Symmetricom 5071A Assembly And Service Manual

Contents
xi
Functional Block Descriptions ..........................................................................................130
Instrument Control Block ...............................................................................................133
Reference Oscillator/RF chain Block .............................................................................137
Cesium Beam Tube Block ..............................................................................................139
Analog Signal Chain Block ............................................................................................141
Input/Output Block .........................................................................................................143
Power Supply Block .......................................................................................................144
A1 Motherboard Circuit Description..............................................................................146
A11 Power Steering Logic Assembly.............................................................................147
Figure 3-8. Opt. 048, Power Supply Block Diagram......................................................156
A12 Dc-Dc Power Converter Module ............................................................................158
LF1 AC-Line Filter/Cable Assembly..............................................................................158
T1 Toroidal Power Transformer.....................................................................................158
B1 Internal-Standby Battery ...........................................................................................158
4. Replacing Assemblies - Disassembly and Reassembly .................................................160
Introduction .......................................................................................................................160
Tools Required ..................................................................................................................160
Do This First...................................................................................................................... 161
To Remove the Covers ...................................................................................................... 161
To remove the A2 CBT Control Assembly....................................................................... 162
To Remove Any Other PC Boards ....................................................................................162
To Remove A1 Motherboard Assembly............................................................................ 162
To Remove A10 Output Frequency Distribution Amplifier Module ................................163
To Remove A12 Dc-Dc Power Converter Module ...........................................................164
To Remove A13 Front Panel Module................................................................................165
To Remove A14 Signal Amplifier Module .......................................................................166
To Remove A15 9.2 GHz Microwave Generator Module................................................. 167
To Remove A16 High Voltage Supply Module ................................................................167
To Remove A17 CBT Assembly....................................................................................... 168
Preparation......................................................................................................................168
10890A or 10891A CBT Removal.................................................................................168
CBT Installation..............................................................................................................169
Operation Verification....................................................................................................171
Disposal Procedure for Symmetricom Cesium Beam Tubes..........................................172
To Remove A19 Reference Oscillator Module ................................................................. 173

Symmetricom 5071A Specifications

General

Brand	Symmetricom
Model	5071A
Category	Measuring Instruments
Language	English