8. Unusual display from RGB mode
Is video input | No | |
of the RGB jack normal? | ||
| ||
(Check JK703_Pin1, |
| |
2,3,13,14) |
|
Check the input source.
Yes
Is waveform | No | |
of Switching IC normal? | ||
| ||
(Check IC700_Pin11, |
| |
12,13) |
|
Check the IC700.
No
Same as Block A.
If there is normal status,
Replace main board.
9. Unusual display from HDMI 1/2/3 mode
Is video
input of the HDMI jack No normal? (Check JK900,
901,902)
Check the input source.
Yes
Check DDC | No | |
communication | ||
| ||
lines(IC900,901,903 |
| |
_Pin5,6 |
|
Check the IC900, IC901, IC903.
Yes
Check HDCP
communication lines
(IC902)
Yes
Is waveform
of Switching IC normal?
(Check IC902)
No
Same as Block A.
No
No
Check the IC902 and DHCP value
Check the IC902.
If there is normal status,
Replace main board.
Copyright © 2008 LG Electronics. Inc. All right reserved. | - 18 - | LGE Internal Use Only |
Only for training and service purposes |
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