LG 47LN5700 / 47LN570T / 47LN570Y / 47LN5710 (CHASSIS:LB33B) Service Manual ▷ View online
48 / 88
D. General Function Problem
Remote control & Local switch checking
Y
N
1. Remote control(R/C) operating error
Check R/C itself
Operation
Normal
operating?
Normal
operating?
Y
Close
Replace R/C
If R/C operate,
Explain the customer
cause is interference
from light in room.
Check R/C Operating
When turn off light
in room
Check & Replace
Baterry of R/C
Check & Repair
Cable connection
Connector solder
Connector solder
Normal
operating?
Check B+ 3.5V
On Main B/D
☞A27
Normal
Voltage?
Close
N
N
Check 3.5v on Power B/D
Replace Power B/D or
Replace Main B/D
(Power B/D don’t have problem)
☞A4
Check IR
Output signal
Normal
Signal?
N
Y
Repair/Replace
IR B/D
N
☞A27
Replace
Main B/D
Y
☞A27
Standard Repair Process
Established
date
Revised date
LCD TV
Error
symptom
2012. 12 .06
49 / 88
Check technical
information
- Fix information
- S/W Version
N
Y
Technical
information?
Check
input
signal
Signal
input?
Y
N
External Input and
Component
Recognition error
Check and fix
external device/cable
RGB,HDMI/
DVI, Optical
Recognition error
Replace Main B/D
Replace Main B/D
Fix in
accordance
with technical
information
D. Function error
External device recognition error
Established
date
Revised date
LCD TV
Error
symptom
Standard Repair Process
2012. 12 .06
50 / 88
Check location
of noise
Identify
noise type
Circuit
noise
Replace PSU(with LED driver)
Replace LED driver
Mechanical
noise
Check location of
noise
OR
※
When the nose is severe, replace the module
(For models with fix information, upgrade the S/W or
provide the description)
※
If there is a “Tak Tak” noise from the cabinet,
refer to the KMS fix information and then proceed
as shown in the solution manual
(For models without any fix information, provide
the description)
OR
※
Mechanical noise is a natural
phenomenon, and apply the 1st level
description. When the customer does not
agree, apply the process by stage.
※
※
Describe the basis of the description in
“Part related to nose” in the Owner’s Manual.
E. Noise
Circuit noise, mechanical noise
Established
date
Revised date
LCD TV
Error
symptom
Standard Repair Process
2012. 12 .06
51 / 88
Replace module
Zoom part with
exterior damage
Module
damage
Cabinet
damage
Replace cabinet
Replace remote controller
Remote
controller
damage
Stand
dent
Replace stand
F. Exterior defect
Exterior defect
Adjust VCOM
Established
date
Revised date
LCD TV
Error
symptom
Standard Repair Process
☞A28
2012. 12 .06
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