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4-6 Replacement of Control Circuit Board
4-6-1 Removal of Control Box Assembly
1. Disconnect the connectors from the control box
assembly.
2. Remove screws securing the control box assembly.
3. Remove the knobs of the control box A’ssy.
4. Remove the screw securing the timer.
CONTROL-BOX
SCREW
4-6-2 Removal of Ass’y P.C.B Assembly
1. Remove screws securing the control circuit
board
2. Lift up the control circuit board from the Ass’y
control box.
Screw
4-6-3 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 key board is attached to the
escutcheon base with double faced adhesive tape.
Therefore, applying hot air such as using of hair dryer
is recommended for smoother removal.
3. When installing new membrane key board, 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
