110 Series 1-15
1.8 Power Supply
The power supply provides five kinds of voltages to the system board. The power supply has
one microprocessor and it operates at 500 KHz. It contains the following functions:
1. Determines if the AC cable or battery is connected to the computer.
2. Detects AC output and circuit malfunctions.
3. Controls the LED icon and speaker.
4. Turns the battery charging system on and off and detects a fully charged
battery.
5. Determines if the power can be turned on and off.
6. Provides more accurate detection of a low battery.
7. Calculates the remaining battery capacity.
The power supply output rating is specified in Table 1-7.
Table 1-7 Power supply output rating
Voltage DC Regulation
Use name voltage tolerance (%)
System logic, FDD, HDD, VCC +5 ±5
Display
CPU CPUV +2.9 ±5
Flash ROM, PC card 12V +12 ±5
CPU, RAM, GA B3V +3.3 ±0.3V
VRAM, GA B5V +4.7 ±5
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