- 5 -
Voltage level is measured at the following condition.
1. Plug the power cord in AC outlet.
2. Mode switch position : REG, display 0.00
3. Put in the memory protection batteries.
4. Plug out : Plug out the power cord , the memory protection batteries in.
6-2. Reset circuit
When the voltage level at the pin no.17 of CPU is
not stable, CPU does not work properly.
To make a stable voltage, the reset IC(S-80728AN)
is used for this circuit.
In case the voltage level of VDD becomes down
output terminof reset IC is out the stable voltage.
A
B
GND
E
F
C
I
D
G
H
A B C
D E
F
G H I
Power ON
9.65 VAC
10.52V
5.76V
10.45V
0.78V
0.12V
Pulse
5.07V
-23.9V
Plug out
0 0 0
0 0
4.13V
0
4.30V
0
RESET
Pin No.17
VDD
GND
S-80728AN
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