Self-Tests 7Xx: A6 Frac-N Self-Test Errors - Keysight Technologies E8257D Service Manual

Troubleshooting
Troubleshooting Assembly–Level Problems
Self–Tests 7xx: A6 Frac–N Self–Test Errors
Before proceeding to the reported self–test error code, check the following
voltages. If any voltages are out of specification, troubleshoot the supply
problem first.
Supply Vol tage
(Vdc)
+32
+15
–15
+5.2
+9
–5.2
–6
700 Ref Voltage
— Replace the A6 Frac–N.
701 Loop Gain
— Replace the A6 Frac–N.
E8257D/67D, E8663D PSG Signal Generators Service Guide
Connector Pins Minimum Value
(Vdc)
P32–7 +31.04
P32–6, 21 +14.55
P32–2, 17 –14.55
P32–14, 29 +5.04
P32–5, 20 +8.82
P32–4,19 –5.1
P32–3, 18 –5.88
Maximum Value Origin
(Vdc)
+32.96 Main Supply
+15.45 Main Supply
–15.45 Main Supply
+5.37 Main Supply
+9.18 YIG Driver
–5.3 YIG Driver
–6.12 YIG Driver
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