LG 49UB8500-UA Service Manual page 94

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Standard Repair Process
LCD TV
symptom
1. Remote control(R/C) operating error
Check R/C itself
Normal
operating?
Operation
Check R/C Operating
Check & Replace
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
Remote control & Local switch checking
Remote control & Local switch checking
☞A22
Check & Repair
Y
Cable connection
Connector solder
N
Baterry of R/C
Y
Normal
Close
operating?
N
Replace R/C
☞A22
Check B+
N
Normal
3.5V
operating?
On Main B/D
Y
☞A18
☞A18
Close
Check 3.5v on Power B/D
(Power B/D don't have problem)
10
Established
2013.01.31
date
Revised date
Revised date
A22
☞A22
Y
Normal
Check IR
Voltage?
Output signal
N
Replace Power B/D or
Replace Main B/D
10/16
10/16
Replace
Main B/D
Y
Normal
Signal?
N
Repair/Replace
IR B/D
LGE Internal Use Only

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