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