CASIO PCR-250
Instrukcja Serwisowa

D

C G

A

I

H

GND B E

F

A Power ON 9.65 VAC
Plug out 0

B 10.52V
0

C 5.76V
0

D 10.45V
0

E 0.78V
0

F 0.12V
4.13V

G Pulse
0

H 5.07V
4.30V

I -23.9V
0

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

VDD

S-80728AN

GND

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.

RESET
Pin No.17

-5-