Chassis Assembly Reassembly - Motorola EX500 Basic Service Manual

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3. Replace the universal connector escutcheon. Make sure that all the connector openings align
with the gold pads on the flex circuit.
4. Peel off the adhesive liner on the speaker rubber.
5. Align the top notch in the speaker at the twelve o'clock position with the tab on the front cover.
(See Figure 3-6.) Push down the speaker until the two bottom notches fit into the catches on the
housing.

3.8.3 Chassis Assembly Reassembly

1. Slide on the ground contact (if necessary) on the top corner boss of the chassis.
2. Replace the O-ring. The tabs on the O-ring should reach around the chassis and point down.
3. Stretch the O-ring to place it into the retaining pocket at the bottom end of the chassis.
NOTE When properly assembled, the retainers on the O-ring should align with the slots on the
chassis. If this is not the case, remove and replace the O-ring until it is aligned with the
chassis and completely seated in place around the perimeter.
4. Ensure that the antenna nut insulator is correctly replaced by pushing it all the way to the top of
the antenna nut.
5. Replace the battery contact seal (if necessary) surrounding the battery contact.
6. Place the main circuit board straight down on top of the chassis.
NOTE Be sure the battery contact seal protrudes through the chassis and is not pinched under the
chassis.
7. Use a Philips head screwdriver size 0 to fasten the screws holding the main board to the chassis.
8. Do not over torque. Torque limit is 3 inch lbs.
3.8.4 Chassis and Front Cover Reassembly
1. Align the chassis assembly end-to-end with the front cover assembly.
2. Insert the tails of the flex circuits into their respective connectors at the bottom of the front cover.
3. Push down the latches on the connectors to hold the flex circuits to the main board.
4. Slide volume potentiometer and frequency switch shafts into their respective holes in the front
cover.
5. Push the chassis assembly completely into the top of the front cover until it settles in place.
6. Be sure the O-ring is properly seated.
7. Snap the bottom of the chassis into the front cover.
EX500 Radio Reassembly — Detailed