LG Electronics LD84A service manual No Raster

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2.No Raster

1)No OSD abnd image occur at screen.

2)It maintains the conditioon where the front LED is blue.

Does minute discharge

at Module?

Yes

Check the LCD Module.

Replace the Power board.

Is the link

cable normal?

Yes

Is the IC801’s output normal?

Yes

Reconnect Panel link cable. (P401 or P406 or P407)

Replace the Main board.

Change the IC(IC100).

* Caution

Before change Main Board,

Check S/W version and White Balance value.

Change Main bord.

S/W download and set White Balance value.

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Only for training and service purposes

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Contents LCD TV Contents Important Safety Notice Safety PrecautionsElectrostatically Sensitive ES Devices Servicing PrecautionsIC Remove/Replacement Requirement for Test SpecificationModule general specification Application rangeModel general specification Component Video Input Y, PB, PR RGB PC Input ModeHdtv 720P SdtvSdtv 480P Sdtv 576PAdjustment Instruction DesignationMain PCB check process AV SCART1/SCART2/S-VHS/CVBS ADC ProcessFunction Check Calibration ComponentTotal Assembly line process Setting Scaler Mstar Outgoing condition ConfigurationInternal pressure Check process TroubleshootingNo Power SymptomNo Raster Unusual display from DTV mode Unusual display from TV/CATV modeCvbs Input RGB Input Unusual display from AV1/AV2SCART modeUnusual display from AV3SIDE AV mode Unusual display from Component modeUnusual display from Hdmi 1/2/3 mode Unusual display from RGB modeNo Sound Block DiagramMemo Exploded View Page Page Page Feb