128 Disassembly and Reassembly TM9100 Service Manual© Tait Electronics Limited August 2005Disassembling theMain-BoardAssemblyThe circled numbers in this section refer to the items in Figure 5.4 onpage 129. This figure shows the 50W/40W configuration.1. Remove the power connector seal I.2. Use a torque-driver with a 3/16 inch (5mm) socket to remove theD-range screwlock fasteners H.3. Use a torque-driver with a 9/16 inch (14mm) long-reach socket toremove the RF connector nut 1!. Also remove the lock washer 1@.4. Use a Torx T10 screwdriver to remove the three screws b securingthe main board 1$ to the heat-transfer block F.Note Make sure not to touch the thermal paste on the heat-transferblock and the underside side of the main board. If the thermalpaste is contaminated, you must re-apply thermal paste asdescribed in “Reassembling the Main-Board Assembly” onpage 131.5. Separate the main board 1$ from the heat-transfer block F.6. Inspect the inner foam D-range seal E and the outer foam seal G,and replace if necessary.7. The gap pad 1) (50W/40W radio only) must be replaced each timethe heat-transfer block is separated from the main board.8. To replace the power connector J:■ With the 50W/40W radio, use a Torx T6 screwdriver to undo thetwo screws C.■ With the 25W radio, use a Torx T10 screwdriver to undo the twoscrews C.
