Service Manual

GSM-204-523
Replacing a circuit breaker module (CBM)
31st Oct 01
Maint. 3–22
Maintenance Information: Horizon macro outdoor
CONTROLLED INTRODUCTION
68P02902W04-A
Replacing a circuit breaker module (CBM)
Preconditions
for CBM
replacement
The CBM controls power for the power supply enclosure, apart from the PSMs.
Consequently, the replacement of a CBM can only take place after the cabinet
has been taken out of service, in agreement with the OMC-R.
Views of CBM
Figure 3-10 shows views of the CBM with circuit breaker buttons identified.
FRONT VIEW
BACKPLANE CONNECTOR
M4 MODULE ATTACHMENT
SCREWS
HANDLE-BAFFLE
ig.281.rh
6 CTUs (0 TO 5)
15 A2 A4 A
7 A
NOT USED SURF
NOT USED
BPSMs (A AND B)
7 A
Figure 3-10 Views of CBM with circuit breaker buttons identified