IBM 6151 Maintenance And Service Manual page 396

Step 4
The last adapter or a FRU attached to it is failing.
62-Pin
Connector
•
A..JZB~4f>
IS THE FAILING ADAPTER THE RT PC EXPANSION UNIT
ADAPTER?
NO
Use the removal procedure in the section that applies to the
failing FRU and exchange it; then continue On the next
page.
YES Go to "IBM RT PC 6192 Expansion Unit PIC 0100" on
page 3-0100-1.
3-9840-4 Service Manual