LG 75SM9900PTA Service Manual page 42

Standard Repair Process
Error
symptom
Identify
nose type
Mechanical
E. Noise
Circuit noise, mechanical noise
Check location
Circuit
of noise
noise
Check location
of noise
noise
※ 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.
Established
date
Revised date
Replace PSU
※ 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 proceed as shown in the solution manual
(For models without any fix information,
provide the description)
15
Copyright © 2019 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
15/16