Cpu Commands Explanation - Panasonic TC-L42D2 Technical Manual

①
TV SUB ON
The SYSTEM MPU on the A board outputs the
"TV SUB ON" command (3.2V) when the power
is turned on. This command is used to turn on
the circuit in the power supply that generates
F15V and Sound 15V.
F15V is provided to the A board to generate the
sub-voltages used by the signal process circuit.
The outputs of the sub-voltages 5V, 1.8V and
1.2V are confirmed by ASIC IC4700.
②
Backlight ON
After receiving SUB3.3V, 1.8V, 1.2V, "Backlight
ON" command is applied to the P board power
supply from Nile-TCON IC8001 to turn on the P
board circuits to start backlight circuit.
Panel STB ON / VCC ON
On the other hand, IC8001 starts the DC/DC
converter Q5412 to supply 12V to TCON board.

CPU Commands Explanation

③
①
A03
TV SUB ON
5
②
Backlight or Inverter ON
1
IC5605,5606,5610
F15V
9
DC/DC Converters
10
Sound 15V
7
Distribute
Q5412
A21
DC/DC Converter
PNL12V
1-5
IC8001
Nile-TCON
IC4700 ( System
5V
MPU )
1.8V
1.2V
3.3V
1.8V
1.2V
③
PANEL_STB_ON/VCC_ON
A
A
Slide # 32