Toshiba 50CT User Guide - Page 27

Power Supply, Detects a fully charged Main Battery Pack.

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1.7 Power Supply 1 Hardware Overview 1.7 Power Supply The power supply provides two kinds of voltages to the system board, has one microprocessor operating at 2 MHz, and performs the following functions: 1. Determines if the Universal AC Adapter or Main Battery Pack is connected to the computer. 2. Detects DC output and circuit malfunctions. 3. Controls the LED icon and the speaker. 4. Detects a fully charged Main Battery Pack. 5. Controls power on/off. 6. Provides more accurate detection of a low Main Battery Pack. 7. Calculates the remaining Main Battery Pack capacity. The power supply output rating is specified in Table 1-6. Table 1-6 Power supply board output rating Use CPU, RAM, GA, VGA, VRAM GA, BIOS ROM, KBC, PC card Name B3V VCC DC voltage (V) +3.3 +12.0 Regulation tolerance (%) ±5 ±5 1-14 Libretto 50CT/70CT Maintenance Manual

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1.7
Power Supply
1
Hardware Overview
1-14
Libretto 50CT/70CT Maintenance Manual
1.7
Power Supply
The power supply provides two kinds of voltages to the system board, has one
microprocessor operating at 2 MHz, and performs the following functions:
1.
Determines if the Universal AC Adapter or Main Battery Pack is connected to the
computer.
2.
Detects DC output and circuit malfunctions.
3.
Controls the LED icon and the speaker.
4.
Detects a fully charged Main Battery Pack.
5.
Controls power on/off.
6.
Provides more accurate detection of a low Main Battery Pack.
7.
Calculates the remaining Main Battery Pack capacity.
The power supply output rating is specified in Table 1-6.
Table 1-6
Power supply board output rating
DC
Regulation
Use
Name
voltage (V)
tolerance (%)
CPU, RAM, GA,
VGA, VRAM
B3V
+3.3
±5
GA, BIOS ROM,
KBC, PC card
VCC
+12.0
±5