Troubleshooting; Test Points - LG 47LB1DA 1080p LCD Training Manual

TROUBLESHOOTING

TROUBLESHOOTING

TEST POINTS

SMPS
Connector Pin Stby
P200 1 3.4 V
2 3.4 V
3 GND
4 GND
5 6.0 V
6 6.0 V
7 GND
8 GND
9 12.4 V
10 12.4 V
11 GND
12 GND
Connector Pin Stby
P201 1 17.8
2 17.8
3 GND
4 GND
5 6.0 V
6 GND
7 3.4 V
8 GND
9 12.4 V
10 GND
Connector Pin Stby
P202 1 5.2 V
2 2.2 V
3 5.2 V
4 GND
5
6
7 1.6 V 3.3 V
8 5.2 V
9 GND
10 0.1 V 3.3 V
11 6.0 V
12 GND
13 1.9 V
Connector Pin Stby
P203 1
P204 2 1.6 V 3.3 V
P205 3 GND
P206
4 GND
5 GND
6 GND
7 GND
8 23.9 V
9 23.9 V
10 23.9 V
11 23.9 V
12 23.9 V
Directview LCD Training
Analog Board
Run Connector Pin
nc P104
nc
nc
nc
nc
nc
nc
nc
nc
nc
nc
nc
Run Connector Pin
18.3 P301
18.3
nc
nc
nc
nc
nc
nc
nc
nc
Run Connector Pin
nc P602
nc
nc
nc
0 3.3 V
0 nc
nc
nc
nc Connector Pin
nc P603
nc
Run
0 3.3 V
nc
nc
nc
nc
nc
nc
nc
nc
nc
nc
Stby Run Connector Pin
1 0 nc P406
2 0 nc
3 0 nc
4 0 nc
5 1.4 V nc
6 0 nc
7 0 nc
8 0 nc Connector Pin
9 0 nc P1603
10 0 nc
11 0 nc
12 0 nc
Stby Run
1 17.8 18.3
2 17.8 18.3
3 GND nc
4 GND nc
5 6.0 V nc
6 GND nc
7 3.4 V nc
8 GND nc Connector Pin
9 12.4 V nc P1604
10 GND nc
Stby Run
1 5.1 V nc
2 0 nc
3 4.6 V nc
4 0 nc
5 0 nc
6 0.7 V nc
7 4.9 V nc
8 4.9 V nc
9 0 nc
10 8.9 V nc
Stby Run Connector Pin
1 0 nc P1605
2 3.3 V nc
3 0 nc
4 3.3 V nc
5 0 nc
6 0 nc
7 0 nc
8 8.9 V nc
NOTE: "nc" = No Change from Standby to Run
NOTE: All voltages taken w ith chassis ground as reference
20
De-Interlace Board
Stby Run
1 0 nc
2 5.9 V nc
3 5.9 V nc
4 0 nc
5 0.5 V 12.3 V
6 0.5 V 12.3 V
Digital Board
Stby Run
1 3.4 V nc
2 3.4 V nc
3 GND nc
4 GND nc
5 6.0 V nc
6 6.0 V nc
7 GND nc
8 GND nc
9 12.4 V nc
10 12.4 V nc
11 GND nc
12 GND nc
Stby Run
1 5.2 V nc
2 2.2 V nc
3 5.2 V nc
4 GND nc
5 0 3.3 V
6 0 nc
7 1.6 V 3.3 V
8 5.2 V nc
9 GND nc
10 0.1 V 3.3 V
11 6.0 V nc
12 GND nc
13 1.9 V nc
Stby Run
1 0 nc
2 5.9 V nc
3 5.9 V nc
4 0 nc
5 0.5 V 12.3 V
6 0.5 V 12.3 V
Troubleshooting