Motorola GM300 Series Manuale di servizio di base - Pagina 26

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7.3

Radio Chassis and Transceiver Board

Inspect the transceiver board chassis and if required reapply thermal grease to the heatsink

area on the chassis and heat dissipating devices. You may have to remove damaged thermal

pads from the chassis and devices prior to applying the grease.

Insert the transceiver board at an angle (approximately 30°) into the chassis taking care to

slide the antenna connector and accessory connector into their cut-outs in the chassis.

Lower the transceiver board onto the chassis and align the two locating holes in the board

with the locating pins in the chassis.

Secure the cover to the chassis with the six screws previously removed.

Torque the six screws to 1.9 NM (17 in lbs) using the T20 TORX™ driver. Begin with the two

screws located in the middle of the chassis followed by the four outer screws. Since the

screws usually take a set, torque the screws a second time (1.9 NM) in the same order.

Refit the top cover over the assembled radio chassis. Press the cover down until it snaps into

place.

7.4

Align the "0" mark on the flex with the "0" mark on the chassis to the socket on the radio

assembly as shown in Figure 3-2.

Check that the back housing o-ring seal is undamaged and fitted in the groove. Replace the

seal if it is damaged (refer to the exploded view diagrams and parts list).

Fit the back housing to the control head. Ensure that the tags on the back housing align with

the snap catch grooves on the control head. Press the back housing into place until it snaps

into place.

Check that the radio chassis o-ring seal is undamaged and fitted in the groove on the chassis

assembly. Replace the seal if it is damaged.

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