Power Supply Micro Commands - LG 42LH50 Training Manual

42LH50 P2400 ON MAIN PWB TO SMPS P201 TURN ON CIRCUIT
42LH50 P2400 ON MAIN PWB TO SMPS P201 TURN ON CIRCUIT
SMPS
P201
n/c
n/c
1
PWR
4.98V
2
Gnd
Gnd
3
Gnd
Gnd
4
Gnd
Gnd
5
Gnd
Gnd
6
7
8
SBY5V
9
10
Gnd
Gnd
11
Gnd
Gnd
12
12V
13
12V
12V
14
Gnd
Gnd
15
Gnd
Gnd
16
21.3V
17
24V
21.3V
18
n/c
n/c
19
INV.On
3.8V
20
A.DIM
1.8V
21
ERR Out
0V
22
n/c
n/c
23
PWM-DIM
3.38V
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
LVDS 12V Panel Power
MAIN PWB
P2400
n/c
1
PWR ON
2
3
4
5
6
5V
7
5V
8
5V
9
5V
10
11
12
13
14
15
16
17
L2406
18
19
INV ON/OFF
20
21
Error Out
22
n/c
23
A-DIM
24
Analog Dimming (Fixed Value)
Digital Dimming (Variable)
PWM-DIM
Q2406
6 3
5
4
L2411
8 1
+5V
7
2
L2401
C2410
15pF
Q2407 Q2409
L2405
R2427
5.2V
68uF
STBY5V
L2402
12V
C2406
220uF
24V
C2400 C2404
68uF 1uF
R2421
100
Stby = 5V Run = 0V
L2404
L2426
PG 26
R2416 47KΩ
Q2404
R2417 47KΩ
0.6V
STBY5V
Q2402
0.2V
0.6V
R2402
10KΩ
0Ω
R2431
Power On/Off1
R3286
33K
100
Error 5V: Normal 0V:
Lamps try to fire 4 time,
if Error line is high, Micro
shuts off television.
R2425
1KΩ
+5V
Q2408
R2426
10KΩ
R2468
R3269
0Ω 100Ω
R2424 R3289
100Ω 100Ω
R2404
R138
C2401
4.7K
100
Ω
1uF
R2470
R143
0
100
Ω
C2433
1uF
L2400
12V
0V
IC3202
Sub
Micro
39
LED Pwr On
41
LED Warm Stby
P5.4
32
Power On/Off1
Ω
33
P5.4
R3286
Panel Control
100
29
Power Det
27
Reset
Key 1 17
Key 2 28
34
Inverter Ctl
P5.3
P5.6
31
Error Out
R25
A-DIM
GPIO-09
IC100
BCM
E22 P-DIM
GPIO-24