Toshiba Satellite X200, Руководство по обслуживанию

Страница: 24 / 250

1.5 Power Supply 1 Hardware Overview
Satellite X200/ X205 Series Maintenance Manual
[CONFIDENTIAL]
1-11
1.6 Power Supply
This specification defines the performance and characteristic of 180W AC adapter power
supply. It supplies a constant voltage 19V output source for Satellite X200/ X205 Series
Personal Computer.
‰
A/D conversion
•
The EC uses 10-bit sampling for A/D conversion to determine the following
values:
– Battery and temperature
‰
AC adaptor and battery check
•
The EC checks the following by A/D converted values:
– Battery installed
•
The EC checks the following by GPIO values:
– AC adaptor connected
‰
Abnormal check
•
The EC determines whether the condition is abnormal, and if so, stores an error
code into the error register.
‰
Input port management
•
The EC monitors the following input signal status:
– System power ON/OFF status
– Direct CD power ON/OFF status
‰
Beep and LED control
•
Beep is caused by the low battery status.
•
The EC controls the following two kinds of LED
– DC IN LED (one color: red)
•
Red: indicates AC adaptor is connected
– Battery LED (two colors: orange and red)
•
Red solid: The battery is fully charged.
•
Orange: The computer is quick-charging the battery / The battery is low.
‰
Power ON/OFF sequence
•
When power is turned on or off, the EC starts the power on or off sequence.
– SQ0-4 = power ON sequence
– SQ5-B = power OFF sequence