Tait TM8000 Series Service Manual page 146

Install Main-board
Assembly — Secure
Assembly in Chassis
146 Disassembly and Re-assembly of Radio
Important
Ensure that the two external screws securing the main-
board assembly are properly tightened; otherwise the
radio will overheat and might be damaged.
Complete the installation of the main-board assembly by securing the
assembly in the chassis:
1. Place the main-board assembly in position in the chassis.
2. Screw in the two external screws by hand as far as possible. The
screws are labelled screw 6 and screw 7 in
the screws start easily and are not cross-threaded.
3. Identify the diagonal edge of the
in Figure 6.8.
4. While pressing down firmly on the diagonal edge of the
can, use a Torx T20 torque-driver to tighten the screws to
2.5 N m (22 lbf
·
radio will overheat.) The reason for pressing down on the can is
to ensure that the circuit board is seated correctly on the bosses for
the five internal screws.
5. Clean off any excess thermal paste on the heat-transfer block.
6. Screw in the five internal screws by hand as far as possible. The
screws are labelled screw 1 to screw 5 in
the screws start easily and are not cross-threaded. Then use a Torx
T10 torque-driver to tighten the screws to 1.9 N
7. Fit the rubber seal for the RF connector; first fit the upper part of
the seal and then press down around the sides of the seal to the
bottom. Ensure that the seal is properly seated around its entire
periphery.
8. In most radios a bung will have been supplied for the auxiliary
connector. In such cases the bung must be fitted again on re-
assembly to ensure that the radio is sealed. In fitting the bung,
ensure that it is not upside down and that it is properly seated.
PAD TOP
in). (If the screws are not tightened properly, the
·
TM8100 Mobile Radio Service Manual
Figure 6.8. Ensure that
can. The can is shown
PAD TOP
Figure 6.8. Ensure that
m (17 lbf
· ·
May 2004 © Tait Electronics Limited
in).