LG 55UM7450PVA Service Manual page 44

Standard Repair Process
Error
symptom
Identify
nose
type
Mechanical
Circuit noise, mechanical noise
Check location
Circuit
noise of 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.
E. Noise
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)
16
Established
date
Revised date
Copyright © 2019 LG Electronics. Inc. All rights reserved.
Only for training and service purposes