When The Light Dosen’t Come On In The Refrigerator - Samsung SR-L677EV Service Manual

Reference
1. Is the power cord well connected to wall outlet?
2. Be careful of high-voltage discharge because high voltage DC power is supplied to SUB-PCB.
6-5) When the light dosen't come on in the refrigerator
Is door switch normal?
Exchange LAMP
Start
Y
Is main pcb relay
normal(RY75)?
Y
Is power suppling to
SUB PCB input?
Is power suppling to
DC part C2 of rectifier?
Fluorescent LAMP
normal?
Exchange SUB PCB
N
Replace door switch, check main wire
N
Check relay, exchange main pcb
Fluorescent LAMP(SUB PCB)
N
Check connector and wire
Y
N
Check SUB PCB power input
Y
N
Exchange LAMP
Y
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