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Start up Operation-1
Ex. 49/55EX600** series
P
Transformer
Q7402/04
T7301
64V(*)
Output
PFC
T7202
IC7201
DC/DC
IC7301
16V
Output
(*)The DC level is different by the LCD panel.
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, 3 and 4 of connector P2.
64V(*) to the LED backlight drive part.
After A board is ready to display, it outputs Backlight_on command to P board.
P board output 110-130V(*) to the backlight of LCD panel on pins 3 and 7 of connecter P3
(Each models are different pin allocation but operation is same.)
P3
L7815/16/
1,5
Q7804/01
64V(*)
(DC/DC)
LED
3,7
Drive
IC7800
P2
14
1 - 4
Q7403
DC/DC
7
IC7405
9
10
VLED1,2
(*110-132V)
6
6
(light)
(light)
5
3
3
A02
BL_ON
14
16V
1 - 4
1
STB5V
7
2
2
9
TV_SUB_ON
10
POWER_ON
<A+P>
LCD Module
Power
LCD Panel
For
LED
(Back
T-CON
Light)
board
PNL12V
44 - 51
A16
F15V
STB5V
KEY3
4
A
26
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