LG 42LV5500 Training Presentation page 74

42LV5500 T-CON (TFT Drive) with (Shield Removed) Components Identified
PANEL TEST
To run the T-CON "Panel Test",
remove the LVDS cables. Jump 12V
to the 12V fuse.
Jump VCC 3.3V to pin 44 on CN1.
White, Red, Blue, Green and Black
patterns show on screen.
(11.76V)
(11.76V)
12V
(18.3V) HVDD
L3
L1
D6
VDD 16.74V
Pin 18
1
(25.9V)
2
D3 3
1) 28.9V
D2
2) 28.2V
(30V)
3) 30.4V
CN5
FL1
28V
Pin 52 VGHR
-5V
Pin 51 VGHF
28V
Pin 50 VGHODD
28V
Pin 49 VGHEVEN
T-Con Board under shield. Be sure to reinsert screws before operating set with shield removed.
LVDS
Gnd
CN2
(3.35V)
L2
Gnd
D7
VCC 3.3V
Gnd
US1
US1
Q11
Q12
D1
2
3
2 2
1
3) Gnd
2) 1.6V
1) 0.6V
VGL_I -5V
C102
C101
-5V
Pin 48 VGL_I
-5V
Pin 47 VST
3.3V
Pin 35 VCC
16.74V
Pin 40,41 P-VDD
To Main
12V
Gnd
Gnd
(11.76V)
F1 3A/125V
(3.32V)
UC1
Pin 10
Pin 11
VGHODD 28V
Pin 12
C105 C106
VDD 16.74V
TO TFT MODULE
Pin 12 VGHEVEN
Warning:
74
LVDS
Gnd
CN1
Panel
Test
TP 44
Pin 15 Pin 13
VGHEVEN 28V
VST -5V
U3
VGHR 28V
VGHF -5V
Pins 7-8
P-VDD 16V
CN4
28V
Pin 9 VGHR Pin 13 VGL_I
-5V
Pin 10 VGHF
28V
Pin 11 VGHODD
28V
Pin 20,21 P-VDD
May 2011
U5
5) Gnd 4) 3.31V
6) Gnd 3) 3.3V
7) Gnd 2) 2.95V
8) Gnd 1) 3.3V
U5
FL2
U6
-5V
-5V
Pin 14 VST
3.3V
Pin 25 VCC
16.74V
LCD-DV 42LV5500