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Start up Operation-1
Ex. 43/49DS630** series
P
Transformer
T7301
24V/32V(*)
Output
PFC
T7202
IC7201
DC/DC
IC7301
16V
Output
When the TV is plugged in, the power board outputs 5V for standby voltage.
POWER
When the power supply receives the TV_SUB_ON signal, it outputs 2 different voltages:
Switch
•16V to the A board on pins 1, 2, and 3 of connector P2.
•24/32V to the LED backlight board on pins 8,9 of connector P4.
After A board is ready to display, it outputs Backlight_on command to LD board.
(Each models are different pin allocation but operation is same.)
LD
P4
LD1
Q7402/05
L7813/14/
Q7804/01
24V/
32V(*)
(DC/DC)
LED
Drive
IC7800
Q7403
DC/DC
IC7503
LD2
3,7
VLED1,2(*)
6
6
(light)
(light)
1,5
3 3
5
P2
BL_ON
11
1,2,3
16V
1
7
STB5V
9
TV_SUB_ON
12
POWER_ON
LCD Module
Power
For
LED
(Back
Light)
PNL12V
A02
A19
10
1,3,5
F15V
11
STB5V
2
2
2
4
KEY3
LCD Panel
T-CON
board
4
1,2,3,4
A
27
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