4. Are all circuit breakers reset at the I/O rack power distribution bus (PDB)?
No Reset the popped circuit breaker.
This ends the procedure. Go to ″Map 0410: Repair Checkout″ in the
Diagnostic Information for Multiple Bus Systems.
Yes Go to step 5 of this procedure.
5. Are the ac power cables from the ac box to the customer’s ac power outlet
connected and seated correctly at both ends?
No Perform the following:
a. Connect the ac power cables correctly at both ends. Set the circuit
breakers to the Off position while disconnecting cables, then back to
the On position.
b. Go to step 1 of this procedure.
Yes Go to step 6 of this procedure.
6.
Note: Read the Danger and Caution notices under “Safety Notices” on page xiii
before continuing with this procedure.
Perform the following:
a. Disconnect the ac power cables from the ac box.
Note: Set the circuit breakers to the Off position while disconnecting cables,
then back to the On position.
b. Use a multimeter to measure the ac voltage at the ac box end of the power
cables.
Is the ac voltage from 200 V ac to 240 V ac?
No Perform the following:
1) Exchange the ac power cable.
This ends the procedure. Go to ″Map 0410: Repair Checkout″ in
the Diagnostic Information for Multiple Bus Systems.
2) Go to step 1 of this procedure.
Yes Go to step 7 of this procedure.
7. Perform the following:
a. Disconnect the ac power cable from the customer’s ac power outlet
Note: Disconnect all other ac power cables.
b. Exchange one of the following FRUs:
1) System rack operator panel card
2) SPCN card
3) System unit operator panel cable
4) System unit SPCN system rack to I/O rack cable
Chapter 3. Maintenance Analysis Procedures 91
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