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4-3 Replacement of Control Circuit Board
4-3-1 Removal of Control Box Assembly
1. Remove the screws securing the out panel and take out
the out panel.
2. Disconnect all lead wires from the control box.
3. Remove screws securing the rear of the control box.
4. Push the control box to left side then take out the
control box.
4-3-2 Removal of Main P.C.B Assembly
1. Disconnect all lead wires from the Main P.C.B.
2. Remove screws securing and plastic fasteners of
the Main P.C.B.
4-3-3 Removal of Sub P.C.B Assembly
1. Disconnect all lead wires from the Sub P.C.B.
2. Remove screws securing of the Sub P.C.B..
4-3-4 Removal of Window Display & Membrane Panel
1. Window display should not be disassembled as
its mounting tabs will be broken. If repair work
is difficult, replace with Ass'y control panel.
2. The membrane panel is attached to the
escutcheon base with doublefaced adhesive
tape. Therefore, applying hot air such as using of
hair dryer is recommended for smoother
removal.
3. When installing new membrane panel, make
sure that the surface of escutcheon base is
cleaned sufficiently so that any problems
(shorted contacts or uneven surface) can be avoided.
Membrane panel
Control-box
SCREW
SCREW
