LG Electronics 42LT640H-ZA D. General Function Problem, Remote controlR/C operating error, Close

Standard Repair Process

	Error	D. General Function Problem	Established
LCD TV			date
	symptom	Remote control & Local switch checking	Revised date	10/13

1. Remote control(R/C) operating error

Replace

Check R/C itself

Operation

Normal Y operating?

N

☞A27

Check & Repair

Cable connection Connector solder

		☞				☞A27
	N		A27		Y
Normal			Check 3.5V	Normal		Check IR
operating?			On Main B/D	Voltage?		Output signal
Y			☞A4	N

Main B/D

Normal Y

Signal?

N

Check R/C Operating

When turn off light in room

If R/C operate,

Explain the customer cause is interference from light in room.

Check & Replace

Baterry of R/C

Normal Close operating?

N

Replace R/C

Close	Check 3.5v on Power B/D
	Replace Power B/D or
	Replace Main B/D
	(Power B/D don’t have problem)

Repair/Replace

IR B/D

10

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