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160 Index
Troubleshooting
test points........................................................................................................................................................... 142
troubleshooting chart
output held high ................................................................................................................................................... 36
OV at turn-on ....................................................................................................................................................... 36
secondary downprogramming.............................................................................................................................. 36
troubleshooting charts................................................................................................................................................. 36
*TST? .................................................................................................................................................................. 34
*TST? Query........................................................................................................................................................ 34
U
UNREGULATED annunciator ................................................................................................................................... 55
using *IDN query.......................................................................................................................................................... 8
V
voltage, maximum programmable .............................................................................................................................. 13
- SERVICE MANUAL 1
- GPIB DC Power Supplies 1
- Agilent Series 668xA 1
- CERTIFICATION 2
- WARRANTY 2
- LIMITATION OF WARRANTY 2
- EXCLUSIVE REMEDIES 2
- ASSISTANCE 2
- SAFETY CONSIDERATIONS 3
- Safety Symbol Definitions 4
- Printing History 4
- Table of Contents 5
- Related Documents 8
- Manual Revisions 8
- Safety Considerations 9
- Conventions 9
- Electrostatic Discharge 9
- Verification 10
- Electronic Load 11
- Programming The Tests 12
- General Considerations 12
- Operation Verification Tests 13
- Performance Tests 13
- Constant Voltage (CV) Tests 13
- Verification 15 14
- Constant Current (CC) Tests 18
- 22 Verification 21
- Verification 23 22
- Averaging the CC Measurements 23
- Troubleshooting 30
- Test Equipment Required 31
- Troubleshooting Procedures 31
- Power-On Selftest 31
- Troubleshooting Charts 33
- Troubleshooting Test Points 33
- Bias and Reference Supplies 33
- Troubleshooting 35 34
- 36 Troubleshooting 35
- Troubleshooting 37 36
- 38 Troubleshooting 37
- Troubleshooting 39 38
- 40 Troubleshooting 39
- Troubleshooting 41 40
- 42 Troubleshooting 41
- Troubleshooting 43 42
- 44 Troubleshooting 43
- Troubleshooting 45 44
- 46 Troubleshooting 45
- Troubleshooting 47 46
- 48 Troubleshooting 47
- Troubleshooting 49 48
- 50 Troubleshooting 49
- Troubleshooting 51 50
- 52 Troubleshooting 51
- A3 FET Board Troubleshooting 52
- Troubleshooting 55 54
- Signature Analysis 55
- Introduction 55
- Firmware Revisions 55
- Test Headers 56
- Troubleshooting 59 58
- EEPROM Initialization 62
- Disassembly Procedures 67
- Tools Required 67
- Top Cover 68
- GPIB Board 68
- A4 AC Input Assembly 69
- A5 DC RAIL Assembly 69
- A6 BIAS Assembly 69
- A3 FET Board 69
- A1DSP1 LCD Display 71
- A1G1 and A1G2 Rotary Controls 71
- A1KPD Keypad 71
- Troubleshooting 73 72
- 74 Troubleshooting 73
- Troubleshooting 75 74
- 76 Troubleshooting 75
- Troubleshooting 77 76
- 78 Troubleshooting 77
- Troubleshooting 79 78
- 80 Troubleshooting 79
- Principles Of Operation 80
- A1 Front Panel Assembly 81
- A10 Control Board 81
- A4 AC Input Board 84
- A5 DC Rail Board 84
- Output Circuits 85
- Principles Of Operation 87 86
- Replaceable Parts 87
- How to Order Parts 88
- Diagrams 113
- General Schematic Notes 117
- 120 Diagrams 118
- Diagrams 121 119
- 122 Diagrams 120
- Backdating 146
- Backdating 153 150
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