Samsung RS2534WW Service Manual page 55

Diagnostics
11-9) If the lamps of freezer / refrigerator fail in lighting:
Caution!
1. When you are exchanging the lamp of freezer, please exchange or troubleshoot it with the power OFF to
avoid an electric shock.
2. Please keep in mind you do not get burnt by the excessive heating of an incandescent light bulb.
How to check :
Separate the door S/W and measure its
resistance with a measure. As the result,
every Open/Close of the door S/W should turn 0/
∞, respectively.
1) Where 0 alone comes out : Door S/W has Short
trouble.
2) Where ∞ alone comes out : Door S/W has
Open trouble.
Reference
If the door is opened, then the contact of door S/W is opened and MICOM gets applied 5V to finally sense Open. If 5V has been sensed over two
minutes afterwards, then an Door-Open alarm will sound 'Ding-Dong' for 10 seconds in a one-minute cycle. For that reason, if the door S/W has failure, the
refrigerator can make a "Ding-Dong" sound per a one-minute cycle. Please note step for its service!
Start
Is the inside lamp's filament cut?
NO
Does the F-door S/W
have a normal contact?
YES
Check the connections of F and R-door S/W;
check and troubleshoot the inside lamp socket.
55
YES
Exchange or troubleshoot the
inside lamp.
NO
Exchange or troubleshoot the
door S/W