Tait TB9300, Installation And Operation Manual

Page: 105 / 138

TB9300 Installation and Operation Manual
Replacing Modules 105
© Tait Limited March 2016
8.2 Preliminary Disassembly
Hot-pluggable
Modules
The reciter, PA and front panel are hot-pluggable and can be removed
without powering down the whole base station. These modules can also be
removed without disrupting the system control bus communications with
the other modules in the subrack.
Notice
Before removing a PA, disconnect the DC input and RF input
first, followed by the RF output. After refitting the PA, reconnect the RF
output first, followed by the RF input, and then the DC input.
Disconnecting the
Power
If you want to disconnect the power before working on the base station,
follow these steps.
Caution Before disconnecting the battery supply leads from the
PMU, open the circuit breaker or disconnect the supply leads from the
battery.
1. Turn off the AC
b
and DC
c
switches at the rear of the PMU.
2. Also at the rear of the PMU disconnect the mains
d
and battery
e
supply leads, and the auxiliary DC supply lead
f
(if fitted).
b c d e f