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2. Service

Diagnostic Trees and Procedures

Warm-up and Operating Fatal Error Diagnostic Tree

(Diagnostic Subsection 3)

1.3.1 Warm-Up/Operating Error

1.3.1.1 Operating Error-Code Interpretation

1.3.2 Interpreting Warm-Up Errors

1.3.2.1 Cs Oven Failed: Ion-Pump Over current Warm-up Error

1.3.2.2 A16/CBT Excess Ion-Pump Current Test

1.3.3 CBT Signal Fatal Errors

1.3.4 CBT Shutdown Message

1.3.5 Cs Oven Timeout Test

1.3.6 CBT Background Signal Warm-Up Errors

1.3.7 CBT Depth of Modulation Warm-Up Errors

1.3.7.1 CBT Support Circuits Test

1.3.8 RF Level Control-Current Test

Warning Message Diagnostic Tree (Diagnostic Subsection 4)

1.4.1 Warning Message Interpretation

1.4.2 Signal Gain at Range Limit/CBT Signal Low

1.4.3 5071A Profiling (CBT Performance Evaluation)

1.4.4 Power Source is Batt (Ignore this for Opt 048)

1.4.4.1 Ac Line Operation - Battery Indicator On

1.4.4.2 Instrument Ac Power Absent

1.4.4.2.1 A1C4 Voltage Test

1.4.4.3 LF1/T1 Transformer Fault Verification

I/O Diagnostic Tree (Diagnostic Subsection 5)

1.5.1 Input/Output Faults

CBT Performance Evaluation (Diagnostic Subsection 6)

1.6.0 Running the 5071A Profiling Software

1.6.1 5071A Profiling Results Evaluation

Advisory Messages (Diagnostic Subsection 7)

1.7.1 Advisory Message Interpretation

Symmetricom 5071A Assembly And Service Manual

Other manuals for Symmetricom 5071A