TB9100/P25 CG/P25 TAG Installation and Operation Manual Replacing Modules 105
© Tait Limited March 2014
7.6 Replacing a Power Management Unit
Notice You must disconnect the AC and DC power cables before
removing the PMU from the subrack.
Removal 1. If you have not already done so, carry
out the instructions in “Preliminary
Disassembly” on page 96.
2. At the front of the PMU, unplug the
output power cable(s)
b and system
control bus loom
c, and move them
to one side.
3. Loosen the screw securing the
retaining clamps
d and rotate the
clamps through 90° to clear the
module.
4. Slide the PMU out of the subrack,
taking care not to damage any of the
cables.
Refitting 1. Slide the replacement PMU into the subrack and secure it with the
retaining clamps.
2. Reconnect all the front and rear panel cables previously disconnected.
Connect the DC power cables on the rear panel as shown in
Figure 3.7 on page 63. Tighten the screws to a torque of 18–20lbf·in
(2–2.25N·m). Ensure the front panel cables are retained by the cable
retaining clips in the top of the subrack.
If you need to remove any front panel cables, simply pull the front of the
cable retaining clip down and then slide it out from the subrack until it
reaches the end of its travel.
3. Carry out the instructions in “Final Reassembly” on page 115.
dbcd
(obscured)
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