User Guide

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N/B Maintenance
N/B Maintenance
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1.3.5 Fan Power On/Off Management
FAN is controlled by H8 embedded controller using ADM1021A to sense CPU temperature and PWM control fan
speed. Fan speed is depended on CPU temperature. Higher CPU temperature faster Fan Speed.
1.3.6 CMOS Battery
CR2032 3V 220mAh lithium battery.
When AC in or system main battery inside, CMOS battery will consume no power.
AC or main battery not exist, CMOS battery life at less (220mAh/5.8uA) 4 years.
Battery was put in battery holder, can be replaced.
1.3.4.2 Five LED indicators at front side:
From left to right that indicates CD-ROM/HARD DISK DRIVE, NUM LOCK, CAPS LOCK and SCROLL LOCK.