Samsung RS257BABB Service Guide - Page 54

If the, lamps of freezer / refrigerator fail in lighting, Caution

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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. Start Is the inside lamp's filament cut? YES 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. NO 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. Exchange or troubleshoot the inside lamp. Exchange or troubleshoot the door S/W 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! 54

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54
Diagnostics
11-9) If the
lamps of freezer / refrigerator fail in lighting:
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.
Is the inside lamp’s filament cut?
Start
Exchange or troubleshoot the
inside lamp.
Does the F-door S/W
have a normal contact?
Exchange or troubleshoot the
door S/W
Check the connections of F and R-door S/W;
check and troubleshoot the inside lamp socket.
YES
NO
NO
YES
Caution!
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.
How to check :
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!
Reference