Epson 2070 - LQ B/W Dot-matrix Printer- User Manual

Epson 2070 - LQ B/W Dot-matrix Printer

Epson 2070 - LQ B/W Dot-matrix Printer– User Manual, read for free online in PDF format. We hope this helps you resolve any issues you may have. If you have further questions, please contact us through the contact form.

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Table of Contents:

  • Page 2 – NOTICE
  • Page 4 – PREFACE; The contents of this manual are subject to change without notice.
  • Page 5 – REVISION SHEET; Revision; st issued
  • Page 6 – TABLE OF CONTENTS
  • Page 7 – CHAPTER 1 Product Description; Table of Contents; Hardware Specifications
  • Page 8 – List of Figures
  • Page 9 – List of Tables; Table 1-14. Specifications for Continuous Paper (Single Sheet and
  • Page 10 – Features
  • Page 11 – Figure 1-1 Exterior View of the
  • Page 12 – Items included in the printer; carton; Table 1-1 Items Included with the Printer; Part Number; Table 1-3 Optional Units; Description
  • Page 13 – Print
  • Page 14 – Copy capability; Table 1-4 Print Speed and Printable Columns; Acoustic noise
  • Page 15 – Table 1-6 Paper Path and Paper Types
  • Page 16 – Table 1-7 Paper Thickness Lever Positions
  • Page 17 – This; Cut Sheets; Table 1-9 Specifications for Cut Sheets
  • Page 18 – Printable area; Table 1-10 Printable Area for Cut Sheets; Abbreviations; or more; BM; Figure 1-3 Printable Area; for; Sheets ‘
  • Page 19 – Envelopes and Card Stock; Table 1-11 Specifications for Envelopes
  • Page 20 – Table 1-13 Printable Area for Envelopes and Card Stock; Pw; Figure 1-4 Printable Area for Envelopes and Card Stock
  • Page 21 – Continuous Paper; Table 1-14 Specifications for Continuous Paper (Single Sheet and; Front Entry
  • Page 22 – Table 1-15 Printable Area for Continuous Paper; Figure 1-5 Printable Area for Continuous Paper
  • Page 23 – Continuous Paper with Labels; Table 1-16 Specifications for Continuous Paper with Labels; . Printable size and area
  • Page 24 – Roll Paper; Table 1-17 Specifications for Roll Paper; Table 1-18 Printable Area for Roll Paper; Figure 1-7 Printable Area for Roll Paper
  • Page 25 – Table 1-19 Statistics on the Ribbon; Table 1-21 Electrical Specifications for the 220/240 V Version; Item
  • Page 26 – Table 1-22 Environmental Requirements; During printing on; Table 1-23 Reliability Statistics; million lines (except; Table 1-24 Safety Information for Printer Models
  • Page 27 – Product Description; Table 1-25 CE Marking
  • Page 28 – Table 1-28 Capacity of the Stacker; Single sheets; Envelopes; Table 1-29 Environmental Conditions; Operating; Temperature; envelopes, and card stock
  • Page 29 – Firmware Specifications; Table 1-30 Character Tables; Version
  • Page 31 – Figure 1-8 Data Transmission Timing; Parameter
  • Page 32 – Table 1-33 Pin Assignments for Reverse Channel; Pin
  • Page 34 – In this; Table 1-34 Paper Handling Sequence 1; Printer status; Table 1-35 Paper Handling Sequence
  • Page 35 – The release lever is set to continuous paper; Table 1-36 Paper Handling Sequence 3; Table 1-37 Paper Handling Sequence 4
  • Page 36 – Table 1-38 Paper Handling Sequence 5
  • Page 37 – Table 1-40 PW Sensor Operation
  • Page 38 – Operating Instructions; Panel Operations; for various printer; ‘in; Figure 1-9 Control Panel; Operation in normal mode; Table 1-41 Operation in Normal; Mode
  • Page 39 – Operations at power on; LF I FF; Operation in default setting mode; Button; indicates the beeper sounds for 100 ms with an interval of 100
  • Page 41 – Figure l-n Hexadecimal Printout
  • Page 42 – Clear Function; Font and Tear Off /Bin buttons while turning; Initialization Settings; Setting
  • Page 43 – Pause
  • Page 45 – MAIN Board Assembly; These boardshave two AC input voltage ratings: 120VAC; Board Assembly
  • Page 46 – Figure
  • Page 47 – PRINTER MECHANISM OPERATION
  • Page 49 – PRINTER MECHANISM OPERATION; arranged on the printhead in 2 columns.; P l a t e n; Operating Principles
  • Page 50 – Table 2-1. CR Motor Assembly Specifications; Category; Type; Figure 2-2 Carriage Movement Mechanism; Operation Principles
  • Page 51 – between the platen gap and the print speed.; Figure 2-3 Platen Gap Adjustment Lever
  • Page 52 – Figure 2-4 Release Switch
  • Page 53 – Friction Advance Method; Figure 2-5 Friction Advance Operation Using the Top Entrance
  • Page 54 – Push Tractor Method
  • Page 56 – Pull Tractor Method
  • Page 60 – Down
  • Page 64 – Belt driven pulley; Figure 2-21 Ribbon Advance Mechanism
  • Page 65 – POWER SUPPLY OPERATION; Board; Table 2-6 Power Supply Output Voltages and Applications; Applications; Figure 2-22 shows a block diagram of the power supply circuitry.; Figure 2- 22 Power Supply Circuit Block Diagram
  • Page 66 – Power Switch Circuit; This circuit is shown below.; Figure 2-23 Power Switch Circuit; GND; Figure 2-24 Over Voltage Protection Circuit
  • Page 67 – +35 V Constant Voltage Control Circuit; The +35 V constant voltage control circuit is illustrated below.; Figure 2-25 +35 V Line Constant Voltage Control Circuit; Figure 2-26 +35 V Line Overload Detection Circuit
  • Page 68 – +35 V Line Over Current Protection Circuit; The +35 V line over current control circuit is illustrated below.; +5 V Line Over Current Protect Circuit; +5 V line over current control circuit is shown below.; Figure 2-27 +35 V Line Over Current Protection Circuit; Figure 2-28 +5 V Line Over Current Protection Circuit
  • Page 69 – +5 V Line Constant Voltage Control Circuit; The +5 V line constant voltage control circuit is shown below.; Figure 2-29 +5 V Line Constant Voltage Control Circuit
  • Page 70 – Overview of Control Circuit Operation; Figure 2-30 Control Circuit Block Diagram
  • Page 71 – Table 2-7 Functions of the Main Board; IC; Figure 2-31 Data Flow
  • Page 72 – Figure 2-33 Reset Signal Output Timing; Figure 2-32 Reset Circuite; Figure 2-34 Printhead Drive Circuit
  • Page 73 – The CR motor driver circuit is shown below.; Table 2-8 CR Motor Driver Modes
  • Page 74 – The figure below shows the PF motor driver circuit.; CPU; EEPROM; Figure 2-37 EEPROM Control Circuit
  • Page 75 – Figure 2-38 Sensor Circuit
  • Page 76 – PRINTER DISASSEMBLY AND ASSEMBLY
  • Page 79 – Follow the precautions below for disassembly or assembly.; WARNING; To maintain efficient printer operation:; Tool; All tools are commercially available.; Table 3-2. Equipment Required for Maintenance; Disassembly and Assembly
  • Page 80 – Table 3-3. Inspection Check List for the Repaired Printer
  • Page 81 – Top; Pan; Body; Figure 3-1 Screw Types and Abbreviations
  • Page 82 – CAUTION; Figure 3-2 Flowchart for Disassembling the Printer
  • Page 83 – Note; Figure 3-3 Before Starting the Disassembly Procedure
  • Page 84 – Remove the panel board assembly from the upper housing assembly.; Assembly Notes; Figure 3-4 Removing the Panel Board Assembly; Lock Cover for CN 1; Figure 3-5 Lock Cover for CN1 and the FFC
  • Page 85 – The tightening torque for the 2 CBS screws (3; Figure 3-6 Removing the Printhead
  • Page 86 – Disconnect the connector cable for the HP sensor.; Assembly Note; Notice the direction for mounting the HP sensor.; Figure 3-8 Removing the HP Sensor
  • Page 87 – Mount the; photo sensor to the bottom line of the groove.; Figure 3-10 Mounting Position for the PW Sensor Assembly
  • Page 88 – Adjust the platen gap. Refer to Chapter 4.; Figure 3-11 Releasing the Locks for the Bushings
  • Page 89 – Removing the Upper Housing Assembly; Remove 4 CBB screws (4; The tightening torque for the CBB (4; Figure 3-14 Removing the Upper Housing Assembly
  • Page 90 – The tightening torque for the 2 CR mounting screws =; Figure 3-15 Removing the CR Motor Assembly
  • Page 91 – The tightening torque for the printer mechanism mounting screw =; Figure 3-16 Removing the Printer Mechanism
  • Page 92 – The tightening torque for the CB and CBS screws (3; CB Screw; Figure 3-17 Removing the PF Motor
  • Page 93 – Figure 3-18 Removing the PG Sensor Assembly
  • Page 94 – Remove 1 CBS screw (3; Figure 3-19 Removing the Right Frame Assembly; Figure 3-20 Removing the Right Sub Frame
  • Page 95 – Adjust the bidirectional print alignment. Refer to Chapter 4.; Figure 3-21 Engaging Gears 1
  • Page 96 – The tightening torque for the CBS screws (3; Be careful operating the release lever. Frequent operation of the; Figure 3-22 Engaging Gears 2; Figure 3-23 Engaging the Tractor Clutch Cam
  • Page 97 – The tightening torque for the CBS screw (3; Figure 3-24 Removing the Left Frame Assembly
  • Page 98 – Figure 3-25 Removing the Driven Pulley Holder; Figure 3-26 Removing the RD Assembly; Figure 3-27 Engaging Gears for the RD Assembly
  • Page 99 – Figure 3-28 Disconnecting the FFCs
  • Page 100 – Figure 3-31 Installing the Oil Pads in the CR Assembly; Timing Belt; Figure 3-30 Inserting the Timing Belt; Figure 3-32 Assembling the Rear CR Guide Shaft
  • Page 101 – Remove the rear PE sensor after disconnecting the connector.; Figure 3-33 Removing the Rear PE Sensor Assembly; Figure 3-34 Removing the Front PE Sensor Assembly
  • Page 102 – Figure 3-35 Removing the C186 Main Board Assembly
  • Page 103 – The tightening torque for the CBB screw (3; Figure 3-36 Removing the C166 PSB/E Board Assembly
  • Page 104 – Disassembly and Assembly of CSF Bin 1; Remove the 3 CPB tight (3; Figure 3-38 Releasing the Clips for the CSF Gear Cover
  • Page 105 – Figure 3-39 Cable Alignment
  • Page 106 – Disassembling Paper Support Block Assembly
  • Page 107 – Figure 3-44 Removing the Paper Support Block Assembly; P ap er Lo ad in g Ro ller Co ve r; Figure 3-45 Removing the Paper Loading Roller Cover Assembly
  • Page 108 – Figure 3-46 Removing the Paper Eject Assembly Cover; Figure 3-47 Assembling the Paper Eject Assembly Cover
  • Page 109 – Removing the Paper Eject Assembly Cover; Figure 3-48 Removing the Gear Train Cover; Figure 3-49 Engaging 5 Gears
  • Page 110 – Disassembly and Assembly of CSF Bin 2; Remove the following 5 gears and 1 spring from the right CSF frame.; Figure 3-50 Removing 1 E-ring and 2 CTBS Screws; Figure 3-51 Removing the CSF Roller Cover
  • Page 111 – Disassembling the Paper Support Block Assembly; Remove both paper feed rollers from the paper support assemblies.
  • Page 113 – ADJUSTMENT OVERVIEW
  • Page 114 – ADJUSTMENT OVERVIEW; Table 4-1 Required Adjustments; means adjustment is required.; The following table shows the tools required for each adjustment.; Table 4-2 Required Adjustment Tools; the printer to the destination factory settings.; Adjustment
  • Page 115 – ADJUSTING AND RESETTING THE PRINTER; Move the printhead to 5th column position.; Figure 4-1 Removing the Ribbon Mask; Figure 4-2 Setting the PG Adjust Lever
  • Page 117 – Bidirectional Print Alignment Adjustment; GWBASIC; Figure 4-5 Machine Select Menu
  • Page 119 – Figure 4-10 Guide Sheet for Bi-d Adjustment
  • Page 120 – Figure 4-11 Machine Select Menu
  • Page 122 – TROUBLESHOOTING INFORMATION
  • Page 123 – -1. Printhead Coil Resistance Test Points; Test; Test Method; the printhead after the printer is; Figure 5-1 Printhead Connected Pin Alignment; Troubleshooting
  • Page 124 – Table 5-2 Sensor Test Points; Test Pin; Meter Reading
  • Page 125 – Table 5-3 Motor Test Points; Error Codes with Indicators and Buzzer; Table 5-4 Indicators and Buzzer
  • Page 126 – UNIT LEVEL TROUBLESHOOTING; Table 5-5. Symptoms and Problem Descriptions; Symptom; Paper does not feed at all.; Flowchart 3
  • Page 127 – Abnormal CR Operation; Figure 5-2 Flowchart1
  • Page 128 – Abnormal Paper Feed Operation 1; Figure 5-3 Flowchart 2
  • Page 130 – Abnormal Control Panel Operation; Figure 5-5 Flowchart 3
  • Page 131 – Figure 5-6 Flowchart 4
  • Page 132 – REPAIRING C166 PSB/PSE BOARD ASSEMBLY; OPERATE; Problem; Cause; The diode bridge DB1
  • Page 134 – Check the voltage at pin 12 of IC51.
  • Page 135 – REPAIRING THE C186 MAIN BOARD ASSEMBLY; Table 5-7. Repairing the C186 MAIN Board Assembly; Reset IC10 is defective.
  • Page 136 – IC12 or IC1 is defective.
  • Page 138 – REPAIRING THE PRINTER MECHANISM; Table 5-8. Repairing the Printer Mechanism; When the printer is
  • Page 141 – is loaded
  • Page 142 – PREVENTIVE MAINTENANCE
  • Page 143 – PREVENTIVE MAINTENANCE; Do; APPLYING LUBRICATION; Lubrication must be applied during the reassembly process.; For lublication points, refer to the figure on the next page.; Maintenance
  • Page 147 – Appendix; A.3 CONNECTOR SUMMARY
  • Page 149 – A.1 EXPANDED PRODUCTION COMMANDS; Write Bidirectional Adjustment Data to EEPROM
  • Page 150 – A.2 EEPROM ADDRESS MAP; Address; Data; Reserved
  • Page 152 – datum is fixed by each printer hardware in the factory.
  • Page 153 – A.3 CONNECTOR SUMMARY; P r i n t e r M e c h a n i s m; B o ar d A s s y . , C 1 8 6 M A I N
  • Page 164 – Parts Price List Name
  • Page 165 – EPSON
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EPSON TERMINAL PRINTER

LQ-2070

SERVICE MANUAL

EPSON

4006244

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Summary

Page 2 - NOTICE

NOTICE • All right reserved. Reproduction of any part of this manual in any form wharsoever 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 m...

Page 4 - PREFACE; The contents of this manual are subject to change without notice.

PREFACE This manual describes functions, theory of electrical and mechanical operations, maintenance, and repair ofthe FX-2170. The instructions and procedures included herein are intended for the experienced repairtechnician, and attention should be given to the precautions on the preceding page. T...

Page 5 - REVISION SHEET; Revision; st issued

REVISION SHEET Revision Issued Date Revision Page Rev. A April 8,1996 1st issued

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