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Troubleshooting
Troubleshooting Assembly–Level Problems
Self-Tests 1xx for the A13 I/Q Multiplexer
100 Power Supply
• If all power supply voltages are good on the A31 Motherboard, replace the A13 I/Q Multiplexer.
• If any of the supply voltages are bad on the A31 Motherboard, check the origin of that supply.
— If the supply voltage is good at the origin, replace the A31 Motherboard.
— If the supply voltage is bad at the origin, troubleshoot the origin.
101 CAL Source
• Replace the A13 I/Q Multiplexer.
Power Supply Voltage
(Vdc)
A31 Motherboard
Connector Pins
Minimum
(Vdc)
Maximum
(Vdc)
Origin
+15 P152 – 28 +14.55 +15.45 Main Supply
−15 P152 – 3 −15.45 −14.55 Main Supply
+5.2 P152 – 5, 27 +5.04 +5.36 Main Supply
−5.2 P152 – 1 −5.36 −5.04 A9 YIG Driver
−5.2 V2 P152 – 26 −5.36 −5.04 A31 Motherboard
+5.2 D P151 – 64, 65, 129, 130 +5.04 +5.36 Main Supply
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