IBM 7012 G Series, Service Manual

Page: 131 / 264

Removal and Replacement Procedures
4-13
5. For the expansion unit, disconnect the cables in the following order:
a. the cable coming from the RS-485 card, which is connected to the operator panel.
b. the cable going to the ECB card, which is connected to the ECB card itself.
Operator Panel Cable
(Goes To The Expan-
sion Control Board)
RS-485 Cable
Replacement
Replace in the reverse order.
Note: When you have finished the removal and replacement procedure, tell the customer
to set the system time and date, the alternate bootlist, and any other settings stored
in NVRAM.
Attention: Go to page 2-16 for instructions to Set Unit Number for any attached expansion
unit. If the unit number is not set, the system will not boot.