LG Electronics 32LS679C-ZC service manual A. Video error, Lcd Tv, Signal Quality Normal over 50%

Standard Repair Process

	Error	A. Video error	Established	2012. 01 .14
LCD TV			date
	symptom	Picture broken/ Freezing	Revised date		3/14

☞A5

Check RF Signal level

. By using Digital signal level meter

. By using Diagnostics menu on OSD

( Menu→ Set up→ Support → Signal Test )

-Signal strength (Normal : over 50%)

-Signal Quality (Normal: over 50%)

Normal

Y

Check whether other equipments have problem or not.

(By connecting RF Cable at other equipment)

Signal?

→DVD Player ,Set-Top-Box, Different maker TV etc`

N

Check RF Cable

Connection

1.Reconnection

2.Install Booster

N

Normal Y Picture?

N

☞A6

Check

S/W Version

SVC N

Bulletin?

Y

S/W Upgrade

Check	Normal	Y
		Close
Tuner soldering	Picture?
	N

Normal Picture?

Y

Close

Contact with signal distributor or broadcaster (Cable or Air)

Normal N Picture?

Y

Close

Replace

Main B/D

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