Motorola GP140 Series Базовое руководство по обслуживанию - Страница 21

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Radio Disassembly Ñ Detailed

Remove the O-ring.

Slide off the ground contact from the top corner boss of the radio chassis.

6.3

Keypad, Display, and Keypad/Option Board Disassembly

If the disassembly of the keypad, the keypad printed circuit board, or the display is required,

lift the microphone ßex circuit up, and carefully remove the microphone and its boot from the

front cover pocket. (See Figure 3-6.)

Lay this ßex circuit to one side.

To remove the keypad retainer shield:

Insert the tip of a Òpenknife size,Ó ßat blade screwdriver in the opening at the end of the

keypad retainer arm tab.

Pry the tab away from the side of the front cover until it moves past the ledges on the

side wall. Duplicate this procedure for each of the four retainer arm tabs.

Note that the two Òtop hooksÓ are still held underneath the front coverÑright below the

speaker. Lift the keypad retainer out of the front cover; then, lift and pivot the two hooks out of

the front cover.

If disassembly involves the removal of the display module, disconnect the display ßex from the

keypad option board connector by lifting the latch on the connector. (This is similar to the pro-

cess for releasing the ßexes.)

The display module is attached to the front cover with a double-sided adhesive pad. Carefully

pull up on the display module, using a small screwdriver, if necessary, and remove it from the

front cover. Use a new piece of double-sided adhesive to re-mount the display to the cover.

CAUTION: Take care not to damage the display. Do not cut, bend, or pinch the heat seal. Display mod-

ules contain CMOS devices. Be sure to use ESD protection.

Speaker-Microphone

Flex Circuit Tail

Keypad Retainer

Arm Tabs (4)

Retainer

Top Hooks

Figure 3-6 Remove Retainer

Flat Blade

Screwdriver

Retainer

3-7