Casio CASSIOPEIA A-20 Service Manual & Parts List page 56

Step Operation
Setting Change to connect power
supply to the terminals for
rechargeable battery.
Vr = 2.6 V
VDET1R Put power supply voltage
down by degrees.
VDET2R Put power supply voltage
down by degrees.
VDETS C h a n g e t o c o n n e c t
power supply to the ter-
minals for backup bat-
tery.
Vs = 3.0 V
Put power supply voltage
down by degrees.
Display (Wiring)
Rechargeable battery terminal
-
V
+
Vr
AC adapter Charger
VDET1R ON
VDET2R OFF
VDET1R ON
VDET2R ON
Backup battery terminal
-
V
+
Vs
VDETS ON
— 53 —
Note
Connect the items as
shown.
A-20
Measure the voltage that
VDET1R becomes ON.
VDET1R= 3.3 V ± 2 %
Measure the voltage that
VDET2R becomes ON.
VDET2R= 3.0V ± 2 %
Connect the items as
shown.
A-20
Measure the voltage that
VDETS becomes ON.
VDETS = 2.7 V ± 1 %