SERVICE MANUAL AUTORANGING SYSTEM DC POWER SUPPLY AGILENT MODELS 6030A, 6031A, 6032A and 6035A FOR INSTRUMENTS WITH SERIAL NUMBERS Agilent Model 6030A; Serials US38320301 and above Agilent Model 6031A; Serials US38310376 and above Agilent Model 6032A; Serials US38321026 and above Agilent Model 6035A; Serials US38320281 and above For instruments with higher serial numbers, a change page may be included. Agilent Part No. 5959-3344 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 ........................................................................................
Secondary Interface Troubleshooting ................................................................................................................................. 41 Voltage and Current DAC............................................................................................................................................... 41 Readback DAC Circuits..................................................................................................................................................
l00 Vac Input Power Option 100 ....................................................................................................................................... 119 General Information.......................................................................................................................................................... 119 Description........................................................................................................................................................
1 Introduction Scope This manual contains information for troubleshooting the Agilent 6030A, 6031A, 6032A, or 6035A 1000 W 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 (P/N 5959-3301). Both manuals cover Agilent Models 6030A/31A/32A/35A; 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.
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 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. Voltage Monitor Zero Calibration a. b. c. d. Send string "VSET 0; ISET 0; OUT OFF". Short power supply output terminals.
g. h. Adjust A8R51 (READBACK ZERO) until the value displayed on the controller toggles between: 0 and 50mV (6030A) 0 and 5mV (6031A) 0 and 15mV (6032A) 0 and 125mV (6035A) After adjusting A8R51 you must continue the calibration procedure through to the completion of Constant Voltage Zero Calibration. Remember to disconnect the external power supply and resistor. Figure 2-1. Common Mode Setup Figure 2-2.
Constant Voltage Full Scale Calibration Note: a. b. c. d. e. Perform this procedure only after completing Remote Readback Zero Calibration. Remove all external test circuits. Send string: "VSET 200; ISET 5; OUT ON" (6030A) ''VSET 20; ISET 5; OUT ON" (6031A) "VSET 60; ISET 5; OUT ON" (6032A) "VSET 500; ISET 5; OUT ON" (6035A) Attach the DVM from - S to + S terminals on rear panel. Adjust A8R58 (CV PROG F.S.) to: 200.025 ±6mV (6030A) 20.0025 ±0.6mV (6031A) 60.0075 ±1.82mV (6032A) 500.
Constant Voltage Zero Calibration Note: a. b. c. d. Perform this procedure only after completing Voltage Monitor and Remote Readback Full Scale Calibration. Send string "VSET 0; ISET 5; OUT ON". Connect an external supply to the power supply as shown in Figure 2-2. Attach the DVM from - S to + S on the rear panel. Adjust A8R40 (CV PROG ZERO) to 0 ±120µV. Current Monitor Zero Calibration a. b. c. d. e. Send string "VSET 0; ISET 0; OUT OFF''. Connect a short across power supply output terminals.
Current Monitor Full Scale Calibration Note: a. b. c. d. e. f. This procedure requires that I-MON ZERO (A2R8) be adjusted within specifications. If it is not, perform the Current Monitor Zero Calibration before proceeding. Connect Rm current-monitoring shunt: (1milliohm, 6031A) (10 milliohm, 6030A, 6032A) (100 milliohm, 6035A) 0.05% or better across power supply output terminals.
Power Limit Calibration Note: a. This procedure requires that CC PROG F. S. (A8R55) be adjusted within specifications. If it is not, perform Constant Current Full Scale Calibration before proceeding. Connect the power supply to the ac power line through a variable autotransformer. Connect a DVM across the input power rails, with the + lead to the rear of A1R3 and the - lead to the rear of A1R1. Adjust the autotransformer for 240Vdc on the input power rail.
i. Adjust A2R26 (UPPER KNEE) clockwise until front panel CV LED turns on. Power supply output should be: 200 ±0.4V @5.25A in CV mode (6030A) 20.5 ±0.5V @55A in CV mode (6031A) 60 ±0.4V @18.2A in CV mode (6032A) 500 ±0.4V @2.2A in CV mode (6035A) Resistance Programming Full Scale Calibration a. b. c. Send string ''OUT OFF". Connect a 2K ohm calibration resistor from P to VP on rear panel. Set rear-panel MODE switches for resistance programming: d. e. f. Attach the DVM from P to VP on the rear panel.
You may substitute: 3.5Ω 1000W load resistor (6030A) 0.069Ω 1000W load resistor (6031A) 0.4Ω 1000W load resistor (6032A) 40Ω 1000W load resistor (6035A) in these tests: CV Load Effect (Load Regulation) CV PARD (Ripple and Noise) CC Source Effect (Line Regulation) CC PARD (Ripple and Noise) The substitution of the load resistor requires adding a load switch and making minor changes to the procedures. The load transient recovery time test procedure is not amenable to modification for use with load resistors.
''VSET 0.1; ISET 120'' (6031A) ''VSET 0.09; ISET 50" (6032A) ''VSET 1.0; ISET 5'' (6035A) d. The DVM reading should be in the range: 0.354 to 0.645Vdc (6030A) 0.085 to 0.115Vdc (6031A) 0.050 to 0.130Vdc (6032A) 0.598 to 1.400Vdc (6035A) Note the reading. e. Enter and run the following program: 10 OUTPUT 705; "VOUT?" 20 ENTER 705;A 30 DISP A 40 GOTO 10 50 END f. The value displayed by the controller should be the value noted in step d: ± 0.080Vdc (6030A) ± 0.007Vdc (6031A) ± 0.020 Vdc (6032A) ± 0.
Figure 2-5. Basic Test Setup d. e. f. g. h. Reduce the resistance of the load to draw an output current of: 17.0Adc (6030A) 120Adc (6031A) 50 Adc (6032A) 5.0 Adc (6035A) Check that the unit's CV LED remains lighted. Open-circuit the load. Record the output voltage at the digital voltmeter. Reconnect the load. When the reading settles, record the output voltage again. Check that the two recorded readings differ no more than: ± 0.011Vdc (6030A) ± 0.0037Vdc (6031A) ± 0.007 Vdc (6032A) ± 0.
e. f. g. h. i. Reduce the resistance of the load to draw an output current of: 5.0Adc (6030A) 50 Adc (6031A) 16.5 Adc (6032A) 2.0 Adc (6035A) 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. Check that the two recorded readings differ no more than: ± 0.011Vdc (6030A) ± 0.
Figure 2-6. RMS Measurement Test Setup, CV PARD Test Peak Measurement Procedure. Figure 2-7 shows the interconnections of equipment to measure PARD in Vpp. The equipment grounding and power connection instructions of Paragraph 2-36 apply to this setup also. Connect the oscilloscope to the + S and - S terminals through 0.01µF blocking capacitors to protect the oscilloscope's input from the unit's output voltage.
Figure 2-7. Peak-To-Peak Measurement Test Setup, CV PARD Test Load Transient Recovery Time. Specified for CV operation only; load transient recovery time is the time for the output voltage to return to within a specified band around its set voltage following a step change in load. Use the equipment setup of Figure 2-5 to display output voltage transients while switching the load between 10% with the output set at: 60Vdc (6030A) 7Vdc (6031A) 20Vdc (6032A) 200Vdc (6035A) Proceed as follows: a. b. c. d. e.
. Figure 2-8. Load Transient Recovery Waveform g. Check that the amplitude of the transient pulse at 1 ms is no more than: 150mV/2ms (6030A) 100mV/2ms (6031A) 100mV/2ms (6032A) 200mV/5ms (6035A) 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 Pages 21 and 22. Current Programming And Readback Accuracy.
g. h. i. j. Send string: "VSET 200; ISET 17" (6030A) ''VSET 20; ISET 120" (6031A) ''VSET 60; ISET 50" (6032A) ''VSET 500; ISET 5" (6035A) Check that the voltage across Rm is in the range: 169.72 to 170.28mV (6030A) 119.4 to 120.55mV (6031A) 498.1 to 501.8 mV (6032A) 490 to 510 mV (6035A) Note the reading. Run the program listed in step e. The value displayed by the controller should be the actual output current: ± 76mA (6030A) ± 580mA (6031A) ± 215mA (6032A) ± 75mA (6035A) Load Effect (Load Regulation).
d. e. f. g. h. i. Turn up output current to: 17.0Adc (6030A) 120Adc (6031A) 50Adc (6032A) 5.0 Adc (6035A) Increase the load resistance until the output voltage between + S and - S decreases to: 60Vdc (6030A) 7.0Vdc (6031A) 20.0Vdc (6032A) 200 Vdc (6035A) Check that the CC LED is still on. Adjust autotransformer to the minimum for your line voltage. Record the voltage across Rm. Adjust autotransformer to the maximum for your line voltage. When the reading settles record the voltage across Rm again.
Figure 2-9. CC PARD Test Setup 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 6030" "EEINIT 6031'' "EEINlT 6032" or ''EEINIT 6035" 3. Turn the power off, wait 5 seconds, then turn the power back on. 4. If the GPIB assembly has been replaced, calibrate the unit.
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.
When installing the A4 power mesh board, lower it vertically, placing its tab into the A1 board slot, align the connector and press in place. A5 Diode Board Removal After removing the cover, remove the A5 Diode board by first removing the two screws (Pozidriv) that hold heatsinks to the A1 board, then lift vertically to remove the A5 board from the connector.
AC Input Wire from L6 (chassis) RFI filter Circuit breaker L6 (chassis) c. d.
Figure 3-1.
Figure 3-1.
To remove the GPIB board, perform the GPIB board removal procedure discussed earlier in this section. Lay out the board as shown in Figure 3-2 with a piece of insulating material under the board. Reconnect connectors W1, W2, W5, and W6 after the board is on the insulating material. Note: The GPIB board can be placed alongside the unit for troubleshooting by using extender cables provided in service kit Agilent P/N 06033-60005. Table 3-1.
+5V and PCLR Circuits: Node U1-8 U1-2 U1-3 U1-4 U1-6 Measurement ≈ 3.5Vdc = 4 Vdc = 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.
Figure 3-3.
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 ms 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.
The A4 FET Board should only be raised on an extender when using the main troubleshooting setup. NEVER use a FET Board extender when the unit is operated with its normal ( ≈ 320Vdc) bus voltage. To do so is a personal shock hazard and can damage the power supply. 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.
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.
AlR1, AlR3, and AlU1 connect to the ac mains voltage. Use a voltmeter with both input terminals floating to measure the rail voltage. a. Select the functional circuit for troubleshooting based on your measurements and Table 3-11, which provides direction based on the status of the PWM OFF and PWM ON signals. 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 24 +5V 22 + 20V(5V UNREG) 14 2.5V ref 6 0.5V ref Analog-Circuits Bias Voltages 2 + 15V 21 -15V Vdc 5.0 20.0 2.50 0.50 WAVEFORM/CONDITIONS with 120Hz & 45KHz ripple 15.0 -15.
Table 3-10.
Troubleshooting AC-Turn-On Circuits Relay AlK1 closes at 2.5 seconds and AC FAULT goes high at 2.9 seconds after 21V UNREG reaches about 13Vdc. AC FAULT high enables the PWM if OVERVOLTAGE , INHIBIT , and OVERTEMP are also high. Circuits Included. High AC and AC Dropout Detectors, Bias Voltage Detector, Q11A, 3-Second Delay and Relay Driver-all on A2 control board. Setup. The Main Troubleshooting Setup, Page 53. Apply the ac mains voltage to the isolation transformer, and set the external supply to 0Vdc.
Inputs: NODE (+) A2J7-26(PWM-ON) A2J7-25(PWM-OFF) NODE (-) M M MEASUREMENT 1.7µs, 20KHz pulse(see Waveform #1) 10µs, 20KHz pulse(see Waveform #2) SOURCE A2Ul5-l,A2J5 11, A4P1-A3 A2U16-5,A2J5-13,A4P1-A2 NODE (+) A4P1-C1 A4Q2-D NODE (-) A4P1-A1 A4Q4-S MEASUREMENT 10.
Figure 3-7.
+15V On A2 Control Board. Voltage regulator A2U11 regulates the voltage across resistor A2R99 to be 1.25Vdc. That sets the current through zener diode A2VR3 at 7.5mAdc. The output voltage is 1.25Vdc plus 11.7Vdc across A2VR3 plus the voltage across A2R100. Circuit Included. +15Vdc bias supply circuitry from connector pin A2J5-5 through test point A2J7-2 on A2 control board. Setup. The Main Troubleshooting Setup, Page 53.
Troubleshooting Down Programmer The down programmer discharges the output when either PWM OFF is generated or CV ERROR is more negative than about - 3Vdc. Comparator A5U1 triggers down programming when the voltage at A5U1-5 is less than about 4Vdc. Circuit Included. Down programmer and 10.6V bias supply on A1 main board. Setup. The Main Troubleshooting Setup, Page 53, except connect the external supply to the unit's + OUT ( + ) and - OUT ( - ) terminals.
Outputs: NODE ( + ) VM A2U5-1 A2U3-6 A2U5-1 A2U3-6 A2U5-7 NODE (-) A2J7-4 " " " " " SETUP VP = 0 VP = 0 VP = 5 VP = 5 short A2J7-24 to A2U5-5 MEASUREMENT 3.75Vdc -14Vdc -14Vdc 4.7Vdc 5.1Vdc + 7.5Vdc If the failure symptoms include output voltage oscillation, check if the CV Error Amp circuit is at fault by shorting A2U3-6 to A2U3-2. If oscillations stop, the CV Error Amp circuit is probably at fault.
Setup. The Main Troubleshooting Setup, Page 53, except connect the external supply to the unit's + OUT ( + ) and - OUT (-) terminals. Apply the ac mains voltage to the isolation transformer. Adjust the unit's OVP limit to 10Vdc. Set the external supply (EXTERNAL) as instructed below. Outputs: NODE ( - ) = A2J7-4 SET VOLTAGE EXTERNAL (Vdc) - NODE ( + ) A2U7-2 A2J7-7 A2J7-5 A2J7-13 A2J7-13 A2J7-13 A2J7-13 Note: 5 15 5 5 SETUP cycle power MEASUREMENT 2.5Vdc 0.1V (6030A) 1.0V (6031A) 0.33V (6032A) 0.
Outputs: NODE ( + ) A2U20-1 A2U20-5 A2U20-6 A2U19-5 A2U19-6 A2U16-5 A2U16-5 A2U16-4 A2U16-4 A2U15-1 A2U15-1 +OUT +OUT 64 SET VOLTAGE (Vdc) EXTERNAL INTERNAL 0 0 0 0 0 0 0 2 0 2 40 2 40 0 40 20 40 0 40 20 40 0 40 20 40 2 MEASUREMENT TTL sq wave, 320KHz TTL sq wave, 40KHz TTL sq wave, 20KHz 20KHz 20KHz 10µs pulse, 20KHz Lo 48µs pulse, 20KHz hi 1.7µs pulse, 20KHz Lo ┐ ≈ 40Vdc (6030A) │ ≈ 8Vdc (6031A) ├ ≈ 14Vdc (6032A) │ ≈ 80Vdc (6035A) ┘ 2.
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. FET Control Signals Timing Diagram Power Mesh Figure 4-5 is a block diagram of the power mesh. These circuits convert the ac input power to approximately 320Vdc, and convert this dc voltage to the proper dc output voltage.
Input Circuits. Primary power is connected through the AC Input Filter to the LINE switch and to the normally open contacts of the Inrush-Limit relay. When LINE switch is closed, current flows through the inrush current limiting resistor and the normally closed relay contacts to the Bridge Rectifier/Voltage Doubler. This circuit is jumper connected as a voltage doubler for 100 or 115Vac operation and as a full-wave bridge charges to about 320Vdc for any input voltage.
Control Board Figure 4-6 is a block diagram of the control board. These circuits monitor the power supply operation and provide the signals that control the power mesh. + 5V Bias Supply. This circuit operates from the + 5V Unregulated voltage from the main board, and generates + 5V and + 2.5V used by circuits on the control board. Regulated + 5V is also supplied back to the main board for use by the relay circuits, FET Drivers, and Down Programmer.
Constant Current (CC) Circuit. The Constant Current Circuit compares the CURRENT SENSE voltage level to CC PROGRAMMING VOLTAGE to produce CC CONTROL SIGNAL. CURRENT SENSE is developed across the current-monitor resistor on the main board, and is proportional to the power supply output current. CC PROGRAMMING VOLTAGE comes from one of a number of sources as selected by the rear-panel mode switches, and represents the desired output current or current limit.
Control Voltage Comparator. This circuit compares the voltage at the CONTROL PORT (represents power required at output) with PRIMARY CURRENT RAMP voltage (represents energy being stored for transfer to output). When RAMP voltage exceeds CONTROL PORT voltage, the Control Voltage Comparator generates the CONTROL LIMIT signal to turn the PWM off. The CONTROL PORT is biased to approximately + 1.3 volts.
Figure 4-5.
Figure 4-6.
5 Replaceable Parts Introduction This chapter contains information for ordering replacement parts. Table 5-1 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 5-4, give a complete description of the part, its function, and its location. Table 5-2.
Table 5-3. Replaceable Parts List Ref.
Table 5-3. Replaceable Parts List (continued) Ref.
Table 5-3. Replaceable Parts List (continued) Ref.
Table 5-3. Replaceable Parts List (continued) Ref.
Table 5-3. Replaceable Parts List (continued) Ref.
Table 5-3. Replaceable Parts List (continued) Ref.
Table 5-3. Replaceable Parts List (continued) Ref.
Table 5-3. Replaceable Parts List (continued) Ref.
Table 5-3. Replaceable Parts List (continued) Ref.
Table 5-3. Replaceable Parts List (continued) Ref.
Table 5-3. Replaceable Parts List (continued) Ref.
Table 5-3. Replaceable Parts List (continued) Ref.
Table 5-3. Replaceable Parts List (continued) Ref.
Table 5-3. Replaceable Parts List (continued) Ref.
Table 5-3. Replaceable Parts List (continued) Ref.
Table 5-3. Replaceable Parts List (continued) Ref.
Table 5-3. Replaceable Parts List (continued) Ref.
Table 5-3. Replaceable Parts List (continued) Ref.
Table 5-3. Replaceable Parts List (continued) Ref. Desig U115 U116 U117 VR2 VR3,4 VR6,7,8 Y1,2 Agilent Model all all all all all all all all all Agilent Part Number 1820-6045 1820-6170 1821-1740 1902-3172 1902-0049 1902-0766 0410-2109 Description IC SN75ALS61610 IC SN75ALS6160 IC 9914 talker/listener diode, zener 11V diode, zener 6.19V diode, zener 18.
Table 5-3. Replaceable Parts List (continued) Ref.
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 6-9), 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) 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 6-2A.
Figure 6-2B.
Figure 6-2C.
Figure 6-3. Control Board (A2) Component Location Figure 6-4.
Figure 6-5.
Figure 6-6A. 6030A/35A Diode Board (A5) Component Location Figure 6-6B.
Figure 6-6C. 6032A Diode Board (A5) Component Location Figure 6-7.
Figure 6-8.
Figure 6-9.
Figure 6-13A.
Figure 6-13B.
A l00 Vac Input Power Option 100 General Information Description Option 100 is a modification of Agilent 6030A/31A/32A/35A power supplies that involves changing resistors on the A2 board, 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. The reduced input voltage limits the output power to approximately 700 watts.
On Page 17, in Voltage Monitor and Remote Readback Full Scale Calibration step d, change the A8R58 adjustment to: 170.025 ±6mV (6032A) 50.0075 ± 1.52mV (6032A) 425.063 ± 6µV (6035A) On Page 17, in Voltage Monitor and Remote Readback Full Scale Calibration step c, change 5.000625V to: 4.250625V ± 100µV (6030A/35A) 4.167187V ± 100µV (6032A) On Page 17, in Voltage Monitor and Remote Readback Full Scale Calibration step f, change the A8R61 adjustment to between: 170.00 and 170.50Vdc (6030A) 50.00 and 50.
On Page 21, in Electronic load, make the following resistor changes: from 40 to 36 ohms (6030A) from 0.4 to 0.57 ohms (6031A) from 3.5 to 3 ohms (6032A) from 250 to 300 ohms (6035A) from 3.5 to 2.4 ohms (6030A) from 0.069 to 0.043 ohms (6031A) from 0.4 to 0.
On Pages 25-27, in RMS Measurement Procedure, Peak Measurement and Load Transient Recovery Time, change the output voltage to 42Vdc (6030A) 5.2Vdc (6031A) 13.5Vdc (6032A) 150Vdc (6035A) On Page 28 and 29, in paragraph Current Programming and Readback Accuracy steps c and g, change the VSET values to: VSET 170 (6030A) VSET 50 (6032A) VSET 425 (6035A) On Page 29, in Load Effect (Load Regulation) step c, change the output current to: 4.7Adc (6030A) 35Adc (6032A) 16Adc (6035A) 1.
Chapter 3 Manual Changes: On Page 45, in Readback Multiplexer (U20), change Node U20-9, Measurement from + 5V to: + 4.25V (6030A/31A/35A) + 4.167V (6032A) On Page 53 in Main Troubleshooting and on Page 54 in Troubleshooting No-Out Failures step d, change 320Vdc to 250Vdc. Chapter 4 Manual Changes: On Page 74 In Power Mesh and Input Circuits, change 320Vdc to 250Vdc.
B Blank Front Panel Option 001 Introduction This appendix describes the blank front panel option (Option 001) for the Agilent 6030A/31A/32A power supplies. 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 94 under A3 Front Panel Board, the only part that applies to the Option 001 unit is R72, the OVP-adjust potentiometer. Change R72 from 2100-1775 to 2100-4060. On Page 102 under Chassis Electrical, add Neon Pilot Light, P/N 1450-0647. Also add OVP Cable (R72), P/N 0603260004.
Figure 3-1.
C Agilent 6030A Test Record Performance Test Record - Agilent 6030A POWER SUPPLY (Page 1 of 2) Test Facility: __________________________________________ __________________________________________ __________________________________________ __________________________________________ Report No.
Performance Test Record - Agilent 6030A POWER SUPPLY (Page 2 of 2) MODEL Agilent 6030A Page No. 23 Test Description Report No.______________ Minimum Spec. Results * Constant Voltage Tests Date_____________________ Maximum Spec. Measurement Uncertainty Voltage Programming and Readback Low Voltage (0.500V) Front Panel Display GPIB Readback 0.354 VOUT - 0.065 VOUT - 0.080 ________V ________V ________V 0.645 VOUT + 0.065 VOUT + 0.
D Agilent 6031A Test Record Performance Test Record - Agilent 6031A POWER SUPPLY (Page 1 of 2) Test Facility: __________________________________________ __________________________________________ __________________________________________ __________________________________________ Report No.
Performance Test Record - Agilent 6031A POWER SUPPLY (Page 2 of 2) MODEL Agilent 6031A Page No. 23 Test Description Report No.______________ Minimum Spec. Results * Constant Voltage Tests Date_____________________ Maximum Spec. Measurement Uncertainty Voltage Programming and Readback Low Voltage (0.10V) Front Panel Display GPIB Readback 0.085 VOUT - 0.007 VOUT - 0.007 ________V ________V ________V 0.115 VOUT + 0.007 VOUT + 0.007 3µV 3µV 3µV High Voltage (20.
E Agilent 6032A Test Record Performance Test Record - Agilent 6032A POWER SUPPLY (Page 1 of 2) Test Facility: __________________________________________ __________________________________________ __________________________________________ __________________________________________ Report No.
Performance Test Record - Agilent 6032A POWER SUPPLY (Page 2 of 2) MODEL Agilent 6032A Page No. Test Description Report No.______________ Minimum Spec. Results * Date_____________________ Maximum Spec. Measurement Uncertainty Constant Voltage Tests 23 Voltage Programming and Readback Low Voltage (0.090V) Front Panel Display GPIB Readback 0.050 VOUT - 0.020 VOUT - 0.020 ________V ________V ________V 0.130 VOUT + 0.020 VOUT + 0.020 3µV 3µV 3µV High Voltage (60.
F Agilent 6035A Test Record Performance Test Record - Agilent 6035A POWER SUPPLY (Page 1 of 2) Test Facility: __________________________________________ __________________________________________ __________________________________________ __________________________________________ Report No.
Performance Test Record - Agilent 6035A POWER SUPPLY (Page 2 of 2) MODEL Agilent 6035A Page No. 23 Test Description Report No.______________ Minimum Spec. Results * Constant Voltage Tests Date_____________________ Maximum Spec. Measurement Uncertainty Voltage Programming and Readback Low Voltage (1.00V) Front Panel Display GPIB Readback 0.598 VOUT - 0.300 VOUT - 0.205 ________V ________V ________V 1.400 VOUT + 0.300 VOUT + 0.
G 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.
CHANGE 1: Under A1 Main Board, change R45 to 82.5k p/n 07570563. CHANGE 8: Under A1 Main Board, change K1, K2 to p/n 0490-1746. Change R47 and R48 150 ohms p/n 0761-0035. CHANGE 2: Under A8 GPIB Board. Add: R100 p/n 0698-4037. U17 p/n 1820-2549 Delete: C67-70 0.01uF 10%, p/n 0160-4832, qty 4. C71,73 2200pF 10%, p/n 0160-4830, qty 2. L1 choke, p/n 9170-1680. L2-4 core-shield bead, p/n 9170-1454, qty 3. : Q1 transistor 2N4917, p/n 1853-0089. R1 47.5K 1%, p/n 0757-0457. R2,12 4.64K 1%, p/n 0698-3155, qty 2.
CHANGE 12: Under A1 Main Board, *********** For Model 6031A only *********** Change C23 and C28 to .047uF Agilent p/n 01605895. Add C21 and C24, .047uF Agilent p/n 0160-5895. Add R21 and R22, 1 ohm p/n 0699-0208. *********** For Model 6032A only *********** Change C20 and C22 to .047uF Agilent p/n 01605895. Add C21 and C23, .047uF Agilent p/n 0160-5895. Add R20 and R23, 1 ohm p/n 0699-0208. CHANGE 13: Under A8 GPIB Board, change U8 to p/n 1818-4111. CHANGE 14: Under A1 Main Board, change C11,12 to 0.
Manual Updates The following updates have been made to this manual since the print revision indicated on the title page. 4/07/04 Pages 38, 104, 105, 106 and 107 have been corrected.