Epson LQ-1500 Service Manual - PDF DOWNLOAD

Epson LQ-1500 Service Manual - PDF DOWNLOAD

FILE DETAILS:

Epson LQ-1500 Service Manual - PDF DOWNLOAD

Language :English
Pages :241
Downloadable : Yes
File Type : PDF

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DESCRIPTION:

Epson LQ-1500 Service Manual - PDF DOWNLOAD

INTRODUCTION

• This technical manual describes the principle of mechanical and electrical operations, as well as the maintenance and repair procedures, of the EPSON LO-1500 Dot Matrix Printer.
• Chapters 4 through 6 of the manual deal with the fundamental troubleshooting, maintenance and repair of the LO-1500. For detail on the disassembly, assembly, troubleshooting and maintenance of the Model-3660 Printer Mechanism, refer to the separately published “Technical Manual of EPSON Model-3660”.

TABLE OF CONTENTS:

Epson LQ-1500 Service Manual - PDF DOWNLOAD

FRONT MATTER 1
TABLE OF CONTENTS 2
INTRODUCTION 4
CHAP 1-GENERAL 5
Product Overview 6
LQ-1500 Interface Overview 6
Specifications 6
Major Components 9
CHAP 2-PRINCIPLES OF OPERATION 12
General 13
Connection Diagram 13
Connector Pin Assignment 15
Connector on UXMCL circuit board 15
Connector on UXDRV circuit board 20
Connector on UXPS/PSU 24E circuit board 24
Electrical Curcuit 25
Power circuit 25
Reset circuit 34
Sensor circuit 34
Carriage motor control circuit 38
LF motor control circuit 46
Head driver circuit 49
Auto sheet load circuit 51
Other function 52
Printer Mechanism 53
Operation 53
CHAP 3-OPTIONAL EQUIPMENT 61
Centronics Compatible Parallel Interface Unit 62
Overview 62
Specification 62
Operating principle 65
Block diagram 67
Circuit diagram 68
Component layout 69
RS-232C / Current Loop Interface 70
Introduction 70
Specification 70
Operating principle 76
Block diagram 80
Circuit Diagram 81
Component Layout 82
IEEE- 488 Interface 83
Introduction 83
Specifications 83
IEEE-488 operational parameters 87
IEEE-488 functional commands 88
Block diagram 90
Circuit diagram 92
Component layout 93
Single Bin Cut Sheet Feeder 94
Double Bin Cut Sheet Feeder 94
Introduction 94
Specifications 95
Principles of operation 97
Disassembly and assembly103
Troubleshooting113
Preventive maintenance121
CHAP 4-DISASSEMBLY AND ADJUSTMENT124
General125
Tools and Measuring Instruments125
Disassembly and Assembly126
Removal of upper case126
Removing the circuit boards127
Removal of Model-3660 printer mechanism130
Removal of fan set UB 130
Removal, installation and adjustment of print head131
Removal of CPU and ROM133
Adjustment of the print alignment134
Adujustments136
MTS and DTS sensor board adjustment136
HP sensor board adjustment138
Backlash of the carriage motor and belt driving pulley139
Backlash of the paper feed motor and paper feeding reduction gear140
CHAP 5-TROUBLESHOOTING141
Entry to Troublshooting142
Check out Pro ceedure145
Unit Repair Flow Chart (UXMCL)159
Unit Repair Flow Chart (UXDRV)174
Unit Repair Flow Chart (IUPIF)181
Unit Repair Flow Chart (UXPS)183
CHAP 6-MAINTENANCE189
Maintenance190
Cleaning190
Inspection190
Lubrication191
Lubricants191
Lubrication requirements191
Lubrication points191
Adhesive application requirements192
Adhesive application points192
Lubricants and adhesives list193
CHAP 7-APPENDIX194
List of Principal IC's195
Discription of priniapl IC's196
Exploded Diagram for LQ-1500 (120V Version)229
Lubrication and adhesive points drawing A230
Lubrication and adhesive points drawing B231
Lubrication and adhesive points drawing C232
UXMCL circiut diagram 233
Component layout of UXMCL board234
UXDRV circuit diagram235
Component layout of UXDRV board236
UXPS circuit diagram 237
Component layout of UXPS board238
PSU 24E circut diagram239
Component layout of PSU 24E board240
UXFIL circut diagram241

S.M 26/2/2025