Battery Low/Power Down Detector; Speakerphone; Block Diagram (Charger Unit) - Panasonic KX-TG9581B Service Manual

4.4.4.

Battery Low/Power Down Detector

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)
The BBIC detects this level and "
• Power Down
Battery voltage: V(Batt)
The BBIC detects this level and power down.
4.4.5.

Speakerphone

The hands-free loudspeaker at SP+ and SP- is used to generate the ring alarm.
4.5.

Block Diagram (Charger Unit)

2.25 V ± 50 mV
" starts flashing.
2.0 V ± 50 mV
AC Adaptor
Charger Terminal
17
KX-TG9581B/KX-TG9582B/KX-TGA950B