If Photosynthetic Led Lamp Does Not Work Properly; If Photosynthetic Led Lamp Does Not Work Properly - Samsung RFG298AA Service Manual

TROUBLESHOOTING

4-2-16. If Photosynthetic LED Lamp does not work properly

Sears model Option
* Please check the Power prior to repair, even though DC power does not cause electric shock.
This lamp operates related to COMP operation, please check the COMP first.
Photosynthesis LED Lamp is
always on when the COMP
operates. Please operate the
COMP manually prior to check
the photosynthetic LED Lamp
MICOM State
MICOM(#116) or IC75#1
Operate
Stand by
IC75#1
Operate
Stand by
[Option] Stop lighting when R
door opens.
Check by pressing the Door
Switch
Reference 2
Remove the Photosynthetic LED lamp cover from the rear wall of Veg. Pan and connect battery to check the lamp operation.
1) Contact + of 9V battery onto #1 and - of 9V battery onto #3. Check whether LED light up. When the battery contacting time is
longer, LED can be broken. Please contact it momentarily and just check the lighting.
- If LED doesn't light up, you are recommended to replace the whole photosynthetic LED ASS'Y.
Does MAIN PCB IC75 #1 have
5V (High)
0V (Low)
Does MAIN PCB IC75 #18 have
0.7V (Low)
11~13V (High)
lamp light up when the FF door
Start
No
Is the COMP working?
Yes
No
about 5V of input voltage?
Yes
No
about 0.7V of input voltage?
Yes
Does the Photosynthetic LED No
open?
Yes
Does the Photosynthetic LED No
lamp work with the FF door
closed?
Yes
Normal Operation
94
Operate the COMP manually
and re-check
MAIN PCB failure -
Replace
MAIN PCB failure - Replace IC75
failure
Remove the photosynthetic LED lamp cover and
follow to the Reference2 to check any failure.
Remove the photosynthetic LED lamp cover and
follow to the Reference2 to check any failure.