70
TROUBLESHOOTING
4-2-10. When refrigerator ROOM Lamp does not light up
1. When you replace the lamp of freezer, please power OFF to avoid an electric shock.
2. Please keep in mind you could get burnt by the excessive heating of an incandescent light bulb.
3. Bimetal is installed in the refrigerator LAMP. Check that if LAMP may be OFF by bimetal.
The case of fresh food compartment(room) lamp will be explained only.
Because it is possible to repair the other room lamps with the same method.
Start
Is the inside lamp
filament cut?
Is Lamp OFF by
bimetal operating?
Is the connection
point of R-door switch
normal?
Is the control relay
of the inside lamp in PCB
normal?(RY76)
Repair the inside lamp
Fresh food compartment
Lamp is applied only.
Repair door switch
Replace PCB and
Replace Relay
Check the connection of RDoor
switch and repair the inside lamp
socket
Reference
* The interior lamp relay operates lighting/lightout
according to door open / close.
* If interior lamp does not light, check the noise of relay
operation.
* Noise of relay operation sounds every Door Open /
Close.
* F-LAMP Relay -- RY75
* R-LAMP Relay -- RY76
Reference
If the door is opened, the contact of door switch will be opened and MICOM will get applied 5V to finally sense Open.
If 5V has been sensed over two minutes afterwards, Door-Open alarm will sound Ding-Dong for 10 seconds in a oneminute cycle. For
that reason, if the door switch has failure, the refrigerator can make a Ding-Dong sound per a oneminute cycle. Please note the step
for its service.
Wait for returning time
of bimetal
When measure lamp resistance to the Wire
Resistance can be changed by Lamp input voltage.
(Actual measurement is below, it can be changed by
performance)
Checking method of Door Switch voltage
- Measuring voltage of Sensor Check Point #5(IC01 MICOM #58) on
PCB or CN30#8(White-black)
CN75#1(Gray)
- Compare time table after measuring
Measuring voltage of CN30#8(white-black) CN75#1(Gray) are below
Fresh food
compartment lamp
CN70#1(Red)
CN71#1 (Blue) ;
10(33)Ohm 3 Ohm
Lamp ; 60W + 60W
Freezer
compartment lamp
CN70#1(Red)
CN71#3 (Purple) ;
15(66)Ohm 5 Ohm
Lamp ; 60W
typical PCB Ground CN10#3"(Black)
Door & MICOM State
Door
F
MICOM
(#50)
Close
Open
5V(High)
0V(Low)
0V(Low)
5V(High)
R MICOM(#3)
Right and Left
Summary of Contents for RF265AB
Page 17: ...18 Refrigerator PRODUCT SPECIFICATIONS 2 9 Cooling Air Circulation Freezer ...
Page 73: ...74 EXPLODED VIEW PARTS LIST 5 1 Freezer 19 20 20 4 20 3 20 4 20 2 20 1 ...
Page 76: ...77 EXPLODED VIEW PARTS LIST 5 2 Refrigerator ...
Page 80: ...81 EXPLODED VIEW PARTS LIST 5 3 Cabinet 38 ...
Page 84: ...85 EXPLODED VIEW PARTS LIST 5 4 Disassembly of Freeze Door ...
Page 87: ...88 EXPLODED VIEW PARTS LIST 5 5 Disassembly of Refrigerator DoorLeft ...
Page 90: ...91 EXPLODED VIEW PARTS LIST 5 6 Disassembly of Refrigerator Door Right ...
Page 98: ...99 7 WIRING DIAGRAM SCHEMATIC 7 1 Model RF266 100 7 2 Model RF265 101 ...
Page 101: ...102 8 CIRCUIT PLAN 8 1 Whole block diagram 103 8 2 CIRCUIT DIAGRAM 105 ...
Page 102: ...103 8 1 Whole block diagram 8 Shematic Diagram AC115V AC115V AC115V 8 1 1 MODEL RF266 BETTER ...
Page 103: ...104 Shematic Diagram AC115V AC115V AC115V 8 1 2 MODEL RF265 GOOD ...
Page 104: ...105 8 2 CIRCUIT DIAGRAM Shematic Diagram 8 2 1 Sheet 1 of 2 ...
Page 105: ...106 8 2 CIRCUIT DIAGRAM Shematic Diagram 8 2 2 Sheet 2 of 2 ...