Start Up Operation - Panasonic LCD-2016 Technical Manual

Start up Operation-1

Ex. 43/49DS630** series
Transformer
P
T7301 Q7402/05
24V/32V(*)
PFC Output
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.)
P4
LD1 LD
LD2
L7813/14/
3,7
Q7804/01
24V/
32V(*)
(DC/DC)
LED
Drive
IC7800
1,2,3
Q7403
DC/DC
IC7503
VLED1,2(*)
6
(light)
1,5
3
5
P2
BL_ON
11
16V
1
STB5V
7
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
4
KEY3
LCD Panel
T-CON
board
4
1,2,3,4
A
26