User's Manual Part 3

Power Supply Module (PSM) – continued
MAY 2004 1X SC480 BTS Hardware Installation, Optimization/ATP, and FRU 9-19
PRELIMINARY
Replacement Procedure
This procedure requires working around circuitry that is
extremely sensitive to Electrostatic Discharge (ESD). Wear
a conductive, high impedance wrist strap during the
procedure.
Use appropriate safety measures.
CAUTION
If desired, record the BTS and PSM serial number of the failed unit in
Table 9-57 at the end of this chapter.
Remove Power Supply Module
Follow the procedure in Table 9-9 to remove the Power Supply Module.
Table 9-9: Procedure to Remove Power Supply Module
Step Action
n WARNING
Disengaging the PSM from the CCP2 Shelf will cause the site to be shutdown due to the disruption in
power to the shelf.
1 Notify operator that the PSM replacement procedure is starting and that alarms can be expected.
2 At the front of the BTS, remove the front panel cover by grasping finger grooves at the top and
bottom and pulling simultaneously.
3 Put on an ESD wrist strap or other approved grounding device.
4 Simultaneously press the locking tabs on both the top and bottom module latches
5 Pull the latches out to disengage the module from the shelf and slide the card out.
6 Place PSM in/on an anti–static container or surface.
Install Power Supply Module
Follow the procedure in Table 9-10 to install the Power Supply Module.
Table 9-10: Procedure to Install Power Supply Module
Step Action
1 Put on an ESD wrist strap or other approved grounding device.
2 If not already done, remove new PSM from its anti–static container.
3 Insert module and carefully slide into slot and push in until it is seated in the backplane.
4 Simultaneously pull both latches forward and slip the tips behind the frame.
table continued on next page
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