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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 On2 signal. IC5500 starts generating the PNL12V by this signal. The
PNL12V is provided to T-con circuit of the LCD Module.
6
<
: LD board ( backlight drive ) >
After that, IC8000 outputs the BL_ON command to the LD board through P board. The
BL_ON command turns on the IC7800 for LED backlight drive. Then 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) >
38
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