LG 42LH90 Manual page 35

42LH90 P700 on Main Board to SMPS Turn On Circuit
42LH90 P700 on Main Board to SMPS Turn On Circuit
SMPS
P201
n/c
n/c
1
PWR
5V
2
Gnd
Gnd
3
Gnd
Gnd
4
Gnd
Gnd
5
Gnd
Gnd
6
5.15V
7
5.15V
8
SBY5V
5.15V
9
5.15V
10
Gnd
Gnd
11
Gnd
Gnd
12
11.9V
13
12V
11.9V
14
Gnd
Gnd
15
Gnd
Gnd
16
24.1V
17
24V
24.1V
18
n/c
n/c
19
INV.On
4.65V
20
A.DIM
1.66V
21
ERR
0V
22
n/c
n/c
23
PWM-DIM
3.2V
24
PWM-DIM (PWM Dimming) Manipulates the
Backlight Brightness via Customer's OSD.
Manipulates the Backlight Brightness via the
Video Processor chip. Darker Picture,
Darker Backlights to facilitate improved
Contrast Ratio. 0.6V ~ 3.3V Range
12V_TCON (LVDS 12V)
MAIN
+5V
BOARD
+5V_General
P700
n/c
1
L701
PWR ON
2
3
C711
4
15pF
5
6
7
8
5.2V
9
10
11
220uF
12
L704
13
14
15
16
17
L707
18
C722
47uF
19
INV ON/OFF
20
21
Stby = 0V Run = 0V
Error Out
22
n/c
23
A-DIM
24
Analog Dimming (Fixed Value)
Digital Dimming (Variable)
PWM-DIM
Q706
L728
R739 47KΩ
6 3
5
4
L715
1
8
7
2
0.2V
L709
Q701
R706 R771
0Ω
20K
L706
C726
+5V_ST
12V
R717
3.3KΩ
C721
68uF
Q702
24V
C728
1uF
R7141
R707
100
4.7K
L700
C706
1uF
R760
L705
C725
1uF
35
L708
Q705 Q704
R740 47KΩ
0.6V
5V_ST
Q703
F6
Power On/Off
0.6V
R726 R757 R251
IC100
10KΩ 0Ω
100Ω
Micro
3.3V_ST
From IC702
From
Reset D4
IC103,Q106
E5
RL_ON
RL_ON
R257
Ω
100
PANEL_CTL
Error=5V: Normal 0V:
Micro shuts off
Power Det
television.
+5V_General
R719 10KΩ
G5
R713 R244
P5.3
0Ω 100Ω
R201
P5.6
100Ω
31
Error Out
AB13
PWM0
R704
R185
GPIO-09
4.7K
Ω
100
R189
AD12 PWM2
0 Ω
100
12V
0V
Reset
H5
R245
100
H6
A4
Key 1
B4
Key 2
INV_CTL