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EX500 Radio Reassembly — Detailed
6. After the universal connector tail of the speaker-microphone assembly is removed, the assembly
can be completely removed. If it is necessary to replace the speaker or microphone, or both, do it
while the flex circuit is removed from the front cover. When reassembling the microphone in its
boot, make sure the microphone port faces the round hole in the bottom of the boot.
3.7.4 Controller Board Disassembly
1. Use a Philips head screwdriver to remove the screw from its position.
2. Insert a flat bladed screwdriver in between the controller board and front cover. Pull up the
screwdriver to disassemble the controller board from front cover. (See Figure 3-7.)
3.7.5 Control Top Disassembly
1. To remove the control top assembly, place a screwdriver next to the antenna boss, and pry it
against the control top escutcheon. This will lift the control top escutcheon away from its double-
sided adhesive. Grab the double-sided adhesive near the volume potentiometer, and lift it away.
2. Remove the control top seal, emergency button, and transmit light pipe.
3.8
EX500 Radio Reassembly — Detailed
3.8.1 Control Top Reassembly
1. Replace transmit light pipe, control top seal and top adhesive.
2. Peel off the liners from a new control top escutcheon, and place it in the recess in the front cover.
Press the control top escutcheon tightly against the adhesive.
3.8.2 Speaker, Microphone, and Universal Connector Flex Reassembly
1. Feed the universal connector stiffener of the speaker-microphone flex assembly through the
opening in the side wall of the front cover.
2. Peel off the adhesive liner on the back of the universal connector stiffener of the flex circuit.
Attach the flex stiffener to the front cover using the guide pins for correct alignment.
Figure 3-7 Removing the Controller Board from the Front Cover
M2x3 Philips Screw
Controller Board
Front Cover
3-9
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Troubleshooting
