Page 2 - Service Addendum; Table of Contents
Service Addendum 2 Table of Contents Addendum A - SERVICE MANUAL ................................................................................................................................1 Foreword ...................................................................................................
Page 3 - Chapter 1 Differences; Firmware Revisions; Chapter 2 Differences; Test Equipment Required; Table 2-2. Test Equipment Required for Verification
Service Addendum 3 Chapter 1 Differences Firmware Revisions The Agilent E4350B/E4351B SAS firmware resides in the front panel board’s ROM chip (A3U4), the GPIBboard’s ROM chip (A2U106), and in the DSP board’s ROM chips (A5U734 and A5U735).Use the *IDN query as described in chapter 3 of the Service M...
Page 4 - Measurement Techniques; All tests are performed in the FIXED as shown in Figure 2-1.; Basic Test Setup
Service Addendum 4 Measurement Techniques Note All tests are performed in the FIXED as shown in Figure 2-1. • Measure the DC voltage directly at the +S and -S terminals. • Set the SENSE switch at the back of the supply to the Remote position. • Connect the remote sensing leads from +OUT to +S, and f...
Page 5 - Voltage and Current Values; This test does not need to be performed on the Agilent E4350B.; CC RMS Noise Measurement Test Setup; Figure 2-3. CC RMS Noise Measurement Test Setup; VOLTMETER
Service Addendum 5 Voltage and Current Values Table 2-3. Voltage and Current Values Agilent Model Full-scale Voltage Max. Prog. Voltage Full-scale Current Max. Prog. Current Max. Prog. Overvoltage E4350B 60V 61.5V 8A 8.16A 73.0V E4351B 120V 123V 4A 4.08A 140V Transient Recovery Time This test does n...
Page 6 - Performance Test Record; Readback Accuracy
Service Addendum 6 Performance Test Record Table 2-15A. Performance Test Record for Agilent Model E4350B Agilent E4350B Report No.______________ Date _________________ Test Description Minimum Spec. Result * Maximum Spec. Measurement Uncertainty Constant Voltage Tests Voltage Programming andReadback...
Page 8 - Chapter 3 Differences; Signature Analysis
Service Addendum 8 Chapter 3 Differences Signature Analysis Signature analysis (SA) troubleshooting for the secondary circuits on the A1main circuit board is ++NOT++ available for the Agilent E4350B unit. However,GPIB and front panel signature analysis is available as describedin chapter 3 of the Se...
Page 12 - Overall Troubleshooting – sheet 4
Service Addendum 12 Overall Troubleshooting – sheet 4 Figure 3-2. Overall Troubleshooting (sheet 4 of 5) Calibrate the supply. See Appendix A in the Operating manual. Output voltage approx. right but outside spec ? C From Sheet 2 B From Sheet 1 PROT annumciator on ? Output current approx. right but ...
Page 14 - No Display Troubleshooting
Service Addendum 14 No Display Troubleshooting "No Display" Start Turn on the supply and try to program it from thefront panel. While measuring the voltage at theoutput terminals, program the voltage and current tofull scale. Toggle the ON/OFF key while observingthe external voltmeter. No di...
Page 15 - OV Will Not Fire Troubleshooting; Figure 3-6. OV Will Not Fire Troubleshooting
Service Addendum 15 OV Will Not Fire Troubleshooting Figure 3-6. OV Will Not Fire Troubleshooting "OV Will Not Fire" Start Turn off supply and remove top cover. Turn onand check secondary bias and referencevoltages. (Test Points 9 through 17, Table 6-3) Voltages OK ? Troubleshoot the appropr...
Page 16 - OV at Turn-On Troubleshooting
Service Addendum 16 OV at Turn-On Troubleshooting Figure 3-7. OV at Turn-on Troubleshooting "OV at Turn-On" Start Check that the supply is not programmed to OV atturn-on. Ensure that the voltage setting is not greaterthan the OV setting. Program 0V and Max. OV, thensave the settings in Regis...
Page 17 - Output Held Low Troubleshooting (sheet 1); To Sheet 2
Service Addendum 17 Output Held Low Troubleshooting (sheet 1) Figure 3-8 Output Held Low Troubleshooting (Sheet 1 of 2) "Output Held Low" Start The supply’s output is low and the PROTannunciator is not on. Turn supply off, disconnectthe load and remove the top cover. Turn the supplyon and ch...
Page 18 - Output Held Low Troubleshooting (sheet 2); From Sheet 1
Service Addendum 18 Output Held Low Troubleshooting (sheet 2) Figure 3-8 Output Held Low Troubleshooting (Sheet 2 of 2) Check IMon voltage at A1U403-7 (TP28) to common (TP9). A1D413 Conducting ? Yes A No Yes From Sheet 1 A1D413 Conducting ? CC Comparator A1U403 defective. IMon Amp A1U403 defective. ...
Page 19 - Output Held High Troubleshooting; Figure 3-9. Output Held High Troubleshooting
Service Addendum 19 Output Held High Troubleshooting Figure 3-9. Output Held High Troubleshooting "Output Held High " Start Turn supply off and remove the top cover. Disablethe Overvoltage circuit by shorting A1U410 pins1 &2 and lifting A1R447. Turn the supply on and checkthe secondary b...
Page 23 - Cable and Connector Locations
Service Addendum 23 Cable and Connector Locations A5 DSP Board A1 Main Board A3 Front Panel Board A2 GPIB Board A4A1 Left Tunnel Board A4A2 Right Tunnel Board A1 J900 A4A3 A4A4 A6 Adapter PCA A7 Phone PCA J722 J721 A6 J900 Figure 3-18. Cable and Connector Locations for E4350B/E4351B
Page 24 - DSP Board; To remove the A5 DSP Board, proceed as follows:; Note; Disconnect the ribbon cable located at the end of the DSP board.
Service Addendum 24 DSP Board To remove the A5 DSP Board, proceed as follows: • Remove the top cover of the power supply as described under, "Top Cover Removal andReplacement." • Remove the six screws that attach the cover to the DSP board (use a T10 TORX drive). • Disconnect both cables goi...
Page 25 - Chapter 4 Differences
Service Addendum 25 Chapter 4 Differences Digital Signal Processor (DSP) Board The DSP board replaces the Secondary Interface section of the A1 Main PC board. It replaces theSecondary Microprocessor (U504), the CV and CC programming DACs, Readback D/A, DAC Reference,Readback Comparators, and the Fan...
Page 26 - Simplified Diagram of DSP Circuits
Service Addendum 26 Simplified Diagram of DSP Circuits Figure 4-9. Simplified Power/Control/DSP Circuits + O u t R 70 3 C V C on tr ol Series Reg u la to r C on tr ol A m p C V O r V in G at e CC DAC Ga te O utp u t C u rre n t R 43 2 R 43 3 R 46 5 CC O r C C C on tr ol R 44 0 10 K 10 K 10K R 490 R ...
Page 27 - Chapter 5 Differences; Model
Service Addendum 27 Chapter 5 Differences Table 5-6. Parts List for E4350B/E4351B Chassis ReferenceDesignator Model Part Number Description A1 E4350B E4350-61024 Main PC Board A1 E4351B E4351-61021 Main PC Board A2 5063-4851 GPIB Board A3 5063-2360 Keypad/Front Panel PC Board A4A2 & A4A4 5063-48...
Page 29 - Part; Main Board – Electrical
Service Addendum 29 Table 5-7. Parts List for Main PC Board Assembly (A1) ReferenceDesignator Model Part Number Description A1 E4350B E4350-61024 Main Board – Electrical A1 E4351B E4351-61021 Main Board – Electrical C401 E4350B 0160-4835 Capacitor .1uF 10% 50V C401 E4351B 0160-4834 Capacitor.047UF 1...
Page 30 - Capacitor
Service Addendum 30 Table 5-7. Parts List for Main PC Board Assembly A1 (Continued) ReferenceDesignator Model Part Number Description C448 0160-5422 Capacitor .047 uF 20% C449 0160-4791 Capacitor 10pF 5% 100V C450 0160-5422 Capacitor .047 uF 20% C451 E4351B 0160-4832 Capacitor.01UF 10% C452 0160-435...
Page 34 - Resistor
Service Addendum 34 Table 5-7. Parts List for Main PC Board Assembly A1 (Continued) ReferenceDesignator Model Part Number Description R453 0699-0533 Resistor 4.64K .1% R455 0698-0084 Resistor 2.15K 1% R456 0757-0401 Resistor 100 1% .125W R458 0698-3428 Resistor 14.7 1% R460 0757-0459 Resistor 56.2K ...
Page 43 - Chapter 6 Differences; Test Points; Test Point
Service Addendum 43 Chapter 6 Differences Test Points Table 6-3. Test Points Test Point Signal Measurement and Conditions A1 Main Board (Sheets 1-4); A5 DSP Board Connect meter or scope common to Test Point (TP) 9 when taking measurements at Test Points 10 through 46 TP9 R703-3 Secondary common (she...
Page 44 - V in CV or CC mode
Service Addendum 44 Table 6-3. Test Points (continued) Test Point Signal Measurement and Conditions The measurements at test points 26 through 39 were taken with full scale voltageand full scale current programmed. The measurements were made first in the CV mode with no load andthen in the CC mode w...
Page 56 - Figure 6-11. A6 Adapter Board Schematic Diagram