Toshiba Tecra A3-S731 Maintenance Manual - Page 28
Power Supply, DC IN LED one color: Blue or Greenby sku
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1.5 Power Supply 1 Hardware Overview 1.5 Power Supply The power supply supplies seven different voltages to the system board and performs the following functions: 1. A/D conversion The EC uses 8-bit sampling for A/D conversion to determine the following values: • AC adaptor current • Battery and temperature 2. 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 3. Abnormal check The EC determines whether the condition is abnormal, and if so, stores an error code into the error register. 4. Input port management The EC monitors the following input signal status: • System power ON/OFF status 5. 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: Blue or Green(by sku)) • Green = indicates AC adaptor is connected Battery LED (two colors: Green & Orange Æ Blue & Orange) • Blue or Green solid = The battery is fully charged. • Orange = The computer is quick-charging the battery / The battery is low. Tecra A3/S2 Series Maintenance Manual 1-19