Samsung RS68N Series Service Manual page 85

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PRECAUTIONS(SAFETY WARNINGS)
4-5-4. When Alarm Sound continues (Buzzer Sound)
1) When "DingDong" sound continues
F-Door sensing : CN50 #6-#5
R-Door sensing : CN50 #7-#5
Nomal State
-Door Open : 5 Vdc
-Door Close : 0 Vdc
Separate the Door S/W
and check its resistance
change according to s/w
on(0Ω) and off(∞Ω)
2) When "Beeping" sound continues
Start
Door is closed
completely?
Closed well
Is water penetrated into
the door switch?
NO
Door sensing
voltage changes as the door gets
open or closed.
YES
The connector(CN50) is
Inserted properly
YES
Door S/W is good.
YES
MAIN PBA & DOOR S/W are good
Start
Forced Operation
or Forced Defrost is
selected
NO
After plugging
in again, it sounds
continuously
YES
Replace Panel PBA
85
Door is ajar
Romove causes after
comprehending the condition of
interference by door gasket or food
etc.
YES
Replace Door switch.
NO
Repair wire connection and door switch.
NO
Repair the defective contact
of the connector or insert
the connector properly.
NO
Replace REED S/W.
YES
Cancel Forced Operation or Forced
Defrost, or Re-plug the unit
NO
Panel PBA is normal