Detector Circuit - Casio A-10 Operation, Service Manual & Parts List

DETECTOR CIRCUIT

The detector circuit consistes of 4 blocks as follows;
1 : Primary detector (Alkaline and NiMH)
2 : Secondary detector (Alkaline and NiMH)
3 : Backup battery detector
4 : AC Adaptor detector
PRIMARY DETECTOR
V3SYS
VBAT2
SECONDARY DETECTOR
V3MAIN
V5MAIN
BACKUP BATTERY DETECTOR
VSUB
AC ADAPTOR DETECTOR
RBATMAIN
From RS232C Connector
NiMH Detector
U17(2.3V)
U16(1.9V)
Alkaline Detector
U12(2.0V)
U13(1.6V)
Alkalin & NiMH Detector
U14 (3.4V)
OR circuit (Tr)
Alkalin & NiMH Detector
U32 (4.5V)
U15 (2.7V)
Q18
— 38 —
VDET1RB (L=Low battery message)
VDET2R (H=Forced power off)
VDET1B (L=Low battery message)
VDET2 (H=Forced power off)
VDET3B (L=Forced power off)
VDETS (H=Low battery message)
ACDTCTB(L=Adaptor used)