Disassembly/Assembly
57
Chassis Assembly
Reassembly
Before you assemble the main board to the chassis, make sure that the following
steps are done to the chassis.
1. Replace the O-ring. The tabs on the O-ring should reach into the chassis and
point down.
2. 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.
3. Replace the battery contact seal (if necessary) surrounding the battery
contact.
NOTE: Be sure the battery contact seal protrudes through the chassis and
is not pinched under the chassis.
4. Make sure the thermal pad is placed on top of the RF Power Amplifier on the
main board.
5. Use the notch in the bottom of the main board and the protrusion at the
bottom of the casting to align the board to the casting. Place the board against
the casting. Make sure that the five screw holes are aligned.
6. Place the main shield assembly on the main board. Again, make sure that the
five screw holes are aligned.
7. Use the TORX T7-IP screwdriver to fasten the screws holding the main board
and shield to the chassis. Do not over torque. Torque limit is 4 inch-lbs.
8. Place the O-ring at the antenna connector over the antenna connector
bushing.
Backup Battery
Reassembly
1. Insert the backup battery (positive side up) into the battery holder, as shown in
Figure 39.
2. Replace the retaining clip by sliding it into its recess on the board.
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 chassis assembly.
Figure 39. Reassemble the Backup Battery
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