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LBI-38953
board, and front cap assembly. Refer to the Assembly Dia-
grams located in LBI-38952 when assembling or disassem-
bling the radio or replacing component boards.
Remove power from the radio before servicing.
TO REMOVE THE BOTTOM COVER
1. Remove the four screws securing the bottom cover to
the radio.
2. Gently lift the bottom cover from the radio.
TO REMOVE THE TOP COVER
1. Remove the bottom cover and slide the top cover up out
of the casting.
TO REMOVE THE DUPLEXER ASSEMBLY
1. Remove the radio bottom cover.
2. Next, remove the single M3.0-0.8 X 20 (#10 drive)
TORX screw that secures the duplexer assembly to the
casting. This screw is located on the rear of the radio.
3. Disconnect the SMB connectors from the TX and RX
inputs of the duplexer and the TNC connector from the
ANT port of the duplexer. The duplexer can now be
removed.
Servicing the radio while the duplexer is not prop-
erly secured may cause electrical shorts. Special
care must be taken to ensure that the duplexer does
not make contact with any circuitry while power is
being supplied to the radio.
TO REMOVE THE RF BOARD A2
l.
Remove the top and bottom covers from the radio. Then,
remove the duplexer assembly (refer to the procedures
above).
4
NOTE
NOTE
2. Pry off the friction fit covers covering the RF board.
3. Gently pry interconnect plug P702 from the logic and
RF boards using a small standard screwdriver.
4. Remove the two clips securing Q101 and U102 to the
frame (on top side of board).
5. Remove the two M3.5-0.6 x 20 TORX screws (#15
drive) securing PA module U101 to the frame.
6. Remove the six M3.5-0.6 x 8 TORX screws (#15 drive)
from the bottom side of the board.
7. Disconnect wires attached to J105, J704, J705 and ca-
bles going to the duplexer interface board.
8. Remove the six spring clips protruding through the RF
board from the bottom side.
9. Gently push the RF board out of the radio casting.
TO REMOVE THE AUDIO BOARD A3
1. Pull out the black clip protruding through the Audio
Board which holds the Logic Board 5-volt regulator
against the casting.
2. Remove the four M3.5-0.6 x 8 TORX screws (#15 drive)
securing the Audio Board to the radio. Pry out the board
using a screwdriver in the hole previously occupied by
the clip.
TO REMOVE THE FRONT CAP
ASSEMBLY
l.
Remove the top and bottom covers of the radio.
2. Remove the four TORX screws (#15 drive) from the
front cap assembly.
3. Gently pull the front cap assembly away from the radio.
TO REMOVE THE AUDIO AMPLIFIER
BOARD A9
1. Remove front cap assembly.
2. Remove the four M3.5-0.6 x 8 TORX screws (#15 drive)
securing the audio amplifier board to the radio casting.
Gently pull board away from the casting.
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