Panasonic LCD-201803, Technical Manual

Page: 27 / 61

P
A
LCD Module
Power
For
LED
(Back
Light)
T-CON
board
LCD Panel
A02
A16
44 - 51
STB5V
F15V
P3
Transformer
T7301
Q7403
PFC
T7202
IC7201
DC/DC
IC7301
P2
Q7402/04
7
64V(*)
Output
16V
Output
1
4
PNL12V
16V
STB5V
3
9
TV_SUB_ON
5
BL_ON
14
2
LED
Drive
IC7800
1 - 4
L7815/16/
Q7804/01
DC/DC
IC7405
POWER
Switch
When the TV is plugged in, the power board outputs 5V for standby voltage.
When the power supply receives the TV_SUB_ON signal, it outputs 2 different voltages:
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 110-140V(*) to the backlight of LCD panel on pins 3 and 7 of connecter P3
10
POWER_ON
KEY3
6
(light)
2
64V(*)
27
Start up Operation-1
1,5
3,7
(Each models are different pin allocation but operation is same.)
(DC/DC)
6
(light)
Ex. 55FX600** series
VLED1,2
(*110-140V)
(*)The DC level is different
by the LCD panel.
7
9
14
1 - 4
10
3
<A+P>