IBM pSeries 670, Service Manual

Page: 266 / 1032

MAP 152m: Cable Problem in Power Subsystem
Step 152m-1
Record the error code and location code(s) that sent you to this MAP. You should be supplied with one or
two pairs of location codes from the action for the error code in the service guide. These location codes
are the ends of the cable or cables in question. The fourth nibble of the error code indicates the side of
the power subsystem that detected the failure. For example, 101A indicates side A (front), and 101B
indicates side B (rear). The following steps apply to the power subsystem side indicated by the error code
recorded. For each location code pair:
1. Generate the first FRU location code (from U1.35) to be replaced by taking the location code given for
the action of the error code and truncating the connector ID (/Qx).
2. Generate the second FRU location code to be replaced by taking the location code (not from U1.35)
given for the action of the error code and truncating the connector ID (/Qx).
3. Generate the third FRU location code to be replaced (the cable) by taking the location code (from
U1.35) given for the action of the error code and appending a # (number sign). For example, the
service guide for error code 101A x125 lists the location codes U1.35-P1-X3/Q1 and U1.9-V1/Q2. From
the error code, you are working on the A (front) side. From the location codes, the FRUs, in order of
replacement, (if required) are:
a. U1.35-P1-X3 - BPD1
b. U1.9-V1 - DCA1
c. U1.35-P1-X3/Q1# - cable
4. If two pairs of location codes (in other words, two cables) were reported by the eror code that sent you
to this map, repeat steps 1, 2, and 3 for the other pair of location codes. Assemble the FRU list for
both cables as follows:
a. Cable from first pair of location codes.
b. Cable from second pair of location codes.
Refer to “AIX and Physical Location Code Reference Tables” on page 57 and “Power Distribution Cabling”
on page 33.
Step 152m-2
Press the green start service button on the panel with the UEPO switch.
Step 152m-3
From the action column in the
″
Error Code to FRU
″
table entry for the error code recorded in “Step
152m-1”, find the location codes of both ends of the suspect power cable or cables.
Step 152m-4
Examine both ends of the power cable or cables, and make sure each end is properly connected and fully
seated.
Step 152m-5
Is the power cable or cables properly connected and seated fully at both ends?
Yes Go to “Step 152m-30” on page 249.
No Go to “Step 152m-29” on page 249.
Step 152m-6
Have you replaced the first FRU in the list of FRUs recorded in “Step 152m-1” in a previous service
action?
Yes Go to “Step 152m-18” on page 248.
No Go to “Step 152m-7” on page 247.
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pSeries 670 Service Guide