Remote Control & Local Switch Checking - LG 42LB5800 Service Manual

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. General Function Problem
Error Error
Remote control & Local switch checking
☞A27
Check & Repair
Y
Cable connection
Connector solder
N
Baterry of R/C
Normal
Close
operating?
N
Replace R/C p
☞A27
N
Normal Check B+ 3.5V
operating?
On Main B/D
Y Y
☞A4
Close
Check 3.5v on Power B/D
(Power B/D don't have problem)
12 / 97
Established
2014.1.2 2014 1 2
date d t
Revised date
☞A27
Y
Normal Check IR
Voltage?
Output signal
N N
Replace Power B/D or
Replace Main B/D
10/13
Replace
Main B/D
Y
Normal
Signal?
N N
Repair/Replace
IR B/D
LGE Internal Use Only