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138 Disassembly and Reassembly TM8100/TM8200 Service Manual

4. If the thermal paste on the heat-transfer block F or the tin-plated

cooper plate of the main board

1$ 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 0.1cm

of thermal paste over the

complete contact surface on the tin-plated copper plate (refer to

Figure 5.6 on page 137).

5. Place the main board

1$ in position on the heat-transfer block F, and

push them together to spread the thermal paste.

Important You must observe the following order of assembly to ensure

that the main board and the connectors are not assembled

under stress.

6. Use a torque-driver with a 3/16 inch (5mm) socket to fasten the

D-range screwlock fasteners

H to 8lb·in (0.9N·m).

7. Fit the RF connector lock washer

1@. Use a torque-driver with a

9/16 inch (14mm) long-reach socket to fasten the RF connector nut

1! to 15lb·in (1.7N·m).

8. Use a torque-driver with a Torx T10 bit to fasten the three screws

to 15lb·in (1.7N·m).

9. Loosen both the D-range screwlock fasteners

H and the

RF connector nut

1!.

10. Re-tighten both the D-range screwlock fasteners

H and the

RF connector nut

1! to the torques indicated in steps 7 and 8.

11. Fit the power connector seal

Tait TM8110 Service Manual

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