90
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.
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.
Start
Operate the COMP manually
and re-check
Is the COMP working?
No
MAIN PCB failure -
Replace
No
MAIN PCB failure - Replace IC75
failure
No
No
Normal Operation
[Option] Stop lighting when R
door opens.
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.
No
Yes
Yes
Yes
Yes
Yes
Does MAIN PCB IC75 #1 have
about 5V of input voltage?
Does MAIN PCB IC75 #18 have
about 0.7V of input voltage?
Does the Photosynthetic LED
lamp light up when the FF door
open?
Does the Photosynthetic LED
lamp work with the FF door
closed?
MICOM State
MICOM(#116) or IC75#1
Operate 5V (High)
Stand by 0V (Low)
IC75#1
Operate 0.7V (Low)
Stand by 11~13V (High)
Check by pressing the Door
Switch
Photosynthesis LED Lamp is
always on when the COMP
operates. Please operate the
COMP manually prior to check
the photosynthetic LED Lamp
Reference 2
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