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3. Disassembly and Reassembly
3-2 Replacement of Control Circuit Board
Parts
Explanation Photo
Explanation
Removal of
Control Box
Assembly
1.
Disconnect power and remove Grille.
2.
Be sure to ground any static electric charge in
your body and never touch the control circuit.
3.
Remove a screw securing the control box
assembly.
4.
Remove the earth screw and disconnect the
connectors from the control circuit board.
Make sure to note the positions of the
connectors for replacement.
Removal of
P.C.B Assembly
1.
Take out the Knob Dial.
2.
Remove screw securing the Cover-PCB and
take out the Cover-PCB.
3.
Pull the lever end of the plastic fastener and
remove the Flexible Printed Circuit(FPC) of
membrane panel.
4.
Remove screws(4) securing the Main control
circuit board(Main PBA).
5.
Lift up the control circuit board(Main PBA) from
the Ass’y control box.
6.
Remove screws(4) securing the Display
control circuit board(Display PBA).
7.
Lift up the control circuit board(Display PBA)
from the Ass’y control box.
8.
When reconnecting the FPC connector, make
sure that the holes on the connector are
properly engaged with the hooks on the Plastic
Fastener.
After reconnecting the connectors, make sure that
the connectors are connected securely on the
terminal of control circuit board by pulling the wires
lightly.
