General Function Problem - LG 55LW5700 Service Manual

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.
Copyright ⓒ 2011 LG Electronics. Inc. All right reserved.
Only for training and service purposes
D. General Function Problem
Error
symptom
Remote control & Local switch checking
☞A27
Check & Repair
Normal Y
Cable connection
Connector solder
N
Check & Replace
Baterry of R/C
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
2010. 12 .14
date
Revised date
☞A27
Y
Normal Check IR
Voltage?
Output signal
N
Repair/Replace
ⓒ LG Electronics. Inc.2009
10/13
Replace
Main B/D
Y
Normal
Signal?
N
IR B/D
LGE Internal Use Only