Epson 2080 - LQ B/W Dot-matrix Printer Service Manual
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Epson 2080 - LQ B/W Dot-matrix Printer Service Manual

Impact serial dot matrix printer
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Impact Serial Dot Matrix Printer
EPSON LQ-2080
®
SEDM98002

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Summary of Contents for Epson 2080 - LQ B/W Dot-matrix Printer

  • Page 1  Impact Serial Dot Matrix Printer EPSON LQ-2080 ® SEDM98002...
  • Page 2 The contents of this manual are subject to change without notice. All effort have been made to ensure the accuracy of the contents of this manual. However, should any errors be detected, SEIKO EPSON would greatly appreciate being informed of them.
  • Page 3 2. MAKE CERTAIN THAT THE SOURCE VOLTAGES IS THE SAME AS THE RATED VOLTAGE, LISTED ON THE SERIAL NUMBER/RATING PLATE. IF THE EPSON PRODUCT HAS A PRIMARY AC RATING DIFFERENT FROM AVAILABLE POWER SOURCE, DO NOT CONNECT IT TO THE POWER SOURCE.
  • Page 4 PREFACE This manual describes basic functions, theory of electrical and mechanical operations, maintenance and repair procedures of EPSON LQ-2080. The instructions and procedures included herein are intended for the experienced repair technicians, and attention should be given to the precautions on the preceding page.
  • Page 5 Revision Status Revision Issued Date Description March 08, 1999 First release...

  • Page 6: Table Of Contents

    Revision A Contents Product Description EEPROM Control Circuit ..................29 Sensor Circuits ....................30 ....................8 Specifications Disassembly and Assembly Features ........................ 8 Accessories ......................8 ................. 9 Hardware Specifications Adjustment Printing Method ..................... 9 Printing Specifications ................... 9 ...................... 34 Overview Paper Handling ......................

  • Page 7: Product Description

           PRODUCT DESCRIPTION...

  • Page 8: Specifications

    LQ-2080 Revision A 1.1 Specifications 1.1.2 Accessories Table 1-1. Items Included with the Printer The LQ-2080 is the revised model of the already existing LQ-2070. Enclosed Items Quantity Since the specifications for the both products are mostly common, the information included in this section is limited to the items that are User's manual specific to LQ-2080.

  • Page 9: Hardware Specifications

    LQ-2080 Revision A 1.2 Hardware Specifications NOTE: 1. When the power supply voltage drops to the lower limit, the printer stops printing and then starts printing on that line again more slowly than before. This section also contains information specific to the LQ-2080. For other 2.
  • Page 10 LQ-2080 Revision A Release lever: See the following table. Paper thickness lever: See the following table. Table 1-4. Release Lever Settings Table 1-5. Adjust Lever Setting Position Lever Position Paper path / Feeder Paper / Media Paper Thickness (inch) Setting Paper Thickness (mm) Position Cut sheet...

  • Page 11: Paper Specifications

    LQ-2080 Revision A 1.2.4 Paper Specifications 1.2.6 Electrical Specifications Cut Sheet (Single sheet, Multipart) 120 V Version Input voltage range: AC 99 to 132 V Front Entry Rear Entry <Minimum> <Minimum> Rated current: 1.0 A (max. 3.2 A) Width 3.9 inch 3.9 inch Power consumption: Approximately 35 W 100 mm...

  • Page 12: Safety Approvals

    LQ-2080 Revision A 1.2.9 Safety Approvals 1.2.11 Physical Specifications 120 V version Without options: - Dimensions: 639 mm(W) x 402 mm(D) x 268 mm(H) Safety standards: UL1950, CSA C22.2 No. 950 - Weight: Approximately 13 kg EMI: FCC part15 subpart B class B Including CSF bin 1 CSA C108.8 class B - Dimensions: 639 mm(W) x 469 mm(D) x 380 mm(H)

  • Page 13: Firmware Specifications

    EPSON Roman T 10.5 pt., 8 pt., - 32 pt. (every 2 pt.) PC861 (Icelandic) PC865 (Nordic) PC APTEC(Arabic) EPSON Sans Serif H 10.5 pt., 8 pt., - 32 pt. (every 2 pt.) PC708 (Arabic) PC720 (Arabic) PCAR864 (Arabic) Bar codes...
  • Page 14 EPSON Courier PC 858 EPSON Sans Serif EPSON Prestige EPSON Roman T Italic table* PC 437(US, Standard Europe)* EPSON Script EPSON Sans Serif H PC 850 (Multilingual)* PC 860(Portuguese)* EPSON OCR-B PC 861 (Icelandic)* PC863 (Canadian-French)* EPSON Orator PC 865(Nordic)*...

  • Page 15: Interface Specifications

    (IEEE-1284 level 1 device) Device ID: Pin assignment: The pin assignment (forward channel) is [00H][4DH] the same as for the LQ-2070 except for MFG: EPSON; the function of the pin below: CMD: ESCPL2,PRPXL24,BDC; MDL: LQ-2080; Pin No. Function CLS: PRINTER;...

  • Page 16: Operation Instruction

    LQ-2080 Revision A 1.4 Operation Instruction Table 1-8. Default Setting Menu Item Setting / Value This section provides information on the LQ-2080 control panel buttons, Page length for front tractor 3 inch, 3.5 inch, 4 inch, 5.5 inch, 6 inch, 7 inch, 8 inch, LED, and operations.

  • Page 17: Errors

    LQ-2080 Revision A 1.4.1 Errors Status code indicated by the LEDs Paper out: Table 1-9. Status Code Indicated by the LEDs When printer fails to feed a sheet, it goes paper out error Paper Tear Off / Pause Condensed Font Release lever error: When release lever position is wrong, it goes release lever error.

  • Page 18: Eeprom Initialization

    LQ-2080 Revision A 1.4.2 EEPROM Initialization Areas reset by EEPROM clear operation are as shown in the following Table 1-11. Initialization Area for EERPOM (2/2) tables: Item Factory setting Skip over perforation Table 1-10. Initialization Area for EEPROM (1/2) High speed draft Item Factory setting Input buffer...

  • Page 19: Main Components

    LQ-2080 Revision A 1.5 Main Components The main components for the LQ-2080 are as follows. They are designed for easy disassembly and repair work. C273 Main Board C166 PSB/PSE Board C165 PNL Board Printer Mechanism Housing (upper and lower cases) Figure 1-1.

  • Page 20: C273 Main Board

    LQ-2080 Revision A 1.5.1 C273 Main Board Table 1-12. Relationship between Program ROM and CG Program Destination CG ROM(IC6) Comments ROM(IC10) Standard Character is Standard 8 M bit TDD21 None stored in the Program ROM. Standard Character is Europe 8 M bit TDD25 None stored in the Program ROM.

  • Page 21: Operating Principles

           OPERATING PRINCIPLES...

  • Page 22: Printer Mechanism Operations

    LQ-2080 Revision A 2.1 Printer Mechanism Operations See the LQ-2070 Service Manual. 2.2 Power Supply Operation See the LQ-2070 Service Manual. Operating Principles Printer Mechanism Operations...

  • Page 23: Control Circuit

    LQ-2080 Revision A 2.3 Control Circuit The control circuit consists of the C273 Main Board assembly and C165 PNL board This section describes the major components and explains how the boards work. 2.3.1 Overview of Control Circuit Operation The printer's control circuit includes a TMP96C041BF CPU that runs at 19.66 MHz, an E05B24YB gate array, a 1M bit PS-RAM (8-bit bus, less than 100ns), a bit PROM (8-bit bus, less than 100ns), CG (Standard Version) or CG (NLSP...
  • Page 24 LQ-2080 Revision A The following figure shows the data flow from the host computer to the The table below lists the each function of the main components of the printhead. Data sent from the host computer is converted to image data C273 Main Board.

  • Page 25: System Reset Circuit

    LQ-2080 Revision A 2.3.1 System Reset Circuit Control circuits IC3 and IC4 are initialized when a /RESET signal (LOW level) is output from port 1 (VOUT) of IC2. IC2 monitors the +5 V line on port 3, and resets under the following conditions: 1.

  • Page 26: Printhead Driver Circuit

    LQ-2080 Revision A 2.3.2 Printhead Driver Circuit The standard voltage for the A/D converter is made in ZD1 and input to CPU port 78. Based on this standard voltage, the A/D converter in the CPU operates. Port 74 monitors the +35 V line between R139 and R140 to determine the printhead driver pulse width.

  • Page 27: Cr Motor Driver Circuit

    LQ-2080 Revision A 2.3.3 CR Motor Driver Circuit The carriage motor driver circuit controls the CR motor, using an open-loop, constant drive arrangement. 2-2, 1-2, and W1-2 phases The CR motor driver circuit is shown below. excite the motor. A 2-2 phase step is equivalent to a 1-2 phase step doubled.
  • Page 28 LQ-2080 Revision A Table 2-2. CR Motor Driver Modes Drive Print Speed Excitation Speed Mode Frequency Applications (CPS) Phase (PPS) 4800 High speed draft 7200 Draft, Bit image 6400 High speed draft copy High speed draft power down, Draft copy, 4800 Bit image copy, Bit image High speed draft power down, Draft power down,...

  • Page 29: Pf Motor Driver Circuit

    LQ-2080 Revision A 2.3.4 PF Motor Driver Circuit 2.3.5 EEPROM Control Circuit The figure below shows the PF motor driver circuit. The EEPROM is nonvolatile memory that stores information even if the printer power is off. The figure below shows the EEPROM control circuit.

  • Page 30: Sensor Circuits

    LQ-2080 Revision A 2.3.6 Sensor Circuits Two types of sensors are used in this printer. Release sensors 1 and 2, the PG sensors, and the front PE sensor are momentary switches. The CPU detects conditions of the following sensors: home position (HP) sensor, release sensors 1 and 2, platen gap (PG) sensor, rear and The HP sensor, rear PE sensor, and PW sensor are photo diode front paper end (PE) sensors, paper width (PW) sensor.

  • Page 31: Disassembly And Assembly

           DISASSEMBLY AND ASSEMBLY...

  • Page 32: Disassembly And Assembly

    LQ-2080 Revision A See the LQ-2070 Service Manual. Disassembly and Assembly...

  • Page 33: Adjustment

           ADJUSTMENT...

  • Page 34: Overview

    LQ-2080 Revision A 4.1 Overview NOTE: If you omit this operation, the printer will perform Uni-D print instead of Bi-D. The adjustment items required for the LQ-2080 are the same as for the 5. Double-click “LQSERIES.EXE”. The program starts up and the LQ-2070.
  • Page 35 LQ-2080 Revision A Figure 4-2. Destination Selection Screen Figure 4-3. Main Menu Selection Screen 8. Check the printer to be adjusted for the destination and press the 10. Select “Perform”. The following screen appears. Enter key. Select “No” if you have input a wrong model name in the screen shown in Figure 4-1.

  • Page 36: Bi-D Adjustment

    LQ-2080 Revision A 4.1.2 Bi-D Adjustment The value “0” shown in the screen shown in Figure This adjustment is made after the main board or the CR motor has been 4-5 is the initial value used in the program, which replaced.

  • Page 37: Tpe Level Reset

    LQ-2080 Revision A 4.1.3 TPE Level Reset 6. When this adjustment is completed, if you need to perform another adjustment using this program, you can continue without turning off Make this adjustment when the main board or Top PE Sensor has been the printer.

  • Page 38: Writing The User-Characteristic Data

    LQ-2080 Revision A 4.1.4 Writing the User-characteristic Data Use this function to check the specific records of the printer used by [To check the current status] your customer. Also, you can renew the starting date using this 3. Select “Characteristic Status Code” and press the Enter key. The program.
  • Page 39 LQ-2080 Revision A Figure 4-10. Screen - Setting Starting Year / Month / Date 5. Input a 6-digit data. Be sure to input it correctly since this program does not perform comparison check with the system timer. If you input a wrong data, start from the beginning. Adjustment Overview...

  • Page 40: Troubleshooting

           TROUBLESHOOTING...

  • Page 41: Overview

    LQ-2080 Revision A 5.1 Overview 5.2.4 The Error codes with Indicators and Buzzer Error codes indicated by the LEDs This chapter contains information necessary for troubleshooting. Like other chapters, this chapter does not include the information common to Table 5-1. Error Code Indicated by the LEDs the LQ-2070.

  • Page 42: Unit Level Troubleshooting

    LQ-2080 Revision A 5.3 Unit Level Troubleshooting Table 5-2. Repairing the C272MAIN Board (1/3) The information for this section is the same as for the LQ-2070 except Problem Cause Checkpoint Solution for the point below: The printer does Reset IC2 is Check the voltage Replace IC2.
  • Page 43 LQ-2080 Revision A Table 5-3. Repairing the C272MAIN Board (2/3) Table 5-4. Repairing the C272MAIN Board (3/3) Problem Cause Checkpoint Solution Problem Cause Checkpoint Solution • Check input signal waveform The printer does CR1 is Check the oscillator signal at If the signal is Paper feed is IC3 is defective...

  • Page 44: Repairing The Printer Mechanism

    LQ-2080 Revision A 5.6 Repairing the Printer Mechanism The information for this section is also the same as for the LQ-2070 except for the point below. Point: Table 5-8 (LQ-2070 Service Manual) <LQ-2070> <LQ-2080> 39.3 29.6 ohms ohms Troubleshooting Repairing the Printer Mechanism...

  • Page 45: Maintenance

           MAINTENANCE...

  • Page 46: Maintenance

    LQ-2080 Revision A See the LQ-2070 Service Manual. Maintenance...

  • Page 47: Appendix

           APPENDIX...

  • Page 48: Eeprom Address Map

    LQ-2080 Revision A 7.1 EEPROM Address Map Table 7-2. EEPROM Address Map (2/7) Q-pit Factory Address Data Data Format NOTE: The data of two or more bytes are assigned in such way as data setting lower byte to lower address, higher byte to higher address. 04H, 05H Page length for rear 1 to 22x360 (by 1/360 inch)
  • Page 49 LQ-2080 Revision A Table 7-3. EEPROM Address Map (3/7) Table 7-4. EEPROM Address Map (4/7) Q-pit Factory Q-pit Factory Address Data Data Format Address Data Data Format data setting data setting b0: Software Condensed 0: Off Software 0: ESC/P2, 1: On (Off) (Off) 0 slash...
  • Page 50 LQ-2080 Revision A Table 7-5. EEPROM Address Map (5/7) Table 7-6. EEPROM Address Map (6/7) Q-pit Factory Q-pit Factory Address Data Data Format Address Data Data Format data setting data setting b0: LOAD function Panel mask Starting Year 0 - 99 (the last two figures of pattern 1 b1: EJECT function Anno Domini)

  • Page 51: Connector Summary

    LQ-2080 Revision A 7.2 Connector Summary Table 7-7. EEPROM Address Map (7/7) Q-pit Factory Address Data Data Format data setting The information in this section is common to the LQ-2070 Service Manual except for the point below: Area 2 0: Standard version Point: Figure A-1 (LQ-2070 Service Manual) Market 1: NLSP version...

  • Page 52: Component Layout

    LQ-2080 Revision A 7.3 Component Layout Figure 7-1. C273 Main Board Component Layout - Component Side Appendix Component Layout...
  • Page 53 LQ-2080 Revision A Figure 7-2. C273 Main Board Component Layout - Soldering Side Appendix Component Layout...

  • Page 54: Circuit Diagram

    LQ-2080 Revision A 7.4 Circuit Diagram See the following page for the circuit diagram for the C273 Main Board. Appendix Circuit Diagram...

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