LG 32LV3700-ZC / 32LV370S / 32LV375G-ZC / 32LV375S-ZC / 32LV375W-ZC (CHASSIS:LD12B) Service Manual ▷ View online
→ Wrecked audio/discontinuation/noise is same after “Check input signal” compared to No audio
Established
date
date
Electronics 6-3
Standard Repair Process
Revised date
2008. 2 . 1
LCD TV
C. Audio error
Wrecked audio/discontinuation/noise
9/13
Wrecked audio/
Discontinuation/
Noise for
all audio
Check and replace
speaker and
connector
speaker and
connector
Wrecked audio/
Discontinuation/
Noise only
for D-TV
Wrecked audio/
Discontinuation/
Noise only
for Analog
Wrecked audio/
Discontinuation/
Noise only
for External Input
Connect and check
other external
device
other external
device
N
Y
Normal
audio?
Check and fix external device
Replace Power B/D
N
Y
Normal
voltage?
Check input
signal
-RF
-External Input
signal
signal
-RF
-External Input
signal
Signal
normal?
(When RF signal is not
received)
Request repair to external
cable/ANT provider
received)
Request repair to external
cable/ANT provider
Y
Check audio
B+Voltage (24V)
B+Voltage (24V)
Replace Main B/D
(In case of
External Input
signal error)
Check and fix
external device
External Input
signal error)
Check and fix
external device
Replace Main B/D
N
End
☞169~171
☞172
Error
symptom
symptom
No response in remote controller and main unit key error
Check remote
controller battery
and product
selection
controller battery
and product
selection
Y
N
Normal?
Check for 3
wave length
wave length
3 wave
length?
N
Check and
replace battery
replace battery
Reset or replace
remote controller
remote controller
Y
Check IR sensor
voltage (5V)
voltage (5V)
Y
N
Normal
voltage?
Normal
voltage?
Y
N
Check and fix 3.5V
Line of Main B/D
Line of Main B/D
Replace Analog B/D (Old)
/ Main B/D (New)
/ Main B/D (New)
Replace PRE –AMP
Replace Key PCB
Check for 3
wave length
florescent light
wave length
florescent light
Request for florescent light
replacement or attach mesh
cloth
replacement or attach mesh
cloth
OR
Check for TV operation
after removing other
product
remote controller battery
after removing other
product
remote controller battery
Check for
external wave
length effect
external wave
length effect
OR
OR
Established
date
date
Electronics 6-3
Standard Repair Process
Revised date
2008. 2 . 1
LCD TV
D. Function error
No response in remote controller,
key error, recording error, memory error
key error, recording error, memory error
10/13
☞173
Error
symptom
symptom
Replace module
Zoom part with
exterior damage
exterior damage
Module
damage
Cabinet
damage
Replace cabinet
Replace remote controller
Remote
controller
damage
Stand
dent
Replace stand
Established
date
date
Electronics 6-3
Standard Repair Process
Revised date
2008. 2 . 1
LCD TV
F. Exterior defect
Exterior defect
13/13
Error
symptom
symptom
After turning on the power and disassembling the case, check with the naked eye,
whether you can see light from 6 locations.
Established
date
date
Electronics 6-3
Standard Repair Process Detail Technical Manual
Revised
date
date
2008. 2 . 1
1/33 - 1/13
LCD TV
Error
symptom
symptom
Content
Check LCD back light with naked eye
A. Video error_No
video/Normal audio
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