Panasonic TC-L42D30, Technical Manual, Page: 38 / 80

38
TC-L37DT30 CPU Commands Explanation
IC8000
TV SUB ON
Backlight or Inverter ON
P15V
①
②
5V
3.3V
1.8V
1.5V
1.2V
IC5000
Distribute
DC/DC Converter
A16
1-4
PNL12V
③
PANEL_STB_ON/VCC_ON
IC5300
4
11
13
A02
9
System
MPU
A
A
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
+16V or P15V and DC24V.
P15V is provided to the A board to generate the
sub-voltages used by the signal process circuit.
The sub-voltages are confirmed by ASIC IC5000.
Backlight ON
After confirming the presence of the sub-
voltages, the “Backlight ON” command is
applied to the P board and subsequently the
LCD panel to turn on the circuit that controls the
backlight.
Panel STB ON / VCC ON
On the other hand, IC8000 provides the
Panel_STB_ON command to trigger the DC/DC
converter IC5300 into supplying 12V to the LCD
Panel or T-CON board.
①
②
③
DC/DC Converters
SOS
IC5400, 5420, 5440, 8100, 8702