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32LG6000 (CHASSIS:LD89A) - LG TV Service Manual (repair manual). Page 18

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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
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
No problem
2-8. In case of abnormal display or sound when HDMI1,2,3,4 mode
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