User Manual

E -GPS (External -GPS) Chapter 4: E -GPS (External -GPS) R eplacement Procedures
Prerequisite
Before You Begin
Before you begin, record the pertinent information in the following table (see T able 4 -2 ):
Table 4 -2 Item Number R eplacement List
Item
Number
BTS number
F ailed E -GPS number
E -GPS Replacement Procedure
P erform the steps in Procedure 4 -1 to replace the E -GPS .
Procedure 4 -1 E -GPS R eplacement Procedure
A T THE BTS SITE
1
Disconnect all cables from the E -GPS front panel. If desired, tag all cables prior to
disconnecting them. Move cables out of the way .
2
Using a T25 TORX bit and driver , loosen the thumbscrew on the module front panel. Using
your thumb and finger , completely loosen the captive thumbscrew .
3
Pull up on the thumbscrew to start removing the module. Then grasp the module front panel
and pull the module completely out of the E -GPS mounting bracket.
4
W ith the replacement module properly positioned in front of the E -GPS mounting bracket,
align the module bottom side rails with the guide channels of the mounting bracket. Slide the
module completely into the mounting bracket.
5
Align the module thumbscrew with the threaded hole in the mounting bracket. Using a T25
TORX bit and driver , tighten the thumbscrew to 4.77 N-m (42 in-lb).
6
Reconnect all cables to the E -GPS front panel.
A fter the replacement E -GPS is re-connected and powered up, it may take up to 30
minutes for the replacement E -GPS to successfully track and acquire satellites.
7
If optimization is to be performed at this time, see Optimization Required
following this table.
4 -4 68P09283A64 -3
FOA SEP 2007