Read LG 42LM3400 / 42LM340S / 42LM340T (CHASSIS:LD21C) Service Manual online
Check
location of
noise
location of
noise
Identify
nose type
nose type
Circuit
noise
Replace PSU (with LED driver)
Replace LED driver
Mechanical
noise
Check location
of noise
of noise
OR
※ When the nose is severe, replace the module
(For models with fix information, upgrade the
S/W or provide the description)
(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)
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.
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
13/14
LCD TV
Error
symptom
Standard Repair Process
2012. 01 .14
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