Detector Circuit - Casio CASSIOPEIA A-20 Service Manual & Parts List

DETECTOR CIRCUIT

The detector circuit consistes of 7 blocks as follows;
1 : VDETECTOR1 (Alkaline and Li-ion)
2 : VDETECTOR2 (Alkaline and Li-ion)
3 : Backup battery detector
4 : AC Adaptor detector
VDETECTOR 1
V3SYS
VDETECTOR 2
BACKUP BATTERY DETECTOR
VSUB
AC ADAPTER DETECTOR
CN101
FULL CHARGE DETECTOR
Li-ion(CN105)
3V DETECTOR (AC ADAPTOR NO USED)
V3MAIN
PCMCIA VOLTAGE DETECTOR
VPC
Alkaline Detector
IC100(2.0V±5%)
Li-ion Detector
IC101(3.3V±2%)
Alkaline Detector
IC102(1.6V±1%)
Li-ion Detector
IC103(3.0V±2%)
IC112(2.7V±1%)
Q105
Q101
IC107(3.4V±1%)
5 Voltage
IC109(4.5V±2%)
3 Voltage
IC110(2.1V±2%)
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5 : Full charge detector
6 : 3V detector (AC adaptor is not used)
7 : PCMCIA voltage detector
VDET1B
(L=Low battery message)
VDET1RB
(L=Low battery message)
VDET2
(H=Forced power off)
VDET2R
(H=Forced power off)
VDETS
(H=Low battery message)
ACDTCB
(L=Adapter used)
CHGDTCTB
(L=Full charge)
VDET3B
(L=Low 3V voltage message)
VDTC5B
(L=Low PCMCIA voltage message)
VDTC3B
(L=Low PCMCIA voltage message)