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5-25
91390 QUBE
TROUBLESHOOTING
Module does not sign on when installed in the monitor for options
A and B
1 If a Pod is available, connect it to the 91390. If the Pod signs on,
replace the Interconnect PCBA.
2 If the Pod does not sign on, check that the +12vdc, -12vdc, and
+5vdc voltages for the module and Pod are present.
These voltages are accessible on the Pod connector pins. Refer to
Figure 5-19 on page 5-25:
Figure 5-19 Voltage Test Points on Pod Interface Connector
3 If all three voltages are present, the problem is in the SDLC link.
Replace in order: the Interconnect PCBA, and then the CPU
PCBA.
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