Re-Assembly Of Radio Body - Tait TM8000 Series Service Manual

6.4

Re-assembly of Radio Body

Introduction
Re-assemble Main-
board Assembly —
Apply Thermal Paste
Re-assemble Main-
board Assembly —
Fasten Parts of
Assembly
144 Disassembly and Re-assembly of Radio
There are three stages in the re-assembly of the radio body:
re-assemble main-board assembly
install main-board assembly
close radio body
The first stage is necessary only if the main-board assembly has been
disassembled, and the second only if it has been removed from the chassis.
The procedures for the three stages are given separately below. The
torque values for the fasteners involved are summarised in
If the main-board assembly needs to be re-assembled, first replenish the
thermal paste on the copper plate:
1. Thermal paste is required over the complete surface of the copper
plate. The corresponding area of the heat-transfer block is shown
in Figure 2.12. This area constitutes the contact area between the
copper plate and the heat-transfer block.
2. Inspect the area on the copper plate requiring thermal paste, as
well as the corresponding area on the heat-transfer block. If the
residual paste has been contaminated with dirt, clean off the paste.
3
3. Obtain 0.1 cm
heat-sink compound (IPN 937-00000-55) or the equivalent.
4. Use a stiff brush to apply the paste in a thin film to the required
area on the copper plate. Ensure that no bristles from the brush
come loose and remain embedded in the paste. The paste needs
to be completely free of contaminants.
Complete the assembly of the main-board assembly by securing the main
board to the heat-transfer block.
1. Fit the main board to the heat-transfer block, and screw in the
three screws that secure the copper plate to the heat-transfer block.
Use a Torx T10 torque-driver to tighten the screws to 1.7 N
(15 lbf in).
·
2. Clean off any excess thermal paste on the heat-transfer block.
3. Secure the two lock-nuts for the auxiliary connector. Use a
torque-driver with a 3/16-inch socket to tighten each lock-nut to
0.90 N m (8 lbf
·
4. Fit the lock washer and hexagonal nut of the RF connector. Use
a torque-driver with a 14 mm long-reach socket to tighten the nut
to 1.7 N m (15 lbf
·
5. Fit the rubber seal for the power connector. There is only one
correct orientation. Ensure that the seal is properly seated.
of thermal paste. Use Dow Corning 340 silicone
in).
·
in).
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TM8100 Mobile Radio Service Manual
Table 6.3.
May 2004 © Tait Electronics Limited
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