Service manual

Page 9
AL1702
4.4Power OFF sequence
When the POWER switch is pressed, while the power supply is ON, the POWER ON signal is turned “H”.
when this “H” potential is detected, the CPU begins to turn off the respective power supplies according to
sequence show below.
Power Switch
AUDIO_EN
(Audio VCC)
LED_G (LED)
PANELVCC_EN
(Panel VCC)
BKLT_EN
(Backlight Power)
PCLK/DATA
(LVDS bus)
1.8 sec
1.84 sec
2 sec
2 sec
157 ms
Power Switch
AUDIO_EN
(Audio VCC)
LED_G
(LED)
PANELVCC_EN
(Panel VCC)
BKLT_EN
(Backlight Power)
PCLK/DATA
(LVDS bus)
90 ms
350 ms
316ms
90 ms
1.55 sec
4.3Power ON sequence
When the POWER switch is pressed, the POWER OFF signal is turned “H”. when this “H” potential is
detected, the CPU begins to establish the respective power supplies according to the sequence show below.