LG 32LF550B Service Manual page 48

Standard Repair Process
Error symptom
1. Remote control(R/C) operating error
Check R/C itself Normal
Operation Operating
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.
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Only for training and service purposes
D. Function error
Remote control & Local switch checking
☞A17
Y
Check & Repair
Cable connection
Connector solder
N
Y
Normal
End
Operating
N
Replace R/C
☞A17
N
Normal Check B+ 3.5V
Operating
On Main B/D
Y
☞A4
Check 3.5v on Power B/D
End
Replace Power B/D or
Replace Main B/D
(Power B/D don't have problem)
Established
date
Revised date
☞A17
Y
Normal Check IR
Voltage
Output signal
N
11/14
Replace
Main B/D
Y
Normal
Signal
N
Repair/Replace
IR B/D
LGE Internal Use Only