IBM pSeries 670, Service Manual

Page: 259 / 1032

MAP 152l: -12.0V Current/Voltage Problem in I/O Subsystem
Step 152l-1
Record the error code and location code(s) that sent you to this MAP.
Step 152l-2
Determine the I/O subsystem number from the error code (10yy xxxx) and the following list. The remaining
steps of this map refer to this I/O subsystem:
v If yy=14, I/O subsystem number is 1, location is U1.9
v If yy=15, I/O subsystem number is 2, location is U1.5
v If yy=16, I/O subsystem number is 3, location is U1.1
v If yy=17, I/O subsystem number is 4, location is U1.13
v If yy=21, I/O subsystem number is 5, location is U2.1
v If yy=22, I/O subsystem number is 6, location is U2.5
v If yy=23, I/O subsystem number is 4, location is U2.9
v If yy=24, I/O subsystem number is 7, location is U2.13
v If yy=25, I/O subsystem number is 8, location is U2.19
Step 152l-3
Turn off the power.
Examine the green
″
power good out
″
LEDs of both I/O subsystem DCAs.
Step 152l-4
Are all the green
″
power good out
″
LEDs of both I/O subsystem DCAs off?
Yes Go to “Step 152l-5”.
No Call for support.
Step 152l-5
Remove the following adapter cards, if present, from the I/O subsystem. Record the adapter locations:
v
Adapter card at P1-I1
v
Adapter card at P1-I2
v
Adapter card at P1-I3
v
Adapter card at P1-I4
v
Adapter card at P1-I5
Step 152l-6
Turn on the power.
Step 152l-7
Did the system stop with the same error code as recorded in “Step 152l-1”?
Yes Go to “Step 152l-13” on page 240.
No Go to “Step 152l-8”.
Step 152l-8
One of the cards just removed is defective.
Turn off the power.
Make sure all the green
″
power good out
″
LEDs of both I/O subsystem DCAs are off.
Step 152l-9
Reinsert one of the cards that is removed and listed in “Step 152l-5”.
Step 152l-10
Turn on the power.
Chapter 3. Maintenance Analysis Procedures
239