MiTAC 8355 service manual LED Indicators, Fan power on/off management

8355 N/B MAINTENANCE

1.3.4 LED Indicators

System has eight status LED indicators at front side which to display system activity. From left to right that indicate,

AC POWER, BATTERY POWER, BATTERY STATUS, WIRELESS LAN, CD-ROM, HARD DISK, NUM LOCK, CAPS LOCK and SCROLL LOCK.

AC POWER: This LED lights green when AC is powering the notebook, and flash (on 1 second, off 1 second) when Suspend to DRAM is active using AC power. The LED is off when the notebook is off or powered by batteries.

BATTERY POWER: This LED lights green when the notebook is being powered by Battery, and flash (on 1 second, off 1 second) when Suspend to DRAM is active using Battery power. The LED is off when the notebook is off or powered by batteries, or when Suspend to Disk.

BATTERY STATUS: During normal operation, this LED stays off as long as the battery is charged. When the battery charge drops to 10% of capacity, the LED lights red, flashes per 1 second and beeps per 2 second. When AC is connected, this indicator glows green if the battery pack is fully charged or orange (amber) if the battery is being charged.

1.3.5 Fan power on/off management

FAN is controlled by H8 embedded controller-using AD2201 to sense CPU temperature and PWM control fan speed. Fan speed is depended on CPU temperature. Higher CPU temperature faster Fan Speed.

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