Standard Repair Process Detail Technical Manual
IR Cable operation checking method
C. Function error
A
14
Established
date
Revised
date
A
14
Error symptom
Content
Checking order
1. Check IR cable condition between IR & Main board
2. Check the stand-by 3.5V on the terminal M1.
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.
JK6021
M7
GND
M4
+3.5V_ST
M3
NC
M1
IR
M6
EYE_SCL
M5
EYE_SDA
JK4100
Copyright
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2020 LG Electronics Inc. All rights reserved.
Only training and service purposes.
Summary of Contents for 75UH5F
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