IBM @Server pSeries 630 6C4, Service Manual

Page: 137 / 651

Step 1522-15
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 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
Eserver
pSeries
Diagnostic Information for Multiple Bus Systems .
YES Go to “Step 1522-16”.
Step 1522-16
Reconnect the ac power cable(s) to the power distribution unit.
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 from each power supply of the I/O drawer.
2. Use a multimeter to measure the ac voltage at the drawer end of each ac power cable.
Is the ac voltage from 200 V ac to 240 V ac?
NO Replace the ac power cable(s).
This ends the procedure. Go to
″
MAP 0410: Repair Checkout
″
in the RS/6000
Eserver
pSeries
Diagnostic Information for Multiple Bus Systems .
YES Go to “Step 1522-17”.
Step 1522-17
Replace the following in the I/O drawer, one at a time, disconnecting the ac power cable (dc power cable
for a dc-powered system) to each power supply before replacement and reconnecting the ac power cable
(dc power cable for a dc-powered system) to each supply after replacement:
v
I/O power supply 1.
v
I/O power supply 2.
v I/O drawer backplane
Does the operator panel show the OK prompt?
NO Contact your next level of support for assistance.
YES This ends the procedure. Go to
″
MAP 0410: Repair Checkout
″
in the RS/6000
Eserver
pSeries
Diagnostic Information for Multiple Bus Systems .
Chapter 3. Maintenance Analysis Procedures (MAPs)
117