IBM 6151 Maintenance And Service Manual page 310

Step 8
One of the following FRUs is failing;
• The Receiver Card
• The RT PC 6192 Expansion Board
• The RT PC Expansion Unit Cable
• The RT PC Expansion Unit Adapter (in the system unit).
Do the following to isolate the failing FRU.
1.
In the order listed, exchange one of the FRUs above.
2. Run the failing procedure using the ADVANCED DIAGNOSTIC
SELECTION menu.
DlAG-2
The Service Request Number is:
13-521-66B
WRITE .....down the above number.
RETURN ....to the Hardware Maintenance and Service ManuaL
DID THE PROCEDURE FAIL?
NO The last FRU you installed was defective. Continue on the
next page.
YES Return the original FRU to the unit; then repeat this step.
3-0100-8 Service Manual