Samsung MG23J5133AK Service Manual page 23

4. Troubleshooting
4-4-2 If button malfunction
Buttons of the control panel do not work.
Are button pressed
in the correct order?
YES
Is the
connector of the
control panel
normal?
YES
Replace PCB.
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NO
Refer to User Manual
Tact type
NO
Menbrane type
PCB
Membrane
Switch
*Inspection method
Tact Switch & PCB
Connector
23
Connector
Connector