Samsung RS257BABB Service Manual page 50

Diagnostics
3) Without sound of buzzer operation
This model is equipped with a buzzer in Panel PCB.
When there is no buzzer sound with button input, forced operation or door open, disassemble Panel PCB and check if the
buzzer is broken or soldering is defective.
It is difficult to repair Panel PCB because it consists of SMD components. When it is not a repairable defect regarding button
press or minor scratch, it is recommended to change the Ass'y.
Start
Does a "Ding Dong" sound come out when
a button on the front panel is pressed?
NO
Does a door open warning sound come out
when any of F/R-Doors remains open
over 2 minutes?
NO
Is the buzzer on Panel PCB broken or bent?
NO
Does lead on the buzzer vibration panel come off?
NO
Check the button pressing power & its
mechanism
YES
Main PCB Normal, Buzzer Normal
YES
Refer to "How to Check Panel
Display" and check Panel PCB
YES
Buzzer Breakage - Replace
YES
Replace Buzzer or Panel PCB
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