Agilent Technologies 6571A Service Manual Download Page 87

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Replaceable Parts 87

Table 5-3. Main Chassis, Replaceable Parts

Ref. Desig.

Agilent Part No.

Description

ELECTRICAL PARTS

5060-3400

Front Panel Board, for all 667xA Models (see Table

5-4

)

Front Panel Board Tested & Initialized (see Table

5-4)

6571A

06571-61001

6572A

06572-61001

6573A

06573-61001

6574A

06574-61001

6575A

06575-61001

5060-3398

Isolator Board (see Table 5-5)

5060-3592

GPIB Board (see Table 5-6)

5060-3338

FET Board Heat Sink Assembly (see Table 5-7)

5060-3341

AC Input Board (see Table 5-8)

Control Board (see Table 5-9)

6571A, 6671A

06671-61020

6572A, 6672A

06672-61020

6573A, 6673A

06673-61020

6574A, 6674A

06674-61020

6575A, 6675A

06675-61020

Output Filter Board (see Table 5-10)

6571A, 6671A

06671-61024

6572A, 6672A

06672-61024

6573A, 6673A

06673-61024

6574A, 6674A

06674-61024

6575A, 6675A

06675-61024

Snubber Board (see Table 5-11)

6571A, 6671A

06671-61021

6572A, 6672A

06672-61021

6573A, 6673A

06673-61021

6574A, 6674A

06674-61021

6575A, 6675A

06675-61021

B1 5060-3436

Fan

assembly

C416-419 0180-4369

Capacitor 1500

F 400V

D900 --

Diode

rectifier

6571A, 6671A

1906-0396

6572A, 6672A

1906-0397

6573A, 6673A

1906-0398

6574A, 6674A

1906-0398

6575A, 6675A

1906-0404

FL1 9135-0439

Filter

RFI

J900

1251-8667

Connector post test point

L900

Choke output (

Model specific

)

6571A, 6671A

06671-80003

6572A, 6672A

06672-80003

6573A, 6673A

06673-80003

6574A, 6674A

06674-80002

6575A, 6675A

06675-80003

Summary of Contents for 6571A

Page 1: ...Agilent Model 6575A US36340101 and Above Agilent Model 6671A US36400101 and Above Agilent Model 6672A US36390101 and Above Agilent Model 6673A US36380101 and Above Agilent Model 6674A US36370101 and A...

Page 2: ...returned to Customer from another country Agilent Technologies shall pay for return of products to Customer Warranty services outside the country of initial purchase are included in Agilent Technologi...

Page 3: ...blow time delay etc should be used Do not use repaired fuses or short circuited fuseholders To do so could cause a shock or fire hazard Do not operate this instrument in the presence of flammable gas...

Page 4: ...ician install an external switch 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...

Page 5: ...ication Tests 14 Performance Tests 15 Constant Voltage CV Tests 15 Test Setup 15 Test Procedures 15 Constant Current CC Tests 19 Test Setup 19 Test Procedures 19 Averaging the CC Measurements 22 Troub...

Page 6: ...Output Power Transformer L900 Output Choke 72 AC Input Filter 72 A3 FET Board and Heatsink Assembly 73 A4 AC Input Board 74 B1 Fan 74 Principles of Operation 77 Introduction 77 INTERFACE CONTROL CIRC...

Page 7: ...listed in the title page of this manual Related Documents Change Sheet There may or may not be a Manual Change sheet included with this manual see Manual Revisions If one is included be sure to exami...

Page 8: ...l prefix on the power supply is lower than that shown on the title page then the supply was made before the publication of this manual and can be different from that described here Such differences ar...

Page 9: ...as 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...

Page 10: ......

Page 11: ...ble 1 1 of the Power Supply Operating Manual If you encounter failures or out of specification test results see Troubleshooting Procedures Chapter 3 The procedures will determine if repair and or cali...

Page 12: ...dwidth Limit 20MHz Probe 1 1 with RF tip RMS Voltmeter True RMS Bandwidth 20MHz Agilent 3400B Sensitivity 100 V Variable Voltage Transformer Power 4KVA minimum Range 13 to 6 of input GPIB Controller F...

Page 13: ...cale Max Prog Max Prog CC Voltage Voltage Current Current Overvoltage Current Agilent 6571A 6671A 8V 8 190V 220A 225 23A 10V 10A Agilent 6572A 6672A 20V 20 475V 100A 102 37A 24V 10A Agilent 6573A 6673...

Page 14: ...performing the tests Use the sheets in Tables 2 7 through Table 2 11 as master reference sheets to run copies at any time Operation Verification Tests Table 2 3 lists the requirements for operation v...

Page 15: ...s Test Setup Connect your dc voltmeter leads to only S and S see Figure 2 1 because the power supply regulates the voltage between these points not between the and output terminals Test Procedures Per...

Page 16: ...s CV Load Effect This test measures the change in output voltage resulting from a change in output current from full load to no load 1 Turn off the power supply and connect a DVM across LS and LS see...

Page 17: ...ified Source Effect limits 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 This test mea...

Page 18: ...mmable value and the voltage to its full scale value see Table 2 2 3 Program the Electronic Load as follows Operating mode to constant current Input load current to 1 2 the supply s full rated output...

Page 19: ...sistor 2 Turn on the power supply and program the output for 5 volts and 0 amperes 3 Short the load 4 Observe the DVM voltage reading Divide this by the resistance of the current monitor resistor Reco...

Page 20: ...ull scale value and the voltage to its maximum programmable value see Table 2 2 4 Adjust the load in the CV mode for full scale voltage see Table 2 2 as shown on the front panel display The power supp...

Page 21: ...ne voltage Connect the DVM across the current monitoring resistor see Figure 2 1 3 Turn on the power supply and program the current to its full scale value and the voltage to its maximum programmable...

Page 22: ...g steps show how to set up the voltmeter from its front panel to take a statistical average of l00 readings represents the unlabeled shift key in the FUNCTION RANGE group 1 Program 10 power line cycle...

Page 23: ...__________________________________ ____________________________________________________________________________________________ ________________________________________________________________________...

Page 24: ...___mV Vout 0 46mV Source Effect Vout 0 46mV _______mV Vout 0 46mV PARD Ripple and Noise Peak to Peak RMS 0 0 _______mV _______ V 7mV 650 V Transient Response Time at 900 s 0 _______mV 100mV Constant C...

Page 25: ..._______mV Vout 1 05mV Source Effect Vout 1 05mV _______mV Vout 1 05mV PARD Ripple and Noise Peak to Peak RMS 0 0 _______mV _______ V 9mV 750 V Transient Response Time at 900 s 0 _______mV 100mV Consta...

Page 26: ...out 1 9mV _______mV Vout 1 9mV Source Effect Vout 1 9mV _______mV Vout 1 9mV PARD Ripple and Noise Peak to Peak RMS 0 0 _______mV _______ V 9mV 800 V Transient Response Time at 900 s 0 _______mV 100mV...

Page 27: ...V _______mV Vout 3 2mV Source Effect Vout 3 2mV _______mV Vout 3 2mV PARD Ripple and Noise Peak to Peak RMS 0 0 _______mV _______mV 11mV 1 25mV Transient Response Time at 900 s 0 _______mV 100mV Const...

Page 28: ...4mV _______mV Vout 6 4mV Source Effect Vout 6 4mV _______mV Vout 6 4mV PARD Ripple and Noise Peak to Peak RMS 0 0 _______mV _______mV 16mV 1 9mV Transient Response Time at 900 s 0 _______mV 120mV Con...

Page 29: ...removing the covers you can use the Verification tests in Chapter 2 to determine if the power supply is operating normally Chapter Organization The information in this chapter is organized as follows...

Page 30: ...f the power supply fails the selftest the output remains disabled turned off and the front panel normally displays an error code or message see Table 3 2 The message is displayed indefinitely and the...

Page 31: ...ower on and TST Microprocessor A5U504 E10 SEC 5V Secondary interface 5 volt readback test failed power on and TST Comparators A5U513 readback DAC A5U511 U512 or secondary bias supply 5Vs A4U304 E11 TE...

Page 32: ...4 OV circuit is on at turn on from Figure 3 1 Figure 3 5 Output level is held low from Figure 3 1 Figure 3 6 Output level is held high from Figure 3 1 Figure 3 7 DAC circuits from Figure 3 1 Figure 3...

Page 33: ...Troubleshooting 33 Figure 3 1 Overall Troubleshooting Sheet 1 of 4...

Page 34: ...34 Troubleshooting Figure 3 1 Overall Troubleshooting Sheet 2 of 4...

Page 35: ...Troubleshooting 35 Figure 3 1 Overall Troubleshooting Sheet 3 of 4...

Page 36: ...36 Troubleshooting Figure 3 1 Overall Troubleshooting Sheet 4 of 4...

Page 37: ...Troubleshooting 37 Figure 3 2 No Display Troubleshooting...

Page 38: ...38 Troubleshooting Figure 3 3 OV Will Not Fire Troubleshooting...

Page 39: ...Troubleshooting 39 Figure 3 4 OV At Turn On Troubleshooting Sheet 1 of 2...

Page 40: ...40 Troubleshooting Figure 3 4 OV At Turn On Troubleshooting Sheet 2 of 2...

Page 41: ...Troubleshooting 41 Figure 3 5 Output Held Low Troubleshooting Sheet 1 of 2...

Page 42: ...42 Troubleshooting Figure 3 5 Output Held Low Troubleshooting Sheet 2 of 2...

Page 43: ...Troubleshooting 43 Figure 3 6 Output Held High Troubleshooting...

Page 44: ...44 Troubleshooting Figure 3 7 DAC Circuits Troubleshooting...

Page 45: ...Troubleshooting 45 Figure 3 8 DAC Test Waveforms...

Page 46: ...46 Troubleshooting Figure 3 9 CV CC DAC and Amplifier Circuit Troubleshooting...

Page 47: ...Troubleshooting 47 Figure 3 10 Serial Down Troubleshooting Sheet 1 of 2...

Page 48: ...48 Troubleshooting Figure 3 10 Serial Down Troubleshooting Sheet 2 of 2...

Page 49: ...Troubleshooting 49 Figure 3 11 Isolator Board Troubleshooting...

Page 50: ...50 Troubleshooting Figure 3 12 Secondary Interface Down Sheet 1 of 2...

Page 51: ...Troubleshooting 51 Figure 3 12 Secondary Interface Down Sheet 2 of 2...

Page 52: ...52 Troubleshooting Figure 3 13 Slow Downprogramming Troubleshooting...

Page 53: ...assis see Disassembly Procedures 3 Lay the board component side up on a piece of insulating material adjacent and close to the supply 4 Make the following connections a Ribbon cable W3 from A5J509 to...

Page 54: ...d schematic diagram 6 Check bias voltage at U203 1 5V 7 While adjusting the external 15V supply input check the bias trip point at U204 1 Voltage goes from low 0V to high 5V at an input of approximate...

Page 55: ...Troubleshooting 55 Figure 3 14 A3 FET Board Test Waveforms...

Page 56: ...ious IC is correct then look for an open printed circuit track or soldering problems 6 If the output signature of an IC is incorrect it could be caused by that IC However it could also be caused by a...

Page 57: ...and 6 RELAY LINK Install jumper here to configure DIG CNTL port for control of external relay accessories See Appendix D in Power Supply Operating Manual for information about the digital control por...

Page 58: ...nect signature analyzer CLOCK START STOP and GROUND inputs as show in Figure 3 16 4 Turn on the power supply and use the signature analyzer probe to take the following signatures Power 5V 9FFP Serial...

Page 59: ...Troubleshooting 59 Figure 3 17 Signature Analysis Connections for Model 657xA Only...

Page 60: ...60 Troubleshooting Figure 3 17 Signature Analysis Connections for Model 667xA Only...

Page 61: ...n A1 Front Panel Board see Figure 3 15 4 Connect signature analyzer CLOCK START STOP and GROUND inputs and setup as shown in Figure 3 16 5 Turn on the power supply and use the signature analyzer probe...

Page 62: ...the signature analyzer probe to take the following signatures Power 5 V lC4C Microprocessor A5U504 1 F77H A5U504 21 0C98 A5U504 2 C98P A5U504 22 5PC7 A5U504 3 1573 A5U504 23 0000 A5U504 4 P42A A5U504...

Page 63: ...e Operating Manual As shipped from the factory the supply s model number e g 6671 is the password If you use an incorrect password PASSWD ERROR appears on the display during front panel calibration or...

Page 64: ...pauses and asks you to make a selection respond as follows Initialization I or Factory Preset Replacement F F The new calibration constants will then be stored Pre initialized and tested A1 Front Pane...

Page 65: ...8 380 390 Eprom_data_6x73 EEPROM data for 6573A and 6673A 400 DATA 111 16 35 35 8 0 99 0 53 39 100 61 5 0 410 DATA 82 1 18 68 79 5 42 0 99 255 20 10 420 DATA 6573 92 166 322 52 162 759 11768 5 255 0 0...

Page 66: ...RESTORE Eprom_data_6x72 930 CASE 6673A 940 RESTORE Eprom_data_6x73 950 CASE 6674A 960 RESTORE Eprom_data_6x74 970 CASE 6675A 980 RESTORE Eprom_data_6x75 990 1000 CASE ELSE 1010 PRINT Model number not...

Page 67: ...Err THEN 1350 PRINT Change pass code to the power supply model or zero then restart the program 1360 STOP 1370 ELSE 1380 GOTO Start 1390 END IF 1400 END IF 1410 1420 Start 1430 1440 1450 INPUT Select...

Page 68: ...ration data destination 1830 DATA 84 88 92 96 100 104 108 112 116 1840 1850 Fact_cal_len Length of factory calibration data 1860 DATA 4 4 4 4 4 4 4 4 2 1870 1880 RESTORE Fact_cal_sour 1890 FOR I 1 TO...

Page 69: ...teners will damage threaded inserts Older power supplies use TORX screws for securing the carrying straps When removing or installing these screws use TORX screwdriver size T 15 unless T 10 is specifi...

Page 70: ...t screws that are inset in the knobs These are the AlG1 and AlG2 Voltage Current control shafts that extend through the front panel Remove knobs and shaft bushings Note Be careful not to unscrew the k...

Page 71: ...4 667xA Only Release GPIB board from holding bracket and remove board from the chassis Output Subchassis The Output Subchassis houses the A5 Control Board A6 Output Board A7 Snubber Board power outpu...

Page 72: ...r 1 Remove two bolts securing the leads from the Snubber Board and transformer T900 to output rectifiers D900 mounted on the heat sink assembly 2 Remove screw securing the Snubber Board to the heat si...

Page 73: ...Input Board c 2 wire cable W7 from A3J200 on the FET Board 2 Remove screw securing the FET heatsink to the fan assembly 3 Remove screw securing the FET heatsink to the bottom of the main chassis 4 Sli...

Page 74: ...e mica insulator see Replaceable Parts between each MOSFET and the heat sink A4 AC Input Board 1 Remove the A3 FET Board and Heatsink Subassembly as described in the combined procedure 2 Disconnect th...

Page 75: ...Troubleshooting 75 Figure 3 20 Component Locations Top Cover and RFI Shield Removed...

Page 76: ......

Page 77: ...on the A5 Control Board The primary microprocessor also processes measurement and status data received from the Secondary Interface A UART universal asynchronous receive transmit IC U112 on the A2 boa...

Page 78: ...nterval After a delay of 40 ms SPCLR goes high and the microprocessor is enabled By inhibiting microprocessor operation for 40 ms any erroneous operation due to a rising but yet unstable 5V is prevent...

Page 79: ...A CC DAC OP amplifier U509 U510 converts the programmed value of current on the bus into the CCPROG signal CCPROG is sent to the CC control circuits to control the magnitude of the output current in...

Page 80: ...dc signal VPROG can also be used to program the output voltage A 0 to 5V VPROG level produces a proportional zero to full scale output voltage In CC mode an OR gate diode D615 conducts and the CC loo...

Page 81: ...ified and filtered to provide the RAIL 290 volts input lines to the A3 FET Board Because filter capacitors are connected directly across the rectified line RAILS large inrush current surges at turn on...

Page 82: ...FET switches thereby determining the magnitude of the output voltage or current DRIVEl pulses turn on one set of RAIL Q201 Q211 and Rail Q203 Q233 FETS causing current to flow through power transforme...

Page 83: ...Principles Of Operation 83 Figure 4 1 Agilent Series 665xA 667xA Power Supply Block Diagram...

Page 84: ......

Page 85: ...e locations of circuit board assemblies and chassis mounted components are shown in Figure 3 20 Reading the Tables Each table lists electrical components alphabetically by reference designator and pro...

Page 86: ...ystal gnd ground mtg mounting thrd thread lg long PCB pc board w with How To Order Parts You can order parts from your local Agilent Technologies Sales and Support Office see the list of offices in th...

Page 87: ...673A 06673 61020 6574A 6674A 06674 61020 6575A 6675A 06675 61020 A6 Output Filter Board see Table 5 10 6571A 6671A 06671 61024 6572A 6672A 06672 61024 6573A 6673A 06673 61024 6574A 6674A 06674 61024 6...

Page 88: ...AC Input bd W7 5080 2170 Cable assy 2 wire A3 FET bd to A5 Control bd W8 5080 2171 Cable assy 2 wire A3 FET bd to A4J400 on A4 AC Input bd W9 5080 2178 Cable assy 2 wire A3 FET bd to rails on A4 AC I...

Page 89: ...nt panel RPG control 6571A 06571 80001 Nameplate 6572A 06572 80001 Nameplate 6573A 06573 80001 Nameplate 6574A 06574 80001 Nameplate 6575A 06575 80001 Nameplate 6671A 06671 80001 Nameplate 6672A 06672...

Page 90: ...e busbar to support output choke output xfmr diode block 0515 0433 Screw mch M4x0 7 8 mm lg cap RFI fan brkt GPIB cover A6 output Filter bd gnd A5 Control bd to subchassy diode block and A7 Snubber bd...

Page 91: ...MISCELLANEOUS 5080 2148 Chaining cable for power supply link 1252 1488 Quick disconnect mating plug for DIG CNTL connector on rear panel 1252 3698 Quick disconnect mating plug for analog connector on...

Page 92: ...3 1251 4926 Receptacle test header J4 5 1252 0718 Receptacle A3G1 A3G2 J6 1251 8184 Receptacle phone GPIB board L1 9140 0158 Inductor 1 H 10 R1 1810 0560 Resistor network DIP R2 0698 3359 Resistor 12...

Page 93: ...901 0731 Diode power rectifier F800 2110 0951 Fuse subminature 5 AT J800 801 1251 8184 Receptacle modular phone J802 1251 4926 Connector test point header J803 1251 4245 Connector 2 pin male R800 0757...

Page 94: ...08 1251 7330 Connector Receptacle J114 1251 7330 Connector Receptacle J115 1251 7330 Connector Receptacle P101 1251 4245 Connector Plug 2 pin AC Bias U110 U111 1990 0444 IC Optoisolator U113 1990 0543...

Page 95: ...eceptacle Q201 Q202 Q203 Q204 1854 1784 Transistor MOSFFET VCE 600V IC 40A matched set R201 0699 7384 Resistor 150 1 30W R213 R216 R220 R224 0699 7383 Resistor 75 1 30W T202 9100 4350 Transformer Curr...

Page 96: ...Capacitor 0 01 F 10 C431 0160 4065 Capacitor 0 1 F C497 498 0160 7606 Capacitor 1 F 250V CR402 1990 0517 LED visible D306 310 312 317 1901 0731 Diode power rectifier D318 319 1901 1098 Diode 1N4150 D...

Page 97: ...100 5 2W R381 0698 4150 Resistor 115 1 0 25W R382 0683 3305 Resistor 33 5 0 25W R383 0757 0401 Resistor 100 1 0 125W R384 0757 0280 Resistor 1K 1 0 125 W R399 0699 0208 Resistor 1 5 0 25W R400 401 069...

Page 98: ...n MECHANICAL PARTS 2110 0726 Fuse clip F304 308 401 2110 0870 Fuse clip 13 32 F400 1205 0282 Heatsink U302 306 307 1205 0402 Heatsink U304 305 0590 1397 Nut F400 clips 0515 0070 Screw M4 x 0 7 F400 cl...

Page 99: ...7 F 20 C533 0180 4131 Capacitor 4 7 F 35V C550 555 0160 4835 Capacitor 0 1 F 10 50V C556 558 0180 4129 Capacitor 1 F 35V C600 0180 4131 Capacitor 4 7 F 35V C601 0160 4835 Capacitor 0 1 F 10 50V C602 0...

Page 100: ...6575A 6675A 0160 5410 Capacitor 3300pF 5 C682 0160 4799 Capacitor 2 2pF C683 Model specific 6571A 6671A 0160 5468 Capacitor 0 47 F 50V 6572A 6672A 0160 5469 Capacitor 1 F 10 6573A 6673A 6574A 6674A 0...

Page 101: ...6672A 0160 5098 Capacitor 0 22 F 10 6573A 6673A 0160 4835 Capacitor 0 1 F 10 50V 6574A 6575A 6674A 6675A 0160 4834 Capacitor 0 47 F 10 C717 Model specific 6571A 6574A 6671A 6674A 0160 4808 Capacitor 4...

Page 102: ...GEN PRP D620 621 626 627 630 631 641 1901 1098 Diode 1N4150 D651 1901 0880 Diode GEN PRP D660 661 1901 1098 Diode 1N4150 D662 665 1901 0880 Diode GEN PRP D666 668 1901 1098 Diode 1N4150 D676 1901 0880...

Page 103: ...62 Resistor 46 4K 1 R535 0757 0280 Resistor 1K 1 0 125W R540 0757 0273 Resistor 3 01K 1 R541 0698 3155 Resistor 4 64K 1 R542 0757 0442 Resistor 10K 1 0 125W R543 0757 0289 Resistor 13 3K 1 R544 0757 0...

Page 104: ...666 Model specific 6571A 6671A Not used 6572A 6672A 0757 0199 Resistor 21 5K 1 6573A 6673A 0757 0441 Resistor 8 25K 1 6574A 6674A 0757 0447 Resistor 16 2K 1 6575A 6675A 0698 3157 Resistor 19 6K 1 R66...

Page 105: ...Resistor 432K 1 6574A 6674A 0699 1254 Resistor 536K 1 0 125W 6575A 6675A 0699 0070 Resistor 3 16 M 1 R691 Model specific 6571A 6671A 0757 0442 Resistor 10K 1 0 125W 6572A 6672A 0757 0451 Resistor 24...

Page 106: ...1 0 l25W 6572A 6672A 0699 0088 Resistor 1 21M 1 6573A 6673A 6574A 6674A 0683 2755 Resistor 2 7M 1 0 25W 6575A 6675A 0683 6855 Resistor 6 8M 5 0 25W R715 0698 3279 Resistor 4 99K 1 R717 0699 0070 Resis...

Page 107: ...istor 301 1 0 125W 6572A 6672A 6573A 6673A 0699 0083 Resistor 681 0 1 0 1W 6574A 6674A 0699 0211 Resistor 859 0 1 6575A 6675A 0698 7163 Resistor 2 0081K 0 1 R769 0698 3279 Resistor 4 99K 1 R770 Model...

Page 108: ...757 0280 Resistor 1K 1 0 125W R835 0757 0465 Resistor 100K 1 R836 0698 4479 Resistor 14K 1 0 125W R837 0698 3456 Resistor 287K 1 R839 0699 0088 Resistor 1 2M 1 R840 0698 8827 Resistor 1 M 1 0 125W R85...

Page 109: ...370 IC 365 U600 1820 3199 IC MC74HC4040N U601 1820 2922 IC MC74HC00N U602 1820 3081 IC MC74HC74N U603 1826 2343 IC VRGLTR SWG U604 1820 2922 IC MC74HC00N U605 1826 0065 IC 31 1 U606 1858 0083 Transist...

Page 110: ...0180 4333 Capacitor 22 000 F 16V 6572A 6575A 6672A 6675A 0180 4381 Capacitor 20 000 F 25V C905 Model specific 6571A 6671A 0180 4333 Capacitor 22 000 F 16V 6572A 6672A 0180 4381 Capacitor 20 000 F 25V...

Page 111: ...71A 6573A 6671A 6673A 2110 0713 Fuse submin 10AM 125V 6574A 6674A 2110 0699 Fuse submin 5AM 125V 6575A 6675A 2110 0685 Fuse submin 7AM 125V F902 Model specific 6571A 6571A 6672A 6672A 2110 0713 Fuse s...

Page 112: ...6573A 6575A 6673A 6675A 1855 1003 MOSFET Q903 Model specific 6571A 6671A 6572A 6672A Not used 6573A 6575A 6673A 6675A 1855 1003 MOSFET Q910 Model specific 6571A 6671A Not used 6572A 6575A 6672A 6675A...

Page 113: ...5A 6673A 6675A 0699 1075 Resistor 0 1 1 3W R915 Model specific 6571A 6574A 6671A 6674A 0757 0273 Resistor 3 01K 1 6575A 6675A 0698 3358 Resistor 4 02K 1 R916 0698 0082 Resistor 464 1 0 125W R917 Model...

Page 114: ...4946 Transformer power 6573A 6673A 9100 4945 Transformer power 6574A 6674A 9100 4910 Transformer power 6575A 6675A 9100 4944 Transformer power U901 Model specific 6571A 6671A Not used 6572A 6575A 667...

Page 115: ...6573A 6673A 5080 2177 6574A 6674A Not used 6575A 6675A 5080 2177 W916 917 Model specific 6571A 6574A 6671A 6674A Not used 6575A 6675A 5080 2177 W918 W921 Model specific 6571A 6671A 6572A 6672A Not us...

Page 116: ...3A 6673A 0160 6030 Capacitor 0 01 F 400V 6574A 6575A 6674A 6675A 0160 6838 Capacitor 2200pF 1KV R990 991 Model specific 6571A 6671A 572A 6672A 0698 3601 Resistor 10 5 2W MO 6572A 6672A 6573A 6673A 069...

Page 117: ...n Table 6 4 Al Front Panel Board A2 GPIB Board Used in 667xA Series only A2 Isolator Board Used in 657xA Series only A3 FET Board A4 Input AC Power Board A5 Control Board 3 sheets Secondary Interface...

Page 118: ...alid GPIB PRX Primary receive serial data DFI Discrete fault indicator PTX Primary transmit serial data DFI EN Discrete fault indicator enable PWM_EN Pulse width modulator enable DPS Downprogramming s...

Page 119: ...een 0 and 5V U119 4 FPRX Primary receive from front panel serial data line Toggles between 0 and 5V U119 18 FPTX Primary transmit to front panel serial data line Toggles between 0 and 5V A2 Isolator B...

Page 120: ...easurements at test points through R333 5V secondary bias 5 0 2V R331 15Vs secondary bias 15 0 9V C353 26V 24 4V to 28 6V R330 15Vs secondary bias 15 0 9V C354 25V 22 5V to 27 5V U310 6 RELAY ON 0V U3...

Page 121: ...g a Programming Voltage scale b Current scale c OV full scale 2 First measurement in CV mode with no load 3 Second measurement in CC mode with output shorted U615 1 VMON Sheet 2 CV mode 4 6V CC mode 0...

Page 122: ...t 3 See Figure 6 1 U603 3 PWM_EN Sheet 3 Held high for approximately 12 seconds at power on then goes low U603 13 VOS Sheet 3 5 0 2V NOTE Temporarily move both scope leads to J503 for TP J503 1 2 DRV...

Page 123: ...s that are terminated by flags continue on other sheets and may also go to other locations on the same sheet Example CVPROG SH 2 8C SH 2 8C indicates the sheet number and the coordinates on that sheet...

Page 124: ...124 Diagrams Figure 6 1 Test Point Waveforms for Table 6 3...

Page 125: ...Diagrams 125 Figure 6 2 Circuit Board Cabling Diagram...

Page 126: ...126 Diagrams Figure 6 3 A1 Front Panel Board Component Location Diagram...

Page 127: ...Figure 6 4 A1 Front Panel Board Schematic Diagram...

Page 128: ...Figure 6 5 A2 GPIB Board Assembly Diagram 667xA only...

Page 129: ...2 3 4 1 6 5 Figure 6 6 A2 GPIB Board Schematic Diagram 667xA only 7 8...

Page 130: ...Figure 6 7 A3 FET Board Assembly Diagram and Test Point Locations...

Page 131: ...0699 3974 14 7K A 0699 3987 51 1K A 0699 3988 61 9K A 350 0699 4285 5 1W 1 LM339 1826 GND V 1528 LM339 1826 GND V 1528 MJD45H11 1853 0655 1906 0291 1901 1335 1901 1335 1901 1335 1902 1542 6 2V_5 80UH...

Page 132: ...9 10 11 15 13 12 17 18 19 24 22 23 25 21 20 Figure 6 9 A4 AC Input Board Assembly Diagram and Test Point Locations 14 16...

Page 133: ...Figure 6 10 A4 AC Input Board Schematic Diagram 15 13 17 18 25 21 20 16 9 10 11 12 19 24 22 23 14...

Page 134: ...45 44 46 47 69 68 67 50 51 62 55 61 60 52 58 57 41 42 66 65 63 43 48 70 49 53 59 54 56 40 39 37 36 Figure 6 11 A5 Control Board Assembly Diagram and Test Point Locations 64 38...

Page 135: ...Figure 6 12 A5 Board Sec CV CC Readback DACs Schematic sheet 1 64 37 38 36 39 40...

Page 136: ...Figure 6 12 A5 Board CV CC Control Circuits Schematic sheet 2 40 45 46 39 41 42 47 43 48 44...

Page 137: ...Figure 6 12 A5 Board Switch Downprog OV Monitor Schematic sheet 3 60 56 61 68 67 69 66 59 57 58 62 55 54 53 52 49 51 50 70 64 63 65...

Page 138: ...Figure 6 13 A6 Output Filter A7 Snubber Boards Assembly Diagrams 65 6671A 72A...

Page 139: ...Figure 6 14 A6 Output Filter A7 Snubber Boards Schematic Diagrams 65 6671A 72A A7 Snubber Board...

Page 140: ...Figure 6 15 A6 Output Filter A7 Snubber Boards Assembly Diagrams 65 6673A 74A...

Page 141: ...A7 Snubber Board Figure 6 16 A6 Output Filter A7 Snubber Boards Schematic Diagrams 65 6673A 75A 6673A 74A A7 Snubber Board 6675A only 6675A only...

Page 142: ...Figure 6 17 A6 Output Filter A7 Snubber Boards Assembly Diagrams 65 6675A...

Page 143: ...Figure 6 18 A2 Isolator Board Assembly and Schematic Diagram for 654xA 655xA Models Only...

Page 144: ...PHONE CONNECTOR PIN DESIGNATIONS 5 3 1 6 4 2 2 3 4 5 6 7 8 REFERENCED TO SUPPLY COMMON REFERENCED TO EARTH GROUND 600V ISOLATION Figure 6 19 A2 Isolator Board Assembly and Schematic Diagram 667xA onl...

Page 145: ...Change Model 6571A 3206A 00103 8 9 3222A 00118 7 3222A 00123 14 All 17 19 22 37 3635A 00143 39 40 Model 6572A 3203A 00103 8 3203A 00108 7 9 10 11 3216A 00123 14 3422A 00138 37 3626A 00218 39 3635A 00...

Page 146: ...19 22 36 3502A 00551 38 3619A 00796 39 3632A00932 40 CHANGE 1 In Table 5 9 CHANGE Capacitor from 100pF 5 Agilent P N 0160 4801 to resistor zero ohm Agilent P N 8159 0005 Circuit Reference C506 NOTE Th...

Page 147: ...ent PN 0699 0118 to 19K 0 05 1 8w Agilent P N 0699 3103 Qty 1 3 Resistor R809 from 16 15K 0 1 1 8w Agilent PN 0699 0489 to 19K 0 05 1 8w Agilent P N 0699 3133 Qty 1 CHANGE 5 In Table 5 9 CHANGE Capaci...

Page 148: ...9 DELETE Resistor R550 4 99K 1 1 8W Agilent P N 0698 3279 Qty 1 ADD Resistor R896 4 99K 1 1 8W Agilent P N 0698 3279 Qty 1 CHANGE 1 Zener diode VR630 from 6 2V 2 0 4 W H P P N 1902 0509 to 6 19V 2 0 4...

Page 149: ...4832 Qty 1 2 Resistor R134 from 100 Ohm 5 1 4W Agilent P N 0683 1015 to 1K 5 1 4W Agilent P N 0683 1025 Qty 1 CHANGE 13 In Table 5 6 The power supply unit will not operate with Agilent relay boxes 595...

Page 150: ...910 For MODEL OPTION 6671A 910 For MODEL OPTION 6674A 910 Service Manual from Agilent P N 5959 3337 to Agilent P N 5959 3384 Qty 1 CHANGE 20 In Table 5 3 CHANGE Operating Manual from Agilent P N 5959...

Page 151: ...N 1855 0849 Qty 8 to FET MACHED Set Agilent P N 5080 2241 QTY 1 CHANGE 24 In Table 5 6 CHANGE Diode Zener VR102 FROM 11V 2 Agilent P N 1902 3172 to 11V 5 Agilent P N 1902 0959 Qty 1 CHANGE 25 In Tabl...

Page 152: ...5 7 CHANGE 1 Heat sink Ref D400 from Agilent P N 12050766 to Agilent P N 1205 0861 Qtv 1 2 Heat sink Ref D400 from Agilent P N 1205 0766 to Agilent P N 1205 0861 Qty 1 CHANGE 32 In Table 5 3 CHANGE Fu...

Page 153: ...dd D910 D911 R910 and VR902 to the down programming circuit This section of the circuit should match Figure 6 16 These components are model dependent In Table 5 6 on page 98 Change the part number of...

Page 154: ......

Page 155: ...ts factory 67 calibration password 67 calibration post repair 67 calibration procedure 11 CC annunciator 57 CC load effect testing 24 CC noise PARD testing 24 CC PARD defined 24 Circuits isolator boar...

Page 156: ...ling 131 DIG CNTL port configuring 61 disassembly procedures 73 downprogrammer FETs location of 75 E electronic load 16 23 error checksum 35 error code E1 35 E10 35 E11 35 E12 35 E2 35 E3 35 E4 35 E5...

Page 157: ...isions 60 Form performance test record 27 front panel EEPROM factory cal location 68 initialization of 68 transferring constants to 68 front panel operation 11 front panel testing 34 G GPIB error 2 67...

Page 158: ...erformance test record form 27 performance tests CC 23 performance tests CV 20 power FETs replacing 121 122 power on selftest 34 power on selftest disabling 34 protective earth ground 13 R record shee...

Page 159: ...es identical 60 SA signatures similar 60 SA test header jumper 61 Schematic notes 129 SCPI programming 11 secondary interface testing 34 sense terminals 17 serial number 12 serial number prefix 12 set...

Page 160: ...st record 27 TORX screws 72 transformer variable voltage 16 transient recovery time 16 Troubleshooting test points 125 troubleshooting chart output held high 47 ov at turn on 43 secondary downprogramm...

Page 161: ...09 Information about the A3 FET assembly has been updated The surface mount A3 FET assembly is the recommended replacement part for previous version A3 assemblies 7 09 The performance test records on...

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