LG 55LM9600 Service Manual page 80

Standard Repair Process
LCD TV
1. Remote control(R/C) operating error
Check R/C itself
operating?
Operation
Check R/C Operating
When turn off light
in room
If R/C operate,
Explain the customer
cause is interference
from light in room.
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Only for training and service purposes
D. Function error
Error
symptom
Remote control & Local switch checking
☞A27
Check & Repair
Normal Y
Cable connection
Connector solder
N
Check & Replace
Baterry of R/C
Y
Normal
Close
operating?
N
Replace R/C
☞A27
Check B+
N
Normal
3.5V
operating?
On Main B/D
Y
☞A4
Close
Check 3.5v on Power B/D
Replace Power B/D or
Replace Main B/D
(Power B/D don't have problem)
10
Established
2012.01.16
date
Revised date
☞A27
Y
Normal Check IR
Voltage?
Output signal
N
Repair/Replace
10/15
Replace
Main B/D
Y
Normal
Signal?
N
IR B/D
LGE Internal Use Only