Service Manual

GSM-204-523
Replacing a SURF module
31st Oct 01
Maintenance Information: Horizon macro outdoor
68P02902W04-A
CONTROLLED INTRODUCTION
Maint. 3–31
Replacing a SURF module
Preconditions
for SURF
replacement
The cabinet contains only one SURF module, either a dual band SURF or a
single band SURF. Consequently, the replacement of a SURF module can only
take place after the cabinet has been taken out of service, in agreement with the
OMC-R.
CAUTION
An earthing wrist strap must be worn when handling SURF
modules. An ESP earthing connection point is provided
above the leftmost PSM.
View of the
SURF
Figure 3-15 shows a single band SURF module. Where RXn appears in
Figure 3-15, the n may be 850, 900, 1800 or 1900, depending on the frequency
of the SURF module.
RXn
1B
RXn
2B
GUIDE RAIL FOR
INSERTION
SIX N-TYPE RECEIVE ANTENNA CONNECTIONS
(2 PER DLNB EQUIVALENT)
EXTENSION PORTS TO
OTHER CABINETS
3 CONNECTORS ON UNDERSIDE
TO SURF HARNESS
HANDLE FOR
MODULE
REMOVAL
FOUR M6 MODULE
ATTACHMENT
SCREWS
RXn
0A
RXn
1A
2A
RXn
RXn
0B
Single band SURF
Figure 3-15 View of a single band SURF module
NOTE
The dual band SURF replacement procedure is almost
identical, with the addition of the extra two second
frequency antenna connections.