LG 32LD350 - Page 35

IC405
32LD350 P403 on Main to SMPS P201 Television Turn On Circuit
32LD350 P403 on Main to SMPS P201 Television Turn On Circuit
November 2010 32LD350 3D-LCD
R189
R201
100Ω
PWR ON
3.28VPWR On
PWR_ON
A.DIM
INV.On
PWM-DIM
AB12
IC100
Mstar
PWM2
GPIO 097
100
H5
R245
100
GPIO137
3.5V_ST
3.41V
24V
SAR0
L404
Q402
R406
R421
10KΩ
GPIO 136
R244
100Ω
INV CTL
2
6
D
8
Q409
+5V Normal
L422
Panel VCC (LVDS 12V)
R459
10KΩ
2.39V
1.84V
G
Q406
Q407
PANEL_CTL
L417
R429
47KΩ
0.03V
R439 10KΩ
R440 1.8KΩ
E9
C401
100uF
RL_On
Error_Out
P-DIM
24.19V
3.32V
4.7K
35
P403
MAIN Board
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
4
3
6
5
8
7
10
9
11
12
14
13
16
15
18
17
20
19
22
21
23
24
SMPS
P201
1
3.41V
3.41V
3.41V
Q401
0.68V0.02V
11.97V
11.97V
S
12V
12V
IC406
11.97V
F6
100
R251
GPIO 138
Power On/Off 1
7
L412
3.5V_ST
2
6
8
+3.3V Normal
L421
R456
10KΩ
2.39V
L416
12V
11.97V
7
24.19V
24.19V
24V
N/C
Gnd
Gnd
Gnd
Gnd
11.97V
11.97V
11.97V
12V
12V
12V
12V
0.59V
ERR Out
4.49V
2.46V
Q405
G5
+3.3V Normal
R419
1KΩ
N/C
R473 0Ω
+3.3V Normal
R486 4.7KΩ
R472
0Ω
R479
0Ω
R424
0Ω
THREE STEP TURN ON PROCESS:
Stand-By: STBY_3.5V arrives on main. Powers up MStar (Micro /
Video Processor) Reset occurs. Then when a power on from the
Key board or IR arrives, 3 step process begins.
Step 1) RL_ON: Turns on the SMPS. 12V and 24V
12V arrives on Main, Power_Det sent to Mstar.
1b) MStar turns on IC405 and IC406.
Step 2) Panel_CTL: Turns on Panel VCC Q409, sent to panel.
Step 3) INV_CTL: Turns on the Backlights, to SMPS then Ballast.
A-DIM Pin 22: (Silk Screened P-DIM) Is not unsed.
Error_Out Pin 20: (Silk Screened A-DIM)
Goes high (3.3V) when the backlights are told to
come on. Goes back low when they light.
If it goes high again on the 5
th attempt to fire the
backlights, the set shuts off.
PWM2PWM-DIM
E5
R401
10K
R237
100Ω
A4
B4
SAR1
KEY 1
KEY 2
C4
R193
0Ω
IR
IRIN
D4
HWRESET
S5/S6
Reset
XIN
B3
XOUT
A3
X100
12MHz
0.64V
1
2
3
0V
0.89V
3.39V
3.28V
0V
3.32V
4.99V
3.35V
H6
Power
Det
IC408
2
Step 3
Step 1
Step 2
Step 1b
Power On
Key 2
drops to
0.52V
IC103
Pin 9
P2401
Pin 5
P2401
3.4V
Normal