3-12 MAINTENANCE
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.
8. Reassemble the knobs, dust cover, antenna, and battery.
8.0 Option Board Installation
1. With the keypad retainer removed, the keypad backer board can be removed without the use
of tools.
2. Remove the jumper flex from the connector on the keypad board. Notice the orientation of the
flex to the connector. Arrows on the jumper flex point to the correct way of inserting the flex
into the connector.
3. Discard the keypad backer board.
4. The “breakaway” tab at the top of all option boards contains an extra row of keys and is used
to accommodate other radio models.
5. Break-off and discard the option board tab, taking care not to damage the option board. Trim
any tab fragments that may remain on the option board.
Figure 3-11 Fastening the Chassis
Radio Chassis
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