Casio 240CR Service Manual

— 18 —
"L"→"H" "H"→"L"
"L"→"H" "L"→"H"
HD1 ~ HD13
HD1 ~ HD13
CPU
Head drive 
circuit
VP
HDCOM
Printer
M405R
Motor
COM
VP
Motor drive 
circuit
MotorMotor
5-9. Printer drive circuit
When CPU wants to rotate the mortor, CPU outputs “Motor” signal (L ➔ H), and Motor signal goes
through the motor drive circuit and then it become “L”.Then Motor rotates because of difference voltage
between Motor and Motor COM TERMINAL.
Head drive signal is same as Motor drive.
IN1 1 16 OUT1
IN2 2 15 OUT2
IN3 3 14 OUT3
IN4 4 13 OUT4
IN5 5 12 OUT5
IN6 6 11 OUT6
IN7 7 10 OUT7
GND 8 9 COM
NC
A12
A7
A6
A5
A4
A3
A2
A1
A0
I/O 1
I/O 2
I/O 3
GND

Vcc
WE
CE2
A8
A9
A11
OE
A10
CE1
I/O 8
I/O 7
I/O 6
I/O 5
I/O 4 
TOP VIEW
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
5-10. IC data
1. BA12001/BA12004 2. LC3654
A0 ~ A12 : Address
WE : Write enable
CE1 : Chip enable 1
CE2 : Chip enable 2
I/O1 ~ I/O8 : Data
Vcc/GND : Power terminal

Casio 240CR Specifications

General

Brand	Casio
Model	240CR
Category	Cash Register
Language	English