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HP 6811A, 11B, 12A, 12B, 13A, 13B, 41A, 42A Service

Contents

1. Figure 6 18 Control Board Component Locations sheet 1 of 2
2. C613 s 5 5 8 B B B C615 lt BB BRRBRR BR B BB Sle s J Ss 3 3 El 2 i B E 2 ES ovo as 8 E608 on 8880 x e R666 8 pm we g 5558 Bes 8138 us Eu 5 B 58 588 Bas EI gB ER E E sid VS LN ui i in 1200 R650 1651 R649 R652 TO Ree Fi C604 SCH Rest Cam C608 ABS R688 Om SS ES EN ez Se a 8 88 SS E 88 4607 U609 ee K L d go Be 11011100 SS ab e e Bs PT HE nu R689 B B se
3. cho fo 1 a ch 1 I 068 HT O Loy A NER ZE 6684 2 006900 c Ou LE ner meso orem 5 0 O i 06 8 ES Se E 181 SE cies sap RA eoeta Hha Lnsros agu t 060618 B Eo dieu DR pto Ele C edil r g 5 I Ef p Eak SEHE 026810 E SOAM seel Adis E sesam oum sve D Os So E S55 1489 g olei 2269 nit zopa us 2 24815 oie ENDE RI cdta cde c zeam fit ries So Se SE a o So sumo Ebr e Mzs6 va g 28 5 E Qc ES 0600 SE 5065 982 keen Se mmseo M LO teen HL m Bold HS 8968 1968 19884 SSBI3 I 0 1 1 GE GH 0968 E dB Set d ES I c 5 996 5 i g ces 5 51879 z Ove yo lees eased 005965 8 D Di m a chs
4. P C1824 11 SOR FRULT I PERK PROG 12 2 SHT4 e RAIL_L_FAULT U_RMS_PROG Se n 13 5 DIODE R PCLR SHT2 uFDC MODU FE e RERDBRCK CL_RMS WFDC_OFFSET 55 E CIRCUIT U99 564440 BUE FAULT WFAC_MODU 5 5 ee SHTS ANM CU LEUELING MON LO 10K I_L_MON SH DIGITRL CL_PEAK U_MON SHT1 2 7 e RERLTIME ANALOG 5 J822 Im RRIL H FRULT i Sto e 4 57 0 RAIL LO_WARN NC WFAC_PROG 51 0 o5 7 5 5 150 Tz LEU FRULT SHT1 WFDC PROG ole Hio R1805 157 0 SHT2 5 11 9 Nor 1 151 0 REG FAULT V is 9 14 R903 WH DG444DY o 19 9 m SHTS I RMS PROG wi NC 15 16 511 6 19U 8 21 o IPCL TEST m 12 l9 R904 REF 594 521 0 SHT4 SHT2 19 50 es PROT CLERR 06 o 22 SE IMON 10X 521 0 9 124 55 OUT RELRY 2 Dot REF 25 26 31 mE TRIM 28 29 30 50 3 150 SHT1 om ER 32 d 1 R1804 PCLR I_MON_RMS 12 el NOT A 35 54 U998 5U SHT2 NC LORDED SUB_A1 HS_MON 4 SHTS 0981 15 5 005 DOWN C999 150 T 0 047 4 Tun DAC PROG FAN AMP Sou 10544407 ET SHT1 7 FAN_PROG 5980 y 2R_DAC_PROG SHT1 7 L 2 IMON 10x SUB os 4 a TLO72A 982 SUB R0 TRIM RESET sHT1 ee PROG 0 042 S
5. R2746 SUREF 10 C792 C794 1000PF ES SUREF UDD UREFA 500 BXD 0 7 0770 12DAC3 i222 28 Thi SHT 5 6 7 8 p gt 07857 5 4 20 gt 24 _ DUAL 12 BIT 2 9772 gt NVV 1 25 en DAC 206 om VREFA 12DAC4 12UDSP 75 ere See 24 err BXDC4 501085 eurn BxD 1 es DBO pac 084 081 2 12DAC4_A i 8x05 19 GND BXD 2 55 RFB BxDc6 18 DBS 21 52 086 DB OUT A BXD 7 12 gt ove 8xpc4 Bil A 5 _ L lces A GND ED OUT B Bxbce 8 SHT 6 1205 5 15155 B ople BXD 7 12 SHT 5 WR Aal 16 Pi e 12DRC4 B _ x alt ra DEND USS UREFB Vas 500 12UDSP ii I gt 10 Hf 16 S 45 4 AL 167063 ds DGND USS UREFB 12LDAC 11 7 10 SHT 4 5 A_SENZ 12DAC4_WR SHT 5 2712 2713 SUREF 4725 16ADC4 MSBT TT 16ADC3 EENS SHT 5 6 AL1 l 10 4 A_SEN4 c 20 500 R2748 16ADC4 o A_SEN4 TE E NNV 16ADC5 Kc A_SENS 185555 SHT 10 5 10 1685056 A SENG gt 12UDSP 12 A_SENS 168DC6 o o 1 A_SEN6 6 4 o 8DAC1_C 8DAC1_D 2008 1 E BDAC1_F R2747 12005 8DAC1_C oe AMPB 10 5
6. y aooe 0 OHM 0 OHM C645 0699 2643 0699 2643 0 047 D 620 0160 5944 m ou per Galles LG 02 vc7eMoscoT Re Vee s case 330UH 1 5 24 5 1826 1734 OMM 16065056 119 J88 e e 149260 9140 2261 os omg 2110 0944 1W 200 COMM 0699 2643 CLR Qi4 css e e ren GC 1 8 5 0699 3760 3 13 TOFF2 Pulse Width 2 5 A PIN 2 Une 25 30 VIN FB 52x o 0 047 D NS 1 Bias Boar m 2 x post 3 Th 8 138 68 58 meus 25 wise 85 2888 4 5 ge 99 9 eat gt VINE 2 8 82 2 l K 1251 3305 555 BEE Ss S 5 188 1729 ad 235 5 Di e Tum off Drive 8 2 8 7828 BS P 3 ATE 2A 8 8 i 9 acm Ei 5 51788 SE WE e 8 0688277 rre 586 SES az a as 55 Bue m R CXT s R637 BS FRB og SSE 5080 2571 CURCE 2A SSE 8 8 gt 185 ees 10K gp 21 O 1 zt gi SS S 5 9 AES 9 TL3 TusS Or ATS So lt 0699 3970 261 B 5 lt 2 0 or S T lt e lt s i e d g SHTDN Ee 0699 3830 re T NotLoaded C209 E e A 8 82 7 15 e 4 B Unreg Common S
7. 4746 7551 L5LE C2200 N Q R2277R2778 U215 or e amp M LS 4 5 68 0734 0735 E m2 0760 0761 IL Has U705 C208 22878211 2008201 a 0248 N NI N e R711R712 NI S 246 0776 H u706 0756 RPAH RG E vile U254 e 0755 e R708 Danz By U736 as 070 Ea 0757 E gt on a 0773 5 0211 0 p 9 E es Ge o R790 o t E bt ANN U287 U720 nm RE Ul b C 0786 oa N R791 4712 Y LW lt d e JE Be 0785 lt a x E m N N N L REZ 1N PI AT lo N NI m s Sle ReABES jana b lo Nilo N S 1 c a0 on ES ERSTE oE t Mes wes m RB7B4 NI J OIN N 0785 0712 e nd T ou Ire e EX zl U720 gt ES Uo R2753 ic i 0782 E omt o su O SG 0711 0716 0714 LL oj N gt NI N DAN 0781 lt N 2 2 0 9 LN NJ H o A T R751 N N i U780 m M U722 CHIP c 0741 N e Si C C p NJ o ER 10704 S SN RES 0753 E A 2 1724 N 4752 2 2 SOOS aN o I CI ES 0255 e 3m M IN TN 07519 0710 0740 N nn Ela NI N O LEE 3 D O 9 250
8. 45V IV CD M O WQ MS K ch 5 AA 2 eo D BEES 100000 10101010100 113 DITTO ooo E la dun gt E fou IERI 5 wel St dap MEE Je SEE 5 E BOF ED THD E E T 098 85 n 29 E 993 0 Moz f 20 n
9. C1838 0 047 14 0986 500 UVR LIMIT CU RERLTIME SHT6 EXT_CLK_SYNC SHT6 RAMP_RESET SHT1 D c992 a 5 C991 D SHT3 ACT14 45U em PUN 150 R1810 PWM RELAY PES NY FREQUENCY 28 GAL VA_LEVEL SELECT NOT cl CL LEUEL GAL 0585 LOADED SHTA IPEAK_LIM Des R997 Sri IPERK LIM J828 SHT4 JCT_LIM F6 S SHT1 REG RERLTIME F5 990 SHT2 6 LEU FRULT BER F4 INU OFF 61820 PROGRAMMABLE NOT de COUNTER Fe LOADED 5V VWW F1 R998 10 0 047 FO R1817 18 FO ANN ven WO 1 AA 12 464 0995 16 142 erase SUB on 1 1712 Z20PF O_SENSE_REL 27 500 SUB_A1 Sen doi um 115 50 SUB R2 3 GRL20U8Q IPCL A A2 I2 GND 5U SUB_D 13 95 14 16 SHT6 Q4 AC_MODE SHT6 LEVELING_MODE R1810 16 IMON_10X W 4 7K 6 O_OUT_REL RESET APT ue IMON_10X E 142 C1871 Coen RESET 520PF OU_DISABLE 504 EE f 500 2 2 5 n Y PROTECT
10. SUSEC C738 AC0 23 SHT 2 3 3 20 43 leo 79 100 122 140 157 1000 500 ac 152 ox 78 ace 150 119 SUSEC SHT 2 5 acs 151 0756 m ES 149 INTO 149 XILINX acz 148 nca 146 Ree eic ace 146 RESET XL CS a 1 160 PIND ot aco 4152 STRB R2755 L aco Hs 0756 0 ese 154 3 SHT 2 155 000 R2756 XL CS 290 INTO amp N XHSTRBe ROM CS R2757 160 DDS DN 47 cur XWSTRB amp Me7C2048 Pk M DC31 156 XDC0 7 A gt 55 ROM CS RESET OE DC29 5 i facies y G IE A16 124 120 8 3 15 41 SHT eS ES D15 0317 0026 8 18DRCC7 TEES 39 814 014 5 D 297 DC25 9 12DAC 6 81913 0135 0024 10 12DAC S tact ate 1 5 DC23 11 67 18DARC 4 SCH 36011 011 5 6265 63 12DAC 3 ACD D10 5285 0021 13 12DAC 2 09 12DAC 1 ACB 32 DB 11 D 24 18DACCO 12DAC 0 8 EPROM 14 D023 D7 132Kx16 oe DC22 DT 16 D 21 BYPRSS FOR 05 15 520 536 0016 18 A4 PRIETEN U 131 55193 Do Don 132 BDAC 1 ACT Sei 02159 Gs 505 505 114 8DAC 0 8DAC 0 2 AL D1 DC15 22 eco 24 po 21 DC16 DCI2 C739 C740 NC NCIES ES DC12 25 133 1000Pf 1000P f sou sou DC11 26 EIER GND1 GNDe DC1
11. uJ NE e cin 5 Q 3B O B 0010000000000 rn m d DI SCH HUHUUUUUSUHUU 3 012 D q g B gt aoe HsE SPB S56 TTX IER TSX OSS ee oso 193 OOOO QJ 0800000 700100001 d D m 5 BS gt g E to S E D Hm o gerd D m 299 98 gal m 68 L Tha Tun ezg bea azo d a 6 Su I o n za 985 Hoe PISIS o BEGG Br 5 Pin 3 Pin 59 59 50 50 R12 R11 6 81K 6 81K 5 t t t 1x 1x AC14 14 2 8013 R1 Re R3 R4 RS R6 260 A12 100K 100K 100K 100K 100K 100K A11 AC10 ACS ACB AC ACG ACS gt 4 ACS ace Lee AC 15 AC 1 ACO T5U A SPACING R10 R13 6 81K 6 81K 1 1x 1 32 UCC U4 ez 11 0 25E 8010 ac G at ac 1310 5189037 0417884 AD C S OS 6 ACS AD 318 5 ADC 4 19 4 ADCS 20 AD 6 21 HS0S I3 p 58
12. 20 misses v saa 6 Messy D amp amp 6 015965 608500 o Hiuor83 ot 1 Sg sssta L zig Un67621 820Illgog570853H199288 gg mm lLlereszseasun un Kom o E 9S8183IT Tl 1762 2v62 Nn BM 0583 o o 2 8 1 E d SCH E EES eem I E x E DEI ch G2823 eJ B 5 ceam Cho use ten o cet See 59 EE M228 o DI Xe Yum ES o m 908 o 18 89 Simeces o M Een GH Bo a EE Qu eT8aime a 5 pe l x 59 1 D lt E EG OS D EU J E 025 d oB BH OO 0 iD oH Ths E T 8T8 02813 CANTO o SEI 6084 O 0 8 5 ho SE ot 8088 Lo Z268TS _ eH 1083 o TEST 3 e ser 1880 1 eoss o aog eE uu 8s8 Ta L BIB MAS dea 2063 o 2 Of ga Tdlo pt 1 2088 o gt 3 06813 No ge S mzo6ta UP EO oe 94805 T o 6 DI BEI NIE 1588 Y U 54 BB TZ8r GERT pol ERD Mr ED Gerda E BB oooooooooooo
13. A_SEN4 4SUREF 12005 2M FILTER amp A D CONUERTER 4 ar 12005 gt 12UDSP FILTER amp CONVERTER 3 R2705 R2706 lt R2707 R2713 ESA 2715 0 10 10 C1763 0 10 10 C1757 C1758 C1759 C1767 C1768 C1769 C1751 1761 SU 201 55 2 35U 630 0281 630 0283 162063 R2701 R2702 j 0677 R2709 R2710 80677 NNV 16 BIT A D AAA AAA 16 A D 1890 612 1 VREF DOUT Z 1890 612 1 VREF 1 VIN pour Ax UIN Dour AGND AGND SEN Busy V SEN BUSY he AGND 5 AGND 5 CLK TE CLK IS C1752 SAMPLE 2 C1762 C1766 SAMPLE 2 a DGND m ha DGND 6800PF 6800PF 3300PF VEE 63y 12008 rae Ka 12UDSP P 12 n SE C1770 vi R2716 D 2 SS R2794 10 2 re R2791 0 0 12UDSP 12UDSP Vea A D_SAMP A D_CLK A D_CAL A D_D03 A D_D04 A D_D06 A D_D0S lt SUREF 12005 59 SUREF 12UDSP oy Rene FILTER amp A D CONVERTER 5 R2796 12VDSP FILTER amp A D CONVERTER 6 y ind R2721 R2722 R2723 R2729 R2730 2 R2731 C1773 0 10 10 C1783 0 10 10 C1777 C1778 C1779 C1787 C1788 C1789 0 1 0 1 rin hs Sie zy ee ce 1 C1775 ECH 35 UCC 550 359 359 UCC UDD 359 a 01 5585 R2717 R2718 6 U784 25 R6 TEADES ING R2719 R2720 83 s 9784 11 26 o Hs 16 BIT A D 1890 612 1 18 DOUT E VREF DOUT 22 1 2 2050 920 1 4 8 DOUT 4 UIN DOUT 2 LT1124 Ax CLK 2111124 AGND T BUSY SEN
14. CU ERROR ebe R462 PWM COMPARATOR 3EUTHU INTERNAL CLOCK SLOW START CKT 15UINU E 4470 44 470 EXT CLK ISO R1409 R1410 E R428 2471 5467 AS p gt 10URAIL REF 4 AAA 4 AI t AA AA z Ze 5 HCU04 Z HCU04 C471 51 1K 200 158 Jess zn C464 Se LI LRFIN 5444 Foa DEA 4200PF 50 9450 D WH 100U Tu 7 ve 2 70447 ZSD448 E uk R473 Ko R1407 RAIL INH ISO R457 f NL ron 5 62K i 0 NA MC C453 Y462 NL 232 S 2 54075 1 NS R456 047 Y bl ans 1 SUINU 21 5 50 C469 0420 0428 0465 NL NL R448 C447 042 16507 1650 10907 R460 CU AMP BUFFER 15UINU NI pe 22 _ D491 R452 LRF RAIL_UMON 500 zo DELAY 16 0464 9 A a 12 C473 1016 ale R1408 C466 40 4 eg Cext 5 DU PROGRAMMED GAL No 1 U463 19 oe 7 LRFDEL as 2 18 RRIL OU INH 5 RAIL INH ISO e CURRENT MONITOR PWM_EN 5 R454 C460 NL 2 2K 5 9 0459 NL 8 K 2 as 1 104 100U R461 NL R411 NL gt 1SUTNU NL C488 21 5 NL j EXT CLK RAMP RST T7047 S 4X C461 50 R466 NL NL C499 de SPARE GATES 1 047 500 R402 gt 15UINU ni DRIUER IC R1411 21 5 C489 Lt i000PF C495 10 R1401 iu 10URATL_REF 1000 z 64K 14 R486 i 24 9K 13 1SUINU C482 0 1 500 R487 VW 200 1SUINU ACIN 34072P C485 PCB C481 C483 d Lt 6800PF R496 6800PF t 1 5K x 500
15. REF_ADC2 59 UREF UCC 1755 RDC0B48 CH6 AGND DGND BADC2_WR BXDC0 7 50 TC 0 1 14 2 500 BADC1_A UREF UCC 8ADC1_B 754 ES CHANNEL MUX 8 BIT A D CONVERTERS RD BADC1_C 8ADC1_D 4 cH1 ECC 5 cH2 DB6 BXDCS 12DAC4_A 6 CH3 DBS SECH 7 DB4 FTES 9 CHS DB3 BXD 2 120 04 R768 081 BXDC1 DBO BXD 0 AGND DGND REF_ADC1 15 16 DSP_TEMP K S R770 AAA 120906 a 10K 12DAC6_B R772 LULA R773 10K R774 LULB AAA AMPA 10K R775 Sek 10K R776 AMPC 10K BxD 7 BXD 6 BXD 5 BXD 4 BxD 3 BxD 2 BxD 1 BXD 0 BIT A D REFERENCE BUFFERS REF_ADC1 12UDSP C787 TSUREF A 0 1 50 A11 0256 6 171013 REF RDC2 DSP TEMPERRTURE SENSOR 12005 DSP_TEMP gall R2780 10K Figure 6 17 DSP Assembly Schematic Diagram sheet 7 of 10 INU PCLR 50 SHT 1 DIGIN 0 15 SHT 4 0 R1794 R1795 R1766 R1767 R1768 147 147 ren NaN SS C1747 10K io 10K 147 147 A R1790 1791 oll 147 147 SQU Keng ee 1745 SC 147 147 50 RPA R1786 R1787 C124
16. 19 554 A GND 1 80744 rpm 0744 61 s Bxpce 18 7 R741 u 5 F BXD 7 17 086 18UDSP 8 WV I h 4 12656 087 RFB 4 1 96K 3 5 R2779 2 out Bl2 vmm 2 LT101z 111013 5 169061 A_SEN1 C258 12000 16 A_SEN2 B GND 2 o ds M 0 1 9 1 195008 5 A11 Mani 18 110255 C756 12UDSP 13 14 15 16 12DAC4_B navn 1apAc4_A 19 18 gt Z 19 20 a Si 0241 R2741 AD7837 55 BXD 0 24 CUAL 12 BIT 27 2 N Bxbc1 5 1 2 gapc1_A 29 130 1_ 2 22 RFB 31 32 12UDSP DB BADC1_C BADC1_D BXD 0 7 BxDC3 21 pBz i DUER 33 55 54 SHT 5 7 8 9 Y d 20 lees 5 5 19 A GND 12DAC1_WR 1 285 SINGLE PHASE 17 097 are p 12 ANALOG CONNECTOR 121 14 9 SHT 5 9 4 7 EDAC OUT B LULB R750 12DAC2_WR cs 8 SHT 5 Lite SES 10 1K 8 s Ax Al 12UDSP DGND USS UREFB C762 SHT 5 9 ai 11 7 10 ci SUDSP V Sou 8DAC1 C759 C2202 C2708 R749 15USEC MAN UDD 500 200 0 1 AGND_IN SN SDAC_LD 500 R2743 Ax pre 4 16 0248 E LT101z 15 8 DRCBB40 10 diro LL BDRC CLK 17 12005 0 1 8DAC1 C BDAC_SOT 20 11 500 12UDSP 8DAC1 D 8DAC1_E SHT 9 2 SUREF 1 8DAC1_F 2 SUREF
17. Figure 6 16 DSP Assembly Component Locations sheet 1 of 2 J721 NI 1 R1799 R1798 R1750 RH251 dj 9 C740 a CIA R1220 R1216 R1217 5148 C R2757 I imi tot R2255 I 1 1 88 C1 8t 126 55756 R1iPSBRIPSVRIPSE RIALS Q R1H2BRiPZb5Ri PIBRIZ7IS 1 2 1 1 9 cie R1P2 R ZAZR1 74 H be C726 R1 PR 95 1 51175186 1 10 4 9 R2762 R1ifSP RII7BsRIPSB RE 759 R1 786 R1287 51290 291 10248 C1ZHEC1H32 1 344 R1B8B RIPGSR1 PHB R LZ7BO H2B RI7I9R1PSP RIABS ZHPCiE88 10 0 5295 12717 RIZ GET 1 RIZR REAP 5 1 0 CiFE7CiZ gb RIZG1R1PAZP REZ 1 Z0 R1205 RIP 1 1 05 C1 0C 10 R1H0BRIPUP RTPOP RP R 551 READ 1 6 1 7 1 4 B R1H1B RIIS RIRE RIDZBSR R146 1 6 178151 RIP 3PRII7ZBsRiPaBRILZPO mer IPAS EE 255 1 82 Un 1 20 9 RIEZ RIZ 1 RiI288R TZEO R1P4eR 1213812362 1237 1 1 5 C1PB8 CIT23 RA P3ORIIZB1R1 P 4b RIA BAEN EISES zam 3 sgdja 2229 el 2229 te r NI s J d 8
18. CHECK U500 RELAY 501 VOLTAGE DRIVER RESISTORS U500 6 OUTPUT VOLTAGE 0 01 PROGRAM OUTPUT OFF CONNECT A 20 OHM LOAD PROGRAM CURR 10 OUTPUT ON CHECK U502 AND ASSOCIATED CURRENT gt COMPONENTS 10 AMPS 7 U502 6 OUTPUT 0 0566 x s YES CHECK IMON VMON and L MON SIGNALS AT A10 CONTROL BOARD 500 mV div 5 00 us div A9TP500 Figure 4 9 Output Filter Relay Troubleshooting 41 4 Troubleshooting A11 Trigger BNC Board Troubleshooting Table 4 10 Trigger BNC Board Troubleshooting Communications Troubleshooting Turn on unit with no voltage or current programmed See Figure 4 10A B C D As long as waveforms and the output off Use an oscilloscope and check for are similar communications are OK A problem pulses at U150 1 U151 5 U153 3 and U154 1 exists 1f waveforms never go high or low 2 2 Trigger Out Troubleshooting TRIGGER CONTROL INIT CONT ENTER Then enter SHIFT TRIGGER If no output is observed trace the signal from the A8 DSP board at A11 U165 12 Negative pulse referenced to H common A11 U157 12 U165 13 Positive pulse referenced to H common A11 U165 12 U164 10 Positive pulse referenced to D common Connect an oscilloscope to the Trig Out BNC and Check for a trigger output pulse every time the enter the following front panel commands SHIFT TRIGGER command is entered
19. CHECK U423 BIAS DETECT CIRCUIT PWM_EN WILL INHIBIT A8 DSP BOARD pU CHECK EXT SYNC U436 3 TO _ WAVEFORM NO CHECK EXT SYNC A10 J824 1 CONTROL BOARD SES BEER et 2 IF SIGNAL NOT PRESENT A10 J824 1 THEN A10 CONTROL OR A8 DSP BOARD FAULT OK THE CV ERROR AMPLIFIER PWM COMPARATOR PWM DRIVER RAMP GENERATOR AND HV LOW RAIL DETECT CIRCUIT CAN BE CHECKED BY APPLYING OV OR 10V TO RAIL_VMON CHECK RAMP GENERATOR AT U475 1 AND U475 7 SEE FIGURES 4 5C AND 4 5D OV applied 10V applied 15V 15V ERROR AMP U447 7 5V 0 PWM COMPARATOR U462 7 5V 5V RAIL OV U463 3 LOW WHEN RAIL OVERVOLTAGE IS TRUE 0 0 RAIL ISO U463 4 HIGH INHIBITS PWM DRIVER PULSE RAMP PULSE U463 14 SEE FIGURE 4 5B PULSE 1 2 EXT CLK ISO U463 15 SEE FIGURE 4 5A PULSE PWM DRIVER disconnected U491 8 9 SEE FIGURE 4 5E PULSE PWM DRIVER normal U491 8 9 SEE FIGURE 4 5F 5V RAIL INH U424 14 TOGGLES AT APPROX 10 6V Q RAIL VMON RAIL LOW WARN U424 14 TOGGLES AT APPROX 9 3V RAIL VMON 0 LRFIN U424 1 TOGGLES APPROX 8 4V RAIL LRFDEL 0433 1 Figure 4 4 DC Rail Assembly Troubleshooting 29 4 Troubleshooting 2 00 Vidiv 5 00 us div EXT CLK ISO U436 6 R459 TO TP404 83 kHz EXTERNAL CLOCK RAMP PULSE A B RA
20. C728 6229 0 9 rote ho Ul SS d R3 E Az Es N EN A NI oO N NI Ul UN C706 L 714 0 Hz 9 4 edo oae WR 48 C727 coecen Ga 849 878152788 C778 C205 zelt Feb tegy 54 0549 R2763 Seca ceca 4715 049 EI 90 deo 4 Zi CO N Sy N DN N 112140 449 C 4545 cay SD azh A N C tJ Oc Oo CD Figure 6 16 DSP Assembly Component Locations sheet 2 of 2 1505 SHT 6 AGND_IN 15USEC C701 SU BIRS 59 595 L 5UUNR 10 NOT LORDED
21. DIV DIV II 10 uS DIV 10 uS DIV C U201 202 PINS 1 7 D L201 L204 L213 216 DRIVE SIGNAL DRIVE SIDE DV DIV 10 uS DIV E L201 L203 L213 L216 REGULATOR SIDE Figure 4 3 FET Assembly Test Waveforms 28 Troubleshooting 4 5 DC Rail Assembly Troubleshooting CAUTION This board contains hazardous voltages during some troubleshooting procedures Use extreme caution Before troubleshooting the A5 DC Rail board refer to the previous procedure and determine that the A3 AC FET Assembly is good The 503 Vdc rail 4Vdc is generated from the 300 Vac input board rail the FET board and the power transformer The A5 DC Rail board contains the PWM and CV error amplifiers for controlling the FET switches Troubleshooting the bias PWM and CU error amplifiers must be done with the 300 Vdc rail disconnected from the A3 FET assembly DISCONNECT CABLE FROM A3 FET BOARD TO J1042 ON A4 AC INPUT BOARD DISCONNECT CABLE FROM A9 OUTPUT BOARD TO J627 ON A7 INVERTER BOARD REMOVE 5 SCREWS HOLDING A5 DC RAIL BOARD AND HOLD A5 DC RAIL BOARD IN VERTICAL POSITION USING BOARD HOLDERS JUMPER TP 1 amp TP TURN ON AC INPUT MEASURE BIAS VOLTAGES TP404 COMMON TP401 15VDC TP402 15VDC TP403 5VDC MEASURE 10V RAIL_REF C454 10 00VDC
22. C402 D400 r 1 IHS400 195402 vl CHOKE E430 1 GRA rev mum E430 2 WHT 7GRA WHT RED GRA WHT BRN GRA E430 3 8 PF 330 PF 7330 PF 16000 16000 16000 0402 FROM E432 2 POWER O XFMR E432 3 Q R407 2m 5x 10H R406 219 5 104 C404 C405 Se ET E PF 3550 PF 3550 115406 16000 16000 16000 4 0406 E432 4 Q 5 IMON E430 4 R412 4 99K 05 5 E IMON 454 2 NL XFMR SHIELD LOAD 1SUTNU E454 1 URRIL R405 R1417 10W TO OUTPUT PCB Figure 6 11 DC Rail Diode Assembly Schematic Diagram sheet 1 of 3 PCB GROUND NOMENCLATURE A1 PWM CLEAN ANALOG Ae POWER CLEAR AS CURRENT MONITOR 01 DIGITAL GENERAL D2 DIGITAL PWM POWER INVERTER BIAS 15U_INU_UNR Leah U416 T 15UINU zl LM317T lo 1 I D R418 R415 0 243 4 Ax TP403 C419 R416 2 74 C409 C411 350 7r 359 359 MC29 2 6 we TP404 SS I Sie Jusen 1 13 3 5 2 6 4 R419 10418 2 74K 413 CY XX D420 220 mE R420 245 4 AHC 1 a le U418 NE LM337T 9 15UINU TP402 415U INU UNR BIAS DETECT T15UINU R424 21 5K C426 R425 Ge 4 99K 10 15UINU R432 21 5K R431 26 1K 15SUINU C429 047
23. Figure 4 1 Overall Troubleshooting Procedures sheet 1 of 2 24 Troubleshooting 4 MEASURE MEASURED PROGRAM OUTPUT OFF CONNECT LOAD RESISTOR 120 VAC OUTPUT VOLTAGE IS WITHI 20 OHMS AND CURRENT SHUNT ACROSS OUTPUT TERMINALS SPEC TERMINALS PROGRAM OUTPUT ON CURRENT 5 00 PERFORM VERIFICATION amp CALIBRATION AS REQUIRED DISCONNECT CABLE FROM A9E527 OUTPUT BOARD TO J627 INVERTER BOARD IS GO TO A7 INVERTER TROUBLESHOOTING DC RAIL LED MEASURE DC RAIL J444 1 TO GO TO 5 DC RAIL J444 3 TROUBLESHOOTING 503 4 VDC MEASURE CHECK OUTPUT RELAY A9K500 A9Q501 D501 120 VAC OUTPUT RELAY HI Q A10J524 45 9 501 TO OUT RELAY HI Q A10J821 22 IF THESE SIGNALS DO NOT TOGGLE WITH OUTP ON PROBLEM WITH A1 FRONT PANEL OR A8 DSP BOARD MEASURE 23 5 Vpp SINEWAVE GO TE ANDSP A10J822 5 TROUBLESHOOTING CONTROL CHECK PULSES AT A10U1801 25 FIG X X GO TO A10 CONTROL BOARD TROUBLESHOOTING IF FAULT IS VOLTAGE OR CURRENT READBACK CHECK OUTPUT AND CONTROL BOARDS IF FAULT IS TRIG IN TRIG OUT RI OR DFI GO TO A11 TRIGGER BOARD TROUBLESHOOTING IF FAULT IS NO OUTPUT CHECK A7 INVERTER BOARD Figure 4 1 Overall Troubleshooting Procedures sheet 2 of 2 25 4 Troubleshooting A1 Front Panel Assembly Troubleshooting TURN UNIT ON iF DISPLAY DOES NOT LIGHT PRESS SHIFT KEY COMMUNICATION FAULT MAY BE WIT
24. SCOPE DC COUPLED GATE TO RAIL Ov 5 00 V div A B 0 00 V 2 00 us div 5 00 V div 2 00 us div Troubleshooting 4 16 00 us SCOPE DC COUPLED DRAIN TO RAIL 5 00 V div C D 0 00 V 2 00 us div 16 00 us 20 00 V div 0 00 V 2 00 us div J526 OR J527 EXTERNAL 30 VDC TO J627 OUTPUT ON Figure 4 8 Inverter Assembly Test Waveforms sheet 1 of 2 35 4 Troubleshooting 2 00 Vidiv 0 00 V 2 00 us div 5 00 V div 0 00 V 2 00 us div 5 040 us GATE TO G H 10 00 V div 2 00 us div 200 mV div 0 00 V 5 00 us div 1 mA mV E626 1 E627 1 INVERTER TO CURRENT E626 2 E627 2 EXTERNAL EXTERNAL 30 VDC Soe TO J627 OUTPUT OFF Figure 4 8 Inverter Assembly Test Waveforms sheet 2 of 2 36 Troubleshooting 4 Slow Start Procedure Perform the overall A7 inverter troubleshooting documented in Figure 4 7 before you perform the slow start procedure The A7 Slow Start troubleshooting procedure allows testing
25. 88 8 gt 58 Y P t 8 5 88 Y 9 29 amp Ba SC 2 5 lt SONG lt o ke 5 ONG lt o q e al S 99 R zl Bus 52 o 955 85 os ee e o LSS ass Less n e e o e e 8 SS g RE 8 BRE o o o o 288 2 88 288 2 88 55 289 o 583 o 88 o 558 5 NO 8 8 S LS s TS s 1906 0358 25 s amp zo 1906 0358 ons es E ese 248 SHEE EE O 90 O e BIB 0 6 6690 BILE 0268 6690 RT 5580 9669 V OL NNN 9 MAY 2994 e e D 5 oo 5 8093 B0 ales 822 R5 e e 18 0261 02269 51229 1250 1918 7089 m 5 Lad ANSE 13Wd O cz29 9 2 188 2000 ROL 200 01 88 3 6095 0199 3 d o 991 041 o 9471 0416 2 ala i Ze z ala leo E e 8 e 8 H 9291 8 r 22 K 1891 8 APT6025BVR 69261 e S ae l APT6025BVR x i 149256 149256 ele g S olga E 5 8 x 89267 8 4 9 1 04 9231 0216 a la T io T lolo P T Va 291 L 09 Ng 9291 APT6025BVR APT6025BVR 149256 m z 149256 5956 5956 5926 19261 002 002 002 ML WW A000L popeo PR Ek 72908 9 86 10 29549089 19261 9 9267 11 IN A000 002 ML e926 002 ML 9898 189H 8898 2099 96814089 91 006 S 9 y AAA BI 1199 6895 ep 252671 A009 208 12611 A009 6075 6690 6076 6690 6078 6690
26. 0698 8812 RES 1 1 125W R581 0683 0475 RES 4 7 5 25W R584 591 0811 1810 RES 3 6 5 3W 594 0683 1015 RES 100 5 25W RT501 0837 0397 THERMISTOR TB552 All 0360 2578 BARRIER BLOCK TP500 All 1250 1918 TEST JACK U500 1826 1081 IC LF411A U502 506 1826 1135 IC 27 0503 1826 0412 LM393N W501 7175 0057 WIRE 2 NOTE The following parts are used only in Output Filter assemblies Revision C and below K500 6812A B 6813A B 5063 3494 RELAY ASSEMBLY 6841A 6842A L510 511 6812A B 6813A B 9140 1743 CHOKE 82uH MOLDED 6841A 6842A R500 501 6812A B 6813A B 0698 3260 RES 464k 196 6841A 6842A R503 6812A B 6813A B 0812 0047 RES 5 5 5W PW 6841A 6842A R584 591 6812A B 6813A B 0811 1810 RES 3 6K 5 3W 6841A 6842A 61 5 Replaceable Parts Table 5 9 Parts List for Control Board Reference Desig Applicability Agilent Part No 5080 2410 Programmed GAL Freq 5080 2408 programmed GAL Status 5080 2409 Programmed GAL Protect 5080 2407 Programmed GAL PWM RLY Table 5 10 Parts List for Front Panel U004 All 5080 2384 Programmed ROM front panel Table 5 11 Parts List for DSP Board 6841A 6842A 5080 2421 6841A 6842A 5080 2422 6841A 6842A 5080 2423 6811A 6812A 6813A 5080 2411 6811B 6812B 6813B 6841A 6842A 5080 2424 6811A 6812A 6813A 5080 2412 6811B 6812B 6813B 6841A 6842A 5080 2425 Table 5 12 Parts List for Thermistor Board Reference Desig Applicability Agilent
27. AC Input Board Tested AC Input Board Tested AC Input Board Tested DC Rail Board Tested Bias Board Tested Bias Board Tested Inverter Board Tested DSP Board Tested DSP Board Tested Output Relay Filter Board tested Output Relay Filter Board Tested Control Board Tested Control Board Tested Control Board Tested Trigger BNC Board Thermistor Board Power Transformer Assembly KEYPAD AC SOURCE FRONT FRAME WINDOW FRONT PANEL LABEL KNOB 6mm NAMEPLATE NAMEPLATE NAMEPLATE NAMEPLATE NAMEPLATE NAMEPLATE NAMEPLATE NAMEPLATE JUMPER BARR BLK CVR TERM BLK DC SCREW DC COVER INV HEAT SINK FET PAD INVERTER DFL RI TERM BLK 4 POS CABLE TIE CLAMP CABLE rail choke LINE SWITCH TRIM SIDES FR GY COVER CHASSIS INVERTER CHASSIS AC FET Replaceable Parts 5 Table 5 1 Main Assembly continued Ref Desig Applicability Agilent Part No 6813A B 6842A 6811A B 6811A B 6811A B 6811A B 6811A B 6811A B 6811A B 6812A B 6841A 6812A B 6841A 6812A B 6813A B 6841A 6842A 6813A B 6842A 6813A B 6842A 6812A B 6841A 6812A B 6841A 6812A B 6841A 6812A B 6841A 5001 9803 5001 9804 5001 9805 5001 9808 5001 9809 5040 1676 5040 1697 5040 1704 5041 8801 5041 8819 5041 8820
28. U619 2 amp U620 2 TROUBLESHOOT 12 VDC BIAS TROUBLESHOOT Q644 amp U621 PCLR CIRCUITS U607 1 amp U609 1 TROUBLESHOOT 0602 0619 amp INN OFF CIRCUITS USE 8 DIP TEST CLIP TO CONNECT FOLLOWING TEST EQUIPMENT 1 CONNECT FUNCTION GENERATOR 83 KHZ SQUARE WAVE TO U602 3 amp U602 4 2 SHORT U602 5 TO U602 7 OPTO MUST BE LOW FOR U608 TO GENERATE TURN ON PULSES CONNECT OSCILLOSCOPE TO U608 2 AND INCREASE FUNCTION GENERATOR GAIN UNTIL 83KHZ SQUARE WAVE IS OBSERVED U608 2 SEE FIG 4 8 G NOTE FUNCTION GENERATOR IS CONNECTED DIRECTLY TO U602 OPTO DIODE BE SURE FUNCTION GENERATOR HAS INTERNAL IMPEDANCE OF 50 OHMS CHECK GATE DRIVE TO ALL POWER FETS Q601 THRU Q608 AND Q611 THR Q618 SEE FIG 4 8H CHECK WAVEFORM AT H BRIDGWE OUTPUT E626 1 TO E626 2 AND E627 1 TO E627 2 SEE FIG 4 8H IF ALL WAVEFORMS ARE CORRECT REINSTALL A7 INVERTER ASSEMBLY CONNECT ALL CABLES EXCEPT 503 VDC RAIL CONNECT EXTERNAL DC SOURCE TO A7J627 SEE A7 SLOW START PRODEDURE CHECK CURRENT WAVEFORM FIG 4 8J PROGRAM AND CHECK OUTPUT VOLTAGE AND CURRENT TO DETERMINE IF A7 INVERTER ASSEMBLY IS OPERATING PROPERLY 34 Figure 4 7 Inverter Assembly Troubleshooting sheet 2 of 2 A10U1801 25 PWM DRIVE SCOPE DC COUPLED GATE TO RAIL Ov SCOPE DC COUPLED DRAIN TO RAIL 1 00 V div 2 00V 5 00 us div 5 00 V div 2 00 us div
29. 015 31 11 36 R15 ARXD RXDB X1 CLK UCLK 7 RI sige 4 eda la V L3 Tx pB 37 Nc TERS TS 15 28 a13 505 DFI SMODE d 12 Alaro RM xro 3 0 7 2 our TOUT 15 SHT 2 4 ROGO 25 512Kx8 ACI 25 59 59 ATXD RC10 23111 9010 25 9 CEN 0 6 rig 15 ARXD OCH ag R10 s6 HR 08 OPS 55 RXBIRG Deze E28 9 27 55 7a 054 15 tgo BNC BOARD a OPZ NC CONNECTDR ac 5 21 DC 21 023 A2 6 31 a 07 ae 2 SMODE DeZo E30 6 06120 D6 Sla 20 D22 ACL Ala iei 14 prr acs 7 19 D5 19 D21 R2 R727 ACO 2 32 AS DS 26 2 AD T R ACD 8 18 064 ACAD 8 18 DC20 UIRQ 94 77 DCS 17 D19 3 695 4 98 21 DC Aas EIER 10 BS 15 D2 15 DC18 IP6 25 D6 RXBIRO 3 sure ACL 1i on 14 001 ACL 11 14 Da ps 60 xs RXAIRQ oe ACO 12 13 000 ACO 12 13 DC16 26 x4 80 00 IP4 D4 19 DZ uss IP3 03 27 DC2 16 2 18 DC1 01 158 DCO Y 505 1 0 00 GND 22 0 0 31 gt SHT 4 3 4 SHT 1 2 8 t _ a WR SHT 2 3 SEN Figure 6 17 DSP Assembly Schematic Diagram sheet 3 of 10 SUSEC SUSEC
30. 0683 8215 RES 820 5 25W R204 All 0698 0083 RES 1 96K 1 R205 209 229 233 All 0683 2005 20 5 25W 6174 R206 231 6811A B 6812A B 6841A 0683 1515 RES 150 5 25W R206 231 6813A 6842A 0683 7505 RES 75 5 25 R207 232 0683 0335 RES 3 3 5 25W R208 230 All 0683 3305 RES 33 5 25W R210 228 6811A B 6812A B 6841A 0683 2015 RES 200 5 25W R210 228 6813A B 6842A 0683 1015 RES 100 5 25W R211 212 226 243 0683 1535 RES 15K 5 25W R220 221 224 225 0699 3196 RES 150 5 IOW R222 0811 2556 RES 1 25 1 4W 56 Replaceable Parts 5 Table 5 6 FET Board continued R227 248 0698 3159 RES 26 IK 1 R237 239 241 242 273 275 All 0757 0437 RES 4 75 1 R238 240 0757 0280 RES IK 1 125W R244 0757 0417 RES 562 1 125W R245 255 0683 1015 RES 100 5 25W R246 0683 1555 RES 1 5M 5 25W R247 6811A B 6812A B 6841A 0698 3450 RES 42 2K 1 R247 6813A B 6842A 0757 0460 RES 61 9K 1 R249 All 0698 3518 RES 7 32K 1 R250 6811A B 6812A B 6841A 0698 3499 RES 40 2K 1 R250 6813A B 6842A 0757 0458 RES 51 1K 1 R251 All 0757 0288 RES 9 09K 1 R252 All 0698 3225 RES 1 43K 1 R253 6811A B 6812A B 6841A 0698 3136 RES 17 8 1 R253 6813A B 6842A 0757 0446 RES 15K 1 R254 All 0698 3279 RES 4 99K 1 R256 6811A B 6812A 6841A 0698 3439 RES 178 1 125W R256 6813A B 6842A 0698 3432 RES 26 1 1 125W R257 0757 0316 RES 42 2 1 R258 0683 1035 RES 10K 5 25W R260 261 263 265 267 0683 8205 RES 82 5 25W R262 26
31. 15U 0 042 WFAC_MODU 500 VA 05 ZC U 15 AD637 5 R888 SHT1 6 e UIN BOUT N Du OUT c 214 R1927 TIPS Une QUT NC 3 V7 ou 1101858 C866 Cos RS 1M T NOT OUT OFS C869 LOADED 10 cau cs Ee R1924 ze I_MON_RMS DEN IN BIN 0 097 511K Z 15V V Y 6523 LEUELING MODE NOT T RMS Ras COMPARATOR LOADED 35 LP365 R885 C878 NE ja U_LEVEL CURRENT RMS DC CONVERTER R1916 150 NOT UR LEUEL R1829 LOADED 13 em SHTS z CL LEUEL 05 U865 2 LEU FRULT dT 4 6 70637 SHT5 6 VIN BOUT NOT 14 R1826 LORDED R1909 C1865 11 OUT NC MON EMS NVV 1 60 C873 Soe 31 6K 1 DUT OFS R Zou KE al Ge e 0097 6 kp y867 DEN IN BIN NOT 1 LORDED 874 C1861 NOT 0 22 RMS CURRENT LOADED 500 01828 C88 121K R1897 R893 Re ee Raat De e NNV NNV TzBMS PRDO 50 sou I_RMS_PROG 150K 365K C1866 365K 23 7K 23 7K 1 1 1 SHT6 1 x ale 1 1 047 500 500 V Figure 6 19 Control Assembly Schematic Diagram sheet 2 of 7 FET JUNCTION TEMPERRTURE CIRCUITS MULTIPLIER THERMISTOR 15 UR947 CONNECTOR CURRENT SQUARER cree 6 194 ANN REF lt 2 15 6 19U 2 J855 15 2 5 REF I L MON KE 6 TEMPERATURE INTEGRATOR SHT1 4 5 6 E 7 R1918
32. 5 HI7ZLOW RAIL DETECT P URAIL RRIL OU INH e 10URRTIL REF 44 OOINU SUSEC R444 R1405 R433 C434 681 4 64K SE 1 047 jue C441 NX 047 5 5 15UINU HCPL 2730 NY p cS R434 NL R438 1 44 t WV R1404 1M 4 64K R435 1M 0436 1 047 RAIL_VMON 500 5 HCPL 2730 dao 15UINU SUSEC 3 U424 d 14 047 gt R446 R1403 j 12 2 61K 4 64K SYSEC 4 U424 3325 RA RAIL PCLR ISO 22K 7 RAIL HI_FAULT 1 Vie PUE NL 3 a RAIL LOW WARN 5 RAIL_LOW_FAULT 5 RAIL_INH TO HCPL 2730 SU OUTPUT gt EXT_SYNC m SUSEC SUSEC o SUSEC R1402 GNDX 4 64K U433 2 N 2 LRFIN 2 a 5 emo HCPL 2730 E 4 99INU PWM_EN 505 R458 681 RAIL_INH_ISO que EXT CLOCK SYNC SUTNU dr d R450 R459 _ 459 8 681 4 64 T7047 NL NL Sov 2 EXT_CLK_ISO OE 3 5 SECONDRRY ISOLATION Figure 6 11 DC Rail Diode Assembly Schematic Diagram sheet 2 of 3 TSUINU
33. 5 4 2 R15 428 iE UF 24 55 RIAL aC12 apco UF LATCH S 1 ESS 0 VF_BLANK Gp 28 901 Ale Geert UE PM e HS00 oui 25 50AC10 HSI1 10 24 SLAC mem JESS 0 15 AB 2 7 P2 6 2 5 1 254 apy 33 D I 2 54 DC6 01 P2 3 56 1 vec P2 2 205195 RDCO 4 cs 2 56 ADA 50 5UF a alk poli 190 945 ADCS LL 3 TxD AD3 DI 5 58 ADC2 P S8 ADCT L2 LZ 9356 5 20 7 901 57 P0 6 ADO ADGA 20 20 KICZ 101506 ADC 23 KIC2 ito 32 22 R54 R57 K gies oe ADCS i Bt KICO 7502 Pi 30 5 550 0125 KOC 4 Po ADC 3 17 Ei D6 10 10 I g P0 1 PLASKO KICS 2A Ke C31 R58 R60 15 P0 0 P1 3 21 KOC2 6015 AAA AA UREF P1 2 10 10 loo Pi 1 20 ADCO J1 100PF 19 KOC1 8 500 C33 R16 16 1 0 U16 z gt RC11273 TELE 215 GND JACK 6 100PF R15 14 5 500 25 R53 R56 50 RERDY V pos 4 6 81K 03 3 80C196 m UF_DATA 2 10 10 1 1 es NI am OE CLOCK 1 C30 RSS R59 64 CLKOUT NNV 45L BUSWIDTH 20 0 5 10 10 V 1005F 1 8 8 USS2 USS1 Li Di K set 1 100PF 2 10 5 1 7 7 Y 6 MHZ KICO 5 NOTE YRI 1 ALL 1206 RESISTOR VALUES ARE IN OHMS 1 1 84 i ALL 0805 RESISTOR VALUES ARE IN OHMS 1x 1 10W UNLESS OTHERWISE SPECIFIED 2 ALL CAPACITOR VALUES ARE IN MICROFARADS UNLESS OTHERWISE SPECIFIED 3 KEYPAD SHIELD SHOULD
34. 8 Slowly increase the external DC supply voltage to 60 Vdc observing the current from the external supply The external supply should go to 60 Vdc with only 200 to 300 milliamperes current from the external supply If the current raises immediately check for shorted FETs on the A7 Inverter assembly 9 Connectan oscilloscope to the unit s output terminal block Enable the output Using the front panel knob increase the output voltage while observing the oscilloscope A harmonic free sine wave should appear on the oscilloscope until the output voltage reaches approximately 30 35 volts At this time the sine wave will develop a flat top This test verifies the voltage control loop 10 Disable the output and connect a load resistor 20 ohms capable of sinking 1 5 to 2 amps to the output terminals of the unit 11 Enable the output and set CURR LEV to 1 amp The unit should current limit at 1 ampere and the CC annunciator should come on The response of the RMS CURR LEV loop is slow so you will have to wait a moment Set the CURR LEV to 3 amps and set CURR PEAK to 1 amp Both the CV and CC annunciators should come on These tests verify both the RMS and PEAK current loops 12 If the A7 Inverter assembly passes the above tests the voltage and current PWM loops are functioning properly If the A7 assembly fails when the internal 500 Vdc rail 1s applied it may be due to high voltage breakdown on either FETs or capacitors on the A7 assembly or the
35. He C1774 CAL C1784 AGND CAL CLK IF C1772 C1776 SAMPLE C1782 C1786 SAMPLE 4 Kl Ms DGND DGND 6800PF 3300PF 6800PF 3300PF VEE 650 12005 650 SEN 18005 930 12 RESENS C1780 C1790 1 1 xw R2724 m R2732 10 10 12UDSP 12UDSP 185006 A_SEN6 Figure 6 17 DSP Assembly Schematic Diagram sheet 10 of 10 30033658 39UMW 6 eeeragm HH9 T6I
36. M3 C2700 l 8MM 055 STANDOFF 550066 1595 12005 TiSUSEC SUDSP SUDSP 2 SUREF 15 DETECT 15USEC 15 DETECT BIAS DETECT CIRCUITS NU RAM STORE DELAY 14 NOMINAL 5U 62201 45086 R703 2 530 10K R704 10K 1 15USEC 713 7 NOMINAL R714 AAA 2 S5UREF R713 3 16K R711 2 5K 1 1 R712 13 7K x 15USEC 316K 5 DETECT amp DELAY 54 A R2790 100 50 C710 50 ee A 70 1 5209 R706 8 10K 2 5K UCC z 9707 g RESET 2 RST RESET Z SN SST 4 SHT 2 4 8 RSIN REF 2 53U R707 731 He Seg R710 3 32K 10K 0 1 R705 560 R709 560 vz S C211 8 2 500 1 5UUNR 59 R715 D701 10K 50 UNREGULATED DETECTOR C713 Y 70 1 R716 560 Ss R719 02021 V kc PE 21 lt ES SHT 2 2 8 R717 129091 10K Wa 12 530 INU PCLR ieu Figure 6 17 DSP Assembly Schematic Diagram sheet 1 of 10 23 SHT 3 4 BYPASS FOR 0210 21 SUSEC 505 SUSEC 505 TSUSEC 6 40 24 DC0 21 SHT 2 4 PCLR SHT 1 3 8 RESET SHT 1 4 8 gt AC23 acaa 91 AC20 AC19 18 12 16 AC15 AC14 AC13 198 11 AC10 aco 8 AW 6 ACS AC4 AC3 aca AC1 ACO DC31 0 30 0 29 0 28 0 27 D 26 D i 0 24 0 23 0
37. NOTE Power FETS 601 through Q608 and Q611 through Q618 should be matched by manufacturer and date code If any are replaced they should be mounted using a torque driver set for 5 inch pounds TURNON N AC SOURCE A10U1801 23 TROUBLESHOOT A8DSP A10 INV_OFFLOW gt CONTROL ASSEMBLIES EE FIG 6 18 CHECK FOR PWM SIGNALS AT PWM DRIVE A10U1801 25 SEE FIG 4 8A 10U1801 25 PWM SIGNAL RESENT TURN UNIT OFF REMOVE FROM OUTPUT A7J627 J625 TURN UNIT ON y CHECK Q601 THRU Q608 AND Q611 THRU Q618 GATE SIGNALS SEE FIG 4 8B 4 8C CHECK Q627 Q629 Q637 AND Q639 DRAIN PULSE SEE FIG 4 8D CHECK Q633 Q635 Q641 AND Q643 DRAIN PULSES SEE FIG 4 8E gt CONNECT EXTERNAL 30 VDC TO 4627 4627 1 TO J627 2 REMOVE CABLE S TO J526 AND J527 ON A9 OUTPUT BOARD CONNECT OSCILLOSCOPE TO J526 AND OBSERVE WAVEFORM FIG 4 8F IF WAVEFORM IS NOT CORRECT GO TO A ON NEXT SHEET IF WAVEFORM IS CORRECT CHECK A9 OUTPUT BOARD FILTER Figure 4 7 Inverter Assembly Troubleshooting sheet 1 of 2 33 4 Troubleshooting A REMOVE A7 INVERTER ASSEMBLY CHECK FOR CRACKED OR BROKEN FETS BURN MARKS ON PC BOARD IF BROKEN FETS OR BURN MARKS ARE OBSERVED REPLACE A7 INVERTER ASSEMBLY APPLY 20VDC J638 2 AND 5VDC J638 1 638 34 IS COMMON OR USE SLOW START PROCEDURE SEE STEP E BELOW AND LAST PAGE OF A7 TROUBLESHOOTING SECTION 12VDC
38. WAVA AMPA R794 R795 gy LULA SHT 7 3 0 NOT LOADED DES 500 5005 0 0 NOT LORDED 10k 1 RL 0 5 1 L Ax RL_OFS 2 LT101z 12UDSP Figure 6 17 DSP Assembly Schematic Diagram sheet 6 of 10 SHT 6 SHT 5 10 SHT 5 SHT 5 6 8 9 SHT 6 9 SHT 6 SHT 6 9 SHT SHT SHT SHT 16ADC2 A_SEN2 16 1 R752 NNV 12005 C768 C766 0 A_SEN1 FILTER amp A D CONUERTER 1 TSUREF R756 0 C772 1 359 12005 59 C767 6800PF 630 R D SRMP R2786 2 R2787 FILTER amp A D CONVERTER SUREF 12005 50 R764 R765 R766 0228 10 10 R758 C782 C783 C784 2 Cip e C780 1 1 5 135 1 350 350 UCC UDD 359 Ve 1 0755 350 R761 64752 201 40672 AAA TO R762 R763 6 0752 T 16 BIT 0 612 1 NNV NNV TX DOUT L 2050 920 1 Dour 2111124 1 c AGND CLK 2 LT1124 S SEN BUSY AGND 0281 092681 0 1 2720 JI 3300PF ST 63U EA f 50 C785 1 gt 359 R2788 2 R2789 0 0 12VDSP A D_CLK A D_CAL a A D_D01 A7D_D0e 8ADC1_RD BADC1_WR BADC2_RD
39. e e 555 E E 0625 5 zo 588 588 o 5 3j ox n S g 9 5 Break before make circuit 2 38 SS SS GH au lt Q 12 85 lt oo tt 099 5 wo O 8 58 J646 1 aper 6 _ 8 9 261 B P me an OF qp poe 01600 5944 los ud s dek LER SP Board E ae 5 NIC POST 3 No Connect ae 8 IER 88 5 55 BLK 4 a DSP Comm U605 148865656 l F 125153305 1820 5656 5 tt CLR Q Bu Turn on Pulse Width 2 3 o S m oo Posiiya edge tigger 10 p 60 e RS s lt EAPN a TONM 2 25V EM VW CAT BRR C637 365K B GND 10K A o SIA SRM Og GND 0699 4417 0699 3970 20 0047 D 298 elie d T uen UN 429 TSS 738 E Not Loaded 4 ER o 98 25 7 ki ves D Ka S 29 WHT J628 1 149271 e ES 5 BLK 2 CONTROLS q HCPL 0631 605 Turn on Drive Enable Jo 5 INV OFF POST Ki 511 B i Low Disabled RED HE spare 0699 3032 OS g 1251 3305 EY E luk 8 lt 8 8 783 35938 5 E Break before make circuit 1 5 8 gt 58 0619 6 Dean SS vec 1906 0358 ET Ste e t 10508656 Ee VW 8 g 32 Q Tova Not Loaded xc 2 oTo se E S8 ta Qu a o Negative edge tigger CXT mer 636 J 2 12V GND 3 65K B E 0699 4417 0 g SE
40. see SHIFT OUTPUT TTL STATE ON ENTER Figure 4 10E D A11 9164 11 Negative pulse referenced to D common Trigger In Troubleshooting Connect an oscilloscope to the Trig Out BNC and Check for a trigger output pulse every time the enter the following front panel commands Trig In BNC is shorted see Figure 4 10E SHIFT OUTPUT TTL STATE ON ENTER TRIGGER CONTROL INIT CONT ENTER TRIGGER CONTROL TRIG SOUR EXT ENTER Then short the Trig In BNC pull low If no output is observed trace the signal from the A8 DSP board at A11 U165 12 Negative pulse referenced to H common A11 U157 12 U165 13 Positive pulse referenced to H common A11 U165 12 U164 10 Positive pulse referenced to D common A11 U164 11 Negative pulse referenced to D common RI Remote Inhibit Troubleshooting ER geg Al VOLTAGE VOLT 100 ENTER OUTPUT ON 100 Vac at the output terminals Short the RI terminals together J113 3 to J113 4 PROT annunciator comes on 3 If the output does not disable trace the signal from the A8 DSP board at the following locations Normal Shorted 1 1 1 1 All U165 6 LOW HI All U161 5 HI LOW DFI Discrete Fault Indicator Troubleshooting 1 Connect a 5 Vdc source to the DFI terminals via a See Figure 4 10F 5K resistor 2 Connect a controller to the GPIB connector and send the following GPIB commands OUTPUT 705 OUTP DFI ON OUTPUT 705 OUTP SOUR QUES OUTPUT 705 STAT QUES ENAB 512 42 Troubleshooting 4
41. sheet 4 of 10 XDC0 2 XD R1714 R1715 10 10 xD 6 LE RINS C1707 xD 5 R1710 R1711 10 10 10057 Wy GxDC R1708 R1709 10 10 50 SEES BXD 6 10 10 XDC3 R1206 R1207 Se R1704 R1705 10 10 50 2 C1703 100 NOR TER R1202 R1703 10 10 5 R1700 ER 080 BXD 3 xD 0 C1701 10 10 BxD 2 01200 UU BXDC12 En BxD 0 BxD 0 7 SHT 6 7 8 9 12DAC 0 8 12DAC 8 R1732 RAS 10 10 12DAC 7 R1730 Rhee C1716 10 10 1208 6 R1728 R1729 Ser 10 10 5 1208 5 R1726 R1727 R1724 R1725 10 10 50 ALI sur 6 9 1208014 AAA AAA 1715 100PF E R1722 R1723 10 10 I Y 12DAC 3 MN AAA C1712 10 10 1000 12DAC1_WR 15006 2 R1720 R1721 TN E 10 10 TOPE 12DAC2_WR SHT 6 SHT 4 12086 1 R1718 R1719 10 10 1 12DAC3_WR 1 Nee Nyaa C1709 E 100PF 10 10 504 ER C1708 100PF SHT 9 Ed 50 12DACS_HR 100 5 12DAC6_WR 8DAC 0 2 8DAC 2 R1738 1739 R1736 R1737 10 10 8DAC 1 AAA AAA C1219 8DAC 0 BADC 0 3 8ADC 3 8ADC 2 88DCC1 R1734 R1735 10 10 C1718 100PF 500 R1746 R1747 8ADC 0 8DAC_LD 8DAC_CLK 5 6 8DAC_SDI 8ADC1_WR o 8ADC2_WR SHT 7 8ADC1_RD BADC2_RD 168DC 0 8 16A
42. u Ro 3 so VEE lt 8738 55 8 NE 0699 3947 esc xl ss gee gt ss 7 lt x 672g g 22258 gf 0610 YS 3 1820 5859 WER T Pulse Width 1 e e e e 5 CLR Q 7ON 01 um on Pulse Wi Tw m 2 8 R67 P LA ok ES E R642 0699 4009 14 exr HL 10K p 0699 3970 P 8 5 Y C653 Figure 6 15 Inverter Assembly Schematic Diagram sheet 2 of 2 002d
43. 16 inch flat blade screwdriver 7mm and 10mm Hex drivers 5 8 inch Hex driver or box wrench Static free workstation and antistatic wrist discharge strap Top Cover outer cover Removal a Using a T25 Torx screwdriver remove the screws holding the carrying straps on each side of the AC source Total of 4 screws To remove slide cover toward rear of unit to disengage it from front panel spread bottom of cover to lift it from the unit When replacing the outer cover carefully align front of cover with front frame and rear bottom corners with rectangular blocks mounted on the chassis Inner Top Cover Removal a b Using a T15 Torx screwdriver remove 4 screws holding the top of the inner cover 3 screws holding the left side and 4 screws holding the right side Lift the inner cover straight up and off the unit A1 Front Frame Panel Assembly Removal and Replacement a b Remove the top cover as described earlier Locate and carefully peel off the vinyl trim strips one on each side of the frame to gain access to the side screws the secure the front frame to the chassis Using a T10 Torx screwdriver remove 2 screws from each side of the front frame Move the front frame forward a few inches and disconnect the phone type cable from connector A1J6 located on the front panel PC board Move the right side of the front frame forward pivoting on the left corner to gain access to S1 on off switch Disconnect t
44. 22 D i Dcao 0 19 DC18 DC12 DC16 DC15 DC14 0 13 DC12 DC11 DC10 D 9 D 8 D 2 D 6 DCS D 4 DC3 D i DC1 D 0 0710 TMS320C31 lt O O Ne fu jon D t HI p re t SUSEC R722 R723 R721 20K 20K susEC 4724 1 5 2 3 A MCBL MP s e 2 D EMU y Hac 11 emue 125 1 13 En o EMUO ari TEST HEADER TCLKO NC R251 SUSEC SHZ NC A OAS 5 0 NC R786 CLKXO NC 20K CLKRO TIC NORM EMUL FSRO figg NC DRO NC INTZ INTZ INT2 INT2 INTI INT1 INTO INTO TACK NC SEI RESET R W EE STRB STRB RDY RDY HOLD HOLDA NC xi x27 CLKIN 1 H1 45USEC SUSEC 5USEC NORM EMUL TSUSEC A C720 5USEC 1000 50 WR gt m gt SHT 3 NURRM CS R W STRB SH o TIC SHT 4 INIO RAM H CS SHZ SUSEC C721 20 1000 5 0214 PRLCE16U8 1 AC23 Tibe LACER 19 1 07 acea 3 18 21 12 1 06 Geen 513 1 05 RDY 1 04 I5 I 08L NC nes a I6 I 028LL7NC Sohn ef I 01 H5 NC STRB 1118 1 00 NC 19 0E GND R787 4 6
45. 2330 INDUCTOR L509 All 5080 2368 INDUCTOR RESON L512 513 All 9135 0481 INDUCTOR CM L514 All 5080 2461 INDUCTOR P527 All 5080 2351 CABLE P537 All 5080 2346 CABLE P544 All 5080 2363 CABLE P545 All 5080 2350 CABLE Q501 502 All 1855 0665 MOSFET RFP 2NDL R502 All 0698 3547 RES 1 5 5W CC R503 565 576 577 All 0811 1832 RES 5 1 3W PW R506 507 512 515 0683 1065 RES 5 25W R508 509 566 567 0699 1060 RES 05 1 3W 60 Replaceable Parts 5 Table 5 8 Output Board continued R510 6811A B 06811 80006 RES SHUNT W PIN R510 6812A B 6813A B 5080 2383 RES SHUNT W PIN 6841A 6842A R511 543 549 0699 0222 RES 10 5K 1 R520 R523 0698 3152 RES 3 48 1 521 522 0757 0414 RES 432 1 125W R529 R530 0698 6414 RES IK 1 1W 531 536 539 542 0699 1743 RES 345K 1 R532 533 All 0699 1741 RES 5 657K 1 R535 All 0699 4307 RESISTOR FIXED R537 544 546 595 596 All 0757 0401 RES 100 1 125W R547 6811A B 0757 1100 RES 600 1 125w R547 6812A B 6813A B 0698 4463 RES 845 1 125W 6841A 6842A R500 501 592 593 All 0698 3260 RES 464K 1 R550 555 558 559 All 0698 8826 RES 825K 1 R551 554 All 0757 0279 RES 3 16K 1 R552 553 All 0698 3156 RES 14 7K 1 R560 All 0698 OG64 RES 9 31K 196 R568 0698 3609 RES 22 5 2W MO R571 572 0699 3420 RES 56K 5 5W R573 574 0698 3279 RES 4 99 1 125W 575 0698 4446 RES 267 1 125W 569 0757 0407 RES 200 1 125W R578 0698 3430 RES 21 5 1 R579 580
46. 40 or 80Apeak out 14 msvottage prog common 12 V RMS PROG OV OV out 3V 300V out ALC RTIME always 4 9V waveform DC offset i d d icd aT LO g C bias common pms current common OV 0A out 4 99V 13A I RMS PROG out 4 99 to 0V WFDC PROG 425V to 425V out P watomampl common OV 0V out 300V out WFAC PROG 5 to 4 99V ac dc current monitor full current output 5 to 4 99V ac dc voltage monitor 425Vdc or 300Vac 15 13 E 39 4 Troubleshooting Table 4 9 Voltage Measurements at J821 viewed from circuit side of A10 control board range signal pin pin signal og h swaf a fa osom C C 5 5 o 29 normally hi low true RESET INPUT RELAY 1 5V 10 seconds after power on ALC EXT hi output disabled 2 mV pulses hi PROT CLEAR meh Ten searen C EA ET E ENB Y T T E IM 0 T T R common 010 RMS low RTIME hi pulsing low true normally low hi true OVP FAULT CV LEVELING RMS hi RTIME low 40 Troubleshooting 4 A9 Output Filter Relay Assembly Troubleshooting TURN UNIT ON CONNECT OSCILLOSCOPE PROBE TO 500 OBSERVE WAVEFORM NO CHECK U506 AND ASSOCIATED S lt NAVEFORM OK gt N SEE FIGURE CIRCUIT COMPONENTS P d YES PROGRAM VOLT 300 OUTPUT ON
47. 400Hz 298 200 301 800 Front Panel Display Vrms 400mV Vrms 400mV 1 2mV 300Vrms 1KHz 296 700 303 300 Front Panel Display Vrms 700mV Vrms 700mV 1 2mV CV Load Effect Vout 1 5V Vout 1 5V CV Line Effect Vout 0 3V Vout 0 3V rms Current Readback Front Panel Display High Range Io 0 0175A 10 0 0175 Front Panel Display Low Range Io 0 0045A A 10 0 0045 ImA Total Harmonic Distortion Front Panel Display 1 Frequency Programming amp Readback Accuracy Program 400 Hz 399 960 Hz 400 040 Hz Front Panel Display Fo 0 040 Hz Hz Fo 0 040 Hz DC Voltage Programming amp Readback Accuracy 425 VDC Output 424 075 Vde Vde 425 925 Vdc Front Panel Display Vo 0 363 Vdc Vo 0 363Vdc 425 VDC Output 424 075 Vdc Vde 425 925 Vdc Front panel Display Vo 0 363 Vdc 0 363 Vdc Note 1 Measurement uncertainties are only valid when using test equipment listed in Table 2 1 2 Voltage Programming and Readback measurement uncertainties for 3458A DMM in the 1000 volt range 3 Measurement uncertainties in parenthesis are only if a 30 1 ratio transformer is used with the 3458A DMM 14 Performance Tests 2 Table 2 10 Performance Test Record Agilent 6812A B 6841A Model Report No Date Test Description Minimum Results Maximum Meas Specification Specification Uncert Voltage Programming amp Readback Accuracy 300Vrms 45Hz 299 250 300 750 Front Panel Display Vrms 190mV Vrms 190mV 1 2mV 300Vr
48. 5060 3570 5062 3705 5080 2328 5080 2329 5080 2339 5080 2341 5080 2342 5080 2348 5080 2353 5080 2356 5080 2362 5080 2365 5080 2373 5080 2380 5080 2381 5080 2397 5062 3977 5062 3983 7120 8214 7121 2794 9100 5145 8120 5573 8120 6502 8120 5568 8120 5566 8120 6505 8120 6505 8120 6511 CHASSIS TOP PANEL REAR BRACKET FAN FET CLIP BRACKET DC RAIL SAF CVR AC INPUT BLOCK TOP COVER AC SAFETY COVER FOOT CAP STRAP HANDLE CAP STRAP HANDLE CHASSIS ASSY STRAP HANDLE CHOKE LINE CHOKE RAIL LABEL REAR PANEL XFMR INSULATOR INSULATOR CABLE ASSEMBLY CABLE ASSEMBLY CABLE ASSEMBLY ASSY FAN CABLE INSULATOR INVERTER CABLE ASSEMBLY CABLE ASSEMBLY CABLE ASSEMBLY RACK MOUNT KIT without handles RACK MOUNT KIT with handles LABEL WARNING LABEL ID SN XFMR SWITCH POWER PWR CORD OPT 831 PWR CORD OPT 832 POWER CORD OPT 900 POWER CORD OPT 901 POWER CORD OPT 902 POWER CORD OPT 912 POWER CORD OPT 903 918 POWER CORD OPT 904 POWER CORD OPT 917 POWER CORD OPT 833 POWER CORD 834 POWER CORD PLUG OPT 841 POWER CORD PLUG OPT 841 POWER CORD OPT 842 POWER CORD PLUG OPT 844 POWER CORD PLUG OPT 845 POWER CORD PLUG OPT 846 POWER CORD PLUG OPT 847 POWER CORD PLUG OPT 848 53 5 Replaceable Parts Table 5 2 Parts List for Technical Manuals 5962 0885 REFERENCE CARD 5962 0829 IDE USER 5962 0883 IDE QUICK START ENGLISH 5962 0889 IDE PROGRAMMING 5962 0837 IDE QUICK START FRENCH 5962 0839 I
49. 6 27 Thermistor Assembly Schematic Diagram 64 114 114 AC FET Assembly 3090 2349 A2 GPIB Mama J115 66000 6005 5080 2361 Assembly 4312 5080 2281 aM 112 A11 Trigger Assembly E5012 E1051 J1042 A8 DSP Assembly A4 AC Input Assembly Thermistor Assembly E1355 Power XFMR Assembly 5080 2366 5080 2367 41232 A9 Output Filter Assembly 5080 2359 5080 2354 Line Choke 5080 2328 A10 Control Assembly 5080 2358 DIN Connector 5080 2397 Rail Choke J524 Ab DC Rail Assembly 5080 2353 5080 2363 5080 2348 A6 Blas Assembly 5080 2360 5080 2364 5080 2358 J6 Line Switch A1 Front Panel Assembly Figure 6 1 Interconnect Diagram 36V 544 Ke S45 5 59 Xr 510 5 RS Si 555 5 519 5 S26 re 537 re Figure 6 2 Front Panel Assembly Component Locations
50. A9 output assembly 37 4 Troubleshooting A8 DSP and A10 Control Assembly Troubleshooting WARNING When troubleshooting the A8 DSP board and the A10 Control board disconnect the 500V dc rail between the A9 Output board and the A7 Inverter board by disconnecting the cable from J627 Also place an insulator over the DC Rail board NOTE To troubleshoot the A8 DSP board and the A10 Control board it is recommended to use the extender board from Service Kit 5063 2330 The extender raises the A8 and A10 boards from the unit to access the J822 J722 and the J864 connectors Table 4 7 lists the general troubleshooting procedure analog voltage levels or digital signals can be generated using the front panel keypad Use an oscilloscope to easily distinguish the ac rms measurements from the dc measurements Tables 4 8 and 4 9 describe the expected input output signals between the DSP and the Control boards Table 4 7 DSP Control Assembly Troubleshooting With the cable to J627 disconnected To check the J822 analog voltages enter the following J822 31 3 8 Vdc J822 32 0 8 Vdc commands from the front panel J822 23 1 0 Vac J822 22 5 0 Vdc VOLTAGE VOLT 300 ENTER OUTPUT ON J822 15 4 0 Vdc J822 20 15 0 Vdc J822 13 6 0 Vdc J822 18 15 0 Vdc 822 9 2 5 Vdc J822 16 1 5 Vdc J822 5 3 0 Vac 822 12 5 0 Vdc J822 1 0 Vac J822 10 6 0 Vdc J822 8 5 0 Vdc J822 6 6 0 Vdc VOLTAGE OFFSET 425 ENTER OUTPUT ON J822 9 4 6 Vdc for 425 Vou
51. BE CONNECTED TO GROUND K NY Figure 6 3 Intelligent Front Panel Assembly Schematic Diagram sheet 1 of 2 50 56 5UF C1 C6 Ce C10 C14 C15 C11 C21 50 5 5 500 500 500 5 3300PF 3300PF 3300PF 3300PF 3300PF 3300PF 3300 Pa U4 U16 U17 U15 U10 U13 zs SCH 3300PF 37 Uta 36 V z5 20 34 1 50 26 61 18 G9 10 UF_DATA ee 31 PK 35 62 17 610 9 39 29 34 63 16 611 40 25 28 64 15 7 es 41 e UF_BLANK ee 24 27 65 14 6515 6 64 48 35 PO 2 66 15 614 5 43 3300PF 3300PF UF_CLOCK M _ ms 24 Ui UZ UF_LATCH 25 68 11 616 3 PME 36 46 58 W 21 8 7 5 1 4 1 2 3 5 K ESD GROUND 5300 INPUT RF GROUND D DIGITAL GROUND UF UF GROUND 56 A LE NC Im 1 R45 R46 4 6 81K lt 6 1 UF_PWM 104 1x 1 e _jBAs28 1W EI 4 R41 R42 50 25 6 81K Po 1x 1x Em AH ET 16 3300PF UCC los ca4 UR17 010 L 55528 P SUM 6 MHZ e 9 4 200 Po g P1 02 CEP PE GND 8 R43 R51 R44 2 2 5 1 84 Figure 6 3 Intelligen
52. K1040 150 F1020 4 r S t t t t NOI t L1060 F1080 RRIL C1010 t t gt X J1049 Q 1000PF M4 UNPL R1060 4 01013 C1014 c1015 4 1020 3 Te M 4700PF 01091 Sik 2 Ac temm R1010 250 9 QU E 1050 2 1M 1 1 1 2500 2500 1104e 1 C1051 1052 2 3 FET AC 1061 281061 1065 1065 1067 Faces C1021 nk R1082 TP1050 1 12 AWG pe 5 SNZDS1080 2 619 E L1061 RRIL 4 rm J1047 2 J1047 1 adt 608 oo DO 1047 M6 M4 UNPL INPUT_RLY_ISO TO BIRS PCB AC_SWITCHED1 Figure 6 9 AC Input Assembly Schematic Diagram RAIL LO FAULT LO Wi RAIL LO WARN LO RAIL PCLR ISO 5V RAIL FAULT LO RAIL LO 9 e oad 1444 ED LE 616300 S Ez od go Exe E43S 4 25 1 0 arze nq42q i350 T Q 4 4 gt re Q C3 C 4000 9 E 6415 9 _ 5 EN3S 3 E 3S S E430 4 EX24 TO OEx24 S 9 Q Q Q Q lacs _ Raae 0000000 ENS 9 nt LC SE Oo 4 HEST GO OJO HICK WE 4 oww o D 9458 CNT8 o aval Olb 0T 445 5 olbq0S are qr REL 4 olb
53. RELAY SENSE RELRY ISENS ISENS IL SENS IL_SENS NZD501 1N4150 15U SEC ZND502 1N4150 5 p ORLY DRU SRL Y DRU R530 15U SEC R596 100 C576 047 500 INV_PCLR C540 150 1 1 1 10 SEC R537 5541 042 R544 R579 lt R580 100 1 1 3435 15U 6820 SEC 1 15PF 1 104 1000 15U SEC R545 100 Gane R551 C553 AAA P N C549 15 047 1000 500 R549 R539 R540 R531 ANV NNV USENS z45K 1x 345K 1 345 17104 1710 12108 USENS C554 7 dou we R541 R542 R526 L ANN ANN AAA en B45K 1 345K 1 S45K 1x 17104 17104 12108 SRLY_DRVU U_MON_RET T_MON_RET NP U MON 1 I L MON I L MON RET Figure 6 21 Output Assembly Schematic Diagram sheet 2 of 4 W GY BR T 1 URRIL R584 3 6K 5x 500 C510 C508 2200 320 PF 5000 16000 R586 0 3 6K 5x D R587 3 6K W GY R BLRCK URRIL Figure 6 21 Output Assembly Schematic Diagram sheet 3 of 4 TO CONTROL BORRD 4524 64 32 65 51 62 30 61 99 60 28 59 27 58 26 57 56 24 55 25 54 22 21 52 20 51 19 150 18 49 17 48 16 47 15 I MON I MON RET
54. V C493 0160 4805 CAP 47PF 5 100V C494 0160 4822 1000PF 5 C496 497 0160 4824 CAP 680pf 100v D400 407 1901 1543 DIODE D416 419 1901 0731 DIODE 1N4004 10G04 D420 475 1901 1098 DIODE IN4150 D423 1902 0951 DIODE ZENER DS400 1990 0517 LED VISIBLE E430 1 2 3 4 1251 5613 CONN SGL CONN E432 5080 2354 CABLE E454 1251 0600 CONTACT CONN M HS400 402 404 406 407 1205 0298 HEAT SINK J400 1252 2503 CONN POST TP HDR J436 1251 8606 CONN POST TP HDR J444 1251 5980 CONN UTIL J445 1252 1707 CONN POST TP PST Q450 491 1855 0727 MOSFET 2N7000 Q475 476 1854 0477 XSTR NPN 2N2222A R1408 0698 3499 RES 40 2K 1 R1409 0757 0465 RES 100K 1 R400 401 406 407 0699 3196 RES 150 5 10W R403 404 0811 1914 RES 5K 5 10W PW R408 410 0811 1708 RES 7K 5 5W 5PWI R412 0811 1826 RES 05 10 3W R413 0812 0050 RES 3K 5 5W PW R414 425 449 0698 3279 RES 4 99K 1 R415 420 0698 8672 RES 243 4 1 R416 419 422 0757 0281 RES 2 74K 1 R417 418 421 469 407 8159 0005 RES ZERO OHMS 1417 1418 R423 0698 3637 RES 820 5 2W MO R424 432 493 0757 0199 RES 21 5K 1 R426 427 429 451 459 471 0698 3155 RES 4 64K 1 1401 1405 R428 463 0757 0446 RES 15K 1 125W R430 0698 8827 RES 1M 1 125W 58 Table 5 7 DC RAIL Board continued Replaceable Parts 5 Reference Desig Applicability Agilent Part No ELECTRICAL PARTS R431 R433 R434 435 R436 R437 R439 R440 444 450 458 1415 R441 R445 R446 R447 R448 R452 R453 R454 R456 468
55. check for the correct voltage as follows Press 0 and 9 simultaneously Press A twice once and ENTER Press 0 and 9 simultaneously Press A once Enter a fan speed then ENTER and and and and and and and and and and and After the fan speed test enter the following command SHIFT OUTPUT ENTER This restores the fan speed to automatic mode Check F301 If open replace fuse If fuse blows again troubleshoot the bias circuits 12 12V PRI to A4 Input board 15 Vde 15V PRI to FET board 12 to 15 Vdc 5V UNREG to U311 U312 5 Vdc 5VDC to AI Front Panel 5 Vdc 5 DC to A2 GPIB board 15 Vdc 15 to A8 DSP A9 Output A10 Control boards 15 Vdc 15VSEC to DSP A9 Output A10 Control boards 25 to 30 Vdc 425 V UNREG to A7 Inverter A8 DSP boards 5 V 5 V SEC to A7 Inverter A8 DSP boards 22 Vac 22Vac to dc rail bias regulator 44 Vac 44Vac to dc rail bias regulator 4 7 Vdc in AUTO mode EE INIT lt model gt FAN MODE MAN EE INIT lt model gt FAN SPEED lt n gt 10 5 7 Vde 50 9 6 Vdc 100 14 6 Vde 31 4 Troubleshooting 55 ATOAGASSY TOULNOD 4 iiie ever 95 9 Sri occur 02 29 95 7297 ASI 1 OV A ATNGSSY LNO Figure 4 6 Bias Assembly Voltage Distribution 32 Troubleshooting 4 AT Inverter Assembly Troubleshooting
56. isumu 5Y R497 15UINU 10URAIL REF 1 0476 eege 100 24 DIC 497 2050 GND _ PGND C484 R482 222229 10 100U 200 R483 te S 00 R489 3 65K 1 H Mi Figure 6 11 DC Rail Diode Assembly Schematic Diagram sheet 3 of 3 12 25 30 341 2 2 e1pzo ejpsos e1C203 olczo us 4 a Hie 9 E346 2 a e ces g a 2EZE1 ab to Q i 0321 92324 o 0325 E Poses fe 145 9 OOOOOO o 5 Vde 15 e F326 Figure 6 12 Bias Assembly Component Locations HPIB ZALF BIAS DO NOT Pot IHS311 PRI1 T301 F311 D362 AC SWITCHED 2 AC SWITCHED 1 M4 UNPL FRONT PANEL BIAS F301 2A PRIMARY BIAS INPUT RLY ISO F300 D300 SSeS 3A 1259 UNSWITCHED J355 Ezz4 1 RC SHITCHED 1 RC ACC GNDP 12UPRI DB p INPUT RLY ISO INPUT BD 15 CONNECTOR 15UPRI 4559 RC FET BD CONNECTOR Figure 6 13 Bias Assembly Schematic Diagram sheet 1 of 2 PRI1 1 T300 AC SWITCHED 1 AC SWITCHED 2 5
57. pin 20 63 6 Diagrams List of Figures Figure 6 1 Figure 6 2 Figure 6 3 Figure 6 4 Figure 6 5 Figure 6 6 Figure 6 7 Figure 6 8 Figure 6 9 Interconnect Diagram Front Panel Assembly Component Locations Front Panel Assembly Schematic Diagram 2 sheets GPIB Assembly Component Locations GPIB Assembly Schematic Diagram FET Assembly Component Locations FET Assembly Schematic Diagram AC Input Assembly Component Locations AC Input Assembly Schematic Diagram Figure 6 10 DC Rail Diode Assembly Component Locations 2 sheets Figure 6 11 DC Rail Diode Assembly Schematic Diagram 3 sheets Figure 6 12 Bias Assembly Component Locations Figure 6 13 Bias Assembly Schematic Diagram 2 sheets Figure 6 14 Inverter Assembly Component Locations Figure 6 15 Inverter Assembly Schematic Diagram 2 sheets Figure 6 16 DSP Assembly Component Locations 2 sheets Figure 6 17 DSP Assembly Schematic Diagram 10 sheets Figure 6 18 Control Board Component Locations 2 sheets Figure 6 19 Control Assembly Schematic Diagram 7 sheets Figure 6 20 Output Board Component Locations Figure 6 21 Output Assembly Schematic Diagram 4 sheets Figure 6 22 Trigger Board Component Locations Figure 6 23 Trigger Assembly Schematic Diagram Figure 6 24 Thermistor Assembly Component Locations Figure 6 25 Thermistor Assembly Schematic Diagram Figure 6 26 Transformer Assembly Component Locations Figure
58. the 6812A B and 6841A and another for the 6813A B and 6842A A5 DC Rail Assembly The A5 DC Rail assembly contains U447 the CV error amplifier U491 PWM driver U462 PWM comparator and U475 ramp generator to control the FET H bridge on the A3 ACFET assembly The chassis mounted power transformer connects the 42 KHz AC from the A3 ACFET assembly to input rectifiers D400 thru D407 on the A5 DC Rail board Chassis mounted rail filter 5080 2329 and capacitors C500 to C503 and C508 to C509 located on the A9 Output Filter board convert the 42 KHz AC to a 503 volt DC rail for use by the A7 Inverter assembly It also contains U423 bias voltage detector and high low 503 volt rail voltage detection circuit There is a red LED on the right side of the 5 DC Rail assembly to warn when high voltages are present this LED can be seen from the right side of the AC Source without removing any covers This assembly is component level repairable but extreme caution must be used when troubleshooting as 1100 volts peak 503VDC is present The A5 DC Rail assembly is common to all models 18 Principles of Operation 3 A6 Bias Assembly The A6 Bias assembly receives the AC input mains voltage via connector J1035 from the A4AC Input assembly The bias transformer primaries for models 6811A B 6812A B or 6841A can be configured for either 100 120 200 or 230 volt nominal input and models 6813A B and 6842A can only be configured for 200 or 230 volt nominal inputs T
59. the 6813A B and 6842A B use only 4 power FETs in the H Bridge These assemblies are component level repairable except for a FET failure Power FETs replacement requires that all FETs in the H Bridge have the same manufacture and same date code therefore when a FET replacement is required it may be more practical to replace the ACFET assembly The 6811A B 6812A B and 6841A use one common assembly the 6813A and 6842A use a different unique assembly A4 AC Input Assembly The AC input mains voltage is connected on the rear panel via J1049 to the A4 AC Input board The AC input board converts the AC mains to a nominal 320 volt DC rail for use by the AC FET assembly Relays K1040 and K1041 prevent the DC rail from energizing until the front panel on off switch closed Resistors R1040 R1041 R1045 and R1046 limit turn on surge current to the input filter capacitors C1060 thru C1067 Relay K1040 bypasses the current limit resistors when energized Relay K1040 is controlled by FET Q1040 who is driven by the input_rly_iso signal derived from the DSP assembly Wire jumper J1047 connects the full wave bridge rectifier D1060 and input capacitors C1060 thru C1067 as either a voltage doubler for 120 volt mains or full wave bridge for 220 240 volt mains Fuse F1020 is the main AC line fuse and F1080 protects the 320 volt DC rail to the AC FET assembly The A4 assembly is component level repairable and there are 3 unique assemblies One for the 6811A B another for
60. 0 27 BADC 1 Dco 28 135 BADC 0 3 DC8 29 07 _ 50 55 SUSEC Dc6 3 DCS 32 126 16ADC 8 SHT S 16ADC 7 C741 74 pcz 34 168DC 6 DC2 35 168DC S 000 1000 D 55 500 500 16ADC 4 C737 Dio 37 16ADC 3 16ADC 2 1000 1 47 168DC 1 44 500 2 46 16ADC 0 168DCC0 8 UPP 3 SUSEC 0755 21 AM27C2048 __ 20 38 55 Rom_cs 30 98 DIGIN 15 ETE OE 60 45 pc DIGIN 14 aue les ni V 100 49 DIGINCIZ A16 50 DIGIN 12 aas mad 215 140 51 DIGINCI1 5 DC14 A14 D14 52 DIGIN 10 A13 59 6 DC13 acie aa 0135 0127 55 DIGIN O aci 3271912 1 5 50125 55 89 DIGIN 8 A11 D11 56 88 DIGIN 7 AC10 36 9 DC10 A10 D10 59 87 DIGIN 6 aco 35 po i9 9 es INIT DIGIN S ACB pg Deg Se DIGIN 4 AC 31 EPROM 14 D 7 D 70 84 DIGIN Z 50 132 16 ZC 15 Drei 6 D6 DDS_DN 71 DIGIN 2 ACS 29 a5 ps 16 D S 75 DIGIN 1 ACA 28l a4 p4 12 Dee 75 74 DIGINCO DIGIN O 15 ACS 27 az 05 18005 aca 26 19 D2 R732 R733 273_CLK1 ne 02 94 AC1 25 01120001 N ACO 24 po et 0 106 C743 NC NC 107 E SUSEC NC nc 55 iig ROY BSY 100PF GND1 GG Se 50 120 our 4S5USEC 10 10 125 C244 127 159 BR 128 129 11055 130 138 40 143 42 144 44 lt nA D 0 31 19 41 61 77 101 123 129 158 SHT 2 3 Figure 6 17 DSP Assembly Schematic Diagram
61. 0 220Vac Assembly Assembly Assembly Filter Relay 45Hz to 1KHz Assembly 425VDC Main Input Line A8 Digital Signal A6 Bias Assembly Processor Assembly ontrol Assembly Switch EN A1 Front Panel Assembly DFI RI TRIG OUT TRIG IN Power Bias Signal e Figure 3 1 AC Power Source Analyzer Block Diagram 20 Troubleshooting Introduction WARNING SHOCK HAZARD The troubleshooting procedures in this chapter are performed with power applied and protective covers removed These procedures should be performed only by service trained personnel who are aware of the hazards e g 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 AC Power Source Before beginning troubleshooting procedures make certain the problem is in the AC Power Source and not with an associated circuit the GPIB controller or AC input lines Without removing the covers you can use the verification tests in Chapter 2 to determine if the AC Power Source is operating normally Test Equipment Required Table 4 1 lists the equipment required to perform the troubleshooting procedures given in this chapt
62. 0 5 0321 ECONDARY BIAS 1250 R325 ANV F326 TO INVERTER NOT USED E336 2 TO 15 SECONDARY BIAS 70352 144150 UR352 UN TS V DO 2 R322 LOAD 0 TI FAN REG R351 4 64K 29391 IHS351 R354 Sem 1 TIP122 CH FAN J343 C361 D351 0 i Fix 2 200 350 UR351 R i 2 5 047 10 0554 3 j1 e MC328 524 500 DIODE RRIL 13337 IHS3P2 U322 LM312T_ I 5 R326 C325 243 4 Ax 50 1 0UF wilo gw AA RN C327 el 550 155 155 15USEC GNDY GNDY GNDF INPUT RLY FRN PROG IN 1 200 500 500 a MC327 1 06 ii dE Uses 2 3 R328 2 74K C329 R329 243 4 Ax INPUT RLY ISO ex 15UPRI INPUT RELAY DR R330 1 sx 1744 1C331 4 7 359 LM337T FAN VOLTAGE NC 5 INPUT RLY INPUT RLY GRD NC INC OUTPUT BD CONNECTOR m 1 1 1 1 Figure 6 13 Bias Assembly Schematic Diagram sheet 2 of 2 J638 m
63. 02BCP IC COM LM339N OPTO ISOLATOR OPTO ISOLATOR OPTO ISOLATOR IC 34072 IC IC LM311 PRGMD GAL DIR IC MM74HC123N IC REG TL598CN WIRE 22 59 5 Replaceable Parts Table 5 8 Parts List for Output Board C500 503 0180 4649 2500 uf 300V C506 0160 7197 0 33 uF 630 V C508 516 0160 7640 C F 330 pF 1600V C533 534 541 544 0160 5422 047 uF 20 C540 543 0160 4803 68 pF 5 IOOV C542 554 0160 4795 4 7 C545 547 0160 4814 150 pF 5 C546 0160 4825 560 uf 100V C548 549 575 576 0160 5422 CAP 047 uF 20 C550 6811A B 0160 4824 CAP 680 pF C550 6812A B 6813A B 0160 4809 CAP 390 pF 100V 6841A 6842A C553 555 0160 4789 15 pF 5 100V C556 557 0160 4819 2200 5 C564 565 0180 4136 10uf 20V C568 569 0160 7934 2 uF 300 vac 2 C570 0160 4918 022 uf 10 C571 0160 4835 CAP 1 uF 10 50V C578 579 580 0160 5422 0 047 uF 20 D501 502 1901 1098 DIO IN4150 E525 All 0813 80005 CABLE J524 All 1252 1052 DIN CONN MALE J526 527 All 1251 7616 CONN UTIL MT LK K500 See Rev C assembly replacement parts at end of table K501 0490 1405 RELAY 2C 12 VDC K502 503 0490 1961 RELAY 1 12VDC L500 501 6811A B 06811 80004 CHOKE L500 503 6812A B 6813A B 5080 2331 CHOKE 6841A 6842A L504 6811A B 06811 80005 CHOKE L504 505 6812A B 6813A B 5080 2332 CHOKE 6841A 6842A L507 508 All 5080
64. 060 1061 06012 80095 CHOKE OUTPUT Q1040 1855 0665 MOSFET 2NDL R1010 All 0698 8827 RES 1M 1 125W R1040 1041 1045 1046 All 0811 3932 RESISTOR FIXED R1042 All 0698 4150 RES 115 1 25W R1043 RIO44 0698 0092 RES 2 61K 1 R1050 0698 3620 RES 100 5 2 MO R1051 All 0811 1666 RES 1 5 2 PW R1060 1061 1080 1081 All 0811 1866 RES 1 5W PW R1082 All 0757 0418 RES 619 1 125W 54 Replaceable Parts 5 Table 5 4 Parts List for Bias Board C300 311 321 350 All 0160 4834 CAP 047 uF 1096 C301 328 All 0180 3298 C F 2200uF 50V C302 313 325 329 All 0180 0230 C F luF 50V C303 304 314 315 317 C326 327 330 All 0180 4129 CAPluf35V C312 All 0180 4137 CAP 1200 uf 35V C322 All 0180 4462 CAP 1200 uF 63V C323 All 0180 4398 470 uf 63V C324 All 0180 3458 CAP 4700 uF 50V C331 All 0180 4131 CAP 4 7 uf 35 V C361 All 0180 4136 CAP luf 20V D300 303 331 334 351 All 1901 0731 DIO IN4004 10GO4 D321 324 362 365 All 1901 1087 DIO PWR 856 D325 All 1901 0992 DIODE 40V 3A D352 All 1901 1098 DIO IN4150 E334 All 5080 2355 CABLE E336 All 5080 2357 CABLE E338 All 5080 2358 CABLE F300 322 323 All 2110 0688 FUSE 3AM 125V F301 All 2110 0002 FUSE 2AM 250V F311 321 All 2110 0685 FU SUBMIN 7AM F324 325 All 2110 0699 FU SUBMIN 5AM F326 All 2110 0712 FU SUBMIN 4AM HS300 311 312 322 351 All 1205 0350 HEAT SINK HS321 323 All 1205 0282 HEAT SINK J306 314 All 1252 1999 MOD PHONE RCPT J335 All 1252 2672 CONN POST TP HDR J337 All 1
65. 10K 1 10K 1 15V 82PF 500 R943 REF R951 10K I_PEAK_PROG T BASZB 6 20 R950 1K qum Wo Be pL 13 5 gt RED NOT 3300PF LORDED 500 0905 06211A IPCL TEST e I_MON 151 SHT2 3 4 2 Roso 951 Cose s 0904 I L MON Nli SHT1 3 G45 15V 0 1 3 5 6 500 0945 6 fie N 13 5 gt posee I PEAK ERROR AMP 10K 100K IPEAK_CNTL SHT1 R956 JUNCTION TEMP S Tik ERROR RMP C950 R1901 4 7 500 NNV JCT_LIM TJ Q R957 e 100 1 C1869 100 07 C963 0 047 500 3300PF 500 151 C954 LIMIT AMP R967 Coon 904 525 ts 14 SHT1 15V NOT 0 1 4 LOADED LOADED 500 di 121 Me 33002 13 R966 R268 pases R1821 10K AAA 100K A C1818 5 NOT JUNCTION TEMP ERROR AMP 95080 R1886 R1912 R1836 0 cigis HN NOT LORDED 1000PF 1k 5 JCT_LIM 959 4P SHT5 3 2 5 1000PF R1887 4 r S0U Sue 150 50412 s 13 5 CAP1_BUF V V Jive IM IM UL V SHT 2_ 905 1 e 1 CL_PEAK SHTS 6 ap Figure 6 19 Control Assembly Schematic Diagram sheet 4 of 7 50 C1820 CLOCK 0 047 OSCILLATOR 500 REG 554 Faute CU_LEVELING SHT6 CL_RMS _ SE UDD u983 3 OUT ENBL 8MHz 50 S 51859 C1821 STATUS GAL 21 5 0 047 R1860 50 50 21 5 R1904 0 e
66. 118263 me mesey 160875 cio reos civ E 982 569 gaj Moses cll ee Zb mezgi 596911 qmoces 85819 65813 sosom Jg 288 coDom Sq Gees amne lB B B ego Copal TO HOSBAN CH e a M AE 7285 Le S2 Eo 18584 o O G eo8s Lo B e cg 0106584 CO x b Dol zi 9 85 bo 39 D SLO E HESE z Un UD zu Eg x Arara E a 80813 0ZBN 0 DE 20 968123 S meses GP 28623 g E mge ceal Sg E t8690 M B g C esam tiv O E 686 CD M E 106664 3 St dbi deeg BAA 461 gt 8860m E 58681 A Hy 986000 of museo 86901 6r6a 19695 f ege 9862 0564 EP M2264 s z O crol ev6a OIL pum Leti eo ciate eco 9813 1696 osea D Ra Sa Merga E eggro M 6 cx E 019560 ossan 9 prp 19 gt essal 05410465 TOSTA 8 esta ceea HESE HH 2860 cuan Kei choy 87885 v D 988TA cho E 18901 GE mists sasta IDIBI8 Ooreon Fg ungzeo 9 21819 HHI ir 16560 Ie v 8e 2 E 3p ren m on GK c B 901008 9 00819981 a 0 meters 5 0097 Sg
67. 14 trigger board 113 schematic notes 63 116 self test 22 serial number 8 T test equipment troubleshooting 21 verification 9 test record HP 6811 14 HP 6812A 15 HP 6813A 16 HP 6841A 15 HP 68424 16 troubleshooting Bias assembly 31 Control assembly 38 DSP board 38 FET board 27 front panel 26 Inverter assembly 33 Output Filter Relay assembly 41 Rail assembly 29 RS 232 26 Trigger BNC board 42 troubleshooting GPIBboard 26 voltage programming 11 Agilent Sales and Support Offices For more information about Agilent Technologies test and measurement products applications services and for a current sales office listing visit our web site http www agilent com find tmdir You can also contact one of the following centers and ask for a test and measurement sales representative United States Agilent Technologies Test and Measurement Call Center P O Box 4026 Englewood CO 80155 4026 tel 1 800 452 4844 Canada Agilent Technologies Canada Inc 5150 Spectrum Way Mississauga Ontario 5GI tel 1 877 894 4414 Europe Agilent Technologies Test amp Measurement European Marketing Organisation P O Box 999 1180 AZ Amstelveen The Netherlands tel 31 20 547 9999 Japan Agilent Technologies Japan Ltd Measurement Assistance Center 9 1 Takakura Cho Hachioji Shi Tokyo 192 8510 Japan tel 81 426 56 7832 fax 81 426 56 7840 Techn
68. 1997 2000 Agilent Technologies Inc Printing History First Edition October 1995 Second Edition July 1997 Third Edition September 2000 Table of Contents Warranty Information Safety Summary Notice Printing History Table of Contents INTRODUCTION Organization Safety Considerations Related Documents Revisions Instrument Identification Manual Revisions Firmware Revisions Electrostatic Discharge 2 PERFORMANCE TESTS Introduction Test Equipment Required Current Monitoring Resistor Constant Voltage Tests Procedures 3 PRINCIPLES OF OPERATION Introduction General Description Front Panel Assembly A2 GPIB RS 232 Interface Assembly A3 FET Assembly A4 AC Input Assembly A5 DC Rail Asembly A6 Bias Assembly 7 Inverter Assembly AN Digital Signal Processing DSP Assembly A9 Output Filter Assembly A10 Control Assembly A11 Trigger BNC Assembly N E P 1 oo 60 NN 10 10 11 17 4 TROUBLESHOOTING Introduction Test Equipment Required Troubleshooting Hints Power on Self test Failures Run Time Errors Overall Troubleshooting Flowchart Front Panel Assembly Troubleshooting A2 GPIB RS 232 Board Troubleshooting A3 FET Board Troubleshooting A5 DC Rail Assembly Troubleshooting A6 Bias Assembly Troubleshooting A7 Inverter Assembly Troubleshooting Slow Start Procedure A8 DSP and A10 Control Assembly Troubleshooting A9 Output Filter R
69. 200 SHT1 e GAL 0951 RELAY 1518070 2 Le SENSE RELAY Eer gt 26 RESET PCLR 2 4 22 625 DIODE_R_PCLR 3 5 24 INU INHIBIT Srt INHIBIT 4 235 ZERO U SHT2 PROT CLEAR 5 7 RAIL_INH SHT6 RAIL_INHIBIT Ci 9 16 2 20 QUP FRULT ap DDS_DOWN AW m 1002 p12 RAIL_L_FAULT SHT6 RAIL_HI_FAULT 11115 mle RRIL H FRULT g 150 f 12 I9 15 ferez 1 5 1826 c1827 1 1 1 c1831 0 015 8 16 110 RAIL LO FAULT ole sal bey Bue I_L_MON 5 112 TOOPF 220 e20PF T22oPF e20PF e20PF e20PF Sage un i 500 500 500 500 500 500 500 500 115 i i L GRL20U8Q GND 46 19U REF 2 Dogz MODE 16 PROG R989 R854 5U 5U 4180828 AC_MODE Gren t INUERTER PERK WV R1810 R1807 LO RAIL 59 LEUELING MODEs 1M 4 7 46 4 DET DELAY 0989 IMON 10X SHT6 el SU R991 OU STICK IPCL 4 64K 4 64K IMON 10X SHT6 3 3 LM319 C1819 F 101800 91800 C987 iv OVER VOLTAGE CIRCUIT 2 C1823 1824 C1841 NY 50 0 047 900 50 QU 0 047 500 te 59 1857 R859 0 047 2 WN R1810 R978 500 0 4 7K 1 47 12 IPCL LM319 R979 3 48K C1840 6 19U 150 15u 02097 V Figure 6 19 Control Assembly Schematic Diagram sheet 5 of 7 siis I E MON IMON RDBK SPARE SWITCH UA_LIMIT
70. 24 11K 0699 3066 NOT LOADED R1877 AAA SHT4 U MON INU SHT4 6 C1845 1000PF 2 DRC REF 5 SHT6 15U 2_ SHT4 R1872 909 1 5 SHT5 6 e C1844 1000PF 500 150 ZL DRC PROG SHT6 R1878 AA 1K ZL_FDBK R1876 AA 1 83K je 0 047 500 SHT1 R1881 NOT LOADED ZR_DAC_PROG SHT1 6 159 ZR_FDBK Figure 6 19 Control Assembly Schematic Diagram sheet 7 of 7 TP 501 e e 05109 Ce csos e 5327 511 e a W GY BR e o o W GY R 99999609 C500 524 csi4 9 TP 502 Figure 6 20 Output Board Component Locations J527 L503 L501 TP 501 L500 0519 350 PF 1600U C513 330 PF 1600U R594 100 5x 174W R508 05 3W R567 05 34 R509 05 3W R566 05 3 R513 10M 5x 174W R512 10M 5x 174W U MON INU TP 502 z 2 13 LINES 2 amp 5 y R568 USENS USENS AV 55 5x ORLY DRU a ISENS ISENS lib GND REF ib OU STICK IL SENS b IL SENS Figure 6 21 Output Assembly Schematic Diagram sheet 1 of 4 OUTPUT
71. 251 8139 CONN POST TP HDR J339 All 1252 0063 CONN POST TP HDR J343 All 1252 0055 CONN POST TP HDR J353 All 1251 5439 CONN POST TP HDR L321 5080 2321 CHOKE OUTPUT Q351 All 1854 0828 XSTR NPN SI R300 326 329 All 0698 8672 RES 243 4 1 R301 All 0698 0085 RES 2 61K 1 R311 313 All 0699 0083 RES 681 1 IW R314 All 0699 1982 RES 1 055K 1 R323 All 0757 0279 RES 3 16K 1 R324 All 0757 0280 RES IK 1 125W R325 All 8159 0005 RES ZERO OHMS R327 328 All 0757 0281 RES 2 74K 1 R330 All 0699 0208 RES I 594 25 W CF R351 All 0698 3155 RES 4 64K 196 R354 All 0686 2225 RES 2 2K 5 5W R372 All 0757 0463 RES 82 5K 196 R373 All 0757 0419 RES 681 1 125W T300 6811A B 6812A B 6841A 9100 5143 XFMR BIAS T300 6813A B 6842A 9100 5144 XFNR BIAS T301 6811A B 6812A B 6841A 9100 5141 TRANSFORMER GPIB T301 6813A B 6842A 9100 5142 TRANSFORMER GPIB U300 311 312 322 All 1826 0393 IC LM317T U313 All 1826 0147 7812 340 12 0321 All 1826 2505 IC LM2576T ADJT U323 All 1826 0527 IC LM337T U362 All 1990 1074 OPTO ISOLATOR VR351 All 1902 0955 DIO ZNR 7 5V 596 VR352 All 1902 0957 DIO ZNR 9 1 V 5 55 5 Replaceable Parts Table 5 5 Parts List for Inverter Board Reference Desig Applicability Agilent Part No 5182 9003 Cable thermistor 5080 2699 Cable 3 wire 5081 4971 Cable 4 wire NOTE Earlier ac source models used a different through hole inverter board This surface mount inverter board assembly 5064 0110 is the recommended re
72. 4 adc 147 147 50 DIGIN B ASE C1743 220 147 147 500 DIGIN 9 de ees C1742 220PF 147 147 Sou P AED ee 1741 e 147 147 Sou breme A C1740 SC 147 147 500 reer 21776 R1777 BE Se 147 147 500 DIGIN 12 N AA N AW C1228 aber 147 147 Sou A DIGIN 14 R1772 R1773 C1737 Sie 147 147 Sou RE R1770 R1771 Sie 147 147 Sou C1735 220PF 5 220PF Sou R1769 Re 78lprers 10 10 DIGIN S Se SC C1733 R1796 5 4 100PF 10 de PCLR 0 1 500 Sou vce U760 B 887275 W I 273_ CLK1 ies mE BxD 0 3 100 0012 M R2782 R2783 5401 6 Z 152 BXDCZ 8 E S 10 10 05 2 DIGIN 6 BxD 4 13 D4 Q4 12 5 1791 5 gt 14155 osHS OI VW BxD 6 17 D6 Q6 16 iz U Bxoc7 18155 07119 15 0 GND 12 5 19 19 21 o V es R2784 62785151 25 NNN NYY 59 o DIGIN 2 01249 51795 Sr 10 100PF 0 1 5 500 PCLR DIGITAL E 1 CONNECTOR 273_CLK2 zs 1 2 U C BXDC1 4 5 d 5 m E V BXDCe 7 155 VW BxD 3 8 D3 9 4 gt 15104 04122 BXD 5 145 os 15 DISTS BXDC0 2 pe 46 01516 SHT 5 6 7 9 BXDC7 18 07 19 DTST2 R1798 R1799 WNW 10 10 SHT 4 DDS DH C1734 PCLR SHT 1 2 3 100PF 50 RESET SHT 1 2 4 Figure 6 17 DSP Assembly Schematic Diagram sheet 8 of 10 12UDSP
73. 470 499 1411 R457 R460 R462 R464 R465 R467 R475 476 R477 R478 482 484 485 R479 481 491 R480 487 1410 R483 489 R486 488 R490 R492 R494 496 R495 497 REF U463 T491 TP401 404 U416 U417 U418 U423 U424 U433 434 U435 U436 U447 475 U449 U462 U463 U464 U491 W400 0698 3159 0698 8807 0698 6369 0698 6614 0699 0721 0698 6977 0757 0419 0757 0420 0698 6376 0698 0085 0698 6392 0698 3700 0683 2255 0698 0083 0699 0486 0698 3430 0698 3486 0698 8816 0757 0462 0757 0274 0757 0467 0698 4479 0699 0070 0757 0280 0757 0472 0757 0442 0757 0407 0757 0434 0698 4486 0698 4446 0757 0273 0757 0427 0757 0401 1200 0639 06624 8009 1 1251 5380 5060 3212 1826 0122 1826 0527 1826 2341 1826 0138 1990 0732 1990 1502 1990 0429 1826 1533 1826 1437 1826 0065 5080 2405 1820 3673 1826 2343 7175 0057 RES 26 1K 1 RES 39K 1 RES 1 25W RES 7 5K 1 RES 33K 1 RES 30K 1 125 RES 681 1 125W RES 750 1 125W RES 200K 1 RES 2 61K 1 RES 22K 1 125W RES 715 1 125W RES 2 2M 5 25W RES 1 96K 1 RES 2K 1 IWF RES 21 5 1 RES 232 1 125W RES 2 15 1 RES 75K 1 125W RES 1 21K 1 RES 121K 1 RES 14K 1 125W RES 3 16M 1 RES 1K 1 125W RES 200K 1 RES 10K 1 125W RES 200 1 125W RES 3 65K 1 RES 24 9K 1 RES 267 1 125W RES 3 01K 1 RES 1 5K 1 RES 100 1 125W SKT IC 20 CONT XFMR PULSE POST TP HDR 6603 ASSY HS 317T IC 7805 340T 5 IC LM337T IC REG TL77
74. 4K R2 33 SUSEC C722 0 1000 5 PALCE16U8 1 noes H1 St ck I1 1 07 acea 312 r oeli8 ace1 4 TET 513 1 05 514 1 04 IS 1 03 AC gt a 16 1 02 R W 9 17 1 01 2 NC STRB 1118 1 00 NC IO 0E GND R788 4 64K 5USEC C723 1000 500 PRLCE16U8 H1 i I0 CLK SUSEC SUSEC UIRQ zi 1 02 INT3 RI 412 1 06 INT2 513 1405 INTi R224 R725 TIN2 614 1 04 INTO 4 64K gt 4 64 PCLR gt Is 1 03 NC I6 1 02 NC I 1 01 NC 1 00 NC 19 0E GND 10 XWSTRB RAM_L_CS Jan SH3 SH4 UIRQ RI 1 SHT 3 XF1 a TING gy SHT 3 4 RXAIRQ RXBIRQ 3 UCLK Figure 6 17 DSP Assembly Schematic Diagram sheet 2 of 10 NOTE THE LORDING OF R2760 R2761 R2764 QC0 18 DEPENDS ON THE RAM SIZE DO NOT SHT 4 LOAD ALL OR ADDRESS LINE 17 WILL BE DO NOT LOAD TIED TO 5USEC R2760 8017 R2761 CC 45USEC SUSEC C225 R2762 C226 C729 ACL RAM_L_CS 0 aca A 32 1000 1000 58 1000 acs E6 NURAM 05 UCC 50U 1 500 wee 500 SHT 2 UCLK U720 U721 0724 AC x HM628512 HM628512 DS1220Y aco EB REH H CS zais WEIS R u ais ie ES 256K HEU 2817 5 55 5 aaea 27 CS jg LRAM H CS n le
75. 6 0683 1215 RES 120 5 25W R268 0698 3572 RES 60 4K 1 R269 0698 4121 RES 11 3K 1 R270 All 0757 0424 RES 1 1K 1 R271 All 0757 0200 RES 5 62K 1 R272 All 0757 0442 RES 10K 1 125W R285 All 8159 0005 RES ZERO OHMS R299 All 0698 3646 RES 12K 5 2W MO RV200 All 0837 0442 VARISTOR T202 All 9100 4350 XFMR CURRENT T204 All 06624 80091 XFMR PULSE TB201 All 2110 0726 FUSE CLIPS U201 202 All 1820 8433 IC PWM IR2110 U203 All 1826 1343 IC REG TL431CP U204 All 1826 0138 IC COM LM339N VR201 All 1902 1377 DIO ZNR 6 19 V W200 All 8150 4697 WIRE 14 WH GY Table 5 7 Parts List for DC RAIL Board ELECTRICAL PARTS C400 405 0160 7640 C F 330pF 1600V C409 411 413 419 454 475 0180 4129 CAP luf 35V C416 0160 4834 CAP 047UF 10 C417 0180 3458 CAP 4700UF 50V C418 0180 4405 CAP 470 uf 50V C425 427 429 433 442 0160 5422 CAP 047 UF 20 449 453 465 468 57 5 Replaceable Parts Table 5 7 DC RAIL Board continued C426 444 473 0180 4136 CAP 10uf 20V C432 0150 0050 1000PF 80 C447 451 495 498 0160 5098 CAP 22UF 10 C448 0160 4799 CAP 2 2PF C452 0160 4808 CAP 470PF 100V C455 0160 4831 CAP 4700PF 10 C456 0160 4823 CAP 820PF 5 C459 0160 4810 CAP 330PF 5 C462 464 0160 4797 CAP 3 3PF C463 0160 4807 CAP 33PF 5 100V C476 480 0160 4795 CAP 4 7PF C477 478 0160 4787 C F 22PF 5 100V C481 485 0160 4904 CAP 6800PF 5 C482 483 492 0160 4835 CAP 1UF 10 50V C484 489 0160 4791 CAP 10PF 5 100V C491 0180 4131 CAP 4 7uf 35
76. 6075 6690 6075 6690 6690 008 ON 000 002 002 m 002 o S MEL G MEL G MEL 98 e e 0 ii 966 ob 9 67 13Wd A009 0 x 1 199 E Ove 2621 a lana koog Get 0 Gau 283 h T 7199 rode 9r L ZScL ar 9 67 H 29293 2 2293 13d A009 9 0 55 a L S os 8 6 55 Es 8 8 3 5 53 s fg 3 g Jo EI 1281 6690 1281 6690 2581 6690 1251 6690 85 8 BN E o WL 9 9 WL 9 WE 5 m VE pei Lose 2099 09 So NEIN Sab io 19261 19261 IN A0001 IN A000 5 39089 S 34089 1 mm 2895 1892 o 58 29769 A009 29769 A009 403a 1966 59667 i9 mam 00 w ops Mi 002 w BEA 69261 6961 192651 ee et 9 002 002 002 IN A0001 AA NN 9 91 91 91 44089 9099 5895 BOY S894 e tg 0894 1894 z894 2099 3 lt a S 992671 992671 HA8S2091dV HA8SZ091dV s ENO E 89261 892671 3 E 09 ea EZ lt E 1291 8 91 68261 6926 e lt 992671 Sosa 992671 HA8SZ091dV HASScO91dV v GU 021 0 66 0 66 QI RN SU 0416 T e o E 13 9 L d MES e Be Co 0 81 8 0 6600 01 2200 n 8 8 lt 1 lt 5 E 83g e 095 099 2 u g
77. 64 vice S922 9829 94 EJEN 620 dbdee diay amp ere Ia aed B de peda rn HBg Hai 849 d m ZIL aec HGH Gr Ha g R2796 C1783 8149 el ee C725 HESE dE AE e SEN OR 6 C716 1 PAPAS iga I 6 3 605 CO gt J C R2761 m N d R2795 C1773 deka 988 4peo A N O DN ro em N Oo ON TE4deES E bero defo 2129 LT 6 9 53 5 0649 sez gt gi Za bodhra d Za 2 d
78. 744 501 RAIL 01 GY Ta 3 1 1 R258 0224 E506 3 4 1244 E507 O 6 5 4 3 2 R246 1 MC2 D207 R237 DRIVE1 Se SS See SS ves q 4 7 R238 R239 Z 0208 4 75K ACER IXFMR1 DRIVE A T204 190 5 J200 2 3 NZD209 R240 R241 J200 1 1 K a R250 R227 DRIVE B i SE Arie DRIVE2 D E 26 1K 4 7 R252 R211 AAA e5u 80 15K 12 n R243 3 U204 R251 2 9 0 VREF 1000 14 t 15 SZ p COMPENSATION R252 1 44 1 42K A IXFMR2 DUTY CYCLE 562 DETECT 7 25 Figure 6 7 FET Assembly Schematic Diagram o o Ziel me ome 5 oQ Qe RER R1040 K1040 300 O C1016 9 Ge Q eck 11035 o n D c1064 c1066 41042 Q D ran dao E J1047 2 J1047 1 io Co o o o o m O C1061 C1063 C1065 1067 O aa K R108q 0 E1048 1 20927 R1081 Q R1061 1048 2 0V 150 Vdc O OC10800 TP1050 1 TP1050 2 Figure 6 8 AC Input Assembly Component Locations R1042 1 250 todd E1048 2 E1048 1
79. A16 A14 WE R H 14 10 ACIS 31515 ACS 31 ES ACS 86 iz ce leo CS 9014 5 Ma eio 5 Y AC12 2 a2 22 7 18 E11 AC13 28 215 AC11 23 Alt 12 4 ate RAM RAM 10 21110 AC11 25211 912 8 11 25 512Kx8 09 24 9010 25 10 A8 25 eco 26 acs 36 AC po 22 DO aca 27 ag ACB EAP ACE alas 18 De AC Slay p gt 2i DC15 21 DC21 ACS Slas pos EZ Ds ACE po 20 0014 6 20 0030 6 boa 126 Da ACS ps 19 0013 19 0029 5 poz 5 pa 4 04118 DC12 18 D28 ace 15 AC3 Blos pz 17 DC11 a 9 17 DC27 ACL Slay pai 15 DC1 DIER 10 5 555 0010 DER 10 15 DC26 ACO 10120 poo 121 xo ACL 1i 0 24 009 TE 11 14 0025 ACO 12 13 DB ACO 18 13 0 24 GND 00 uss 14 Grp E12 16 Drea 15 Ki 14 15 DC E16 E17 oca NOTE LOAD R2775 OR R2776 BUT NOT BOTH ocio E18 TINi D E19 E20 R277 R277 5 5 45USEC SUSEC ouz Z 2776 aen R2763 j C222 R2764 C228 730 T M pus Eze ze 1000 1000 44 1000 oun E23 UCC 30V pu 30V SHT 2 U722 0723 DC19 9 SUSEC Ees eae eui E HM628512 __ ez yen om DC21 a i A17 cs RAM_L_CS RAM_H CS4 UIRQ INTRN RXDR DRXD D SI AC16 2 zz 24 RC16 2 54 ES DTXD A16 DTXD D 24 E27 5 ACIS
80. AC Input Assembly e AS DC Rail Assembly e Bias Assembly Front Panel Assembly e A7 Inverter Assembly e AN DSP Assembly e Output Filter Assembly e AIO Control Assembly e All Trigger Assembly General Description The 6811A B 6812A B and 6813A B are 375V A 750VA and 1750V A AC Source Analyzers whereas the 6841A and 6842A are 750V A and 1750V A power sources are used as Harmonic Flicker Test Systems The 6811A B 6812A B and 68414 can operate from 120 220 or 240 volt AC input main while the 6813A B and 6842A only operate from 220 240 volt AC input mains deliver regulated AC voltage and or current from 45 to 1000 hertz They can operate below 45 hertz to DC at derated output power See Users Guide for operation below 45 hertz They can generate sine square clipped sine or arbitrary waveforms The output waveform can be controlled from the front panel keypad or computer via GPIB or RS 232 The output characteristics or measurements voltage current frequency power factor etc can be readback via the front panel GPIB or RS 232 1 Front Panel Assembly The A1 Intelligent Front Panel assembly contains a circuit board a vacuum florescent display assembly keypad and rotary pulse generators RPG The circuit board contains digital logic circuits including a CPU ROM and RAM The front panel CPU decodes operator keystrokes and transmits the information to the A8 DSP assembly The front panel receives in
81. B B BB 88 ws 9 un SL ws 9 Bust 8 os S ER gre QM 0835 98 09 e e z z 682 zg 22 SB e e SS E601 609 B B 58 R663 R699 R698 R646 SB e B E ES E Em PL dn P BE JD um Di iue uris 2 5 8 EJ 53368 e SI ens Ei wees MIN 25 5 vreoi R630 C693 C692 Figure 6 14 Inverter Assembly Component Locations RAIL 5 8 g 5 8 E 3 3 9 5 8 u 55 5 i 8065 6690 9066 6690 E NEP 96i gt oer 961 26 SS 58 8 8 25 a 806 6690 s mig 8066 6690 oT ob a 961 oTo a 961 85 7
82. D SIS R194 10K I R155 0 047 1x 500 1 104 i 19155 I 1 104 l T R 5 Se 464 1x ACTI4 I i 1710W g E v NOT LOADED I es l Figure 6 23 Trigger Assembly Schematic Diagram RT1300 O J1355 1 O 31355 20 Figure 6 24 Thermistor Assembly Component Locations J1355 2 3 rt100 J1355 1 Figure 6 25 Thermistor Assembly Schematic Diagram E1256 6 Al Figure 6 26 Transformer Assembly Component Locations TRANSFORMER Figure 6 27 Transformer Assembly Schematic Diagram Index cal denied 45 calibration 45 post repair 45 change page 8 component locations AC Input assembly 73 bias assembly 80 control board 98 dc rail diode assembly 75 DSP assembly 86 FET assembly 71 front panel assembly 66 HP IB assembly 69 inverter assembly 83 output board 107 thermistor assembly 114 transformer assembly 114 trigger board 112 constant voltage load effect 11 constant voltage source effect 12 constant voltage tests 10 copyrights 4 current monitor resistor 10 p dc readback accuracy 13 dc voltage programming 13 description A front panel 17 A10 Control assembly 20 11 Trigger assembly 20 A3 FET assembly 18 A4 AC Input assembly 18 A5 DC Rail assem
83. DC 8 R1764 R1765 10 10 16ADC 7 R1762 R1763 C1732 R1760 R1761 10 10 WANA C1731 100PF GE 168DC 5 1758 R1759 10 1730 ei AV 10057 Wy A D_CLK 16ADC1 4 R1756 R1757 10 10 Sov 5 7 10 C1729 100PF A D_CAL 168DC 3 R4754 R1755 10 C1728 100 pop D i 168DC C2 R1752 R1253 10 10 50 C1722 mes 820 505 RUTZ R1750 R1751 50 16ADC 1 ANN ANN 1726 w A D_D0Z 1600 0 R1748 R1749 e 100 A D_D04 10 10 500 01284 100PF 0 05 SHT 10 100PF 5 820 006 Figure 6 17 DSP Assembly Schematic Diagram sheet 5 of 10 12uDSP DACS amp CLAMPS USED ON ALL MODELS 60DC1 e A_SEN1 SHT 7 16 CLAMP 12DAC1A R737 A_SEN2 10K EN 0242 109101 i AN 3 BADC1_A E 8RDC1 B gt 2 R798 SHT 2 9 LT1013 10K 8RDC1 C BADC1_D SHT 7 1 12UDSP 12008 CLAMP 12DAC2A NOT 3PHASE 12DAC4 A SUREF R799 SHT 9 j 10K 12DAC4_B UDD UREFA 12UDSP 1240 12005 BxD 0 24 _ DUAL 12 BIT Mau C257 CLAMP 12DAC2B pac 28 5 28 RFB A 0 1 R742 21582 SUREF Sou 10K Bxpca 20
84. DE QUICK START ITALIAN 5962 0841 IDE QUICK START SPANISH 5962 0843 IDE QUICK START CHINESE TAIWAN 5962 0845 IDE QUICK START KOREAN 5962 0847 IDE QUICK START GERMAN 5962 8101 IDE QUICK START JAPANESE 5961 5190 IDE USER JAPANESE 5962 8113 IDE QUICK START CHINESE PRC 5962 8115 IDE USER CHINESE PRC Table 5 3 Parts List for AC Input Board C1010 1011 0160 4183 CAP 1000 pF 20 C1012 1016 All 0160 7606 CAP luF 275V C1020 1021 0160 3969 CAP 015 uF 20 C1022 1023 1080 0160 4439 4700 20 1040 0160 4355 CAP 01uF 10 1050 0160 4065 CAP luF 20 C1051 1052 0160 7606 CAP luF275V C1060 1061 6813A B 6842A 0180 4641 CAP 2700 uF 200V C1062 1065 6811A B 0180 4528 1800 uF 200V C1062 1065 6812A B 6841A 0180 4641 CAP 2700 uF 200V C1066 1067 6813A B 6842A 0180 4641 CAP 2700 uF 200V D1060 All 1906 0389 FWB KPC3506 356 D1061 All 1901 1098 DIO IN4150 DS1080 All 1990 0517 LED VISIBLE E1047 6811A B 6812A B 6841A 5060 3586 ASSY WIRE KIT E1051 All 66000 60051 ASSY WIRE KIT F1020 6811A B 6812A B 6841A 2110 0910 FUSE 30AM 500V F1020 6813A B 6842A 2110 0849 FUSE 25AM 250V F1080 All 2110 0098 FUSE 20AM 250V HS1060 All 1205 0861 HEAT SINK 11035 All 1252 2672 CONN POST TP HDR 11042 All 1251 4781 CONN UTIL J1047 All 1251 5613 CONN SGL CONN J1049 All 0360 2421 BARRIER BLOCK K1040 1041 All 0490 1834 RLY 1C 12VDC L1020 6811A B 06811 80003 CHOKE INPUT L1020 6812A B 6841A 66000 80004 CHOKE INPUT L1
85. H DSP OR A11 TRIGGER BOARDS SEE A8 DSP ASSEMBLY TROUBLESHOOTING AND A11 TRIGGER BOARD TROUBLESHOOTING TURN UNIT OFF REMOVE FRONT PANEL BOARD REMOVE FRONT FRAME TRIM STRIPS ONE EACH SIDE REMOVE 2 SCREWS EACH SIDE OF FRONT FRAME TORX 10 REMOVE KNOBS FROM VOLTAGE FREQUENCY CONTROL 0 050 HEX DRIVER MOVE FRONT FRAME AWAY FROM CHASSIS FRAME WILL ONLY MOVE A FEW INCHES REACH BETWEEN FRAME AND CHASSIS AND DISCONNECT CABLE FROM FRONT PANEL PC BOARD REMOVE SCREW TORX 10 HOLDING PC BOARD LIFT PC BOARD FINGER AND SLIDE BOARD TOWARD ON OFF SWITCH TO REMOVE BOARD FROM FRAME USE LONG CABLE 5080 2381 FROM SERVICE KIT TO CONNECT PC BOARD TO A4 BIAS SUPPLY TURN UNIT ON CHECK F1 SEE FIGURE 6 2 CHECK 5V FROM A4 BIAS BOARD SEE FIGURE 4 6 AND FIGURE 6 12 REPLACE FRONT PANEL PC BOARD CHECK COMMUNICATION FROM A8 A11 BOARDS SEE A8 A11 BOARD TROUBLESHOOTING CHECK PULSES 11 0150 1 0151 5 U153 3 U 154 1 SEE FIGURE 4 10 USE CONTROLLER TO READBACK SYSTEM ERROR REGISTER IF FRONT PANEL ERROR IS RETURNED 201 220 224 SUBSTITUTE KNOWN GOOD FRONT PANEL BOARD OR REPLACE FRONT PANEL BOARD Figure 4 2 Front Panel Assembly Troubleshooting A2 GPIB RS 232 Board Troubleshooting Table 4 4 GPIB RS232 Board Troubleshooting Check for 5 Vdc at L100 see Figure 6 5 for location Check for clock waveform at Y 100 Connect the unit to a GPIB or RS232 controller to check the GPIB RS232 tran
86. HTS 150 500 SUB LENE 984 SENSE RELAY SHT2 INHIBIT SHTS 500 RER RRIL INHIBIT sHTegs eg 1 m RAIL_HI_FAULT N Sou SCH RAIL_ LO_FAULT 10 11 12 14 13 5 4 15 1 3 7 16 6 9 V W V VY REF RMS IM VVVWVV PFF RS ILM our BEL V O SENSE REL I L MON 150 WFRG SHT1 3 4 5 RAIL_INH Vu SHT e 0992 STICK SHT5 7 e 0 047 50 a IMON_10X C998 FAN_CURRENT NC 0 047 50 EXT CLK SYNC 15U T5U Y Y E ILM REF n NC NC NC NC NC NC NC NC NC NC NC NC 64 32 63 53 21 52 20 51 19 50 18 49 17 48 16 47 15 46 14 45 35 3 54 2_ 53 1 J824 OUTPUT BORRD CONNECTOR Figure 6 19 Control Assembly Schematic Diagram sheet 6 of 7 SHT4 I EXT PROG MON LO SHT6 ee MODEL NO 6812 MODEL NO 6813 REF DES VALUE PART NO VALUE PART NO U_MON R857 0 0699 2643 0699 3046 SHT1 2 6 SHT2 2 4 6 I MON R924 1 78K 0699 2981 72 5K 0699 3048 5 4 U EXT PROG SHT1 R926 28 95K 0699 3071 5 0699 3620 R932 1 7 0699 2981 0699 3048 R934 2 95 0699 3071 0699 3620 R977 20K 0 1 0699 2491 0699 2489 R1801 28 7K 0699 3071 0699 3008 R1915 21 5K 0699 2986 10K 0699 3051 R19
87. MP GENERATOR U475 1 R487 TO TP404 RAMP GENERATOR NO 2 RAMP GENERATOR NO 1 C D 5 00 PWM DRIVER U491 8 DISCONNECTED TO FROMACFET TUE s DISCONNEC SHORT FROM RAIL LO FAULT INVERTER 1 TO PWM DRIVER FET RAIL DISCONNECTED PWM DRIVER NORMAL OPERATION E F Figure 4 5 DC Rail Assembly Test Waveforms 30 Troubleshooting 4 A6 Bias Assembly Troubleshooting Checking the A6 Bias Assembly consists of checking the bias voltages and the fan speed control circuit NOTE You can determine if any of the bias voltage regulators are operating in current limit mode by disconnecting the cable going to the circuit where the bias is used If the bias voltage returns to normal with the cable disconnected most likely the bias circuit is OK Table 4 6 Bias Assembly Troubleshooting Check the bias voltages at the following locations Measure at the following points Test point Common point C314 C302 P C304 C302 P C313 C317 H U312 tab C317 H U311 tab C317 H U322 tab C329 Y C331 tab C329 Y E346 2 D322 F E346 1 D322 F E336 2 E336 3 E336 1 E336 3 Check the fan speed supply by measuring the voltage at Test point Common point C361 and D322 F Change the fan speed and
88. PHASE 8DRC1 D Uis R2749 AKA ANALOG SHT 7 10 CONNECTDR BDAC1_E SHT 6 795 c796 C798 C799 xd SUREF 8DRC1 F Tu 0 1 1 9775 210 055 SUREF 200 560 4297 6 3 UDD UREFR 50 U724 12DAC5 UDD UREFA apace gADC1_B cU BXD 0 24 DUAL 12 BIT 4789 SHT 6 7 j Dac 24 _ DUAL 12 BIT 88DC1 C BXDC1 25 05 2 x 351080 DAC m 2 gt ES RFB _ 1 Dare DB2 22 RFB A 6 BXDC3 21 4 DB2 DBS OUT A 31 4 BXxD 4D 20 083 QUT A DB4 5 BXD 4 20 BXD S 19 GND DB4 5 DBS 5 19 A END 6 18 DBS BXD 7D 17 086 12 BxD 6 18 DB6 V RFB B BxDC2 12 ers bas 120406 8 Mic o wee 12DACS_WR cs 8 SHT 5 15 WR 135 gt 15 00 16 AL 15 055 UREFB 11 RMPC 11 7 10 4 wavc NZ 2714 C2715 SUREF D5 12DAC6_WR 10 9 1 SHT 5 20V 500 R2750 ha 12UDSP R2745 C790 C791 10 _12DAC6_A x e SHT 6 5 120 06 8 200 500 Figure 6 17 DSP Assembly Schematic Diagram sheet 9 of 10 SHT 9 SHT 5 7 SHT 5 SHT 9 16ADC4
89. Part No RT1 3004 All 0837 0397 Thermistor Cyl All 5080 2367 Cable Front Frame M2 Window Figure 5 1 Front Panel Components see Table 5 1 62 Diagrams Introduction This chapter contains drawings and diagrams for troubleshooting and maintaining the Agilent Series 6611A B 6612 6613A B AC Power Source Analyzers and Agilent Series 6841 6842 6843 Harmonic Flicker Test Systems Unless otherwise specified a drawing or diagram applies to all models of the series see general schematic note 1 Wiring connections to external equipment are shown in the ac source User s Guide General Schematic Notes Not all components or values shown on the schematic apply to all ac source models The parts lists in Chapter 5 contains information about components that are model specific e All resistors are in ohms 1 1 8 W unless otherwise specified All capacitors are in microfarads unless otherwise specified e Signal lines that are terminated by flags continue on other sheets and may go to other locations on the same sheet For example CVPROG SH 2 8C on sheet 2 location 8C the same location resistors are in ohms 1 1 8 W unless otherwise specified e All resistors are in ohms 1 1 8 W unless otherwise specified Unless otherwise noted bias connections to integrated circuit packages are as follows Common 5 14 pin packages pin 7 pin 14 16 pin packages pin 8 pin 16 20 pin packages pin 10
90. R922 Ro14 C906 HS_MON 16 9 16 9K VMV RI 3 1 R923 500 01825 762204 R927 15u 20K 1x 0 047 75K C901 T_HS_OFFSET VE RON 0 047 pu dz 2 9906 0902 8 TJ Q SC rms ZE A 9062119 TL072A lz le PR Ro28 SHT6 oe V 8 U90541 1 3 16 v _ H gt i R924 1 _ H P P 7 5K 15U R925 6 19U 0908 REF MOT 0 047 AN ps R926 Je Jiz 10 A jew TL ANN 9 ras 5 78 0905 R913 i alt 6 aoce11a LA 2 5 10K P T 4 TEMPERATURE INTEGRATOR TLO72A C903 R929 R918 6707 D ANN 11 RON 0 047 0 1 SHTS D 15V 5 ou R931 75k co04 2 T_HS_OFFSET 54 R915 R916 Sum jie e 10906 13 12 U902 2 TJ QP I PLUS 2 pue H gt sl 2 SHT4 14 9062116 TLOZ2R je le F TP R93S 905 _ 3 16K 7 Roz2 e0Ge1 18 AA T 7 5K 0 047 R933 I L MON 9 SHT6 LOADED R934 I L MON 59 R921 I_MON SHT2 4 6 em I_PLUS 151 LOGIC_LOW SHT2 Ne Figure 6 19 Control Assembly Schematic Diagram sheet 3 of 7 I PEAK INVERTER R952 glU941 PERK ERROR 0949 AAM Zi IPEAK_CNTL I PEAK REF AMP die C944 el mE i ze I EXT PROG R1856 R1855 500 IM NEE SHT7 5946 R953 LOADED C1867 LOADED I MON 4 4
91. S to rms and then program output voltage to near 3 amps for 6811A B near 5 VOLT 120 FREQ 60 SHAPE SIN CURR 3 00 for 6811A B amps for the 6812A B 6813A B CURR 5 00 for the 6812A B 6813A B 6841A 6842A 6841A 6842A Record DVM reading and calculate rms current Readings are within specified current high range limits Program CURR RANGE LOW CC annunciator on output current near 5 0 amps Record DVM reading and calculate rms current Readings are within specified current low range limits 12 Performance Tests 2 Table 2 6 Harmonic Distortion Test Normal Result This test measures the total harmonic distortion of the output sinewave at full power 1 Turn off the UUT Connect load resistor and DMM as shown in Test Setup Figure 2 1 with S1 closed 5 8 amps for 6813A B 6842A 3 Record the total harmonic distortion reading from the audio Readings are less then maximum analyzer and front panel display of UUT specified limits Table 2 7 Frequency Accuracy Test Normal Result This test verifies the frequency programming and measurement accuracy of the output voltage waveform 2 Turn on the UUT Program output voltage to CV annunciator on Output current at 1 2 amps for 6811A B VOLT 300 FREQ 60 SHAPE SIN CURR MAX 2 5 amps for 6812A B 6841 Turn off the UUT Connect the audio analyzer directly to the UUT output terminals Connect the frequency counter to the Monitor Output on the rear panel of the audio analy
92. SERVICE MANUAL AC Power Source Analyzers Agilent Models 6811A 6812A and 6813A 6811B 6812B and 6813B Harmonic Flicker Test Systems Agilent Models 6841A and 6842A For instruments with Serial Numbers AGILENT 6811A US37290101 and up AGILENT 6811B US38390481 and up AGILENT 6812A US37290101 and up AGILENT 6812B US38390451 and up AGILENT 6813A US37290101 and up AGILENT 6813B US38390285 and up AGILENT 6841A US37340101 and up AGILENT 6842A US37340101 and up For instruments with higher serial numbers a change page may be included ee Agilent Technologies Agilent Part No 5962 0859 Printed in U S A Microfiche No 6962 0860 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 warrante
93. SS CAPACITORS 1000PF 50 1000PF 1000 5 50 1 PER ICD PF 1000PF 5 RSese 111 R141 R140 4 64K 4 64K 50 50 2101 MICROPROCESSOR 45 goi 45 16 ADCS 15 ___ 0 4 14 ADS 13 AD 2 12 ADC1 p axo AD 41 ETE ES 59 R139 4 64K 13 oc 14 2 10 lt 9 6 5 0 6 ADC PSEN ALE PROG 87CS1FA 10 V CONN IC 1180 U100 10 SERIAL LINK RST COMMENTS EE 1 RS232 HPIB MODE NOTE 0100 CAN BE RESET IN THE RS222 HPIB MODE BY HOLDING PRX LOW FOR LONGER THEN THE TIME CONSTANT OF R138 C130 SERIAL LINK U104 gt 3 a LL RCT1z2 Y100 T T 4 151131 2l 13 SKS U104 15 oe lt e 11 9105 1K C120 1 528 12 13 dl R1z8 RCT132 0 1 ANN 50V 100K Ve 50 50 R142 TUR 5 0104 MSTX R132 6 AAA ke 10 SERIAL LINK ACT132 ACT132 SPARES 59 0105 0105 0105 2 er ger 8 2 ACT14 RCT14 RCT14 Figure 6 5 GPIB Assembly Schematic Diagram 15 S E504 O C220 9 0881 0845 000000 R285 R286 a 29 D 91 o N ooooooLl 4201 000000 C2085 Figure 6 6 FET Assembl
94. Table 4 10 Trigger BNC Board Troubleshooting continued Result I3 Connect a voltmeter between J113 1 and J113 2 Voltmeter should read 5 Vdc 4 Short the RI terminals together J113 3 to 113 4 Voltmeter should read LOW 0 07 Vdc 5 Enter the following front panel commands Voltmeter should read HIGH 5 Vdc SHIFT STATUS QUES EVEN ENTER If J113 1 does not go low trace the signal from the AN DSP board at the following locations Normal DFI True All U164 13 U165 3 5 LOW All U164 12 U165 4 LOW 5 Vdc e SOus div A U150 1 DRXT B U151 5 DTXD Sous div Soussi D U154 1 ARXD C U153 3 ATXD s div E TRIGGER OUT PULSE F DFI TEST SETUP Figure 4 10 Trigger BNC Assembly Test Waveforms 43 4 Troubleshooting Initialization NOTE Initializing the unit erases all calibration waveform and list data Instruments that are being initialized for the first time or have suffered non volatile memory corruption should be initialized with the front panel EEINIT command To initialize the unit perform the following 1 Turn the unit on then do the front panel CAL ON command 2 Press 0 and 9 keys simultaneously EEINIT lt model gt should now be displayed 3 Scroll to the correct model number and press ENTER If the command is successful the front panel display will go through a normal p
95. Turn off the UUT and connect DVM and Ratio Transformer as shown in Test Setup Figure 2 1 Switch S1is open Turn on the UUT Recall factory defaults with RST then CV annunciator on program output to VOLT 300 FREQ 45 SHAPE SIN Output current near zero 1 3 Record voltage readings at DMM and on front panel Reading within specified high range display 300V 45Hz limits 5 Record voltage readings at DMM and on front panel Reading within specified high range display 300V 400Hz limits L 6 Program FREQ 1000 CURR PEAK 40 Esch 7 Record voltage readings at DMM and on front panel Reading within specified high range display 300V 1KHz limits Table 2 3 Constant Voltage Load Effect Action Normal Result This test measures the change in output voltage resulting from a change in output current from full load to no load or no load to full load Program FREQ 400 Turn off the UUT and connect DMM Load Resistors Current shunt and Ratio Transformer as shown in Test Setup Figure 2 1 with S1 closed 2 Turn on UUT Recall factory defaults with RST Set CV annunciator on output current near ALC DET RMS to rms then program output to VOLT 1 2 amps for 6811 A B 300 FREQ 60 SHAPE SIN 2 5 amps for 6812A B 5 8 amps for 6813A B 3 Record voltage reading of DMM Open 51 Output current near zero Record voltage readings at DMM Check test results The difference between the DMM readings in Step 3 amp 5 are w
96. U MON E U_MON_RET e GNOC ee DU STICK U MON INU 150 SEC v 15V SEC GNDY M I L MON I L MON RET GND_REF WP GNDO a d OUTPUT_RELAY SENSE_RELAY 1252 1052 28 6 37 5 45 15144 12 45111 42 10 7 4 35 3 342 53 1 TO BIRS BOARD bliss ES lest 8 je 10 11 12 15 14 INU PCLR e 59 SEC 1595 1595 1595 GRDY GRDY GRDF INPUT RELRY ON FAN_PROG FRN UOLTRGE NC 5_INPUT_RLY INPUT RLY GRD NC NC TO DIODEZ DC RRIL BOARD L GNDX INU PCLR RRIL HI FRULT RAIL_LO_WARN RATL_LOW_FAULT RATL_INH EXT_CLK_SYNC 595 GRDD 595 GRDD Figure 6 21 Output Assembly Schematic Diagram sheet 4 of 4 QO0OO0S8UH d49UMH eStn 7 N Co EE Ni T m pue eh Bea 53838 d E28 n Ram LSN H eS 58 E 58 SSTA R151 R162 ooooooot m QD UO eo Figure 6 22 Trigger Board Component Locati
97. Vrms 190mV 1 2mV 300Vrms 400Hz 298 200 301 800 Front Panel Display Vrms 400mV Vrms 400mV 1 2mV 300Vrms 1KHz 296 700 303 300 Front Panel Display Vrms 700mV Vrms 700mV 1 2mV CV Load Effect Vout 1 5V Vout 1 5V CV Line Effect Vout 0 3V Vout 0 3V rms Current Readback Front Panel Display High Range Io 0 0175A 10 0 0175 Front Panel Display Low Range Io 0 0045A A 10 0 0045 ImA Total Harmonic Distortion Front Panel Display 1 Frequency Programming amp Readback Accuracy Program 400 Hz 399 960 Hz 400 040 Hz Front Panel Display Fo 0 040 Hz Hz Fo 0 040 Hz DC Voltage Programming amp Readback Accuracy 425 VDC Output 422 575 Vde Vde 427 425 Vdc Front Panel Display Vo 0 363 Vdc Vo 0 363Vdc 425 VDC Output 422 575 Vdc Vde 427 425 Vdc Front panel Display Vo 0 363 Vdc 0 363 Vdc Note 1 Measurement uncertainties are only valid when using test equipment listed in Table 2 1 2 Voltage Programming and Readback measurement uncertainties for a 3458 DMM in the 1000 volt range 3 Measurement uncertainties in parenthesis are only if a 30 1 ratio transformer is used with the 3458A DMM 16 Principles of Operation Introduction Figure 3 1 at the end of this chapter 1s a block diagram showing the major circuits within the AC Power Source Analyzer and Harmonic Flicker Test System These units consist of the following modules e e A2 GPIB Assembly e AC FET Assembly e A4
98. WF TRIM 0 1 R800 9 1 150PF 2 50 500 511K R1834 C1802 WFDC_OFFSET R801 e 0 047 v2 10K 1x 1 104 WFAC_PROG R1890 R802 R803 0802 G ANN ANN 5 2 SHT6 17104 17104 1 0 27 2 BAS28 50 1852 3 HE 12 le Tre 4 rese Su E een su C1808 0047 ET 13 5 0 047 V 0800 D6444DY LEUELING MODE Le 2804 C802 URB00 _ ZL FDBK 4 3 48K 4700 4 6 20 14 15 C826 K i R817 T RB05 12 le Pel 4 3 E 1 96K 4700PF I c827 D SHT 13 5 200 15V m 4700PF meee Lr 0858 UB00 e au 4700 R818 2R_FDBK RB06 R839 10K A ii R1811 d U800 D6444DY E T z MODE EIE 5 6 e 12 4 op as U_MON SHT2 6 D6444DY 16 R812 10K 7 EAE A Z 5 5 1 1 AC COUPLING SCH L E MODE 0800 DG444DY 0 047 5 R1889 URO46 84 AN pL 1 21K X AC_MODE SHT6 e INU INHIBIT SHTS IPEAK_CNTL SHT4 TPEAK_CNTL RAMP_TRIM CONTROL MODE COMPARATOR 15U A C814 550 1 96 IPK FDBK SHT4 50 PWM COMPARATOR R1868 68 1 C1839 0 047 PWM_CNTL SHTS 1806 4185528 R853 C810 R852 21 5 iK R826 N AAA 26 1K Z R829 R828 PEN I L MON AAA AAA ep 5 4 4 64K 562 R830 AAA 6 49 R827 C819 ANN u
99. alibration password is reset to 0 and the remote programming language is set to SCPI This option is useful if the user has forgotten the password Inhibit Cal In this position the calibration of the power source cannot be changed calibration commands are disabled If the CAL ON command is sent with the switch in this position an Out Of Range error will be displayed on the front panel This option is useful in installations where calibration access is guarded by instrument seals 45 4 Troubleshooting Disassembly Procedures The following paragraphs provide instructions on how to disassemble various components of the ac source Once disassembled the components can be reassembled by performing the disassembly instructions in reverse order Figure 4 12 shows the location of the major components of the unit Figure 4 12 Component Locations 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 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 list of required tools when performing disassembly and replacement 46 Troubleshooting 4 List of Required Tools T10 T15 and T25 Torx screwdrivers Allen wrench 0 050 inch 2PT Pozidriv screwdriver 2 Phillips screwdriver 3
100. anufacture where US USA 3729 This is a code that identifies either the date of manufacture or the date of a significant design change 0101 The last four digits are a unique number assigned to each unit Manual Revisions This manual was written for ac sources that have the same or higher serial numbers as those listed on the title page NOTE If the serial number of your unit is higher than that shown on the title page your unit was made after the publication of this manual and may have hardware or firmware differences not covered in this manual If they are significant to the operation and or servicing of the ac source those differences are documented in one or more Manual Change sheets included with this manual If the serial number of your unit 1 lower than those shown on the title page your unit was made before the publication of this manual and can be different from that described here The previous versions of this manual print date October 1995 or July 1997 applies to these units Firmware Revisions You can obtain the firmware revision number by either reading the integrated circuit label or query the ac source using the GPIB IDN query command see Chapter 4 Troubleshooting Electrostatic Discharge CAUTION The ac source has components that can be damaged by ESD electrostatic discharge Failure to Observe standard antistatic practices can result in serious degradation of performance even when an actual failure doe
101. bly 18 A6 Bias assembly 19 7 Inverter assembly 19 Digital signal processing assembly 19 A9 Output Filter assembly 19 GPIB assembly 18 RS 232 assembly 18 disassembly 46 AC FET assembly 48 AC Input board 48 Bias board 49 DC rail board 48 DSP Control board 49 front panel 47 HP IB RS 232 board 48 Inverter assembly 49 output board 50 tools 47 trigger board 50 k electrostatic discharge 8 error codes 22 23 ESD 8 firmware revisions 8 frequency accuracy 13 H harmonic distortion 13 hazardous voltages 7 hints 21 J identification 8 inhibit calibration 45 initialization 44 interconnect diagram 65 J J307 voltages 39 40 M manual revisions 8 N notice 4 Q0 overall troubleshooting 24 p power on self test 22 R readback accuracy 11 replaceable parts ac FET board 56 ac input board 54 bias board 55 115 control board 62 dc rail board 57 58 59 DSP board 62 front panel board 62 main assemblies 52 output board 60 thermistor board 62 revisions 8 rms current accuracy 12 ROM upgrade 44 run time 23 safety considerations 7 summary 3 schematic diagrams AC input assembly 74 bias assembly 81 control board 100 dc rail diode assembly 77 DSP assembly 88 FET assembly 72 front panel assembly 67 HP IB assembly 70 inverter assembly 84 output board 108 thermistor assembly 114 transformer assembly 1
102. d 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 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 Custom
103. el not responding 210 Ingrd receiver framing error Ingrd uart overrun status Ingrd received bad token Ingrd receiver buffer overrun Ingrd input buffer overrun 215 Outgrd output buffer overrun 216 RS 232 receiver framing error 217 218 Ingrd inbuf count sync error 220 Front panel uart overrun Front panel uart framing Front panel uart parity 223 Front panel buffer overrun 224 Front panel timeout 401 CAL not enabled CAL noble 406 600 Systems in mode list have different list lengths o Jo K OE 601 Requested voltage and waveform exceeds peak voltage capability E 602 Requested voltage and waveform exceeds transformer volt second rating K Command only applies to RS 232 interface Trigger received before requested number of pre trigger readings Requested RMS current too high for voltage range dp Waveform data not defined 609 Output buffer overran 610 Command cannot be given with present SYST CONF setting Communication error between Al GPIB A8 DSP and or A11 trigger assemblies Communication error between A3 front panel A8 DSP and or A11 Trigger assemblies Check CAL switch positions see Figure 4 11 E F G RS 232 communication or programming error H J See Appendix B in User s Guide for calibration procedure K Programming error see applicable programming command in Programming Guide 23 4 Troubleshooting Overall Troubleshooting Flowchar
104. elay Assembly Troubleshooting A11 Trigger BNC Board Troubleshooting Initialization ROM Upgrade Identifying the Firmware Upgrade Procedure Post repair Calibration Inhibit Calibration Switch Disassembly Procedures List of Required Tools Top Cover outer cover Removal Inner Top Cover Removal Front Frame Panel Assembly Removal and Replacement A2 HI IB RS 232 Board Removal and Replacement A3 AC FET Assembly Removal and Replacement A4 AC Input Board Removal and Replacement A5 DC Rail Board Removal and Replacement A6 Bias Board Removal and Replacement A7 Inverter Assembly Removal and Replacement A8 DSP Board and A10 Control Board Removal and Replacement A11 Trigger BNC Board Removal and Replacement A9 Output Board Removal and Replacement 5 REPLACEABLE PARTS LIST Introduction Reading the Tables How to Order Parts 6 DIAGRAMS Introduction General Schematic Notes List of Figures INDEX 51 51 63 63 64 115 Introduction Organization This manual contains information for troubleshooting and repairing to the component level models Agilent 6811A B 6812A B and 6813A B Power Source Analyzers and models Agilent 6841A and 6842A Harmonic Flicker Test Systems All models will hereafter be referred to as the ac source This manual is organized as follows Chapter 1 Introduction Chapter 2 Performance tests Chapter 3 Principles of operation on a block diagram level Chapter 4 Troubleshooting Chapter 5 Replaceab
105. er Table 4 1 Test Equipment Requirements for Troubleshooting Equipment Characteristics Recommended Model GPIB Controller Communicate with AC Source via GPIB or HP Series 200 300 controller or RS232 Equivalent Digital Voltmeter Check voltages resistances Agilent 3458A or equivalent Troubleshooting Hints e Service kit 5063 2330 contains 2 PC board holders to hold the 5 DC Rail board in a vertical position for troubleshooting and a PC board extender that raises the A8 DSP and A10 Control boards above the chassis for troubleshooting Extender board part number 5063 2331 PC B holder part number 5020 8458 Cable part number 5080 2381 e Locate and observe the 2 red LEDs which indicate when high voltage is present on the A4 AC input board A5 DC rail board and A9 output board Wait for the LEDs to extinguish before removing or installing assemblies e fboth CV and CC annunciators are on the peak current limit is may be set to low 21 4 Troubleshooting Power on Self test Failures The power on self test sequence tests of most of the digital and DAC circuits 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 4 2 lists the self test errors and gives a possible remedy for each error Table 4 3 lists the
106. er 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 1 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 CUSTOMER 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 GENERAL This is a Safety Class 1 instrument provided with a terminal for connection to protective earth ground OPERATION BEFORE APPLYING POWER Verify that the product is set to match the available line voltage the correct line fuse is installed and all safety precautions see following warnings are taken In addition note the instrument s external markings described under Safety Symbols WARNING e Servicing instructions are for use by service
107. everse order taking care to reconnect the rail choke wires to the correct terminals and the power transformer cable to the correct receptacle Troubleshooting 4 A6 Bias Board Removal and Replacement a b nm j Remove the outer and inner top covers as described earlier Remove A5 DC rail board as described earlier Disconnect cables from J306A J306B J335 J337 J339 and J343 Disconnect wires going to S1 on off switch Record where wires terminate at switch Using T15 Torx screwdriver remove 1 screw holding A6 bias board to chassis Using 2PT posidrive screwdriver remove 4 screws holding bias transformer and A6 bias board to chassis Slide A6 bias board to the left and lift from chassis To reinstall the A6 Bias board perform the above steps in reverse order A7 Inverter Assembly Removal and Replacement a b re Bo 1 Remove outer and inner top covers as described earlier Lift fan out of chassis and rest on A5 dc rail board Disconnect cables to J526 and J527 on A9 output board Disconnect cables to J627 from A9 output board and J638 from A6 bias board Disconnect cables to J828 and J855 on A10 control board Disconnect cable at 1444 on A5 DC rail board to help in removal of A7 Inverter assembly Using T15 Torx screwdriver remove screw holding A7 Inverter assembly to rear chassis Slide A7 Inverter assembly toward front of unit and lift from chassis To reinstall the A7 Inverter assembl
108. f 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 8 DSP Assembly b A9 Output Filter Relay Assembly AIO Control Assembly If the A8 DSP Assembly is replaced the supply must be initialized first see Initialization previously discussed 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 this switch in order to calibrate the supply The internal calibration switches are located on the A8 DSP board and are accessible by removing the top cover inner cover then lifting the 10 control board and A8 DSP board assembly Switches 1 and 2 set the calibration configuration The three switch positions are illustrated as follows Normal Clear Password Inhibit Cal off on off on off on 1 m _ m 2 3 B 3 4 4 4 Figure 4 11 Calibration Switches Normal This is the default switch position The calibration functions are accessible after entering a numeric password The default password is 0 and is changeable by the user Clear Password The c
109. formation from the A8 DSP assembly to update the display The front panel assembly is a surface mount SMT assembly and is not component level repairable The A1 front panel assembly is common to all models 17 3 Principles of Operation A2 GPIB RS 232 Interface Assembly The A2 GPIB RS 232 interface assembly contains the CPU and GPIB interface controller for communicating with a GPIB controller The A2 interface assembly also contains the logic for communicating with a computer via RS 232 The interface type GPIB or RS 232 is determined by the operator using front panel keystrokes When using the RS 232 interface the operator can select the baud rate and parity using the front panel keypad The GPIB RS 232 interface assembly is an SMT assembly and is not component level repairable The A2 assembly is common to all models A3 FET Assembly The 6813A B and 6842A A3 FET assembly contains 8 power FETs and 2 bridge driver ICs The power FETS and power transformer form an H Bridge converter The A3 FET H Bridge converts the 320 volt DC rail from the AC Input assembly to 500 volts DC on the A9 Output assembly via the A5 DC Rail assembly The A3 assembly power FETs switching frequency is synchronized with the switching frequency of the A7 Inverter assembly The FET switching frequency is approximately 42 KHz 1 2 that of the A7 Inverter assembly The 6811A B 6812A B and 6842A ACFET assemblies having lower output power ratings then
110. gger boards as described earlier Disconnect cable going to J337 on the A6 bias board Disconnect cable going to J445 on the A5 DC rail board Using T15 Torx screwdriver remove 4 screws holding A9 output board to chassis Slide A9 output board toward the front of the unit and lift from chassis To reinstall the A9 output board perform the above steps in reverse order Replaceable Parts List Introduction This section lists the replaceable electrical and mechanical parts for the Agilent Series 6611A B 6612A B 6613A B AC Power Source Analyzers and Agilent Series 6841A 6842A Harmonic Flicker Test Systems Reading the Tables Each table lists electrical components alphabetically by reference designator and provides the Agilent part number followed by the part description Mechanical parts are placed after the electrical parts and listed alphabetically by part description Unless otherwise specified a listed part is used in all models of the series Model specific parts are tabulated by model number under the reference designator Note that the word All in the Applicability column in any of these tables means that the item is applicable to all models Part Reference Designators A assembly K relay T transformer B blower fan L inductor TB terminal block C capacitor M mechanical U integrated circuit CR thyristor SCR P plug VR voltage regulator D diode Q transistor W cable or jumper DSP display LCD R resistor Y crystal oscil
111. he input voltage range is configured by moving jumpers on J353 J353 jumper configuration diagram 1 located on the bias assembly next to J353 Regulator U300 supplies 15 volts to the AC input relays and bias to the ACFET assembly Regulators U311 and U3121 supply 5 volts to the GPIB and front panel assemblies Opto coupler U362 transmits the input rly iso signal to relay K1040 on the AC input assembly J337 supplies 5 and 15 volts to the control assembly via the Output Filter assembly and 48 volts AC via E336 to the DC rail assembly The A6 assembly is a component level repairable assembly There is one unique assembly for the 6811A B 6812A B and 6841A and another unique assembly for the 6813A B and 6842A Inverter Assembly The A7 Inverter output amplifier assembly is a switching H bridge FET assembly operating at approximately 83 KHz It receives its switching logic from the A10 control assembly The A7 Inverter assembly can provide a sine square clipped sine arbitrary waveform or DC level to the A9 Output Filter assembly The Agilent 6813A B and 6842A uses twice as many power FETs as the Agilent 6811 A B 6812A B and 6841A assembly Slow start procedures disconnecting the 503 volt DC rail should be used when troubleshooting the Inverter assembly See Inverter troubleshooting for more complete information on s ow start procedures The A7 Inverter assemblies are component level repairable except for a FET failure Power FETs replace
112. he wires going to switch S1 noting the color code of the wires and the respective switch terminals to which they connect for subsequent reconnection The front frame can now be removed from the AC source To remove the PC board from the front frame use a T10 Torx to remove the screw Find the PC board finger that keeps the PC board from sliding in the direction of switch S1 Lift the PC board finger slide the PC board off the plastic fingers and remove the PC board from the frame To reinstall the front panel PC board and front frame perform the above steps in reverse order 47 4 Troubleshooting A2 GPIB RS 232 Board Removal and Replacement a b 4 Remove the outer and inner top covers as described earlier Remove the two 2 7 mm Hex screws that hold the GPIB connector place Using a T15 Torx screwdriver remove the screw holding the PC board to the rear chassis Disconnect the phone type cable from J112 To reinstall the A2 GPIB PC board perform the above steps in reverse order A3 AC FET Assembly Removal and Replacement a b 4 f 8 h Remove the outer and inner top covers as described earlier Remove DC rail cable from A4J1042 on AC input board Remove bias cables between A3J200 and A5J400 on A5 DC rail board and from A6J339 on the A6 bias board Lift fan straight up from unit and rest on A5 DC rail board Remove Litz wire cables from power transformer that connect to TB201 on A3 as
113. i o o gt gt gt gt 21 5K RAMP GENERATOR 10PF s 180805 237 RAMP_TRIM PM R841 90712 C822 SHT6 R835 6 NNV C821 a 237 3300PF 196K 4 epz12 0 047 dd 50 V R838 SCT 21 5 bats 10PF R848 237 SHTS pont RESET REG_REALTIME IPEAK_LIM e IPERK LIM SHT4 5 e NOTE DENOTES MODEL DEPENDENT VALUE SEE TABLE ON LAST PAGE Figure 6 19 Control Assembly Schematic Diagram sheet 1 of 7 ZERO VOLT SHUTDOWN ZERO_V SHTS e 50 VOLTAGE LEVELLING LOOP U_RMS_PROG R878 R869 C864 t 6870 Yz 1 104 Ac 1 104 B NOT 0 47 2899 R872 SHT6 LOADED 500 MA NOT LOADED LOADED R877 4 64K U_RMS_TRIM R870 R1808 R1809 T5860 URB60 150 1M 1M 1M Ge 01854 150 ap 5 5 0 047 N7 500 05 aD WFDC_MODU_ 80995 0996 4 C1814 wd 15 T BAS28 35 14 U_RMS_AC 2986 0870 lt dB OUT 0 33 4 0715 11 00K 1x 559 RMS OUT NC 171044 Besea R1823 C1855 z 348K C1815 Ee A 3007 Bu ajo R874 s4 E cs 100K 15V DEN IN BIN C1816 15U i SHT6 R1824 AAA RMSU UR MULTIPLIER 23 7K 150 VOLTAGE RMS DC CONVERTER C868
114. i VCC z 9 1692 MATE o Xu 7 v ace t St o GAL16V8 a M eps E mg noraa 228 GE 1 I0 CLK CBRE o LORS d j 2 2 a e 2 12 gt 58 SZ 228 szg 23 2 TEN 22 19 co z 7 run 2 0618 rom 1 e 5 Sz j 8885 558 EN lt 1 4 3 1 05 17 2 i S 9080 2371 E H zg 2 1 Two 10416 row 8 5 1588 2 288 C6 RS e ETES 91 rove m 6 5 15 rton Ji 0 047 D 7 l 02 14_ 1 T 4 amp 0160 5944 _1 VIN VCC 38 117091 13 5 m 12 rovc u o2 8 109095 s Bie e 3 L 293 5 Lan ob Tore lOE 9 gy 7 0631 588 boo 12V and 5V Undervoltage Detect 08 E GN ES z 19 S3 Tomi 1015 1820 8602 6 SHTDN 225 88 8 EES 288 685 Be 9 A ote E 10 gp 7 oB RAKAA el ES 0 047 D o VM GND 26 1 B 27 me aa 2 S Jeer i Tumon Drive 0699 9830 e u o lb tuk tuk Ror 8 10K A 4 16 9 5 ma ZUR PEN l GND 0699 3970 N 82 85 8 5555 0699 4009 1 X FRS g T lt x S 4 e EL S Log S lt 8 e e 2 SEN1 IOUT 6 e E rcir E gt z lt 596 Dour os 59 Fa R676 e 3 sEN2 REM 5 Kai D8 3 AAA Sk 299
115. ical data is subject to change Latin America Agilent Technologies Latin American Region Headquarters 5200 Blue Lagoon Drive Suite 4950 Miami Florida 33126 U S A tel 305 267 4245 fax 305 267 4286 Australia New Zealand Agilent Technologies Australia Pty Ltd 347 Burwood Highway Forest Hill Victoria 3131 tel 1 800 629 485 Australia fax 61 3 9272 0749 tel 0 800 738 378 New Zealand fax 64 4 802 6881 Asia Pacific Agilent Technologies 24 F Cityplaza One 1111 King s Road Taikoo Shing Hong Kong tel 852 3197 7777 fax 852 2506 9284 117 Manual Updates The following updates have been made to this manual since the print revision indicated on the title page 11 99 The instrument identification section on page 10 has been updated Sheet 1 of Figure 4 1 has been updated Sheet 2 of Figure 4 7 has been updated A Slow Start Procedure has been added to the end of the A7 Inverter Assembly troubleshooting section Part number corrections have been made in Table 5 1 Table 5 10 and Table 5 11 118
116. ithin specified load effect limits 11 2 Performance Tests Table 2 4 Constant Voltage Source Effect Normal Result This test measures the change in output voltage resulting from a change in AC Mains Input voltage from minimum to maximum value within the line voltage specification Turn off the UUT and connect DMM Load Resistors Current shunt and Ratio Transformer as shown in Test Setup Figure 2 1 with S1 closed Connect UUT AC input through a variable voltage transformer Turn on the UUT Recall factory defaults with RST Set CV annunciator on output current near ALC DET RMS to rms then program output to 1 2 amps for 6811A B VOLT 300 FREQ 60 SHAPE SIN 2 5 amps for 6812A B 6841A 5 9 amps for 6813A B 6842A Adjust variable voltage transformer to low line condition 104 or 207 VAC 5 Record voltage reading of DMM Adjust variable voltage transformer to high line condition 127 or 253 VAC 7 Record voltage readings at DMM Check test results The difference between the DMM readings in Step 3 amp 5 are within specified line effect limits Table 2 5 RMS Current Accuracy Test Normal Result This test verifies the measurement accuracy of the rms current readback 1 Turn off the UUT and connect an 20 ohm Load Resistor current shunt and DMM as shown in Test Setup Figure 2 1 with S1 closed 2 Turn on the UUT Recall factory defaults with RST Set CC annunciator on output current ALC DET RM
117. lator F fuse RT thermal resistor J jack SW switch Part Description Abbreviations assy assembly m metric PCB PC board W with bd board mch machine sq square w o without gnd ground mm millimeter submin subminiature xfmr transformer lg long mtg mounting thrd thread xtal crystal How to Order Parts You can order parts from your local Agilent Technologies Sales and Support Office When ordering a part please include the following information the Agilent part number the part description the model number of the unit 51 5 Replaceable Parts Refer to Figure 5 1 at the end of this chapter for location information 52 Table 5 1 Parts List for Main Assembly Ref Desig Applicability Agilent Part No TESTED CIRCUIT BOARD ASSEMBLIES 5060 3596 5063 2376 6811A B 6812A B 6841A 6813A B 6842A 6811A B 6812A B 6841A 6813A B 6842A 6811A B 6812A B 6841A 6813A B 6842A 6811A 6812A 6813A 6811B 6812B 6813B 6841A 6842A 6812A B 6813A B 6841A 6842A 6811A B 6812A B 6841A 6813A B 6842A 5063 2315 5063 2367 06811 61022 5040 1702 5040 1703 5080 2333 5001 6795 0370 3238 06811 80001 06811 80007 06812 80001 06812 80003 06813 80001 06813 80006 06841 80001 06842 80001 0360 2190 0360 2191 0515 1085 06813 20001 06813 80002 1252 1488 1400 0493 1400 0611 3101 3088 5001 0539 5001 6745 5001 6799 5001 9801 Front Panel Board Tested GPIB RS 232 Board Tested AC FET Board Tested AC FET Board Tested
118. le parts Chapter 6 Diagrams Safety Considerations This ac power source 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 4 wire 3 wire for Agilent 6811A B ground receptacle Refer to the Safety Summary page at the beginning of this manual for general safety information Before operation or repair check the ac source and review this manual for safety warnings and instructions Safety warnings for specific procedures are located at appropriate places in the manual WARNING Hazardous voltages exist within the ac power source chassis at the output terminals and at the analog programming terminals Only qualified personnel who have been trained in working with high voltage power equipment are to service this unit Related Documents The following documents are shipped with your ac source e aQuick Start Guide to help you quickly get started using the ac source e User s Guide containing detailed installation checkout and front panel information e a Programming Guide containing detailed GPIB programming information 9 a Quick Reference Card designed as a memory jogger for the experienced user 1 Introduction Revisions Instrument Identification The ac source is identified by a 10 digit serial number The items in this serial number are explained as follows US The first two letters indicates the country of m
119. ment requires that all FETs in the H Bridge have the same manufacture and same date code therefore when a FET replacement is required it may be more practical to replace the A7 Inverter assembly There is one unique A7 Inverter assembly for Agilent models 6811A B 6812A B and 6841A and another unique assembly for models 6813A B and 6842A A8 Digital Signal Processing DSP Assembly The A8 DSP assembly contains the CPU ROMs Digital to Analog DACs circuits that control the output voltage and output current settings It contains Analog to Digital ADCs circuits to readback actual output voltage and current It contains all logic circuits for generating arbitrary waveforms frequency changes and transient or pulse level changes At power on the A8 DSP assembly performs a self test and reports any failures via the front panel display The A8 assembly is an SMT assembly and is not component level repairable except for the ROMs which are installed in sockets and are replaceable for ROM upgrades There 1s one unique assembly for models 6811A B 6812A B and 6813A B and another unique assembly for models 6841A and 68424 A9 Output Filter Assembly The A9 Output filter assembly contains U500 the remote sense amplifier and K501 remote sense relay The rms and peak current sense resistors overvoltage divider and output disconnect relays K502 and K503 older manufactured units use one output disconnect relay K500 The A9 Output assembly contains 2 n
120. ms 400Hz 298 200 301 800 Front Panel Display Vrms 400mV Vrms 400mV 1 2mV 300Vrms 1KHz 296 700 303 300 Front Panel Display Vrms 700mV Vrms 700mV 1 2mV CV Load Effect Vout 1 5V Vout 1 5V CV Line Effect Vout 0 3V Vout 0 3V rms Current Readback Front Panel Display High Range Io 0 0175A 10 0 0175 Front Panel Display Low Range Io 0 0045A A 10 0 0045 ImA Total Harmonic Distortion Audio Analyzer 1 Front Panel Display 1 Frequency Programming amp Readback Accuracy Program 400 Hz 399 960 Hz Hz 400 040 Hz 0 005Hz Front Panel Display Fo 0 040 Hz Hz Fo 0 040 Hz DC Voltage Programming amp Readback Accuracy 425 VDC Output 424 075 Vde Vde 425 925 Vdc Front Panel Display Vo 0 363 Vdc Vo 0 363Vdc 425 VDC Output 424 075 Vdc Vde 425 925 Vdc Front panel Display Vo 0 363 Vdc Vo 0 363 Vdc Note 1 Measurement uncertainties are only valid when using test equipment listed in Table 2 1 2 Voltage Programming and Readback measurement uncertainties are for a 3458A DMM in the 1000 volt range 3 Measurement uncertainties in parenthesis are only if a 30 1 ratio transformer is used with the 3458A DMM 15 2 Performance Tests Table 2 11 Performance Test Record Agilent 6813A B 6842A Model Report No Date Test Description Minimum Results Maximum Meas Specification Specification Uncert Voltage Programming amp Readback Accuracy 300Vrms 45Hz 299 250 300 750 Front Panel Display Vrms 190mV
121. ons rs rm rm rm rm rm rm rm rm rm rm rs rm rm rs rs rs SECONDARY ISOLATION I DE bo KE C150 E 1000PF R150 Se 10K R156 C173 R162 4 10K R169 1 1 0 047 DRXD 1 104 nisu 0 1 TIN1 Av R167 1 IT AA RCT14 464 1x E 1710 vy I V i RI SMODE au TIN2 C174 ATXD R157 Mete R151 P ilu ARXD 4 64 0 047 na 1x 500 19 6 R187 ied 14JU165 J117 U163 14 0165 14 17104 DTXD 65 R170 171 Rie TRIG 6 5 8 9 acri RCT14 100 1 100 5 100 5 gt 5 TOUT1 1 10W 14 14 59 HPIB R152 0 JHB8 IG TIN2 SMODE DS TD158 12 412 R198 BIAS A 59 SEC R192 10K 17 0164 14 17104 2 ccm ATXD RCT14 10K R181 tee 13040162 R197 1 14 U165 DFI 1710 4 R180 1 4112 ASTON ACT14 PE 8 1404 2 p RI DFI s J113 14 0165 ALF a 11 10 3 pcm C178 POS 2 R1e5 c169 1 C154 Kai 1 0 047 I 47 R154 165114 5 4 05097 10K Riga H s R184 R185 1x NNV Av l 1710W 464 1 ACTIA 464 1 10K 1 ARXD RI 1 104 17104 17104 Y I Mien CLAMP I le D162 11 6 20 I I 50 200 l SEC 5U wd 1
122. ooooo 81 HESS zoo B uv ho DT 1 CD O N 6 osg13 O FO 17 ecatu LI eee TET T a Ed 0 1 558 a oooooooooooooooo en B ooo Ho 99 x Q S 02618 oe D 0061 8715 iil 039 gu m gren 1081 6 0084 L J U801 23 U801 25 OO OO OO OO OO OO J821 OOOO C D Figure 6 18 Control Board Component Locations sheet 2 of 2 J822 OO OO OO OO OO OO OO OO OO OO OO OO OO OO R824 R825 50 C800 R813 V_EXT_PROG R1858 R1857 AWN SHT vv IHESU Nor 180PF 0 VOLTAGE LOADED LOADED 500 ERROR C1853 1875 AMP 1200 WFDC_PROG 1891 R902 is C801 R815 2 5K 2 5K
123. otch filters to reduce the inverter switching frequency noise in the output It provides a communication path between the A10 Control assembly A5 DC rail assembly and A6 Bias assembly The A9 assembly is component level repairable There is one unique assembly for model 6811A B and another unique assembly for models 6812A B 6813A B 6841A and 6842A 19 3 Principles of Operation A10 Control Assembly The A10 Control assembly contains the PWM comparator and ramp generator for controlling the A7 Inverter assembly power FETs It contains the voltage and current rms dc converter circuits voltage and current readback amplifiers and all other analog circuits required to interface the output voltage output current and frequency programming and measurement capabilities with the A8 DSP assembly The A10 assembly is an SMT assembly and is not component lever repairable There are three unique A10 Control assemblies one for model 6811A B one for models 6812A B and 6841A and one for models 6813A B and 6842A A11 Trigger BNC Assembly The A11 Trigger or BNC assembly provides the communication and isolation path for trigger out U157 and trigger in signals U156 The A11 assembly provides the isolation optical couplers between the A2 GPIB interface assembly U153 U154 and AN DSP assembly 1115 The A11 assembly 15 an SMT assembly and is common to all models Output A4 AC Input FET A7 Inverter A9 Output 0 300VAC 12
124. ower on sequence ROM Upgrade Identifying the Firmware The model number then firmware revision is displayed on the front panel for approximately 10 seconds when AC line switch is turned on The firmware revision is also accessible via the GPIB using the IDN query The following sample Agilent BASIC program does this 10 ALLOCATE L 52 20 OUTPUT 705 IDN 30 ENTER 705 L 40 DISP L 50 END The computer will display the string AGILENT TECHNOLOGIES model gt 0 lt revision gt Upgrade Procedure It is possible to update to newer ROM versions without destroying the calibration data To update the unit to newer ROM revisions perform the following 1 Turn input power off remove the old ROMs and install the new ROMS 2 Turn the unit on then do the front panel CAL ON command 3 Press 0 and 9 keys simultaneously then scroll to the ROMUPD command 4 Scroll to the correct model number and press ENTER If the command is successful the front panel display will go through a normal power on sequence If OUT OF RANGE error is displayed then the instrument will have to be re initialized with the EEINIT command and re calibrated This can occur if the instrument was previously initialized with a QA firmware revision QA xx xx or if non volatile memory has become corrupted for any reason 44 Troubleshooting 4 Post Repair Calibration Calibration 1s required annually and whenever certain components are replaced I
125. placement part for all previous version ac source inverter boards Table 5 6 Parts List for FET Board C201 0160 7505 CAP 7 uf 5 200V C202 206 220 222 0180 4132 6 8uf 35V C203 218 227 0160 4835 CAP 1 uF 10 50V C204 205 217 221 242 243 0160 5098 22 uF 10 C207 209 215 216 6811A B 6812A B 6841A 0140 0204 CAP 47 pF 5 500V C208 219 6811A B 6812A B 6841A 0160 2006 CAP 100 pF 10 C207 209 215 216 219 6813A B 6842A 0160 2006 CAP 100 pF 10 C210 211 213 214 0160 6838 2200 pf IKV C226 239 0160 4791 CAP 10 pF 5 100V C228 0160 4904 6800 5 C229 235 238 240 0160 4832 CAP 01 uF 10 C230 0160 4831 4700 10 C244 245 0160 6806 CAP 1 uF 400V D201 203 204 206 210 1901 0050 DIO SWITCHING D202 205 1901 1065 DIO IN4936 PWR D213 217 220 223 1901 0050 DIO SWITCHING D224 1901 0731 DIO IN4004 10GO4 E239 5080 2359 CABLE E242 5080 2361 CABLE J200 1252 0055 CONN POST TP HDR L201 204 214 215 9170 1454 CORE SHLD BEAD L202 203 213 216 6813A B 6842A 9170 1454 CORE SHLD BEAD L206 207 210 211 9170 1510 L205 208 209 212 6813A B 6842A 9170 1510 CORE MAGNETIC Q201 203 222 244 5080 2241 FET MATCHED SET Q202 204 211 233 6813A B 6842A 5080 2241 FET MATCHED SET Q251 254 1853 0363 D45H5 H8 X45H281 R201 213 214 216 217 0699 3196 RES 150 5 1OW R202 0699 0208 RES 1 5 25W R203
126. prox in the E507 common forward direction and 4900 reversed Note All of the following measurements are taken with respect to E507 common same as TP 26 on A3 FET Board While adjusting the external 15 V supply input check the bias Voltage goes from low of OV to high of trip point at U204 1 TP 28 5V at an input of approx 12V and from high to low at an input of approx 13V Set external supply input to 15V and check drive 1 waveform at U201 10 TP 29 and drive 2 waveform at U201 12 UT 30 32 U202 1 TP 33 and U202 7 34 Pulses should be present on both sides of inductors L201 204 and L213 216 as follows Check the pulses on the driver transistor side Q251 Q254 of See Figure 4 3D each inductor Check the pulses on the FET regulator side Q201 Q204 See Figure 4 3E Q211 Q222 Q233 and Q244 of each inductor If the waveforms do not have the fast step as shown in Figure 4 3 then the associated FET gate input has an open circuit Measure the VREF voltage at U204 4 TP 35 approx 1 7 V 17 Check the peak current limit by connecting a 68 kQ resistor All pulses turned off from 5 V U201 9 to U204 5 27 4 Troubleshooting 10 uS DIV 10 uS DIV A J200 TEST SIGNAL FROM B U201 U202 PINS 10 12 SIGNAL GENERATOR DRIVE SIGNAL r r
127. q02 C4 1 0004 w 1 DETE O 22650 0 of 05 off 0 ell 0 SEEU Figure 6 10 DC Rail Diode Assembly Component Locations sheet 1 of 2 RAMP fig 403 RAMP fig 404 PWM EN 5V DAMP PULSE fig 402 10V RAIL REF Q Q Q Q Q QO MELLE aeo 9184850 Q ES on zoo 919 000000000000 ee seno 666664 Ku 0491 e R478ro 3 9 C466 o ejR468 o eis R406 R407 R400 R401 Q o 00 0 00 nd Oo Ieee OY 5405 o 5405 o O tees C R477 0485 S S Sa 9 bt OTP403 C491 H oTP402 00500000 qo TEENS x OTP401 U491 od dd Hooooooo z 0420 Q OQ O O QO Q Q O misol O00 dis es Sess aad 9 Wd mE d een EN Ede 2465 r 4 E454 10 454 2 05400 E422 3 432 2 Ree Oooo Oppo G4C461 e R474 O c R1405 9 J444 De er E432 4 452 1 O o Ao Q ooo DCH ala 0000 490 6 RAIL LO RAIL VMON 10V 1 2 EXT CLK ISO RAIL PCLR 150 5V RAIL HI FAULT LO EXT CLK ISO RAIL LO FAULT LO TP1 W RAIL LO WARN LO Figure 6 10 DC Rail Diode Assembly Component Locations sheet 2 of 2 425 1 RECTIFIER ZSNUBBER
128. rminals by separate leads to avoid mutual coupling effects Tables 2 2 through 2 8 provide the test procedures for verifying the 6811A B 6812A B 6813A B and the 6841A 6842A compliance with the specifications given in Appendix A of the User s Guide Please refer to the CALIBRATION PROCEDURE or TROUBLESHOOTING 1f you observe out of specification performance The performance test specifications are listed in the Performance Test Records at the end of this chapter You can record the actual measured values in the columns provided When performing the load tests select an adequate gauge wire using the procedures given in the User s Guide for connecting the load AGILENT O 3458A O 6811A B 6812A B 6813A B 6841A 6842 SENSE ala _ AGILENT 3458A RL 20 ohms for all rms Current Tests RL 250 ohms for 6811A B Load Test RL 120 ohms for 6812A B 6841A Load Test RL 51 ohms for 6813A B 6842A Load Test Rs Current Monitor resistor 0 01 ohms Switch is for convience not required Figure 2 1 Test Setup 10 Performance Tests 2 Procedures In the following procedures the term UUT means unit under test which can be either the 6811 A B 6812A B 6813A B 6841A or 6842A AC Source Table 2 2 Voltage Programming and Readback Accuracy Action Normal Result This procedure verifies that the voltage programming GPIB readback and Front Panel display functions are within specifications
129. run time errors that can occur at any time while the unit is running 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 power supply will continue normal operation if TST returns non zero value Table 4 2 Self Test Errors Error Possible Remedy 10 RAM selftest DAC selftest error expected lt n gt read reading Errors 11 12 13 14 15 apply to DACI2 1A and 1B Errors 16 17 18 apply to DACI2 2A Errors 19 20 21 apply to DACI2 2B Errors 22 23 apply to DACI2 4A Errors 24 25 apply to DACI2 4B Errors 26 27 28 apply to DAC12 3A and 3B Errors 29 30 31 apply to DAC12 5A and 5B Voltage selftest error C c Fan voltage failure Digital I O selftest error Re initialize unit and re calibrate If unit still has RAM error replace A8 DSP board Check A8 DSP and A10 Control assemblies TST programs 50 volts expected readback 50 1volt 0 lamp J gt Check fan and or fan voltage or replace A8 DSP assembly Run Time Errors Run time errors do not occur during self test but can occur at any time while the unit is running See Table 4 3 22 Troubleshooting 4 Table 4 3 Run Time Errors Possible Remed Outgrd not responding 201 Front pan
130. s not occur When working on the ac source 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 e Removing power from the ac source before removing or installing printed circuit boards Performance Tests Introduction This chapter provides test procedures for checking the operation of a model Agilent 6811AB 6812A B 6813A B AC Power Source Analyzer and Agilent 6841A 6842A Harmonic Flicker Test System The required test equipment Is specified and sample performance test record sheets are included Instructions are given for performing the tests using the front panel keypad Test Equipment Required Table 2 1 lists the equipment required to perform the performance tests in this chapter A test record sheet with specification limits and measurement uncertainties 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 te
131. sceivers Note that GPIB and RS232 use separate communication transceivers 26 Troubleshooting 4 A3 FET Board Troubleshooting Because test points on the FET board are not accessible when the board is installed troubleshooting must be performed with the board removed from the power supply Troubleshooting procedures are provided with both power removed and power applied The location of different test points are shown by encircled numbers on the A3 FET Board schematic and component location diagrams NOTE If any power FET Q201 204 Q211 Q222 Q233 0244 is defective you must replace all eight with a matched set Table 4 5 FET Board Troubleshooting With all power removed Turn the power supply off and remove the A3 FET board with See Disassembly Procedures its heatsink assembly attached see Disassembly Procedures E501 and common Rail 204 Q211 Q222 Q233 and Q244 and common Rail 5 Measure the resistance across the 15 V bias input E506 to Value should be approx in the E507 forward direction and 4900 reversed With signal from external waveform generator applied CMM collector case of each transistor to common E507 s Comecta waveform generator t0J200 1 and 1200 2 CC lC C 2 Set generator to produce a 20kHz 20Vp p triangular waveform See Figwe 43A U l Connect 15 V from an external Se to E506 positive and Value should Be ap
132. sembly Use T15 Torx screwdriver to remove screw holding A3 ACFET assembly to rear panel Slide A3ACFET assembly toward front of AC source and lift assembly up and out of unit To reinstall the A3 ACFET assembly perform the above steps in reverse order A4 AC Input Board Removal and Replacement a b C re cH P d Remove the outer and inner top covers as described earlier Remove the A2 GPB board as described earlier Remove the A3 ACFET assembly as described earlier Use 10mm Hex driver to disconnect ground wire connected to rear panel located under A2 GPIB board Remove red and black wires going to line choke Remove cable between J1035 and J335 on A6 Bias board Using a T15 Torx screwdriver remove 3 screws holding A4 AC Input board to chassis Slide A4 AC Input board toward the front of the unit and lift from chassis To reinstall the A4 AC Input board perform the above steps in reverse order A5 DC Rail Board Removal and Replacement 48 Remove the outer and inner top covers as described earlier Disconnect cables at J436 J400 J444 and 1445 Using T15 Torx screwdriver remove 5 screws holding A5 DC rail board to chassis Disconnect cable to J1232 or J1233 on power transformer board Mark which connector the cable was removed from Disconnect wires from rail choke 5080 2329 at A5 DC rail board The A5 DC rail board is labeled with wire color code To reinstall the A5 DC rail board perform the above steps in r
133. sts hazardous voltages may be present at the output of the unit Table 2 1 Test Equipment Required for Verification and Performance Tests Recommended Model Digital Voltmeter Resolution 10 nV 1V Agilent 3458A Readout 8 1 2 digits Accuracy 20 ppm 0 01 ohms 200 ppm 10 Watts Guildline 7320 15 Audio Analyzer Input Voltage 5 0mV TO 300V Agilent 8903A Distortion Accuracy 146 20Hz to 20khz Residual Distortion Noise 80db 0 0196 20Hz to 20kHz Frequency Counter Accuracy 1 KHZ lt 0 001 Agilent 5316B 30 1 ratio lt 50 ppm p Variable Voltage Power 1 Phase 3 4 Superior Powerstat Transformer Range 104 127V 47 63 Hz 207 253V 47 63 Hz Load Resistors 20 ohms 5 A 1000 W minimum 250 ohms 2 A 500 W minimum 120 ohms 2 5 A 750 W minimum 51 ohms 6 A 1800 W minimum GPIB Controller Full GPIB capabilities HP Series 300 or equivalent ratio transformer is not required for a valid MIL STD 56224 4 1 test The 30 1 ratio transformer is only required when a 4 1 test equipment ratio 15 desired using the Agilent 3458A voltmeter in the 1000 volt range 2 Performance Tests Current Monitoring Resistor A 4 terminal current monitoring resistor current shunt listed in Table 2 1 is required to eliminate output current measurement error caused by voltage drops in the load leads and connections Constant Voltage Tests If more than one meter or a meter and an oscilloscope are used connect each to the sense te
134. t 8161 0821 Oz s 8895 45 Droe o Se UU Soy Fe y 5 gt 0268 6690 5 0268 6690 4 V MOL V 0 NNA 9 ESCH 6 99 1906 0358 1906 0358 BUE ee 59 89 ie gus eo a ORS 2588 2588 CS 25588 eo se gt 2 wm one e ons one ons 22m rn sog vius T20 25688 gt 588 Wi x cei 9 a amp 8 ko 8 amp 8 E og uc s e Su 8 8 a O 888 5 o2 ER 55 v gt 4p oS 3 38 38 8 PN 8 08 28 lt ka lt 19 8 gl B EB A glee tee 55 b TSS 0299 55 En 85 x 185 8065 6690 EE 5 9066 6690 go eil v 961 GER G 96 y 25 Als y 9 6199 ie 0998 55 e 6 J7 2d 3 SS L L lt 5 3 8 8 Figure 6 15 Inverter Assembly Schematic Diagram sheet 1 of 2
135. t Figure 4 1 gives the overall procedures to isolate a fault to a circuit board or particular circuit See Figure 6 1 for the location of the circuit boards START TROUBLESHOOTING PROCEDURES TURN UNIT OFF DISCONNECT LOAD REMOVE OUTER COVER TORX T25 REMOVE INNER COVER TORX T15 TURN UNIT ON CHECK FOR ANY INDICATION AC POWER ON SEE FIGURES 6 8 AND 6 9 CHECK FUSE 4 1020 LINE SWITCH A4 E1048 CONNECTIONS TO L1050 LINE CHOKE CHECK A4TP1050 2 FOR 150VDC RAIL FOR 300VDC SEE FIGURES 6 12 amp 6 13 CHECK FUSE A6 F300 amp A6 F301 15Vpri 12Vpri FROM BIAS ASSY TO A4 ACINPUT ASSY IS AC INPUT ASSY LED ON note 1 CHECK FUSE A6F301 IS DISP LINE VOLTAGE SWITCH A4J353 SETTING SEE A6 BIAS BOARD TROUBLESHOOTING PRESS SHIFT KEY ON FRONT PANEL SHIFT ANNUNICIATOR LIGHTS CHECK 5 TO A8 DSP ASSY CHECK DRDX DTXD SIGNALS A11 TRIGGER ASSY U150 5 TO D COM J7462 2 ON A8 DSP ASSY U151 1 TO D COM J7462 2 ON A8 DSP ASSY U164 5 TO D COM J7462 2 ON A8 DSP ASSY 0163 6 H COM J114 2 ON A11 TRIG ASSY CHECK BIAS VOLTAGES 5V SEC 15V BIAS A9 OUTPUT A8 DSP 10 CONTROL ASSY GO TO A1 FRONT PANEL TROUBLESHOOTING PRESS SHIFT ERROR SEE TABLE 4 2 FOR SELF TEST ERROR MESSAGE v PROGRAM VOLT 120 Notes 1 View LED from lower left side of power supply OUTPUT ON
136. t VOLTAGE OFFSET 425 ENTER J822 9 near 0 V for 425 Vout SHIFT OUTPUT RST ENTER With the cable to J627 connected so that the ac source can output voltage and current Enter the following commands from the front panel VOLTAGE VOLT 300 ENTER OUTPUT ON J822 1 Vac 1 2 To check the J822 offset voltages enter the following commands from the front panel SHIFT OUTPUT OUTP COUP DC ENTER 3 VOLTAGE ALC DET RMS ENTER J822 12 3 0 Vdc VOLTAGE VOLT 0 ENTER 1822 12 near 0 V SHIFT OUTPUT RST ENTER With a short across the output terminals 4 Enter the following commands from the front panel VOLTAGE VOLT 5 ENTER OUTPUT ON J822 3 0 75 Vac SHIFT CURRENT CURR LEV 4 ENTER J822 3 0 23 Vac SHIFT OUTPUT RST ENTER Remove the short from across the output terminals 38 Troubleshooting 4 Table 4 8 Voltage Measurements at J822 viewed from circuit side of A10 control board range signal pin pin signal 5 to 0 02V Z inductance program 0 1 to 2 5V 20 to 1000 uH 0 8 to 4 9V normally 3 8V HS_MON 31 32 fan monitor 0 5 to 2V 0 100 fan speed normally 0 7 to 1V OV 0A out 4 9V 85A out MON RMS 0104 98 N N oo N t JN Fv Fv Ju NF o 25 to 24V 8 bit DAC common 1 pz aC reference 25 0 t02 5V 010 19 1 an See bias troubleshooting FAN_PROG 2 5 to 2 4V OV program 5 to 0 02V 448 to 2V pk out 15V bias 15V bias penc i 16 I PEAK PROG 4 99Vdc 0 to
137. t Front Panel Assembly Schematic Diagram sheet 2 of 2 J111 OOOO OOOOOOOOOOOO OOOOLI J110 D113 EB 107 IL 131 c E mi ge 0 17 vum m Im C104 C10 1 THEM C132 C134 C133 C131 I Il R132 9 T TIR115 RIGS R141 C124 R143 lt gt IMAGE BARCODE Figure 6 4 GPIB Assembly Component Locations FROM J112 FROM J112 50 GPIB CONTROLI UC T R PRX MSTX SERIAL LINK J108 TELE JACK 6 POS J109 TELE JACK 6 POS GERT LINK 1000PF 500 50 0102 50 20 1 TE Hx GND PE J110 E 1 5108 pps KE 2 8 13 07 3 2 14 D6 PD6 4 6 15 DS PDS 13 5 16 D4 PD4 14 4 17 D3 15 5 18 16 5102 PD2 HS 01 1 755 5160 12 0103 ucc scH 13 DIS GND TE Ve SRQ PSRQ ATN PATN HS EOI PEOI Hig DAV PDRU HS NRFC Wm me IFC 55 REN PREN 7551 5165 CONN MTG d E U106 ON OFF 90 SERIRL LINK W100 U106 0104 0105 0100 U101 0188 C123 124 125 126 0105 0109 50 0102 127 1000PF 1000PF 500 500 BYPA
138. the A7 inverter assembly and A10 control assembly voltage and current loops using an external DC power supply in place of the AC source 500 Vdc rail Service Kit 5063 2330 will be required to perform both procedures 1 Turn off the UUT AC source and remove cable 06813 80005 from A7 J627 This cable disconnects the 500 Vdc rail from the A7 Inverter assembly WARNING SHOCK HAZARD Unless you perform step 2 the 500 Vdc rail will still be present on the AS dc rail assembly during the slow start procedure 2 disable the 500 Vdc rail during the following tests disconnect cable 5080 2365 from A5 J400 This will remove the PWM drive to the A3 AC FET assembly and disable the 500 Vdc rail Then connect a jumper from 5 445 4 to A5 J445 10 This disables the RAIL LOW FAULT signal and allows the DSP assembly to function 3 Use the extender board from the service kit and raise the A8 DSP and A10 Control assemblies from the unit Verify that the A8 and A10 assemblies are functioning properly Refer to the A8 DSP and A10 Control assembly troubleshooting procedures 4 Ifthe A8 DSP and A10 Control assemblies check good turn off the unit and re install the A8 and A10 assemblies in the unit 5 Using cable 5080 2381 supplied in the service kit connect an external 60V 2A minimum DC power supply to the A7 Inverter assembly A7 J627 6 Turn on the unit and DC power supply 7 Setthe external DC supply for 0 volts and 2 amps current limit
139. trained personnel To avoid dangerous electrical shock do not perform any servicing unless you are qualified to do so Before switching on the instrument the protective earth terminal of the instrument must be connected to the protective conductor of the mains power cord The mains plug shall be inserted only in an outlet socket that 1 provided with a protective earth contact This protective action must not be negated by the use of an extension cord power cable that is without a protective conductor grounding Grounding one conductor of a two conductor outlet is not sufficient protection If this instrument is to be energized via an auto transformer for voltage change make sure the common terminal is connected to the earth terminal of the power source Any interruption of the protective grounding conductor or disconnection of the protective earth terminal will cause a potential shock hazard that could result in personal injury Whenever it is likely that the protective earth connection has been impaired this instrument must be made inoperative and be secured against any unintended operation Only fuses with the required rated current voltage and specified type normal blow time delay etc should be used Do not use repaired fuses or short circuited fuseholders To do so could cause a shock or fire hazard Do not operate this instrument in the presence of flammable gases or fumes Do not install substitute parts or perform any
140. unauthorized modification to the instrument Some procedures described in this manual are performed with power supplied to the instrument while its protective covers are removed If contacted the energy available at many points may result in personal injury Any adjustment maintenance and repair of this instrument while it is opened and under voltage should be avoided as much as possible When this is unavoidable such adjustment maintenance and repair should be carried out only by a skilled person who is aware of the hazard involved Capacitors inside this instrument may hold a hazardous charge even if the instrument has been disconnected from its power source 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 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 Direct current Terminal for Line conductor permanently installed equipment Alternating c
141. urrent VEN Caution risk of electric shock x Both direct and alternating current A Caution hot surface _ Three phase alternating current Caution refer to accompanying documents Earth ground terminal In position of a bi stable push control Frame or chassis terminal On supply N Terminal for Neutral conductor on Off supply permanently installed equipment Terminal is at earth potential Standby supply Used for measurement and control Units with this symbol are not completely circuits designed to be operated disconnected from ac mains when this switch is with one terminal at earth off To completely disconnect the unit from ac potential mains either disconnect the power cord or have a qualified electrician install an external switch Notice 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 Protective earth ground terminal Out position of a bi stable push control Intended for connection to external protective conductor This document contains proprietary information which is protected by copyright All rights are reserved No part of this document may be photocopied reproduced or translated into another language without the prior written consent of Agilent Technologies The information contained in this document is subject to change without notice Copyright 1995
142. y Component Locations E502 RAIL R277 R276 L RELS Zei 5x 5x 10 10W D201 C207 Bee D204 M C213 100PF 100PF 5000 5000 R205 R206 L201 220 0PF L213 R231 R233 34 ANY ARA ro 0211 0201 EN 1KU 0204 SEH rm ANY ANY x 75 5 1 e x Ze 1 44 1 44 L202 4 A EE EE N UN 1744 1 41 50 50 0810 5539 5x 5x R264 150 R203 5200 910 10 15 820 HD ZP apice 4000 4000 1800 E R282 VAL LA L205 61206 ANN t L209 210 R268 Zum UB R201 Reet teen DRIVE1 1 25 R232 217 218 U202 222 lt R275 60 4K R269 R270 9 3 3 1 1K 4201 1x SE 4 75 11 3K R204 YHn rv200 esos AED 1 44 500 360 HIN 5 FOR 1 96 e Lon Slus U204 12 R271 b ALT R222 XFMR SD 1 5 62 50 78201 T201 a 6 d 11 IR2110 Geer 3 C240 12 E UCC LIN R272 TN 96201 LIN UCC 01 10K 6 2U 220 221 1000 DRIUE2 XFNRS 28 XFMR1 XFMR2 Lues M C211 22 55 SE NOT LOCATED T LO 220 ON BORRD R286 HP32 BRIDGE TO HEATSINK BRIDGE R216 R217 DRIVER DRIVER K 150 oi MA PL 10 10 150 R262 R285 ZND 21 L207 L208 L212 0 180 5x 9252 1 44 R263 1 R283 R284 Hos R202 SR TaaooPF E C236 174W 2 1
143. y perform the above steps in reverse order A8 DSP Board and A10 Control Board Removal and Replacement a b re B 0 Remove outer and inner top covers as described earlier Disconnect cable from A7 Inverter assembly to J746 on the A8 DSP board Disconnect cables to J828 and J855 on A10 control board Disconnect cable to J115 on the A11 Trigger board Using T15 Torx screwdriver remove 3 screws holding A10 Control board to right side of chassis Lift A10 Control board from chassis Using T15 Torx screwdriver remove 6 screws holding A8 DSP board to A10 Control board To reinstall the A8 DSP and A10 control boards perform the above steps in reverse order 49 4 Troubleshooting A11 Trigger BNC Board Removal and Replacement a b d e j Remove outer and inner top covers as described earlier Disconnect cable from A10 control board to J115 Disconnect cables to J106 and J112 Mark cables to J106 and J112 before removing If the cables are reversed during replacement the ac source will not pass turn on self test Use 5 8 inch socket box wrench to remove nuts holding BNC connectors to rear panel Remove A11 Trigger board from unit To reinstall the A11 Trigger BNC board perform the above steps in reverse order A9 Output Board Removal and Replacement a b 50 Remove outer and inner top covers as described earlier Remove A7 Inverter assembly A8 DSP A10 Control and A11 Tri
144. zer 2 Turn on the UUT Program output voltage to CV annunciator on VOLT 100 FREQ 400 SHAPE SIN CURR MAX Select AC Level on the audio analyzer Record the output Readings are within specified limits frequency reading from counter and front panel display of 400 7 UUT Table 2 8 DC Voltage Programming and Readback Accuracy Normal Result This test verifies the DC voltage programming and front panel readback functions are within specifications Turn off the UUT Connect DVM directly to the output terminals DVM negative lead is connected to COM output terminal Disconnect the 30 1 transformer Open 51 2 Turnon UUT Program output voltage to VOLT 0 Output voltage at 425 Vdc OUTP COUP DC OFFSET 425 output current near zero Record dc voltage at DVM and readback from front panel Readings within specified dc display voltage programming and readback limits Program output voltage OFFSET 425 Output voltage at 425 Vdc output current near zero Record dc voltage at DVM and readback from front panel Readings within specified DC display voltage programming and readback limits 13 2 Performance Tests Table 2 9 Performance Test Record Agilent 6811A B Model Report No Date Test Description Minimum Results Maximum Meas Specification Specification Uncert Voltage Programming amp Readback Accuracy 300Vrms 45Hz 299 250 300 750 Front Panel Display Vrms 190mV Vrms 190mV 1 2mV 300Vrms

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