96
TROUBLESHOOTING
4-2-11. When refrigerator ROOM Lamp does not light up
When controlling the regrigerator light with Regulator(12V) : LED LAMP
→
Applying to the F/R Room compartment (Option)
* If the Vegetable Lamp does not work properly, check the R compartment LED Lamp because it is connected with
the R compartment LED Lamp in parallel. Refer to the circuit diagram to repair.
Start
Check/Replace REED S/W,
Magnet ASS
`
Y
Does the
DOOR S/W sense properly?
(Open/Close)
No
Replace/Repair the PCB
No
Replace/Rep air the PCB.
Repair IC76
No
Check the connector terminal
Replace PCB
No
Check the
connector terminal
No
Replace LED LAMP
Normal
1) Measuring output voltage
- Measuring the voltage of PCB typical Ground J23 JUMMPER and IC76
voltage( CN78-"3"(Red)/R LED), IC77 voltage (CN78-"1"(Brown)/F LED)
Checking method of Door switch voltage.
- Measuring voltage of CN76-"12")(Purple)
↔
PCB
typical Ground J23 JUMMPER
PCB Typical Ground J23
JUMMPER
R LED Lamp ON
Close
No
Check the wire
Re-insert the connector
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Is the output
voltage of IC01 MICOM #28
normal?
Is the output
voltage of IC76
normal?
Is the MAIN
PCB connector(CN78) inserted
properly?
Does the MAIN
PCB connector(CN78) output properly?
(11~12V)
Is the LED LAMP
connected properly?
Is the LED LAMP no mal?
R LED Lamp OF
Open
Door & MICOM State
Door
MICOM(#28)
Right and Left
Close
0V(Low)
Open
5V(High)
MICOM State
Door
FF
FZ(MID)
#28
#29(#40)
Close
0V(Low)
0V(Low)
Open
5V(High)
5V(High)
IC76(R)/IC77(F) State
IC
IC76(R) / IC77(F) / IC78(MID)
0V(Low)
0V(Low)
5V(High)
11~12V(High)