Service manual

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Alert :
The charge controller will send an alert signal, when the adapter is plugged in or out, when
the battery is inserted or removed, or when the battery is low.
During the alert signal, the charge controller will send the low signal pulse three times
within a 10 second period.
Battery low alarm :
When the battery is low, the charge controller will send out the battery low alert. If KBC or
the OS doesn’t respond, the battery will go to the low signal in 2 seconds.
The battery low alarm is decided by the “alarm time”, the battery voltage is for reference
only. Therefore the battery low alarm defines the alarm time not the voltage.
Alarm time :
- Alarm time is defined from the time the battery low beep starts until the computer
shuts down.
- The alarm time of a dumb battery must be less than 15 minutes and greater than 3
minutes for ZD Mark3.0.
- The alarm time of a smart battery is defined by either the remaining capacitor
alarm or the remaining time alarm.
The battery is not normal if the green LED blinks while the battery is charging.
You must shutdown the computer, unplug the adapter and remove the battery. After the
battery cools down, reinstall the battery and plug in the adapter to recharge the battery.
Smart battery :
The charge current of the smart battery depends on BQ2040 data.
The full charge of a smart battery depends on the remaining capacitor alarm or remaining
time alarm .
The smart charger always reads the temperature of the smart battery to detect Max. T and
OPT.
BIOS issue
After re-flashing the Bios, don’t use the Ctrl+Alt+Del key to restart your computer. In-
stead you should press the power button to shutdown the computer and then turn on the
computer, this will reload the default BIOS.
While using Ctrl+Alt+Del keys (warm start), KBC doesn’t send out battery setup param-
eters to charge controller IC.