Casio M-U420 Technical Manual

Casio M-U420 technical ManualCasio M-U420 technical Manual

TECHNICAL MANUAL

(without price)

IMPACT DOT MATRIX PRINTER

M-U420

FEB. 2000

CONTENTS

CHAPTER 1 (FEATURES, GENERAL SPECIFICATIONS,AND PRINCIPLES OF OPERATION)

1.1 Features......................................................................................................................................... 1

1.2 General Specifications................................................................................................................... 1

1.3 Overview of Printer Mechanisms ................................................................................................... 2

1.4 Principles of Operation .................................................................................................................. 2

1.4.1 Transmission Mechanism.................................................................................................... 2

Paper Feed Gear Train........................................................................................................ 2

Head Movement Gear Train ................................................................................................ 3

1.4.2 Detection Mechanism .......................................................................................................... 3

Timing Detection Mechanism .............................................................................................. 3

Reset Detection Mechanism................................................................................................ 3

Validation Detection Mechanism.......................................................................................... 4

1.4.3 Print Mechanism .................................................................................................................. 4

Movement of Print Head Unit .............................................................................................. 4

Principle of Head Printing Operation ................................................................................... 4

1.4.4 Paper Feed Mechanism ...................................................................................................... 5

Paper Transport Mechanism ............................................................................................... 5

Paper Extension Mechanism............................................................................................... 5

Release Mechanism ............................................................................................................ 6

1.4.5 Clamshell Mechanism ......................................................................................................... 6

1.4.6 Ribbon Feed Mechanism..................................................................................................... 7

Ribbon Feed Operation ....................................................................................................... 7

1.4.7 Stamp Mechanism ............................................................................................................... 7

Stamp Operation .................................................................................................................7

1.4.8 Auto Cutter Mechanism (selectable function)...................................................................... 8

Partial Cut Operation ...........................................................................................................8

Full Cut Operation ............................................................................................................... 8

Cutter Detector .................................................................................................................... 8

1.4.9 Paper Take-Up Mechanism ................................................................................................. 9

Paper Take-Up Operation .................................................................................................... 9

CHAPTER 2 (HANDLING, MAINTENANCE, AND REPAIRS)

2.1 Handling the Printer ..................................................................................................................... 10

2.1.1 Precautions........................................................................................................................ 10

Transport Precautions ....................................................................................................... 10

Correct way to Carry and Handling way ............................................................................ 10

Storage Precautions .......................................................................................................... 10

Usage Precautions ............................................................................................................ 10

2.1.2 Inserting and Removing Paper ...........................................................................................11

Inserting Paper Roll ............................................................................................................11

Removing Paper Roll..........................................................................................................11

Inserting a Validation Card..................................................................................................11