Tait TB7100, Руководство по обслуживанию

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102 Disassembly and Reassembly TB7100 Service Manual
© Tait Electronics Limited October 2005
7.3 Replacing the Receiver Module
Removal
Note
Release the latch underneath the DC power connector before
attempting to disconnect it.
1. Disconnect the cables to the RF
b
, DC power
c
, system interface
d
, and the user interface
e
connectors.
2. Use a Torx T10 screwdriver to remove the five screws
f
and
g
together with the spring washers and flat washers.
3. Lift the receiver module clear of the chassis.
4. Make sure not to lose the metal heatsink
g
for the audio PA.
Note
Although the transmitter and receiver modules look alike, a
transmitter module can not replace a receiver module. There is no
heat transfer plate on the receiver. Check that the replacement
module has links, LK2, LK3 and LK4 not fitted as shown above.
Fitting
Note
Before fitting the receiver module, make sure that the metal
heatsink
h
for the audio PA is fitted to the tray chassis.
1. Place one screw
g
into the hole above the metal heatsink plate by:
a. holding the module at a 60° angle
b. fitting the screw on the Torx driver
c. slipping it through the shield hole and into the board hole.
2. Position the receiver module inside the tray chassis.
3. Use a Torx T10 torque-driver to tighten the screws
f
and
g
to
4.5lbf·in (0.5 N·m).
4. Connect the cables to the RF
b
, DC power
c
, system interface
d
,
and user interface
e
connectors.
Figure 7.3 Replacing the receiver module
f
g
e
b c d
f
Check that links LK2, LK3 and
LK4 are not fitted.
Torx T10
4.5lb·in
Torx T10
4.5lb·in
h