TB7100 Service Manual
Disassembly and Reassembly
107
© Tait Electronics Limited
October 2005
7.7
Replacing the SI Board
Removal
1.
Disconnect the system interface cables
e
to the transmitter and the
receiver, the fan control cable
f
, and the temperature sensor cable
g
,
and move them to one side.
2.
Remove the DC power cables
h
and move them to one side.
Note the connection positions.
3.
Use a Torx T10 screwdriver to remove the two screws
j
.
Use a PZ1 Pozidriv screwdriver to remove the screw
i
on the
heatsink of U406.
4.
Carefully lift the front of the SI board off the spring clips
1)
.
5.
Carefully slide the SI board towards the front of the base station until
the connectors
b
,
c
and
d
clear the rear panel. Lift the SI board
clear of the chassis.
Fitting
1.
Slide the SI board into the tray chassis by fitting the connectors
b
,
c
and
d
into the rear panel.
2.
Press down firmly on the front of the SI board to engage the two
spring clips
j
.
Important
Make sure that the thermal pad is fitted under and the
plastic insulating washer is fitted on U406.
3.
Use a torque-driver to fasten the two screws
j
(Torx T10) the screw
i
(PZ1) on the heatsink of U406 to 4.5 lb·in (0.5N·m).
4.
Connect the system interface cables
e
to the transmitter and the
receiver, the fan control cable
f
, the temperature sensor cable
g
, and
the DC power cables
h
.
Figure 7.7
Replacing the SI board
g
h
b
c
d
Torx T10
4.5lb·in
j
j
i
1)
1)
e
f
PZ1
4.5lb·in
Summary of Contents for TB7100
Page 1: ...TB7100 base station Service Manual MBB 00005 01 Issue 1 October 2005...
Page 18: ...18 Mechanical Design TB7100 Service Manual Tait Electronics Limited October 2005...
Page 38: ...38 Functional Description TB7100 Service Manual Tait Electronics Limited October 2005...
Page 62: ...62 Circuit Descriptions TB7100 Service Manual Tait Electronics Limited October 2005...
Page 124: ...126 Servicing Procedures TB7100 Service Manual Tait Electronics Limited October 2005...
Page 140: ...142 Interface Fault Finding TB7100 Service Manual Tait Electronics Limited October 2005...
Page 216: ...218 Receiver Fault Finding TB7100 Service Manual Tait Electronics Limited October 2005...
Page 366: ...368 CODEC and Audio Fault Finding TB7100 Service Manual Tait Electronics Limited October 2005...