IBM 6151 Maintenance And Service Manual page 285

Step 5
1.
Record the SRNs for the errors that are related to the hardware
you servIce.
2. Look up the FRUs that correspond to the SRAs in each SRN.
3. Use the removal and replacement procedures in the section that
applies to the FRU and exchange the FRU that corresponds to
the first SRA in the SRN.
4. Ask the customer to run the failing application again.
DID THE
SAME FAILURE OCCUR?
NO This completes the repair.
YES Continue on the next page.
(6/88) Problem Isolation Charts 3-0080-5