IBM RS/6000 Enterprise Server M80 Service Manual page 106

Step 1521-12
Are all circuit breakers reset at the rack power distribution unit(s)?
NO Reset the popped breaker.
This ends the procedure. Go to "MAP 0410: Repair Checkout" in the RS/6000 and Eserver
pSeries Diagnostic Information for Multiple Bus Systems.
YES Go to "Step 1521-13."
Step 1521-13
Are all the ac power cables seated firmly and connected correctly from the rack power distribution
unit(s) to the rack drawers?
NO Fix the connection.
This ends the procedure. Go to "MAP 0410: Repair Checkout" in the RS/6000 and Eserver
pSeries Diagnostic Information for Multiple Bus Systems.
YES Go to "Step 1521-14."
Step 1521-14
Follow the ac power cable(s) from the primary I/O drawer to the appropriate power distribution unit.
Is the power distribution unit power LED on?
NO Go to "Step 1521-18" on page 90.
YES Go to "Step 1521-15."
Step 1521-15
Note: Read the danger and caution notices under "Safety Notices" on page xi before continuing with this
procedure.
Perform the following:
1. Disconnect the ac power cable(s) from the power distribution unit that supplies power to the primary
I/O drawer.
2. Use a multimeter to measure the ac voltage at the power distribution unit socket(s) where the ac
power cable(s), just removed, was (were) attached.
Is the ac voltage from 200 V ac to 240 V ac?
NO Replace the power distribution unit
This ends the procedure. Go to "MAP 0410: Repair Checkout" in the RS/6000 and Eserver
pSeries Diagnostic Information for Multiple Bus Systems.
YES Go to "Step 1521-16" on page 89.
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Service Guide