Impact Serial Dot Matrix Printer EPSON LQ-2080 ® SEDM98002
Notice: All rights reserved. No part of this manual may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of SEIKO EPSON CORPORATION. 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.
PRECAUTIONS Precautionary notations throughout the text are categorized relative to 1)Personal injury and 2) damage to equipment. DANGER Signals a precaution which, if ignored, could result in serious or fatal personal injury. Great caution should be exercised in performing procedures preceded by DANGER Headings. WARNING Signals a precaution which, if ignored, could result in damage to equipment.
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. The chapters are organized as follows: CHAPTER 1. PRODUCT DESCRIPTIONS Provides a general overview and specifications of the product. CHAPTER 2.
Revision Status Revision Issued Date Description A March 08, 1999 First release
Revision A Contents Product Description Specifications ................................................................................................. 8 Features ................................................................................................................ 8 Accessories .......................................................................................................... 8 Hardware Specifications .................................................................................
PRODUCT DESCRIPTION
LQ-2080 Revision A 1.1 Specifications 1.1.2 Accessories The LQ-2080 is the revised model of the already existing LQ-2070. Since the specifications for the both products are mostly common, the information included in this section is limited to the items that are specific to LQ-2080. For the rest of the information, refer to the LQ-2070 Service Manual. 1.1.
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. 2. When the head temperature rises to the upper limit, the printer stops printing. When the head temperature falls to the normal level, the printer start printing again more slowly than before. This section also contains information specific to the LQ-2080.
LQ-2080 Revision A Release lever: See the following table. Paper thickness lever: Table 1-4. Release Lever Settings Lever Position Paper path / Feeder See the following table. Table 1-5. Adjust Lever Setting Position Paper / Media Paper Thickness (inch) Setting Position Minimum Maximum 0 0.0024 0.0047 over 0.06 up to 0.12 1 0.0047 0.0074 over 0.12 up to 0.
LQ-2080 Revision A 1.2.4 Paper Specifications Cut Sheet (Single sheet, Multipart) Width 1.2.6 Electrical Specifications Front Entry Rear Entry 3.9 inch 100 mm 3.9 inch 100 mm Front Entry Rear Entry Card Width 3.9 inch 100 mm 7.8 inch 200 mm 3.9 inch 100 mm 7.8 inch 200 mm Length 5.8 inch 148 mm 7.8 inch 200 mm 3.9 inch 100 mm 7.
LQ-2080 Revision A 1.2.9 Safety Approvals 1.2.11 Physical Specifications 120 V version Safety standards: UL1950, CSA C22.2 No. 950 EMI: FCC part15 subpart B class B CSA C108.8 class B Safety standards: EN60950 (TUV) EMI: EN55022 (CISPR pub.
LQ-2080 Revision A 1.3 Firmware Specifications International character set (14 countries and legal) U.S.A. U.K. Italy Norway Latin America This section describes the firmware specifications for the LQ-2080. 1.3.
LQ-2080 Revision A Table 1-6.
LQ-2080 Revision A 1.3.2 Interface Specifications 1.3.2.2 Parallel Interface (Reverse Channel) This section only provides information which is specific to the LQ-2080. For other information, refer to the LQ-2070 Service Manual. 1.3.2.1 Parallel Interface (Forward Channel) Transmission mode: IEEE-1284 compatibility mode Signal level: TTL compatible (IEEE-1284 level 1 device) Pin assignment: Pin No.
LQ-2080 Revision A 1.4 Operation Instruction Table 1-8. Default Setting Menu Item Setting / Value*1 Page length for front tractor Page length for rear tractor 3 inch, 3.5 inch, 4 inch, 5.5 inch, 6 inch, 7 inch, 8 inch, 8.5 inch, 11 inch, 70/6 inch, 12 inch, 14 inch, 17 inch Skip over perforation On, Off Auto tear off On, Off Operations at power on Auto line feed On, Off Turning on the printer while pressing panel buttons executes the functions shown in the following table.
LQ-2080 Revision A 1.4.1 Errors Status code indicated by the LEDs Table 1-9.
LQ-2080 Revision A 1.4.2 EEPROM Initialization Areas reset by EEPROM clear operation are as shown in the following tables: Table 1-10. Initialization Area for EEPROM (1/2) No. Item Factory setting Table 1-11. Initialization Area for EERPOM (2/2) No.
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.
LQ-2080 Revision A 1.5.1 C273 Main Board Table 1-12. Relationship between Program ROM and CG Destination Standard Program ROM(IC10) 8 M bit TDD21 Europe 8 M bit TDD25 TAIWAN 4 M bit TDD27 Korea 4 M bit TDD30 China 4 M bit TDD29 CG ROM(IC6) Comments Standard Character is stored in the Program ROM. None None Standard Character is stored in the Program ROM. 32 M bit M320A19 Program ROM and CGROM are completely independent.
OPERATING PRINCIPLES
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.
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. 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 Version). It oversees control of all the components in the printer.
LQ-2080 Revision A The following figure shows the data flow from the host computer to the printhead. Data sent from the host computer is converted to image data and transmitted to the printhead through the gate array. The table below lists the each function of the main components of the C273 Main Board. Table 2-1.
LQ-2080 Revision A 2.3.1 System Reset Circuit IC 3 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: + 5 V 1. When the power supply is turned on, a /RESET signal is output. /RESET is canceled when the +5 V line goes up to 4.2 V, and then 100 ms passes. 2. When the +5 V line goes below +4.2 V, a /RESET signal is output.
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. Using the monitored voltage, the CPU converts the voltage to a digital value and decides the printhead driver pulse width, and then transports the data to the gate array via CPU port 15.
LQ-2080 Revision A 2.3.3 CR Motor Driver Circuit The CR motor driver circuit is shown below. S L A 7 0 2 4 M (IC 1 1 ) 8 /IN A A 1 1 2 C P U (IC 4 ) 6 1 P G O 0 5 3 1 7 P G O 1 2 P G O 2 P G O 3 4 1 6 3 G A (IC 3 ) 1 C R R F A 0 /IN B B /IN -B -B C R A 1 8 3 1 1 4 C R -A C R B C R -B The SLA7024M (IC11) CR motor driver circuit detects and regulates the amount of current flowing in the carriage motor coil.
LQ-2080 Revision A Table 2-2.
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.
LQ-2080 Revision A 2.3.6 Sensor Circuits The CPU detects conditions of the following sensors: home position (HP) sensor, release sensors 1 and 2, platen gap (PG) sensor, rear and front paper end (PE) sensors, paper width (PW) sensor.
DISASSEMBLY AND ASSEMBLY
LQ-2080 Revision A See the LQ-2070 Service Manual.
ADJUSTMENT
LQ-2080 Revision A 4.1 Overview NOTE: The adjustment items required for the LQ-2080 are the same as for the LQ-2070. Therefore, see Table 4-1 in the LQ-2170 Service Manual and perform any necessary adjustment after disassembling/assembling the printer. C A U T IO N If you omit this operation, the printer will perform Uni-D print instead of Bi-D. 5. Double-click “LQSERIES.EXE”. The program starts up and the screen below appears.
LQ-2080 Revision A < * > < * > < * > E P S O N S ID M P r in te r S e r v ic e P r o g r a m b o o t p ro c e s s < *> < *> < *> < * > < * > < * > E P S O N S ID M S e le c t th e d e s tin a tio n . E A I E A I(L a tin ) E A L E S P E H K E T T E S C :Q u it E C C P h ilip E S P (T E U L (M E U L E U L S P e r fo r m (B o o t th is P R O G R A M ) N o (R e -s e le c t m o d e l n a m e ) G o t (C h e c k th is m o d e l n a m e ) E N T E R :D e te r m in e E S C : Q u it Figure 4-2.
LQ-2080 Revision A 4.1.2 Bi-D Adjustment This adjustment is made after the main board or the CR motor has been replaced. The purpose of this adjustment is to electrically correct the head wire’s point of impact during Bi-D printing. The adjusted value is stored in the specific address in the EEPROM. Once the value is stored, it will not be erased if the printer is turned off or the EEPROM is reset.
LQ-2080 Revision A 6. When this adjustment is completed, if you need to perform another adjustment using this program, you can continue without turning off the printer. 4.1.3 TPE Level Reset Make this adjustment when the main board or Top PE Sensor has been replaced. Generally, light level emitted from the photo diode in a photo sensor lowers with age.
LQ-2080 Revision A 4.1.4 Writing the User-characteristic Data [To check the current status] Use this function to check the specific records of the printer used by your customer. Also, you can renew the starting date using this program. Since there is no standardized service operation using this function, you can use it whenever necessary. 3. Select “Characteristic Status Code” and press the Enter key. The following screen appears. 1. Perform the pre-operation. (See Section 4.1.1.
LQ-2080 Revision A S e ttin g S ta r tin g Y e a r /M o n th /D a y In p u t fo r m a t: 1 9 9 9 /1 /1 ---> 9 9 0 1 0 1 P le a s e in p u t 6 d ig its > > 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.
TROUBLESHOOTING
LQ-2080 Revision A 5.1 Overview 5.2.4 The Error codes with Indicators and Buzzer This chapter contains information necessary for troubleshooting. Like other chapters, this chapter does not include the information common to the LQ-2070. Table 5-1. Error Code Indicated by the LEDs 5.2 Troubleshooting Information This section gives you troubleshooting information to let you test points for replaceable units. 5.2.
LQ-2080 Revision A 5.3 Unit Level Troubleshooting The information for this section is the same as for the LQ-2070 except for the point below: Problem The printer does not operate at all. Point: Main board number C186 Main Board Table 5-2. Repairing the C272MAIN Board (1/3) → Cause Checkpoint Solution Reset IC2 is defective. Check the voltage waveforms of the VCC signal (CH1: IC2 pin 3) and VOUT signal (CH2: IC2 pin 1) when power is turned on. Replace IC2.
LQ-2080 Revision A Table 5-3. Repairing the C272MAIN Board (2/3) Problem Cause Checkpoint Solution Problem Cause Checkpoint Solution Paper feed is abnormal. IC3 is defective or IC12 is defective. • Check input signal waveform at pin 8 of IC12. • Check output signal waveform at pins 1, 2, 23, and 24 of IC12. If the input signal is not correct, replace IC1 or IC2 (or replace the main board). If the input signal is correct and the output signal is not correct, replace the IC11.
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) 39.3 ohms Troubleshooting → 29.
MAINTENANCE
LQ-2080 Revision A See the LQ-2070 Service Manual.
APPENDIX
LQ-2080 Revision A 7.1 EEPROM Address Map Table 7-2. EEPROM Address Map (2/7) NOTE: The data of two or more bytes are assigned in such way as lower byte to lower address, higher byte to higher address.
LQ-2080 Revision A Table 7-3. EEPROM Address Map (3/7) Address Data Data Format Q-pit data Factory setting 00H (Off) 00H (Off) 00H 00H 1DH Condensed 1EH (reserved) 1FH Print direction setting 0: Bi-d. 1: Uni-d. 2: Auto 00H (Bi-d.) 00H (Bi-d.) 20H I/F mode selection 0: Auto I/F selection 1: Parallel I/F 2: Type-B I/F 00H (Auto) 00H (Auto) 21H Auto I/F wait time setting 10:10 sec. 30:30 sec. 00:10 sec.
LQ-2080 Revision A Table 7-5. EEPROM Address Map (5/7) Q-pit data Factory setting Address b0: LOAD function b1: EJECT function b2: FONT selection b3: CONDENSED selection b4: TEAR OFF function b5: BIN selection b6: Draft self test b7: LQ self test 00H 00H 3CH Starting Year 3DH b0: LF function b1: FF function b2: Micro Adjust function b3: Pause function b4: Data dump b5: Default setting b6: Bi-d. adjustment b7: (reserved) 00H Manual insertion wait time 3 to 30 (by 0.1 sec.
LQ-2080 Revision A 7.2 Connector Summary Table 7-7.
LQ-2080 Revision A 7.3 Component Layout Figure 7-1.
LQ-2080 Revision A Figure 7-2.
LQ-2080 Revision A 7.4 Circuit Diagram See the following page for the circuit diagram for the C273 Main Board.
