LG 32LG7000, Руководство по обслуживанию

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- 20 - Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
Check video signal
1. CVBS : JK103 pin2 and C517
Check AV3 Jack.
1. AV3 LINK check
->R187 or JK103 pin3
Check Video, Audio
Check Audio signal
1. R : JK103 pin7 and C616
2. L : JK102 pin8 and C615
Audio NG
Check App S/W.
If App S/W OK then replace IC100.
No problem
Check the input source of Equipment.
NG
NG
Video NG
Check App S/W.
If App S/W OK then
replace IC100.
No problem
2-7. In case of abnormal display or sound when side AV3 mode
Check EDID.
1. Read EDID data.
Check EDID EEPROM
1. IC201~4 VDD Check
-> pin8:5V
2. DDC IIC lin check
-> IC201~4 pin6,5
Check HDMI HPD Output
1. HDMI JK201, 202, 203 Pin19
Check TMDS signal.
1. JK201~3, JK204 pin1~12 Check App S/W.
If App S/W OK then replace IC100.
No problem
Check App S/W.
If App S/W OK then replace IC201~4.
NG
Check HDMI 5V_DET input
1. HDMI JK201, 202, 203 Pin20 Check HDMI source.
If OK then replace HDMI JACK.
No problem
Check App S/W.
If App S/W OK then replace IC100.
No problem
No problem
or No sound
Check TMDS 351 IC(IC200).
1. VDD check -> pin6,12,19,25,40,46,55,61:3.3V
2. HDMI SEL check -> pin33,32
No problem : case HDMI1~3
Check TMDS351 TMDS signal check.
1. Pin17~27
No problem
Check App S/W.
If App S/W OK then replace IC100.
No problem
NG
No problem
case HDMI4
Video NG
Check App S/W.
If App S/W OK then replace IC200.
NG
EDID download
and re-check
All data:FF
2-8. In case of abnormal display or sound when HDMI1,2,3,4 mode