LG 32LG40 Training Manual page 28

CIRCUIT DeSCRIPTIONS
MAIN vOlTAGES
For locations, refer to the Main board's bottom view. The panel control is on pin 33 of
3
IC407. Q900 turns on Q901, the LVDS Switch generats LVDS 12V. All voltages are shown
on the Interconnect diagram in the schematics section. LVDS Signal Waveforms are shown
on the back of Interconnect diagram.
2
L
G
4
0
Pin
1 LVDS 12V 0V 12.3V
3 LVDS 12V 0V 12.3V
5
7
9
11
13
15
17
19
21
23
25 Size Sel 0.4V 3.07V
28 28
Fall 2008 LCD Training Fall 2008 LCD Training
P902 "Main" to CN1 "T-CON"
Label SBY Run Diode Check
Gnd 0V 0V
Gnd 0V 0V
Gnd 0V 0V
LVDS 0V 1.2V
LVDS 0V 1.2V
LVDS 0V 1.1V
LVDS 0V 1.08V
LVDS 0V 1.14V
n/c 0V n/c
n/c 0V n/c
Pin Label
OL 2 LVDS 12V 0V 12.3V
OL 4 LVDS 12V 0V 12.3V
Gnd 6 Gnd
Gnd 8 Gnd
Gnd 10 Gnd
0.98V 12 LVDS
1.11V 14 LVDS
1.06V 16 LVDS
1.11V 18 LVDS
1.11V 20 LVDS
OL 22 n/c
Gnd 24 n/c
3V 26 Gnd
LVDS 12V LVDS 12V
SBY Run Diode Check
OL
OL
0V 0V Gnd
0V 0V Gnd
0V 0V Gnd
0V 1.1V 0.98V
0V 1.05V 1.06V
0V 1.09V 1.05V
0V 1.13V 1.06V
0V 1.06V 1.06V
0V n/c OL
0V n/c OL
0V 0V Gnd