Tait TM8100 mobiles, Service Manual

Page: 138 / 620

138 Disassembly and Reassembly TM8100/TM8200 Service Manual
© Tait Electronics Limited November 2007
Opening the
Radio Body
The circled numbers in this section refer to the items in Figure 5.3 on
page 139 .
1. Use a Torx T20 screwdriver to remove the four screws
c
.
Important
If an options board is fitted inside the lid, an options loom
will connect the options board to the internal options con-
nector on the main board. In this case, carefully fold over
the lid and disconnect the loom.
2. Carefully remove the lid assembly
d
.
3. Inspect the main seal in the lid for damage, and replace if necessary.
Removing the
Main-Board
Assembly
The circled numbers in this section refer to the items in Figure 5.3 on
page 139 .
1. Remove the auxiliary connector bung
h
(if fitted).
2. Remove the RF connector seal
j
using one of the tabs located at the
bottom of the seal—preferably by hand. If necessary, lift up the tap
using the blade of a small flat-bladed screwdriver. Do not damage the
seal with the screwdriver.
3. Use a Torx T10 screwdriver to remove the screws
e
connecting the
main board to the chassis.
4. Use a Torx T20 screwdriver to remove the screws
i
connecting the
heat-transfer block to the rear of the chassis.
Note
Make sure not to touch the thermal paste on the chassis, the heat-
transfer block, and the underside of the main board. If the thermal
paste is contaminated, you must re-apply thermal paste as
described in
“Fitting the Main-Board Assembly to the Chassis” on
page 145 .
5. Holding a hand over the chassis to catch the main-board assembly,
turn the chassis upside down and tap its fins on the edge of the
workbench. This will release the heat-transfer block from the chassis.
6. With the >25W radio, the gap pad
1)
on the L-shaped ridge must be
replaced each time the main board is removed.
>25W