LBI-39181
7
TO SEPARATE THE CENTER BOARD
FROM THE FRONT BOARD
1. Observe that a flexible ribbon cable connects the center
board to the front board. To detach this cable, with the
case front still face down on the table and the cable
entry still toward you, carefully unsolder the tabbed
leads.
2.
Rotate the case front so the voice entry port is toward
you. Use the two cylindrical posts at diagonal corners of
the board to lift the center board away from the front
board. The flat blade of a small screwdriver, inserted
under the board edge near the voice entry port, may be
used to aid in carefully prying the center board (which
is now uppermost) away from the front board.
Back-to-back connectors on the side of the center board
opposite the push-to-talk switch attach to the rear and
front boards. When pried up, the center board will
detach at this connector.
The orange lead from the push-to-talk switch is
connected to the center board. To complete separation
of the center board, unsolder the orange lead at the leaf
switch.
3.
Lift the center pc board out of the case.
TO REMOVE THE FRONT BOARD FROM
THE CASE
1.
Remove the two flat-head Phillips screws, one from
each side of the board.
2.
Remove the insulator around the base of the flexible
cable. Thread the cable through the slot in the board.
Lift the board free of the case, carefully sliding the
whole length of the flexible cable through the slot.
TO CONCLUDE DISASSEMBLY OF THE
MICROPHONE
The membrane switch assembly and keypad can now be
lifted out of the case.
1.
To free the rear board from the case back, unsolder the
leads from the hang-up button and leaf switch terminals.
2.
To remove the leaf switch assembly, remove the two
Phillips-head screws that attach it to the case back.
TO REASSEMBLE THE 344A4611
Reassemble the microphone by reversing the steps of
disassembly. Figure 6 shows the configuration of connectors
between the front, center, and rear boards in the
microphone.
Figure 6 - Connector Detail Between Boards
TO REPLACE THE MICROPHONE
CARTRIDGE
1.
Remove the flexible black resonator from the cartridge
on the rear board.
2.
Unsolder the three cartridge terminals from the board
and detach the cartridge from the board.
3.
Insert the new cartridge terminals in the board with the
single (ground) terminal in the hole closest to the edge
of the board and the other two terminals (with the
insulator connecting them together) toward the center of
the board. Insert the terminals until the posts on the
front of the cartridge body stop at the board surface.
4.
Carefully solder the new cartridge terminals to the
board.
5.
Replace the black resonator on the cartridge with its
long flat edge parallel to the rear of the board.
