Service manual

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8258I N/B Maintenance
8258I N/B Maintenance
When the battery voltage level reaches 8.56 volts, system will shut down automatically in order to extend the
battery packs' life.
1.3.6 Fan power on/off management
Fan is controlled by W83L951DG embedded controller-using ADM1032 to sense CPU temperature and PWM
control fan speed. Fan speed is depended on CPU temperature. Higher CPU temperature faster fan speed.
1.3.7 CMOS Battery
CR2032 3 V 220 mAh lithium battery, when AC in or system main battery inside, CMOS battery will consume
no power.
AC or main battery not exists, CMOS battery life at less (220 mAh/5.8 uA) 4 years
1.3.8 I/O Ports
• One Power Supply Jack
• One External CRT Connector For CRT Display
• Supports four USB port for all USB devices
1.3.5.3 Battery Dead State
MiTac Secret
Confidential Document