Agilent Technologies 34980A Service Manual Page 129
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- Table of contents
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Disassembly and Repair 5
34980A Service Guide 117
3
To completely remove the power supply, unplug the main power input
(brown and blue) and the green/yellow ground wire from the power
supply printed circuit board. Unplug the fan power and dc power from
the KOM pc board.
Power Supply Disassembly
1 To disassembly the power supply, press the catch on the power supply
shield and slide the shield to release it.
2 Remove the safety shield. Using a T20 Torx, remove the four screws
holding the power supply printed circuit board to the sheet metal.
- Agilent 34980A 1
- Multifunction 1
- Switch/Measure Unit 1
- Additional Safety Notices 3
- Front Panel at a Glance 5
- Rear Panel at a Glance 6
- Rear Panel Connector Pinouts 7
- Front Panel Menu Reference 9
- Advanced 10
- Instrument Rack Mounting 11
- 367.7 mm (14.48 in) 12
- 101.9 mm (4.01 in) 12
- or 12
- 70.4 mm (2.78 in) 12
- 425.6 mm (16.76 in) 12
- Contents 13
- 3 Calibration Procedures 14
- 5 Disassembly and Repair 15
- 7 Backdating 16
- Obtaining Service 17
- Repackaging for Shipment 19
- Cleaning 19
- Self Test Procedures 20
- Obtaining Service 1 21
- 34980A Service Guide 9 21
- 1 Obtaining Service 22
- Specifications 23
- 2 Specifications 24
- Configurable by bank 33
- C or CAL:MOD? ± 5C 34
- ±(% of reading + % of range) 39
- Temperature Specifications 40
- Typical System Speeds 41
- –40°C to 70°C 47
- Product Dimensions 48
- Specifications 2 51
- 34980A Service Guide 39 51
- 34980A Service Guide 41 53
- (for the 100 mV, 1 V 53
- Calibration Procedures 55
- Calibration Procedures 3 57
- 34980A Service Guide 45 57
- Recommended Test Equipment 58
- Calibration Security 59
- Calibration Message 60
- Calibration Count 60
- Calibration Process 61
- Self-Test 62
- Quick Performance Check 63
- insulated 64
- DMM Test Considerations 65
- Zero Offset Verification 66
- of error for the relay 67
- Gain Verification 68
- Zero Adjustment Procedure 73
- Gain Adjustment 74
- –100 kHz 75
- Gain Adjustment Procedure 76
- Plug-in Modules 78
- 34980A Service Guide 67 79
- 34951A Verification 80
- Analog Output Adjustment 83
- 34952A Multifunction Module 84
- Relay Plug-in Modules 86
- 34980A Service Guide 75 87
- Agilent Technologies 89
- Unit seems inoperative 90
- Isolating to an assembly 90
- Unit fails self-test 90
- Power Supply 91
- Product Firmware Updates 91
- Instrument Errors 92
- Front-Panel Operation 93
- Remote Interface Operation 93
- Error Numbers 94
- Self-Test Errors 97
- Calibration Errors 98
- Firmware Update Errors 99
- Plug-In Module Errors 100
- Relay and FET Replacement 103
- 92 34980A Service Guide 104
- 94 34980A Service Guide 106
- 96 34980A Service Guide 108
- 98 34980A Service Guide 110
- 100 34980A Service Guide 112
- 102 34980A Service Guide 114
- 104 34980A Service Guide 116
- Two-Wire Mode 119
- One-Wire Mode 119
- 34933A Two-Wire Mode 120
- 34933A One-Wire Mode 121
- 34937A 32-Channel GP Switch 123
- Disassembly and Repair 125
- Surface Mount Repair 126
- Tools Required 126
- Basic Disassembly 127
- in the mainframe as shown 128
- Power Supply Disassembly 129
- KOM Removal 130
- Front Panel Removal 131
- Front Panel Disassembly 132
- DMM Removal 133
- Backplane Removal 134
- Replaceable Parts 135
- Mainframe Replaceable Parts 137
- 34921A Replaceable Parts 138
- 34922A Replaceable Parts 138
- 34923A Replaceable Parts 139
- 34924A Replaceable Parts 139
- 34925A Replaceable Parts 139
- 34931A Replaceable Parts 140
- 34932A Replaceable Parts 141
- 34933A Replaceable Parts 142
- 34937A Replaceable Parts 142
- 34938A Replaceable Parts 142
- Vendor Addresses 143
- 6 Replaceable Parts 144
- Backdating 145
- Diagrams 147
- 34921A Component Locator 148
- 34922A Component Locator 149
- 34923A Component Locator 150
- 34924A Component Locator 151
- 8 Diagrams 152
- Diagrams 8 153
- 34980A Service Guide 141 153
- 34931A Component Locator 154
- 34932A Component Locator 155
- 34933A Component Locator 156
- 34937A Component Locator 157
- 34938A Component Locator 158
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