E8257D/67D, E8663D PSG Signal Generators Service Guide 71
Troubleshooting
Troubleshooting Assembly–Level Problems
725 Low Band Filter Test
— Replace the A45.
Self–Tests 9xx: A10 ALC 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
Voltage
(Vdc)
Connector Pins Minimum
Value
(Vdc)
Maximum
Value
(Vdc)
Origin
+32 P122–4 +31.04 +32.96 Main Supply
+15 P122–28 +14.55 +15.45 Main Supply
–15 P122–3 –14.55 –15.45 Main Supply
+5.2 P122–2, 27 +5.04 +5.37 Main Supply
–5.2 P122–1, 26 +5.30 +5.10 YIG Driver
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