Keysight E8257D/67D - Self-Tests 9 Xx: A10 ALC Self-Test Errors

E8257D/67D, E8663D PSG Signal Generators Service Guide
Troubleshooting
Troubleshooting Assembly–Level Problems
1-42
723 Open Loop F/2 Test
• Replace the A45.
724 Close Loop VCO Test
• Replace the A45.
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
+5.2 Digital high P121–64, 65, 129, 130 +5.04 +5.36 Main Supply