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Start up Operation-11
4
5
<
and
The F15V is also used to generate the PNL-Voltage on A board. IC8000 outputs the
Panel VCC On signal. IC5260 starts generating the PNL12V by this signal. The PNL12V
is provided to T-con circuit of the LCD Module.
6
<
: P board ( backlight drive ) >
After that, IC8000 outputs the BL_ON command to the P board. The BL_ON command
turns on the IC7800 for LED backlight drive. Then the 64V rise up over 110V(*) and
output to the backlight on the LCD panel. The backlight starts lighting by PWM signals,
and LCD panel displays the pictures.
If the backlight drive circuit does not work normally, the BL_SOS signal is informed to
the IC8000. At that time, IC8000 stops outputting the TV_SUB_ON signal and blinks the
red LED 1 times.
: A board (PNL voltage) >
<A+P>
37
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