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Standard Repair Process
Error
LED LCD TV
symptom
1. Remote control(R/C) operating error
Check R/C itself
Normal
operating?
Operation
N
Check R/C Operating
Check & Replace
When turn off light
Baterry of R/C
in room
If R/C operate,
Explain the customer
cause is interference
from light in room.
Replace R/C
2. Local(Mechanical) switch operating error
Y
Check R/C
Normal
operating?
Operation
N
Move
Power problem
Section
D. General Function Problem
Remote control & Local switch checking
☞A25
Check & Repair
Y
Cable connection
Connector solder
Normal
Close
operating?
N
Check & Repair
Normal
Cable connection
operating?
Connector solder
☞A25
N
Normal
Check B+ 5V
operating?
On Main B/D
Y
☞A21
Close
(Power B/D don't have problem)
Check & Replace
N
Assembly status
(Key PCB + tool )
Y
Close
10
Established
2009 . 7. 29
date
2009. 9 .01
Revised date
☞A25
Y
Normal
Check IR
Voltage?
Output signal
N
Check 5v on Power B/D
Replace Power B/D or
Replace Main B/D
N
Normal
Check Key
operating?
Output signal
Y
Close
ⓒ LG Electronics. Inc.2009
Electronics 6-3
10/13
Replace
Main B/D
Y
Normal
Signal?
N
Repair/Replace
IR B/D
Replace
Main B/D
Y
Normal
Signal?
N
Repair/Replace
Local switch B/D
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