IBM 3745 130, Maintenance Information Procedures

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FRU Group Table
Using the MIP FRU Group Table
Very important
The MIP FRU group table lists the FRU groups likely to be called in this manual.
This table covers MOSS/POWER FRU group for failures that prevent correct operation of the BRC
function.
Ÿ
Each FRU group contains from one to three FRUs, listed by name and location.
Ÿ The “1st FRU” is the most likely to be failing. The “3rd FRU” is the least likely.
Ÿ Usually, only one FRU in an FRU group is failing, and you should try to reduce the FRU group
to the one failing FRU.
Ÿ If you can reproduce the 3745 failure, exchange FRUs one at a time until the failing FRUs are
isolated.
Ÿ As soon as you have recorded the FRU and location in the FRU Group, go to “3745 FRU
List” on page 1-53.
Always
1. Ensure that the failing area of the machine is available for service.
2. Consult the “Exchange Precautions” on page 4-1 before removing any FRUs.
3. Check for loose cards, cables, and crossovers before exchanging FRUs.
4. Run diagnostics after any repair action.
5. Follow the 'CE leaving' procedure before returning the machine to the customer.
The FRU group table starts on the next page.
1-48
3745 Models 130 to 17A: MIP