Samsung RS68N Series Service Manual page 89

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PRECAUTIONS(SAFETY WARNINGS)
4-5-7. When the internal lamp of the freezer/fridge does not light up
Model with light bulb applied
Caution
1. Turn off the power for repair because there is risk of electric shock when replacing the internal lamp.
2. Please keep in mind you could get burnt by the excessive heating of an incandescent light bulb.
Reference
Internal lamp RELAY switches ON/OFF as the DOOR is OPEN/CLOSE.
When the internal lamp is not on, check the operating noise of the RELAY.
RELAY operation noise is generated every time as the DOOR is OPEN/CLOSE.
Reference
1. When the DOOR is open, the DOOR S/W becomes OPEN. Micom senses 5V from Door S/W and recognizes that
the Door is open. If 5V has sensed for more than 2 minutes, buzzer will sounds "DingDong" every 1 minute.
Therefore, if the DOOR S/W is defective, it can generate the "Ding Dong" sound every 1 minute.
2. ON/OFF control of the internal lamp is linked with the DOOR S/W.
Start
Is it a light bulb?
YES
Is the filament of
the intermal lamp blown?
NO
Is the Door and
Home bar Reed S/W operating normally?
YES
Relay for lamp
control on PBA is normal?
YES
Check and repair F, R-DOOR, home bar
S/W connector and socket for internal
lamp
<Light bulb control method>
Model with light bulb applied
NO(LED LAMP)
YES
Replace lamp
NO
Check REED S/W or check
whether door and home
bar switch normally
NO
Replace PBA and Relay
Fridge internal lamp
On : Fridge door is open or
Fridge HomBar is open
89
Reed S/W : Open when
※
door is open Short when
door is closed
Is the Reed S/W operating
normally?
YES
Check REED S/W or check
whether door and home bar are
Is the output
of LED-LAMP 12V when
Door is open?
Check wire disconnection, check
YES
Measure voltage between CN76 #1 and #2 when opening
Measure voltage between CN76 #3 and #5 when
opening the R-Door
Replace LED LAMP PBA
Freezer internal lamp
On : Freezer door is open or
Freezer HomBar is open
NO
switching normally
NO
DC 12V output
the F-Door