EPSON TERM NAL PR NTER LX-300 SERVICE MANUAL ( ) EPSON 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. The precautiomry measures itemized below should always be observed when performin grepair/ maintenance procedures. DANGER 1. ALWAYS DISCONNECT THE PRODUCT FROM BOTH THE POWER SOURCE AND PERIPHERAL DEVICES PERFORMING ANY MAINTENANCE OR REPAIR PROCEDURE. BASIC SAFETY MEASURES AS DICTATED FOR ALL ELECTRONICS TECHNICIANS IN THEIR LINE OF WORK. 3. WHEN PERFORMING TESTING AS DICTATED WITHIN THIS MANUAL, DO NOT 2. NO WORK SHOULD BE PERFORMED ON THE UNIT BY PERSONS UNFAMILIAR WITH CONNECT THE UNIT TO A POWER SOURCE UNTIL INSTRUCTED TO DO SO. WHEN THE POWER SUPPLY CABLE MUST BE CONNECTED, USE EXTREME CAUTION IN WORKING ON POWER SUPPLY AND OTHER ELECTRONIC COMPONENTS. 1. REPAIRS ON EPSON PRODUCT SHOULD BE PERFORMED ONLY BY AN EPSON CERTIFIED REPAIR TECHNICIAN. AGE, 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. 2. MAKE CERTAIN THAT THE SOURCE VOLTAGE IS THE SAME AS THE RATED VOLT- 3. ALWAYS VERIFY THAT THE EPSON PRODUCT HAS BEEN DISCONNECTED FROM THE POWER SOURCE BEFORE REMOVING OR REPLACING PRINTED CIRCUIT BOARDS AND/OR INDIVIDUAL CHIPS. 4. IN ORDER TO PROTECT SENSITIVE MICROPROCESSORS AND CIRCUITRY, USE STATIC DISCHARGE EQUIPMENT, SUCH AS ANTI-STATIC WRIST STRAPS, WHEN ACCESSING INTERNAL COMPONENTS. 5. REPLACE MALFUNCTIONING COMPONENTS ONLY WITH THOSE COMPONENTS BY THE MANUFACTURE; INTRODUCTION OF SECOND-SOURCE ICS OR (YI'HER NONAPPROVED COMPONENTS MAY DAMAGE THE PRODUCT AND VOID ANY APPLICABLE EPSON WARRANTY. - ii - PREFACE This manual describes functions, theory of electrical and mechanical operations, maintenance, and repair of LX-300. The instructions and procedures included herein are intended for the experience repair technician, and attention should be given to the precautions on the preceding page. The chapters are organizd as follows: CHAPTER 1. PRODUCT DESCRIPTION Provides a general product overview, lists specifications, and illustrates the main components of the pMter. CHAPTER 2. OPERATING PRINCIPLES Describes the theory of printer operation. CHAPTER 3. DISASSEMBLY AND ASSEMBLY Includes a step-by-step guide for product d isassembly and assembly. CHAPTER 4. ADJUSTMENTS Includes a step-by-step guide for adjustment. CHAPTER 5. TROUBLESHOOTING Provides Epson-approved techniques for adjustment. CHAPTER 6. MAINTENANCE Describes preventive maintenance techniques and lists lubricants and adhesives required to service the equipment. APPENDIX Describes connector pin assignments, circuit diagrams, circuit board component layout and exploded diagram. The contents of this manual are subject to change without notice. -iv- ....... REVISION SHEET Revision Rev. A ( (j Issue Date April 6, 1994 Revision Page 1st issue 4 -v- TABLE OF CONTENTS CHAPTER 1. CHAPTER 2. CHAPTER 3. CHAPTER 4. CHAPTER 5. CHAPTER 6. APPENDIX PRODUCT DESCRIPTION OPERATING PRINCIPLES DISASSEMBLY AND ASSEMBLY ADJUSTMENTS TROUBLESHOOTING MAINTENANCE - vi - CHAPTER 1 Product Description Table of Contents 1.1 FEATURES 1-1 1-2 1.2 SPECIFICATIONS 1.2.1 Hardware Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 1.2.1.1 Paper Handling Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 1.2.1.2 Paper Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4 1.2.1.3 Printable Area.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5 1.2.1.4 Ribbon Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7 1.2.1.5 Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8 1.2.1.6 Environmental Conditions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8 1.2.1.7 Reliability. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8 1.2.1.8 SafetyApprovals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8 1.2.1.9 Physical Specifications . . . . . . . ...'..... . . . . . . . . . . . . . . . . . 1-8 1.2.2 Firmware Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9 1-11 1.3 INTERFACE SPECIFICATIONS 1.3.1 Parallel Interface Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11 1.3.2 Serial InterfaceSpecifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13 1-14 1.4 OPERATING INSTRUCTIONS 1.4.1 Control Panel Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14 1.4.2 Self-test Function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15 1.4.3 Hexadecimal Dump Function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15 1.4.4 PrinterStatus Indication. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15 1.4.5 Selected Font . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15 1.4.6 Paper Position Adjustments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15 1.4.7 Printer Initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16 1.4.7.1 Hardware Initialization. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16 1.4.7.2 Software Initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16 1.4.8 PrinterSettings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16 1.4.8.1 Selectable PrinterSettings . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16 1.4.8.2 Changing the DefaultSettings. . . . . . . . . . . . . . . . . . . . . . . . . . 1-17 1-21 1.5 MAIN COMPONENTS 1.5.1 Ct30 MAIN Board. , . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21 1.5,2 C130 PSB/PSE Board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21 List of Figures Figure Figure Figure Figure Figure Figure Figure Figure Figure Figure 1-1. Exterior View of the LX-300. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 1-2. Pin Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 1-3. PrintableArea forCut Sheets Using Manual Insertion. . . . . . . . . . . 1-5 1-4. Printable Area for Cut Sheets with the CSF. . . . . . . . . . . . . . . . . . . 1=6 1-5. PrintableArea forContinuous Paper . . . . . . . . . . . . . . . . . . . . . . . . 1-6 1-6. PrintableArea forRoll Paper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7 1-7. Data Transmission Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11 1-8. Panel Appearance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14 1-9. C130 MAIN Board Component Layout. . . . . . . . . . . . . . . . . . . . . . 1-21 1-10. C130 PSB/PSE Board Component Layout . . . . . . . . . . . . . . . . . 1-21 .P.::k f ('. List of Tables Table l-1. Optional Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 Table 1-2. Feeding Speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 Table l-3. Adjust LeverSettings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 Table 1-4. Specifications for Cut Sheet Paper (Manual Insertion) . . . . . . . . . . . 1-4 Table 1-5. Specifications for Cut Sheet Paper (CSF). . . . . . . . . . . . . . . . . . . . . 1-4 Table l-6. Envelope Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4 Table 1-7. Specifications for Continuous Paper (Single Sheet and Multi-Part) . 1-4 Table 1-8. Specifications for Continuous Paper with a Label. . . . . . . . . . . . . . . 1-5 Table l-9. Roil Paper Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5 Table l-10. Electrical Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8 Table 1-11, Environmental Conditions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8 Table 1-12. Character Tables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9 Table 1-13. Printing Speed.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10 Table 1-14, Resolution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10 Table 1-15 Signal and Connector Pin Assignments for the Parallel Interface. 1-12 Table 1-16. Signal and Connector Pin Assignments for the Serial Interface . . 1-13 Table 1-17 Font Selection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-15 Table 1-18 Font Lights and Language Selection. . . . . . . . . . . . . . . . . . . . . . . 1-17 Table 1-19 Default Options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-17 Table 1-20 Character Spacing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-18 Table 1-21 Shape of Zero. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-18 Table -22 Skip Over Perforation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-18 Table -23 Character Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-18 Table -24 Auto Line Feed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-19 Table -25 Page Length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-19 Table -26 Auto Tear Off. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-19 Table -27 Tractor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-19 Table 1-28. Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-19 Table 1-29. Bit Rate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-19 Table 1-30. Parity Bit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-20 Table 1-31. Data Length. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-20 Table 1-32. EWACK. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . l-2o (T `:""" LX-300 Service Manual 1.1 Product Daadption FEATURES The LX-300 is a small, light-weight, 9-pin serial impact dot-matrix color printer suitable for personal use. The major features of this printer areas follows: 0 Fast printing of 10-cpi draft characters at 220 cps Cl Compact design saves precious workspace Cl Easy-to-operate panel LI Quiet printing CI Standard 8-bit parallel interface and EIA-232D serial interface D Printing of up to 66 lines on A4-size or 62 lines on letter-size paper ~ Optional color printing usinga color ribbon (black, magenta, cyan, yellow) ~ Detachable push and pull tractor Figure 1-1 shows an exterior view of the LX-300 and Table 1-1 lists the optional units available for the LX-300. Edge guties ~ ~p"perwppof's A lease r YA& feed b Power .. ./, w Pfintercover #/< /'=5 A% A Print head Sprocket unit Paper Jpport Troctof - Figure 1-1. Exterior"View of the LX-300 Table 1-1. Optional Units I I I Model Description Ribbon cartridge (monochrome) Ribbon cartridge (monochrome, sub-mtridge) , I Ribbon cartridge (color) Single-bin cut sheet feeder Color upgrade kit [ I #8750 #8758 S015073 C80837* C83208* C80030* I Pulitractorunit I I Rev. A #8310 I Roil paper holder I 1-1 a Product Description LX-300 Sarvice Mimual 1.2 SPECIFICATIONS This section provides detailed information about the LX-300. /- . :.,, : ,.f 1.2.1 Hardware Specifications Printing method: Pin configuration: Pin diameter: Serial impact dot matrix 9 wires 0.29 mm Figure 1-2. Pin Configuration Printing direction: Bidirectional with logic seeking for draft text with monochrome printing. Unidirectional printing for graphics, NLQ text, bit image, and color printing. 1-2 Rev. A LX-XXI Sarvka Manual Product Description 1.2.1.1 Paper Handling Specifications Feeding system: Feeding method Cut sheets: Continuous paper: Feeding pitch: Paper paths Cut sheet path: Continuous paper paths: Continuous paper parking: CSF: Paper-feeding speed: Friction feed or tractor (push and pull) feed Manual insertion (top entry) and feeding with the optional cut sheet feeder (CSF) Push and pull tracto ...