LG 49VM5C Service Manual page 49

Standard Repair Process Detail Technical Manual
symptom
Signage Monitor
Content
[55VH7B/55VM5B/49VM5C Models]
Checking order
1. Check IR cable condition between IR & Main board
2. Check the stand-by 3.5V on the terminal M3.
3. When checking the Pre-Amp when the power is in ON condition, it is normal when the Analog
Tester needle moves slowly, and defective when it does not move at all.
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Only for training and service purposes
Error
D. Function error_ No response in remote control,
key error
remote control operation checking method
JK101
A10
Established
date
Revised
date
JK101
M1 IR
M2 NC
M3
+3.5V_ST
LGE Internal Use Only