Tait TP9100 - Page 120

120 Disassembly and Reassembly TP9100 Service Manual
© Tait Electronics Limited May 2005
Fitting the
Main Board
The circled numbers in this section refer to the items in Figure 5.15.
1. Fit the chassis plug seal
H.
2. Place the battery pin seal
G over the three battery pins of the main
board
F.
3. If the thermal paste on the screw boss of the chassis or the main board
has been contaminated, new thermal paste must be applied:
■ Remove any residue of the old thermal paste from both contact
surfaces.
■ Use Dow Corning 340 silicone heat-sink compound
(IPN 937-00000-55).
Important Ensure that no bristles from the brush come loose and
remain embedded in the paste. The paste needs to be
completely free of contaminants.
■ Use a stiff brush to apply a thin and even coat of thermal paste over
the complete contact surface of the screw boss of the chassis.
4. Use rubber-nose pliers to carefully insert the loom of the flexible
accessory board into the accessory connector [
PL1] on the underside
of the main board.
5. Insert the main board
F into the chassis I.
6. Check that the battery pin seal
G is positioned correctly.
Important If the power/volume potentiometer, the 16-way/3-way
selector switch, and/or the antenna SMA connector were
replaced, observe the instruction in “Fitting the Non-SMT
Components” on page 118.
Important With all nuts, make sure that the tapered end faces towards
the radio.
Important The nut of the power/volume potentiometer is located at
an angle. Make sure not to tilt the nut.
7. Use a torque-driver with the modified 5/16 inch (8mm) long-reach
socket to fit the nuts of the:
■ power/volume potentiometer 1)
■ 16-way/3-way selector switch 1)
■ antenna SMA connector J
and tighten them with 10lb·in (1.13N·m).
8. Use a Torx T6 torque-driver to fit the screw
E attaching the main
board to the chassis and fasten it with 2lb·in (0.23N·m).