Epson LQ-500 L1000 TECHNICAL Manual- PDF DOWNLOAD

Epson LQ-500 L1000 TECHNICAL Manual- PDF DOWNLOAD

FILE DETAILS:

Epson LQ-500/L1000 Service Manual - PDF DOWNLOAD

Language :English
Pages :192
Downloadable : Yes
File Type : PDF

IMAGES PREVIEW OF THE MANUAL:

DESCRIPTION:

Epson LQ-500/L1000 Service Manual - PDF DOWNLOAD

PREFACE
This manual describes functions, theory of electrical and mechanical operations, maintenance, and repair of the LQ-500 and the L-1000. Thoughout this manual both printers are discussed. When an item is unique to one printer, special notation is made. Common items are treated in a general format.
The instructions and procedures included here are intended for the experienced repair technician, who should pay attention to the precautions on the preceding page. The chapters are organized as follows:

Chapter 1 -Provides a general product overview, lists specifications, and illustrates the main components of the printer.
Chapter 2 -Describes the theory of printer operation
Chapter 3 -Discusses the options.
Chapter 4 - Includes a step-by-step guide for product disassembly, assembly. and adjustment.
Chapter 5 - Provides Epson-approved techniques for troubleshooting.
Chapter 6 -Describes preventive maintenance techniques and lists lubricants and adhesives required to service the equipment.The contents of this manual are subject to change without notice.

TABLE OF CONTENTS:

Epson LQ-500/L1000 Service Manual - PDF DOWNLOAD

FRONT MATTER 1
TABLE OF CONTENTS 6
CHAP 1-GENERAL DESCRIPTION 7
FEATURES 9
SPECIFICATIONS 11
Hardware Specifications 11
Firmware Specifications 15
INTERFACE OVERVIEW 19
DIP SWITCHES AND JUMPER SETTING 22
DIP Switch Settings 22
Jumper Setting 23
SELECTYPE FUNCTION 23
OPERATING INSTRUCTIONS 24
Self-Test 24
Hexadecimal Dump Function 25
Bit-Image Printing 26
Error Conditions 27
Buzzer Operation 27
Printer Initialization 27
Default Values 28
Adjust Lever Operation 28
Printer Protection for Heavy-Duty Printing 29
MAIN COMPONENTS 30
PBMA 30
PBMA Board 30
PEBPNL Board 31
PEBFIL Board 31
Transformer 32
Printer Mechanism (M-5410) 32
Housing 33
CHAP 2-PRINCIPLES OF OPERATION 34
OVERVIEW 38
Summary of Connectors 38
Overview of Printer Mechanism Operation 40
Overview of Circuitry 44
Firmware Overview 45
PRINCIPLES OF OPERATION 46
Power Supply Circuit 46
Reset Circuit 59
Firmware Operation at Reset 63
Address Decoder and Bank Register 66
Carriage Operation 68
Paper Feed 86
Printhead 91
A/D Converter Circuit 97
Host Interface 99
Buffer and Data Flow102
Ribbon-Feed Mechanism107
CHAP 3-OPTIONAL EQUIPMENT108
OPTIONS AVAILABLE FOR THE LQ-500/L-1000109
INTERFACE OPTIONS109
Model 8143 Serial Interface Operation110
FONT MODULE 112
CHAP 4-DISASSEMBLY, ASSEMBLY, AND ADJUSTMENT113
GENERAL REPAIR INFORMATION116
DISASSEMBLY AND ASSEMBLY118
Removal of Printhead118
Removal of Cases119
Removal of Circuit Boards120
Removal of Printer Mechanism123
Disassembly of Printer Mechanism126
ADJUSTMENT138
Platen Gap Adjustment138
Bidirectional Printing Alignment Adjustment140
CHAP 5-TROUBLSHOOTING144
GENERAL TROUBLESHOOTING TECHNIQUES145
Diagnostic Tools146
UNIT REPLACEMENT147
UNIT REPAIR155
Power Supply Circuit155
Control Circuit158
Model 5410 Printer Mechanism158
CHAP 6-MAINTENANCE159
PREVENTIVE MAINTENANCE160
LUBRICATION AND ADHESIVE APPLICATION160
APPENDIX164
INTEGRATED CIRCUITS WITHIN THE LQ-500/L-1000166
CPU µPD7810HG (4B)167
E015KA (6C)172
E05A02LA (7A)175
HM65256BSP (2C)177
STK6981 B (7C)178
NJM2355 (8C)179
TL431 CLPB (58)180
TTL181
EXPLODED DIAGRAMS AND SCHEMATICS182

S.M 26/2/2025