Acer AL1702 Service-Handbuch - Seite 11

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Acer AL1702 Service-Handbuch
4.3

Power 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.
Power Switch
LED_G (LED)
PANELVCC_EN
(Panel VCC)
PCLK/DATA
(LVDS bus)
BKLT_EN
(Backlight Power)
AUDIO_EN
(Audio VCC)
4.4

Power 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
LED_G
(LED)
PANELVCC_EN
(Panel VCC)
PCLK/DATA
(LVDS bus)
BKLT_EN
(Backlight Power)
AUDIO_EN
(Audio VCC)
157 ms
1.8 sec
1.84 sec
2 sec
2 sec
90 ms
350 ms
316ms
90 ms
1.55 sec
AL1702
Page 9