Toshiba portege 610ct 620ct Instruction De Maintenance
610CT
1-13
1.7
Power Supply
The power supply provides five kinds of voltages to the 610CT system board. The power
supply has one microprocessor which operates at 500 KHz and performs the following func-
tions:
supply has one microprocessor which operates at 500 KHz and performs the following func-
tions:
1.
Determines if the AC adapter or battery is connected to the computer.
2.
Detects DC 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 1-5.
Table 1-5 Power supply output rating
DC
Regulation
Use for
Name
voltage
tolerance
(V)
(%)
System logic, FDD, HDD,
VCC
+5
±5
Display
DSPV
+15
±5
RS-232C
P+12V
+12
±5
CPU, RAM
B3V
+3.3
±5
VGA,I/O
B5V
+5
±5