LG 42LB5800-SB - Page 54

D. General Function Problem
Established
dt
Error
2014 1 2
Standard Repair Process
Remote control & Local switch checking
1. Remote control(R/C) operating error
Replace
Main B/D
d
a
t
e
Revised date
10/13
LCD TV
Error
symptom
2014
.
1
.
2
Y
N
Check R/C itself
Operation
Normal
operating?
Y
Check & Repair
Cable connection
Connector solder
Normal
operating?
Check B+ 3.5V
On Main B/D
☞
A
27
Normal
Voltage?
N
Check IR
Output signal
Normal
Signal?
N
Y
N
☞A27
Y
☞A27
Y
Check R/C Operating
When turn off light
in room
Check & Replace
Baterry of R/C
Close
Check 3.5v on Power B/D
Replace Power B/D or
Replace Main B/D
(Power B/D don’t have problem)
☞
A
4
N
Repair/Replace
IR B/D
N
Normal
operating?
Close
Re
p
lace R/C
If R/C operate,
Explain the customer
cause is interference
from light in room.
N
p
12 / 97
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