Agilent Technologies 34980A Service Manual download pdf (Page 130)

118 34980A Service Guide

5 Disassembly and Repair

KOM Removal

1 Remove the power supply (see the procedure on page 116).

2 Disconnect the two ribbon cables on the top of the chassis.

3 Use a 3/16” nut driver to remove the nuts holding the Ext Trig DB9

connector on the rear panel. Use a 9/32” nut driver to remove the nuts

holding the GP- IB connector on the rear panel.

4 Use a T20 Torx to remove the four screws holding the KOM printed

circuit assembly to the mainframe. Lift out the assembly.

1 2 ... 125 126 127 128 129 130 131 132 133 134 135 ... 157 158

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? ± 5C 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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Agilent Technologies 34980A Service Manual Page 130

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