Acer AL1702 AL1702 Service Guide - Page 11

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