Epson LX-850- User Manual

Epson LX-850

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Table of Contents:

  • Page 2 – NOTICE
  • Page 3 – PRECAUTIONS; DANGER
  • Page 4 – PREFACE
  • Page 5 – REVISION TABLE; REVISION; st issue
  • Page 6 – TABLE OF CONTENTS
  • Page 8 – LIST OF TABLES; interface Options
  • Page 9 – F E A T U R E S; Model
  • Page 11 – S P E C I F I C A T I O N S; Hardware Specifications
  • Page 12 – Paper Specifications See Table 1-3 through 1-6; Table 1-4. Continuous Paper Specifications
  • Page 13 – long; Size
  • Page 14 – below show the printing area for cut sheets.; P r i n t a b l e a r e a; ABC; Figure 1
  • Page 15 – a r e a; XYZ; Figure 1-4. Printing Area for Continuous Paper
  • Page 16 – Figure
  • Page 18 – Firmware Specifications
  • Page 20 – I N T E R F A C E O V E R V I E W; Table 1-11. Connector Pin Assignments and Signal Functions; PE
  • Page 22 – HIGH
  • Page 23 – . 4 D I P S W I T C H A N D J U N I P E R S E T T I N G S; is read only at power on or upon receipt of the I NIT signal.; Switch 1; the switch is set for the Graphic table, at power on it defaults to; Table 1-15. International Character Set Selection; signal; printer select control is ignored.
  • Page 24 – F U N C T I O N; S H E E T L O A D I N G A N D S H E E T E J E C T I O N; Cut Sheet Loading And Ejection
  • Page 25 – if the input
  • Page 26 – O P E R A T I N G I N S T R U C T I O N S; To; begin printing the self-test using the; switch settings are printed.; and subsequently, current DIP
  • Page 28 – Beeps indefinitely until
  • Page 30 – M A I N C O M P O N E N T S; The main components are:; T A; MA board
  • Page 31 – Board; The use of the; Main Control Board; Control Panel; The
  • Page 32 – The M-3D 10 printer mechanism was developed specifically
  • Page 34 – P R I N C I P L E S O F O P E R A T I O N
  • Page 35 – LIST OF FIGURES; Printer; DC Power
  • Page 36 – Relationship between Head Driver Voltage and; Reference
  • Page 37 – O V E R V I E W
  • Page 38 – D 10 Printer Mechanism; B o a r d; CR; I I; TAMA Board; F i l t e r; O p t i o n a l
  • Page 39 – Figure 2-2. Printer Mechanism Block Diagram
  • Page 40 – IK
  • Page 42 – Front; Lever; Release Sensor Mechanism
  • Page 43 – This printer has the following motors:; Carriage Motor; An; Paper; the motor through an open loop.; Platen; ‘Core
  • Page 44 – diagram of the; Board Circuit; Block Diagram
  • Page 46 – Filter Unit (which combines; Power Supply Circuit Block Diagram
  • Page 47 – on the
  • Page 48 – 2V DC Power Supply Circuit
  • Page 49 – Figure 2-15. Rectifier and Smoothing Circuit
  • Page 50 – KHz; switching pulse based on the external; being generated, so that; EA output will be; pulse will be output.; Switching Regulator Circuit
  • Page 52 – in the; V r e f
  • Page 53 – Switching Pulse Output; The output of the error amplifier in; Figure 2-19. output Transistor Drive Waveform
  • Page 55 – DC Power Supply
  • Page 56 – RESET; pulse; POWER SW
  • Page 57 – via D 15 and R82, and the reset condition is entered.
  • Page 59 – CPU; CPU phase da; D a t a; drives the carriage motor with a stabilized current.; Phase; Figure 2-25. Carriage Drive Circuit Block Diagram
  • Page 60 – Figure 2-26. Carriage Motor Drive Circuit
  • Page 61 – Gp; NOTE: Phase CD is equivalent to the above.
  • Page 62 – Input
  • Page 63 – -2 phase excitation to be on; INA; i n p u t; PhaseA
  • Page 64 – Reference Voltage Generation Circuit; shown in; Figure 2-32. Reference Voltage Generation Circuit; Reference Voltage
  • Page 65 – Constant Current Drive Circuit; Figure 2-33. Constant Current Control Circuit
  • Page 66 – km; d r o p s
  • Page 68 – Excitation System
  • Page 69 – I Home
  • Page 70 – P r i n t i n g A r e a; Acceleration Area; Figure 2-37. Printing Area and Printing Timing; This unit does not employ a print timing signal; in the printing area, in which case the carriage will stop.
  • Page 71 – P a p e r F e e d; This section describes the paper-feed operation.; Paper Feed Motor
  • Page 72 – Gear’; Paper-Feed Motor Specifications
  • Page 73 – Paper-Feed Motor Drive Circuit; GA; GP
  • Page 75 – This section describes the; Printing Operation; wire; Dot Wire; Specifications
  • Page 76 – Drive Circuit; Drive Circuit Block Diagram
  • Page 77 – I K; HEAD; Driving Waveforms
  • Page 78 – CUP; AV
  • Page 80 – At this time, the CPU, by reading address
  • Page 81 – in line with
  • Page 82 – R i b b o n - f e e d M e c h a n i s m; D i r e c t i o n o f; Gear Train; configuration is such that the ribbon can feed endlessly.; Ribbon Pressure; Ribbon Transmission Gear
  • Page 83 – CUT SHEET FEEDER; Removal of Sprocket’s Intermediate Gear
  • Page 85 – I N T E R F A C E O P T I O N S; Description
  • Page 86 – DIP Switch Settings
  • Page 89 – Cut Sheet Feeder C80612* Specifications; tested prior to regular use. Paper with a
  • Page 90 – Area
  • Page 92 – . 2 . 2 C u t S h e e t F e e d e r O p e r a t i n g P r i n c i p l e s; M o d e; NOTE: This command should be input when paper is loaded.
  • Page 94 – Cut Sheet Feeder Disassembly and Reassembly; for disassembly and reassembly, show an exploded view of the; CAUTION; For safety, gloves should be worn during disassembly and assembly.; W A R N I N G
  • Page 95 – Side Cover; Removal; Paper Loading Shaft; Figure 3-6. Paper Loading Roller Shaft Removal
  • Page 100 – P U L L T R A C T O R; The optional pull tractor; . 3 . 1 P u l l T r a c t o r O p e r a t i o n; ion
  • Page 101 – Pull Tractor Disassembly and Reassembly; ear; Sprocket’s Intermediate Gear and Related Parts
  • Page 102 – Sprocket Shaft; Roller Removal
  • Page 103 – Reassembly; Marks to ‘be Matched; Figure 3-17. Direction for Insertion of Sprocket Wheels; goes on
  • Page 107 – GENERAL REPAIR INFORMATION; C A U T I O N
  • Page 108 – Washer
  • Page 109 – D I S A S S E M B L Y A N D R E A S S E M B L Y
  • Page 110 – Disconnect the head cable from the connector on the; NOTE; For the European version of the printer, a net is mounted on the
  • Page 111 – Remove the sheet guide unit, printer cover, and paper feed knob.
  • Page 112 – CN3 on the; Before reassembling the upper casing, prepare the; in such a way that it can be connected to the Panel; Control
  • Page 113 – anel
  • Page 114 – Board Removal; are
  • Page 116 – Remove the cover of the paper tension unit.; Opent the Cover; Figure 4-12. Removal of Paper Tension Unit Cover; cover
  • Page 117 – Remove the; Spring Removal
  • Page 118 – R E Q U I R E D A D J U S T M E N T
  • Page 119 – Loosen tabs 1 and 2, and
  • Page 120 – from the printer mechanism. Figure A-1 9 shows an; rollers
  • Page 121 – Spacer; Figure 4-19. Removal of Paper Guide Plate
  • Page 122 – ng; the paper feed reduction
  • Page 123 – Figure 4-23. Removal of The Release Lever
  • Page 124 – Notch; S e n s o r
  • Page 125 – Figure 4-27. Bottom View of Printer Mechanism; Figure 4-28. Removal of Carriage Guide Shaft Ground Plate
  • Page 126 – Turn the printer mechanism over so that it is again; face up. Rotate the lever on the left side of the; Frame; Figure 4-29. Removal of Carriage Guide Shaft; Plate; Figure 4-30. Removal of Carriage Guide Plate
  • Page 127 – NOTES FOR REASSEMBLY; Guide Shaft; Figure 4-31. Carriage Guide Shaft and Head Adjust Lever
  • Page 128 – Carriage Motor Tabs; Figure 4-32. Carriage Motor Frame Removal
  • Page 129 – NOTES FOR REASSEMBLY:; The following applies to E-ring reattachment:
  • Page 130 – Figure 4-35. Removal of Ribbon Gear Cover
  • Page 131 – Tractor Set L
  • Page 133 – A D J U S T M E N T; Platen Gap Adjustment
  • Page 134 – Adjust Lever; Carriage Guid; Figure 4-41. Carriage Guide Shaft Lever Movement
  • Page 136 – that should be checked for.; U N I T R E P L A C E M E N T; Name of Unit; Fuse
  • Page 138 – F 1 on
  • Page 140 – R e p l a c e t h e; Yes
  • Page 143 – Panel Operation
  • Page 145 – U N I T R E P A I R
  • Page 146 – Step Motor Driver
  • Page 148 – Check point
  • Page 152 – or
  • Page 153 – P r i n t e r M e c h a n i s m R e p a i r
  • Page 157 – optimal and long-term printer performance and and minimizes the; PREVENTIVE MAINTENANCE; Type; Capacity
  • Page 160 – Case Outline Drawing
  • Page 162 – board; RAM 8 K x 8 bit
  • Page 163 – Zero; Vcc; SS
  • Page 167 – CPU Timing
  • Page 168 – Pin Diagram
  • Page 171 – R O W
  • Page 173 – b l o c k d i a g r a m i s s h o w n i n F i g u r e A - 1 3 s h o w s
  • Page 174 – A.2 EXPLODED DIAGRAMS AND; The exploded and schematic diagrams shown in; AC; S C H E M A T I C S; Figures A-1 4 to A-22 are provided as additional; Figure A-1 4. TA Filter Unit Circuit Diagram
  • Page 175 – FF SW; GREEN; L P; LP
  • Page 176 – Board Component Layout
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TECHNICAL MANUAL

EPSON

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Summary

Page 2 - NOTICE

NOTICE “ All rights reserved. of any part of this manual in any from whatsoever without SEIKO EPSON’s express written permission is forbidden. ● The contents of this manual are subject to change without notice. All efforts have been made to ensure the accuracy of the contents of this manual. However...

Page 3 - PRECAUTIONS; DANGER

REV.-A PRECAUTIONS Precautionary notations throughout the text are categorized relative to 1) personal injury, and 2) damage to equipment: D A N G E R Signals a precaution which, if ignored, could result in serious or fatal personal injury. Great caution should be exercised in performing procedures ...

Page 4 - PREFACE

PREFACE T h i s m a n u a l d e s c r i b e s f u n c t i o n s , t h e o r y o f e l e c t r i c a l a n d m e c h a n i c a l operations, maintenance, and repair of the LX-8 10/850. T h e i n s t r u c t i o n s a n d p r o c e d u r e s i n c l u d e d h e r e i n a r e i n t e n d e d f o r t h ...

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