Northern Telecom Meridian SL-1 Reference Manual page 33

3-20 Equipment replacement
2-Mb/s Remote Peripheral Equipment
Chart 3-13
Peripheral equipment shelf backplane replacement
St ep Pr oced ur e
1 Log in to the system and load overlay program 32 as described in
553-2301-511.
2 Disable the PE shelf being replaced using command DISS l s, where
l is the loop number and s is the shelf number.
Note: If the loop is extended to a second PE shelf, that shelf must also
be disabled.
3 If the backplane being replaced is located on the same level as the
RPE shelf in the first tier (base) of the cabinet, remove the PE1 fuse
from the QUX19 power unit.
If the backplane being replaced is located in shelf positions 2
through 5, set the corresponding PE breaker (PE2, PE3, PE4 or
PE5)
4 Disconnect power cable from connector J on the backplane being
replaced.
5 Unseat all circuit packs from backplane being replaced.
6 Remove the hex screws securing the top and bottom of the
backplane to the cabinet and remove backplane.
7 Position the new backplane and secure to cabinet with hex screws.
8 Reconnect power cable to connector J on backplane.
9 Reconnect all cables previously disconnected from connectors on
shelf backplanes.
10 Reinsert all circuit packs previously unseated.
11 Reinsert PE1 fuse (if removed) on QUX19 unit or set PE breaker on
QUX20 unit for replaced backplane to ON.
Appendix 1 to 553-2741-500