IBM RT PC 10 Hardware Maintenance And Service page 168

Alx
FRU: Fixed-disk and Diskette Drive Cables
Additional Tests: Run the Diskette Drive(s) Checkout.
Removal Procedure: See "Adapter Removal" on page 4-16.
Repair Checkout: Run the Fixed-disk Drive(s) Checkout and the
Diskette Drive(s) Checkout.
A6x
FRU: IBM PC Network Cable
Additional Tests: None
Removal Procedure: See the Setup Instructions for the IBM PC
Network Short, Medium, and Long Distance
Kits. Exchange either an expander or a cable.
See Section 9 for parts reference.
Repair Checkout: Run the PC Network Adapter Checkout.
A7x
FRU: Modem Cable - RS232C (lO Pin)
Additional Tests: Run the 4 Port Asynchronous RS232C Adapter
Checkout.
Removal Procedure: See "Adapter Removal" on page 4-16.
Repair Checkout: Run the 4 Port Asynchronous RS232C Adapter
Checkout.
Problem Isolation Charts 3-123