Casio CE-300 (EX-247) Service Manual

SPECIFICATIONS

BLOCK DIAGRAM 3-1. PCB connection

Block diagram (circuit)

CIRCUIT EXPLANATION 4-1. Power supply circuit

CPU (uPD78052GC-093-3B9)

Display controller (uPD16312GB-3B4)

Power down detection circuit (PWD)

RAM / ROM bank selection circuit

Head drive circuit for printer

Vpp sensor circuit

DIAGNOSTIC 5-1. To start the diagnostic program

To exit the diagnostic test

ERROR CODE 6-1. Operation error code

System lock code

IC DATA 1. TC74HC00AP

TC74HC367AP

S-80745 / S-80719

PCB LAYOUT

CIRCUIT DIAGRAMS

PARTS LIST