LG 70LA8600-SA (CHASSIS:LJ34D) Service Manual ▷ View online
E. Noise
Circuit noise, mechanical noise
Established
date
Revised date
13/14
LCD TV
Error
symptom
Standard Repair Process
2012. 01 .14
Check
location of
noise
Identify
nose type
Circuit
noise
Replace PSU(with LED driver)
Replace LED driver
OR
Mechanical
noise
Check location of
noise
※ When the nose is severe replace the module
※ When the nose is severe, replace the module
(For models with fix information, upgrade the S/W
or provide the description)
OR
※ If there is a “Tak Tak” noise from the cabinet,
refer to the KMS fix information and then
※ Mechanical noise is a natural
phenomenon, and apply the 1st level
description. When the customer does not
agree apply the process by stage
proceed as shown in the solution manual
(For models without any fix information, provide
the description)
OR
agree, apply the process by stage.
※ Describe the basis of the description in
“Part related to nose” in the Owner’s
Manual.
16 / 97
F. Exterior defect
Exterior defect
Established
date
Revised date
14/14
LCD TV
Error
symptom
Standard Repair Process
2012. 01 .14
Replace module
Zoom part with
exterior damage
Module
damage
Cabinet
damage
Replace cabinet
Replace remote controller
Remote
controller
damage
Stand
dent
Replace stand
17 / 97
Contents of LCD TV Standard Repair Process Detail Technical Manual
Continued from previous page
No.
Error symptom
Content
Page
Remarks
21
Check front display LED
A11
22
Check power input Voltage & ST-BY 3 5V
A12
p
p g
B. Power error_No power
22
Check power input Voltage & ST-BY 3.5V
A12
23
Checking method when power is ON
A13
24
POWER BOARD voltage measuring method
A4
25
25
26
B. Power error_Off when on, off while
viewing
POWER OFF MODE checking method
A14
28
Checking method in menu when there is no
audio
A15
C. Audio error_No audio/Normal video
audio
29
Voltage and speaker checking method when
there is no audio
A16
30
C. Audio error_Wrecked
audio/discontinuation
Voltage and speaker checking method in case
of audio error
A16
audio/discontinuation
of audio error
31
D. Function error_ No response in
remote controller, key error
Remote controller operation checking method
A17
18 / 97
Standard Repair Process Detail Technical Manual
Check Back Light On with naked eye
A. Video error_No video/Normal audio
A1
Established
date
Revised
date
Error
symptom
Content
LCD TV
2012. 01.14
g
y
<ALL MODELS>
date
Power On -> disjoint back case -> check lighting at any point
19 / 97
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