TH-K4AT/K4E
4
Special care and attention required for assembly
1. Gluing to the key top (MIC element section)
You must also glue on the speaker storage area and heap
the glue up until wealthy glued on the speaker storage area
and the key top for waterproofing the MIC element side of
the key top. (Fig. 1)
Fig. 1
2. Bending the LCD hardware fixture (J21-8456-03) tabs
(1) Insert the tabs of the LCD hardware fixture into four holes
in the LCD installing position of the TX-RX PCB (TX-RX unit
A/3). (Fig. 2)
Heap the glue up until wealthy glued on the speaker
storage area and the key top (MIC element section).
Fig. 2
(2) By pressing the LCD hardware fixture from the component
side of the TX-RX PCB, you must bent all 4 tabs of the LCD
hardware fixture being visible from the foil side until the
bases of each tabs are folded at least 45 degrees (Fig. 3). If
the bending angle of the tabs of the LCD hardware fixture
is less than 45 degrees, a display error may occur.
Bending position
NG
NG
Min 45
degrees
3. PTT PCB (TX-RX unit C/3) installation procedure
Installing the PTT PCB on the TX-RX PCB and chassis are
as follows:
(1) Insert the PTT PCB connector (CN7) into the TX-RX PCB
connector (CN6) lightly.
(2) Push three parts of the PTT PCB to contact tightly with the
chassis. There may be a small gap between the connectors.
(Fig. 4)
Note:
A double-side adhesive tape (J99-0376-04) is used
behind the PTT switch. When reassembling the PTT
PCB to the chassis, press the PTT PCB (under the PTT
switch) so that the tape hold the PCB and chassis
securely.
Fig. 3
CN6
Chassis
PTT switch
PTT PCB (C/3)
OK
A bit
clearance
No
clearance
NG
CN6
CN7
CN7
Chassis
PTT PCB (C/3)
PTT switch
Fig. 4
Push three parts of the PTT PCB
to contact tightly with the chassis.
(3) Tighten one screw in the PTT PCB.
DISASSEMBLY FOR REPAIR
