SERVICE MANUAL AUTORANGING SYSTEM DC POWER SUPPLY AGILENT MODELS 6033A and 6038A FOR INSTRUMENTS WITH SERIAL NUMBERS Agilent Model 6033A; Serials US38320231 and above Agilent Model 6038A; Serials US38310401 and above For instruments with higher serial numbers, a change page may be included. Agilent Part No. 5959-3346 Microfiche Part No.
CERTIFICATION Agilent Technologies certifies that this product met its published specifications at time of shipment from the factory. Agilent Technologies further certifies that its calibration measurements are traceable to the United States National Bureau of Standards, to the extent allowed by the Bureau's calibration facility, and to the calibration facilities of other International Standards Organization members.
SAFETY SUMMARY The following general safety precautions must be observed during all phases of operation, service and repair of this instrument. Failure to comply with these precautions or with specific warnings elsewhere in this manual violates safety standards of design, manufacture, and intended use of the instrument. Agilent Technologies, Inc. assumes no liability for the customer's failure to comply with these requirements. BEFORE APPLYING POWER.
Safety Symbol Definitions Symbol Description Symbol Description Direct current Terminal for Line conductor on permanently installed equipment Alternating current Caution, risk of electric shock Both direct and alternating current Caution, hot surface Three-phase alternating current Caution (refer to accompanying documents) Earth (ground) terminal In position of a bi-stable push control Protective earth (ground) terminal (Intended for connection to external protective conductor.
TABLE OF CONTENTS Introduction ............................................................................................................................................................................ 9 Scope .................................................................................................................................................................................... 9 Calibration and Verification ........................................................................................
Signature Analysis .............................................................................................................................................................. 41 Primary SA ..................................................................................................................................................................... 41 Front Panel SA.........................................................................................................................................
Replaceable Parts.................................................................................................................................................................. 73 Introduction......................................................................................................................................................................... 73 Ordering Information ...........................................................................................................................
1 Introduction Scope This manual contains information for troubleshooting the Agilent 6033A/6038A 200W Autoranging Power Supply to the component level. Wherever applicable, the service instructions given in this manual refer to pertinent information provided in the Operation Manual. Both manuals cover Agilent Models 6033A/6038A; differences between models are described as required. The following information is contained in this manual.
Manual Revisions Agilent Technologies instruments are identified by a 10-digit serial number. The format is described as follows: first two letters indicate the country of manufacture. The next four digits are a code that identify either the date of manufacture or of a significant design change. The last four digits are a sequential number assigned to each instrument. Item Description US The first two letters indicates the country of manufacture, where US = USA.
2 Calibration and Verification Introduction This section provides test and calibration procedures. The operation-verification tests comprise a short procedure to verify that the unit is performing properly, without testing all specified parameters. After troubleshooting and repair of a defective power supply you can usually verify proper operation with the turn-on checkout procedure in the Operating Manual.
Table 2-1. Test Equipment Required TYPE Oscilloscope RMS Voltmeter Logic Pulser Multimeter Signature Analyzer GPIB Controller Current Probe Electronic Load Power Resistor* Current-Monitoring Shunts Calibration and Test Resistors Terminating Resistors (2) Blocking Capacitors (2) Common-mode Toroidal Core Switch* DC Power Supply REQUIRED CHARACTERISTICS Sensitivity: 1 mV Bandwidth: 20MHz & 100MHz Input: differential, 50 Ω & 10MΩ True rms, 10MHz bandwidth Sensitivity: 1 mV Accuracy: 5% 4.5 to 5.
Table 2-2. Guide to Recalibration After Repair Printed Circuit Board Block Name Ref. Desig.
Table 2-2. Guide to Recalibration After Repair (continued) Printed Circuit Board Block Name Ref. Desig.
Maintenance described herein is performed with power supplied to the instrument, and protective covers removed. Such maintenance should be performed only by trained service personnel who are aware of the hazards involved (for example, fire and electrical shock). Where maintenance can be performed without power applied, the power should be removed. Voltage Monitor Zero Calibration a. b. c. d. Send string "VSET 0; ISET 0; OUT OFF". Short power supply output terminals.
Remote Readback Zero Calibration Note: a. b. c. d. e. f. g. h. This procedure and the following three procedures must be done as a set, without omitting any of the four procedures. Also, the following four procedures require that V-MON ZERO (A2R22) be adjusted within specifications. If it is not, perform the Voltage Monitor Zero Calibration before proceeding. Connect an external supply to the power supply as shown in Figure 2-2. Send string "VSET 0; ISET 5; OUT ON''.
c. d. e. Attach the DVM from - S to + S terminals on rear panel. Adjust A8R58 (CV PROG F.S.) to: 20.0025 ±600µV (6033A). 60.0075 ±1.82mV (6038A). After adjusting A8R58 you must continue the calibration procedure through to the completion of Constant Voltage Zero Calibration. Voltage Monitor and Remote Readback Full Scale Calibration Note: a. b. c. d. e. f. g. Perform this procedure only after completing Constant Voltage Full Scale Calibration.
Constant Current Zero Calibration a. b. c. d. Connect the test setup shown in Figure 2-3. Send string ''VSET 5; ISET 0; OUT ON''. Allow several minutes (3 or more) to ensure thermal settling. Adjust A8R29 (CC PROG ZERO) to: 0V ±1mV (6033A). 0V ±350µV (6038A). Figure 2-3. CC Zero Calibration Setup Current Monitor Full Scale Calibration Note: a. b. c. d. e. f. 18 This procedure requires that I-MON ZERO (A2R8) be adjusted within specifications.
Constant Current Full Scale Calibration Note: a. b. c. d. This procedure requires that CC PROG ZERO (A8R29) and I-MON F. S. (A2R9) be adjusted within specifications. If they are not, perform Constant Current Zero and/or Current Monitor Full Scale Calibration before proceeding. Connect Rm current-monitoring shunt: (10 milliohm, 6033A) (100 milliohm, 6038A) 0.05% or better across power supply output terminals. Send string: "VSET 5; ISET 30; OUT ON" (6033A). "VSET 5, ISET 10; OUT ON'' (6038A).
d. e. f. Attach the DVM from P to VP on the rear panel. Adjust A2R23 (R-PROG F.S.) to 2.5V ±4mV. Remember to reset MODE switches to original settings. Performance Tests The following paragraphs provide test procedures for verifying the unit's compliance with the specifications of Table 1-1 in the Operating Manual. Please refer to CALIBRATION PROCEDURE or TROUBLESHOOTING if you observe out-of-specification performance.
Figure 2-4. Current-Monitoring Resistor Setup GPIB Controller. Most performance tests can be performed using only front-panel controls. However, a GPIB controller is required to perform the voltage and current programming accuracy tests and the voltage and current readback accuracy tests. Constant Voltage (CV) Tests CV Setup. If more than one meter or a meter and an oscilloscope are used, connect each to the + S and - S terminals by a separate pair of leads to avoid mutual coupling effects.
Load Effect (Load Regulation). Constant-voltage load effect is the change in dc output voltage (Eo) resulting from a load-resistance change from open-circuit to full-load. Full-load is the resistance which draws the maximum rated output current at voltage Eo. Proceed as follows: a. Connect the test equipment as shown in Figure 2-5. Operate the load in constant resistance mode (Amps/Volt) and set resistance to maximum. b.
d. e. f. g. h. i. Turn up output voltage to: 20.0Vdc (6033A). 60.0Vdc (6038A). as read on the digital voltmeter. Reduce the resistance of the load to draw an output current of: 10Adc (6033A). 3.3Adc (6038A). Check that the unit's CV LED remains lighted. Adjust autotransformer to the minimum for your line voltage. Record the output voltage at the digital voltmeter. Adjust autotransformer to the maximum for your line voltage. When the reading settles record the output voltage again.
Figure 2-6. RMS Measurement Test Setup, CV PARD Test Figure 2-7.
a. b. c. d. e. Connect the test equipment as shown in Figure 2-7. Operate the load in constant resistance mode (Amps/Volt) and set resistance to maximum. Turn the unit's power on, and, using DISPLAY SETTINGS pushbutton switch, turn up current setting to full output. Turn up output voltage to: 7Vdc (6033A). 20Vdc (6038A). Turn up output current setting to full output and reduce the resistance of the load to draw an output current of: 29Adc (6033A). 10Adc (6038A).
. Figure 2-8. Load Transient Recovery Waveform Constant Current (CC) Tests CC Setup. Constant-current tests are analogous to constant-voltage tests, with the unit's output short circuited and the voltage set to full output to assure CC operation. Follow the general setup instructions of Page 20. Current Programming And Readback Accuracy. This procedure verifies that the current programming and readback functions are within specifications. A GPIB controller must be used for this test.
Load Effect (Load Regulation). Constant current load effect is the change in dc output current (Io) resulting from a load-resistance change from short-circuit to full-load, or full-load to short-circuit. Full-load is the resistance which develops the maximum rated output voltage at current Io. Proceed as follows: a. Connect the test equipment as shown in Figure 2-5. Operate the load in constant resistance mode (Amps/Volt) and set resistance to minimum. b.
29Adc (6033A). 10Adc (6038A). Check that the unit's CC LED remains lighted. d. Check that the rms noise current measured by the current probe and rms voltmeter is no more than: 15mA rms (6033A). 5mA rms (6038A). Initialization Procedure Follow the procedure if either the GPIB assembly has been replaced, or the EEPROM (U70) has been replaced: 1. Install the GPIB assembly in the unit. 2. Turn the power on and depending on your unit's model number, send string: "EEINIT 6033" or "EEINIT 6038''. 3.
3 Troubleshooting Maintenance described herein is performed with power supplied to the instrument, and protective covers removed. Such maintenance should be performed only by service-trained personnel who are aware of the hazards involved (for example, fire and electrical shock). Where maintenance can be performed without power applied, the power should be removed.
Electrostatic Protection The following caution outlines important precautions which should be observed when working with static sensitive components in the power supply. This instrument uses components which can be damaged by static charge. Most semiconductors can suffer serious performance degradation as a result of static charges, even though complete failure may not occur. The following precautions should be observed when handling static-sensitive devices. a. b. c. d. e. f.
When replacing any heatsink-mounted components except thermostat, smear a thin coating of heatsink compound between the component and heatsink. If a mica insulator is used, smear a thin coating of heatsink compound on both sides of the mica insulator. Do not use any heatsink compound containing silicone, which can migrate and foul electrical contacts elsewhere in the system. An organic zinc oxide cream, such as American Oil and Supply Company Heatsink Compound #100, is recommended.
A8 GPIB Board Removal Remove the A8 board as follows: a. Remove the two screws (Pozidriv, M3x.5) which attach the A8 GPIB board to the rear panel. Remove the single screw (Pozidriv, M4x.7) that secures the GPIB board to the side frame near the front corner. b. After removing the inside cover, unplug the W5 and W6 ribbon cables at the top edge of the A8 board, the W2 3-wire cable from connector A8J10 and the W1 ribbon cable from connector A8J9. c. Remove the A8 board lifting it straight up.
AC POWER WIRE from color F1 fuse wht/brn/gry FL1 line module white/gry PLUG ONTO TERMINAL desig. located L left-rear corner N right of above Plug the fan wires, ignoring color codes if any, onto the remaining pair of terminals. Overall Troubleshooting Procedure The overall troubleshooting procedure for the unit involves isolating the problem to one of several circuit blocks and troubleshooting the block individually.
Figure 3-1.
Figure 3-1.
Table 3-1.
Figure 3-3.
+5V and PCLR Circuits: Node U1-8 U1-2 U1-3 U1-4 U1-6 Measurement ≈ 3.5Vdc = 4Vdc = 4.2Vdc = 4.2Vdc ≈50mVdc Clock Signals (See clock waveforms in Figure 3-3) Node C7+,C8+ J5-8 U35-12 Measurement = 12MHz (See waveform) = 6MHz (See waveform) ≈ 50mVdc (See waveform) Source Y2 U14 U35 Data Lines Check that all data and address lines are toggling.
Use the front panel controls to vary the output voltage and current from zero to full-scale output. Remember to turn off the unit and connect a short across the output before programming the current from zero to full scale. Use a DMM and check the voltages at the following nodes: CV DAC Circuits Node U69-6 Setup Voltage set to 0. Voltage set to max. Measurement 0V + 5V U64-6 Voltage set to 0. Voltage set to max. 0V -10V CC DAC Circuits Node U68-6 Setup Current set to 0. Current set to max.
Figure 3-4.
Signature Analysis Perform the signature analysis only after you have completed the Primary Processor Troubleshooting. The easiest and most efficient method of troubleshooting microprocessor-based instruments is signature analysis. Signature analysis is similar to signal tracing with an oscilloscope in linear circuits. Part of the microcomputer memory is dedicated to signature analysis and a known bit stream is generated to stimulate as many nodes as possible within the circuit.
Return the J5 jumper to its normal position when the front panel signature analysis is complete. Secondary SA For secondary SA troubleshooting, connect the signature analyzer as shown in Table 3-3. Use a jumper wire and short U4 pin 21 to common (U4 pin 20). Check for the waveforms in Figure 3-4 and the signatures in Table 3-8 for the secondary SA. When the secondary signature analysis is complete, disconnect the jumper on U4 pin 21. Table 3-2.
Table 3-4. Primary Processor Signature Table (A8U6 = P/N 5080-2160 REV A.00.00, A.00.01, A.00.02 and A.00.04) A(0) A(1) A(2) A(3) A(4) A(5) A(6) A(7) A(8) A(9) A(10) A(11) A(12) A(13) A(14) A(15) A.00.04 A46A 4148 72F5 PAU8 A4A7 45OP C3UU HOU4 4U39 45A8 278A 6OA3 7826 5850 F93H 79UA A.00.02 A46A UH8O 82H5 9899 3088 48H5 UF3H HOU4 4U39 45A8 278A 6OA3 7826 5850 F93H 79UA A.00.01 A46A UH8O UO39 HOPF O7FA 5823 2682 F6OP 17AF 62H1 OOU3 6OA3 7826 5850 F93H 79UA A.00.
Table 3-5. Front Panel LED Display and Indicator Drivers (A8U6 = P/N 5080-2160 REV A.00.00, A.00.01, A.00.02 and A00.04 Inputs) Inputs: Node U1 to U10-1 U1 to U10-9 U1 to U10-2,14 U1 to U10-7 U1-8 U2-8 U3-8 U4-8 U5-8 U6-8 U7-8 U8-8 U9-8 U10-8 Measurement 6H15 Cycle power to unit--Lo to Hi after approx.
Table 3-6. Front Panel Address Latches and Decoders (A8U6 = P/N 5080-2160 REV A.00.00, A.00.01, A.00.02 and A.00.04 Inputs) Inputs: Node U14-26 U14-35 U14-38 Measurements Toggling (unstable) 37F8 1ABC U15-9, U17-3,6 U17-4,5 Cycle power to unit--Lo to Hi after approx. 160 rms Cycle power to unit--Hi to Lo after approx.
Table 3-7. Front Panel RPG Latches and Input Port (A8U6 = P/N 5080-2160 REV A.00.00, A.00.01 A.00.02, and A.00.
Table 3-8.
To troubleshoot the power supply the A4 power FET board and A2 control board can be raised out of the unit using extender boards and cables provided in service kit P/N 5060-2865. Main Troubleshooting Setup Figure 3-5 shows the troubleshooting setup for troubleshooting all of the unit except the front panel and initial no-output failures (See Page 49). The external power supply provides the unit's internal bus voltage.
An isolation transformer provides ac voltage that is not referenced to earth ground, thereby reducing the possibility of accidentally touching two points having high ac potential between them. Failure to use an isolation transformer as shown in Figure 3-5 will cause the ac mains voltage to be connected directly to many components and circuits within the power supply, including the FET heatsinks, as well as to the terminals of the external dc power supply.
Figure 3-6. Modified Mains Cord Set For Troubleshooting Power Section Blocks This section contains the blocks referenced in Tables 3-10 and 3-11.
Table 3-9. Control Board Test Connector, A2J7 PIN NO. SIGNAL NAME Digital-Circuits Bias & Reference Voltages 1 +5V 22 + 20V(5V UNREG) 14 2.5V ref 6 0.5V ref Analog-Circuits Bias Voltages 2 +15V 21 -15V Status Signals 17 CV 16 CC 13 OV 11 DROPOUT 12 OT Vdc 5.0 20.0 2.50 0.50 INHIBIT DOWN PROGRAM 7 OVP PROGRAM 5 OV CLEAR with 120Hz & 45KHz ripple 15.0 -15.
Table 3-10.
Troubleshooting AC-Turn-On Circuits Relay AlK1 closes at 1.0 seconds and DROPOUT goes high at 1.1 seconds after 20V (5V UNREG) reaches about 11Vdc. DROPOUT high enables the PWM if OVERVOLTAGE , INHIBIT , and OVERTEMP are also high. Circuits Included. AC-Surge-&-Dropout Detector, Bias Voltage Detector, U11A, 1-Second Delay and Relay Driver--all on A2 control board. Setup. The Main Troubleshooting Setup, Page 48. Apply the ac mains voltage to the bias transformer, and set the external supply to 0Vdc.
Inputs: NODE (+) A2J3-26(PWM-ON) A2J3-25(PWM-OFF) A4Q3-D NODE (-) VM VM A4Q4-S MEASUREMENT waveform #1 waveform #2 39Vdc NODE (-) A4Q3-S A4Q4-S A4Q3-S A4Q4-S A2J3-4 MEASUREMENT waveform #3 waveform #3 waveform #4 waveform #4 waveform #5 SOURCE A2Ul7-6,A2P1-7, A4P1-24,C A2U13-5,A2P1-13,A4P1-26,A A1C4 ( + ),A4P1-10,A,C A1C4 ( - ),A4P1-4,A,C Outputs: NODE (+) A4Q3-G A4Q4-G A4Q3-D A4Q4-D A2J3-18 Note: The Gate (G) and Source (S) leads of PFETs A4Q3 and A4Q4 can be accessed from the circuit side of the b
Outputs: NODE A2U6-6 A2U6-12,13 A2Q3 (emit) A2U5 (OUT) A2R50, A2CR11 (anode) A2R46, A2R47 MEASUREMENT ≈2 to 4Vdc sawtooth, 45KHz ≈ 19V pk, 15µs pulses, 45KHz ≈ 20V pk, 5µs pulses, 45KHz 2.5 Vdc ≈ 0 >V > 0.007Vdc 2.5 Vdc To check if load on + 5V is shorted, remove jumper A2W3 +15V On A2 Control Board. Voltage regulator A2U12 regulates the voltage across resistor A2R29 to be 1.25Vdc. That sets the current through zener diode A2VR1 at 7.5mAdc. The output voltage is 1.25Vdc plus 11.
Figure 3-7.
-15 V On A2 Control Board. Voltage regulator A2U4 regulates the voltage across resistor A2R32 to be 1.25Vdc. Circuit Included. -15 Vdc bias supply circuitry from connector pin A2P1-30 through test point A2J3-21 on A2 control board. Setup. The Main Troubleshooting Setup, Page 48. Apply the ac mains voltage to the bias transformer, and set the external supply to 0Vdc. Input: NODE (+) A2U4(IN), A2C16 (-) MEASUREMENT ≈ - 24Vdc SOURCE A1U1, A1C1(+) NODE (-) A2U24 (OUT) A2VR2 (anode) A2VR2 (cath.
Troubleshooting CV Circuit V-MON, the output of CV Monitor Amp A2U7 is the voltage between + S and - S. CV Error Amp A2U8 compares V-MON to CV PROGRAM. Innerloop Amp A2U10A stabilizes the CV loop with IVS input from A2U10C. The measurements below verify that the operational amplifier circuits provide expected positive and negative dc voltage excursion when the CV loop is open and the power mesh shut down. Circuits Included. Constant Voltage (CV) Circuit and buffer amplifier A2U10C. Setup.
If the failure symptoms include output current oscillation, check if the differentiator circuit is at fault by removing resistor A2R16. If oscillations stop, the differentiator is probably at fault. Troubleshooting OVP Circuit Comparator A2U14D sets, and gate A2U17A resets flipflop A2U14B-A2U14C. TTL low at A2U14-1,8,13 inhibits the PWM. Circuit included. OVP Circuit and 2.5V bias supply on A2 control board. Setup.
Inputs: NODE A2J3-1 A2U19-1 A2U19-2 A2U19-4 A2U19-5 A2U19-10 A2U19-12 A2U19-12 SETUP POWER LIMIT fully CCW POWER LIMIT fully CCW MEASUREMENT 5.0Vdc Hi Hi Hi Hi Hi Lo SOURCE A2Q3 (emitter) A2U17D-11 remote inhibit A2U14-1,8 A2U11B-6 A2U16-7 A2U14-2 Hi A2U14-2 Outputs: NODE A2U21-7 A2U22-3 A2U22-6 A2U13-5 A2U13-9 A2U14-2 SET VOLTAGE (Vdc) EXT. INT.
4 Principles of Operation Introduction This chapter contains block diagrams, simplified schematics, and related descriptions of the power supply. The instrument can be thought of as comprising two major sections: the GPIB, microcomputer, and interface circuitry; and the power mesh and control circuits. Block diagrams represent the GPIB board, the front panel board, and the power mesh and control board.
Figure 4-1.
EEPROM The primary microprocessor determines the power supply ID, start-up parameters, calibration constants and scale factors by reading the factory-initialized EEPROM. Isolation Two optical isolators transmit serial data between the primary and secondary microprocessors while maintaining electrical isolation between the controller/user-interface and the power mesh.
Front Panel Board The front-panel board, see Figure 4-2, contains the VOLTS and AMPS display circuits, the rotary pulse generator (RPG) and RPG decoders, five pushbutton switches, mode indicators, and the OVP ADJUST potentiometer. Data from the microprocessor is shifted to the display circuits via DATA DOWN , and data from the front-panel controls circuits is shifted to the microprocessor via DATA UP.
Figure 4-2.
Mode Indicators The front-panel mode indicators are controlled by the microprocessor via DATA DOWN and the mode indicator output ports and latches. DATA DOWN signals are shifted in by clock pulses from the address decoders. OVP Adjust Control The OVP ADJUST potentiometer sets the voltage level at which the overvoltage protection (OVP) circuit trips.
Figure 4-3. Output Characteristics; Typical, Dual Range, and Autoranging Supplies Figure 4-4.
AC Turn-On Circuits Primary power comes to the input rectifier through a resistor which limits turn-on inrush current to the input filter. Jumper A1W5 connects the input rectifier and filter as a voltage doubler for 100/120Vac power lines. This jumper is not used for 220/240Vac; thus the input filter develops a dc bus voltage of about 300Vdc for either 100/120 or 220/240Vac power line voltages.
the output line low. Five conditions can conditions can trigger down programming: programming of a lower output voltage, overvoltage, overtemperature, remote disable, or primary power failure. The Down Programmer turns on when either MASTER ENABLE is low or the CV ERROR VOLTAGE is more negative than about -6Vdc. The + 8.9Vdc bias supply for the Down Programmer stores enough energy in its input capacitor to operate the Down Programmer after loss of primary power.
Differentiation of IVS develops a current proportional voltage which senses the interloop current flowing into the capacitive output filter. CC error amplifier A2U2B sums this differentiated innerloop voltage with I-MON and compares the sum to the CC PROGRAM VOLTAGE to produce CC CONTROL VOLTAGE. In CC mode the CC CONTROL VOLTAGE varies between about -0.5 Vdc and about +1.0Vdc at the cathode of diode A2CR19. CC clamp A2U2A limits CC PROGRAM VOLTAGE to about 5.6 peak volts.
when no power is requested by the control circuits. To eliminate the delay, the initial-ramp circuit adds a ramp voltage to Ip-RAM VOLTAGE at the input to the control voltage comparator. The added ramp voltage starts with the 20KHz clock pulse and causes the combined-ramp voltage to exceed the control voltage earlier, thereby essentially eliminated the PFET turn-off delay.
5 Replaceable Parts Introduction This chapter contains information for ordering replacement parts. Table 5-3 lists parts in alpha-numeric order by reference designators and provides the following information: a. b. c. d. Reference Designators. Refer to Table 5-1. Agilent Technologies model in which the particular part is used. Agilent Technologies Part Number. Description. Refer to Table 5-2 for abbreviations.
Ordering Information To order a replacement part, address order or inquiry to your local Agilent Technologies sales office. Specify the following information for each part: Model, complete serial number, and any Option or special modification (J) numbers of the instrument; Agilent Technologies part number; circuit reference designator; and description. To order a part not listed in Table 5-3, give a complete description of the part, its function, and its location. Table 5-2.
Table 5-3. Replaceable Parts List Ref. Desig.
Table 5-3. Replaceable Parts List (continued) Ref. Desig.
Table 5-3. Replaceable Parts List (continued) Ref. Desig.
Table 5-3. Replaceable Parts List (continued) Ref. Desig.
Table 5-3. Replaceable Parts List (continued) Ref. Desig.
Table 5-3. Replaceable Parts List (continued) Ref. Desig.
Table 5-3. Replaceable Parts List (continued) Ref. Desig.
Table 5-3. Replaceable Parts List (continued) Ref. Desig.
Table 5-3. Replaceable Parts List (continued) Ref. Desig.
Table 5-3. Replaceable Parts List (continued) Ref. Desig.
Ref. Desig. A8 C1,4 C2,3 C5 C6 C7,8 C9 C10 C11,12 C13 C14 C15 C16 C22 C23 C24 C25,26 C27 C28-31 C32-37 C38 C39,40 C41,42 C43-47 C48 C49-51 C52 C53-58 C59,60 C61 C62,63 C64 C65 C66 C67-70 C71,73 C142 C143,144 D8,9 D13-17 D20,21 D22 F1,2 J1,2 J3 J4 J5 J6 J7,8 J9 J10 Table 5-3. Replaceable Parts List (continued) Agilent Model Agilent Part Number Description both 5063-3463 GPIB /PSI Board both 0160-5422 cap 0.047µF 20% 50V both 0160-4807 cap 33pF 5% 100V both 0160-4822 cap 1000pF 100V both 0180-0197 cap 2.
Ref. Desig. L1 L2-4 Q1, 4 R1 R2 R3 R4 R5 R6 R7 R8-11 R12 R14 R15-17 R18 R19 R20-22 R23 R24,26 R28 R29 R30 R32 R33 R34 R35 R36 R37 R39 R40 R41 R42 R43 R44 R45 R46 R48 R49 R50 R51 R52 R55,58 R59,60 R61 R62-64 R65 R66 R67 R68 R69 R70 R71 86 Table 5-3. Replaceable Parts List (continued) Agilent Model Agilent Part Number Description both 9170-1680 choke both 9170-1454 core-shield bead both 1853-0089 transistor 2N4917 both 0757-0457 res 47.5 1% 1/8W both 0698-3155 res 4.
Ref. Desig. R72 R73 R74 R75 R76 R78 R79,80 R82 R83-88 R89 R90,98,99 R101 R102 R103 R106 R109,110 R111 R112 S1 TB1 U1 U2 U4 U5 U6 U7 U8 U9,11 U12 U13 U14 U16 U19 U20 U24 U25 U28 U31 U32 U33 U35 U36 U37 U64-69 U70 U115 U116 U117 VR2 VR3,4 VR6,7,8 Y1,2 Table 5-3. Replaceable Parts List (continued) Agilent Model Agilent Part Number Description both 0757-0400 res 90.9 1% 1/8W both 0757-0451 res 24.3k 1% 1/8W both 0757-0199 res 21.
Table 5-3. Replaceable Parts List (continued) Ref. Desig.
6 Component Location and Circuit Diagrams This chapter contains component location diagrams, schematics, and other drawings useful for maintenance of the power supply. Included in this section are: a. b. c. Component location illustrations (Figures 6-1 through 6-6), showing the physical location and reference designators of almost all electrical parts. (Components located on the rear panel are easily identified.) Notes (Table 6-1) that apply to all schematic diagrams.
Table 6-1. Schematic Diagram Notes (continued) 10. For single in-line resistor packages, pin 1 is marked with a dot. For integrated circuit packages, pin 1 is either marked with a dot, or pin 1 is to the left (as viewed from top) of indentation on the integrated circuit package (except for A8U6 and A8U8).
Figure 6-1.
Figure 6-2.
Figure 6-3.
Figure 6-4.
Figure 6-5.
Figure 6-6.
Figure 6-9A.
Figure 6-9B.
A l00 Vac Input Power Option 100 General Information Description Option 100 is a modification of Agilent 6033A/6038A power supplies that involves changing a resistor in the A2 OVP circuit, recalibrating the supply, and changing the Front Panel. These changes allow the units to operate at a lower line voltage of 87 to 106 Vac, while operating on the same line frequency of 48 to 63 Hz.
On Page 17, in Voltage Monitor and Remote Readback Full Scale Calibration step c, change 5.000625V to 4.250625V ±100µV (6033A). change 5.000625V to 4.168125V ±80µV (6038A). On Page 17, in Voltage Monitor and Remote Readback Full Scale Calibration step f, change 20V and 20.005V to 17.000 and 17.005V (6033A). change 60V and 60.015V to 50.025V and 50.01V (6038A). On Page 19, in Power Limit Calibration step d, change 10A to 9.2A (6033A) On Page 19, in Power Limit Calibration step e, change ISET 30.5 to ISET 27.
On Page 26, in Current Programming and Readback Accuracy steps c and g, change 20V to 17V (6033A). change 60V to 50V (6038A). On Page 27 in Load Effect (Load Regulation) steps c, change 10A to 9A (6033A). On Page 27 in Load Effect (Load Regulation) steps d, change 20V to 17V (6033A). change 60V to 50V (6038A). On Page 27, in Source Effect (Line Regulation) step d, change 30A to 25A (6033A). On Page 27, in Source Effect (Line Regulation) step e, change 7.0 to 6.25V (6033A). change 20.0 to 15.0V (6038A).
On page 68, change 200W to 150W. Chapter 5 and 6 Manual Changes On Page 76, change A2 board from 06023-60023 to 06023-60123 (6033A). change A2 board from 06038-60023 to 06038-60024 (6038A). On Page 80, change R78 from 475 to 1.43K, Agilent P/N 0698-3225 (6033A). change R78 from 787 to 1.96K, Agilent P/N 0698-0083 (6038A). Make these same changes on the schematic diagram, Figure 6-7. On Page 82, add Option 100 label (A2 board) 9320-5540.
B Blank Front Panel Option 001 Introduction This appendix describes the blank front panel option (Option 001) for the power supply. Option 001 is designed for applications in which front panel operation and monitoring are unnecessary. It has no front-panel controls and indicators except for the LINE switch and OVP ADJUST control found on the standard unit, and a pilot light to indicate when ac input power is turned on. All other characteristics of the standard are retained.
Chapter 3 Manual Changes: Replace Figure 3-1 with the figure on the next page. SA Tables 3-5 through 3-7 do not apply to Option 001 units. Chapter 5 and 6 Manual Changes: On Page 83 under A3 Front Panel Board, the only part that applies to the Option 001 unit is R59, the OVP-adjust potentiometer. Change R59 from 2100-1775 to 2100-4060. On Page 86 under Chassis Electrical, add Neon Pilot Light, P/N 1450-0647. Also add OVP Cable (R59), P/N 06032-60004.
Figure 3-1.
C Agilent 6033A Test Record Performance Test Record - Agilent 6033A POWER SUPPLY (Page 1 of 2) Test Facility: __________________________________________ __________________________________________ __________________________________________ __________________________________________ Report No.
Performance Test Record - Agilent 6033A POWER SUPPLY (Page 2 of 2) MODEL Agilent 6033A Page No. 21 Test Description Report No.______________ Minimum Spec. Results * Constant Voltage Tests Date_____________________ Maximum Spec. Measurement Uncertainty Voltage Programming and Readback Low Voltage (0.100V) Front Panel Display GPIB Readback 0.091 VOUT - 0.011 VOUT - 0.006 ________V ________V ________V 0.109 VOUT + 0.011 VOUT + 0.006 3µV 3µV 3µV High Voltage (20.
D Agilent 6038A Test Record Performance Test Record - Agilent 6038A POWER SUPPLY (Page 1 of 2) Test Facility: __________________________________________ __________________________________________ __________________________________________ __________________________________________ Report No.
Performance Test Record - Agilent 6038A POWER SUPPLY (Page 2 of 2) MODEL Agilent 6038A Page No. 21 Test Description Report No.______________ Minimum Spec. Results * Constant Voltage Tests Date_____________________ Maximum Spec. Measurement Uncertainty Voltage Programming and Readback Low Voltage (0.090V) Front Panel Display GPIB Readback 0.050 VOUT - 0.050 VOUT - 0.050 ________V ________V ________V 0.130 VOUT + 0.050 VOUT + 0.050 3µV 3µV 3µV High Voltage (60.
E Manual Backdating This section describes changes that must be made to the manual so that it applies to instruments with serial numbers lower than those listed on the title page. Look in the following table for the serial number of your instrument, and make only those changes listed for your instrument. Note that for some changes you may be instructed to update the instrument if certain components are being replaced during repair.
