LBI-33057
6
If necessary, the RF Board can be separated from the
eggcrate casting. Remove the two (2) Torx screws that
secure the Power Amplifier Module and remove the four
(4) screws on the chip component side of the board that
secure it to the casting.
Reassemble the unit in reverse order. Observe screw
lengths.
CONTROL BOARD ACCESS
To gain partial access to the Control Board, remove
the five (5) screws (D) securing the shield and board. An
earlier Front Cover Assembly has an additional screw lo-
cated just below connectors J4/P4 (DD). See Figure 3.
Remove the shield.
Many of the test points on the Control Board are ac-
cessible at this point; however, the Front Cover Assembly
should not be powered-up without first reinstalling the
screw into the lower right-hand hole to ground the board.
Also, the three (3) screws securing the top flex connec-
tors need to be reinstalled for good flex connections. USE
Figure 3 - Control Board Access
CAUTION: Installation of screws that are longer than
the originals may damage the LCD Board, flex circuits or
the threads.
To remove the Control Board, remove the Torx
screw (E) in the lower left-hand corner that supplies bat-
tery power to the board. An earlier Front Cover Assembly
has an additional screw located just below connectors
J1/PI (EE). Lift the board and carefully unplug Speaker
Flex plug P3 from J3 on the Control Board. Avoid bend-
ing this or any other flex circuits at sharp angles. The
Control Board can now be removed. Note the battery
power and ground
connections at the bottom of the board
where the screws have been removed.
SPEAKER, MICROPHONE AND FLEX
CIRCUIT ACCESS
Remove the Control Board as previously stated and
then remove the six (6) Torx screws that secure the die-
cast shield. Remove the die-cast shield by lifting the top
end first and sliding it towards the top of the radio. The
internal speaker, microphone, Keypad and UDC Flex cir-
cuits are now partially accessible. See Figure 4.
Figure 4 - Speaker, Microphone and Flex Circuit Access
