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Keysight Model 66332A Dynamic Measurement DC Source and

1. E casn 22 208 202 2 4 T 8151 8281 0168 4787 SMIG2AZ20 AM R429 R45 412 E mun VOLTAGE GAIN STAGE 1 E pome 2 twy a OUTPUT STACE 0698 1972 0698 8827 8698 3454 0169 4189 uso 2 25 S053HD NG0GF E 1 0316 2 1826 0643 NO LOAD Hn 5 C D a na e Vist 22K 9160 4818 een er EN 5 2570152 2 0150 5422 a SA1GIA331JAAH gg 9698 3444 S 0757 0407 0751 0418 82329 NT 9169 6808 SAZOSCATSMAAH 148309 cii cop R339 284382 E eae d 4189p 1000p 0157 0442 P 199K NORM 0306 e 0160 4831 9169 0153 2 1 R399 P 9 ma 2 e 0423 C385 0333 9698 6358 8 04 u 33 ES 4 SGA3EDSW I
2. 2 SENSE SCREEN 0330 FUSE HOLDER 77 1884 0310 2110 1107 50200X8RO08SE2AAZ pm 0313A ASSYH 06612 60006 C342 OUTPUT FILTER d 9157 1205 8358 x ES 23 3 1 9 0UT_P encom 27577 7115 0857 0168 2318 SHUNT CLAMP d 5002 3405 SG2OCXORBGOSB2AAZ 0UT 728505580088 0699 1797 308 8 1 5 CLAMP P 4 2 1 R466 iz TOMEG Raga 6 IM 698 8812 LOAD 2 gt 208 cae Y R394 7115 8057 7115 8857 TMP NO 148903 z 7 7 SG20CXGROBOSS2MZ 1205 1161 24914 0438 9596 0258 29 1 19 1826 1534 M 0339 E 0400 148908 H0313 s ca 1901 0987 4 No LOAD 2 2008 208 2001 tt 1981 8887 1981 8719 128 2 13 3 ns g501 esis zle e TH x 1 mH R474 148988 1884 8310 a 3808 288 201 Sal a 5 8160 5422 8159 0005 4328 3 t 5 LOAD REC p 148998 0381 0337 wis 6160 8231 4 3008 208 2001 314 3 4190 Fi E 0698 6369 a 4320 4 1252 0856 0168 8152 age an m 148908 Rel ay 28 80 4040 PHE2SSHAA4 ONROS 0314 ASSY 06612 60005 7116 0857 7175 0957 998 3542 9698 3634 5 6811 8929 i e Lion 4 i a p E S EP ida FP 68 57 Ww Law 5 0426 383 0432 148908 PCB 152666 ron 031
3. Test Facility Report Number Date Customer Tested By Model Ambient Temperature C Serial No Relative Humidity 90 Options Nominal Line Freguency Firmware Revision Special Notes Test Eguipment Used Description Model No Trace No Cal Due Date AC Source DC Voltmeter RMS Voltmeter Oscilloscope Electronic Load Current Shunt 2 Verification and Performance Tests Performance Test Record Forms Model Keysight 66332A OR Report No De Keysight6632B Test Description Minimum Results Maximum Measurement Specs Specs Uncertainty Constant Voltage Tests Voltage Programming and Readback Low Voltage 0V Vout 10 mV 10 mV Front Panel Display Readback Vout 3 mV Vout 3 mV High Voltage Full Scale Vout 19 980 V 20 020 V Front Panel Display Readback Vout 9 mV Vout 9 mV Load Effect 2mv 2mv mw Source Effect 05 PARD Ripple and Noise Peak to Peak 0 mV 3mV 872 RMS 0 0 3 mV 50 Transient Response Voltage in 100 us 0 mV 20 mV 3 mV Constant Current Tests Current Programming and Readback Low current Iout 2 0 mA 2 0 15 2 Iout 0 5 mA 15 2 pA 5 0045 A 818 7 Readback Accuracy Iout Iout 0 5 mA High Current Full Scale Iout 4 9955 A Readback Accuracy Iout Iout 10 5 mA Iout 10 5 mA 818 7 Current Sink Readback Isi
4. 100V 120 250V 2110 0055 220V 240 2 250V 2110 0002 be uen a _ m v SINK L L LOAD POWER RECTIFIER FILTER E mm AC LINE FILTER B E E 1901 1199 n THEAT T1 640900 1 1205 0782 en pet rm 327 W FUSE HOLDER LINE SWITCH 81 4 MUR1529 2110 0927 ge xr5on 8757 0403 0311 8300 0300 0430 WHTABRN GRN 640900 1 C382 x 5 rc mm Tan paie Je aaa 250566 1 irait MUR152G i Messen 2200p 0384 ud mU Tem cae PHEZBSNAAZZONROS 500 0168 5422 0160 4849 E 8160 8181 ense TN 0160 5002 NODD 8362 8887 8160 4259 128832 SA205C4T3HAAN Stern fr 350566 1 PHE2TING22K j IE EI E TO CHASSIS am m 2 SIN NO LOAD emo PHE2BSNA42280ROS i 640990 1 caer P ACC 0160 8181 1 WHT GRA 1251 6832 1 2 can H0310 1189 SternjS xfr gt ESO1Z 304 4 ES 0168 5422 ed odo AH 8 841 EXT Pisis 2 9362 8807 SAZOSCATIMAAH 4 0160 5422 ram et 2118 6697 160 802 Hys Mil SINK gao 8 1 25101871 A E oem 0309 im de 15 qum 4 1901 0987 8289 SAZOSCATIMAMA 303 aet 8180 3965 9189 3965 WHT BRN GRA 648980 1 5 4251 6832 1285 0350 TT T mes GRA 1304 5 F302 e SNO 0309 1 2 14 stenn xfr e E ru 2110 6687 pim R2S1015T1 CHEAT
5. DVM Scope DC Load resistor RMS voltmeter Ammeter for CV tests B DVM or F RMS voltmeter Pr F monitor for CC tests 3 0 Electronic DC xd Load Ammeter pru Note Use dc supply with same polarity connections for CC tests External Replace load with appropriate A resistor for CC noise test DC supply see note Figure 2 1 Test Setup 12 Verification and Performance Tests 2 Electronic Load Many of the test procedures reguire the use of a variable load capable of dissipating the reguired power If a variable resistor is used switches should be used to either connect disconnect or short the load resistor For most tests an electronic load can be used The electronic load is considerably easier to use than load resistors but it may not be fast enough to test transient recovery time and may be too noisy for the noise PARD tests Fixed load resistors may be used in place of a variable load with minor changes to the test procedures Also if computer controlled test setups are used the relatively slow compared to computers and system voltmeters settling times and slew rates of the power supply may have to be taken into account Wait statements can be used in the test program if the test system is faster than the supply Current Monitoring Resistor To eliminate output current measurement error caused by v
6. Figure 5 1 Mechanical Parts Identification 57 5 Replaceable Parts Table 5 3 A1 Control Board PC Board Assembly Designator Model Part Number Qty Description Al 66332A 6632B 5063 3431 1 Control PCA Tested Al 6633B 06633 61023 1 Control PCA Tested Al 6634B 06634 61023 1 Control PCA Tested C300 66332A 6632B 0160 5422 1 Cap 0 047 uF 20 C301 All 0160 5422 1 Cap 0 047 uF 20 C303 663324 6632B 0180 4756 1 Cap 18 000 uF 50V C303 6633B 0180 4815 1 Cap 2200 uF 160V C303 6634B 0180 4816 1 Cap 1200 uF 250V C304 66332A 6632B 0160 5422 1 Cap 0 047 uF 20 C305 All 0180 2980 1 Cap 1000 uF 50V C306 All 0180 4033 1 Cap 2200 uF 35 V C307 66332A 6632B 0160 5422 1 Cap 0 047 uF 20 C308 309 0160 5422 2 Cap 0 047 uF 20 C310 All 0180 4818 1 Cap 8200 uF 16V C311 312 0160 5422 2 Cap 0 047 uF 20 C313 663324 6632B 0180 4819 1 Cap 33 000 uF 25V C313 6633B 0180 4817 1 Cap 18 000 uF 16V C313 6634B 0180 4818 1 Cap 8200 uF 16V 314 66332A 6632B 0160 5422 1 Cap 0 047 uF 20 315 316 66332A 6632B 0160 5422 2 Cap 0 047 uF 20 C317 All 0160 5422 1 Cap 0 047 uF 20 C318 319 All 0180 4129 2 Cap 1 uF 35V C320 0180 4136 1 Cap 10 uF 20V 321 All 0180 4129 1 Cap 1 uF 35V C322 0160 5422 1 Cap 0 047 uF 20 323 0160 4831 1 Cap 4700 pF 10 C324 0180 4129 1 Cap 1 uF 35V 325 327 0160 5422 3 Cap 0 047 uF 20 C328 0160 5098 1 0 22 uF 10 C330 All 0160 4832 1 Cap 0 01 uF 1096 C331 332 66332A 66
7. Check U306B Yes See note Troubleshooting 3 OV_SCR pulse R438 low 5us Check Q318B R441 A2 Interface Board Reset the OV Shift Prot Clr and observe the OV SCR signal Each time OV is reset the unit will generate another OV signal The OV pulse OV SCR is approximately 5us long Yes Q318D Collector pulses high 5us No Check Q318A B and D and associated circuits Yes Check A1CR342 Figure 3 1 Sheet 11 Unit Does Not OV 35 3 Troubleshooting Disable the OV capability by shorting R351 After the protection is disabled program the output voltage to zero current to full scale and Output ON If the unit is in Protect mode Press Protect Clear The output should now go high and not trip the OV Is the CV annunciator on 2 Yes Measure voltage at the base Q303 with respect to its emitter V_mon should be approximately 66328 or 66332A Vout 4 25 6633B 6634B Vout 10 52 Vout 21 Vmon U315B 7 OK Check Voltage Monitor Amplifier 0315 circuit Yes gt A2 Interface Board Yes Check Voltage Control U315A circuit Voltage lt 0 6V No gt Troubleshoot Voltage Gain Stage Yes Troubleshoot Output Stage Figure 3 1 Sheet 12 High Output Volt
8. w Hora 289 072 sternjs xr 1115 0995 GP106044 SGZ0CKGROODSB2AAZ us s T INTERFACE 5V INTERFACE BIAS SUPPLY 5 1 gt SECONDARY 0 E3868 0698 0892 8352 9801 SO33RC2K 400F 350566 1 22 21 2031 0306 LU 1252 0963 sternjs xfr iy mi 3 RED 1901 0131 2 9362 9807 GP180844 350566 1 Huet 7826 1597 220V 240V 0306 LH294801 5 8 8352 9801 350566 1 E anm p Em LINE 1252 0863 C326 4 SHITCH SWITCH 1303 2 80414 UM n a 160 5422 0314 aj 9180 0329 SS2CXTR473H050C a 9180 3965 9 841 142 8160 5422 1901 8121 GP180844 34072 NO LOAD 1826 1593 T3 F304 0313 9309 anan ax 4303 3 42 8 E E SCREW HOLE 2110 0699 sternjs xfr 925108571 Figure 6 3 A1 Board schematic sheet 1 R451
9. E on HIGH RANGE CURRENT MONITOR AMP mew E un cs 0160 4189 prm P SAZOSCATINAMH E SA20504T3NAAH aw 0160 5422 ang 0160 4997 R385 R31 Pn am 25k Lond 6370 gt 4301 12 1 1 2 8699 0236 8699 8934 ma R N G C S E C T 307 11 50237425008 35 650 8168 5422 1 2 9698 4444 E Un 2 CLAMP P 8698 4444 OS_TRIM_NEG cast z z x ra RANGE SELECT 25k 8168 4791 6 34814 2 De 3 1826 1524 8699 0236 1826 1135 50237 2 5808 8 0 06 8 20504731 Sl RITS 8168 5422 699 0934 Sa 0757 0199 35 65 0160 4807 u388 0 SA102A108JAAH hs sz Fu 1 2 E ov_PROG myn CLAMP N eem 0157 0438 Em E OV SCRe 3159 0005 9797 6200 ND LOAD 1826 1594 4 PH INHIBIT 207 1 2 52 3K TUNNEL 1252 5911 3 mit THERMISTOR d 1826 1278 VETE d E 313 af 1 2 lt IHON H 7282 8425 E Grin oa 1826 0346 8757 0476 18K LN358N 9757 0442 471 mae 2 m LOAD E HS THERM x T H 0176 0471 ET n etaar 0 041 2 0160 5422 0160 5422 mE 1902 0960 1902 0968 m 208 R427 8151 8487 a T 9159 0005 Y ral me ASG INON CONP C gt Figure 6 3 A1 Board schematic sheet 2 VOLTAG E CONTROL
10. G302 base 5V Yes Q303 base gt 1 2V eas from Out 1V across R323 Yes Q307 collector to emitter 4V Yes y Check C331 C333 C339 and Q306 circuits Figure 3 1 Sheet 8 No Output Voltage continued 32 Check C330 R333 R346 and Q302 Check and Output Stage Check G301 0305 circuits Check G302 Q307 R324 and R326 Troubleshooting 3 Continued from sheet 7 CV_Prog R401 4 7V Check W7 A2 Interface Board Check Voltage Monitor Amplifier U315B circuit Check Voltage Control Circuit U315A Figure 3 1 Sheet 9 No Output Voltage continued 33 3 Troubleshooting CC_Prog R360 4 8V Yes Yes Continued from sheet 2 Imon_H U309A 6 Check A2 Interface Board Yes Check R473 Control Circuit Check Positive Current Check High Range Current Monitor Amplifier 34 Figure 3 1 Sheet 10 No Current Limit Program the output voltage and current to the full scale value and the OV to 1 2 prog 2V O A2 Interface Board cable W7 defective Check R350 C335 and U306B Check R349 R351 R356 C336 and U306 U306B 2 OV Low
11. Lw duy 108180 AO 2 H m ey d uow lt J duy 2 A E 0091 2063 ebe ced VIEO IX unus VLA 083 4 T AI 0 o Figure 4 2 1 Block Diagram 51 4 Principles of Operation Two current shunt resistors monitor the output current RmHi R473 monitors the high current range RmLo R403 monitors the low current range Shunt clamps connected in parallel across RmLo turn on at approximately 25 mA to limit the voltage drop at high currents The Range_Select signal sets the level at which switching occurs The output of the current monitor drives the level The SCR connected across the output will fire and short the output when an overvoltage condition is detected The SCR is controlled by the OV_SCR signal from the crowbar control circuit described in the next section The output filter capacitor provides additional filtering of the dc output Control Circuits As shown in Figure 4 2 the control circuits consist of the CV CC controls output voltage current monitor bias supplies and SCR control The CV CC control circuits provide a CV control loop a positive CC control loop and a negative CC control loop For an
12. VIEW 8160 5422 4 1858 0054 i o 3 RL SA205D4T3NAAN A a 3558 964 HU 8 e Svs eae os 8 E 0308 0310 0312 0317 0169 5422 2 U318 A wy SA20504T3HAAN y POS 5 0699 2245 8699 1518 10 d 1826 8346 PTF 5825K08AT d 5033R 1991 6050 342 Vise gem 5 1826 1818 BAVIO SELECTED E cua 8 041u 152618 16261078 0160 5422 al 8 SAZOSCATINAAH ase 8 R34 g 1826 2252 9169 5422 m 51 1k SAZOSCATINAAH 0757 8458 5043E051KIF EE v 5 ss Vase 8 ide U305 8 COL 150K i 1 2 8698 6520 oed 1826 1878 ec nemen 392 sk 1 2 0698 6320 CY IRTECTH Figure 6 3 A1 Board schematic sheet 3 4630 CONNECTOR 252 7987 J638 1252 7527 os 1252 7287 J638 das2 7087 vee 252 7987 J638 252 7987 J638 252 7987 J638 LII IJ CONNECTOR R63 1 252 7987 dem Connecter to Interface peb 78 0698 3439 471 REMOTE OUTPUT SENSE NORMAL NORMAL DUAL PATTERN OUT_A kegu A 5 OUT A CE a Regu 1 2 WE 1678 575 anu 471 OUT LP 33ohm SY Sw 2110 0757 0 0622 SENSE SENSE_A
13. 0306 8 gt 2350 1 2 and U306B Yes Go to sheet 5 Figure 3 1 Sheet 4 OV at Turn On 28 Continued from sheet 4 Connect a DC coupled scope across the output and press Protect Clear several times while observing the scope Pulses high No A1U306B 2 A1R438 OV 8 40 6V7 Yes Check A1CR342 G318A B amp D and associated components Yes Go to Troubleshooting High Output Voltage sheet 12 No U306B 8 3 8V No y Yes U306B 7 lt pin 8 Troubleshooting 3 Yes gt Check U306B A2 No y Check OV_Prog C335 R350 R354 Check R441 0318 A2 Interface Board Check R349 R351 R356 Note SCR is normally a pulse that goes low for 5us to trip the OV SCR CR342 Figure 3 1 Sheet 5 OV at Turn On continued 29 3 Troubleshooting Program output on voltage and current full scale then check output voltage FS Prot off and Output OK Yesb Calibrate unit No y Disable the protection feature by simultaneously pressing the 0 and 9 keys press the key until the display reads No Protect Off press the Up Arrow to display No Protect On then press enter Go to Troubleshooting Yes High Output
14. 3 0317 TRU 1901 1898 05 39 184159 100K 1 2 1 2 2 8151 8288 3149 8115 Vast sas 8751 0465 2150 32 8698 3456 y wi 1843 0656 1853 8656 1853 0656 1853 0656 m 0316 0421 Tiec 2360 Lenz 3 0384 9 041 0382 816 5422 0160 6300 438P331 3 yny 4700p 10800 r NO LO 2 piu 8168 4831 6150 0153 0301 16104724 1826 1378 2 hin Vies POSITIVE CURRENT CONTROL CKT qe 1 1854 0474 _ 1853 8497 203819 9757 9442 4 s 1854 0414 NO LOAD NO LOAD 2 283013 i NC 0355 dd 8 8tu eau 9757 0199 Pp 102 TAREA a gan S2329 NT L cas mum 8757 0198 E 8160 4832 8698 3441 0538 3441 SAIBICIG3KAAH exo 542 4 SAZOSCATINAAN Ram 42 a ee 3 0205 4 8168 4815 Rasa E 27 619k 619K 8 2 1 2 2 1 gt ac 8 1858 0954 0698 8959 9638 8959 0751 0442 1858 9854 SGS3HDE1SKOF 47 E N Hn 2 ES 1901 8033 TEN uo y 316 9698 0084 Dr 9698 3444 0324 1826 1378 ag 1 1902 0947 El Hu nd ga q ERVOLTACE DETECTION AND CONTROL ys 8 L p Tm A OVERV R360 R357 9 8 25k 22 22k ea a gt 5 U310 8 0639 224 0699 1510 paa 10 PTF SS2SKOGAT 16 5033 1826 1878 1991 8058 AT
15. 4 9 mA 252 5 20 mA Range Current Readback Readback Accuracy 0 A 2 5 pA 2 5 uA 0 1 Readback Accuracy 20 mA Tout 22 5 Tout 22 5 1 7 Readback Accuracy 20 mA Iout 22 5 Tout 22 5 1 7 250 1 6 0 25 mA 1 6 pA PARD Current Ripple and Noise RMS 0 mA Load Effect Source Effect 0 25 Enter your test results in this column 21 2 Verification and Performance Tests Model Keysight 6634B Report No Constant Voltage Tests Voltage Programming and Readback Low Voltage 0V Vout 50 mV Front Panel Display Readback Vout 12 mV High Voltage Full Scale Vout 99 9 V Front Panel Display Readback PARD Ripple and Noise Peak to Peak RMS Transient Response Time in 100 us Constant Current Tests Current Programming and Readback Low current Iout Readback Accuracy Iout Iout 0 25 mA High Current Full Scale Iout 0 999 A Readback Accuracy Iout Iout 2 3 mA Current Sink Readback Isink 2 9 mA 20 mA Range Current Readback Readback Accuracy 0 A 2 5 uA Readback Accuracy 20 mA Tout 22 5 Readback Accuracy 20 mA Tout 22 5 uA PARD Current Ripple and Noise RMS 0 mA Load Effect Source Effect 0 25 mA Enter your test results in this column 22 Maximum Measurement Specs Uncertainty 50 mV Vout 12 mV 100 1 V Tout 0 25 15 1 nA 1 001 A 128 8 uA
16. BN gt lt gt transformer 120 VAC 220 VAC grey grey white red gre white red grey grey jumper Front of unit Front of unit lt Side Side 9 transformer S 2 transformer 100 VAC 230 240 VAC white blue e i orange white grey 2 yellow grey white red Front of unit blue white red BIAS WIRING for all voltages 20009 Figure 3 3 Transformer Wiring 46 Principles of Operation Introduction This section describes the different functional circuits used in the dc power supply models covered in this manual First the I O external signals that connect to the Keysight power supply are described Next the overall block diagrams for the dc power supply are described in detail The simplified block diagrams in this section show the major circuits on the dc power supply as well as the signals between circuits They also show the reference designations of some of the components in the functional circuit These same reference designators are shown in the schematic diagrams in Section 6 I O Interface Signals Table 4 1 describes the interface signals between the power supply and the end user or other external circuits and devices Table 4 1 Power Supply Interface signals Front panel outputs OUT Positive DC output voltage OUT Negative DC voltage or return Rear panel 0UT Positive DC output voltage output sense screw
17. Error Message Table 3 2 No Go to Protect S Troubleshooting On OV at Turn on i sheet 4 No Check RI input A2 lt gt Interface board No No Disable OCP and Yes check for normal operation No Yes Go to sheet 2 No Yes Y Y For OT check fan Replace internal circuit thermal fuse E300 sensor RT301 Figure 3 1 Sheet 1 Main Flowchart Troubleshooting 3 Replace A3 Front No Panel Display board Go to 5 indicated but fuse is OK sheet 6 25 3 Troubleshooting Continued from sheet 1 Program Voltage and Current full scale enable output with no load Measure Voltage at output terminals isplay and measured oltage O Yes Load output to put unit into CC and measure output current with extrenal amp meter isplay and measured urrent O Voltage close to programmed Output Voltag near zero If output is OK but meter wrong replace A2 If both are off check gain of Voltage Monitor Amplifier ATU315B Yes Yes y y Go to Calibrate Voltage Troubleshooting No Output Voltage sheet 7 Current close to programmed Yes Yes Yes y y y Program OV below Calibrate Current 3 Goto output voltage Troubleshooting No Current limit shee
18. Manual Fan Speed Control Disabling Protection Features Post repair Calibration Inhibit Calibration Switch Calibration Password Initialization ROM Upgrade Identifying the Firmware Upgrade Procedure Disassembly Procedures List of Reguired Tools Cover Removal and Replacement A2 Interface Board Removal and Replacement Front Panel Assembly Removal and Replacement A3 Front Panel Board Removal and Replacement A1 Main Control Board T1 Power Transformer Removal and Replacement Line Voltage Wiring PRINCIPLES OF OPERATION Introduction Interface Signals A3 Front Panel Circuits A2 Interface Circuits Primary Interface Secondary Interface A1 Main Board Circuits Power Circuits Control Circuits REPLACEABLE PARTS LIST Introduction DIAGRAMS Introduction General Schematic Notes Backdating INDEX Introduction Organization This manual contains information for troubleshooting and repairing to the component level the Keysight Model 66332A Dynamic Measurement DC Source and the Keysight Model 6632B 6633B 6634B System DC Power Supplies Hereafter all models will be referred to as the dc power supply This manual is organized as follows Chapter 1 Organization Chapter 2 Performance tests Chapter 3 Troubleshooting procedures Chapter 4 Principles of operation on a block diagram level Chapter 5 Replaceable parts Chapter 6 Diagrams Safety Considerations WARNING Hazardous voltages exist within the dc power supply
19. SENSE_A 13 2w 8685 178 1 16 DO 0698 3439 1 5 471 33ohm 5X Sw 2110 0757 062a OUTPUT REVERSE DUAL PATTERN 158 049071678 0757 0284 871 REMOTE SENSE REVERSE 1627 178 1 16 1 2 de 0698 3439 8498 1485 471 4610 RLY_OPT 8 618 148851 REL_SEN_REM_N J610 148851 REL_OUT NORM 2 J610 148851 RLY SEN LOC c lt J618 148851 RLY_OUT_REV 618 148851 618 148851 RLY_SEN_REM_R J610 148851 J610 148851 Figure 6 4 A6 Relay Option Board schematic Index OUT 47 sense 47 A A board removal 45 A1 Main board 50 A2 board removal 44 A2 Interface Board 48 25201 50 A3 board removal 45 A3 Front Panel 48 ADC 48 bias voltages 38 39 cal denied 41 calibration 41 calibration post repair 41 CC 38 CC line regulation 17 CC load effect 18 CC load regulation 17 CC loop 52 CC noise 19 CC operation 17 CC source effect 18 CC_Detect 48 52 CC_Prog 50 52 clear password 41 component locations 1 71 72 73 74 A4 76 constant current tests 16 constant voltage tests 14 Control 50 52 copyrights 5 cover removal 44 current monitoring resistor 13 current sink 17 CV 38 CV load effect 14 CV loop 52 CV Noise 15 CV source effect 15 CV CC control 50 52 CV_Detect 48 52 CV_Prog 50 52 p DAC 48 d
20. sa 0332 bh bhi war as FAN DRIVER 7222 NO LOAD 15V AND 5V SECONDARY BIAS SUPPLIES m 68250 1295 0282 R522 42 9757 0436 8757 8438 698 4202 4 62225 471 323 f Rata 41880 8 AH 165 2 8160 4831 0312 2 0388 7115 0057 SATO1CATZKAAH 4 0 4 2 Lyd 304 302 avs E iy 51668 TP 122 22 21 2031 atemnys et 1252 0863 gt VR WR vR390 Are 1901 0731 M 1175 0057 GP106044 SO2OCXORGGGSB2AAU SH 1902 0955 1826 8105 60250 1826 0122 hes 5738815 1 0301 MCTBISCT MCTBOSCT s 2286 BE 381 i aj 9189 4033 ym RE 5 i 1991 0731 SMESSVB222M16X31N0 fu ga 3 aj 9189 4129 9 044 6180 43 BO 8 7322818593543 pieces 5 6168 5522 8 6180 1123 8698 3279 21201 SAZOSCATINAAH stennjl xer Ta220105K035A5 m dts DER PENNAR 414 1 ESO Og 1826 1533 1252 0863 1305 2 nw O jee ie Yo 22 21 2831 80381 J E 0383 Vass 1991 1098 1459 44 2 cys M 1252 0963 1981 0731 E 22 0307 oie wal C328 Ee PRIMARY AC LINE CONFIGURATION 68100344 SP Er ym 8 9180 4136 8189 2980 t 8 0791901 1991 1038 ns 1902 0957 UVXTHIGZNHA 14158 CVIEW FROM SIDE OPENING OF UNIT 058 YA 3 1826 9214 Ra cts 730035 1 1252 0963 22 21 2031 se a is 22 21 2091 1252 0963 1 2 1 2 1001 120 4305 3 g E
21. 0 047 uF 250v 20 Cap 0 22 uF Cap 0 047 uF 20 Cap 0 022 uF 20 Cap 1 uF 35V 100 pF 5 Cap 6 8 uF 63 V SCR Rectifier Assembly CR342 D330 ref CR342 Heat Sink ref CR342 SCR MCR69 3 ref CR342 Power Diode D330 SCR Rectifier Assembly CR342 D330 ref CR342 Heat Sink ref CR342 SCR MCR69 3 ref CR342 Power Diode D330 SCR Heatsink Assembly ref CR342 SCR 2N6402 ref CR342 Heat Sink Diode Diode Diode Diode Rectifier Assembly ref D308 Power Diode ref D308 Heat Sink Diode Rectifier Assembly ref D309 Rectifier ref D309 Heat Sink Diode Rectifier Assembly ref D310 Rectifier ref D310 Heat Sink Designator D310 D311 D311 D312 D313 314 D315 D316 D317 D317 D318 D318 D319 321 D322 D323 324 D325 D326 D327 328 D329 D330 D335 D336 337 D400 D470 471 D499 F300 301 F302 F302 F303 F303 F304 F305 F305 F400 406 F401 405 407 J303 J304 J305 J307 J309 J314 J414 7508 L300 301 Model 6633B 6634B 66332A 6632B 6633B 6634B 66332 6632 6633B 6634B 66332A 6632B 6633B 6634B 6633B 6634B 66332A 6632B 6633B 66332A 6632B 6634 66332A 6632B 6633B 66332A 6632B 6633B 6634B 66332A 6632B 6633B 6634B 66332A 6632B 6633B 6634B 66332 6632 66332 6632 Part Number 1901 1130 5060 3378 1205 0282 1901 138
22. 0 1 R490 6633B 0699 0070 1 Res 3 16M 1 R490 6634B 0683 6855 1 Res 6 8M 590 R493 All 0757 0438 1 Res 5 11K 1 R494 495 0698 8812 2 Res 1 Ohm 1 0 125 R496 66332A 6632B 0757 0289 1 Res 13 3K 1 R496 6633B 6634B 0757 0433 1 Res 3 32K 0 125W 68 Designator R497 R497 R498 500 R505 R510 517 R520 R521 R522 RT301 S300 T300 T300 U300 U301 U302 U303 U304 U305 U306 U308 U309 U310 U311 U313 U314 U315 U400 VR300 VR301 VR302 VR303 VR303 VR304 VR304 VR305 VR305 VR335 VR335 W300 301 Model 66332A 6632B 6633B 6634B 6633 66332A 6632B 6633B 6634B 66332A 6632B 6633B 6634B 66332A 6632B 6634 66332A 6632B 6633B 6634B 66332A 6632B 6633B 6634B 66332A 6632B 6633B 6634B 66332A 6632B 6633B 6634B Part Number 0757 0289 0757 0433 0757 0407 Not Used 0811 1672 Not Used Not Used Not Used 0837 0397 3101 2927 9100 4350 8159 0005 5060 3229 1826 0214 1205 0282 5063 2389 1826 1597 1205 0402 5060 2948 1205 0282 1826 0122 1826 1533 5060 3232 1826 0106 1205 0282 1826 0346 1826 1370 1826 1534 1826 3521 1826 2252 1826 3521 1826 1878 1826 3521 1826 1878 1826 0643 1902 0955 1902 0957 1902 3092 1902 0953 1902 0958 1902 0943 1902 0947 1902 0943 1902 0947 1902 0953 1902 095
23. 047 pF C427 4700 pF C340 0 01 uF C428 430 0 047 uF 0 047 uF C344 346 0 047 uF 0 022 uF 0 022 uF C431 432 0 22 uF C349 352 10 pF 0 033 uF 0 033 uF C482 0 022 uF 0 022 uF C359 10 pF 22 pF 22 pF C499 6 8 uF C360 10 pF 15 pF 10 pF D319 320 321 Diode Diode C361 33 pF D330 Diode Diode C362 180 pF 220 pF 120 pF D400 Diode C372 373 0 047 uF D499 Diode Diode C375 0 047 uF F400 406 0 Ohm C376 377 0 047 uF 0 022 uF 6800 pF L300 301 22 uH C378 0 047 uF Q312 319 Transistor C382 100 uF 50 uF 22 uF R300 3K 12K C383 1 uF R301 302 121 Ohm 511 Ohm C403 10 pF R313 4 7 Ohm 10 Ohm 71 6 Diagrams Table 6 1 Model dependent Components continued Designator 66332A 6633B 6634B Designator 66332 6633B 6634B 6632B 6632B R319 316 Ohm 511 750 Ohm R413 10K R320 1 5K 2 61k R415 22K R321 80 6K 215k 340k R418 51 1 R323 1K 5 11 14 7K R421 3 3 Ohm R324 1K 5 11 5 11K R422 133K R325 1K 14 7K 5 11K R423 429 10K R326 5 62K 26 1K 26 1K R425 402K R328 20K 10 Ohm 10 Ohm R427 10K R329 4 7 Ohm 30 1K 51 1K R428 R330 1K 14 7K 14 7K R430 52 3K R333 5 11K 8 25K 8 25K R432 1K R334 0 Ohm R433 139 Ohm R337 316 Ohm 316Ohm 750 Ohm R434 0 Ohms R339 10K 51 1k 215K R436 437 Ohms R340 200 Ohm 432 Ohm 1K R439 500 Ohm R341 343 215 Ohm 432 Ohm 1K R440 3 3 Ohm R342 80 6K 287K 464K 442 443 40 R348 316 Ohm 632 Ohm 1 5K R445 0 51 Ohm R349 26 1K 80 6K 130K R446 2 5K R350 3 16K 3 92K 3 16K R447 499 Ohm R351 5K 6 2K 5K R449 0 Ohm R352 0 Oh
24. 0535 0031 0460 2362 0380 2086 8160 0916 1252 3056 5962 0872 5962 8108 1 a NWA Oty Description Chassis Front Panel Assy Std unit Front Panel Assy Option 020 Knob 6mm Keypad Binding Post Single Red Nameplate 66332 Nameplate 6632B Nameplate 6633B Nameplate 6634B Top Cover Strap Handle Cap front Strap Handle Cap rear Strap Handle Barrier Block Cover Terminal Block 4 Position RI DFI Fan Spacer G10 Main Heat Sink Thermal Insulator Screw M4x0 7x8mm T15 Pan Conical washer Spring Clip Insulator Rear Label Foot Screw M5x0 8x10mm Flat Patch Lock Screw M5x0 8x10mm Pan Patch Lock Relay Option Bracket Binding Post Plate Nut Hex 3 8 32 Nylon Nut Hex w Lockwasher 6 32 Side Trim Stud Mounted Standoff Washer Helical Lock 10 Washer Flat 10 Transformer Bracket Transformer Shim Cable Clip Screw M4x0 7x10mm Torx T15 Pan conical washer Screw M3x0 5x6mm Torx T10 Flat Patch Lock Screw M3x0 5x8mm Torx T10 Thread Rolling Screw M3x0 5x10mm Torx T10 Pan conical washer Nut Hex w lockwasher M3x0 5 Foam Pad Standoff snap in RFI Clip Screw Lock Kit ref RS232 Connector Operating Guide Programming Guide Replaceable Parts 5 ues 2 Places Option 020 2 Places LJETLIETEJICAC TEM 2 o o o
25. 0757 0280 0698 3279 0698 4202 0757 0280 0757 0442 0698 3156 0686 2225 0698 0092 0683 0475 0757 0346 0757 0442 8159 0005 0757 0401 8159 0005 0698 3444 0757 0416 0757 0420 0757 0427 0698 0085 0757 0280 0698 4509 0698 3454 0698 4536 0757 0280 0757 0280 0757 0438 0698 3156 0757 0280 0757 0438 0757 0280 0698 3156 0757 0438 Oty 925 Replaceable Parts 5 Description Transistor NPN Transistor NPN Transistor FET Transistor PNP Transistor PNP Transistor Array Transistor PNP Res 5 2W MO Res 33K 590 2W MO Res 121 Ohm 1 0 125W Res 511 1 0 125W Res 2k 1 0 125W Res 121 Ohm 1 0 125W Res 511 1 0 125W Res 2k 1 0 125W Res 1K 1 0 125W Res 4 99K 1 Res 8 87 1 Res 1K 1 0 125W Res 10K 1 0 125W Res 14 7 1 Res 2 2K 5 0 5W Res 2 61K 1 Res 4 7 Ohm 596 0 25W Res 10 1 Res 10K 1 0 125W Jumper Res 100 Ohm 1 0 125W Jumper Res 316 Ohm 1 0 125W Res 511 1 Res 750 1 Res 1 5K 1 0 125W Res 2 61k 1 Res 1k 1 Res 80 6K 1 Res 215k 1 Res 340k 1 Res 1K 1 0 125W Res 1K 1 0 125W Res 5 11K 1 Res 14 7K 1 Res 1K 1 0 125W Res 5 11K 1 Res 1K 1 0 125W Res 14 7K 1 Res 5 11K 1 63 5 Replaceable Parts Designator Model Part Number Qty Description R326 66332A 6632B 0757 0200 1 Res 5 62K 1 R326 6633B 6634B 0698 3159 1 Res 26 1 1 R327 All 0757 0280 1 Res 1K 190 0 125W R3
26. 3245 1 Darlington Fan Driver Assembly 1854 0828 1 ref 0300 Transistor NPN SI 1205 0282 1 ref 0300 Heat Sink 0301 66332A 6632B 6633B 1854 0474 1 Transistor NPN 0301 6634 1854 0575 1 Transistor NPN 0302 66332A 6632B 6633B 1854 0474 1 Transistor NPN 0302 6634 1854 0575 1 Transistor NPN 0303 66332A 6632B 06612 60008 1 Transistor Driver Assembly 1854 0872 1 ref 0303 Transistor NPN 1205 0350 1 ref 0303 Heat Sink 0303 6633B 06633 60009 1 Assembly Transistor Heat Sink 1854 0920 1 ref 0303 Transistor NPN 1205 0571 1 ref 0303 Heat Sink 0303 6634B 06634 60009 1 Transistor HS Assembly 1205 0571 1 ref 0303 Heat Sink 1854 0838 1 ref 0303 Transistor NPN 0304 66332A 6632B 06612 60009 1 Transistor Driver Assembly 1205 0350 1 ref Q304 Heat Sink 1853 0497 1 ref Q304 Transistor PNP 0304 6633 5063 3451 1 Assembly Transistor Heat Sink 1853 0652 1 0304 Transistor PNP 0304 1205 0571 1 ref 0304 Heat Sink 0304 6634B 5063 3451 1 Transistor HS Assembly 1853 0652 1 ref Q304 Transistor PNP 0304 1205 0571 1 ref 0304 Heat Sink 0305 1858 0054 1 Transistor Array 0306 1853 0336 1 Transistor PNP 0307 1853 0086 1 Transistor PNP 0308 66332A 6632B 1854 1174 1 Transistor NPN 0308 6633B 6634B 1854 1362 1 Transistor NPN 0309 66332 6632 1854 1174 1 Transistor NPN 0309 6633B 6634B 1854 1362 1 Transistor NPN 0310 66332 6632 1853 0656 1 Transistor PNP 0310 6633 6634 1853 0772 1 Transistor PNP 0311 66332 6632 1853 06
27. A4 C603 604 J615 MP5 MP26 MP25 MP24 WIS Designator A5 C500 C501 502 F500 F500 J508 XF500 Designator A6 C600 C601 602 F601 602 J610 K601 603 K604 605 R601 602 R603 R604 R605 R606 R607 0601 W10 70 Table 5 4 Binding Post Option 020 Model Part Number Qty Description 6633B 6634B 5063 3406 1 Binding Post PCA 66332A 6632B 06611 60022 1 Binding Post PCA All 0160 8153 2 Cap 4700 pF 1252 0056 1 4 Pin Connector 1510 0091 2 Binding Post Single Red 0590 0305 2 Nut Hex 6 32 w Lockwasher 2950 0144 2 Nut Hex 3 8 32 Nylon 06612 00004 1 Binding Post Plate 06612 80010 1 Cable A1 J314 to A4 J615 Table 5 5 5 AC input RFI Board Model Part Number Oty Description 5063 3433 1 ACInput RFI PCA All 0160 4259 1 Cap 0 22 uF 10 0160 8181 2 Cap 0 0022 uF 2110 0055 1 Fuse 4AM 250V 100Vac and 120Vac input 2110 0002 1 Fuse 2AM 250V 220Vac and 230Vac input 1252 3771 1 ACLine Module 2110 0927 1 Fuseholder with cap Table 5 6 Relay Option 760 Model Part Number Qty Description All 5063 3434 1 Relay PCA Tested 0160 5422 1 0 047 uF 20 0150 0081 2 Cap 0 01 uF 2110 0671 2 Fuse 0 125 125V 1252 7643 1 Connector 0490 1405 Relay 2C 12VDC 0490 1670 2 Power 0686 2215 2 220 Ohm 5 0 5W 0698 3439 1 Res 178 Ohm 1 0 125W 0757 0284 1 Res 150 Oh
28. Figure 6 1 A1 Board Component Locations 40 WATT ONLY 100 WATTS ONLY L601 1602 MMN J615 1 cr C601 C607 C603 C605 7 01 220PF 4200PF _ 220PF 5000 2000 2500 1KU E316 O GND C602 C608 C604 C606 01 220PF 4200PF Tae0PF 500U 200U 250U 1KU J615 3 1605 gt J615 4 L604 BP2 e 0 R6060 e e e 5604 9 e 00000 42 gt 29000 e e e o o O K601 5 e ee 5 e e o ee K603 e o SE 6 R602 Fe 620 o e I BP1 C603 e o Figure 6 2 A4 and A6 Board Component Locations LINE VOLTAGE FUSE RATING PART NUMBER
29. Res 51 1 1 R348 66332A 6632B 0698 3444 1 Res 316 Ohm 1 0 125W R348 6633B 0698 4187 1 Res 632 1 R348 6634B 0757 0427 1 Res 1 5K 1 R349 66332A 6632B 0698 3159 1 Res 26 1K 1 R349 6633B 0698 4509 1 Res 80 6K 1 R349 6634B 0757 0468 1 Res 130K 1 R350 66332A 6632B 0757 0279 1 Res 3 16K 1 R350 6633B 0757 0435 1 Res 3 92K 1 R350 6634B 0757 0279 1 Res 3 16K 1 64 Designator R351 R351 R351 R352 R353 R354 R354 R354 R355 R356 R356 R356 R357 R357 R358 R359 R360 361 R362 R362 R363 R364 R364 R365 366 R367 R370 R371 R371 R372 R372 R373 R374 R375 R376 R376 R377 R377 R378 R378 R379 R380 R381 R382 R383 R384 R384 R385 R385 Model 66332A 6632B 6633B 6634B 66332A 6632B 66332A 6632B 6633B 6634B 66332A 6632B 6633B 6634B 66332A 6632B 6633B 6634B 66332A 6632B 66332A 6632B 6633B 6634B 66332A 6632B 6633B 6634B 66332A 6632B 6633B 6634B 66332A 6632B 6633B 6634B 66332A 6632B 66332A 6632B 6633B 6634B 66332A 6632B 6633B 6634B 66332A 6632B 6633B 6634B 66332A 6632B 6633B 66332A 6632B 6633B 6634B Part Number 0698 6320 0698 5087 0698 6320 8159 0005 0698 8959 0757 0447 0757 0458 0698 4509 0698 0084 0757 0472 0757 0270 0757 0472 0699 2246 0699 1510 8159 0005 0699 2246 0698 8807 0699 1513 0757 0473 0699 2246 0699 1510 0698 6392 0757 0436 0757 0442 0699 0934 0699 2246 06
30. exist even with the power cable removed To avoid injuries always disconnect power discharge circuits and remove external voltage sources before touching components DO NOT SERVICE OR ADJUST ALONE Do not attempt internal service or adjustment unless another person capable of rendering first aid and resuscitation is present Any adjustment maintenance and repair of this instrument while it is opened and under voltage should be avoided as much as possible When this is unavoidable such adjustment maintenance and repair should be carried out only by a skilled person who is aware of the hazard involved DO NOT SUBSTITUTE PARTS OR MODIFY INSTRUMENT Because of the danger of introducing additional hazards do not install substitute parts or perform any unauthorized modification to the instrument Return the instrument to a Keysight Technologies Sales and Service Office for service and repair to ensure that safety features are maintained SAFETY SYMBOLS Refer to the table on the following page WARNING The WARNING sign denotes a hazard It calls attention to a procedure practice or the like which if not correctly performed or adhered to could result in personal injury Do not proceed beyond a WARNING sign until the indicated conditions are fully understood and met Caution The CAUTION sign denotes a hazard It calls attention to an operating procedure or the like which if not correctly performed or adhered to could result in damage
31. for 71 7 counts E14 12 bit DAC test failed 4095 is written to DAC U241A A2 Interface Bd and B ADC U242 is checked for 10 7 counts E15 8 bit DAC test failed 10 and 240 are written to DAC A2 Interface Bd U244 ADC U242 is checked for 10 and 240 7 counts E80 Dig I O test failed SEC PCLR written low and high A2 Interface Bd read back through Xilinx E213 RS 232 input buffer overrun A2 Interface Bd E216 RS 232 framing error A2 Interface Bd E217 RS 232 parity error A2 Interface Bd 37 3 Troubleshooting CV CC Status Annunciators Troubleshooting The CV CC annunciators are particularly helpful when troubleshooting a unit with no output If the unit has no output voltage or current and one of the annunciators is on then the problem is in the control circuit associated with that annunciator An example of how this might be useful would be in a case where the voltage and current are programmed to some positive value there is no output voltage and the CV annunciator is on This indicates that the problem is probably in the Voltage Amplifier circuit If the CC annunciator were on then the problem would likely be in the Current Amplifier If UNR is indicated then neither the voltage nor the current circuits are in control and the problem would be in circuits after the gating diodes such as the driver or output regulator stages When troubleshooting the CV CC status annunciators or the status readback circuits first measure the volt
32. from driver Q304 located in the voltage gain stage The voltage gain stage is controlled by a signal from the control circuits A positive going signal to the voltage gain stage makes the output more positive A negative going signal to the voltage gain stage makes the output more negative The Turn on control signal to the voltage gain stage simply keeps the output of the unit turned off for about 100 milliseconds at power turn on while the microprocessor is initializing the unit 50 Principles of Operation 4 josjeS abuey P uow ued uleu SH LAUT Wd AO 198199 AO AD UOUA A uouA 8cEQ 199190 NOD NOD Ben 50 duy Ban oo 22 H uou lt lt Ds Buy IH 04005 A Ue Ue uo uiny gt onuo 99 9 80 cord abbeys ized i lt 01002 2 04 AST duy low Bug o 124405 xHO AO MOID esnj AO AO poses
33. incidental or conseguential damages in connection with the furnishing performance or use of this material This document contains proprietary information which is protected by copyright All rights are reserved No part of this document may be photocopied reproduced or translated into another language without the prior written consent of Keysight Technologies Copyright 1997 2000 2014 Keysight Technologies Printing History The edition and current revision of this manual are indicated below Reprints of this manual containing minor corrections and updates may have the same printing date Revised editions are identified by a new printing date A revised edition incorporates all new or corrected material since the previous printing date Changes to the manual occurring between revisions are covered by change sheets shipped with the manual In some cases the manual change applies only to specific instruments Instructions provided on the change sheet will indicate if a particular change applies only to certain instruments June 1997 Edition Lct September 2000 Edition eie cre ete December 2014 Instrument ldentification The power supply is identified by a unigue serial number such as US36310101 The items in this serial number are explained as follows US36310101 The first two letters indicate the country of manufacture US United States The next four digits are the year and week of ma
34. status annunciators 38 Temp_Amb 50 test eguipment 11 test setup 12 trademarks 5 transformer removal 45 transient recovery 16 troubleshooting bias and reference supplies 38 39 troubleshooting eguipment 24 troubleshooting flowcharts 24 troubleshooting introduction 23 troubleshooting overall 24 troubleshooting status annunciators 38 U UNR 38 V verification tests 13 VMon 50 52 voltage programming 14 W warranty 2 This information is subject to change without notice Keysight Technologies 1997 2000 2014 Edition 3 December 2014 KEYSIGHT TECHNOLOGIES 5962 8119 www keysight com
35. steps f and h is the source effect voltage and should not exceed the value listed in the performance test record chart for the appropriate model under CV SOURCE EFFECT CV Noise PARD Periodic and random deviations PARD in the output ripple and noise combine to produce a residual ac voltage superimposed on the dc output voltage CV PARD is specified as the rms or peak to peak output voltage in the freguency range specified in the User s Guide a Turn off the supply and connect the output as shown in Figure 2 1a to an oscilloscope ac coupled between the and the terminals Set the oscilloscope s bandwidth limit to 20 MHz and use an RF tip on the oscilloscope probe b Turn on the supply and program the current to the maximum programmable value and the output voltage to the full scale value Adjustthe load for the full scale current value as indicated on the front panel display d Note that the waveform on the oscilloscope should not exceed the peak to peak limits in the performance test record chart for the appropriate model under CV NOISE PARD Disconnect the oscilloscope and connect an ac rms voltmeter in its place The rms voltage reading should not exceed the RMS limits in the performance test record chart for the appropriate model under CV NOISE PARD 2 Verification and Performance Tests Transient Recovery Time This test measures the time for the output voltage to recover to within the specified va
36. 03 R473 b A2Interface Board If the Interface board A2 is replaced the supply must be initialized first see Initialization later in this chapter and then be calibrated Inhibit Calibration Switch If CAL DENIED appears on the display when calibration is attempted or if error code 401 occurs when calibrating over the GPIB the internal INHIBIT CAL switch has been set This switch setting prevents unauthorized or inadvertent power supply calibration You must reset this switch in order to calibrate the supply This four section switch S201 is located on the A2 Interface board near the GPIB connector The switch has 2 functions related to calibration One is Inhibit Calibration With this switch set the supply will not respond to calibration commands thus providing security against unauthorized calibration The other switch allows you to bypass the password in case it is forgotten 4321 5201 Off Calibration Calibration Password ON Clear Password Inhibit In order to enter the calibration mode you must use the correct password as described in Appendix B of the Operating Manual As shipped from the factory the number O zero is the password If you use an incorrect password OUT OF RANGE will appear on the display for front panel calibration or error code 402 occurs for GPIB calibration and the calibration mode will not be enabled If you have changed the password and have forgotten it you can set the
37. 0698 6392 1 Res 22K 0 1 0 125W R415 6633B 6634B 0699 1510 1 Res 22 22K 0 1 125W R416 All 0686 7515 1 Res 750 Ohm 5 0 5W R417 All 0757 0442 1 Res 10K 1 0 125W R418 66332A 6632B 0757 0458 1 Res 51 1 1 R418 6633B 0698 3201 1 Res 80K 1 R418 6634B 0698 5092 1 Res 160K 196 R419 0757 0442 1 Res 10K 1 0 125W R420 0699 1972 1 Res 1 74M 0 1 0 125W 66 Designator R421 R421 R422 R423 R423 R425 R427 R427 R428 R429 R429 R430 R431 R432 R432 R432 R433 R434 R435 R436 437 R438 R439 R440 R440 R441 R442 R442 R442 R443 R443 R443 R444 R445 R445 R445 R446 R446 R446 R447 R448 R449 R450 R451 R452 R452 R452 R453 R454 Model 66332A 6632B 6633B 66332A 6632B 66332A 6632B 6633B 6634B 66332A 6632B 66332A 6632B 6633B 6634B 6634B 66332A 6632B 6633B 6634B 66332A 6632B 66332 6632 6633 6634 66332 6632 66332 6632 66332 6632 66332 6632 66332 6632 6633B 6634B 66332 6632 6633 6634 66332 6632 6633 6634 66332 6632 6633 6634 66332 6632 6633 6634 66332 6632 66332 6632 66332 6632 66332 6632 6633 6634 66332 6632 Part Number 0811 1672 0811 2553 0698 6351 0699 0267 0699 0278 0698 4539 0757 0442 8159 0005 0698 3642 0699 0267 0699 0278 0757 0272 0757 0438 0757 0280 0698 0084 0757 0438 0698 4099 8159 0005 8159 0005 0811 1672 8159 000
38. 08 Bu 1 2 1 2 CUT 4 JUMPERS FOR E m m 0699 4055 CUT 6 JUMPERS FOR RELAY OPTION 8168 7562 58332 IMON P BINDING POST OPTION 845 139 0366 5 1 1826 1135 a 1 2 T3228105K835AS i 8 25K 1 0698 8812 8188 4123 R444 0157 0441 SAZOSCATIMAAN S 280 Chessis tu 5 11k 0168 5422 8362 8887 Gnd C388 8157 0438 3 350566 1 5843ED5K11F 1858 0074 6 1 469 009 iod p 0005 24d V 12 an 0160 4012 9538 4123 P As2 To INTERFACE PCB LOW RANGE CURRENT MONITOR AMP CV_DETECT 07 28 EM DETECTe gt 0160 4901 CC_DETECTe 2207 26 A oe 1 2 VOL a OLTAGE MONITOR AMP T 483 NO LOAD SAZOSCATIMAMH R382 1 2 PROG as 0686 2225 9160 5422 108 n i 9693 9642 79 R488 R489 R490 14 5625 88 16 15 LI 1 J 8 8151 0481 1 JL 2 e WEN 1 2 1 2 1 As 6354 E 207 22 0699 9730 0699 8730 8 SAGARA i 6698 3922 8698 3922 ARN E 9169 5422 2 ana predi EOM SAZOSCATINAMH R396 E AST 2 1 68871 6 2 3 2 5K 8699 1866 5 1826 1135 1 2 E 3698 8093 0598 5631 4 2390 8169 4181 d ne 387 19 ES Ea E 8 Ta 1 s 0160 4801 hs ES Li oin Res ase R380 292CC0G 1861088 m E 8168 5422 1 8 5 1 1 4387 17 1 1 2 1826 1878 8698 8893 8698 6631 ier ai Mom
39. 1 Cap 10 pF 5 100V C360 6633B 0160 4789 1 Cap 15 pF 5 100V C360 6634B 0160 4791 1 Cap 10 pF 5 100V 361 66332A 6632B 0160 4807 1 Cap 33 pF 596 100V C362 66332A 6632B 0160 4813 1 Cap 180 pF 5 C362 6633B 0160 4812 1 Cap 220 pF 590 100V C362 6634B 0160 4800 1 Cap 120 pF 5 C363 All 0160 4807 1 Cap 33 pF 596 100V C364 0160 5422 1 Cap 0 047 uF 20 C365 0160 5471 1 Cap 0 1 uF 5 50V C366 367 All 0160 4791 2 Cap 10 pF 596 100V C368 All 0160 4789 1 Cap 15 pF 5 100V C369 All 0160 6827 1 Cap 0 022 uF 400V C370 All 0160 5422 1 Cap 0 047 uF 20 C371 All 0160 4812 1 Cap 220 pF 5 C372 373 66332A 6632B 0160 5422 2 Cap 0 047 uF 20 374 All 0160 5422 1 Cap 0 047 uF 20 C375 66332A 6632B 6633B 0160 5410 1 Cap 3300 pF 596 C375 6634B 0160 5422 1 Cap 0 047 uF 20 C376 66332A 6632B 0160 5422 1 Cap 0 047 uF 20 C376 6633B 0160 4918 1 Cap 0 022 uF 20 C376 6634B 0160 6616 1 Cap 6800 pF 20 C377 66332A 6632B 0160 5422 1 Cap 0 047 uF 20 C377 6633B 0160 4918 1 Cap 0 022 uF 20 C377 6634B 0160 6616 1 Cap 6800 pF 20 C378 66332A 6632B 0160 5422 1 Cap 0 047 uF 20 C379 0160 8153 1 4700 C380 0180 4129 1 Cap 1 uF 35V 381 0160 8153 1 Cap 4700 pF C382 66332A 6632B 0160 8231 1 Cap MET 100 uF C382 6633B 0160 8299 1 Cap 50 uF 70V C382 6634B 0160 8230 1 Cap 22 uF 150V C383 66332A 6632B 0160 5469 1 Cap 1 uF 1096 50V C384 0160 4789 1 15 pF 5 100V C386 0160 4787 1 22 pF 5 100V 59 5 Replaceable Pa
40. 28 66332A 6632B 0683 0475 1 Res 20 1 0 125W R328 6633B 6634B 0757 0346 1 Res 10 1 R329 66332A 6632B 0757 0449 1 Res 4 7 Ohm 596 0 25W R329 6633B 0757 0453 1 Res 30 1K 1 R329 6634B 0757 0458 1 Res 51 1 1 R330 66332A 6632B 0757 0280 1 Res 1K 1 0 125W R330 6633B 6634B 0698 3156 1 Res 14 7K 1 R331 All 0757 0280 1 Res 1K 1 0 125W R332 All 0757 0199 1 Res 21 5K 1 R333 66332A 6632B 0757 0438 1 Res 5 11K 1 R333 6633B 6634B 0757 0441 1 Res 8 25K 1 R334 66332A 6632B 8159 0005 1 Jumper R335 All 0757 0438 1 Res 5 11K 1 R336 All 0757 0280 1 Res 1K 1 0 125W R337 66332A 6632B 6633B 0698 3444 1 Res 316 Ohm 1 0 125W R337 6634B 0757 0420 1 Res 750 1 0 125W R339 66332A 6632B 0757 0442 1 Res 10K 1 0 125W R339 6633B 0757 0458 1 Res 51 1k 1 0 125W R339 6634B 0698 3454 1 Res 215K 1 0 125W R340 66332A 6632B 0757 0407 1 Res 200 Ohm 1 0 125W R340 6633B 0757 0414 1 Res 432 190 0 125W R340 6634B 0757 0280 1 Res 1K 190 0 125W R341 66332A 6632B 0698 3441 1 Res 215 Ohm 1 R341 6633B 0757 0414 1 Res 432 190 0 125W R341 6634B 0757 0280 1 Res 1K 190 0 125W R342 66332A 6632B 0698 4509 1 Res 80 6K 1 R342 6633B 0698 3456 1 Res 287K 196 0 125W R342 6634B 0698 3260 1 Res 464K 196 0 125W R343 66332A 6632B 0698 3441 1 Res 215 Ohm 1 R343 6633B 0757 0414 1 Res 432 190 0 125W R343 6634B 0757 0280 1 Res 1K 190 0 125W R344 All 0757 0442 1 Res 10K 1 0 125W R345 All 0757 0280 1 Res 1K 190 0 125W R346 0757 0442 1 Res 10K 1 0 125W R347 All 0757 0458 1
41. 3 1901 1130 1901 1098 1901 0731 1901 0050 1901 0719 1901 1080 1901 1098 1901 1080 1901 1098 1901 1098 1901 0050 1901 0033 1901 0050 1901 0033 1901 0050 1901 0033 1901 0987 1902 0953 1901 0880 1901 0719 1902 0960 1901 0987 2110 0712 2110 0697 2110 0685 2110 0697 2110 0685 2110 0699 2110 0777 0811 3776 2110 1107 Not Used Not Used 1252 0063 1251 6832 1252 0063 1252 5977 0360 2609 1252 0056 1252 0063 1252 3771 9140 0115 Oty N N ale N alel a a 9 Replaceable Parts 5 Description Diode Rectifier Assembly ref D311 Heat Sink ref D311 Power Diode Diode Diode Diode Diode Power Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Power Diode See CR342 Zener Diode 6 2V 5 Diode Diode Power Zener Diode 12V 5 Power Diode 0314 Fuse Submin 4AM 125V Fuse Submin 15AM 32V Fuse Submin 7AM 125V Fuse Submin 15AM 32V Fuse Submin 7AM 125V Fuse Submin 5AM 125V Fuse 8AM 32V Res Fusible 0 5 Ohm 5W ref F305 Fuseholder Clips Replaced by track on all models Replaced by track on all models Connector Connector Connector Connector Barrier Block Connector Connector AC Line Module Coil 22 uH 10 61 5 Replaceable Parts Designator Model Part Number Qty Description 0300 5060
42. 32B 0160 4830 2 Cap 2200 pF 1090 C333 66332A 6632B 0160 5644 1 Cap 0 033 uF 10 C334 66332A 6632B 0160 5422 1 Cap 0 047 uF 20 C334 6633B 6634B 0160 4835 1 Cap 0 1 uF 1090 50V C335 66332A 6632B 0160 7001 1 Cap 3300 pF 100V 335 6633B 0160 5410 1 Cap 3300 pF 335 6634B 0160 4834 1 Cap 0 047 uF 10 C336 All 0160 4812 1 Cap 220 pF 5 C337 339 0160 5422 3 Cap 0 047 uF 20 C340 6634B 0160 6836 1 Cap 0 01 uF 250V C341 343 All 0160 5422 3 Cap 0 047 uF 20 C344 66332A 6632B 0160 5422 1 Cap 0 047 uF 20 C344 6633B 6634B 0160 4833 1 Cap 0 022 uF 345 Not loaded C346 66332A 6632B 0160 5422 1 Cap 0 047 uF 20 C346 6633B 6634B 0160 4833 1 Cap 0 022 uF C347 All 0160 6827 1 Cap 0 022 uF 400V C348 0160 5422 1 Cap 0 047 uF 20 58 Replaceable Parts 5 Designator Model Part Number Qty Description C349 66332A 6632B 0160 4791 1 Cap 10 pF 596 100V C349 6633B 6634B 0160 4807 1 Cap 0 033 uF C350 0160 5422 1 Cap 0 047 uF 20 351 0160 4791 1 Cap 10 pF 5 100V C352 66332A 6632B 0160 4791 1 Cap 10 pF 5 100V C352 6633B 6634B 0160 4807 1 Cap 0 033 uF C353 354 0160 5422 2 Cap 0 047 uF 20 355 66332A 6632B 0160 5422 1 Cap 0 047 uF 20 355 6633 6634 0160 4835 1 0 1 uF 10 50V 356 Not loaded 357 0160 4801 1 100 5 C358 All 0160 4791 1 Cap 10 pF 596 100V C359 66332A 6632B 0160 4791 1 Cap 10 pF 5 100V C359 6633B 6634B 0160 4787 1 Cap 22 pF 596 100V C360 66332A 6632B 0160 4791
43. 4 Verification and Performance Tests 2 e Open the load and again record the DVM voltage reading The difference between the DVM readings in steps d and e is the load effect voltage and should not exceed the value listed in the performance test record chart for the appropriate model under CV LOAD EFFECT CV Source Effect This test measures the change in output voltage that results from a change in ac line voltage from the minimum to maximum value within the line voltage specifications a Turn off the supply and connect the ac power line through a variable voltage transformer b Connect the output as shown in Figure 2 1a with the DVM connected between the 5 and the S terminals Set the transformer to nominal line voltage c Turn on the supply and program the current to the maximum programmable value and the output voltage to the full scale value d Adjust the load for the full scale current value as indicated on the front panel display The CV annunciator on the front panel must be on If it is not adjust the load so that the output current drops slightly Adjustthe transformer to the lowest rated line voltage e g 104 Vac for a 115 Vac nominal line voltage input f Record the output voltage reading on the DVM g Adjust the transformer to the highest rated line voltage e g 127 for 115 Vac nominal line voltage input h Record the output voltage reading on the DVM The difference between the DVM reading is
44. 442 1 Res 10K 1 0 125W R389 66332A 6632B 0811 1672 1 Res 3 3 Ohm 596 2W R389 6633B 0811 2553 1 Res 7 5 Ohm 5 2W PW R390 391 0698 8834 2 Res 9K 0 1 0 125W R392 66332A 6632B 0698 6320 1 Res 5K 0 1 R392 6633B 6634B 0698 6348 1 Res 3K 0 1 0 125W R393 66332A 6632B 6633B 0698 6360 1 Res 10K 0 1 R393 6634B 0698 8865 1 Res 4 45K 0 1 0 1W R394 66332A 6632B 0698 6358 1 Res 100K 0 1 R394 6633B 0698 6376 1 Res 200K 0 1 0 1W R394 6634B 0698 7841 1 Res 164K 0 1 0 1W R395 396 All 0699 1866 2 Res 2 7K 0 1 R397 6634B 0698 3642 1 Res 3K 2W R398 0757 0442 1 Res 10K 1 0 125W R399 All 0698 6533 1 Res 12 5K 0 1 R400 401 All 0757 0442 2 Res 10K 1 0 125W R402 0757 0438 1 Res 5 11K 1 R403 All 0699 4484 1 Res 72 Ohm R404 66332A 6632B 0757 0442 1 Res 10K 1 0 125W R405 All 0698 8827 1 Res 1M 1 0 125W R406 All 0698 3456 1 Res 287K 1 R407 66332A 6632B 0811 1672 1 Res 3 3 Ohm 5 2W R407 6633B 0811 2553 1 Res 7 5 Ohm 5 2W PW R408 66332A 6632B 0811 1672 1 Res 3 3 Ohm 5 2W R408 6633B 6634B 0811 2553 1 Res 7 5 Ohm 5 2W PW R409 66332A 6632B 0811 1672 1 Res 3 3 Ohm 5 2W R409 6633B 6634B 0811 2553 1 Res 7 5 Ohm 5 2W PW R410 66332A 6632B 0811 1672 1 Res 3 3 Ohm 5 2W R410 6633B 0811 2553 1 Res 7 5 5 2W PW R411 66332A 6632B 6633B 8159 0005 1 Jumper R412 66332A 6632B 6633B 0698 3454 1 Res 215K 1 R412 6634B 0698 3459 1 Res 383K 1 R413 66332A 6632B 0757 0442 1 Res 10K 1 0 125W R414 All 0699 0088 1 Res 1 2M 1 R415 66332A 6632B
45. 5 0698 6317 0811 1672 0811 2553 0698 4486 0699 1513 0699 3416 0699 3448 0699 1513 0699 3416 0699 3448 0757 0438 0811 0929 0812 0019 0811 1220 0698 6631 0698 8863 0699 0489 0698 4123 8159 0005 8159 0005 0698 8812 8159 0005 0757 0280 0698 0084 0757 0438 0698 6360 8159 0005 Oty e e e 2 Replaceable Parts 5 Description Res 3 3 Ohm 5 2W Res 7 5 Ohm 5 2W PW Res 133K 0 190 Res 10K 0 05 Res 15K 0 05 0 1W Res 402 1 Res 10K 196 0 125W Jumper Res 3K Res 10K 0 05 Res 15K 0 05 0 1W Res 52 3K 1 Res 5 1 1 Res 1K 1 0 125W Res 2 15K 1 Res 5 11K 1 Res 139 Ohm 1 0 125W Jumper Jumper Res 3 3 Ohm 5 2W Jumper Res 500 Ohm 0 1 Res 3 3 Ohm 5 2W Res 7 5 5 2W PW Res 24 9K 1 Res 40K 0 05 Res 100K 0 0596 0 1W Res 300K 0 05 0 1W Res 40K 0 05 Res 100K 0 0596 0 1W Res 300K 0 05 0 1W Res 5 11K 1 Res 0 51 Ohm 5 2W Res 0 33 596 2W PW Res 1 5 5 2W PW Res 2 5K 0 196 Res 5 2K 0 1 Res 16 1K 0 190 Res 499 Ohm 1 0 125W Jumper Jumper Res 1 Ohm 196 0 125W Jumper Res IK 1 0 125W Res 2 15K 1 Res 5 11K 1 Res 10K 0 196 Jumper 67 5 Replaceable Parts Designator Model Part Number Qty Description R455 66332A 6632B 0698 6631 1 Res 2 5K 0 1 R455 6633B 0698 8863 1 Res 5 2K 0 1 R455 6634B 0699 0489 1 Res 16 1K 0 1 R456 8159 0005 1 Jumper R457 66332A 6632B 8159 0005 1 Jumper R458 8159 0005 1 Jumper
46. 56 1 Transistor PNP 0311 6633B 6634B 1853 0772 1 Transistor PNP 0312 66332A 6632B 1854 1174 1 Transistor NPN 0313 06612 60006 1 FET Assembly 1855 0831 1 ref 0313 MOSFET N Chan 1205 0350 1 ref 0313 Heat Sink 0314 06612 60005 1 FET Diode Assembly 0590 0199 1 ref 0314 Hex Nut w Lockwasher 1855 0726 1 ref 0314 MOSFET P Chan 1205 0350 1 ref 0314 Heat Sink All 0340 0950 1 ref 0314 Insulator 2200 0143 1 ref 0314 Mach Screw 4 40 1901 0987 1 ref Q314 Diode 0499 62 Designator 0315 0315 0316 0317 0317 0318 0319 R300 R300 R301 R301 R301 R302 R302 R302 R303 R304 R305 R306 R307 309 R310 R311 R312 R313 R313 R314 R315 R316 R317 318 R319 R319 R319 R320 R320 R320 R321 R321 R321 R322 R323 R323 R323 R324 R324 R325 R325 R325 Model 66332A 6632B 6633B 6634B 66332A 6632B 6633B 6634B 66332A 6632B 66332A 6632B 6633B 6634B 66332A 6632B 6633B 6634B 66332A 6632B 6633B 6634B 66332 6632 6633B 6634B 66332 6632 6633 6634 66332 6632 6633 6634 66332 6632 6633 6634 66332 6632 6633 6634 66332 6632 6633B 6634B 66332A 6632B 6633B 6634B Part Number 1854 1174 1854 1362 1855 1016 1853 0656 1853 0772 1858 0074 1853 0656 0698 3642 0764 0046 0757 0403 0757 0416 0757 0283 0757 0403 0757 0416 0757 0283
47. 642A 6653 Digital Voltmeter Resolution IOnV 1V Keysight 3458A or eguivalent Readout 8 1 2 digits Accuracy 20 ppm Electronic Load 20 V 5 A minimum with transient capability Keysight 6060B or eguivalent GPIB Controller HP Series 300 or other controller with full GPIB capabilities 2 Verification and Performance Tests Resistor 1ohm 50 W Ohmite L50J1R0 substitute for electronic ohm 100 W Keysight 66332A 6632B Ohmite RLS5RO adjustable load if load is too noisy 24 ohm 100 W Keysight 6633B Ohmite RLS25R adjustable for CC PARD test 99 ohm 100 W Keysight 6634B Ohmite RLS100 adjustable 1k ohm 596 3W all models Keysight 0813 0001 Oscilloscope Sensitivity I mV Keysight 54504A or equivalent Bandwidth Limit 20 MHz Probe 1 1 with RF tip RMS Voltmeter True RMS Keysight 3400B or equivalent Bandwidth 20 MHz Sensitivity 100 uV Variable Voltage Adjustable to highest rated input voltage range Transformer Power 500 VA Measurement Techniques Test Setup Most tests are performed at the rear terminals of the supply as shown in Figure 2 1a Measure the dc voltage directly at the 5 and S terminals e
48. 7 159 0005 Oty hh o bb ne pop A A 2 Replaceable Parts 5 Description Res 13 3K 1 Res 3 32K 0 125W Res 200 Ohm 1 0 125W Res 3 3 Ohm 5 2W Replaced by wire in 6633B 6634B units Thermistor Switch Right Angle Slide Current Transformer Jumper 15V Regulator Assembly ref U300 Integrated Circuit ref U300 Heat Sink 5V Regulator Assembly Interface Bias ref 0301 Integrated Circuit ref 0301 Heat Sink 5V Regulator Assembly Secondary Bias ref 0302 Heat Sink ref 0302 Integrated Circuit Integrated Circuit 15 Regulator Assembly ref 0304 Integrated Circuit ref 0304 Heat Sink Integrated Circuit Integrated Circuit Integrated Circuit Integrated Circuit Integrated Circuit Integrated Circuit Integrated Circuit Integrated Circuit Integrated Circuit Integrated Circuit Integrated Circuit Zener Diode 9 1V 5 Zener Diode 4 99V 5 Zener Diode 6 2V 5 Zener Diode 10V 5 Zener Diode 2 4V 5 Zener Diode 3 6V 5 Zener Diode 2 4V 5 Zener Diode 3 6V 5 Zener Diode 6 2V 5 Zener Diode 9 1V 5 Jumper 69 5 Replaceable Parts A2 Interface PCA Tested for 66332A 5063 3439 No user replaceable parts A2 Interface PCA Tested for 6632B 6633B 6634B 5063 3429 No user replaceable parts A3 Front Panel PCA Tested for all models 5063 3432 No user replaceable parts Designator A4
49. 8 d hi on a ca deem T sm ra A 2 sternjt afr d 4 2 1 H 1329 8 I9 we indi 0168 5422 e i f n 2 U308 C IPS CLAMP N d 0160 6806 148908 1252 0856 oid SAZOSCATINAAH VEO SET S300 A 3808 288 2801 26 60 4040 st 8168 5847 8757 0407 8 2159 0095 35 NORMAL SI 1 2 os Ratt 148908 541 TU 3 ES E FAST a 2008 208 2001 Lon Kei ies Visi hei Vasa Vaso Via 1855 076 1855 0831 Yi 8159 0005 61 2921 4329 8 ra i 7 25 pa 148588 Eeo Te NO LOAD NO LOAD ITI UM na 0362 0807 1 2 Rage Vass V Taf 358566 1 3320 9 499 1901 8987 1981 8987 0336 reus 8 ae 9698 8812 pane 449 m 142 SO53HD1RGBGF s 4780p 4 NO LOAD pua m MM B NETO 09 4358 E 590213465 5405 Di 1115 0057 7115 8957 BE oaz E R456 0UT 1 8 5 3 2 2 1 2 5 aan ws Gs SS 2 OHNS 17 ZOPPN de SO20CKORORGSB2MZ OUT P SG20CXGROBOSB2MZ 726505580088 148737 3 ease 8699 4484 ES 0157 0282 0465 sm AS 8168 4897 d 2209 1 2 8168 3454 8698 6360 SENSE 309 4 1115 0857 8360 2338 8598 8984 CROWBAR CONTROL ME eae A 9160 5422 7 1858 0014 Rats 1858 0054 2388 5 8168 7271 R494 756 R433 R439 8368 2338 580 7205055900
50. 99 0236 0699 1867 0757 0401 0757 0458 0699 0934 0699 2246 0698 8807 0699 1513 0698 3634 0698 3642 0757 0436 0757 0401 0698 8959 0757 0401 0698 3460 0811 1672 0811 2553 0699 0236 0699 1867 Oty m m om e e Rey nm m dA Replaceable Parts 5 Description Res 5K 0 1 Res 6 2K 1 Res 5K 190 Jumper Res 619K 190 Res 16 2K 190 Res 51 1 1 Res 80 6 1 Res 2 15 1 Res 200K 1 Res 249K 1 Res 200K 1 Res 25K 0 05 Res 22 22 0 05 Not loaded Jumper Res 25K 0 05 Res 39K 0 1 Res 40 0 05 221 1 Res 25 0 05 Res 22 22 0 05 Res 22K 0 1 0 125W Res 4 32K 1 Res 10K 190 0 125W Res 35 65K 0 190 Res 25K 0 05 Res 2 5K 0 1 0 1W Res 3 2K 0 1 0 1W Res 100 Ohm 1 0 125W Res 51 1 1 Not loaded Res 35 65K 0 1 Res 25K 0 05 Res 39K 0 1 Res 40K 0 05 Res 470 Ohm 5 2W Res 3K 5 2W MO Res 4 32K 1 Res 100 Ohm 1 0 125W Res 619K 1 0 125W Res 100 Ohm 1 0 125W Res 422K 1 Res 3 3 Ohm 5 2W Res 7 5 Ohm 5 2W PW Res 2 5K 0 1 0 1W Res 3 2K 1 0 125W 65 5 Replaceable Parts Designator Model Part Number Qty Description R386 66332A 6632B 0811 1672 1 Res 3 3 Ohm 596 2W R386 6633B 6634B 0811 2553 1 Res 7 5 Ohm 5 2W PW R387 66332A 6632B 0811 1672 1 Res 3 3 Ohm 596 2W R387 6633B 6634B 0811 2553 1 Res 7 5 Ohm 5 2W PW R388 All 0757 0
51. A1 to A2 J206 Cable A1 to A2 J207 Cable A2 7210 to J610 Cable A2 J211 to A3J111 Cable A1 J314 to A4 J615 Line Cord Standard Option 903 Line Cord Option 900 Line Cord Option 901 Line Cord Option 902 Line Cord Option 904 Line Cord Option 906 Line Cord Option 912 Line Cord Option 917 Line Cord Option 918 55 5 Replaceable Parts Designator MP2 MP2 MP3 MP4 MP5 MP6 MP6 MP6 MP6 MP7 8 MP9 MP10 MP12 MP13 MP14 MP15 MP16 MP17 MP18 MP19 MP20 MP21 MP22 MP23 MP24 MP25 MP26 27 28 29 MP30 MP31 MP32 MP33 MP34 MP35 MP36 MP37 MP38 MP39 MP40 MP41 42 56 Model All All All All All All 66332A 6632B 6633B 6634B All All All All All Table 5 2 Chassis Mechanical Part Number 06612 00002 5063 3426 5063 3443 0370 3238 06612 40001 1510 0091 66332 80001 06632 80019 06633 80002 06634 80002 5001 9847 5041 8819 5041 8820 5062 3702 06624 20007 1252 1488 06611 40006 5020 2859 06612 20002 0515 0433 1400 1826 06612 20001 06612 80004 5041 8801 0515 1117 0515 1132 06612 00005 06612 00004 2950 0144 0590 0305 5001 0538 0380 0644 2190 0034 3050 0849 5001 6788 5001 6787 1400 1281 0515 0380 0515 1946 0515 2535 0515 0374
52. F gt 8168 5519 0160 4807 8168 4835 0698 6369 0698 6533 1 MEAR 3 tia eine 8757 0280 0683 0415 435006 257 58238 t 5023RE4K7508 NES 435 R 28X J 4RT Hen pon 369 365 a m Tre 72350 0 0224 1982 0957 0160 6827 jw 8160 5471 m e 1961 1128 301 1902 3092 G G160 6827 22NF1 107488V A CO 35620 E NORM 8751 0401 0316 5380 0 0 8 c Siro as 8159 9005 C erans I y ae NO LOAD LOAD 2158 22 gym a supos 0319 R359 8 841u 50 8 08159 9005 NO LOAD 0169 5422 A 016 6800 m NO LOAD REZA MR i 486 1901 1098 3159 0095 55 1902 8197 8 Ce 14150 laco 1902 0947 8159 9005 FAST 8159 0005 E FEN FEN Ferd SG43EDSK11F wear 9751 0280 NO 8811 1512 8811 1672 811 1672 y 8811 1872 8 NSS 435000 m 0598 4509 POR 2408 0811 1672 Raga ES 0328 0321 3 NO LOAD 0318 a 33 at gas 1 1 ves sinere Im E 2497 8811 1672 9698 5351 Rae 31 8153 0095 2485 1991 1128 33 33 8160 4803 E ser gt ga E 5 62k 1826 0643 0811 1672 981 1672 SAIO1AZ71JAAH 1901 0050 1901 0050 E FEM 1853 0086 8698 3152 n 1825 1878 BAVIO SELECTED BAVIO SELECTED e pd 571468 gam n ADTI2UN 8159 0905 313 V NO LOAD NO LOAD 08 a NO LOAD 0320 a 8337 0683 0475 76328 0151 0442 a Y 1901 1098 93159 0005
53. HNOLOGIES 66332A 0 A 00 01 The revision level of the ROM can also be found on the label affixed to the physical IC chip itself Upgrade Procedure If the Interface board ROM is upgraded you can re initialize the supply without affecting the calibration a Enable the Calibration mode b Simultaneously depress the 0 and 9 keys EEINIT model will be displayed c Using the Up Down annunciator keys select ROMUPD model d Using the Up Down arrows select the appropriate model number Press Enter The supply will go through the turn on self test sequence and return to the power supply metering mode 42 Troubleshooting 3 Disassembly Procedures The following paragraphs provide instructions on how to disassemble various components the dc power supply Once disassembled the components can be reassembled by performing the disassembly instructions in reverse order Figure 3 2 shows the location of the major components of the unit AG Reiay Board 1 Control Board Input Filter Board ES A2 Interface Board m d T1 Main Transformer 20200 a i 7 ES CHOED EI ED 7 CECI EI CA O 6 4 Bindirg Post Board Front Panel Display Board Figure 3 2 Component Location WARNING SHOCK HAZARD To avoid the possibility of personal injury turn of
54. Iout 2 3 mA 128 8 Isink 2 9 mA 128 8 uA 2 5 HA 0 1 Iout 22 5 1 7 pA Iout 22 5 1 7 250 025 mA Troubleshooting Introduction WARNING SHOCK HAZARD Most of the troubleshooting procedures given in this chapter performed with power applied and protective covers removed Such maintenance should be performed only by service trained personnel who are aware of the hazards for example fire and electrical shock CAUTION This instrument uses components which can either be damaged or suffer serious performance degradation as a result of ESD electrostatic discharge Observe the standard antistatic precautions to avoid damage to the components An ESD summary is given in Chapter 1 This chapter provides troubleshooting and repair information for the dc power supply Before attempting to troubleshoot the dc power supply first check that the problem is with the supply itself and not with an associated circuit The verification tests in Chapter 2 enable you to isolate a problem to the dc power supply Troubleshooting procedures are provided to isolate a problem to one of the circuit boards or a particular circuit Figure 3 2 shows the location of the circuit boards and other major components of the unit If a problem has been isolated to the Al Control circuit board additional troubleshooting procedures are available to isolate the problem to the defective component s Disassembly procedures are provi
55. Keysight Model 66332 Dynamic Measurement source and Keysight Models 66328 66338 6634 oystem DC Power Supply Service Manual KEYSIGHT TECHNOLOGIES NOTICE This document contains references to Agilent Technologies Agilent s former Test and Measurement business has become Keysight Technologies For more information go www keysight com KEYSIGHT TECHNOLOGIES Warranty Information CERTIFICATION Keysight Technologies certifies that this product met its published specifications at time of shipment from the factory Keysight 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 Keysight Technologies hardware product is warranted against defects in material and workmanship for a period of three years from date of delivery Keysight Technologies software and firmware products which are designated by Keysight Technologies for use with a hardware product and when properly installed on that hardware product are warranted not to fail to execute their programming instructions due to defects in material and workmanship for a period of 90 days from date of delivery During the warranty period Keysight Technologies will at its option either repair or replace products which p
56. NOLOGIES 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 KEYSIGHT TECHNOLOGIES SHALL NOT BE LlABLE FOR ANY DIRECT INDIRECT SPECIAL INCIDENTAL OR CONSEGUENTIAL 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 Keysight Technologies Sales and Service office for further information on Keysight Technologies full line of Support Programs Safety Summary The following general safety precautions must be observed during all phases of operation of this instrument Failure to comply with these precautions or with specific warnings elsewhere in this manual violates safety standards of design manufacture and intended use of the instrument Keysight Technologies assumes no liability for the customer s failure to comply with these reguirements WARNING Servicing instructions are for use by service trained personnel To avoid dangerous electrical shock do not perform any servicing unless you are gualified to do so Some procedures described in this manual are performed with power supplied to the instrument while its protective covers are removed If contac
57. OUT Negative DC voltage or return terminals sense OUT sensing terminal sense OUT sensing terminal common connected to ground conductor INH FLT connector FLT INH mode Digital VO mode FLT output OUT O FLT Common OUT 1 INH Input IN 2 OUT 2 INH Common Common as shipped configuration RS 232 connector XON XOFF uses ASCII control codes DC and DC1 RTS CTS uses Reguest To Send and Clear To Send lines DTR DSR uses Data Terminal Ready and Data Set Ready lines NONE there is no flow control GPIB connector GPIB IEEE 488 Provides the interface to an external GPIB controller Can be 100 Vac 120 Vac 220 Vac or 240 Vac Input 47 4 Principles of Operation A3 Front Panel Circuits As shown in Figure 4 1 the supply s front panel assembly contains a circuit board a keypad a liguid crystal display LCD and a rotary control RPG for the output voltage and current With the exception of the RPG A3G1 the A3 Front Panel board is an assembly level replaceable part A separate front panel binding post board is also included on the unit It is also available as an assembly level replaceable part The A3 front panel board contains microprocessor circuits which decode and execute all keypad and RPG commands that are transferred to the power supply output via the serial I O port to the primary interface circuits on the A2 interface board The front panel microprocessor circuits also process power supply measurement and status data received
58. R459 66332A 6632B 8159 0005 1 Jumper R460 All 0698 6620 1 Res 150 0 1 R461 0757 0395 1 Res 56 2 Ohm 1 R462 66332A 6632B 6633B 0757 0416 1 Res 511 Ohm 1 0 125W R462 6634B 0757 0394 1 Res 51 1 Ohm 1 0 125W R463 6634B 0698 3642 1 Res 3K 2W R464 465 0698 0084 2 Res 2 15 1 R466 66332A 6632B 0698 8812 1 Res 1 Ohm 196 0 125W R466 6633B 0683 0475 1 Res 4 7 Ohm R466 6634B 0757 0379 1 Res 12 1 Ohm R467 468 66332A 6632B 0811 1672 2 Res 3 3 Ohm 596 2W R469 66332A 6632B 0811 1672 1 Res 3 3 Ohm 596 2W R469 6633B 0811 2553 1 Res 7 5 Ohm 596 2W PW R470 66332A 6632B 0811 1672 1 Res 3 3 Ohm 596 2W R470 6633B 6634B 0811 2553 1 Res 7 5 Ohm 596 2W PW R471 66332A 6632B 0699 1797 1 Res 10M 5 0 25W R471 6633B 6634B 0683 1065 1 Res 10M R472 0757 0442 1 Res 10K 1 0 125W R473 66332A 6632B 0811 3770 1 Res 0 05 Ohm 1 R473 6633B 0811 3771 1 Res 0 25 Ohm 1 R473 6634B 0811 3772 1 Res 0 5 Ohm 196 R474 All 8159 0005 1 Jumper R476 All 0757 0281 1 Res 2 74K 1 R477 All 0757 0199 1 Res 21 5K 1 R478 479 0698 4444 2 Res 4 87K 1 R480 481 All 0757 0269 2 Res 270 Ohm 1 0 125W R482 0698 3226 1 Res 6 49 1 R483 0698 5089 1 Res 33K 1 0 125W R488 66332A 6632B 0698 3922 1 Res 487K 0 1 R488 6633B 0699 1744 1 Res 280K 0 1 R488 6634B 0699 0070 1 Res 3 16M 1 R489 66332A 6632B 0698 3922 1 Res 487 0 1 R489 6633B 0698 6950 1 Res 1 25M 0 1 0 5W R489 6634B 0699 0070 1 Res 3 16M 1 R490 66332A 6632B 0699 0730 1 Res 1
59. TEN BAVIA SELECTED Wm NW Vase gt l j TURN ON CONTROL 51 1K i E cae 0160 6827 22NF 107400V y Ab 9160 5422 ynys 9163 5422 746 d 25 1K SA2O5C4TSMAAH 1 2 CURRENT CONTROL CKT gs em mm a R356 9757 8288 LP365N R383 gast nng 0336 C29 619K 5 8751 041 1 p gt _ 5 saren 9598 6329 m 228p MWM gt v 0305 0 49 9160 4812 je 9598 8959 p SAIO1A2Z1JAAH cos 98 542 T mopom a E y fe qua 222 36 2 825 QE bz 1 ik gt HS wet rekon 8751 8442 1858 8954 Aa is see 0160 4441 1858 8854 SG53HDB25K0F 4 NUTUS 5 ei 1858 0054 8751 8279 R362 a R322 1 a 0160 5098 8698 3156 363 1 2 ar 449622 4KSRSCA 0498 8757 0288 9 108 18 2K 8688 54526 8698 6292 1 2 1 8160 4801 9151 0447 340K 3 0757 8436 o afe 0 NES 9168 4835 Ge oV oV 1 4 0168 5422 ws qm Tac 8 0309 0311 0315 0319 m 0698 5 0315 0751 0442 48 m 0305 c ms U305 A 10k vesss 5 1K 1 te 1 2 EO cun i a 1 28 16 1901 0050 0757 0442 166 291 wy TE 0157 0438 4 1826 0346 NAH HEATSINK INO gt 13557 7 AN MEL 8151 0442
60. Up Down annunciator keys select FAN MODE lt AUTO gt Using the Up Down arrows select FAN MODE lt MAN gt e o Press Enter Simultaneously depress the 0 and 9 keys EEINIT lt model gt will be displayed Using the Up Down annunciator keys select FAN SPEED lt data gt Press Enter Number 0 rm Enter the desired speed numeric entry range is 0 to 100 1 Press Enter Disabling Protection Features Except for overvoltage protection the power supply s protection features may be disabled This is not recommended as a normal operating condition but is helpful under some circumstances such as troubleshooting The turn on default 15 NO PROTECT OFF protection enabled so this procedure must be performed as needed every time the line voltage is turned on To disable the protection a Simultaneously depress the 0 and 9 keys EEINIT model will be displayed b Using the Up Down annunciator keys select NO PROTECT OFF c Using the Up Down arrows select NO PROTECT d Press Enter 40 Troubleshooting 3 Post repair Calibration Calibration is reguired annually and whenever certain components are replaced If components in any of the circuits listed below are replaced the supply must be re calibrated as described in Appendix B of the User s Guide a Al Control Board Voltage or Current Monitor Amplifier circuits High Bandwidth Current Amplifier or Current Monitor resistors R4
61. Voltage sheet 12 Output V gt programmed value Check FUSE signal U305B 7 approx 2 8V with 20V output Troubleshoot Fuse divider and amplifier circuit R393 394 U305 Yes Problem may be defective A2 or one of the voltages to A2 Vmon Imon_H Imon_L Imon_P gt its bias voltage 5Vs Figure 3 1 Sheet 6 FS Indicated but Fuse OK 30 Program full scale voltage and current and enable output Measure output voltage with an external voltmeter Display zero V but output OK No CV or CC Annunciator on No G305A base 11 4V Go to sheet 8 Yes Troubleshooting 3 Check W7 Vmon and A2 Interface board Check for short across output such as output cap C382 CR342 etc Displays current egual to prog value Yes Yes No Go To sheet 9 No Check W7 A2 gt NO Interface Board CC_Prog R360 4 7V PM Inhibit R335 Jos Low IMon H U309A 6 0V Check Positive Current Ye Control Circuit 03108 Yes Troubleshoot Turn On Control Circuit C D and U305A No y Check High Range Current Monitor Amp U309A Check W7 A2 Interface Board Figure 3 1 Sheet 7 No Output Voltage 31 3 Troubleshooting Continued from sheet 7
62. When the current reguired to reduce the voltage is less than the programmed current value the CV control circuit is active and regulates the output voltage When the current reguired to reduce the voltage exceeds the programmed current value the CCN control circuit is active It regulates the output current by comparing the negative Imon_H signal to the inverted CC_Prog signal During operation a PM_Inhibit signal will cause the turn on control to turn off the bias to the voltage gain stage and shut down the output if any of the following occur 52 Principles of Operation 4 The output is programmed off An overvoltage condition is detected OV_Detect signal is received The line voltage falls below 90 volts approximately Current readback is provided by three separate circuits The previously discussed high range current signal Imon_H returns the high range current measurement When the unit is operating in the low current readback mode a separate low range current shunt and amplifier provides low current readback via the Imon_L signal The Range_Select signal drives shunt clamps O304 and O305 which clamp the voltage across RmLo to approximately 1 8 V A third current readback circuit is available on the Keysight 66332A unit It consists of a high bandwidth current amplifier that returns dynamic current measurements from the output filter capacitor via the Imon_P signal Note that the Imon_H and the Imon_P signal are combined to retur
63. acket d Remove four Torx T15 screws that secure the main control board to the chassis e Slide the main board towards the front panel to release it from chassis mounted standoffs and then lift the board out of the chassis T1 Power Transformer Removal and Replacement To remove the power transformer the front panel assembly must first be removed to gain access to the bracket screws that hold the transformer in place a Remove the three Torx T10 screws securing the rear of the transformer bracket to the bottom of the chassis and the two Torx T10 screws securing the front of the transformer to the chassis b Use long nose pliers to disconnect all wires going to the transformer terminals c Lift the transformer out of the chassis NOTE The AC power connections at the transformer primary are line voltage dependent Refer to Figure 3 3 subsequent reconnection 45 3 Troubleshooting Line Voltage Wiring Figure 3 3 illustrates the primary wiring configuration of the power transformer for various ac line voltages Use long nose pliers to disconnect the wires going to the transformer terminals NOTE Install the correct fuse when changing the ac line voltage from a previous setting for 110 120 Vac 4 AM Keysight p n 2110 0055 for 220 230 Vac 2 AM Keysight p n 2110 0002 grey grey white red grey white red grey jumper Front of unit Front of unit Side of 4 d Side of SL lt gt transformer
64. age 36 Troubleshooting 3 Specific Troubleshooting Procedures Power on Self test Failures The power on self test seguence tests most of the digital and 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 3 2 lists the self test errors and gives the probable cause for each error NOTE A partial self test is performed when the TST query is executed Those tests that interfere with normal interface operation or cause the output to change are not performed by TST The return value of TST will be zero if all tests pass or the error code of the first test that failed The power supply will continue normal operation if TST returns non zero value Table 3 2 Self Test Error Codes Messages E3 CheksuminCalNonvolaile ROM AZImefweBd E4 Checksum in State Non volatileROM A2ImefaceBd ES Checksum in RST Non volatile ROM AD Interface Bd E11 12 bit DAC test failed 0 is written to DAC U241A and B A2 Interface Bd ADC U242 is checked for 133 7 counts E12 12 bit DAC test failed 4095 is written to DAC U241A A2 Interface Bd and 0 to B ADC U242 is checked for 71 7 counts E13 12 bit DAC test failed 0 is written to DAC U241A and A2 Interface Bd 4095 to B ADC U242 is checked
65. age drop across the gating diodes A1 D328 CV and D325 CC A conducting diode indicates an active ON control circuit This forward drop is applied to the input of the associated status comparator U306A and D respectively and drives the output DETECT CC DETECT low The low signal indicates an active status which is sent to the A2 board microprocessor The front panel CV annunciator indicates when the CV mode is active CV_DETECT is low The front panel CC annunciator indicates when the CC mode is active CC DETECT 15 low The UNREGULATED UNR annunciator comes on when neither the CV nor CC is active Bias and Rail Voltages Before troubleshooting any circuit check the bias and or rail voltages to make sure that they are not the cause Table 3 3 lists the bias and rail voltage test points for the A1 Main Control A2 Interface and the A3 Front Panel Display boards Unless otherwise noted all voltages are measured with respect to secondary common R473 3 with no load on the supply Table 3 3 Bias and Reference Voltages Test Point Common Measurement See Figure 6 1 Rail Keysight A1TP310 Output 38 10 800 6632 66332 Rail Keysight 6633B Al TP 310 73V 10 2 5 Rail Keysight 6634B Al TP 310 130V 10 2 2V P P Rail Keysight TP 311 Output 9 8V 10 400mV P P 6632B 66332B Rail Keysight 6633B Al TP 311 10 2V 10 300mV P P Measured with respect to Outp
66. chassis This dc power supply is a Safety Class I instrument which means it has a protective earth terminal This terminal must be connected to earth ground through a power source eguipped with a 3 wire ground receptacle Refer to the Safety Summary page at the beginning of this manual for general safety information Before operation or repair check the dc power supply and review this manual for safety warnings and instructions Safety warnings for specific procedures are located at appropriate places in the manual Related Documents The following documents are shipped with your dc power supply e User s Guide containing installation operating and calibration information a Programming Guide containing detailed GPIB programming information 1 Introduction Revisions Manual Revisions This manual was written for dc power supplies that have the same manufacturing dates the first four digits as those listed on the title page and whose unigue identification number the last four digits are egual to or higher than those listed in the title page NOTE If the first four digits of the serial number your unit are higher than those shown in 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 dc power supply those differences are documented in one or more Manual Change
67. configuration switch on A2 Interface board to bypass the password See Calibration Switch paragraph above 41 3 Troubleshooting Initialization The dc power supply s GPIB address and model number as well as other constants which are reguired to program and calibrate the supply are stored in a EEPROM on the A2 Interface board The Interface board also contains references and other components that will affect the alignment of the supply If the Interface board is replaced the supply must be reinitialized and calibrated To initialize the power supply a Enable the Calibration mode b Simultaneously depress the 0 and 9 keys c Using the Up Down arrows select the appropriate model number Press Enter The de power supply will go through the turn on self test sequence It is now re initialized and must be calibrated See Appendix A of the User s Guide for the calibration procedure ROM Upgrade Identifying the Firmware You can use the IDN query to identify the revision of the supply s firmware The query will readback the revisions of the Primary Interface ROM located on the A2 Interface board The manufacturer and model number of the supply are also returned The following is a sample program 10 ALLOCATE L 52 20 OUTPUT 705 IDN 30 ENTER 705 L 40 DISP LS 50 END The computer will display the manufacturer s name the model number a 0 and then the firmware revision Example KEYSIGHT TEC
68. ded at the end of this chapter and should be referred to as reguired in order to gain access to and or replace defective components If a component is defective replace it and then conduct the verification test given in Chapter 2 NOTE Note that when certain components are replaced the supply must be calibrated See Post Repair Calibration later in this chapter If the A2 Interface Board is replaced the supply must be initialized before it is calibrated See Initialization later in this chapter Chapter 5 lists all of the replaceable parts for the power supplies Chapter 6 contains schematics test point measurements and component location diagrams to aid you in troubleshooting the supply 23 3 Troubleshooting Test Eguipment Reguired Table 3 1 lists the test eguipment reguired to troubleshoot the power supply Recommended models are listed Table 3 1 Test Equipment Required for Troubleshooting Recommended Model GPIB Controller To communicate with the supply via the HP Series 300 GPIB interface Digital Voltmeter To check various voltage levels Keysight 3458A Oscilloscope To check waveforms and signal levels Keysight 54504A 54111A Electronic Load Keysigh 60608 IC Test Clips To access IC pins AP Products No LTC Ammeter Current To measure output current Guildline 9230 15 Shunt Overall Troubleshooting Overall troubleshooting procedures for the power supply are given in the Figure 3 1 The procedures first chec
69. er the housing Unplug the flat cables Note the position of the conductive side for reinstallation Connectors release the cable by pulling out end tabs as shown by the arrows in the following figure Lift the board off of the snap in standoffs To reinstall the Interface board perform the above steps in reverse order Front Panel Assembly Removal and Replacement This procedure removes the front panel assembly from the dc power supply a b 44 Remove the Power Supply Cover as described earlier Cover Removal Replacement Disconnect the cable between the Front Panel board and the Interface board at the Interface board Carefully peel off the vinyl trim strips on each side of the front panel that cover the front panel screws Using a Torx T10 driver remove the two screws one on each side that hold the front panel assembly to the chassis Slide the Front Panel assembly forward and away from the chassis to access the S1 power switch Disconnect the wires going to the S1 switch assembly For reassembly make a note of the color coding of the wires and the pins to which they are connected If the supply has front panel binding posts unplug the cable from the binding post connector and use a Torx T15 driver to remove the screw connecting the ground wire to the chassis You can now remove the front panel assembly from the supply To reinstall the Front Panel Assembly perform the above step
70. er between the S and the 5 terminals as shown in Figure 2 1a b Turn on the supply and program the supply to zero volts and the maximum programmable current with the load off c Record the output voltage readings on the digital voltmeter DVM and the front panel display The readings should be within the limits specified in the performance test record chart for the appropriate model under CV PROGRAMMING 6 0 VOLTS Also note that the CV annunciator is on The output current reading should be approximately zero d Program the output voltage to full scale e Record the output voltage readings on the DVM and the front panel display The readings should be within the limits specified in the performance test record chart for the appropriate model under CV PROGRAMMING FULL SCALE CV Load Effect This test measures the change in output voltage resulting from a change in output current from full load to no load a Turn off the supply and connect the output as shown in Figure 2 1a with the DVM connected between the 5 and S terminals b Turn on the supply and program the current to the maximum programmable value and the voltage to the full scale value Adjustthe load for the full scale current as indicated on the front panel display The CV annunciator on the front panel must be on If it is not adjust the load so that the output current drops slightly d Record the output voltage reading on the DVM connected to 5 and 5 1
71. er to read the average of the measurements as follows Press Shift key f1 Shift key N Press down arrow until RMATH function is selected then press gt Press up arrow until MEAN function is selected then press ENTER e Execute the program by pressing 10 ENTER TRIG ENTER f Wait for 100 readings and then read the average measurement by pressing f1 ENTER To repeat the measurement perform steps e and f CC Load Effect This test measures the change in output current for a change in load from full scale output voltage to short circuit a Turn off the supply and connect the output as shown in Figure 2 1a with the DVM connected across the current monitoring resistor b Turn on the supply and program the current to the full scale current value and the output voltage to the maximum programmable voltage value Adjustthe load in the CV mode for full scale voltage as indicated on the front panel display Check that the CC annunciator of the UUT is on If it is not adjust the load so that the output voltage drops slightly d Record the output current reading DVM reading current monitor resistance value in ohms You may want to use the average reading program described under CC Load and Line Regulation e Short the load switch and record the output current reading The difference in the current readings in steps d and e is the load effect and should not exceed the limit specified in the performance test record c
72. f 0 to 5V which corresponds to the zero to full scale readback capability of the de power supply The 8 channel 8 bit ADC returns the following signals to the logic array high range output current Imon H high range negative current H overvoltage V Mon ambient temperature Temp Amb heatsink temperature HS Therm and output fuse state Fuse Five of these signals are for fan control The logic array varies the Fan Prog signal depending upon the ambient temperature the heatsink temperature and the present output voltage and current The Fuse signal informs the logic array if the output fuse F300 is open A1 Main Board Circuits Power Circuits As shown in Figure 4 2 the power circuits consist of input power rectifiers and filter current monitoring resistors an output stage a voltage gain stage an overvoltage SCR and an output filter The ac input rectifier and filter converts ac input to a dc level The output stage regulates this dc level at the output of the power supply The output stage has up to four parallel NPN transistors mounted on a heatsink and connected between the Rail and the Output These transistors are driven to conduct by a positive going signal from driver 0303 located in the voltage gain stage The output stage also has up to four parallel PNP transistors mounted on a heatsink and connected between the Rail and the Rail These transistors are driven to conduct by a negative going signal
73. f 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 the list of reguired tools when performing disassembly and replacement List of Reguired Tools a 2PT Pozidriv screwdrivers b T10 and T15 Torx screwdrivers Hex drivers 7 mm for GPIB connector 3 16 for RS 232 connector 1 4 for front panel binding posts d Long nose pliers e Antistatic wrist discharge strap 43 3 Troubleshooting Cover Removal and Replacement a Using a 2TP Pozi screwdriver unscrew the two screws that hold the carrying straps to the power supply and then remove the two screws from the opposite side of the case To remove the cover first spread the bottom rear of the cover slightly and push from the front panel Slide the cover backward until it clears the rear of the power supply A2 Interface Board Removal and Replacement To remove the Interface Board proceed as follows a b f Remove the cover of the power supply as described under Cover Removal and Replacement Remove the two 7 mm and 3 16 inch hex screws that hold the GPIB and RS 232 connectors in place Unplug the cable from J206 Depress the release button located at the end of the connector where the wires ent
74. g i ova 8 Bold AO i pend 80 5 gt oee u a ova wa 4 zEz9u bold AD teng 1 1 1 1 1 H i 1 ddo 7 wn XNA ug l bold d von H Wwe i 1 1 1 1 1 1 Wd 509 AO gt 100190 AO 29999 NOD sed 00 AO Aquesey Od ure LY OL i i Sng SSoJppy nou esa sng ew d 0 ado 1 sng reyes 49 Figure 4 1 A2 A3 Block Diagram 4 Principles of Operation The EEPROM electrically erasable programmable read only memory chip on the A2 interface board stores a variety of data and configuration information This information includes calibration constants GPIB address present programming language and model dependent data such as the minimum and maximum values of voltage and current One of the EEPROM storage locations holds a checksum value which is used to verify the integrity of the EEPROM data Access to the calibration data in the EEPROM is controlled by the combination of a password and switch settings on 425201 located on A2 interface board See Chapter 3 Inhibit Calibration Sw
75. hart for the appropriate model under CC LOAD EFFECT CC Source Effect This test measures the change in output current that results when the AC line voltage changes from the minimum to the maximum value within the specifications a Turn off the supply and connect the ac power line through a variable voltage transformer b Connect the output terminals as shown in Figure 2 1a with the DVM connected across the current monitoring resistor Set the transformer to the nominal line voltage c Turn on the supply and program the current to the full scale value and the output voltage to the maximum programmable value d Adjustthe load in the CV mode for full scale voltage as indicated on the front panel display Check that the CC annunciator of the UUT is on If it is not adjust the load so that the output voltage drops slightly e Adjustthe transformer to the lowest rated line voltage f Record the output current reading DVM reading current monitoring resistor in ohms You may want to use the average reading program described under CC Load and Line Regulation g Adjust the transformer to the highest rated line voltage h Record the output current reading again The difference in the current readings in steps f and h is the CC source effect and should not exceed the values listed in the performance test record card under CC SOURCE EFFECT 18 Verification and Performance Tests 2 CC Noise PARD Periodic and random devia
76. he DMM to operate in current mode Turn on the external supply and program it to 20 V and 1 amp Then program the supply under test to zero volts and I amp The UUT display should read approximately 20 mA Record the current reading on the DMM and the reading on the front panel display The difference between the two readings should be within the limits specified in the performance test record chart under 20mA RANGE CURRENT READBACK ACCURACY 20 mA CC Load and Line Regulation These tests CC Load Effect and CC Source Effect given below are tests of the dc regulation of the power supply s output current To insure that the values read are not the instantaneous measurement of the ac peaks of the output current ripple several dc measurements should be made and the average of these readings calculated An example of how to do this is given below using a Keysight 3458A System Voltmeter programmed from the front panel Set up the voltmeter and execute the Average Reading program follows a b Program 10 power line cycles per sample by pressing NPLC 1 0 ENTER Program 100 samples per trigger by pressing N Rdgs Trig 1 00 ENTER 2 Verification and Performance Tests c Setup voltmeter to take measurements in the statistical mode as follows Press Shift key f0 Shift key Press up arrow until MATH function is selected then press gt Press up arrow until STAT function is selected then press ENTER d Setup voltmet
77. isable protection 40 disassembly tools 43 disassembly procedure 43 downprogramming 50 52 DP Control 50 EEPROM 50 electronic load 13 electrostatic discharge 10 error codes 37 F F309 50 fan speed 40 Fan Prog 50 52 firmware revisions 10 42 FLT 47 front panel removal 44 45 Fuse 50 G GPIB 47 hazardous voltages 9 history 5 HS_Therm 50 identification 5 IDN guery 42 Imon_H 50 52 1 50 P 50 INH 47 inhibit calibration 41 initialization 42 interface signals 47 81 Index J 4307 voltages 39 line voltage wiring 46 M manual revisions 10 N notice 5 Q0 OUT 47 out of range 41 OV Detect 48 52 OV Prog 50 OV SCR 48 52 P PARD 15 19 password 41 performance test form 19 performance tests 13 PM Inhibit 52 power on self test 37 primary interface 48 printing 5 programming 13 protection 40 R readback accuracy 14 reference voltages 38 39 replaceable parts binding posts 57 replaceable parts chassis 55 revisions 10 RmHi 52 RmLo 52 ROM upgrade 42 RPG 48 82 RS 232 47 MEC NA safety considerations 9 safety summary 3 schematic A1 77 78 79 A4 76 schematic notes 71 SCR 52 secondary interface 48 self test 37 sense 47 sense switch 52 serial number 5 series regulator 50 shunt clamp 52
78. itch The Dual 12 bit DAC converts the programmed value of voltage and current on the bus into the CV_Prog and CC_Prog signals which are sent to the CV control circuits in order to control the magnitude of the output voltage in the CV mode and output current in CC mode The CV_Prog and CC Prog signals are in the O to 5 V range which corresponds to the zero to full scale output ratings of the dc power supply The Quad 8 bit DAC converts programmed information for the following circuits into analog format negative offset trim OS Trim Neg overvoltage setting OV Prog current measurement range select Range Select and fan speed programming Fan Prog The OS Trim Neg signal allows the negative current control circuit to be calibrated at zero The OV Prog signal is applied to the OV detect circuit which compares the programmed overvoltage setting with the actual output voltage The Range Select signal selects either the high or the low 20mA measurement range The Fan Prog signal is applied to the fan speed control circuit in order to speed up the fan as temperature increases and to slow the fan speed down as temperature decreases The 16 bit ADC in conjunction with a 4x1 multiplexer returns data from the following measurement signals to the logic array monitored output voltage VMon monitored high range current Imon H monitored low range current L and monitored peak current Imon P measurement signals are in the range o
79. k that neither an AC input nor a bias supply failure is causing the problem and that the supply passes the turn on self test error annunciator stays off The normal turn on self test indications are described in the Checkout Procedure in Chapter 3 of the User s Guide If the supply passes the self test and there are no obvious faults you should perform the verification procedures in Chapter 2 from the front panel to determine if any functions are not calibrated or are not operating properly Then program and read back a voltage via the GPIB to see if the supply responds properly to bus commands If the supply fails any of the tests you will be directed to the applicable flow chart or troubleshooting procedure Flow Charts Troubleshooting flow charts are given in Figure 3 1 sheets 1 10 Several flow charts make reference to the test points listed in Chapter 6 The circuit locations of the test points are shown on the schematics and on the component location diagrams in Chapter 6 24 Turn on unit and observe the display Unit should display all of the segments and annunciators the address and then after self test display either an error message or go to the metering mode A3J2 5 held low lt 5 A3J2 8 gt Yes Display comes No Yes Y Y Yes Troubleshoot A1 Re place A2 5V Interface Bias circuit W6 or W7 nterface board See Error Message 9
80. le output current The current on the UUT display should be approximately full scale current negative Divide the voltage drop across the current monitoring resistor by its resistance to obtain the current sink value in amps and subtract this from the current reading on the display The difference between the readings should be within the limits specified in the performance test record chart under CURRENT SINK READBACK Low Range Current Readback Accuracy This test verifies the readback accuracy of the 20 milliampere current range a b Turn off the supply and connect the output as shown in Figure 2 1b Set the DMM to operate in current mode Turn on the supply under test and program the output voltage to zero and full scale output current The current on the UUT display should be approximately 0 mA Record the current reading on the DMM and the reading on the front panel display The difference between the two readings should be within the limits specified in the performance test record chart under 20mA RANGE CURRENT READBACK ACCURACY 6 0A Program the output voltage to 20V and record the current reading on the DMM and the reading on the front panel display The difference between the readings should be within the limits specified in the performance test record chart for the appropriate model under 20mA RANGE CURRENT READBACK ACCURACY 6 20mA Turn off the supply and connect the output and an external supply as shown in Figure 2 1c Set t
81. lue following a 50 change in the load current Loading Transient t Unloading Transient Figure 2 2 Transient Waveform a Turn off the supply and connect the output as in Figure 2 1a with the oscilloscope across the S and the S terminals b Turn on the supply and program the output voltage to the full scale value and the current to the maximum programmable value c Set the load to the Constant Current mode and program the load current to 1 2 the power supply full scale rated current d Set the electronic load s transient generator frequency to 100 Hz and its duty cycle to 50 e Program the load s transient current level to the supply s full scale current value and turn the transient generator on f Adjust the oscilloscope for a waveform similar to that in Figure 2 2 g The output voltage should return to within the specified voltage v in less than the specified time t Check both loading and unloading transients by triggering on the positive and negative slope Constant Current CC Tests CC Setup Follow the general setup instructions in the Measurement Technigues paragraph and the specific instructions given in the following paragraphs Current Programming and Readback Accuracy This test verifies that the current programming and readback are within specification a Turn off the supply and connect the current monitoring resistor across the power supply output and the DVM across the resis
82. ly when the power supply is turned on check most of the digital circuits and the programming and readback DACs Operation Verification These tests verify that the power supply is probably operating normally but do not check all of the specified operating parameters Performance Tests These tests check that the supply meets all of the operating specifications as listed in the Operating Manual NOTE The de power supply must pass the built in self tests before calibration or any of the verification or performance tests can be performed If the supply fails any of the tests or if abnormal test results are obtained refer to the troubleshooting procedures in Chapter 3 The troubleshooting procedures will determine if repair and or calibration is reguired Test Eguipment Reguired Table 2 1 lists the eguipment reguired to perform the verification and performance tests A test record sheet with specification limits and measurement uncertainties when test using the recommended test eguipment may be found at the back of this section WARNING SHOCK HAZARD These tests should only be performed by gualified personnel During the performance of these tests hazardous voltages may be present at the output of the supply Table 2 1 Test Eguipment Reguired for Verification and Performance Tests Recommended Model Current Monitor 15 A 0 1 ohm 0 04 Guildline 9230 15 Resistor for power supplies up to 15 A output DC Power Supply 5 10 Keysight 6
83. m 1 0 125W 0698 3439 1 Res 178 Ohm 1 0 125W 0757 0284 1 Res 150 Ohm 1 0 125W All 0698 3439 1 Res 178 Ohm 1 0 125W 1858 0047 1 Transistor Array 5080 2457 1 Cable A2 J210 to 7610 Diagrams Introduction This chapter contains drawings and diagrams for troubleshooting and maintaining the Keysight Model 66332A Dynamic Measurement DC Source and the Keysight Model 66332A 6632B 6633B 6634B System DC Power Supplies Unless otherwise specified in the drawings a drawing or diagram applies to all models and input voltage options General Schematic Notes e Components marked with an asterisk are model dependent See Table 6 1 e All resistors in ohms 1 1 8 W unless otherwise specified e All resistors are in ohms 1 1 8 W unless otherwise specified All capacitors are in microfarads unless otherwise specified e Unless otherwise noted bias connections to integrated circuit packages are as follows Common 5V 14 pin packages pin 7 pin 14 16 pin packages pin 8 pin 16 20 pin packages pin 10 pin 20 Table 6 1 Model dependent Components Designator 66332A 6633B 6634B Designator 66332A 6633B 6634B 6632B 6632B C300 304 307 0 047 uF C411 2 2 uF 2 2 uF C302 18000 uF 2200 uF 1200 uF C420 421 0 022 uF 0 022 uF C313 33 000 uF 18000 uF 8200 uF C422 424 425 1000 pF 220 pF C314 316 0 047 uF C423 0 047 uF 0 0047 uF C331 332 2200 pF C425 1000 pF 1000 pF C333 0 033 uF C426 0 1 uF C335 3300 pF 3300 pF 0
84. m R450 1 Ohm R354 16 2K 51 1K 80 6K R452 1K 5 11K R356 200K 249K 200K R453 10K R357 25K 22 22K 22 22K R455 2 5K 16 1K R359 0 Ohm 457 459 R362 39K 40K 40K R462 511 Ohm 51 1 Ohm R364 25K 22 22K 22 22K R463 3K R371 35 65K 25K 25K R466 1 Ohm 12 1 Ohm R372 2 5K 3 2K 3 2K R467 468 R373 100 Ohm R469 R376 35 65K 25K 25K R470 7 5 Ohm R377 39K 40K 40K R473 0 05 Ohm 0 5 Ohm R378 470 Ohm 3K 3K R488 487K 3 16M R384 389 3 3 Ohm 7 5 Ohm R489 487K 3 16M R385 2 5K 3 2K 3 2K R490 1M 6 8M R386 387 3 3 Ohm 7 5 Ohm 7 5 Ohm R496 497 13 3K 3 32K R392 5K 3K 3K R505 1 25M R393 10K 10K 4 45K 513 515 0 Ohm R394 100K 200K 164K R520 R397 3K T300 Xfmr R404 10K U314 IC R407 410 3 3 Ohm VR302 R408 409 3 3 Ohm VR303 6 2V R411 0 Ohm VR304 305 24V R412 215K VR335 6 2V 72 Diagrams 6 Table 6 2 A1 Board Component Locations 73 6 Diagrams Table 6 2 continued 74 RATE R J507 5 90000000 C374 22 7 R351 ler alma ej gt u au A 0000000 XF301 5526 0518 300 521 e mp2jye 999909 e wi o MOE R441 957 2 0309 9311 4515 CR343 2 0319 o 6l dle ala ele ani 4 R387 R408 R440 F406 R467 ES N 0308 0310 0312 0317 0430 ES meo mee mee mee fre 4 vo
85. m a GPIB controller when performing the tests The test procedures are written assuming that you know how to program the supply either remotely from a GPIB controller or locally using the control keys and indicators on the supply s front panel Complete instructions on remote and local programming are given in the User s Guide and in the Programming Guide Programming ratings are as follows 2 Verification and Performance Tests Table 2 2 Programming Ratings Voltage Rating Full Scale Rating Current Rating Full Scale Rating Keysight 20 V 20 020 V 5A 5 0045 A 66332A 6632B 50 V 50 045 V 2A 2 002 A Keysight 6633B 100 V 100 1 V 1 1 001 Keysight 6634B Constant Voltage CV Tests CV Setup If more than one meter or if a meter and an oscilloscope are used connect each to the terminals by a separate pair of leads to avoid mutual coupling effects For constant voltage dc tests connect only to 5 and S since the unit regulates the output voltage that appears between 5 and S and not between the and output terminals Use coaxial cable or shielded two wire cable to avoid noise pickup on the test leads Voltage Programming and Readback Accuracy This test verifies that the voltage programming GPIB readback and front panel display functions are_within specifications Note that the values read back over the GPIB should be identical to those displayed on the front panel a Turn off the supply and connect a digital voltmet
86. n the actual output current measurement An overvoltage detect circuit compares the output voltage to the programmed overvoltage setting When the output exceeds the programmed setting the OV_Detect signal goes low which informs the logic array that an condition has occurred The crowbar control circuit is enabled when the OV_SCR signal is received When overvoltage condition occurs the SCR control circuit generates the OV signal which causes the following actions to occur 1 The SCR fires shorting the supply s output 2 The microprocessor circuits are notified of the OV condition OV_Detect is low in order to program the output off turn off the gain stage bias and update the status of the unit 3 When a output protection clear command is executed the microprocessor circuits resets the OV circuits turns on the gain stage bias and programs the output to its previous level The fan driver control circuit provides the DC voltage to operate the cooling fan The Fan_Prog signal from the secondary interface circuit varies this voltage according to the ambient and heatsink temperature as well as the output voltage and current of the supply 53 Replaceable Parts List Introduction This section lists the replaceable parts for Keysight Models 66332A 6632B 6633B and 6634B power supplies Refer to Figures 5 1 for the location of mechanical parts with the reference designators MP Refer to the board location diagrams in Cha
87. nk 11 ImA Isink 11 1mA 818 7 20 mA Range Current Readback Readback Accuracy 0 A 2 5 pA 2 5 uA 0 1 Readback Accuracy 20 mA Tout 22 5 Tout 22 5 1 7 Readback Accuracy 20 mA Iout 22 5 Tout 22 5 1 7 PARD Current Ripple and Noise RMS 0 2 0 mA 250 uA mA Load Effect 2 5 Source Effect 2 5 Enter your test results in this column 20 Verification and Performance Tests 2 Model Keysight 6633B Report No Date Test Description Minimum Results Maximum Measurement Specs Specs Uncertainty Constant Voltage Tests Voltage Programming and Readback Low Voltage OV Vout 20 mV 20 mV 1 7 Front Panel Display Readback Vout 6 mV Vout 6 mV 1 7 uV High Voltage Full Scale Vout 49 955 V 50 045 V 717 5 uV Front Panel Display Readback Vout 21 mV Vout 21 mV 717 5 Load Effect 4 4 ww Source Effect i0mv _ 35 PARD Ripple and Noise Peak to Peak 0 mV 3mV 872 RMS 0 0 5 mV 50 Transient Response Voltage in 100 us 0 mV 50 mV 8 mV Constant Current Tests Current Programming and Readback Low current Iout 1 0 mA 1 0 mA 15 1 Iout 0 25 mA 15 1 2 002 A 252 5 uA Readback Accuracy Iout Iout 0 25 mA High Current Full Scale Iout 1 998 A Readback Accuracy Iout Iout 4 3 mA Iout 4 3 mA 252 5 Current Sink Readback Isink 4 9 mA Isink
88. nufacture or last significant design change Add 1960 to the first two digits to determine the year For example 36 1996 The third and fourth digits specify the week of the year 31 the thirty first week The last four digits 0101 are a unigue number assigned to each unit Table of Contents Warranty Information Safety Summary Notice Printing History Instrument Identification Table of Contents INTRODUCTION Organization Safety Considerations Related Documents Revisions Manual Revisions Firmware Revisions Electrostatic Discharge VERIFICATION AND PERFORMANCE TESTS Introduction Test Eguipment Reguired Measurement Technigues Setup for Most Tests Electronic Load Current Monitoring Resistor Operation Verification Tests Performance Tests Programming Constant Voltage CV Tests CV Setup Voltage Programming and Readback Accuracy CV Load Effect CV Source Effect CV Noise PARD Transient Recovery Time Constant Current CC Tests CC Setup Current Programming and Readback Accuracy Current Sink CC Operation CC Load and Line Regulation CC Load Effect CC Source Effect CC Noise PARD Performance Test Eguipment Form Performance Test Record Form TROUBLESHOOTING Introduction Test Eguipment Reguired Overall Troubleshooting Flow Charts Specific Troubleshooting Procedures Power on Self test Failures CV CC Status Annunciators Troubleshooting Bias and Reference Supplies J307 Voltage Measurements
89. oltage drops in the leads and connections connect the current monitoring resistor between the OUT and the load as a four terminal device Connect the current monitoring leads inside the load lead connections directly at the monitoring points on the resistor element Operation Verification Tests To assure that the supply is operating properly without testing all specified parameters perform the following test procedures a Perform the turn on and checkout procedures given in the Operating Manual b Perform the Voltage Programming and Readback Accuracy test and the Current Programming and Readback Accuracy tests from this procedure Performance Tests NOTE A full Performance Test consists of only those items listed as Specifications in Table A 1 of the Operating Manual and that have a procedure in this document The following paragraphs provide test procedures for verifying the supply s compliance with the specifications listed in Table A 1 of the Operating Manual of the performance test specifications and calculated measurement uncertainties are entered in the appropriate Performance Test Record Card for your specific model You can record the actual measured values in the column provided in this card If you use eguipment other than that recommended in Table 2 1 you must recalculate the measurement uncertainties for the actual eguipment used Programming You can program the supply from the front panel keyboard or fro
90. on the serial I O port This data is displayed on the LCD A2 Interface Circuits The circuits on the A2 interface board provide the interface between the GPIB interface RS 232 interface and front panel interface and the dc power supply Communication between the power supply and a GPIB controller is processed by the GPIB interface and the primary microprocessor circuits on the A2 board The A2 Interface board is assembly level replaceable it contains no user replaceable parts With the exception of the front panel microprocessor all digital circuits analog to digital converters ADC and digital to analog converters DAC in the dc power supply are located on the A2 Interface board All control signals between the A2 interface board and the A1 main board are either analog or level signals Primary Interface The primary microprocessor circuits DSP ROM and RAM chips decode and execute all instructions and control all data transfers between the controller and the secondary interface The primary microprocessor circuits also processes measurement and status data received from the secondary interface A Dual Asynchronous Control chip on the A2 board converts the RS 232 RI DFI and front panel data into the primary microprocessor s 8 bit data format The serial data is transferred between the primary interface and the secondary interface via a serial bus and optical isolator chips These chips isolate the primary interface circuits referenced
91. pter 6 for the location of electrical parts Designator Al 1 1 2 2 4 4 5 6 51 WI W2 W3 WA WS W6 W7 W10 WII WIS Model 66332A 6632B 6633B 6634B 66332A 6632B 6633B 6634B 6633B 6634B 66332A 6632B All 66332A 6632B 6633B 6634B All Table 5 1 Chassis Electrical Oty Part_Number 5063 3431 06633 61023 06634 61023 5063 3439 5063 3429 5063 3432 5063 3406 06611 60022 5063 3433 5063 3434 06632 60002 9100 5501 9100 5567 9100 5568 3101 2862 06612 80001 06612 80002 06632 80004 06612 80008 06612 80003 5080 2452 5080 2448 5080 2457 5080 2457 06612 80010 8120 4383 8120 1350 8120 1369 8120 1689 8120 0698 8120 2104 8120 2956 8120 4211 8120 4753 m m nm Lm Lm Lm Lm Lm Lm Lm Description Control PCA Tested Control PCA Tested Control PCA Tested Interface PCA Tested Interface PCA Tested Front Panel PCA Tested Binding Post PCA Binding Post PCA AC Input RFI PCA Relay PCA Tested Fan Assembly Main Transformer Main Transformer Main Transformer Rocker Switch AC Line Cable A5 to S1 Cable S1 to T1 Cable T1 to A1J303 Cable T1 to A1 J304 J305 Jumper Cable
92. rove to be defective Keysight 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 Keysight Technologies Customer shall prepay shipping charges by and shall pay all duty and taxes for products returned to Keysight Technologies for warranty service Except for products returned to Customer from another country Keysight Technologies shall pay for return of products to Customer Warranty services outside the country of initial purchase are included in Keysight Technologies product price only if Customer pays Keysight Technologies international prices defined as destination local currency price or U S or Geneva Export price If Keysight 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 Keysight Technologies LIMITATION OF WARRANTY The foregoing warranty shall not apply to defects resulting from improper or inadequate maintenance by the Customer Customer supplied software or interfacing unauthorized modification or misuse operation outside of the environmental specifications for the product or improper site preparation and maintenance NO OTHER WARRANTY IS EXPRESSED OR IMPLIED KEYSIGHT TECH
93. rts Designator C403 C405 C411 C420 C421 C422 C422 C423 C423 C424 C424 425 426 C427 C428 430 C431 432 C480 481 C482 C496 497 C498 C499 CR342 CR342 CR342 D300 303 D304 D305 306 D307 D308 D308 D309 D309 D310 60 Model 66332A 6632B 6633B 6634B 6633B 6634B 6633B 6634B 6633B 6634B 6633B 6634B 6633B 6634B 6633B 6634B 6634B 6634B 6633B 6634B 6633B 6633B 6634B 66332A 6632B 66332A 6632B 6633B 6634B 66332 6632 6633B 6634B 66332A 6632B 6633B 6634B 66332A 6632B Part Number 0160 4791 0160 3454 0160 7277 0160 6800 0160 6800 0160 6180 0160 7336 0160 6804 0160 7568 0160 6180 0160 7336 0160 4822 0160 6806 0160 0157 0160 6803 0160 5847 0160 5422 0160 6800 0180 4129 0160 4801 0160 7562 5060 3234 1205 0571 1884 0310 1901 0987 5060 3234 1205 0571 1884 0310 1901 0987 5060 3251 1884 0316 1205 0571 1901 0731 1901 1098 1901 0731 1901 1098 5060 3378 1901 1383 1205 0282 1901 1130 5060 3228 1901 0987 1205 0282 1901 1130 5060 3228 1901 0987 1205 0282 Oty Rh OB 09 pl pl pl Description Cap 10 pF 590 100V Cap 220 pF 1KV Cap 2 2 uF Cap 0 022 uF 2090 Cap 0 022 uF 20 Cap 1000 pF 20 Cap 220 pF 2090 Cap 0 047 uF 20 Cap 0 0047 uF 10 Cap 1000 pF 20 Cap 220 pF 2090 Cap 1000 pF Cap 0 1 uF Cap 4700 pF Cap
94. s in reverse order Troubleshooting 3 S1 Line Switch Removal and Replacement a First remove the front panel assembly as described under Front Panel Assembly Removal and Replacement b Release the switch from the front panel by pressing the locking tabs inward against the body of the switch and pushing the switch out of its opening NOTE When reinstalling the switch make sure that the letter O is facing up when the switch is installed in its opening A3 Front Panel Board Removal and Replacement First remove the front panel assembly as described under Front Panel Assembly Removal and Replacement Once you have access to the front panel board perform these steps a Remove the RPG knob by pulling it away from the front panel b Use a Torx T10 driver to remove the screw that secures the board to the front panel assembly c Slide the board to the left to disengage the holding clips then lift it out d To reinstall the Front Panel board perform the above steps in reverse order A1 Main Control Board a Remove the top cover and the 2 Interface board as previously described b Disconnect all cables going to connectors on the main control board NOTE Be sure to note the position and orientation of all cables prior to removal so that no mistake is made later when reinstalling these cables c If your power supply is equipped with a relay option board remove the Torx T10 screw that holds the relay board br
95. sheets included with this manual Firmware Revisions You can obtain the firmware revision number by either reading the integrated circuit label or guery the dc power supply using the GPIB IDN guery command See Chapter 3 ROM Upgrade Electrostatic Discharge CAUTION The dc power supply 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 does not occur When working on the dc power supply observe all standard antistatic work practices These include but are not limited to e Working at a static free station such as a table covered with static dissipative laminate or with a conductive table mat Keysight P N 9300 0797 or eguivalent e Using a conductive wrist strap such as Keysight 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 dc power supply before removing or installing printed circuit boards 10 Verification and Performance Tests Introduction This document contains test procedures to verify that the dc power supply is operating normally and is within published specifications There are three types of tests as follows Built in Self Tests These tests run automatical
96. t 10 Yes y Program OV to maximum and reset protection Go to sheet 3 26 If output is OK but meter wrong replace A2 If in CC but both are off check gain of Current Monitor Amplifiers and Monitor Resistor R403 473 values If the current is lower than programmed and UNReg is displayed check A1G307 and Output Stage Go to Troubleshooting Unit Does not OV sheet 11 Figure 3 1 Sheet 2 Main Flowchart continued Continued from sheet 2 Program output and readback via GPIB works Replace A2 Interface board Do full performance test to determine if unit is operating properly Figure 3 1 Sheet 3 Main Flowchart continued Troubleshooting 3 27 3 Troubleshooting Connect a DC coupled scope set to 1mS 20V div across the output and turn on the supply while observing the scope for a momentary pulse greater than the supply rating Go to Troubleshooting Yes High Output Voltage sheet 7 A Does the supply overshoot No Y Disable the OV circuit as described in paragragh Disabling Protection Features Output 9 zero volts No Yes 4V A1R350 2 A2 or W7 Defective Yes Check C336 R356 3V U306B 7 gt 8351 R349 1 2 and U306B Yes Check C335 R354 4V
97. t the supply s output terminals local or at the load remote using the S and S terminals with remote sense leads connected to the load If the output voltage goes higher than the programmed value the unit starts sinking current to reduce the output voltage When the CC loop is in control diode D325 is conducting current Current regulation is accomplished by comparing the programmed current signal CC Prog with the output current monitor signal Imon_H The Imon H signal is produced by measuring the voltage drop across the current monitoring resistor and is in the 0 to 5 range which corresponds to the zero to full scale output current range of the supply If the output current exceeds the programmed current Imon_H goes high and produces a more negative going CC signal which reduces the input to the voltage gain stage and lowers the output current Conversely if the output current is less than the programmed current Imon_H goes low and produces a more positive going CC signal which increases the input to the voltage gain stage and raises the output current When the supply is sinking current only the CV control circuit or the CCN control circuit can be active In this case the supply is acting as a load instead of a power source and will attempt to pull the output voltage down by drawing off current from the externally applied source current that will be drawn from the externally supplied source is determined by the CC_Prog signal
98. ted the energy available at many points may result in personal injury BEFORE APPLYING POWER Verify that the product is set to match the available line voltage the correct 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 GROUND THE INSTRUMENT Before switching on the instrument the protective earth terminal of the instrument must be connected to the protective conductor of the mains power cord The mains plug shall be inserted only in an outlet socket that is provided with a protective earth contact This protective action must not be negated by the use of an extension cord power cable that is without a protective conductor grounding Any interruption of the protective grounding conductor or disconnection of the protective earth terminal will cause a potential shock hazard that could result in personal injury FUSES Only fuses with the reguired rated current voltage and specified type normal blow time delay etc should be used Do not use repaired fuses or short circuited fuseholders To do so could cause a shock or fire hazard KEEP AWAY FROM LIVE CIRCUITS Operating personnel must not remove instrument covers Component replacement and internal adjustments must be made by gualified service personnel Do not replace components with power cable connected Under certain conditions dangerous voltages may
99. tions PARD in the output combine to produce a residual ac current as well as an ac voltage superimposed on the dc output Constant current CC PARD is specified as the rms output current in a frequency range 20 Hz to 20 Mhz with the supply in CC operation a Turn off the supply and connect the load monitoring resistor and rms voltmeter across the monitoring resistor as shown in Figure 2 1a The Current Monitoring resistor may have to be substituted by one with a higher resistance and power rating such as a 1 ohm 50 W current shunt in series with the appropriate 3 24 or 99 ohm resistor to get the RMS voltage drop high enough to measure with the RMS voltmeter Leads should be as short as possible to reduce noise pick up An electronic load may contribute ripple to the measurement so if the RMS noise is above the specification a resistive load may have to be substituted for this test b Check the test setup for noise with the supply turned off Other eguipment e g computers DVMs etc may affect the reading c Turn on the supply and program the current to full scale and the output voltage to the maximum programmable value d The output current should be at the full scale rating with the CC annunciator on e Divide the reading on the rms voltmeter by the monitor resistor to obtain rms current It should not exceed the values listed in the performance test record card under CC NOISE RMS Performance Test Eguipment Form
100. to earth ground from the secondary interface circuits Secondary Interface The secondary interface circuits include a programmed logic array EEPROM boot ROM 8 and 12 bit circuits and 8 and 16 bit ADC circuits The programmed logic array translates the serial data received from the primary interface into a corresponding digital signal for the appropriate DAC ADC circuits The logic array is also connected directly to four DAC ADC circuits Under control of the logic array the selected DAC converts the data on the bus into an analog signal Conversely the selected ADC converts the analog signals from the A1 board into a digital signal The logic array also directly receives status information from the A1 main board via three level sensitive signal lines which inform the array of the following operating conditions constant voltage mode CV_Detect constant current mode CC_Detect negative current mode CCN_Detect and overvoltage OV Detect The Inhibit control signal is used to shut down the bias voltage to the output stages and keep the power supply output off The OV_SCR control signal is used to fire the SCR and keep the power supply output off when an overvoltage condition has occurred 48 Principles of Operation 4 quessy zv Ajquessy 10014 1 Uon ajos t E puno 22 1885 JOJ99UUO7 100 4 aseju 494 jowe
101. 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 Description Alternating current Both direct and alternating current Three phase alternating current Earth ground terminal Protective earth ground terminal Frame or chassis terminal Terminal is at earth potential Used for measurement and control circuits designed to be operated with one terminal at earth potential Terminal for Neutral conductor on permanently installed eguipment Terminal for Line conductor on permanently installed eguipment On supply Off supply Standby supply Units with this symbol are not completely disconnected from ac mains when this switch is off To completely disconnect the unit from ac mains either disconnect the power cord or have a gualified electrician install an external switch In position of a bi stable push control Out position of a bi stable push control Caution risk of electric shock Caution hot surface Caution refer to accompanying documents Notice The information contained in this document is subject to change without notice Keysight Technologies makes no warranty of any kind with regard to this material including but not limited to the implied warranties of merchantability and fitness for a particular purpose Keysight Technologies shall not be liable for errors contained herein or for
102. tor See Current Monitoring Resistor for connection information b Turn on the supply and program the output voltage to 5 V and the current to zero c Divide the voltage drop DVM reading across the current monitoring resistor by its resistance to convert to amps and record this value Tout Also record the current reading on the front panel display The readings should be within the limits specified in the performance test record card for the appropriate model under CC PROGRAMMING 0 AMPS d Program the output current to full scale 16 Verification and Performance Tests 2 Divide the voltage drop DVM reading across the current monitoring resistor by its resistance to convert to amps and record this value Tout Also record the current reading that appears on the front panel display The readings should be within the limits specified in the performance test record card for the appropriate model under CC PROGRAMMING 6 FULL SCALE Current Sink CC Operation This test verifies current sink operation and readback a Turn off the supply and connect the output as shown in Figure 2 1a except connect a dc power supply in place of the electronic load as indicated Connect the DMM across the current shunt Set the external power supply to 5 and the current limit approximately 20 above the full scale current rating of the supply under test Turn on the supply under test and program the output voltage to zero and full sca
103. ut at nominal ac input line voltage 2 Measured with reference to Interface Ground E306 black wire 38 J307 Voltage Measurements Troubleshooting 3 J307 connects the A1 Main Board Assembly to the A2 Interface Assembly Table 3 4 provides a guick method of determining if the voltages between these assemblies are within the normal range If any of these voltages is outside the normal range refer to the flowcharts to further troubleshoot the circuit associated with the abnormal voltage e 3 4 Voltage Measurements at J307 A2 Interface to A1 Main board A1J307 Signal Name Pin 20mA E METE p ER UN META on Eg ue E ds EN TEN WE __ 24 NE IN 28 CV Mode CC Mode Full Scale Voltage Full Scale Voltage 39 3 Troubleshooting Manual Fan Speed Control Under some circumstances such as testing acoustical devices where the fan noise would interfere with the test it would be advantageous to reduce the fan speed If the test reguires a very light load the ambient temperature is low and the duration of the test is short the fan speed may be temporarily reduced The turn on default is Automatic so this procedure must be performed as needed every time the line voltage is turned on To manually control the fan speed Simultaneously depress the 0 and 9 keys EEINIT lt model gt will be displayed Using the
104. y value of load resistance the supply must act either as a constant voltage CV or as a constant current CC supply Transfer between these modes is accomplished automatically by the CV CC control circuit at a value of load resistance egual to the ratio of the programmed voltage value to the programmed current value The negative CC control circuit is activated when a current source such as another power supply is connected across the output terminals and its voltage is greater than the programmed voltage A low level CV_Detect CC_Detect or CCN_Detect signal is returned to the secondary interface to indicate that the corresponding mode is in effect When the CV loop is in control diode D328 is conducting current Voltage regulation is accomplished by comparing the programmed voltage signal CV_Prog with the output voltage monitor signal Vmon The Vmon signal is in the 0 to 5 V range which corresponds to the zero to full scale output voltage range of the supply If the output voltage exceeds the programmed voltage Vmon goes high and produces a more negative going CV signal which reduces the input to the voltage gain stage and lowers the output voltage Conversely if the output voltage is less than the programmed voltage Vmon goes low and produces a more positive going CV signal which increases the input to the voltage gain stage and raises the output voltage Depending upon the position of the sense switch the output voltage is either monitored a

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