 6 4822 0301 SMOICATZKAAH 1826 1378 0160 7236 hes KR POSITIVE CURRENT CONTROL CKT y 1 ES Lens ES 1854 0414 518 1853 9491 5 Vo MTM 2N3019 8157 8442 DES s NO LOAD LOAD g 2098 t cum Sg en 21 5K 8 8tu NC CR 1 Ss zum
31. 0160 4791 0160 4807 0160 5422 0160 5422 0160 4835 0160 4801 0160 4791 0160 4791 0160 4787 0160 4791 0160 4789 0160 4791 0160 4807 0160 4813 0160 4812 0160 4800 0160 4807 0160 5422 0160 5471 0160 4791 0160 4789 0160 6827 0160 5422 0160 4812 0160 5422 0160 5422 0160 5410 0160 5422 0160 5422 0160 4918 0160 6616 0160 5422 0160 4918 0160 6616 0160 5422 0160 8153 0180 4129 0160 8153 0160 8231 0160 8299 0160 8230 0160 5469 0160 4789 0160 4787 Qty Te bet Rh ben en ben ben ben hh ben Fa SO ben ben ben Fe Fe hh Replaceable Parts 5 Description Cap 10 pF 5 100V Cap 0 033 uF Cap 0 047 uF 20 Cap 10 pF 5 100V Cap 10 pF 5 100V Cap 0 033 uF Cap 0 047 uF 20 Cap 0 047 uF 20 Cap 0 1 uF 10 50V Not loaded Cap 100 pF 5 Cap 10 pF 5 100V Cap 10 pF 5 100V Cap 22 pF 5 100V Cap 10 pF 5 100V Cap 15 pF 5 100V Cap 10 pF 5 100V Cap 33 pF 5 100V Cap 180 pF 5 Cap 220 pF 5 100V Cap 120 pF 5 Cap 33 pF 5 100V Cap 0 047 uF 20 Cap 0 1 uF 5 50V Cap 10 pF 5 100V Cap 15 pF 5 100V Cap 0 022 uF 400V Cap 0 047 uF 20 Cap 220 pF 5 Cap 0 047 uF 20 Cap 0 047 uF 20 Cap 3300 pF 5 Cap 0 047 uF 20 Cap 0 047 uF 20 Cap 0 022 uF 20 Cap 6800 pF 20 Cap 0 047 uF 20 Cap 0 022 uF 20 Cap 6800 pF 20 Cap 0 047 uF 20 Cap 4700 pF Cap 1 uF 35V Cap 4700 pF Cap MET 100 uF Cap 50 uF 70V Cap 22 uF 15
32. 0V Cap 1 uF 10 50V Cap 15 pF 5 100V Cap 22 pF 5 100V 59 5 Replaceable Parts Designator C403 C405 C411 C420 C421 C422 C422 C423 C423 C424 C424 C425 C426 C427 C428 430 C431 432 C480 481 C482 C496 497 C498 C499 CR342 CR342 CR342 D300 303 D304 D305 306 D307 D308 D308 D309 D309 D310 60 Model 66332A 6632B All 6633B 6634B 6633B 6634B 6633B 6634B 6633B 6634B 6633B 6634B 6633B 6634B 6633B 6634B 6634B 6634B 6633B 6634B 6633B All 6633B 6634B All All 66332A 6632B 66332A 6632B 6633B 6634B All All All All 66332A 6632B 6633B 6634B 66332A 6632B 6633B 6634B 66332A 6632B Part Number 0160 4791 0160 3454 0160 7277 0160 6800 0160 6800 0160 6180 0160 7336 0160 6804 0160 7568 0160 6180 0160 7336 0160 4822 0160 6806 0160 0157 0160 6803 0160 5847 0160 5422 0160 6800 0180 4129 0160 4801 0160 7562 5060 3234 1205 0571 1884 0310 1901 0987 5060 3234 1205 0571 1884 0310 1901 0987 5060 3251 1884 0316 1205 0571 1901 0731 1901 1098 1901 0731 1901 1098 5060 3378 1901 1383 1205 0282 1901 1130 5060 3228 1901 0987 1205 0282 1901 1130 5060 3228 1901 0987 1205 0282 Qty Rh en be ben ben ben Fa ra i Fe Fe A FA DN ben Fe Fe Fe Fe Description 10 pF 5 100V Cap 220 pF 1KV Cap 2 2 uF Cap 0 022 uF 20 Cap 0 022 uF 20 Cap 1000 pF
33. 1 60022 5063 3433 5063 3434 06632 60002 9100 5501 9100 5567 9100 5568 3101 2862 06612 80001 06612 80002 06632 80004 06612 80008 06612 80003 5080 2452 5080 2448 5080 2457 5080 2457 06612 80010 8120 4383 8120 1350 8120 1369 8120 1689 8120 0698 8120 2104 8120 2956 8120 4211 8120 4753 he Ed ar a a nn a ni a ss Eet Jeck Description Control PCA Tested Control PCA Tested Control PCA Tested Interface PCA Tested Interface PCA Tested Front Panel PCA Tested Binding Post PCA Binding Post PCA AC Input RFI PCA Relay PCA Tested Fan Assembly Main Transformer Main Transformer Main Transformer Rocker Switch AC Line Cable A5 to S1 Cable 51 to Cable T1 to A1J303 Cable to Al J304 J305 T1 Jumper Cable A1 to A2 J206 Cable A1 to A2 J207 Cable A2 J210 to A6 J610 Cable A2 J211 to A3 J111 Cable A1 J314 to A4 J615 Line Cord Standard Option 903 Line Cord Option 900 Line Cord Option 901 Line Cord Option 902 Line Cord Option 904 Line Cord Option 906 Line Cord Option 912 Line Cord Option 917 Line Cord Option 918 55 5 Replaceable Parts Designator 1 2 2 4 5 6 6 6 6 7 MP8 MP9 MP10 11 12 13 14 15 16 17 MP18 MP19 MP20 MP21 MP22 MP23 MP24 MP25 MP26 MP27 28 MP29 MP30 MP31 MP32 MP33 MP34 MP35 MP36 MP37 MP3
34. 11 2553 1 Res 7 5 Ohm 5 2W PW R388 All 0757 0442 1 Res 10K 1 0 125W R389 66332A 6632B 0811 1672 1 Res 3 3 Ohm 5 2W R389 6633B 0811 2553 1 Res 7 5 Ohm 5 2W PW R390 391 All 0698 8834 2 Res 9K 0 1 0 125W R392 66332A 6632B 0698 6320 1 Res 5K 0 1 R392 6633B 6634B 0698 6348 1 Res 3K 0 1 0 125W R393 66332A 6632B 6633B 0698 6360 1 Res 10K 0 1 R393 6634B 0698 8865 1 Res 4 45K 0 1 0 1W R394 66332A 6632B 0698 6358 1 Res 100K 0 1 R394 6633B 0698 6376 1 Res 200K 0 1 0 1W R394 6634B 0698 7841 1 Res 164K 0 1 0 1W R395 396 All 0699 1866 2 Res 2 7K 0 1 R397 6634B 0698 3642 1 Res 3K 2W R398 All 0757 0442 1 Res 10K 1 0 125W R399 All 0698 6533 1 Res 12 5K 0 1 R400 401 All 0757 0442 2 Res 10K 1 0 125W R402 All 0757 0438 1 Res 5 11K 1 R403 All 0699 4484 1 Res 72 Ohm R404 66332A 6632B 0757 0442 1 Res 10K 1 0 125W R405 All 0698 8827 1 Res 1M 1 0 125W R406 All 0698 3456 1 Res 287K 1 R407 66332A 6632B 0811 1672 1 Res 3 3 Ohm 5 2W R407 6633B 0811 2553 1 Res 7 5 Ohm 5 2W PW R408 66332A 6632B 0811 1672 1 Res 3 3 Ohm 5 2W R408 6633B 6634B 0811 2553 1 Res 7 5 Ohm 5 2W PW R409 66332A 6632B 0811 1672 1 Res 3 3 Ohm 5 2W R409 6633B 6634B 0811 2553 1 Res 7 5 Ohm 5 2W PW R410 66332A 6632B 0811 1672 1 Res 3 3 Ohm 5 2W R410 6633B 0811 2553 1 Res 7 5 5 2W PW R411 66332A 6632B 6633B 8159 0005 1 Jumper R412 66332A 6632B 6633B 0698 3454 1 Res 215K 1 R412 6634B 0698 3459 1 Res 383K 1 R413 66332A 6632B 0757 0442 1 Res 10K 1 0 125W R414 All 0
35. 16 1K 0 1 R456 All 8159 0005 1 Jumper R457 66332A 6632B 8159 0005 1 Jumper R458 All 8159 0005 1 Jumper R459 66332A 6632B 8159 0005 1 Jumper R460 All 0698 6620 1 Res 150K 0 1 R461 All 0757 0395 1 Res 56 2 Ohm 1 R462 66332A 6632B 6633B 0757 0416 1 Res 511 Ohm 1 0 125W R462 6634B 0757 0394 1 Res 51 1 Ohm 1 0 125W R463 6634B 0698 3642 1 Res 3K 2W R464 465 All 0698 0084 2 Res 2 15K 1 R466 66332A 6632B 0698 8812 1 Res Ohm 1 0 125W R466 6633B 0683 0475 1 Res 4 7 Ohm R466 6634B 0757 0379 1 Res 12 1 Ohm R467 468 66332A 6632B 0811 1672 2 Res 3 3 Ohm 5 2W R469 66332A 6632B 0811 1672 1 Res 3 3 Ohm 5 2W R469 6633B 0811 2553 1 Res 7 5 Ohm 5 2W PW R470 66332A 6632B 0811 1672 1 Res 3 3 Ohm 5 2W R470 6633B 6634B 0811 2553 1 Res 7 5 Ohm 5 2W PW R471 66332A 6632B 0699 1797 1 Res 10M 5 0 25W R471 6633B 6634B 0683 1065 1 Res 10M R472 All 0757 0442 1 Res 10K 1 0 125W R473 66332A 6632B 0811 3770 1 Res 0 05 Ohm 1 R473 6633B 0811 3771 1 Res 0 25 Ohm 1 R473 6634B 0811 3772 1 Res 0 5 Ohm 1 R474 All 8159 0005 1 Jumper R476 All 0757 0281 1 Res 2 74K 1 R477 All 0757 0199 1 Res 21 5K 1 R478 479 All 0698 4444 2 Res 4 87K 1 R480 481 All 0757 0269 2 Res 270 Ohm 1 0 125W R482 All 0698 3226 1 Res 6 49K 1 R483 All 0698 5089 1 Res 33K 1 0 125W R488 66332A 6632B 0698 3922 1 Res 487K 0 1 R488 6633B 0699 1744 1 Res 280K 0 1 R488 6634B 0699 0070 1 Res 3 16M 1 R489 66332A 6632B 0698 3922 1 Res 487K 0 1 R489 6633B 0698 6950 1
36. 1mS 20V div across the output and turn on the supply while observing the scope for a momentary pulse greater than the supply rating Go to Troubleshooting Yes High Output Voltage sheet 7 Does the supply overshoot No Y Disable the OV circuit as described in paragragh Disabling Protection Features Output 0 zero volts Yes 4V A1R350 2 gt 2 or W7 Defective Yes Check C336 R356 3V U306B 7 gt R351 R349 1 2 and U306B Yes Check C335 R354 4V U306 8 R350 1 2 and 03068 Yes Go to sheet 5 Figure 3 1 Sheet 4 OV at Turn On 28 Troubleshooting 3 Continued from sheet 4 Connect a DC coupled scope across the output and press Protect Clear several times while observing the scope Go to Troubleshooting Pulses high Yes High Output Voltage sheet 12 No A1U306B 2 OV Detect High No U306B 8 3 8V Yes U306B 7 lt pin 8 gt Yes gt Check U306B 2 No No y Y Check OV Prog Check R349 R351 Comp C335 R356 Yes R350 R354 1 438 Check R441 Q318B SCR 0 6V2 9 2 Interface Board Note SCR is normally a pulse that Yes Check A1CR342 goes low for 5us to trip Q318A B amp D and
37. 2 1 R326 6633B 6634B 0698 3159 1 Res 26 1K 1 R327 All 0757 0280 1 Res 1K 1 0 125W R328 66332A 6632B 0683 0475 1 Res 20K 1 0 125W R328 6633B 6634B 0757 0346 1 Res 10 1 R329 66332A 6632B 0757 0449 1 Res 4 7 Ohm 5 0 25W R329 6633B 0757 0453 1 Res 30 1K 1 R329 6634B 0757 0458 1 Res 51 1K 1 R330 66332A 6632B 0757 0280 1 Res 1K 1 0 125W R330 6633B 6634B 0698 3156 1 Res 14 7K 1 R331 All 0757 0280 1 Res 1K 1 0 125W R332 All 0757 0199 1 Res 21 5K 1 R333 66332A 6632B 0757 0438 1 Res 5 11K 1 R333 6633B 6634B 0757 0441 1 Res 8 25K 1 R334 66332A 6632B 8159 0005 1 Jumper R335 All 0757 0438 1 Res 5 11K 1 R336 All 0757 0280 1 Res 1K 1 0 125W R337 66332A 6632B 6633B 0698 3444 1 Res 316 Ohm 1 0 125W R337 6634B 0757 0420 1 Res 750 1 0 125W R339 66332A 6632B 0757 0442 1 Res 10K 1 0 125W R339 6633B 0757 0458 1 Res 51 1k 1 0 125W R339 6634B 0698 3454 1 Res 215K 1 0 125W R340 66332A 6632B 0757 0407 1 Res 200 Ohm 1 0 125W R340 6633B 0757 0414 1 Res 432 1 0 125W R340 6634B 0757 0280 1 Res 1K 1 0 125W R341 66332A 6632B 0698 3441 1 Res 215 Ohm 1 R341 6633B 0757 0414 1 Res 432 1 0 125W R341 6634B 0757 0280 1 Res 1K 1 0 125W R342 66332A 6632B 0698 4509 1 Res 80 6K 1 R342 6633B 0698 3456 1 Res 287K 1 0 125W R342 6634B 0698 3260 1 Res 464K 1 0 125W R343 66332A 6632B 0698 3441 1 Res 215 Ohm 1 R343 6633B 0757 0414 1 Res 432 1 0 125W R343 6634B 0757 0280 1 Res 1K 1 0 125W R344 All 0757 0442 1 Res 10K 1 0 125W R345 All 0757 0280
38. 20 Cap 220 pF 20 Cap 0 047 uF 20 Cap 0 0047 uF 10 Cap 1000 pF 20 Cap 220 pF 20 Cap 1000 pF Cap 0 1 uF Cap 4700 pF Cap 0 047 uF 250v 20 Cap 0 22 uF Cap 0 047 uF 20 Cap 0 022 uF 20 Cap 1 uF 35V Cap 100 pF 5 Cap 6 8 uF 63 V SCR Rectifier Assembly CR342 D330 ref CR342 Heat Sink ref CR342 SCR MCR69 3 ref CR342 Power Diode D330 SCR Rectifier Assembly CR342 D330 ref CR342 Heat Sink ref CR342 SCR MCR69 3 ref CR342 Power Diode D330 SCR Heatsink Assembly ref CR342 SCR 2N6402 ref CR342 Heat Sink Diode Diode Diode Diode Rectifier Assembly ref D308 Power Diode ref D308 Heat Sink Diode Rectifier Assembly ref D309 Rectifier ref D309 Heat Sink Diode Rectifier Assembly ref D310 Rectifier ref D310 Heat Sink Designator D310 D311 D311 D312 D313 314 D315 D316 D317 D317 D318 D318 D319 321 D322 D323 324 D325 D326 D327 328 D329 D330 D335 D336 337 D400 D470 471 D499 F300 301 F302 F302 F303 F303 F304 F305 F305 F400 406 F401 405 407 J303 J304 J305 J307 J309 J314 J414 J508 L300 301 Model 6633B 6634B 66332A 6632B 6633B 6634B All All All All 66332A 6632B 6633B 6634B 66332A 6632B 6633B 6634B 6633B 6634B All All All All All All 66332A 6632B 6633B 66332A 6632B All 6634B All 66332A 6632B 6633B All 66332A 6632B 6633B 6634B 66332A 6632B 6633B 6634B All 66332A 6632B 6633B 6634B All 66332A 6632B All All All Al
39. 53 1902 0958 1902 0943 1902 0947 1902 0943 1902 0947 1902 0953 1902 0957 8159 0005 Qty NRO i Fe Fe Fe ben ben Fe en ben ben ben ben ben Fon Fe a be ben Fe ra Replaceable Parts 5 Description Res 13 3K 1 Res 3 32K 0 125W Res 200 Ohm 1 0 125W Res 3 3 Ohm 5 2W Replaced by wire in 6633B 6634B units Thermistor Switch Right Angle Slide Current Transformer Jumper 15V Regulator Assembly ref U300 Integrated Circuit ref U300 Heat Sink 5V Regulator Assembly Interface Bias ref U301 Integrated Circuit ref U301 Heat Sink 5V Regulator Assembly Secondary Bias ref U302 Heat Sink ref 7302 Integrated Circuit Integrated Circuit 15V Regulator Assembly ref U304 Integrated Circuit ref U304 Heat Sink Integrated Circuit Integrated Circuit Integrated Circuit Integrated Circuit Integrated Circuit Integrated Circuit Integrated Circuit Integrated Circuit Integrated Circuit Integrated Circuit Integrated Circuit Zener Diode 9 1V 5 Zener Diode 4 99V 5 Zener Diode 6 2V 5 Zener Diode 10V 5 Zener Diode 2 4V 5 Zener Diode 3 6V 5 Zener Diode 2 4V 5 Zener Diode 3 6V 5 Zener Diode 6 2V 5 Zener Diode 9 1V 5 Jumper 69 5 Replaceable Parts A2 Interface PCA Tested for 66332A A2 Interface PCA Tested for 6632B 6633B 6634B A3 Front Panel PCA Tested for all models Designator A4 A4 C603 604 J615 MP5 MP26 MP25 24 WIS Design
40. 57 0283 0757 0280 0698 3279 0698 4202 0757 0280 0757 0442 0698 3156 0686 2225 0698 0092 0683 0475 0757 0346 0757 0442 8159 0005 0757 0401 8159 0005 0698 3444 0757 0416 0757 0420 0757 0427 0698 0085 0757 0280 0698 4509 0698 3454 0698 4536 0757 0280 0757 0280 0757 0438 0698 3156 0757 0280 0757 0438 0757 0280 0698 3156 0757 0438 Qty kon ben Fe be ben ben ben ben Fe Fe Fe bn ka EA ben ben Fe Fe en bet ke Lui Fe ben ben Fe ben Fe Fe Fe Fe Fe Replaceable Parts 5 Description Transistor NPN Transistor NPN Transistor FET Transistor PNP Transistor PNP Transistor Array Transistor PNP Res 3K 5 2W MO Res 33K 5 2W MO Res 121 Ohm 1 0 125W Res 511 1 0 125W Res 2k 1 0 125W Res 121 Ohm 1 0 125W Res 511 1 0 125W Res 2k 1 0 125W Res 1K 1 0 125W Res 4 99K 1 Res 8 87K 1 Res 1K 1 0 125W Res 10K 1 0 125W Res 14 7K 1 Res 2 2K 5 0 5W Res 2 61K 1 Res 4 7 Ohm 5 0 25W Res 10 1 Res 10K 1 0 125W Jumper Res 100 Ohm 1 0 125W Jumper Res 316 Ohm 1 0 125W Res 511 1 Res 750 1 Res 1 5K 1 0 125W Res 2 61k 1 Res 1 80 6 1 Res 215k 1 Res 340k 1 Res 1K 1 0 125W Res 1K 1 0 125W Res 5 11K 1 Res 14 7K 1 Res 1K 1 0 125W Res 5 11K 1 Res 1K 1 0 125W Res 14 7K 1 Res 5 11K 1 63 5 Replaceable Parts Designator Model Part Number Qty Description R326 66332 6632 0757 0200 1 5 6
41. 60 5422 8362 8887 8168 4259 128022 SAZOSCATIMAAH Stern fr 350566 1 PHE2TING22K j IE EID E TO CHASSIS m 2 sa LOAD BEI PNEZS9N 4220NR05 640990 1 caer Pm ACC 0160 8181 1 WHT GRA 1251 6832 1 2 can H0310 aen 3 SternjS xfr gt 5812 304 4 ES 0168 5422 d odo 8 841 Se SC A 9362 8807 SAZOSCATIMAAH 0160 5422 ram ae 2118 6697 0160 6802 IPEE SINK mer dw dae 145 qum 9157 0403 1901 0987 pe sri Ten 8420504714 1309 Weem 8180 3965 9189 3965 WHT BRN GRA 648980 1 1251 6832 1285 0350 TT menr T mes GRA 1304 5 F302 e SNO 0309 1 2 14 sternjs xfr e E E ru 2110 0897 pim Seen THEAT SWK 0332 bhi war L FAN DRIVER W LOAD 15V AND 5V SECONDARY BIAS SUPPLIES m 68250 1285 0282 R522 Fe Fe 8 876 9757 0436 0757 0438 698 4202 4 92225 411 D 8 AH 165 2 8160 4831 0312 2 0309 7115 0057 SATO1CATZKAMH 4 SG20CXGROODSB2ARZ 4 0304 002 EN E SR 454 0628 17 TP 122 22 21 2031 aternjs 1252 0063 gt VR WR KEN ET 1901 0191 d 1115 0881 62106944 SO20CXOROGOSB2MZ SH 1902 0955 1826 8105 60250 1826 0122 hes 5738815 1 0301 MCTBISCT s 22000 BE 6381 aj 9189 4033 KS RE 5 1991 0731 SMESSVB222M16X31N0 lu ga 3 aj 9189 4129 0 041
42. 699 0088 1 Res 1 2M 1 R415 66332A 6632B 0698 6392 1 Res 22K 0 1 0 125W R415 6633B 6634B 0699 1510 1 Res 22 22K 0 1 125W R416 All 0686 7515 1 Res 750 Ohm 5 0 5W R417 All 0757 0442 1 Res 10K 1 0 125W R418 66332A 6632B 0757 0458 1 Res 51 1K 1 R418 6633B 0698 3201 1 Res 80K 1 R418 6634B 0698 5092 1 Res 160K 1 R419 All 0757 0442 1 Res 10K 1 0 125W R420 All 0699 1972 1 Res 1 74M 0 1 0 125W 66 Designator R421 R421 R422 R423 R423 R425 R427 R427 R428 R429 R429 R430 R431 R432 R432 R432 R433 R434 R435 R436 437 R438 R439 R440 R440 R441 R442 R442 R442 R443 R443 R443 R444 R445 R445 R445 R446 R446 R446 R447 R448 R449 R450 R451 R452 R452 R452 R453 R454 Model 66332A 6632B 6633B 66332A 6632B 66332A 6632B 6633B 6634B 66332A 6632B 66332A 6632B 6633B 6634B 6634B 66332A 6632B 6633B 6634B 66332A 6632B All 66332A 6632B 6633B 6634B 66332A 6632B 66332A 6632B All 66332A 6632B All 66332A 6632B 66332A 6632B 6633B 6634B All 66332A 6632B 6633B 6634B 66332A 6632B 6633B 6634B All 66332A 6632B 6633B 6634B 66332A 6632B 6633B 6634B 66332A 6632B All 66332A 6632B 66332A 6632B All 66332A 6632B 6633B 6634B 66332A 6632B All Part Number 0811 1672 0811 2553 0698 6351 0699 0267 0699 0278 0698 4539 0757 0442 8159 0005 0698 3642 0699 0267 0699 0278 0757 0272 0757 0438 0757 0280 0698 0084 0757 0438 0698 4099 8159 0005 8159 0005 0811 1672 8159 0005 0698 631
43. 6V 3 6V R412 215K 215K 383K VR335 6 2V 9 1V 9 1V 72 Diagrams 6 Table 6 2 A1 Board Component Locations 73 6 Diagrams Table 6 2 continued U U U U U U U U U U U U U U U U U 74 RATE R 9507 5 C374 5 a 7 R351 let REA 5323 A 0000000 XF301 R324 0518 300 521 e 999999 wi ee MOTE 2441 837 D Q309 4311 4515 CR343 2 0319 e 6l dle 2 e See 4 R387 R408 R440 F406 R467 EN CH N J 0308 0310 0312 0317 0430 CEER R378 R428 Bid og 75 62 Figure 6 1 Board Component Locations r 40 WATT ONLY 100 WATTS ONLY L601 1602 4615 1 C601 C607 C603 C605 To 220PF _ 4200PF _ 220PF 5000 2000 2500 1KU E316 O GND C602 C608 C604 C606 01 220 4200PF 5000 2000 2500 IKU J615 3 L603 gt J615 4 1604 BP2 e 5604 9 e 00000 a 8 e gt 0000 2s e e e
44. 7 0811 1672 0811 2553 0698 4486 0699 1513 0699 3416 0699 3448 0699 1513 0699 3416 0699 3448 0757 0438 0811 0929 0812 0019 0811 1220 0698 6631 0698 8863 0699 0489 0698 4123 8159 0005 8159 0005 0698 8812 8159 0005 0757 0280 0698 0084 0757 0438 0698 6360 8159 0005 Qty kon ben Fe re et bet bet ben ben ben ben Fe ben ben ben ben Fe Fe ka SO Fe ben ben Fe ben Fe Fe bet Fe Fe Fe Replaceable Parts 5 Description Res 3 3 Ohm 5 2W Res 7 5 Ohm 5 2W PW Res 133K 0 1 Res 10K 0 05 Res 15K 0 05 0 1W Res 402K 1 Res 10K 1 0 125W Jumper Res 3K Res 10K 0 05 Res 15K 0 05 0 1W Res 52 3K 1 Res 5 11K 1 Res 1K 1 0 125W Res 2 15K 1 Res 5 11K 1 Res 139 Ohm 196 0 125W Jumper Jumper Res 3 3 Ohm 5 2W Jumper Res 500 Ohm 0 1 Res 3 3 Ohm 5 2W Res 7 5 599 2W PW Res 24 9K 1 Res 40K 0 05 Res 100K 0 0596 0 1W Res 300K 0 05 0 1W Res 40K 0 05 Res 100K 0 05 0 1W Res 300K 0 05 0 1W Res 5 11K 196 Res 0 51 Ohm 5 2W Res 0 33 5 2W PW Res 1 5 5 2W PW Res 2 5K 0 1 Res 5 2K 0 1 Res 16 1K 0 196 Res 499 Ohm 1 0 125W Jumper Jumper Res 1 Ohm 196 0 125W Jumper Res 1 0 125W Res 2 15K 1 Res 5 11K 196 Res 10K 0 196 Jumper 67 5 Replaceable Parts Designator Model Part Number Qty Description R455 66332A 6632B 0698 663 1 1 Res 2 5K 0 1 R455 6633B 0698 8863 1 Res 5 2K 0 1 R455 6634B 0699 0489 1 Res
45. 8 MP39 MP40 MP41 MP42 56 Model All All All All All All 66332A 6632B 6633B 6634B All All All All All All All All All All All All All All All All All All All All All All All All All All All All All All All All All All All All All All Table 5 2 Chassis Mechanical Part Number 06612 00002 5063 3426 5063 3443 0370 3238 06612 40001 1510 0091 66332 80001 06632 80019 06633 80002 06634 80002 5001 9847 5041 8819 5041 8820 5062 3702 06624 20007 1252 1488 06611 40006 5020 2859 06612 20002 0515 0433 1400 1826 06612 20001 06612 80004 5041 8801 0515 1117 0515 1132 06612 00005 06612 00004 2950 0144 0590 0305 5001 0538 0380 0644 2190 0034 3050 0849 5001 6788 5001 6787 1400 1281 0515 0380 0515 1946 0515 2535 0515 0374 0535 0031 0460 2362 0380 2086 8160 0916 1252 3056 5962 0872 5962 8108 Qty PSP Bee NNN ra ND gt Description Chassis Front Panel Assy Std unit Front Panel Assy Option 020 Knob 6mm Keypad Binding Post Single Red Nameplate 66332A Nameplate 6632B Nameplate 6633B Nameplate 6634B Top Cover Strap Handle Cap front Strap Handle Cap rear Strap Handle Barrier Block Cover Terminal Block 4 Position RI DFI Fan Spacer G10 Main Heat Sink Thermal
46. 80 2457 Qty ta ra A ra ra Description Relay PCA Tested Cap 0 047 uF 20 Cap 0 01 uF Fuse 0 125AM 125V Connector Relay 2C 12VDC Power Relay Res 220 Ohm 5 0 5W Res 178 Ohm 1 0 125W Res 150 Ohm 1 0 125W Res 178 Ohm 1 0 125W Res 150 Ohm 1 0 125W Res 178 Ohm 1 0 125W Transistor Array Cable A2 J210 to A6 J610 Diagrams Introduction This chapter contains drawings and diagrams for troubleshooting and maintaining the Agilent Model 66332A Dynamic Measurement DC Source and the Agilent Model 66332A 6632B 6633B 6634B System DC Power Supplies Unless otherwise specified in the drawings a drawing or diagram applies to all models and input voltage options General Schematic Notes Components marked with an asterisk are model dependent See Table 6 1 resistors are in ohms 1 1 8 unless otherwise specified resistors are in ohms 1 1 8 unless otherwise specified capacitors are in microfarads unless otherwise specified Unless otherwise noted bias connections to integrated circuit packages are as follows Common 5 14 packages 7 14 16 packages 8 16 20 pin packages pin 10 pin 20 Designator C300 304 307 C302 C313 314 316 C331 332 C333 C335 C340 C344 346 C349 352 C359 C360 C361 C362 C372 373 C375 C376 377 C378 C382 C383 C403 66332A 6632B 0 047 uF
47. 9 1510 0698 6392 0757 0436 0757 0442 0699 0934 0699 2246 0699 0236 0699 1867 0757 0401 0757 0458 0699 0934 0699 2246 0698 8807 0699 1513 0698 3634 0698 3642 0757 0436 0757 0401 0698 8959 0757 0401 0698 3460 0811 1672 0811 2553 0699 0236 0699 1867 Qty Rh ben Fe ren e ka Fa A ben Fe Fa ra ye ben ben ben ben Fe hh a 2 2 2 2 pa Replaceable Parts 5 Description Res 5K 0 1 Res 6 2K 1 Res 5K 1 Jumper Res 619K 1 Res 16 2K 1 Res 51 1K 1 Res 80 6K 1 Res 2 15K 1 Res 200K 1 Res 249K 1 Res 200K 1 Res 25K 0 05 Res 22 22K 0 05 Not loaded Jumper Res 25K 0 05 Res 39K 0 1 Res 40K 0 05 Res 221K 1 Res 25K 0 05 Res 22 22K 0 05 Res 22K 0 1 0 125W Res 4 32K 1 Res 10K 1 0 125W Res 35 65K 0 1 Res 25K 0 05 Res 2 5K 0 1 0 1W Res 3 2K 0 1 0 1W Res 100 Ohm 1 0 125W Res 51 1K 1 Not loaded Res 35 65K 0 1 Res 25K 0 05 Res 39K 0 1 Res 40K 0 05 Res 470 Ohm 5 2W Res 3K 5 2W MO Res 4 32 1 Res 100 Ohm 1 0 125W Res 619K 1 0 125W Res 100 Ohm 1 0 125W Res 422K 1 Res 3 3 Ohm 5 2W Res 7 5 Ohm 5 2W PW Res 2 5K 0 1 0 1W Res 3 2K 1 0 125W 65 5 Replaceable Parts Designator Model Part Number Qty Description R386 66332 6632 0811 1672 1 Res 3 3 Ohm 5 2W R386 6633B 6634B 0811 2553 1 Res 7 5 Ohm 5 2W PW R387 66332A 6632B 0811 1672 1 Res 3 3 Ohm 5 2W R387 6633B 6634B 08
48. AMP N 6698 3159 0757 0438 E OV SCRe ES 3159 0005 Len 9797 6200 4448 LOAD 1826 1534 PM_INHIBIT TUNNEL 1252 5911 3 we THERMISTOR d 1826 1278 e H 4 450 DO 3 1 2 lt IMON H 0011 7282 2425 E Sie zm 1826 0346 8157 0476 LN359N 9757 0442 Ki 471 E 2 41 4 NO LOAD gt amp HS THERM x 2 T H P D om EN 5 asd erae 0 041 2 d al 0160 5422 0160 5422 3 a 1902 0968 1902 0960 125 I83LFU 208 R427 8157 8487 3153 0905 Y ral ASG Dn Gm C gt Figure 6 3 1 Board schematic sheet 2 VOLTAG E CONTROL CKT
49. E OR ADJUST ALONE Do not attempt internal service or adjustment unless another person capable of rendering first aid and resuscitation is present 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 DO NOT SUBSTITUTE PARTS OR MODIFY INSTRUMENT Because of the danger of introducing additional hazards do not install substitute parts or perform any unauthorized modification to the instrument Return the instrument to an Agilent Technologies Sales and Service Office for service and repair to ensure that safety features are maintained SAFETY SYMBOLS Refer to the table on the following page WARNING 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 Caution The CAUTION sign denotes a hazard It calls attention to an operating procedure or the like which if not correctly 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 Des
50. Load output to put unit into CC and measure output current with extrenal amp meter Display and measured Yes Output Voltage near zero Voltage close gt If output is OK but meter wrong replace A2 If both are off check gain of Voltage Monitor Amplifier A1U315B Yes Yes v Go to Calibrate Voltage Troubleshooting No Output Voltage sheet 7 Current close to Yes Y Program OV below output voltage Troubleshooting Yes Y Program OV to maximum and reset protection Go to sheet 3 Go to Calibrate Current Troubleshooting No If output is OK but meter wrong replace A2 If in CC but both are off check gain of Current Monitor Amplifiers and Monitor Resistor R403 473 values the current is lower than programmed and UNReg is displayed check A1Q307 and Output Stage Current limit sheet 10 Go to Unit Does not OV sheet 11 Figure 3 1 Sheet 2 Main Flowchart continued Troubleshooting 3 Continued from sheet 2 Program output and readback via GPIB GPIB works Nop Replace A2 Interface board Do full performance test to determine if unit is operating properly Figure 3 1 Sheet 3 Main Flowchart continued 27 3 Troubleshooting Connect a DC coupled scope set to
51. MENO 1 H hi 0288 Geng 8158 0086 va R457 m 42 5053HD1ROBAF n a d No LOAD pua m NETO 0168 8183 3100 4158 e sad 5 2 3485 5600213405 IC Une 1115 0657 7115 8957 BE oaz m egene E Wa Kb 2456 our L S i e 5 2 2 1 2 5 d ws e Gs SS 2 02341 7777 ZOPPR bn Hr SO20CKOROROSU2MZ OUT P SG20CXGROBOSS2MZ 26505580088 148137 33 8452 8699 4484 0157 0282 re STAR c 8169 4897 LL Ka 229p ba 1 2 maen 8698 6360 SENSE 309 4 1115 0857 8368 2338 8598 8984 CROWBAR CONTROL ee EE D 9160 5422 7 1958 0074 D 1858 0854 2388 5 8168 7277 R494 756 R433 8439 8368 2338 2686 1515 50 720505590008 1 2 1 2 Di CUT 4 JUMPERS FOR 5 1 m 0699 4055 CUT JUMPERS FOR RELAY OPTION 8168 7562 58332 IMON P BINDING POST OPTION 845 139 5 1 1826 1195 4 4 2 3228105 8 6 i 8 25k b s 1 To 0698 8812 8188 4123 24 0157 0441 sazoscaTanaad A Chessis Ju 5 11k 0168 5422 9362 8887 Gnd C388 8157 0438 3 350566 1 5843kEDSK MF 1858 8074 6 d 1858 005 227 pe SCRe p 0005 m 24 15 D 239 9538 4123 5410142214 GE E As2 INTERFACE PCB LOW RANGE CURRENT MONITOR AMP CV DETECT 2107 28 EM DETECTe gt 0160 4901 KE CC ETECT mz Rieger 1 2 VOL we hes OLTAGE MONITOR AMP T 565 X NO LOAD
52. OMER S SOLE AND EXCLUSIVE REMEDIES AGILENT TECHNOLOGIES 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 contacts product maintenance agreements and customer assistance agreements are also available Contact your nearest Agilent Technologies Sales and Service office for further information on Agilent Technologies full line of Support Programs Safety Summary The following general safety precautions must be observed during all phases of operation of this instrument Failure to comply with these precautions or with specific warnings elsewhere in this manual violates safety standards of design manufacture and intended use of the instrument Agilent Technologies assumes no liability for the customer s failure to comply with these requirements 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 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 BEFORE APPLYING POWER Verify that the product is set to match the available line voltage the correct lin
53. Panel Board Removal and Replacement First remove the front panel assembly as described under Front Panel Assembly Removal and Replacement Once you have access to the front panel board perform these steps a Remove the RPG knob by pulling it away from the front panel b Use a Torx T10 driver to remove the screw that secures the board to the front panel assembly c Slide the board to the left to disengage the holding clips then lift it out d To reinstall the Front Panel board perform the above steps in reverse order A1 Main Control Board a Remove the top cover and the A2 Interface board as previously described b Disconnect all cables going to connectors on the main control board NOTE Be sure to note the position and orientation of all cables prior to removal so that no mistake is made later when reinstalling these cables c Ifyour power supply is equipped with a relay option board remove the Torx T10 screw that holds the relay board bracket d Remove four Torx T15 screws that secure the main control board to the chassis e Slide the main board towards the front panel to release it from chassis mounted standoffs and then lift the board out of the chassis 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 a Remove the three Torx T10 screws securing the rear of the tran
54. Parts Designator Model Part Number Qty Description Q300 All 5060 3245 1 Darlington Fan Driver Assembly All 1854 0828 1 ref Q300 Transistor NPN SI All 1205 0282 1 ref Q300 Heat Sink Q301 66332A 6632B 6633B 1854 0474 1 Transistor NPN Q301 6634B 1854 0575 1 Transistor NPN Q302 66332A 6632B 6633B 1854 0474 1 Transistor NPN Q302 6634B 1854 0575 1 Transistor NPN Q303 66332A 6632B 06612 60008 1 Transistor Driver Assembly 1854 0872 1 ref Q303 Transistor NPN 1205 0350 1 ref Q303 Heat Sink Q303 6633B 06633 60009 1 Assembly Transistor Heat Sink 1854 0920 1 ref Q303 Transistor NPN 1205 0571 1 ref Q303 Heat Sink Q303 6634B 06634 60009 1 Transistor HS Assembly 1205 0571 1 ref Q303 Heat Sink 1854 0838 1 ref Q303 Transistor NPN Q304 66332A 6632B 06612 60009 1 Transistor Driver Assembly 1205 0350 1 ref Q304 Heat Sink 1853 0497 1 ref Q304 Transistor PNP Q304 6633B 5063 3451 1 Assembly Transistor Heat Sink 1853 0652 1 ref Q304 Transistor PNP Q304 1205 0571 1 ref Q304 Heat Sink Q304 6634B 5063 3451 1 Transistor HS Assembly 1853 0652 1 ref Q304 Transistor PNP Q304 1205 0571 1 ref Q304 Heat Sink Q305 All 1858 0054 1 Transistor Array Q306 All 1853 0336 1 Transistor PNP Q307 All 1853 0086 1 Transistor PNP Q308 66332A 6632B 1854 1174 1 Transistor NPN Q308 6633B 6634B 1854 1362 1 Transistor NPN Q309 66332A 6632B 1854 1174 1 Transistor NPN Q309 6633B 6634B 1854 1362 1 Transistor NPN Q310 66332A 6632B 1853 0656 1 Transistor PNP Q310 6633B 6634B 1853
55. Res 1 25M 0 1 0 5W R489 6634B 0699 0070 1 Res 3 16M 1 R490 66332A 6632B 0699 0730 1 Res 1M 0 1 490 6633 0699 0070 1 3 16 1 490 6634 0683 6855 1 6 8 5 R493 All 0757 0438 1 Res 5 11K 1 R494 495 0698 8812 2 Res 1 Ohm 1 0 125W R496 66332A 6632B 0757 0289 1 Res 13 3K 1 R496 6633B 6634B 0757 0433 1 Res 3 32K 0 125W 68 Designator R497 R497 R498 500 R505 R510 517 R520 R521 R522 RT301 300 T300 T300 U300 U301 U302 U303 U304 U305 U306 U308 U309 U310 U311 U313 U314 U315 U400 VR300 VR301 VR302 VR303 VR303 VR304 VR304 VR305 VR305 VR335 VR335 W300 301 Model 66332A 6632B 6633B 6634B All 6633B 66332A 6632B 6633B 6634B All All All All 66332A 6632B 6633B 6634B All All All All All All All All All All All All All All All All All All All All 66332A 6632B All All All All 6634B 66332A 6632B 6633B 6634B 66332A 6632B 6633B 6634B 66332A 6632B 6633B 6634B 66332A 6632B 6633B 6634B All Part Number 0757 0289 0757 0433 0757 0407 Not Used 0811 1672 Not Used Not Used Not Used 0837 0397 3101 2927 9100 4350 8159 0005 5060 3229 1826 0214 1205 0282 5063 2389 1826 1597 1205 0402 5060 2948 1205 0282 1826 0122 1826 1533 5060 3232 1826 0106 1205 0282 1826 0346 1826 1370 1826 1534 1826 3521 1826 2252 1826 3521 1826 1878 1826 3521 1826 1878 1826 0643 1902 0955 1902 0957 1902 3092 1902 09
56. Service Manual Agilent Model 66332A Dynamic Measurement DC Source and Agilent Model 6632B 6633B 6634B System DC Power Supply Agilent Technologies Agilent Part No 5962 8119 Printed in Malaysia Microfiche No 6962 8120 September 2000 Warranty Information CERTIFICATION Agilent Technologies certifies that this product met its published specifications at time of shipment from the factory Agilent Technologies further certifies that its calibration measurements are traceable to the United States National Bureau of Standards to the extent allowed by the Bureau s calibration facility and to the calibration facilities of other International Standards Organization members WARRANTY This Agilent Technologies hardware product is warranted against defects in material and workmanship for a period of three years from date of delivery Agilent Technologies software and firmware products which are designated by Agilent Technologies 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 will at its option either repair or replace products which prove to be defective Agilent Technologies does not warrant that the operation for the software firmware or hardware shall be uninterrupted or error free For warranty
57. V Cap 2200 uF 35 V Cap 0 047 uF 20 Cap 0 047 uF 20 Cap 8200 uF 16V Cap 0 047 uF 20 Cap 33 000 uF 25V Cap 18 000 uF 16V Cap 8200 uF 16V Cap 0 047 uF 20 Cap 0 047 uF 20 Cap 0 047 uF 20 Cap 1 uF 35V Cap 10 uF 20V Cap 1 uF 35V Cap 0 047 uF 20 Cap 4700 pF 10 Cap 1 uF 35V Cap 0 047 uF 20 Cap 0 22 uF 10 Cap 0 01 uF 10 Cap 2200 pF 10 Cap 0 033 uF 10 Cap 0 047 uF 20 0 1 uF 10 50V Cap 3300 pF 100V Cap 3300 pF Cap 0 047 uF 10 Cap 220 pF 5 Cap 0 047 uF 20 Cap 0 01 uF 250V Cap 0 047 uF 20 Cap 0 047 uF 20 Cap 0 022 uF Not loaded Cap 0 047 uF 20 Cap 0 022 uF Cap 0 022 uF 400V Cap 0 047 uF 20 Designator C349 C349 C350 C351 C352 C352 C353 354 C355 C355 C356 C357 C358 C359 C359 C360 C360 C360 C361 C362 C362 C362 C363 C364 C365 C366 367 C368 C369 C370 C371 C372 373 C374 C375 C375 C376 C376 C376 C377 C377 C377 C378 C379 C380 C381 C382 C382 C382 C383 C384 C386 Model 66332A 6632B 6633B 6634B All All 66332A 6632B 6633B 6634B All 66332A 6632B 6633B 6634B All All All 66332A 6632B 6633B 6634B 66332A 6632B 6633B 6634B 66332A 6632B 66332A 6632B 6633B 6634B All All All All All All All All 66332A 6632B All 66332A 6632B 6633B 6634B 66332A 6632B 6633B 6634B 66332A 6632B 6633B 6634B 66332A 6632B All All All 66332A 6632B 6633B 6634B 66332A 6632B All All Part Number 0160 4791 0160 4807 0160 5422 0160 4791
58. V range which corresponds to the zero to full scale output current range of the supply If the output current exceeds the programmed current Imon H goes high and produces a more negative going CC signal which reduces the input to the voltage gain stage and lowers the output current Conversely if the output current is less than the programmed current Imon H goes low and produces a more positive going CC signal which increases the input to the voltage gain stage and raises the output current When the supply is sinking current only the CV control circuit or the CCN control circuit can be active In this case the supply is acting as a load instead of a power source and will attempt to pull the output voltage down by drawing off current from the externally applied source The current that will be drawn from the externally supplied source is determined by the Prog signal When the current required to reduce the voltage is less than the programmed current value the CV control circuit is active and regulates the output voltage When the current required to reduce the voltage exceeds the programmed current value the CCN control circuit is active It regulates the output current by comparing the negative signal to the inverted Prog signal During operation a PM Inhibit signal will cause the turn on control to turn off the bias to the voltage gain stage and shut down the output 1f any of the following occur 52 Principles of Ope
59. a unique number assigned to each power supply Table of Contents Warranty Information Safety Summary Notice Printing History Instrument Identification Table of Contents INTRODUCTION Organization Safety Considerations Related Documents Revisions Manual Revisions Firmware Revisions Electrostatic Discharge VERIFICATION AND PERFORMANCE TESTS Introduction Test Equipment Required Measurement Techniques Setup for Most Tests Electronic Load Current Monitoring Resistor Operation Verification Tests Performance Tests Programming Constant Voltage CV Tests CV Setup Voltage Programming and Readback Accuracy CV Load Effect CV Source Effect CV Noise PARD Transient Recovery Time Constant Current CC Tests CC Setup Current Programming and Readback Accuracy Current Sink CC Operation CC Load and Line Regulation CC Load Effect CC Source Effect CC Noise PARD Performance Test Equipment Form Performance Test Record Form TROUBLESHOOTING Introduction Test Equipment Required Overall Troubleshooting Flow Charts Specific Troubleshooting Procedures Power on Self test Failures CV CC Status Annunciators Troubleshooting Bias and Reference Supplies J307 Voltage Measurements Manual Fan Speed Control Disabling Protection Features Post repair Calibration Inhibit Calibration Switch Calibration Password Initialization ROM Upgrade Identifying the Firmware Upgrade Procedure Disassembly Procedures List of Req
60. adation of performance even when an actual failure does not occur When working on the dc power supply observe all standard antistatic work practices These include but are not limited to e Working at a static free station such as a table covered with static dissipative laminate or with a conductive table mat Agilent P N 9300 0797 or equivalent e Using a conductive wrist strap such as Agilent P N 9300 0969 or 9300 0970 e Grounding all metal equipment at the station to a single common ground e Connecting low impedance test equipment to static sensitive components only when those components have power applied to them Removing power from the dc power supply before removing or installing printed circuit boards 10 Verification and Performance Tests Introduction This document contains test procedures to verify that the dc power supply is operating normally and is within published specifications There are three types of tests as follows Built in Self Tests These tests run automatically when the power supply is turned on check most of the digital circuits and the programming and readback DACs Operation Verification These tests verify that the power supply is probably operating normally but do not check all of the specified operating parameters Performance Tests These tests check that the supply meets all of the operating specifications as listed in the Operating Manual NOTE power supply must pass the bui
61. ator 5 C500 C501 502 F500 F500 J508 500 Designator 6 600 C601 602 F601 602 J610 K601 603 K604 605 R601 602 R603 R604 R605 R606 R607 U601 W10 70 5063 3439 No user replaceable parts 5063 3429 No user replaceable parts 5063 3432 No user replaceable parts Table 5 4 Binding Post Option 020 Model 6633B 6634B 66332A 6632B All All All All All All All Model All All All All All All All Model All All All All All All All All All All All All All All All Part Number 5063 3406 06611 60022 0160 8153 1252 0056 1510 0091 0590 0305 2950 0144 06612 00004 06612 80010 Qty Kei H Ne Description Binding Post PCA Binding Post PCA Cap 4700 pF 4 Pin Connector Binding Post Single Red Nut Hex 6 32 w Lockwasher Nut Hex 3 8 32 Nylon Binding Post Plate Cable A1 J314 to A4 1615 Table 5 5 A5 AC input RFI Board Part Number 5063 3433 0160 4259 0160 8181 2110 0055 2110 0002 1252 3771 2110 0927 Qty 1 Fa N Description AC Input RFI PCA Cap 0 22 uF 10 Cap 0 0022 uF Fuse 4AM 250V 100Vac and 120Vac input Fuse 2AM 250V 220Vac and 230Vac input AC Line Module Fuseholder with cap Table 5 6 Relay Option 760 Part Number 5063 3434 0160 5422 0150 0081 2110 0671 1252 7643 0490 1405 0490 1670 0686 2215 0698 3439 0757 0284 0698 3439 0757 0284 0698 3439 1858 0047 50
62. bleshooting any circuit check the bias and or rail voltages to make sure that they are not the cause Table 3 3 lists the bias and rail voltage test points for the Al Main Control A2 Interface and the A3 Front Panel Display boards Unless otherwise noted all voltages are measured with respect to secondary common R473 3 with no load on the supply Table 3 3 Bias and Reference Voltages Test Point Common Measurement See Figure 6 1 Agilent Al TP 310 Output 38V 10 800 6632B 66332B EE Rail Agilent 66331 AI TP 310 73V 10 2 5V P P Rail Agilent 6634B AI TP 310 130V 10 2 2V P P 241 4 Rail Agilent Al TP 311 Output 9 8V 10 400mV P P 6632B 66332B Rail Agilent 6633B AI TP 311 10 2V 10 300mV P P Measured with respect to Output at nominal ac input line voltage Measured with reference to Interface Ground E306 black wire 38 Troubleshooting 3 J307 Voltage Measurements J307 connects the Al Main Board Assembly to the A2 Interface Assembly Table 3 4 provides a quick method of determining if the voltages between these assemblies are within the normal range If any of these voltages is outside the normal range refer to the flowcharts to further troubleshoot the circuit associated with the abnormal voltage Table 3 4 Voltage Measurements at J307 2 Interface to 1 Main board A1J307 Signal Name CV Mode CC Mode Pin Full V Voltage Full Scale Voltage oad ull L
63. cription Alternating current Both direct and alternating current Three phase alternating current Earth ground terminal Protective earth ground terminal Frame or chassis terminal Terminal is at earth potential Used for measurement and control circuits designed to be operated with one terminal at earth potential Terminal for Neutral conductor on permanently installed equipment Terminal for Line conductor on permanently installed equipment On supply Off supply Standby supply Units with this symbol are not completely disconnected from ac mains when this switch is off To completely disconnect the unit from ac mains either disconnect the power cord or have a qualified electrician install an external switch Out position of a bi stable push control N 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 withou
64. d if load is too noisy 24 ohm 100 W Agilent 66338 Ohmite RLS25R adjustable for CC PARD test 99 ohm 100 W Agilent 6634B Ohmite RLS100 adjustable 1k ohm 5 3W all models Agilent 0813 0001 Oscilloscope Sensitivity 1 mV Agilent 54504A or equivalent Bandwidth Limit 20 MHz Probe 1 1 with RF tip RMS Voltmeter True RMS Agilent 3400B or equivalent Bandwidth 20 MHz Sensitivity 100 uV Variable Voltage Adjustable to highest rated input voltage range Transformer Power 500 VA Measurement Techniques Test Setup Most tests are performed at the rear terminals of the supply as shown in Figure 2 1a Measure the dc voltage directly at the S and S terminals DVM Scope or resistor Ammeter 400 ohn RMS voltmeter for CV tests DVM or RMS voltmeter Current monitor for CC tests Electronic DC resistor Load Ammeter 1k ohm see note Note Use dc supply with same polarity connections for CC tests External a Replace load with appropriate 4 resistor for CC noise test DC supply Figure 2 1 Test Setup 12 Verification and Performance Tests 2 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 should 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
65. drivers 7 mm for GPIB connector 3 16 for RS 232 connector 1 4 for front panel binding posts d Long nose pliers e Antistatic wrist discharge strap 43 3 Troubleshooting Cover Removal and Replacement a Using a 2TP Pozi screwdriver unscrew the two screws that hold the carrying straps to the power supply and then remove the two screws from the opposite side of the case To remove the cover first spread the bottom rear of the cover slightly and push from the front panel Slide the cover backward until it clears the rear of the power supply A2 Interface Board Removal and Replacement To remove the Interface Board proceed as follows a b Remove the cover of the power supply described under Cover Removal and Replacement Remove the two 7 mm and 3 16 inch hex screws that hold the GPIB and RS 232 connectors in place Unplug the cable from J206 Depress the release button located at the end of the connector where the wires enter the housing Unplug the flat cables Note the position of the conductive side for reinstallation Connectors release the cable by pulling out end tabs as shown by the arrows in the following figure Lift the board off of the snap in standoffs To reinstall the Interface board perform the above steps in reverse order Front Panel Assembly Removal and Replacement This procedure removes the front panel assembly from the dc power supply a b 44 Re
66. e Interface board is replaced the supply must be reinitialized and calibrated To initialize the power supply a Enable the Calibration mode b Simultaneously depress the 0 and 9 keys c Using the Up Down arrows select the appropriate model number d Press Enter The dc power supply will go through the turn on self test sequence It is now re initialized and must be calibrated See Appendix A of the User s Guide for the calibration procedure ROM Upgrade Identifying the Firmware You can use the query to identify the revision of the supply s firmware The query will readback the revisions of the Primary Interface ROM located on the A2 Interface board The manufacturer and model number of the supply are also returned The following 1s 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 a 0 and then the firmware revision Example AGILENT TECHNOLOGIES 66332A 0 A 00 01 The revision level of the ROM can also be found on the label affixed to the physical IC chip itself Upgrade Procedure If the Interface board ROM is upgraded you can re initialize the supply without affecting the calibration a Enable the Calibration mode b Simultaneously depress the 0 and 9 keys EEINIT lt model gt will be displayed c Using the Up Down annunciator keys select ROMUPD model d Using the Up Down arrows
67. e fuse is installed and all safety precautions see following warnings are taken In addition note the instrument s external markings described under Safety Symbols GROUND THE INSTRUMENT 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 Any interruption of the protective grounding conductor or disconnection of the protective earth terminal will cause a potential shock hazard that could result in personal injury FUSES 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 KEEP AWAY FROM LIVE CIRCUITS Operating personnel must not remove instrument covers Component replacement and internal adjustments must be made by qualified service personnel Do not replace components with power cable connected Under certain conditions dangerous voltages may exist even with the power cable removed To avoid injuries always disconnect power discharge circuits and remove external voltage sources before touching components DO NOT SERVIC
68. he Safety Summary page at the beginning of this manual for general safety information Before operation or repair check the dc power supply and review this manual for safety warnings and instructions Safety warnings for specific procedures are located at appropriate places in the manual Related Documents The following documents are shipped with your dc power supply a User s Guide containing installation operating and calibration information Programming Guide containing detailed GPIB programming information 1 Introduction Revisions Manual Revisions If changes have been made to your power supply since the publication of this manual a yellow Manual Change sheet may be supplied with the manual It defines the differences between your power supply and the unit described in this manual The yellow change sheet may also contain information for correcting errors in the manual Note that because not all changes to the product require changes to the manual there may be no update information required for your power supply Firmware Revisions You can obtain the firmware revision number by either reading the integrated circuit label or query the dc power supply using the GPIB IDN query command See Chapter 3 ROM Upgrade Electrostatic Discharge CAUTION The de power supply has components that be damaged by ESD electrostatic discharge Failure to observe standard antistatic practices can result in serious degr
69. icroprocessor all digital circuits analog to digital converters ADC and digital to analog converters DAC in the dc power supply are located on the A2 Interface board control signals between the A2 interface board and the A1 main board are either analog or level signals Primary Interface The primary microprocessor circuits DSP ROM and RAM chips decode and execute all instructions and control all data transfers between the controller and the secondary interface The primary microprocessor circuits also processes measurement and status data received from the secondary interface A Dual Asynchronous Control chip on the A2 board converts the RS 232 RI DFI and front panel data into the primary microprocessor s 8 bit data format The serial data is transferred between the primary interface and the secondary interface via a serial bus and optical isolator chips These chips isolate the primary interface circuits referenced to earth ground from the secondary interface circuits Secondary Interface The secondary interface circuits include a programmed logic array EEPROM boot ROM 8 and 12 bit DAC circuits and 8 and 16 bit ADC circuits The programmed logic array translates the serial data received from the primary interface into a corresponding digital signal for the appropriate DAC ADC circuits The logic array 18 also connected directly to four DAC ADC circuits Under control of the logic array the selected DAC converts the data on
70. l All All All All All 66332A 6632B Part Number 1901 1130 5060 3378 1205 0282 1901 1383 1901 1130 1901 1098 1901 0731 1901 0050 1901 0719 1901 1080 1901 1098 1901 1080 1901 1098 1901 1098 1901 0050 1901 0033 1901 0050 1901 0033 1901 0050 1901 0033 1901 0987 1902 0953 1901 0880 1901 0719 1902 0960 1901 0987 2110 0712 2110 0697 2110 0685 2110 0697 2110 0685 2110 0699 2110 0777 0811 3776 2110 1107 Not Used Not Used 1252 0063 1251 6832 1252 0063 1252 5977 0360 2609 1252 0056 1252 0063 1252 3771 9140 0115 Qty NOR i Fa Ch EA N i EA ra EA ra EA ke END py Replaceable Parts 5 Description Diode Rectifier Assembly ref D311 Heat Sink ref D311 Power Diode Diode Diode Diode Diode Power Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Power Diode See CR342 Zener Diode 6 2V 5 Diode Diode Power Zener Diode 12V 5 Power Diode See Q314 Fuse Submin 4AM 125V Fuse Submin 15 32V Fuse Submin 7AM 125V Fuse Submin 15 32V Fuse Submin 7AM 125V Fuse Submin 5AM 125V Fuse 8AM 32V Res Fusible 0 5 Ohm 5W ref F305 Fuseholder Clips Replaced by track on all models Replaced by track on all models Connector Connector Connector Connector Barrier Block Connector Connector AC Line Module Coil 22 uH 10 61 5 Replaceable
71. lt in self tests before calibration or any of the verification or performance tests can be performed If the supply fails any of the tests or if abnormal test results are obtained refer to the troubleshooting procedures in Chapter 3 The troubleshooting procedures will determine if repair and or calibration is required Test Equipment Required Table 2 1 lists the equipment required to perform the verification and performance tests A test record sheet with specification limits when test using the recommended test equipment may be found at the back of this section WARNING SHOCK HAZARD These tests should only be performed by qualified personnel During the performance of these tests hazardous voltages may be present at the output of the supply Table 2 1 Test Equipment Required for Verification and Performance Tests Recommended Mode Current Monitor 15 A 0 1 ohm 0 04 Guildline 9230 15 Resistor for power supplies up to 15 A output DC Power Suppl 5V 10A Agilent 6642A 6653A Digital Voltmeter Resolution 10 nV 1V Agilent 3458A or equivalent Readout 8 1 2 digits Accuracy 20 ppm Electronic Load 20 5 A minimum with transient capability Agilent 6060B or equivalent GPIB Controller HP Series 300 or other controller with full GPIB capabilities 11 2 Verification and Performance Tests Resistor 1 ohm 50 W Ohmite L50J1RO substitute for electronic 3 ohm 100 W Agilent 66332A 6632B Ohmite RLSSRO adjustable loa
72. mV 20mV Vout 6mV 50 045 V Vout 21 mV PARD Ripple and Noise Peak to Peak RMS Transient Response 3mV 0 5 mV Vout 50 mV now Voltage in 100 us Vout 50 mV Constant Current Tests Current Programming and Readback High Range CC Programming Accuracy 0A 153mA Current Readback Accuracy 20mA High Range Iout 029 mA CC Programming Full Scale 1 998 A Current Readback Accuracy Full Scale Tout 4 25 mA 4 25 mA Current Sink Readback Isink 4 85mA Isink 4 85mA Lucie 20 mA Range Current Readback Readback Accuracy 0 A 2 5 2 5 Readback Accuracy 20 mA Tout 22 5 pA Tout 22 5 pA Readback Accuracy 20 mA Tout 22 5 uA Tout 22 5 pA 1 53 mA 0 29 2 002 PARD Ripple Noise 2 0 mA Load Effect 10 Enter your test results in this column 0 25 mA 21 2 Verification and Performance Tests Model Agilent 6634B 2 0 port No Test Description Minimum Dae ECH Maximum Specs Specs Constant Voltage Tests Voltage Programming and Readback Low Voltage OV Vout 50 mV 50 mV Front Panel Display Readback Vout 12 mV Vout 12 mV High Voltage Full Scale Vout 99 9 V 100 1 V Front Panel Display Readback Vout 42 mV Vout 42 mV Load Effect ose v Source Effect ocimv PARD Ripple and Noise ANN E 0 6 mV mu hebes Voltage in 100
73. ming and Readback Low Voltage OV Vout Front Panel Display Readback Vout 3 mV High Voltage Full Scale Vout 19 980 V Front Panel Display Readback Vout 9 mV Vout 3 mV 20 020 V Vout 9 mV BE PARD Ripple and Noise Peak to Peak 3mV 0 3mV Load Effect 2 je Vout 20 mV Voltage in 100 us Vout 20 mV Constant Current Tests Current Programming and Readback High Range CC Programming Accuracy 0A 3 32mA Current Readback Accuracy 20mA High Range Tout 0 54 mA CC Programming Full Scale 4 9955 A Current Readback Accuracy Full Scale Tout 10 5 mA Tout 10 5 mA Current Sink Readback Isink 11 1mA Isink 11 1mA ux 20 mA Range Current Readback Readback Accuracy 0 A 2 5 2 5 Readback Accuracy 20 mA Tout 22 5 pA Tout 22 5 pA Readback Accuracy 20 Tout 22 5 pA Tout 22 5 pA pu pues 3 32 mA 0 54 5 0045 PARD Ripple and Noise 2 0 mA Load Effect Enter your test results in this column 20 Verification and Performance Tests 2 Model Agilent 6633B iReport No Test Description Minimum Results Maximum Specs Specs Constant Voltage Tests Voltage Programming and Readback Low Voltage OV Vout 20 mV Front Panel Display Readback Vout 6 mV High Voltage Full Scale Vout 49 955 V Front Panel Display Readback Vout 21 mV Load Effect 4
74. move the Power Supply Cover described earlier in Cover Removal and Replacement Disconnect the cable between the Front Panel board and the Interface board at the Interface board Carefully peel off the vinyl trim strips on each side of the front panel that cover the front panel screws Using a Torx T10 driver remove the two screws one on each side that hold the front panel assembly to the chassis Slide the Front Panel assembly forward and away from the chassis to access the 51 power switch Disconnect the wires going to the 51 switch assembly For reassembly make a note of the color coding of the wires and the pins to which they are connected If the supply has front panel binding posts unplug the cable from the binding post connector and use a Torx T15 driver to remove the screw connecting the ground wire to the chassis You can now remove the front panel assembly from the supply To reinstall the Front Panel Assembly perform the above steps in reverse order Troubleshooting 3 1 Line Switch Removal and Replacement a First remove the front panel assembly as described under Front Panel Assembly Removal and Replacement b Release the switch from the front panel by pressing the locking tabs inward against the body of the switch and pushing the switch out of its opening NOTE When reinstalling the switch make sure that the letter O is facing up when the switch is installed in its opening A3 Front
75. nd current The Fuse signal informs the logic array 1f the output fuse F300 is open A1 Main Board Circuits Power Circuits As shown in Figure 4 2 the power circuits consist of input power rectifiers and filter current monitoring resistors an output stage a voltage gain stage an overvoltage SCR and an output filter The ac input rectifier and filter converts ac input to a dc level The output stage regulates this dc level at the output of the power supply The output stage has up to four parallel NPN transistors mounted on a heatsink and connected between the Rail and the Output These transistors are driven to conduct by a positive going signal from driver Q303 located in the voltage gain stage The output stage also has up to four parallel PNP transistors mounted on a heatsink and connected between the Rail and the Rail These transistors are driven to conduct by a negative going signal from driver Q304 located in the voltage gain stage The voltage gain stage 15 controlled by a signal from the control circuits A positive going signal to the voltage gain stage makes the output more positive A negative going signal to the voltage gain stage makes the output more negative The Turn on control signal to the voltage gain stage simply keeps the output of the unit turned off for about 100 milliseconds at power turn on while the microprocessor is initializing the unit 50 Principles of Operation 4 joejes T uou
76. notified of the OV condition OV_Detect is low in order to program the output off turn off the gain stage bias and update the status of the unit 3 When a output protection clear command is executed the microprocessor circuits resets the OV circuits turns on the gain stage bias and programs the output to its previous level The fan driver control circuit provides the DC voltage to operate the cooling fan The Fan_Prog signal from the secondary interface circuit varies this voltage according to the ambient and heatsink temperature as well as the output voltage and current of the supply 53 Replaceable Parts List Introduction This section lists the replaceable parts for Agilent Models 66332A 6632B 6633B and 6634B power supplies Refer to Figures 5 1 for the location of mechanical parts with the reference designators MP Refer to the board location diagrams in Chapter 6 for the location of electrical parts Designator Al Al Al A2 A2 A3 A4 A4 5 6 51 WI W2 W3 WA WS W6 W7 W10 WII WIS Model 66332 6632 6633 6634 66332 6632 6633 6634 6633B 6634B 66332A 6632B All All All 66332A 6632B 6633B 6634B All All All All All All All All All All All All All All All All All All All All Table 5 1 Chassis Electrical Qty Part_Number 5063 3431 06633 61023 06634 61023 5063 3439 5063 3429 5063 3432 5063 3406 0661
77. oad 6 sw 7 RANGE SELECT High s __ os NEG COMP _ os TRIM NEG SCP og lo Jon commn __ Pe lee IE E EE lt 1 E E EUN las HE e NEN UN Pras i IMON L IMON 20mA 39 3 Troubleshooting Manual Fan Speed Control Under some circumstances such as testing acoustical devices where the fan noise would interfere with the test it would be advantageous to reduce the fan speed If the test requires a very light load the ambient temperature is low and the duration of the test 15 short the fan speed may be temporarily reduced The turn on default is Automatic so this procedure must be performed as needed every time the line voltage is turned on To manually control the fan speed Simultaneously depress the 0 and 9 keys EEINIT lt model gt will be displayed Using the Up Down annunciator keys select FAN MODE lt AUTO gt Using the Up Down arrows select FAN MODE lt MAN gt Press Enter Simultaneously depress the 0 and 9 keys lt model gt will be displayed Using the Up Down annunciator keys select FAN SPEED lt data gt Press Enter Number Enter the desired speed numeric entry range is 0 to 100 Press Enter Disabling Protection Features Except for overvoltage protection the power
78. on describes the different functional circuits used in the dc power supply models covered in this manual First the I O external signals that connect to the Agilent power supply are described Next the overall block diagrams for the dc power supply are described in detail The simplified block diagrams in this section show the major circuits on the dc power supply as well as the signals between circuits They also show the reference designations of some of the components in the functional circuit These same reference designators are shown in the schematic diagrams in Section 6 I O Interface Signals Table 4 1 describes the interface signals between the power supply and the end user or other external circuits and devices Table 4 1 Power Supply Interface signals Front panel outputs OUT Positive DC output voltage OUT Negative DC voltage or return Rear panel OUT Positive DC output voltage output sense screw OUT Negative DC voltage or return terminals sense OUT sensing terminal sense OUT sensing terminal common connected to ground conductor INH FLT connector FLT INH mode Digital I O mode FLT output OUT 0 FLT Common OUT 1 INH Input IN 2 OUT 2 INH Common Common as shipped configuration RS 232 connector XON XOFF uses ASCII control codes DC and DC1 RTS CTS uses Request To Send and Clear To Send lines DTR DSR uses Data Terminal Ready and Data Set Ready lines NONE there is no flow control GPIB connector GPIB IEEE
79. on pages 5 and 10 Information has been corrected on page 16 and pages 20 22 to comply with ISO 17025 8 15 03 Information has been corrected on page 16 and pages 20 22 to comply with ISO 17025 10 2 03 The ripple and noise specification limits have changed for Model 6634B on page 22
80. ondary interface to indicate that the corresponding mode is in effect When the CV loop is in control diode D328 is conducting current Voltage regulation is accomplished by comparing the programmed voltage signal CV Prog with the output voltage monitor signal Vmon The Vmon signal is in the 0 to 5 V range which corresponds to the zero to full scale output voltage range of the supply If the output voltage exceeds the programmed voltage Vmon goes high and produces a more negative going CV signal which reduces the input to the voltage gain stage and lowers the output voltage Conversely if the output voltage is less than the programmed voltage Vmon goes low and produces a more positive going CV signal which increases the input to the voltage gain stage and raises 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 unit starts sinking current to reduce the output voltage When the CC loop is in control diode D325 is conducting current Current regulation is accomplished by comparing the programmed current signal Prog with the output current monitor signal The Imon signal is produced by measuring the voltage drop across the current monitoring resistor and is in the 0 to 5
81. overvoltage setting OV Prog current measurement range select Range Select and fan speed programming Fan Prog The OS Trim Neg signal allows the negative current control circuit to be calibrated at zero The OV Prog signal 15 applied to the OV detect circuit which compares the programmed overvoltage setting with the actual output voltage The Range Select signal selects either the high or the low 20mA measurement range The Fan Prog 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 16 bit ADC in conjunction with a 4x1 multiplexer returns data from the following measurement signals to the logic array monitored output voltage VMon monitored high range current Imon H monitored low range current Imon L and monitored peak current Imon P All measurement signals are in the range of 0 to 5V which corresponds to the zero to full scale readback capability of the dc power supply The 8 channel 8 bit ADC returns the following signals to the logic array high range output current Imon H high range negative current Imon H overvoltage V Mon ambient temperature Temp Amb heatsink temperature HS and output fuse state Fuse Five of these signals are for fan control The logic array varies the Fan Prog signal depending upon the ambient temperature the heatsink temperature and the present output voltage a
82. put should now go high and not trip the OV Is the CV annunciator on 2 Yes Measure voltage at the base of Q303 with respect to its emitter Voltage lt 0 6V Yes Troubleshoot Output Stage No gt V_mon should be approximately 6632B or 66332A 4 25 6633B Vout 10 52 6634B Vout 21 Vmon U315B 7 OK Check Voltage Monitor Amplifier 0315 circuit 2 Interface Board Check Voltage Control U315A circuit Troubleshoot Voltage Gain Stage Figure 3 1 Sheet 12 High Output Voltage 36 Troubleshooting 3 Specific Troubleshooting Procedures Power on Self test Failures The power on self test sequence tests most of the digital and DAC circuits If the supply fails self test the display ERR annunciator will come on You can then query the unit to find out what the error s are When an error is detected the output is not disabled so you can still attempt to program the supply to help troubleshoot the unit Table 3 2 lists the self test errors and gives the probable cause for each error NOTE A partial self test is performed when the TST query is executed Those tests that interfere with 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 powe
83. r supply will continue normal operation if TST returns a non zero value Table 3 2 Self Test Error Codes Messages Ell 12 bit DAC test failed 0 is written to DAC U241A and B A2 Interface Bd ADC 10242 is checked for 133 7 counts E12 12 bit DAC test failed 4095 is written to DAC U241A A2 Interface Bd and 0 to ADC 0242 is checked for 71 7 counts E13 12 bit DAC test failed 0 is written to DAC U241A and 2 Interface Bd 4095 to ADC 0242 is checked for 71 7 counts E14 12 bit DAC test failed 4095 is written to DAC U241A A2 Interface Bd and B 10242 is checked for 10 7 counts E15 8 bit DAC test failed 10 and 240 are written to DAC A2 Interface Bd U244 0242 is checked for 10 and 240 7 counts E80 Dig 1 test failed SEC PCLR written low and high A2 Interface Bd read back through Xilinx E213 RS 232 input buffer overrun A2 Interface Bd E216 RS 232 framing error A2 Interface Bd E217 RS 232 parity error A2 Interface Bd E218 RS 232 UART input overrun A2 Interface Bd E220 Front Panel comm UART input overrun A3 Front Panel Display Bd E221 Front Panel comm UART framing error A3 Front Panel Display Bd E222 Front Panel comm UART parity error A3 Front Panel Display Bd E223 Front Panel firmware input buffer overrun A3 Front Panel Display Bd 97 3 Troubleshooting CV CC Status Annunciators Troubleshooting The CV CC annunciators are particularly helpful when troubleshooting a unit with no output If the
84. r test and program the output voltage to zero and full scale output current The current on the UUT display should be approximately 0 mA Record the current reading on the DMM and the reading on the front panel display The difference between the two readings should be within the limits specified in the performance test record chart under 20mA RANGE CURRENT READBACK ACCURACY Q 0A Program the output voltage to 20V and record the current reading on the DMM and the reading on the front panel display The difference between the readings should be within the limits specified in the performance test record chart for the appropriate model under 20mA RANGE CURRENT READBACK ACCURACY 20mA Turn off the supply and connect the output and an external supply as shown in Figure 2 1c Set the DMM to operate in current mode Turn on the external supply and program it to 20 V and 1 amp Then program the supply under test to zero volts and 1 amp The UUT display should read approximately 20 mA Record the current reading on the DMM and the reading on the front panel display The difference between the two readings should be within the limits specified in the performance test record chart under 20 RANGE CURRENT READBACK ACCURACY 20 mA 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 measu
85. range RmLo R403 monitors the low current range Shunt clamps connected in parallel across RmLo turn on at approximately 25 mA to limit the voltage drop at high currents The Range Select signal sets the level at which switching occurs The output of the current monitor drives the level 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 crowbar control circuit described in the next section The output filter capacitor provides additional filtering of the dc output Control Circuits As shown in Figure 4 2 the control circuits consist of the CV CC controls output voltage current monitor bias supplies and SCR control The CV CC control circuits provide a CV control loop a positive CC control loop and a negative 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 The negative CC control circuit is activated when a current source such as another power supply is connected across the output terminals and its voltage is greater than the programmed voltage A low level CV Detect Detect or Detect signal is returned to the sec
86. ration 4 The output is programmed off An overvoltage condition is detected OV_Detect signal is received The line voltage falls below 90 volts approximately Current readback is provided by three separate circuits The previously discussed high range current signal Imon_H returns the high range current measurement When the unit is operating in the low current readback mode a separate low range current shunt and amplifier provides low current readback via the Imon_L signal The Range Select signal drives shunt clamps Q304 and Q305 which clamp the voltage across RmLo to approximately 1 8 V A third current readback circuit is available on the Agilent 66332A unit It consists of a high bandwidth current amplifier that returns dynamic current measurements from the output filter capacitor via the Imon_P signal Note that the Imon_H and the Imon_P signal are combined to return the actual output current measurement An overvoltage detect circuit compares the output voltage to the programmed overvoltage setting When the output exceeds the programmed setting the OV_Detect signal goes low which informs the logic array that an OV condition has occurred The crowbar control circuit is enabled when the ON SCR signal is received When overvoltage condition occurs the SCR control circuit generates the OV signal which causes the following actions to occur 1 The SCR fires shorting the supply s output 2 The microprocessor circuits are
87. rd removal 44 A2 Interface Board 48 25201 50 board removal 45 Front Panel 48 ADC 48 B bias voltages 38 39 C cal denied 41 calibration 41 calibration post repair 41 CC 38 CC line regulation 17 CC load effect 18 CC load regulation 17 CC loop 52 CC noise 19 CC operation 17 CC source effect 18 CC_Detect 48 52 CC_Prog 50 52 clear password 41 component locations A1 71 72 73 74 A4 76 constant current tests 16 constant voltage tests 14 Control 50 52 copyrights 5 cover removal 44 current monitoring resistor 13 current sink 17 CV 38 CV load effect 14 CV loop 52 CV Noise 15 CV source effect 15 CV CC control 50 52 CV_Detect 48 52 CV_Prog 50 52 p DAC 48 disable protection 40 disassembly tools 43 disassembly procedure 43 downprogramming 50 52 DP Control 50 _ E EEPROM 50 electronic load 13 electrostatic discharge 10 error codes 37 _ 09 50 fan speed 40 Fan_Prog 50 52 firmware revisions 10 42 FLT 47 front panel removal 44 45 Fuse 50 GPIB 47 hazardous voltages 9 history 5 HS_Therm 50 LL identification 5 IDN query 42 Imon H 50 IMon H 52 Imon L 50 Imon P 50 INH 47 inhibit calibration 41 initialization 42 interface signals 47 81 Index SN 4307 voltages 39 line voltage wiring 46
88. rement of the ac peaks of the output current ripple several dc measurements should be made and the average of these readings 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 follows a b Program 10 power line cycles per sample by pressing NPLC 1 0 ENTER Program 100 samples per trigger by pressing N Rdgs Trig 1 00 ENTER 17 2 Verification and Performance Tests c Setup voltmeter to take measurements in the statistical mode as follows Press Shift key 10 Shift key Press up arrow until MATH function is selected then press gt Press up arrow until STAT function is selected then press ENTER d Setup voltmeter to read the average of the measurements as follows Press Shift key fl Shift key Press down arrow until RMATH function 15 selected then press gt Press up arrow until MEAN function is selected then press ENTER e Execute the program by pressing f0 ENTER TRIG ENTER f Wait for 100 readings and then read the average measurement by pressing fl ENTER To repeat the measurement perform steps e and f CC Load Effect This test measures the change in output current for a change in load from full scale output voltage to short circuit a Turn off supply and connect the output as shown in Figure 2 1a with the DVM connected across the curren
89. s should be as short as possible to reduce noise pick up An electronic load may contribute ripple to the measurement so if the RMS noise is above the specification a resistive load may have to be substituted for this test b Check the test setup for noise with the supply turned off Other equipment e g computers DVMs etc may affect the reading c the supply and program the current to full scale and the output voltage to the maximum programmable value d 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 monitor resistor to obtain rms current It should not exceed the values listed in the performance test record card under CC NOISE RMS Performance Test Equipment Form Test Facility Report Number Date Customer Tested By Model Ambient Temperature C Serial No Relative Humidity 96 Options Nominal Line Frequency Firmware Revision Special Notes Test Equipment Used Description Model No Trace No Cal Due Date AC Source DC Voltmeter RMS Voltmeter Oscilloscope Electronic Load Current Shunt 19 2 Verification and Performance Tests Performance Test Record Forms Model Agilent 66332A OR Agilent6632B Reporta Test Description Minimum Results Maximum Specs Specs Constant Voltage Tests Voltage Program
90. select the appropriate model number e Press Enter The supply will go through the turn on self test sequence and return to the power supply metering mode 42 Troubleshooting 3 Disassembly Procedures The following paragraphs provide instructions on how to disassemble various components of the dc power supply Once disassembled the components can be reassembled by performing the disassembly instructions in reverse order Figure 3 2 shows the location of the major components of the unit AG Board Ai Control Board Optiona M Input Filter Board N e H A2 Interface Board p d MEA T1 Main Transformer ge E AAA SE EEE CO ECO EI CHG EJ 6 v COOC 4 caeauuacdgdcd N 4 Bindirg Post Goard Front Panel Display Figure 3 2 Component Location WARNING SHOCK HAZARD To avoid the possibility of personal injury turn off AC power and disconnect the line cord before removing the top cover Disconnect the GPIB cable 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 List of Required Tools Pozidriv screwdrivers b 110 and T15 Torx screwdrivers c Hex
91. sformer bracket to the bottom of the chassis and the two Torx T10 screws securing the front of the transformer to the chassis b Uselong nose pliers to disconnect all wires going to the transformer terminals c Liftthe transformer out of the chassis NOTE The AC power connections at the transformer primary are line voltage dependent Refer to Figure 3 3 subsequent reconnection 45 3 Troubleshooting Line Voltage Wiring Figure 3 3 illustrates the primary wiring configuration of the power transformer for various ac line voltages Use long nose pliers to disconnect the wires going to the transformer terminals NOTE white red grey white red grey 46 Install the correct fuse when changing the ac line voltage from a previous setting for 110 120 Vac 4 AM Agilent p n 2110 0055 for 220 230 Vac 2 AM Agilent p n 2110 0002 grey Side of transformer 120 white red grey Front of unit grey white red grey Front of unit lt Side of e transformer 100 VAC white blue PNE white grey yellow grey white red blue white red grey Side of transformer 220 VAC grey Side of transformer 230 240 VAC orange white green Front of unit BIAS WIRING for all voltages Figure 3 3 Transformer Wiring Front of unit Front of unit Principles of Operation Introduction This secti
92. sistance 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 card 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 1a except connect a dc power supply in place of the electronic load as indicated Connect the DMM across the current shunt Set the external power supply to 5 V and the current limit approximately 2046 above the full scale current rating of the supply under test Turn on the supply under test and program the output voltage to zero and full scale output current The current on the UUT display should be approximately full scale current negative 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 chart under CURRENT SINK READBACK Low Range Current Readback Accuracy This test verifies the readback accuracy of the 20 milliampere current range a b Turn off the supply and connect the output as shown in Figure 2 1b Set the DMM to operate in current mode Turn on the supply unde
93. st record chart 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 chart for the appropriate model under CV NOISE PARD 15 2 Verification and Performance Tests 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 Loading Transient Unloading Transient Figure 2 2 Transient Waveform a Turn off the supply and connect the output as in Figure 2 1a with the oscilloscope across the S and the 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 c Setthe load to the Constant Current mode and program the load current to 1 2 the power supply full scale rated current d Setthe 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 generator on f Adjustthe oscilloscope for a waveform similar to that in Figure 2 2 6 Theoutput voltage should return to within the specified voltage v in less than the specified time t Check both loading and unloading transients by triggering on the positive and negative slope Con
94. stant 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 a Turn off the supply and connect the current monitoring resistor across the power supply output and the DVM across the resistor as shown in Figure 2 1a See Current Monitoring Resistor for connection information b Turn the supply and program the output voltage to 5 V and the current to zero c Divide the voltage drop DVM reading across the current monitoring resistor by its resistance to convert to amps and record this value Iout The reading should be within the limits specified in the performance test record card for the appropriate model under CC PROGRAMMING 0 AMPS d Set the current readback range to High and program the output current to 20mA For model 663324 set the current detect mode to DC Repeat step C to get the Iout Record the current reading on the front panel display The reading should be within the limits specified in the performance test record card for the appropriate model under Current Readback Accuracy 20mA High Range 16 Verification and Performance Tests 2 Program the output current to full scale Divide the voltage drop DVM reading across the current monitoring resistor by its re
95. supply s protection features may be disabled This is not recommended as a normal operating condition but is helpful under some circumstances such as troubleshooting The turn on default is NO PROTECT OFF protection enabled so this procedure must be performed as needed every time the line voltage is turned on To disable the protection a Simultaneously depress the 0 9 keys EEINIT lt model gt will be displayed b Using the Up Down annunciator keys select NO PROTECT OFF c Using the Up Down arrows select NO PROTECT lt ON gt d Press Enter 40 Troubleshooting 3 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 B of the User s Guide a Al Control Board Voltage or Current Monitor Amplifier circuits High Bandwidth Current Amplifier or Current Monitor resistors R403 R473 b 2 Interface Board If the Interface board A2 is replaced the supply must be initialized first see Initialization later in this chapter and then be calibrated Inhibit Calibration Switch If CAL DENIED appears on the display when calibration is attempted or if error code 401 occurs when calibrating over the GPIB the internal INHIBIT CAL switch has been set This switch setting prevents unauthorized or inadvertent power supply calibration You must reset
96. t monitoring resistor b Turnon the supply and program the current to the full scale current value and the output voltage to the maximum programmable voltage value c Adjust the load in the CV mode for full scale voltage as indicated on the front panel display Check that the CC annunciator of the UUT is on If it is not adjust the load so that the output voltage drops slightly d Record the output current reading DVM reading current monitor resistance value in ohms You may want to use the average reading program described under CC Load and Line Regulation 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 chart for the appropriate model under CC LOAD EFFECT 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 offthe supply and connect the ac power line through a variable voltage transformer b Connect the output terminals as shown in Figure 2 1a with the DVM connected across the current monitoring resistor Set the transformer to the nominal line voltage c Turnonthe supply and program the current to the full scale value and the output voltage to the maximum programmable value d Adjust the load in the CV mode for full scale voltage
97. t the prior written consent of Agilent Technologies Inc Copyright 1997 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 are identified by a new printing date A revised edition incorporates all new or corrected material since the previous printing date Changes to the manual occurring between revisions are covered by change sheets shipped with the manual In some cases the manual change applies only to specific instruments Instructions provided on the change sheet will indicate if a particular change applies only to certain instruments Edition June 1997 Editions d eegen tah eee September 2000 Instrument Identification Agilent Technologies power supplies are identified by a 10 digit serial number The format is described as follows first two letters indicate the country of manufacture The next four digits are a code that identify either the date of manufacture or of a significant design change The last four digits are a sequential number assigned to each instrument Item Description US The first two letters indicates the country of manufacture where US USA MY Malaysia SG Singapore 3631 This is a code that identifies either the date of manufacture or the date of a significant design change 0101 last four digits are
98. test points listed in Chapter 6 The circuit locations of the test points are shown on the schematics and on the component location diagrams in Chapter 6 24 Turn unit and observe the display Unit should display all of the segments and annunciators the address and then after self test display either an error message or go to the metering mode A3J2 5 held low lt 5V A3J2 8 gt Yes Display comes Yes 7 Troubleshoot 1 2 5V Interface Bias Interf board circuit W6 or W7 Table 3 2 Go to Troubleshooting OV at Turn on Protect Annunciator On Yes sheet 4 No Check RI input 2 gt Interface board No Disable OCP and check for normal No Yes Operation No Yes Go to sheet 2 No Yes For check fan rol Replace internal circuit thermal fuse F300 sensor RT301 Figure 3 1 Sheet 1 Main Flowchart Troubleshooting 3 Replace A3 Front Panel Display board No Go to FS indicated but fuse is OK sheet 6 25 3 Troubleshooting 26 Continued from sheet 1 Program Voltage and Current full scale enable output with no load Measure Voltage at output terminals Display and measured Yes Y
99. the bus into an analog signal Conversely the selected ADC converts the analog signals from the A1 board into a digital signal The logic array also directly receives status information from the A1 main board via three level sensitive signal lines which inform the array of the following operating conditions constant voltage mode CV Detect constant current mode CC Detect negative current mode CCN Detect and overvoltage OV Detect The PM Inhibit control signal is used to shut down the bias voltage to the output stages and keep the power supply output off The OV SCR control signal is used to fire the SCR and keep the power supply output off when an overvoltage condition has occurred 48 Principles of Operation 4 quessy oo5j3u zv Ajquassy 10014 1 1 H H sng soeps ew ado sng 995 i 1 i I 1 1 wa SH ee 1019250000 4 1 i 2513 quy E i i USWA 1 1 H i 1 uej t ER t I joejeg i BAI Bold 1 i SO i H 1 1 1 1 i QUO 14 1 6288 i t feng t i 5014 7 8 i E 10 PRES EE S B 999
100. this switch in order to calibrate the supply This four section switch 5201 is located on the 2 Interface board near the GPIB connector The switch has 2 functions related to calibration One is Inhibit Calibration With this switch set the supply will not respond to calibration commands thus providing security against unauthorized calibration The other switch allows you to bypass the password in case it is forgotten 4321 1008 Nama om off Clear Off On Password Inhibit On Off Calibration Calibration Password In order to enter the calibration mode you must use the correct password as described in Appendix B of the Operating Manual As shipped from the factory the number 0 zero is the password If you use an incorrect password OUT OF RANGE will appear on the display for front panel calibration or error code 402 occurs for GPIB calibration and the calibration mode will not be enabled If you have changed the password and have forgotten it you can set the configuration switch on A2 Interface board to bypass the password See Calibration Switch paragraph above 41 3 Troubleshooting Initialization The dc power supply s GPIB address and model number as well as other constants which are required to program and calibrate the supply are stored in a EEPROM on the A2 Interface board The Interface board also contains references and other components that will affect the alignment of the supply If th
101. ting to troubleshoot the dc 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 dc power supply Troubleshooting procedures are provided to isolate a problem to one of the circuit boards or a particular circuit Figure 3 2 shows the location of the circuit boards and other major components of the unit If a problem has been isolated to the Al Control 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 calibrated See Post Repair Calibration later in this chapter If the A2 Interface Board is replaced the supply must be initialized before it is calibrated See Initialization later in this chapter Chapter 5 lists all of the replaceable parts for the power supplies Chapter 6 contains schematics test point measurements and component location diagrams to aid you in troubleshooting the supply 23 3 Troubleshooting Test Equipment Required Table 3 1 lists the test equipment required to troubleshoot the power supply
102. tput 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 and front panel display functions within specifications Note that the values read back over the GPIB should be identical to those displayed on the front panel a Turn off supply and connect a digital voltmeter between the S and the S terminals as shown in Figure 2 1a b Turn on the supply and program the supply to zero volts and the maximum programmable current 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 chart 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 d Program the output voltage to full scale 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 chart for the appropriate model under CV PROGRAMMING FULL SCALE 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 1a with the DVM connected between
103. uired Tools Cover Removal and Replacement A2 Interface Board Removal and Replacement Front Panel Assembly Removal and Replacement A3 Front Panel Board Removal and Replacement Al Main Control Board Power Transformer Removal and Replacement Line Voltage Wiring PRINCIPLES OF OPERATION Introduction Interface Signals A3 Front Panel Circuits A2 Interface Circuits Primary Interface Secondary Interface 1 Main Board Circuits Power Circuits Control Circuits REPLACEABLE PARTS LIST Introduction DIAGRAMS Introduction General Schematic Notes Backdating INDEX Introduction Organization This manual contains information for troubleshooting and repairing to the component level the Agilent Model 66332A Dynamic Measurement DC Source and the Agilent Model 6632B 6633B 6634B System DC Power Supplies Hereafter all models will be referred to as the dc power supply This manual is organized as follows Chapter 1 Organization Chapter 2 Performance tests Chapter 3 Troubleshooting procedures Chapter 4 Principles of operation on a block diagram level Chapter 5 Replaceable parts Chapter 6 Diagrams Safety Considerations WARNING Hazardous voltages exist within the dc power supply chassis This dc power supply is a Safety Class I instrument which means it has a protective earth terminal This terminal must be connected to earth ground through a power source equipped with a 3 wire ground receptacle Refer to t
104. unit has no output voltage or current and one of the annunciators is on then the problem is in the control circuit associated with that annunciator An example of how this might be useful would be in a case where the voltage and current are programmed to some positive value there is no output voltage and the CV annunciator is on This indicates that the problem is probably in the Voltage Amplifier circuit If the CC annunciator were on then the problem would likely be in the Current Amplifier If UNR is indicated then neither the voltage nor the current circuits are in control and the problem would be in circuits after the gating diodes such as the driver or output regulator stages When troubleshooting the CV CC status annunciators or the status readback circuits first measure the voltage drop across the gating diodes Al D328 CV and D325 CC A conducting diode indicates an active ON control circuit This forward drop is applied to the input of the associated status comparator U306A and D respectively and drives the output CV_DETECT or DETECT low low signal indicates an active status which is sent to the A2 board microprocessor The front panel CV annunciator indicates when the CV mode is active is low The front panel CC annunciator indicates when the CC mode is active DETECT is low The UNREGULATED UNR annunciator comes on when neither the CV nor CC is active Bias and Rail Voltages Before trou
105. us Vout 100 mV Vout 100 mV Constant Current Tests Current Programming and Readback High Range CC Programming Accuracy 0A 0 76 mA 0 76 mA Current Readback Accuracy 2 20mA High Range Tout 0 29 mA 0 29 mA CC Programming Full Scale 0 999 A 1 001 A Current Readback Accuracy Full Scale Iout 2 25 mA 2 25 mA Current Sink Readback Jak 285 mA sink 2 85 ma 20 mA Range Current Readback Readback Accuracy 0 A 2 5 2 5 Readback Accuracy 20 mA Tout 22 5 Tout 22 5 uA Readback Accuracy 20 mA Tout 22 5 22 5 uA PARD SAM Ripple and Noise 2 0 Load Effect 79 Source Effect 0 25 mA ee el 0 25 mA Enter your test results in this column 22 Troubleshooting Introduction WARNING 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 CAUTION This instrument uses components which can either be damaged or suffer serious performance 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 This chapter provides troubleshooting and repair information for the dc power supply Before attemp

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