LG 42LB700T, Service Manual

Page: 63 / 88

Normal/Motion Remote Controller operating error
Standard Repair Process
Established
date
Revised date
10/13
LCD TV
Error
symptom
2013. 11 .30
2014. 02 .04
D. Function error
Y
1. Normal Remote control(R/C) operating error
Check R/C itself Normal
Check & Repair
Normal Check ST 3 5V
☞ A27
Normal
N
Check IR Normal
Y
☞ A27
Replace
Main B/D
Y
☞
A27
Y
N
Check R/C itself
Operation
Normal
operating?
Normal
Y
Check R/C Operating Check & Replace
Cable connection
Connector solder
Normal
operating?
Check ST 3.5V
On Main B/D
Normal
Voltage?
Check 3.5v on Power B/D
☞
A5
Check IR
Output signal
Normal
Signal?
N
Repair/Replace
IR B/D
N
Y Normal
operating?
Replace R/C
If R/C operate,
Explain the customer
cause is interference
When turn off light
in room
Baterry of R/C
Close
N
Replace Power B/D or
Replace Main B/D
(Power B/D don’t have problem)
IR B/D
Y
from light in room.
2. Motion Remote control operating error
☞ A29
Replace
Main B/D
☞
A29
Y
N
Check Motion R/C
itself Operation
Normal
operating?
Y
Check & Repair
Cable connection
Connector solder
Normal
operating?
Check
3.5V_WOL
On Main B/D
☞ A29
Normal
Voltage?
N
☞
A5
Check B/T
Version
Version
Value OK?
N
Y
N
☞ A29
Y
☞
A29
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)
☞
A5
Repair/Replace
Wi-Fi B/T combo B/D
Normal
operating?
N
Y
If R/C operate,
Replace R/C
Explain the customer
cause is interference
from light in room.
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