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4-6 Replacement of Control Circuit Board
4-6-1 Removal of Control Box
1. Be sure to ground any static electric charge in your
body and never touch the control circuit.
2. Disconnect the connectors from the control circuit
board.
3. Remove screws securing the control box assembly.
4. Remove the screw securing the ground tail of the
keyboard.
4-6-2 Removal of Ass’y P.C.B
1. Remove screws securing the control circuit board.
2. Lift up the control circuit board from the Ass’y con-
trol box.
4-6-3 Removal of Key Module
1. First, Remove the Assy PCB.
Next, removing the Cover panel tap (6 pieces) in
the Assy Control Box, and then remove the Cover
Panel and Film Lamp.
2. Remove Start button and Dial knob in the Key
Module PCB.
3. Remove screw (1 piece) under a key Module PCB.
4. Lift out key Module PCB to the underside from the
control panel.
5. Remove Film-board from key Module PCB.
CONTROL-BOX
SCREW
SCREWS
ASSY CONTROL-BOX
ASSY PCB
KEY MODULE
PCB
TAP
SCREWS
KEY MODULE
PCB
KEY MODULE
PCB
FILM-BOARD
CONTROL PANEL
COVER-PANEL
START-BUTTON
DIAL KNOB
FILM-LAMP
