4-2-12) When The Room Lamp (Led) Does Not Light Up - Samsung RL60GG Series Service Manual

4. TROUBLESHOOTING

4-2-12) When the Room Lamp (LED) does not light up

When the Room Lamp is controlled with a 12V Regulator (Ex. Fridge LED LAMP)
→ It is used in the Fridge (Option)
Door & MICOM State
MICOM(#34)
Door
Right and Left
Close
Open
MICOM State
Door
(Right and Left)
Close
Open
IC74(R)
Micom CN72 3,4Pin
0V(Low)
5V(High) 10~12V(High)
0V(Low)
5V(High)
R
#53
0V(Low)
5V(High)
0V(Low)
Start
DOOR S/W works
normal (Open/Close)
Yes
IC10 MICOM #34 Output
Voltage is normal
Yes
IC72 #3 & #4
Output is normal
Yes
Voltage Output at the
MAIN PCB Connector
(CN76) is normal (10~12V)
Yes
The LED Lamp is
connected properly
Yes
The LED Lamp is ok
Yes
Normal
66
No
Check & Replace REED S/W
& Magnet Ass'y
No
Replace / Repair PCB
No
Replace PCB
No
Check Connector Terminal /
Replace PCB
No
Check Connector Terminal
No
Replace LED LAMP