LG 42LH40 Series, Руководство пользователя

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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
42LH40 P700 on Main Board to SMPS P201 Turn On Circuit Diagram
42LH40 P700 on Main Board to SMPS P201 Turn On Circuit Diagram
R189
R185
1.2K
100
R714
R704
C711
150pF
C181
1uF
P700
12V
12V
Gnd
Gnd
Gnd
Gnd
0V
3.38V
4.98V
1.8V
P201
ERR Out
PWR
A.DIM
INV.On
PWM-DIM
n/c
SMPS
AB12
IC100
Mstar
PWM2
PWM0
100
Ω
n/c
Gnd
Gnd
Gnd
Gnd
Analog Dimming (Fixed Value)
100
H5
R245
100
GPIO137
SBY5V
MAIN PWB
5V
5V
5V
5V
Gnd
Gnd
12V
2
1
4
3
6
5
8
7
10
9
11
12
14
13
16
15
18
17
20
19
22
21
23
24
2
1
4
3
6
5
8
7
10
9
11
12
14
13
16
15
18
17
20
19
22
21
23
24
21.3V
24V
Gnd
Gnd
Gnd
Gnd
Gnd
Gnd
n/c
n/c
n/c
n/c
E5 GPIO 134
L706
L704
24V
C721
68uF
C727
68uF
L707
12V
C722
47uF
L701
R702
R257
G5
R719 1K Ω
Q702
R713
0 Ω
R717
3.3K Ω
GPIO 136
R244
100
Ω
+5V General
Power On
Inverter On/Off
3
1
2
6
5
8
7
Q706
+5V
L715
+5V General
L709
LVDS 12V Panel Power
L728
Q703
R726
10K Ω
0.2V
6V
0.6V
4
Q704 Q705
LVDS Panel
Control
R732
22K Ω
0V
0.6V
12V
R739 47K Ω
R740 47K Ω
AB13
Digital Dimming (Variable)
C726
220uF
STBY5V
L700
R760
0
L705
Relay On
A-DIM
P-DIM
STBY5V
4.7K
C182
1uF
C725
1uF
C706
1uF
21.3V
3.8V
10K
26
R708
C745
100uF
Q700
Q701
L708
5.2V
n/c
n/c
INV ON/OFF
PWR ON
A-DIM
PWM-DIM
R201
100
Ω
E8
GPIO 97
Error Out
Stby = 5V Run = 0V
Error 5V: Normal 0V:
Lamps try to fire 4 time,
if Error line is high, Micro
shuts off television.