Power Supply - Toshiba T1960CT Maintenance Manual

1.8

Power Supply

The power supply supplies five kinds of voltages to the T1960CS/T1960CT system board.
The T1960CS/T1960CT power supply board has one microprocessor and operates at 500
KHz. The board performs the following functions:
1. Determines if the AC adapter or battery is connected to the computer.
2. Detects DC output and circuit malfunctions.
3. Controls the LED indicator 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.
Use for
System logic, FDD, HDD,
Display
RS-232-C Flash ROM
RAM, CPU
RS-232-C
1-14
Table 1-7 Power Supply Output Rating
DC
Name Voltage
(V)
VCC +5
12V +12
B3V +3.3
N9V –7 to –12.6
Regulation Maximum
Tolerance Current
(%) (mA)
±5 3,500
±5 120
±5 755
– 10
T1960CS/T1960CT
Ripple
(mV)
100
240
66
–