Power Supply - Toshiba 710CDT Maintenance Manual

1.9

Power Supply

The Power Supply sends four variations of voltages to the system board, has one microproces-
sor, and operates at 2 MHz. It offers the following features:
1. Determines if the AC adapter or battery is connected to the computer.
2. Detects DC output and circuit malfunctions.
3. Controls the Battery Capacity icon and DC In icon.
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 remaining battery capacity.
8. Detects Ring Indicator (RI) signal for the Auto Power On function.
The power supply output ratings are specified in Table 1-8.
Use
System logic, FDD, HDD
Display panel, FL and
PC card
CPU, RAM, PC card
Flash ROM, PC card
System logic
710CDT/720CDT
Table 1-8 Power supply board output ratings
DC
Name voltage
(V)
B5V +5.0
B3V +3.3
B12V +12.0
MCV +5.0
Regulation Maximum
tolerance current
(%) (mA)
±5 3,400
±5 3,800
±5 100
±5 5
Ripple
(mV)
100
60
240
100
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