Symmetricom 5071A Assembly And Service Manual

ix
Contents
Assembly- Level Service Manual ............................................................................................i
Declares under our sole legal responsibility that the .......................................................viii
Contents...................................................................................................................................ix
Preface ...................................................................................................................................xiii
Repair Strategy ...................................................................................................................xiii
Text Conventions used in this manual................................................................................xiii
Instrument Identification ....................................................................................................xiii
Instruments Covered by This manual.................................................................................xiv
Manual Organization..........................................................................................................xiv
How to Order Manuals .......................................................................................................xiv
1. Performance Tests – Verifying Specifications...................................................................1
Introduction ...........................................................................................................................1
Operational Verification .....................................................................................................1
Complete Performance Tests..............................................................................................1
RS-232 Verification............................................................................................................1
Test Record............................................................................................................................ 2
Equipment Required.............................................................................................................. 2
5071A Operational Verification ............................................................................................ 5
Power-On Self-Tests and Servo Lock.................................................................................5
Rear-Panel Output Signal Checks.......................................................................................7
RS-232 Serial Port Verification..........................................................................................8
5071A Complete Performance Tests................................................................................... 10
Test 1 — Output Signals: Harmonic Distortion and Spurious Signals Check..................10
Test 2 — Frequency Accuracy .........................................................................................18
Test 3 — Stability.............................................................................................................21
Performance Test Record..................................................................................................22
2. Service.................................................................................................................................25
Introduction .........................................................................................................................25
Returning the Instrument to Symmetricom for Service....................................................... 26
To Provide Repair Information.........................................................................................26
To Pack in the Original Packaging Materials ...................................................................26
Pre-Troubleshooting Information........................................................................................ 27
Safety Considerations .......................................................................................................27
Recommended Test Equipment........................................................................................28
Repair Considerations.......................................................................................................28
After Service Considerations............................................................................................28
Service Accessories ..........................................................................................................29
Assembly Identification and Location..............................................................................31
Diagnostic Trees and Procedures......................................................................................... 33
5071A Diagnostic Tree Organization...............................................................................34
Navigating the Diagnostic Trouble-Tree Sections............................................................34
Top-Level Diagnostic Tree Organization.........................................................................35
Top-Level Diagnostic Tree (Diagnostic Section 1)................................................... 37
1.0.0 First Power On.........................................................................................................37

Symmetricom 5071A Specifications

General

Brand	Symmetricom
Model	5071A
Category	Measuring Instruments
Language	English