LG 32LG7000 Service Manual page 19

2-5. In case of abnormal display or sound when VGA Input mode
Check Video, Audio
Check 74HC14D IC103
1. H-sync : pin4
2. V-sync : pin8
3. If problem with IC103 then replace IC103
Check App S/W.
If App S/W OK then replace IC100.
2-6. In case of abnormal display or sound when Component Input mode
Check Video, Audio
Check App S/W.
If App S/W OK then replace IC100.
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Only for training and service purposes
No problem
or No sound
Check RGB Jack
1. RGB LINK check
->R189 or P101 pin10
Check sink signal
1. H-sync : P101 pin13
2. V-sync : P101 pin14
No problem : case 1
NG
Check Component Jack.
1. COMP LINK check
->R167 or JK102 pinA4
Audio NG
Check Audio signal
1. R : JK102 pin3E and C614
2. L : JK102 pin5D and C613
No problem
Check EDID EEPROM
1. IC102 VDD Check
-> pin8 : 5V
2. DDC IIC line check
-> IC102 pin 6, 5
NG
Check App S/W
If App S/W OK then replace IC102.
Check Video & sink signal
No problem: case 2
1. Red : P101 pin1 and C501
2. Green : P101 pin2 and C502
3. Blue : P101 pin3 and C503
Check App S/W.
If App S/W OK then replace IC100.
Check video signal
Video NG
1. Y : JK102 pin3A and C509
2. Pb : JK102 pin5B and C512
3. Pr : JK102 pin5C and C515
NG
Check the input source of Equipment.
- 19 -
No problem
Check EDID
1. Read EDID data
No problem
NG
No problem
NG
NG
EDID download
and recheck
Check App S/W.
If App S/W OK then
Replace IC100.
LGE Internal Use Only