4-2-11) When The Room Lamp (Led) Does Not Light Up - Samsung RB31FEJNB Series Service Manual

4. TROUBLESHOOTING
4-2-12) When the Room Lamp (LED) does not light up
Door & MICOM State
DOOR S/W
Right and Left
Close
Open
MICOM State
Door (Fridge)
Close
Open
Q712(R)
Micom CN76 #2, #4 Pin
0V(Low)
5V(High) 10~12V(High)
MICOM(#22)
0V(Low)
5V(High)
R
#22
0V(Low)
5V(High)
0V(Low)
Start
DOOR S/W works
normal (Open/Close)
Yes
IC10 MICOM #43 Output
Voltage is normal
Yes
Voltage Output at Pin
#2 & #4 (CN76) 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
76
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