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Only for training and service purposes

5-2. In case of does’t display the screen into specific mode

(1) Symptom

1) The screen does not become the display from specific input mode

(RF, AV, Component, RGB, DVI).

(2) Check following

1) Check the all input mode should become normality display

(3) In case of becomes unusual display from RF mode

(4) In the case of becomes unusual display from side S-video/AV mode

(5) In the case of becomes unusual display from Component, RGB mode

Is the Tuner normal?

Is the Tuner Cable connected?

Re-insert the Cable.

Yes

Is the IC100(LGE7383C)

normal?

Replace the Tuner.

Is the Input voltage, IIC Communication

and CVBS output normal?

Yes

Is normal the Input voltage, IIC

Communication?

Block A

Replace the IC.

Is the Video input of the AV

Jack(JK700, 707)normal?

Yes

Check the input source and Cable

Same as Block A

Is theR,G,B input and H,V Sync

of the JK701,703 normal?

Check the input source

Yes

Same as Block A

LG 50PG2000 Service Manual

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