58 E8257D/67D, E8663D PSG Signal Generators Service Guide
Troubleshooting
Troubleshooting Assembly–Level Problems
Self–Tests 2xx: A5 Sampler 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.
200 Power Supply
1. If the supply voltages are good on the connector pins indicated, replace
the A5 Sampler.
2. If the supply voltages are bad on any of the connector pins indicated,
check the origin of the supply.
3. If the supply voltages are good at the origin, replace the A31 Motherboard.
Supply Voltage
(Vdc)
Connector Pins Minimum Value
(Vdc)
Maximum Value
(Vdc)
Origin
+32 P22–7 +31.04 +32.96 Main Supply
+15 P22–6, 21 +14.55 +15.45 Main Supply
–15 P22–2, 17 –14.55 –15.45 Main Supply
+5.2 P22–14, 29 +5.04 +5.37 Main Supply
+9 P22–5, 20 +8.82 +9.18 YIG Driver
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