Keypad, Display, And Keypad/Option Board Disassembly - Motorola GP140 Basic Service Manual

Radio Disassembly Ñ Detailed
3. Remove the O-ring.
4. Slide off the ground contact from the top corner boss of the radio chassis.
6.3

Keypad, Display, and Keypad/Option Board Disassembly

1. 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.)
2. Lay this ßex circuit to one side.
3. To remove the keypad retainer shield:
a. Insert the tip of a Òpenknife size,Ó ßat blade screwdriver in the opening at the end of the
keypad retainer arm tab.
b. 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.
4. 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.
5. 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.)
6. 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