Operation Manual

ManualsBrandsEpson ManualsPrinterLX300

(

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EPSON TERM

NAL PR NTER

LX-300

SERVICE MANUAL

EPSON

Summary of content (107 pages)

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EPSON TERM NAL PR NTER LX-300 SERVICE MANUAL ( ) EPSON
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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.
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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.
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....... ( REVISION SHEET Revision Issue Date Revision Page Rev.
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TABLE OF CONTENTS CHAPTER 1. CHAPTER 2. CHAPTER 3. CHAPTER 4. CHAPTER 5. CHAPTER 6.
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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.
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List of Figures Figure Figure Figure Figure Figure Figure Figure Figure Figure Figure .P.::k f (’. 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.
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Product Daadption LX-300 Service Manual 1.1 FEATURES The LX-300 is a small, light-weight, 9-pin serial impact dot-matrix color printer suitable for personal use.
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a LX-300 Sarvice Mimual Product Description 1.2 SPECIFICATIONS /- . :.,, : ,.f This section provides detailed information about the LX-300. 1.2.1 Hardware Specifications Printing method: Serial impact dot matrix Pin configuration: 9 wires Pin diameter: 0.29 mm Figure 1-2. Pin Configuration Printing direction: 1-2 Bidirectional with logic seeking for draft text with monochrome printing. Unidirectional printing for graphics, NLQ text, bit image, and color printing. Rev.
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Product Description LX-XXI Sarvka Manual 1.2.1.
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LX-WI Service Manual Product Description 1.2.1.2 Paper Specifications ,.. (i Table 1-4. Specifications for Cut Sheet Papar (Manual Insertion) Width 182 mm -257 mm (7.2 in. -10.1 in.) Length 182 mm -364 mm (7.2 in. -14.3 in.) Thickness 0.065 mm -0.14 mm (0.0025 in. -0.0055 in.) Weight 52.3-90 g/m2 (14 -24 lb.) Quality Plain paper, recycled paper ‘-’; Table 1-5. Specifications for Cut Sheet Paper (CSF) Size A4 (W x L: 210 mm (8.3 in.) x 297 mm (11.7 in.)) Letter (’W x L: 216 mm (8.5 in.
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Prvduct Description LX-300 Service Manual Table 1-8. Specifications for Continuous Paper with a Label Label size (W x L) 63.5 mm (min.) x 23.8 mm (min.) [ 2.5 in. (min.) x 15/16 in. (min.)] Width of base paper 101.6 mm -254 mm (4.0 in. x 10.0 in.) Thickness of base paper 0.07 mm - 0.09 mm (0.0028 in. - 0.0035 in.) Total thickness 0.16 mm - 0.19 mm (0.0063 in. -0.0075 in.) Weight 64g/m2(17 lb.) Quality Plain paper Notes: I Use only continuous-type labels and use them only with the tractor.
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LK300 Service Manual Product Description Cut Sheets Using the (XF 3 mm 10.12”1. mm,mum A L XY BC Figure 1-4. Printable Area for Cut Sheets Using the CSF Continuous paper 101.6 t-m-n - 2S4 nun [4” - 10~, masinwm 0 0 o I 1:0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 42 0 0 0 0 0 0 0 o 0 0 0 0 0 0 0 0 0 0 0 0 a o 0 0 0 1 PfintaM9 Area f“’. - .;. 0 0 0 0 0 0 0 0 0 a o 0 0 0 a o a a a a a a —a “ 13 mm (0.51”) or more whm ppar wid?h of 101.6 MM (4-) to 241.3 mm (9.
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Prvduct Description LX4tW Service Manual Roll paper 213 mm -219 mm [8.38’ - 8.62’] 3 mm [0.12” minimum w I > * 203.2 mm [8’J maximum Printable Area ) I m ‘ 9.8 mm (0.39”) or more when a paper widthof216 f 3 mm is used. Figure 1-6. Printable Area for Roll Paper 1.2.1.
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LX-300 Service Manual Product Description 1.2.1.5 Electrical Specifications Table 1-10. Electrical Specifications 120 V Version 220-240 V Version 120 VAC 220-240 VAC 103.5-132 VAC 198-264 VAC Description Rated voltage Input voltage range r Rated frequency range 50-60 Hz Input frequency range 49.5 -60.5 Hz 0.5 A 1.0 A Rated current 30 W (self-test in 10 cpi draft) Power mnsumption Insulation resistance 10 MQ, minimum (applying 500 VDC between AC hne and chassis) 1.
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Ptvduct Lkacription LX-3(M Service Manual 1.2.2 Firmware Specifications Control codes: EsC/r Input data buffer: 4KB Character sets: 13 international character sets Character tables: See the table below. Table 1-12.
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LX-W) Service Mhnual Product Description Table 1-13. Printing Speed Printing Mode Notes: Ch~m&:er ( Maximum Print Speed [cps] Printable Columns Monochrome Color Draft 10 cpi 80 220 (165) 165 (1 65) Draft 12 cpi 96 264 (198) 198 (198) Draft condensed 17.1 cpi 137 188 (141) Draft condensed 20 cpi 160 220 (165) Draft emphasized 10 cpi 80 110 (83) Draft double width 5 cpi 40 110 (83) NLQ 10 cpi 80 44 (33) NLQ 12 cpi 96 53 (40) NLQ double width 5 cpi 40 22 (16) .
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Prvduct Description LX-3(3O Service Manual 1.3 INTERFACE SPECIFICATIONS has parallel interface and serial interface, one of which can be selected in default setting mode. Auto selection is also available. LX-300 1.3.1 Parallel Interface Specifications The LX-300 is equipped with an 8-bit parallel interface, standard.
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I ~s and signal functions for the 8-bit parallel interface. -1 . . . Pin Assignments for Parallel Interface . —. [ }.. . I Description I ~ The STROBE pulse is used to read the input data. The pulse width must be more than 0.5 p.s. Input data is latched after the falling edge of this signal. I Parallel input data to the printer. A HIGH level means data 1. A LOW level means data O. This pulse indicates data has been received and the printer is ready to accept more data.
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Product Description LX-3(IO Service Manual 1.3.2 Serial Interface Specifkations The LX-300 is equipped with an 8-bit serial interface, standard.
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UiWtJ Service Mhnual Product Description 1.4 OPERATING INSTRUCTIONS This section describes control panel operation ~ctions, demonstration functions, and printer initialization methods. self-test, hexadecimal dump, .“ “II ~n ~~ 1.4.1 Control Panel Operation The printer control panel contains three non-lock-type push buttons and three LED indimtors for easy operation of the various printer functions. Buttons Lights Light A / / Roman O O Font Saris SerifO ● Draft. Draft o Condensed.
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Pfvduct LMacription LX#O Service Manual 1.4.3 Hexadecimal Dump Function The hexadecimal dump is a useful tool for troubleshooting data control problems. This section describes how to run a hex dump. 1. Turn on the printer while holding down the LF/FF and FONT buttons. 2. If paper is not loaded, the printer attempts it (either single sheet or continuous paper). 3. If the printer cannot load the paper, it indi~tes a paper-out error. In this case, insert paper again, and press the PAUSE button. 4.
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LXiWO Service Manual Product Description 1.4.7 Printer Initialization There are two types of initialization: hardware initialization and software initialization. 1.4.7.1 Hardware Initialization Hardware initialization is performed by: . Turning on the printer. . Sendiny@e parallel interface the~signal. (If the INIT signal is active when the printer is turned on, hardware initialization is started when the ~ signal becomes imctive.) When hardware initialization is performed: .
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Product Description LX-300 Service Manual 1.4.8.2 Changing the Default Settings You can change some parameters that the printer refers to at printer initialization. 1. To enter the default setting mode, turn on the printer while holding down the FONT button. The printer prints out the firmware version. If paper is not loaded, insert a sheet of paper. 2. The printer automatically loads the paper and prints a table of languages to choose from: English, French, German, Italian, and Spanish.
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LX300 Service M%ual Product Description Table 1-20. Character Spacing Character Spacing FONT Light 2 PAUSE Light FONT Light 1 OFF OFF OFF 10 cpi ON ON ON 12 cpi A Table 1-21. Shape of Zero FONT Light 1 FONT Light 2 PAUSE Light Space of Zero OFF OFF OFF o ON ON ON 0 Table 1-22. Skip Over Perforation FONT Light 1 FONT Light 2 PAUSE Light SkipOver-Petioration OFF OFF OFF No Skip ON ON ON skip Table 1-23.
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Product Lkactiption LX-3(IO Service Manual Table 1-24. Auto Line Feed Auto Line Feed FONT Light 1 FONT Light 2 PAUSE Light OFF OFF OFF off ON ON ON On Table 1-25. Page Length Page Length FONT Light 2 PAUSE Light FONT Light 1 ON OFF OFF 11 inches OFF ON OFF 12 inches ON ON OFF 8.5 inches OFF OFF ON 70/6 inches Table 1-26. Auto Tear Off FONT Light 1 FONT Light 2 PAUSE Light Auto Tear Off OFF OFF OFF off ON ON ON On Table 1-27.
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U-300 Service Manual Product Description Table 1-30. Parity Bit FONT Light 1 FONT Light 2 PAUSE Light Parity Bit ON OFF OFF None ON ON OFF ON ON OFF ((’’” Even Table 1-31. Data Length , FONT Light 1 FONT Light 2 PAUSE Light Data Length OFF OFF OFF 7 bits ON ON ON 8 bits Table 1-32. ETX/ACK FONT Light 1 FONT Light 2 PAUSE Light ETX/ACK OFF OFF OFF off ON ON ON On ~ .,...., ,. ..,,-,. 1-20 Rev. A ,.
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Ptvduct Daactiption LX-3(IO Sarvice Manual 1.5 MAIN COMPONENTS The main components of the LX-300 is designed for easy removal and repair. The main components are; ■ C130 MAIN BOARD: Control board ■ C130 PSB/PSE (120V / 220-240V) BOARD: Power supply board ■ M-3G1O: Printer mechanism 9 Housing 1.5.1 C130 MAIN Board The C130 MAINboard consists of an E01A09 (CPU), a Program/CG ROM, a RAM, an EEPROM, etc.
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( CHAPTER 2 Operating Principles Table of Contents 2-1 2.1 PRINTER MECHANISM OPERATION 2.1.1 Printing Mechanism. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 2.1.2 Carriage Movement Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2 2.1.3 Paper Handling Mechanism. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3 2.1.3.1 Paper Feed Mechanisms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3 2.1.3.
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List of Figures Figure 2-1. iSrintheadoperation principles . . . . . . . . . . . . . . . . . . . . . . . . . . . . z-l Figure 2-2. [:arriage Movement Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2 Figure 2-3. IFriction Advance Mechanism. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3 Figure 2-4. I~ush Tractor paper Advance Mechanism . . . . . . . . . . . . . . . . . . . . 2-4 Figure 2-5. Ipu~Tractor paper Advance Mechanism . . . . . . . . . . . . . . . . . . . . .
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Operating Ptinciph3 LX-3(XI Service Manual 2.1 PRINTER MECHANISM OPERATION l%is section describes the M-3G1O printer mechanism and explains how it works. 2.1.1 Printing Mechanism The printer mechanism is composed of the printhead, ink ribbon, and ribbon mask. The printhead is a 9-pin head for impact dot printing. Each wire has own drive coil, which causes the wire to move in and out of the printhead to print each dot. The four steps below describe how these driving wires work. 1.
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LX-WI Service Mimual Operating Principles 2.1.2 Carriage Movement Mechanism The carriage movement mechanism consists of the carriage assembly, CR motor assembly, timing belt, driven pulley, HP sensor, etc. The CR motor assembly drives tie tifig belt. me carriage assembly is comected to the timing belt, which is moved by the CR motor assembly. Figure 2-2 shows the carriage movement mechanism. The printer detects the carriage home position with the HP sensor.
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Operating Principla LX-300 Sewica Manual 2.1.3 Paper Handling Mechanism During normal operation, the paper is fed to the printer, advanced to the specified position, and ejected from the printer. These paper handling operations are performed by various paper handling mechanisms, such as the tractors, rollers, and gears. This section describes the paper handling mechanism for this printer. 2.1.3.1 Paper Feed Mechanisms Cut sheets are fed by friction. Continuous paper is fed by a tractor.
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LX-300 Service Manual Operating Principles Table 2-2. PF Motor Assembly Specifications Requirement Categov Type 4-phase, 48-pole, PM-type stepping motor Drive Voltage 31.5 -38.
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Operating Ptincipla LX-300 Sarvica Manual Pull Tractor Method The pull tractor advances paper in basically the same way as the push tractor. When the push tractor is installed at the paper exit instead of paper entrance, the tractor functions as a pull tractor instead of a push tractor, pulling the paper out of the printer mechanism. Figure 2-5 shows the pull tractor advance mechanism. Continuous Paper , -. R PL .,PF Figure 2-5. Pull Tractor Paper Advance Mechanism Rev.
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U400 Smdce Manual Operatjng Prjncjples Push - Pull Tractor Method The push-pull tractor method is a combination of the push method, using the standard tractor, and , ~’ “ the pull method, using an optional tractor. The two traders operate simultaneously to push and pull the paper through the printer mechanism. Figure 2-6 shows push-pull tiadoroperation when the paper is fed through the rear paper entrance. ~.i , .. Figure 2-6.
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Operating Principb LX~lW Service Manual 2.1.4 Ribbon Advance Mechanism The ribbon is held between the ribbon advance roller (ribbon driven gear) and the ribbon pressure roller. When the carriage moves on the CR guide shaft from left to right and vice versa, the timing belt turns the belt driven pulley. Then the torque is transmitted to the ribbon driving gear through the gear trains.
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LX-300 Service Manual Operating Principles 2.1.5 Ribbon Shift Mechanism This printer can be equipped with a color upgrade kit to print in color. The printer performs color printing unidirectionally. The option is composed of the color ribbon shift mechanism. The Color ribbon feed mechanism is shared in common with black ribbon feed mechanism, and the shift mechanism shifts the ribbon cartridge up and down. Table 2-2 shows the CS motor assembly specifications.
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Operating Pdncipb LX-300 Service Manual Color Ribbon Cartridge Fulcrum 1/ LEVER,CS - -—- HOLDER, CARTRIDGE,COLOR Pinion of MOTOR ASSY.,CS Color Shift Cam Color Shift Cam Follower Figure 2-9. Color Shift Mechanism 2.1.6 Platen Gap Adjustment Mechanism ‘The platen gap (the gap between the platen and the printhead) can be adjusted to allow the printer to use paper of different weights or thicknesses. When the gap adjust lever is moved forward or backward, the CR guide shaft rotates.
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LXXX) Service Mimual Operating Principles 2.2 POWER SUPPLY OPERATION powered by either of two power supply boards: the C130 F’SB (120V) board assembly or the C130 PSE (230V) power supply. The function of these two boards is the same, except for a difference in primary circuitry. The power supply board outputs the DC current necessary to drive the printer control circuits and drive mechanism. Table 2-6 shows the input voltages and fuse ratings for these boards. The printer can be ( ( “+ Table 2-6.
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Operating Principk LX300 Sarvica Manual 2.2.2 Power Supply Circuit Operation Figure 2-11 shows a block diagram of the power supply circuitry. When AC power is supplied to the printer from an external power source, a filter circuit removes the noise. l%e AC voltage then undergoes full-wave rectification and is smoothed to produce the direct current supply voltage. This voltage is fed through a switching circuit and secondary smoothing circuit to produce the stepped down +35 VDC supply.
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LX-300 Service Manual Operating Principles 2.3 CONTROL CIRCUIT The control circuit consists of the C130 MAIN board assembly. This -on describes the major components and explains how the board works. ( :“ 2.3.1 Control Circuit Operation Overview The printer’s system IC contains a CPU (pPD78C10A-type) that mm at 14.74 MHz, a gate array (E05A79-type) and a main RAM ( 8KB SRAM). It oversees control of all the components in the printer.
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Oparating Principk LX-300 Sarvice Manual 2.3.2 Power On Reset Circuit When the power supply is turned on, the VL goes up to +9 VDC immediately, but reset IC output (IC A2,-.Pin 6) is delayed for approximately 80- 1 ma before going up to +9 VDC. The system IC receives this Lowlevel signal ‘~om the res& IC and resets itself. VL +5V ? t 3ESFT R37 * \:2) SYSTEM IC IC (ICI) v(-.~ ~ R38 4 4 GND OUT 6 & ‘ 3 RESET T C24 Figure 2-13. Power On Reset Circuit Diagram 2.3.
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LX-300 Service Mhnual Operating Principles 2.3.4 Paper End Sensor Circuit This printer has a comector switch for sensing the paper end. me system IC receives a signal (HIGH or LOW) from the connector switch and recognizs a paper end. The comector switch is closed (LOW) when there is no paper on the platen and is open (HIGH) when paper is present. +5V t SYSTEM IC (ICI) R74 PE Sensor + PB2 4 R72 J’ Figure 2-15. Paper End Sensor Circuit Diagram 2.3.
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LX-300 Sarvica Manual Operating Pdnoipk 2.3.6 Carriage Motor Driver Circuit Figure 2-17 shows the carriage motor driver arcuit. The carriage motor driver uses an open-loop, constant-current drive arrangement. The motor is driven with 2-2 phase excitation and 1-2 phase excitation. The ~rriage motor driver IC (Al) detects the amount of current in the carriage motor coils and regulates the current. The amount of current flowing in the coils varies, depending on the speed of the carriage motor.
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LX-3(M Service Manual Operating Principles 2.3.7 Paper Feed Motor Driver Circuit Figure 2-18 shows the paper feed motor driver circuit, an open-100P, constant-voltage drive with 1-2 phase excitation. ( {“ ‘: The ports (pins 137- 140) on the system IC (ICI) are used to control the stepping motor. The pulse signal from the IC1 controls four transistors and the stepping motor.
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Opamting Principk LX-300 Sanka Manual 2.3.9 Interface Circuit Figure 2-20 shows the parallel interface circuit block diagram. Data from the host mmputer is latched within the system IC by a WOOSTROBE signal. The system IC outputs a BUSY signal automatically to stop the host computer from sending further data. The CPU block reads the data latched in the gate array block periodically without generating an interrupt. STSTEM IC PARALLEL l/F ICI y / / / / y / / / / / / / / / ‘ND7-0 “w. 5’ STROBE ......
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LX#Xl Service Manual Operating Principles 2.3.10 EEPROM Control Circuit Figure 2-22 shows the EEPROM control arcuit block diagram. ‘The EEPROM (A5) contains such information as the top-of-form position. The EEPROM is non-volatile memory, so information is not lost if the printer is powered off. Since the EEPROM is a serial I/O-type device, the CPU (:“-% converts 8-bit data into serial data. +5V 4 SYSTEM IC (ICI) PB7 PB5 PBO PB1 -+-h 9 7 2 3 ICT1 EEPROM (A5) 1 Cs CK 3 DI 4 Do 2 J Figure 2-22.
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operating Ptincipk3 LX-300 Sarvica Manual 2.3.12 Color Ribbon Sensor Circuit The printer’s color ribbon arcuitry in shown in the figure below. The CPU receives signals (HIGH or LOW) from the mechanical switch. lle signal is HIGH when a color ribbon is installed and is LOW otherwise. +5V Sensor AN4 ~ A i i i L i I Printer I Color Upgrade Kit Figure 2-24. Color Ribbon Sensor Circuit Diagram Rev.
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( CHAPTER 3 Disassembly and Assembly Table of Contents 3.1 OVERVIEW 3.1.1 Disassembly Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.1.2 TOOk3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ........0-. 3.1.3 Service ChecksAfterRepair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.1.4 Specifications forScrews. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 3-1 3-1 3-2 3-3 3-4 3.
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List of Figures Figure 3-1. Procedure for Disassembling the Printer. . . . . . . . . . . . . . . . . . . . . 3-4 Figure 3-2. Removing the Printhead. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5 Figure 3-3. Removing the HOUSING ASSY.,UPPER . . . . . . . . . . . . . . . . . . . . 3-6 Figure 3-4. Removing the ROLLER ASSY.,EJECT. . . . . . . . . . . . . . . . . . . . . . 3-6 Figure 3-5. Removing the SHIELD PLATE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7 Figure 3-6.
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Disasaambly and Asaambly L.XWO Service Manual 3.1 OVERVIEW This section describes various points to note when disassembkg and assembling the printer. 3.1.1 Disassembly Precautions Follow the precautions below when disassembling the printer. I Before disassemblin~ assemblin~ or adjusting the printer, disconnect the power supply cablefiom the AC power socket. Failure to do can cause personal injuy. I To maintain efficient printer operation: ● Use only the recommended tools for maintenance work.
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LXXX) Service Jl&mual Disassembly and Assembly 3.1.3 Service Checks After Repair Before returning the printer after service, make servicing and shipping more effiaent. use the checklist in Table 3-3, Whib provides a record to Table 3-3.
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Disassembly and Assembly LX-300 Service Manual 3.1.4 Specifications for Screws Table 3-4 lists the abbreviations used in the following sections for small parts, such as screws and washers. Table 3-4.
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LX-300 Service Manual Disassembly and Assembly 3.2 DISASSEMBLY AND ASSEMBLY This section descnibes the procedures for disassembling and assembling the main components of the printer. When the procedure for installing a component is Simply tie reverse of the procedure for removing the component, no description of the installation is given. Arty points of special concern follow the description of the procedure. ● ‘ ● Before disassembling any part of the printer, note the warnings in Section 3.1.
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Disassamb& and Assembly LX-3W Sanka Manual 3.2.1 Removing the Printhead Remove the COVER ASSY.,PRINTER, EDGE GUIDE ASSY., ribbon cartridge, TRACTOR ASSY., PLATEN KNOB, and optional color upgrade kit. 2. Remove the CPB (M3 x 14) screw attaching the printhead. 3. Remove the printhead. 4. Remove the flexible flat cable (lWC) from the printhead. 1. Figure 3-2. Removing the Printhead Rev.
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LX-300 Service Manual Disassembly and Assembly 3.2.2 Removing the HOUSING ASSY.,UPPER 1. Remove the COVER ASSY.,pM~R, EDGE GUIDE AssY., ribbon c=tidge, TRACI’OR ASSY., PLATEN KNOB, and optional color upgrade kit. 2. Remove the 4 CPB (M4 x 14) screws attaching the HOUSING ASSY.,UPPER to the HOUSING,LOWER. 3. Liftoff the HOUSING ASSY.,UPPER. CPB(M4X14) ~’~ HOUSING ASSY ., UPPER ING,LOWER Figure 3-3. Removing the HOUSING ASSY.,UPPER 3.2.2.1 Removing the ROLLER ASSY.,EJECT 1. Remove the HOUSING ASSY.
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DisassembiyandAssembly LX-31M Service Manual 3.2.3 Removing the BOARD ASSY.,MAIN and PSB/PSE 1. Remove the COVER ASSY.,PRINTER, EDGE GUIDE ASSY., ribbon cartridge, TIUU30R ASSY., PLATEN KNOB, and optional color upgrade kit. 2. Remove the HOUSING ASSY.,UPPER (see Section 3.2.2). 3. Discomect the 3 flexible flat cables (FFCS) and 6 connectors from the BOARD ASSY.,MAIN and PSB/PSE. 4.
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LX&Xl Service M%ual Disassembly and Assembly 3.2.3.1 Removing the BOARD ASSY.,MAIN Remove the FFC of the BOARD ASSY.,PSB/I’SE from comector CN2 of the BOARD ASSY.,MAIN. 2. Remove the CBC (M3 x8) screw and the3 CB USCAC (M3 x 8) 3. Remove the BOARD ASSY.,MAIN. 1. fl::y %. . . 3.2.3.2 Removing the BOARD ASSY.,PSBIPSE Remove the FFC for the BOARD ASSY.,PSB/I’SE from comector CN2 on the BOARD ASSY.,MAIN. 2. Remove the CB USCA C(M3 x 10) screw and 2 CB USCA C(M3 x 8) ssrews. 3. Remove the BOARD ASSY.
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DisassembiyandAssamblY LX- Service Manual 3.2.4 Removing the Printer Mechanism 1. Remove the COVER ASSY.,PRINTER, EDGE GUIDE ASSY., ribbon cartridge, TRACT’OR AS5Y., PLATEN KNOB, and optioml color upgrade kit. 2. Remove the HOUSING ASSY.,UPPER (see Section 3.2.2). 3. Remove the connectors and FFCS from the BOARD ASSY.,MAIN. 4. Remove the3 SHAFT,HOUSING,LOWER (1018296). 5. Remove the SHAFT,HOUSING,LOWER (1015457). Note that this shaft is different from the three described in the previous step.
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LX-3.X) Service Manual Disassembly and Assembly 3.2.4.1 Removing the MOTOR ASSY.,PF 1. Remove the printer mechanism (see Section 3.2.4). 2. Remove the GROUNDING SPRING,PLATEN that secures the platen shaft. (see Section 3.2.43) 3. Remove the CBB (M3 x 8) screw attaching the MOTOR ASSY.,PF to the FRAME,LIGHT. 4. Release the clip holding the MOTOR ASSY.,PF from the FRAME,RIGHT. 5. Remove the MOTOR ASSY.,PF from the FRAME,RIGHT. . ‘.:- FRAME, RIGHT TR~NSMISSloN GEAR \uJy~ / P CBB(M3X8) & MOTOR, ASSY.
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Disasaambly and Assambly LX-31M Service Manual 3.2.4.2 Removing the MOTOR ASSY.,CR (~, 1. Remove the Printer Mechanism (see Section 3.2.4). 2. Remove the BELT TENSION SPRING from the hook on the MOTOR ASSY.,CR and the hook on the FRAME, BASE. 3. Remove the TIMING BELT from the PULLEY DRIVE. 4. Remove the E-ring, PULLEY WASHER, BELT PULLEY FLANGE, and PULLEY DRIVE from the MOTOR ASSY.,CR. 5. Rotate the MOTOR ASSY.,CR counterclockwise and remove it. TIMIN~ BELT I i .
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LX-WI Service Manual Disassembly and Assembly 3.2.4.3 Removing the PUiTEN .fl \ i-x :, 1. Remove the printer mechanism (see Section 3.2.4). 2. Remove the GROUNDING SPRING,PLATEN that secures the platen shaft. 3. Remove the GEAR,25 from the FRAME,RIGHT. 4. Disengage the teeth of the 2 BUSHING 11s and rotate them. 5. Rotate the PLATEN and remove it. w, BuSHING,l 1 . . PLATEN \, \, \ ~ “x ..... GROUNDING SPRING, Figure 3-11. Removing the PWTEN 3-12 Rev.
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Disassembly and Assambly LX-300 Service Manual 3.2.4.4 Removing the DETECTOR,PE 1. Remove the printer mechanism (see Section 3.2.4). 2. Remove the PLATEN (see Section 3.2.4.3). 3. Release the SHAFT FRICTION of the PAPER GUIDE,UPPER from the clips on the FRAME,RIGHT and LEFT. 4. Remove the PAPER GUIDE,UPPER from the FRAME,RIGHT and LEIT. c s ON GHT Figure 3-12. Removing the DETECTOR,PE 5. Release the 2 clips securing the DETECTOR,PE and remove it.
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LX-3(IQ Service Manual Disassembly and Assembly 3.2.4.5 Removing the DETECTOR,HP 1. Remove the printer mechanism (see Section 3.2.4). 2. Release the 2 clips attaching the DETECTOR,HI’ and remove it. The clips can be accessed through 2 holes in the FRAME,BASE; to release the clips, push each with a pair of tweezers. Figure 3-14. Removing the DETECTOR,HP 3.2.4.6 Removing the Release Lever Position Sensor 1. Remove the MOTOR ASSY.lF(See Wion3.2.4.1). 2.
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Disassembly and Assembly LX300 Service Manual 3.2.4.7 Removing the CARRIAGE ASSY. Remove the printer mechanism (see Section 3.2.4). Remove the BELT TENSION SPRING from the hook on the MOTOR ASSY.,CR (see Section 3.2.4.2), and remove the TIMING BELT of the CARRIAGE ASSY. from the PULLEY DRIVE. 3. Release the hook that attaches the SHEET,CABLE,HEAD to the FRAME,BASE. Slide the cable to the left and remove it. 4. Remove the printhead FFC from the FRAME,BASE. 5.
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Disassembly and Assembly LX-3tM Service Mhnual 3.2.4.8 Removing the Ribbon Drive Gear Assembly 1. Remove the printer mechanism (see Section 3.2.4). 2. Release the3 hooks attaching the COVER,RD to the FRAME,LEFI’. 3. Remove the COVER,RD. 4. Remove the BELT TENSION SPRING between the hook on tie MOTOR ASSY.,CR and the hook on the FRAME,BASE (see Section 3.2.4.2). 5. Remove the TIMING BELT from the PLJLLEY DRIVEN. A!.,+, ,, i ,. RATCHET,RD cov&&~g;,:,H,,ANGE $- R18BON P~N=AR’f GEAR SHAH G E A R ,5.
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LX-300 Samica Manual DiaassemblyandAssembly 3.2.5 Removing the BOARD ASSY.,INTERFACE 1. Remove the printer mechanism (see Section 3.2.4). 2. Remove the GROUNDING PLATE connecting the SHIELD PLATE,I NIERFACE and the SHIELD PLATE. 3. Remove the CBB (M3 x8) screw and the CBT(M3 x 10) screw attaching the COVER,BO’IIOM to the HOUSING,LOWER. 4. Remove the 2 CBB (h43 x 8) screws attaching the BOARD ASSY.,1 NTERFACE to the HOUSING,LOWER. 5. Remove the COVER,BOTTOMand the BOARD ASSY.,INTERFACE. BOARD ASSY.
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LXi300 Service M5nual Disassembly and Assembly 3.2.6 Removing the ROLLER ASSY.,DRIVEN 1. Remove the COVER,PRINTER. 2. Remove the CF (M2.6 x 8) screw attaching the ROLLER ASSY.,DRTVEN. 3. Remove the ROLLER ASSY.,DRIVEN. CF(M2.6X8) ROLLER, DRIVEN I SPRING,73 .h 7° / A / & 0 “’ i,’ !’ “T.e W~DE;R,ROLLER, COVER, ROLLER, DRIVEN COVER, PRINTER \v Figure 3-19. Removing the ROLLER ASSY.,DRIVEN 3-18 Rev.
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Dkassembly and Assembly LX-WI Service Manual 3.2.7 Disassembling and Assembling the Optional Color Upgrade Kit 3.2.7.1 Removing the MOTOR ASSY.,CS 1. Remove the CBB (M3 x 8) screw attaching the MO~R ASSY.,CS to the COVER,CS. 2. Release the 2 clips attached to the COVER,CS. 3. Remove the MOTOR ASSY.,CSwith the BOARD ASSY.,CS from the COVER,CS. 3.2.7.2 Remove the GEAR,CAM,CS 1. Remove the MOTOR ASSY.,CS (see Section 3.2.7.1). 2. Remove the E-ring3 from thecolorcam shaft. 3. Remove the GEAR,CAM,CS. 3.2.7.
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CHAPTER 4 Adjustments Table of Contents 4-1 4.1 ADJUSTING THE PRINTER MECHANISM 4.1.1 Platen Gap Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 4.2 DEFAULTS, MACHINE INFORMATION S~lNGS, AND 4-2 BIDIRECTIONAL ADJUSTMENT 4.2.1 Default Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2 4.2.2 Bidirectional Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Adjuatmenta LX-3U0 Service Manual 4.1 ADJUSTING THE PRINTER MECHANISM This section describes the adjustments you may need to make to the printer mechanism. 4.1.1 Platen Gap Adjustment If you have rotated or reassembled the CR guide shaft assembly or the parallelism adjustment bushina or if printing is abnormal, you must adjust the platen and the printhead. 1. 2. 3. 4. 5. 6. 7. Set the release lever to the friction position. Remove the upper housing assembly (see Section 3.2.1).
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LX-300 Service Mimuai Adjustments 4.2 DEFAULTS, MACHINE INFORMATION SEITINGS, AND BIDIRECTIONAL ADJUSTMENT 4.2.1 Defaults and Machine Information Settings Perform the 1. 2. 3. 4. 5. 6. 7. procedure below when the main board assembly is replaced. Comect the printer to a PC. Turn the printer on. Load paper into the printer by pressing the LF/FF button. You can use either cutsheet or continuous paper. Load the GWBASIC program onto the PC.
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Adjustments LX41M Sarvka Manual 11. Press Y, then Enter. The default setting table appears on the display: Add Function No.
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LX&M Service Mhnua/ Adjustments 4.2.2 Bidirectional Adjustment This section describes the adjustment prmedure n=ssary when the LX-3W printer is reassembled or when parts are reinstalled or replaced. T’his pr~ure is also n=es=q if the main board assembly has been replaced. Notes: . When the main board is replaced, perform the Defaults& Machine Information Settings procedure first, then petiorm the Bi-D Adjustment prucedure. ● Theprintercovermustbe installed when youperfonn the Bi-Dadjustment. .
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LX&M Service Manual 8. 9. Adjustments Type 1 to select Bi-D Adjustment then press Enter. After 10 line feeds, the printer prints 5 rows of H characters in both draft and LQ modes. When the printer begins bidirectional printin& the message “Bi-D TEST PRINTING” appears on the display.
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Chapter 5 Troubleshooting Table of Contents 5.1 OVERVIEW 5-1 5.2 UNIT LEVEL TROUBLESHOOTING 5-4 5.3 REPAIRING THE MAIN BOARD ASSEMBLY 5-11 5.4 REPAIRING THE PRINTER MECHANISM 5-13 List of Figures Figure 5-1. Troubleshooting Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1 Figure 5-2. Printhead Connector Pin Alignment . . . . . . . . . . . . . . . . . . . . . . . . 5-2 Figure 5-3. Flowchart Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Tmubkahooting LX+Otl Service Manual 5.1 OVERVIEW Follow the procedure in the flowchart below to identify printer problems. ( The Fault is corrected ) Figure 5-1. Troubleshooting Note: If the power supply board assembly is fautty, it must be replaced as a whole unit. No field repair should be performed on it, except for the replacement of fuse F1. The following tables provide troubleshooting information. Table 5-1. Printhead Coii Resistance Rev.
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LX-300 Service Manual Troubleshooting Printhead Head l!’-.. H ..,,, Pin No. 6 8 4 9 2 C C C351 7 C : COMMON View A Figure 5-2. Printhead Connector Pin Alignment Table 5-2. Printhead Driver Test Points Transistor Numbers Test Method (Set Meter to Diodes. Check with Power Off.) I Q1 ,Q2,Q3,Q4 Check from base to collector. Q5,Q6,Q7,Q8, Check from base to emitter. I Reverse leads and test again. I Q9 Meter Reading Not open and not shorted from base to collector, base I to emitter.
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Ttvubleshooting LX-300 Service Manual Table 5-4. Motor Coil Resistance Test Points Common Motor Pin >onnector Number Number Test Pin Number Test Method (Set Meter to Ohms. Disconnect Motor from Main Board and Check it with Printer Power Off.) CR Motor Assembly (CN2) 3,4 1,2,5,6 Place one lead on pin 3 or 4 and the other lead on each of the 4 test pins to check the two motor phases.
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LX-300 Swvfce Manual Troubleshooting 5.2 UNIT LEVEL TROUBLESHOOTING Y OU may be able to identify the defective unit just from the symptom displayed. The table below provides the symptoms for a number of failures, so that YOU ~ easily identify the problem. Once the m-oblem has been identified, refer to the flowchart listed in the right-hand cAmn of the table bel;w to determine the cause of the problem. , -~--:, E ;,’ Table 5-7. Symptoms and Problems Printer fails to operate when the power is on.
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Tfvubleshooting LX-300 Service Manual 1. Printer fails to operate when the power is on. Use correct AC input voltage. 120V version is 103.5 -132V 230V version is 198- 284V TYES No fluctuation from AC voltage range is permitted. \ i / PSWPSE blow? NO Measure the VP(+35VDC) at pin 1 and 2 of CN2 on BOARD ASSY.,PSWPSE. Replace the BOARD ASSY.,MAIN. Verify each motot’s coil resistance in Table 54. Replace necessary unit. Replace the BOARD ASSY.,MAIN. END * Rev.
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LX-WI Service Mhnual Troubleshooting 2. Abnormal carriage operation. CEp Are connectors CN2 - CN8 connecting the BOARD ASSY, MAIN and the Prinler Mechanism? Reinsert connectors ~ correclly. YES NO 4 ND * ➤ See the troubleshooting item for the PRINTER MECHANISM .( Section5.4) NO ault corrected? ND v 5-6 Rev.
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Tmubleshootina LX-3(M Service Manual 3. Printing is faulty during self-test, but carriage operation is normal. Uss correctAC input voltage. No fluotuatkn from AC voftage range is permitted. AC input voltage normal? 120V version is 103.5 -132V 230V version is 198- 264V I Hold down the LF/FF button and turn on the printer to start printing the self-test. I ra the oonnactors CN2ASSY., MAIN and the Printer Reinaertfhem -.
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LXMO Service Manual Troubleshooting 4. Abnormal paper feed. START Load the pape correctly. ‘T ➤ YES Reinsert the connector CN6 correctly. NO fault corrected? 4 . $. . . . . See the troubleshooting items for the PRINTER Replace the BOARD ASSY.,MAIN. MEcHANlsM.(sect.5.4) NO YES YES v See the troubleshooting items for the Printer Mechanism. (Sect.5.4) Replace the BOARD ASSY.,MAIN. + /7 N ;: S-8 Rev.A .
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Tmublaatmoting LX-300 Service Manual 5. Abnormal control panel operation. w NO v , NO 4 Replace the switches on the BOARD ASSY.,MAIN. fault corrected? I YES - Replace the BOARD ASSY.,MAIN. A NO YES Refer to the other troubleshooting items.
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LX-300 Service Manual Troubleshooting 6. Data sent by the host compute?’ is printed incorrectly. Y START F Print the self-test. Refer to the other troubleshooting items. I Check the default setting. ... 4 ‘..... Replace the interface cable ‘ from the host conmputer. YES NO fault corrected? Replace the BOARD ASSY.,MAIN. Increase the the setting position of the paper-thickness lever. YES ND * YE [s v N 5-10 Rev.
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LX-3(XI Service Manual Thwbleahooting 5.3 REPAIRING THE MAIN BOARD ASSEMBLY This section provides instructions for repairing a defective main board assembly. It describes various symptoms, likely causes, and t%eckp-oints. Checkpoints refer to pro~r waveforms, resistance values, and other values to be checked when evaluating the operation of any potentially faulty component. Check these values and take the appropriate action.
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Troubleshooting LX-300 Service Mimual Table 5-8. Repair of Problem in the main board assembly (Continued) 5-12 Rev.
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Tivu6/eahoot/ng LX-300 Service Manual 5.4 REPAIRING THE PRINTER MECHANISM For detailed procedures for replacing or adjusting parts, refer to Chapter 3, Disassembly and Assembly, and Chapter 4, Adjustments. If a problem or symptom recurs following an attempted repair, refer to Table 5-10 to try find other potential causes. Table 5-9.
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LX-300 Service Manual Troubleshooting Table 5-9. Repairing the Printer Mechanism (Continued) Problem Symptom A particular dot is missing. Self-test ]rinting is ~bnormal. Cause The printhead is defective. The printhead The printing is is cfef=ti’Je” too light, or The platen the print density is not ;:;:;ot uniform. adjusted. Check Point Measure the printhead coil resistance. It should be approximately 33.3 ohms. If the printhead is shorted, ak) check the drivers.
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Troubleshooting LX-300 Semice Manual Table 5-9. Repairing the Printer Mechanism (Continued) Problem Symptom Cause Cheek Point Solution The ribbon feeds properly only when the carriage The ribbon feed is abnormal. moves ‘n ‘ ne dlrectlon (I.e., it fails to feed when the carnage moves in the other direction). The planetary Move the carriage manually; ~h=k whether the Pknetay :::;ve gear turns in reverse and engages the gear. The ribbon mask is positioned incorrectly.
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CHAPTER 6 Maintenance Table of Contents 6.1 PREVENTIVE MAINTENANCE 6-1 6.2 APPLYING LUBRICATION 6-1 List of Figures Figure 6-1. LX-300 Lubrication Points. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2 List of Tables Table 6-1. Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1 Table 6-2. Lubrication Points. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Maintenance LX- Servica Manual 6.1 PREVENTIVE MAINTENANCE Preventive maintenance includes regular cleaning of the case exterior (using denatured alcohol), as well as occasional vacuuming of the mechanism’s interior to remove dust and paper debris. After cleaning the unit, check that it is adequately lubricated (as described in Section 6.2, below). Before returning the printer to the customer, inspect the springs, paper-feed rollers, and basic operation.
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LX-300 Service Manual Maintenance [ k.-.. f ’ : w n M-) IL- Figure 6-1. LX-300 Lubrication Points 6-2 Rev.
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( Appendix Table of Contents A.1 CONNECTOR SUMMARY A-1 A.2 CIRCUIT DIAGRAM A-5 A.3 CIRCUIT BOARD COMPONENT LAYOUT A-9 A.4 EXPLODED DIAGRAM A-10 A.5 CASE OUTLINE DRAWING A-14 List of Figures Figure A-1. Figure A-2. Figure A-3. Figure A-4. Figure A-5. Figure A-6. Figure A-7. Figure A-8. Figure A-9. Cable Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1 C130MAlN Board Assembly Circuit Diagram. . . . . . . . . . . . . . . . .
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LX3W Service Mhnual Appendix A.1 CONNECTOR SUMMARY Figure A-1 illustrates how the primary components are comected. Table A-1 sumrnari zes the functions and sizes of the connectors. I printer Mechanism I- MOTOR ASSY.,PF I I Release Lever Position Sensor I BOARD ASSY., PSB I PSE El’ EJ EEcl -P CN1 HOST COMPUTER BOARD ASSY.,MAIN m I CN1O CN11 CS BOARD , --------------------[Color Upgrade Kit ~ I I I ,. .- . . . . . . . . . . . . . . . ...$ Figure A-1. Cable Connections Rev.
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Appendix LX-300 Service Manual Table A-1. Connector Summary Board Connector Main Board Assembly CN1 CN2 CN3 CN4 CN5 CN6 CN7 CN8 Pins Function — Parallel, serial interface CR motor assembly PF motor assembly PSWPSE board assembly Printhead PE sensor HP sensor Release lever position sensor CS motor assembly (optional) Color ribbon sensor (optional) CS motor assembly (optional) Color ribbon sensor (optional) CS motor assembly (optional) Color ribbon sensor (optional) CN9 CN1O CN11 ,. .,, + .
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LX-31M Service Manual Appandix Table A-5. Connector Pin Assignments - CN5 Function Signal Name Pin I/o 1 0 HD 7 Head data 7 2 0 0 0 0 0 0 0 0 HD 1 Head data 1 HD 5 HD 3 HDCOM HDCOM HDCOM HD 2 HD 9 HD 4 HD 8 HD 6 Head data 5 Head data 3 Common (VP) Common (VP) Common (VP) Head data 2 Head data 9 Head data 4 Head data 8 Head data 6 3 4 5 6 7 8 9 10 11 12 Table A-6. Connector Pin Assignments - CN6 / Pin I/o 1 I 2 – Function Signal Name PE GND PE sensor Signal ground Table A-7.
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LX41M Service Manual Appendix I 1 T ,4 P ., 1 NU m l - 0 0 I w 1 + I . — 1- u r Figure A-3. C130 PSB Board Assembly Circuit Diagram Rev.
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Appendix LX-3(M Sarvice Manual :\> \ M 0. + z + m=== I t+ I N !.4 u-l IL 0. 1- -a= 1 :, . I ●1 3 ● ua mm M=F? . N In a ~ u-la! -1 Figure A-4. C130 PSE Board Assembly Circuit Diagram A-a Rev.
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IX-3tM Service Mhnuai Appendix A.3 CIRCUIT BOARD COMPONENT LAYOUT Swl fli SU2 ‘n’ “ 0 2 ~ ‘:3 81 9 RH2 RL= — Figure A-5. C130 MAIN Board Assembly Component Layout J-I 1 Figure A-6. C130 PSB/PSE Board Assembly Component Layout Rev.
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Appandix LX-3(M Samica Manual A.4. EXPLODED DIAGRAM %--0 . %--”—-”—l $ ? ........ (T i Figure A-7. LMOO Exploded Diagram (1) A-10 Rev.
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Appendix Rev.
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Appendix LX-WW Service Manual Table A-10. Part No. Reference Table ~ef.No. 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 131 132 133 135 200 250 300 410 411 412 500 501 502 503 A-1 2 Description HOUSING ASSY.,LOWER INSULATOR INSULATOR SHIELD PLATE COVER ASSY.,PRINTER ROLLER, DRIVEN HOLDER, ROLLER, DRIVEN COMPRESSION SPRING,73 COVER, ROLLER, DRIVEN EDGE GUIDE ASSY.
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LX-3W Service Manual Appendix Table A-10. Part No. Reference Table (Continued) Ref. No. 551 552 553 554 555 556 557 558 559 560 561 562 563 Rev.A Description LEVER, G, ADJUST BUSHING, PARALLEL, ADJUST SHAIT,FRICTION GEAR,34 SPURGEAR,25 C.P.B. SCREW (M3 X 8) COMPRESSION SPRING,800 COMPRESSION SPRING,500 DAMPER DAMPER,BASE SHEET,PE DETECTOR FRAME,TR,LEIT FRAME,TR,RIGHT ?ef.No.
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Appendix LX-WI Sewice Manual A.5 CASE OUTLINE DRAWING = c1 II II — — — — — = A r (’ r 132rnrn v L. \ l&J Figure A-9. LX-300 Case Outline Drawing A-1 4 Rev.