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Casio CE-250 Service Manual
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— 23 —
8.
IC DATA
2. TC74HC08AP
3. TC74HC138
1. TC74HC00AP
1
2
3
4
5
7
6
1A
1B
1Y
2A
2B
GND
2Y
VCC
4B
4A
4Y
3B
3Y
3A
14
13
12
11
10
8
9
1
2
3
4
5
7
6
1A
1B
1Y
2A
2B
GND
2Y
VCC
4B
4A
4Y
3B
3Y
3A
14
13
12
11
10
8
9
1
2
3
4
6
8
7
5
11
9
10
12
A1
B2
C3
G2A
G2B
G1
GND
( T
OP VIEW
)
Y7
VCC
Y0
Y1
Y2
Y4
Y3
Y6
Y5
16
15
14
13
SELECT
INPUTS
ENABLE
INPUTS
Y0
D
ATA
OUTPUTS
A
B
C
G2A
G2B
G1
Y1
Y0
Y3
Y4
Y5
Y6
Y7
24
26
Table of Contents
Service Manual
2
Default Chapter
2
Table of Contents
2
1 Specifications
3
2 Initialize (Mac) Operation
4
3 Block Diagram
5
Pcb Connection
5
Block Diagram
6
4 Disassembly
7
5 Circuit Explanation
9
Power Supply Circuit
9
CPU (Upd78052Gc-159-3B9)
10
Display Controller (Upd16312Gb-3B4)
12
Initilize IC (Reset Circuit)
13
Power down Detection Circuit (PWD)
13
Address Latch Circuit
13
RAM / ROM Bank Selection Circuit
14
Head Drive Circuit for Printer
15
Power Supply Circuit for Display
16
6 Diagnostic Operation
17
To Start the Diagnostic Program
17
Check Item
17
Operation of each Test
17
To Exit the Diagnostic Test
22
7 Error Code List
23
Operation Error Code
23
System Lock Code
24
8 IC Data
25
9 Pcb Layout
28
10 Circuit Diagram
29
Model : Pcr-365A
44
11 Parts List
44
Exploded View
45
Main PCB Block E248-1 Ass'y
47
Button Block
48
Customer Display Block E248-E2-2
48
Main Display Block E248-E2-1
48
Power Supply Block
49
Lower Case Block
50
Others
50
Printer Block
50
Upper Case Block
50
Cash Drawer (DL-1324)
51
Printer (M-190G)
53
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Operator's Instruction Manual
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Casio CE-250 Specifications
General
Brand
Casio
Model
CE-250
Category
Cash Register
Language
English
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