Casio M-U420 User manual

IMPACT DOT MATRIX PRINTER
FEB. 2000
M-U420
(without price)
TECHNICAL MANUAL
Casio M-U420 technical ManualCasio M-U420 technical Manual
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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
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2.1.3 Operating the Release Levers............................................................................................11
Function..............................................................................................................................11
Clamshell Access ...............................................................................................................11
2.1.4 Installing and Removing the Ribbon Cassette................................................................... 12
Installing the Cassette ....................................................................................................... 12
Removing the Cassette ..................................................................................................... 12
2.1.5 Installing and Removing the Stamp Assembly .................................................................. 12
Installing the Stamp Assembly........................................................................................... 12
Removing the Stamp Assembly......................................................................................... 12
2.1.6 Stamp Assembly Ink Refill ................................................................................................. 13
2.1.7 Replacing the Stamp Face ................................................................................................ 13
Disassembly ...................................................................................................................... 13
Reassembly....................................................................................................................... 13
2.2 Maintenance ................................................................................................................................ 14
2.2.1 Cleaning ............................................................................................................................ 14
2.2.2 Inspection .......................................................................................................................... 14
Daily Check ....................................................................................................................... 14
Periodic Inspection ............................................................................................................ 14
2.3 Lubrication ................................................................................................................................... 15
2.3.1 Lubricant Types ................................................................................................................. 15
2.3.2 Lubrication Standards........................................................................................................ 15
2.3.3 Lubrication Sites ................................................................................................................ 15
2.3.4 List of Lubricants and Adhesives ....................................................................................... 17
2.4 Tools ........................................................................................................................................... 17
2.4.1 List of Tools........................................................................................................................ 17
2.5 Repair .......................................................................................................................................... 17
2.5.1 Repair Levels..................................................................................................................... 17
2.5.2 Repair Procedure .............................................................................................................. 17
2.5.3 Repair Guidelines .............................................................................................................. 18
Arrangement of Connector Terminal.................................................................................. 24
CHAPTER 3 (DISASSEMBLY, ASSEMBLY,AND ADJUSTMENT)
3.1 Disassembly ................................................................................................................................ 25
3.2 Assembly ..................................................................................................................................... 25
Main Assemblies.......................................................................................................................... 26
Assembly 1 Installation of Fixing lever, J Fixing lever, R and Main motor sub ass'y .............. 26
Assembly 2 Assembly of Paper guide, lower unit ................................................................... 27
Assembly 3 Assembly of Take-up frame unit .......................................................................... 28
Assembly 4 Installation of Take-up frame unit and Paper guide, lower unit............................ 29
Assembly 5 Assembly of Driven plate ass'y............................................................................ 30
Assembly 6 Installation of Driven plate ass'y and Carriage drive pulley ................................. 31
Assembly 7 Assembly of Paper feed trigger ass'y.................................................................. 32
Assembly 8 Installation of Paper feed trigger ass'y ................................................................ 33
Assembly 9 Installation of Platen ass'y; Shaft, paper feed ass'y and Paper guide outlet ....... 34
Assembly 10 Assembly of Shaft, paper feed pressure ass'y .................................................... 35
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Assembly 11 Installation of Shaft, paper feed pressure ass'y .................................................. 36
Assembly 12 Installation of Release lever, RPT and Release lever, JNL ................................. 37
Assembly 13 Installation of Paper guide, upper unit................................................................. 38
Assembly 14 Installation of Timing detector ass'y and V detector ass'y ................................... 39
Assembly 15 Installation of Shaft, ribbon drive ass'y ................................................................ 40
Assembly 16 Assembly of Shaft, paper extension ass'y and Gear, paper extension shaft ...... 41
Assembly 17 Assembly of Gear train unit ................................................................................. 42
Assembly 18 Installation of Gear train unit ............................................................................... 43
Assembly 19 Installation of Guide frame .................................................................................. 44
Assembly 20 Installation of Timing detector ass'y..................................................................... 45
Assembly 21 Installation of Cutter unit...................................................................................... 46
Assembly 22 Assembly of Timing carriage drive belt ass'y....................................................... 53
Assembly 23 Installation of Main board ass'y ........................................................................... 54
Assembly 24 Soldering of lead wires ........................................................................................ 55
Assembly 25 Assembly of Validation guide and Card stopper.................................................. 56
Assembly 26 Installation of Carriage ass'y and Shaft, carriage guide ...................................... 57
Assembly 27 Assembly of FPC, head ass'y and Print head ass'y Ab....................................... 58
Assembly 28 Assembly of Paper feed cover sub ass'y (Manual cutter modes only) ................ 59
Assembly 29 Installation of Cutter unit (Auto cutter models only)............................................. 60
Assembly 30 Installation of Journal writing stand (Auto cutter models only) ........................... 61
Assembly 31 Assembly of Head cover ass'y ............................................................................ 62
Assembly I Timing carriage drive belt tension adjustment ..................................................... 63
Assembly II Adjustment of Platen gap .................................................................................... 64
Assembly III Corrention of print skew ...................................................................................... 65
APPENDIX
Exploded Diagram .............................................................................................................................. 66
Lubrication Points 1 ............................................................................................................................ 67
Lubrication Points 2 ............................................................................................................................ 68
PARTS PRICE LIST M-U420(061)..................................................................................................... 69
EXPLODED DIAGRAM M-U420(061)............................................................................................... 71
PARTS PRICE LIST M-U420(071)..................................................................................................... 72
EXPLODED DIAGRAM M-U420(071)............................................................................................... 75
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