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22LG300C (CHASSIS:LD85A) - LG TV Service Manual (repair manual). Page 17

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- 17 -
Check the input source.
Same as Block A.
No
Check the IC700.
No
Yes
Is video input
of the RGB jack normal?
(Check JK703_Pin1,
2,3,13,14)
No
Is waveform
of Switching IC normal?
(Check IC700_Pin11,
12,13)
8. Unusual display from RGB mode
7. Unusual display from Component mode
Yes
No
Same as Block A.
Is video input
of the Component Jack
normal?(Check R733,
734,735)
Check the input source.
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