Circuit Operation:
"Battery Low" and "Power Down" are detected by BBIC which check the voltage from battery.
The detected voltage is as follows;
- Battery Low
Battery voltage: V(Batt) 2.3V ± 50mV
The BBIC detects this level and " " starts flashing.
- Power Down
Battery voltage: V(Batt) 2.2V ± 50mV
The BBIC detects this level and power down.
Refer to Adjustment (Cordless Handset) ().
22.5. Speakerphone and Headset Jack
The hands-free loudspeaker at SP+ and SP- is used to generate the ring alarm. IC2 is used to
switch off the telephone loudspeaker and is used to amplify the signal to drive the hands-free
loudspeaker. They are selected using the SP_AMP line from pin 70 of the BBIC. 2.5mm headset
jack is also available.
23. CIRCUIT OPERATION (CHARGER UNIT)
23.1. Power Supply Circuit
The power supply is as shown.
24. SIGNAL ROUTE
82
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