Epson LX-850 Specifiche

LX-810/850TECHNICAL MANUALEPSON

REV.-AFigure 1-1. Exterior View of the LX-81 0/850,.. ’1-2

REV.-A3.3 PULL TRACTOR C80006*The optional pull tractor C80006* provides optimu,m continuous paper handling. The pull tractor isespecially useful wi

REV.-A3.3.2 Pull Tractor Disassembly and Reassembly1. Remove the catch fastening the sprocket reduction gear to spocket mounting plate R. Then remove

REV.-A5.6.Remove the E-ring (6) from the sprocket shaft, then remove sprocket mounting plate R.(@-ring’”SprocketMounting Plate RFigure 3-15. Removal o

REV.-AReassembly1. Insertion of the paper guide roller onto the sprocket shaft should be in the direction indicated inFigure 3-17.2. When inserting th

REV.-ACHAPTER 4DISASSEMBLY, ASSEMBLY, ANDADJUSTMENT4.1 GENERAL REPAIR INFORMATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

REV.-AFigure 4-5.Upper Casing Removal-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5Fi

REV.-AFigure 4-42. Platen Gap Adjustment Position. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-28LIST OF TABLESTable 4-

REV.-A4.1 GENERAL REPAIR INFORMATIONThis chapter describes the procedures for removing, replacing, and adjusting the main componentsof the LX-8 10/850

REV.-ATo ensure optimal performance of the printer, be sure, following reassembly and adjustment, to .,@lubricate, apply adhesive, clean, and maintain

REV.-A4.2 DISASSEMBLY AND REASSEMBLYThis chapter details the disassembly procedures for the LX-8 10/850.As a rule, reassembly is performedby simply r

REV.-A1.2 SPECIFICATIONSThis section describes LX-8 10/8501.2.1 Hardware Specificationsprinlter specifications.Printing MethodSerial, impact, dot mat

REV.-A3. Unlock the two levers securing the printhead to the carriage by pulling them down. Then lift and :-.f~~remove the printhead.Figure 4-2. Pr

REV.-A4.2.2 Removal of CasingThis section details the procedure4.2.2.1 Upper Casing Removalfor removing the upper casing and the control panel (TAPNL)

REV.-A4. While lifting the upper casing, disconnect the cable of the control panel (TAPNL) from connectorCN3 on the TAMA board. Then remove the upper

REV.-A4.2.2.2 Control Panel (TAPNL) Removal1. Remove the upper casing (as described in the previous Section).2. Turn the upper casing over, push in th

REV.-A4.2.3 Removal of Circuit BoardsThis section describes the procedure for removing the TAMA Board and the TA filter unit.4.2.3.1 TAMA Board Remova

REV.-A4.2.3.2 TA Filter Unit Removal1. Remove the upper casing (refer to Section 4.2.2.1).2. Disconnect connector CN9 at the TAMA board. This connecto

REV.-A4.2.4 Removal of Printer MechanismThis section describes the removal of the platen unit, paper guide shaft, and printer mechanism. Theplaten un

REV.-A3. Remove the paper tension unit.Figure 4-13. Paper Tension Unit Removal4. Remove the GND spring.GND springFigure 4-14. GND Spring Removal4-11

REV.-A5. Turn the shaft holders at the left and right sides of the platen unit as shown in Figure 4-15. Lift andg,}:!~’-.remove the platen unit.tena.b

REV.-A4.2.4.2 Removal of Printer Mechanism1. Remove the platen unit and paper guide (refer to Section 4.2.4.1, immediately above).2. Disconnect the ca

REV.-Aa. Push Tractor Feed1. Use the pull-out unit.2. Do not perform reversefeeding greater than 1/6 inch.3. After paper end detection, accuracy of

REV.-A4.2.5 Disassembly of Printer MechanismThis section details the removal of componentsfrom the printer mechanism. Figure A-1 9 shows anexploded

REV.-A3. Loosen the two tabs securing the paper guide plate and spacer to the frame, and lift and removethe plate.SpacerFigure 4-19. Removal of Paper

REV.-A4.2.5.2 Removal of Paper-Feed Motor, Release Lever, and Release /Tractor Sensor1. Remove the printer mechanism (refer to Section 4.2.4).2. Disco

REV.-A5. From the inside of the frame, push the notch of the release lever outward. Remove the release Iever.LeverFigure 4-23. Removal of The Release

REV.-A4.2.5.3 Removal of Paper-End Sensor1. Remove the platen unit and paper guide (refer to Section 4.2.4. 1).2. Loosen the tab securing the paper gu

REV.-A4.2.5.5 Removal of Carriage Unit1.2.3.4.5.Remove the printer mechanism (refer to Section 4.2.4).Remove the printhead and disconnect the head cab

REV.-A6. Turn the printer mechanism over so that it is again face up. Rotate the lever on the left side of thecarriage guide shaft counterclockwise,

REV.-ANOTES FOR REASSEMBLY1. When reinstalling, position the carriage guide shaft and the head adjust lever as shown in Figure4-31.Guide ShaftFigure 4

REV.-A4.2.5.6 Removal of Carriage Motor1.2.3,4!5Perform Steps 1 to 5 of Section 4.2.5.4.Disconnect the motor cable from the carriage motor. Disconnect

REV.-ANOTES FOR REASSEMBLY:The following applies to E-ring reattachment:● When attaching a ring to the left pulley shaft, set it so that its opening

REV.-ATable 1-6. Envelope SpecificationsNOTES: “.*SizeNo.6 (166 Imm x 92 mm), No. 10 (240 mm x 104 mm)Quality Bond paper, Plain paper, Air mailThick

REV.-A4.2.5.7 Removal of Home-Position Sensorp..,:,1. Remove the carriage motor frame. Follow Steps 1 to 3 of Section 4.2.5.6.2. Push in the notch sec

REV.-A4.2.5.9 Disassembly of The Tractor Unit1. Remove the E-ring on the tractor shaft.2. Pull and remove the tractor shaft from the tractor frame.3.

REV.-ANOTES FOR REASSEMBLYWhen reassembling, align the phases as shown below.,4/’‘,, ’-,Figure 4-38. Tractor Phase Alignment----4-26

REV.-A4.3 ADJUSTMENTThis section describes the adjustment procedures necessary when the LX-8 10/850 printer isreassembled or when parts are reinstall

REV.-A0.4!5 & 0.01 mm--\PrintheadPlatenFigure 4-40. Platen GapAdjust Lever\Carriage GuidShaft Lever (LFrame (LeftSide)Figure 4-41. Carriage Guide

REV.-ACHAPTER 5TROUBLESHOOTING5.1 GENERAL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

REV.-A5.1 GENERALTroubleshooting is based on the idea that error symptoms vary according to the defective component.Troubleshooting may involve either

REV.-ATable 5-2. Symptom and Reference PagesSymptomProblemReference PagePrinter Fails to Operate with. Carriage does not move.Power Switch ON● Control

(1) Printer Fails to Operate with Power Switch ON9STARTNoUse correct ACinput voltage.-ENDYesF 1 on the TA filterReplace the fuse.YesMeasure the outpu

REV.-A(2) Abnormal Carriage OperationIconnectors CN5,connecting the SAMA circuitYesSecureconnectorsYesNo4YesReplacemove to the homethe printermechanis

REV.-APrinting AreaThe figures below show the printing area for cut sheets.4=182-257 mm(7. 2-10.1 “ )**1 ) Printable area*1 )8.5rnrY0.33 “ or mt\—iP

REV.-A(3) Faulty Printing during Self-Test, but Carriage Operation is Normal*Noconnector between the printermechanism and TAMA circuitboard correctly

REV.-APrinthead#7x5 COM. x19#18Ito #lo #2o #3o #4o #5O ~6o #7O .80 #9( Wire assignment)Coil Resistance:19.2 A 1.9 Q at 25°C(8etween each dot wire and

REV.-A(4) Abnormal Paper Feed (but normal printing)STARTNoSet the papercorrect I y.-/+>~per’T;e;hLo Norotate smoothly whenReplace the Printerturned

REV.-A(5) Abnormal ControlPanel Operationconnector CN3between the controlNoReinsert connectorCN3 correctlyNo4NoReplace the TAMAcircuit board?YesRepla

REV.-A(6) Faulty Printing in ON-LINE ModeNOTE: [t is assumed here that the host computer is operating normally.aSTARTPerform self-test.NoRefer to othe

REV.-A5.3 UNIT REPAIRThis section indicates the points to be checked in response to problems, and the measures to be takenbased on the result of the

REV.-A5.3.1 TAMA Control Board Unit RepairThe following chart shows the main components on the TAMA board.Table 5-3. TAMA Board Parts ListLocation Par

REV.-ATable 5-4. TAMA Board Unit Repair,= ,.%,”.-m..f“ “, ,.,5-12

REV.-ATable 5-4. TAMA Board Unit Repair (Continued)Problemrhe printer~oes not op-?rate at all.SymptomThe CPU isnotDperating.Causerhe reset:ircuit is n

REV.-ATable 5-4. TAMA Board Unit Repair (Continued)ProblemSymptomCauseCheck pointSolutionThe printerThe CPU isThe CPU isCheck for oscillator signal at

REV.-AI4.0 “ -10.0 “,101 mm-254mmI*1)1APrintable areaI*2)1Printablearea+9mm,0.35 “or more+9mm,0.35 “or mqretPrintableareao00000004-ABC0000----------

REV.-ATable 5-4. TAMA Board Unit Repair (Continued)Problem SymptomCauseCheck pointSolutionrhe Carriage The CarriageIC 3B or ICAt IC 1A, check the inpu

REV.-ATable 5-4. TAMA Board Unit Repair (Continued)5-16

REV.-ATable 5-4. TAMA Board Unit Repair (Continued)ProblemSymptom CauseCheck point Solution‘aper is not The paperThe IC 3B or At Q21 - Q24, check the

REV.-A5.3.2 Printer Mechanism RepairFor detailed procedures for replacingReassembly”) and 4.4 (“Adjustment”).,F:’:+.-or adjusting parts, refer to Sec

REV.-ATable 5-5. Printer Mechanism Repair (Continued)ProblemSelf-testprinting isabnormal.‘aper feed isjefective.SymptomA particulardot fails toprint.T

REV.-ATable 5-5. Printer Mechanism Repair (Continued)Problem SymptomCauseCheckpointSolutionRibbon feed The ribbon is The ribbonDismount the ribbon car

REV.-ACHAPTER 6MAINTENANCE6.1 PREVENTIVE MAINTENANCE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Proper maintenance assuresoccurrence of malfunctions.REV.-Aoptimal and long-term printer performance and and minimizes the6.1 PREVENTIVE MAINTENANCETh

REV.-ATable 6-2. Lubrication Points (Refer to Figure 6-2)Ref. No. Lubrication PointsLubricant(1)Shaft which sets paper feed reductionG-26(2)Contact po

REV.-AFigure 6-2. LX-81 0/850 Lubrication Points6-3

REV.-AInk RibbonType:Color:Reliability:ReliabilityMean Cycles BetweenFailure (MCBF):Mean Time BetweenFailure (MTBF):Life of PrintheadSafety ApprovalSa

REV.-AAPPENDIXA.1 INTEGRATED CIRCUITS WITHIN THE LX-810/850 . . . . . . . . . . . . . . A-1A.1.l CPU PPD781OHG (2C) . . . . . . . . . . . . . . . . .

REV.-ALIST OF TABLESTable A-1.Table A-2.Table A-3.Table A-4.Table A-5.Table A-6.Table A-7.Table A-8.Table A-9.Table A-1 O.Table A-1 1.Table A-1 2.Tab

REV.-AThis appendix provides detailed information about the integrated circuits, signal functions, capabilities,and other aspects of the LX-8 10/850 p

REV.-AA.1.l CPU /APD7810HG (2c)The pPD78 10/781 1 HG is comprised of an 8-bit timer counter, an 8-bit A/D converter, 256 bytes ofRAM, and a serial int

REV.-A\, o\\cmu+”A0$0:o00+br.bLovLm~nn.n.PORT DIIPORT CIIPORT BHPORT AJmI1II(m=7IDHQ!7vm0C-4xxFigure A-2. KPD781 0/7811 HG Block DiagramA-3

Table A-2. PPD781 O Mode Setting<,”>* -:; ‘Mode 1Mode OExterna! Memoryo04K, addresses O to OFFFo1 (Note)16K, addresses O to 3FFF1 (Note)1 (Note)

REV.-ATable A-5. NPD7810/7811 Port FunctionsPinSignal DirectionDescriptions1-8 PAO-7In/OutPort A 8-bit 1/0 with output latch. 1/0 possible with mode A

REV.-ACPU Timingf“?Refer to Figures A-3 through A-5 for CPU timing diagrams. Three oscillations define one state. The OP%.<.code fetch requires fou

REV.-AA.1.2 E05A30 (3B)This gate array was newly developed for this printer. Its functions are as follows:1. Parallel l/F2. Address decoder3. Control

REV.-ATable A-6. E05A30 Pin FunctionsPin No.1234567891011121314151617181920212223242526272829303132SignalHD7HD8HD9CRACRBCRCCRDPFAPFBPFCPFDBUSYPEERRRE

REV.-AElectrical SpecificationsPower ConditionsFrequency RangePower Consumptioninsulation ResistanceDielectric Strength120V Version220/240V VersionEnv

REV.-AA.1.3 2(964C SRAM (3D)The 2064C is an 8K-byte CMOS static RAM. The 2064C has low power consumption, and itsinput\ output level is compatible wit

REV.-AA.1.4 ER59256 (lC)The ER59256 is a 256-bit nonvolatile CMOSbe transferred serially over the data bus.<:;,.$: .Y.’RAM containing 16 words x 16

REV.-AA.1.5 SLA7020M (1A)The SLA7020M ia a two-circuit, 4-phase step motor driver for unipolar constant current driving.&I 2 3 4 5 6 78 91011

REV.-AA.1.6 pPC494C (3A)The ~PC494C is pulse width modulation control. The block diagram is shown in Figure A-13 showsReferenceLow VoltageIII.*.. ‘

REV.-AA.2 EXPLODED DIAGRAMS ANDThe exploded and schematic diagrams shown inreference.Power SWFIACSCHEMATICSFigures A-1 4 to A-22 are provided as addit

REV.-ARIIoGNDSwl41IONLINE SWSW231FFF SW200QSW32()oLF SWSW4d~ LQ/EJ ‘w(IBZI[n!100BUZZER), GREENLED2GREEN8READY LPLED37,)oONLINE LPLED46<boPE LP90+

REV.-Aur“%’g :L__4-4Ey●Ei3’aFigure A-1 6. TAMA Board Component LayoutA-1 5

REV.-A1.2.2 Firmware Specifications (ESC/P)Control CodeESWPTM level ESC/P-81(EPSON Standard Code for Printers)Printing DirectionBi-directional printi

REV.-APrinting ColumnsSee Table 1-10Table 1-10. Column Width (maximum characters/line)I(Type of LettersColumn Width (CPL)Column/inch (cpi)Pica8010Elit

NOTICE“ All rights reserved. Reprc~duction of any part of this manual in any fromwhatsoever without SEIKO EPSON’s express written permission is forbid

REV.-A1.3 INTERFACE OVERVIEWThe standard 8-bit parallel interface provided with this printer meets the specifications described below.Data Format8-bi

REV.-ATable 1-11. Connector Pin Assignments and Signal Functions (Cont.)Pin No.Signal Name Return Pin No.DIRFunctional Description14AUTOFEED-XT—Inif “

REV.-Ac!Table 1-12 shows Printer Select/Deselect (DC l/DC3) controL including relations amon9 ON-LINE, . .SELECT-IN input, DC l/DC3 and interfac

1.4 DIP SWITCH AND JUNIPER SETTINGSThis section describes DIP switch settings for the LX-8 10/850 printer.1.4.1 DIP Switch SettingsThe two DIP switche

REV.-A1.5 SELECTYPE FUNCTIONSelecType allows the user to choose fonts and the printing mode easily. This function provides forselection of Draft, Ro

REV.-A1.7 TEAR-OFFThe Tear-Off functionFUNCTIONcan be enabled by making the appropriate DIP switch setting, and will operatewhen the release-lever i

REV.-A1.8 OPERATING INSTRUCTIONSThis section describes the self-test, hexadecimal dumpbuzzer operation.1.8.1 Self-Test9: ;<=>WABC: ; <=>

REV.-Aand FORM-FEED1.8.2 Hexadecimal Dump FunctionThe printer enters the HEX-DUMP mode when it is poweredbuttons are pressed down.In the HEX-DUMP mode

REV.-A1.8.3 Buzzer OperationThe buzzer sounds under the following conditions:BEL code:The buzzer sounds for 0.1 second when a BEL code is input.Carri

REV.-A1.8.4 Printer InitializationThe printer is initialized when:1 ) AC power is turned on2) The INIT signal is inputHere is a brief summary of the i

REV.-APRECAUTIONSPrecautionary notations throughout the text are categorized relative to 1) personal injury, and 2) damageto equipment:DANGER Signals

REV.-A1.6 MAIN COMPONENTSThe main components of the LX-8 10/850 printer are designed for easy removal and replacement tomaintain/repair the printer.T

REV.-A1.6.1 TAMA BoardThe use of the ~PD78 10HG CPU simplifies the main control board circuit design.. PROM (3C)-SRAM (3D)Gate ArrayE05430 (3B)- CPUL

REV.-A1.6.3 TA Filter UnitThe TA filter unit contains a power cord ( 120V Version) or AC inlet (220/240V Version), power switchfuse, filter circuit,

REV.-A1.6.5 HousingThe LX-8 10/850 housing consists of the upper and lower cases. The upper case houses the controlpanel. The lower case houses the pr

REV.-ACHAPTER 2PRINCIPLES OF OPERATION2.12.2OVERVIEW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

REV.-A2.2.5.5 Printhead Drive Circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-412.2.5.6 Printhead Software Control .

REV.-AFigure 2-36.Figure 2-37.Figure 2-38.Figure 2-39.Figure 2-40.Figure 2-41.Figure 2-42.Figure 2-43.Figure 2-44.Figure 2-45.Figure 2-46.Figure 2-47.

REV.-A2.1 OVERVIEWThis chapter describes the signals at the connectors linking the primary components of the LX-8 10/850.These components include the

REV.-AFiiEElrModel 3D 10 Printer MechanismBoardCR motorReleasePF motorPEHOMEControlPanel1 OPin2Pin12Pin2PinII36 PinmLJParalel l/FHEAd,TAMA BoardcE:5.

REV.-A2.1.2 Outline of Printer Mechanism OperationThe Model 3D 10 is a 9-pin serial dot matrix printer. Because the frame and many of the componentsar

REV.-APREFACEThis manual describes functions, theory of electrical and mechanicaloperations, maintenance, and repair of the LX-8 10/850.The instructio

REV.-A2.1.2.1 SensorsThe printer mechanism is equipped with the following sensors:Paper-End (PE) SensorHome-Position (HP) SensorFriction/Tractor Senso

REV.-AHome-Position Sensor (HP sensor)Figures 2-5 and 2-6 show the home-position sensor. The sensor switch is ON when the carriage is atthe home posit

REV.-AFriction/Tractor Sensor:$-2!+.The release sensor senses the position of the release lever in order to detect whether tractor feed orfriction fee

2.1.2.2 MotorsThis printer has the following motors:Carriage motor (step motor)Paper-feed motor (step motor)REV.-ACarriage MotorThe carriage motor is

REV.-A2.1.3 Circuit OverviewFigure 2-10 shows a blockf.h,,.diagram of the TAMA board circuitry.i PD78 10HG(2 c)BEEPROM(1 c)rPROM32KB(3C)RAM8KB/32KBh

REV.-A● E05A30 gate array (3B)The E05A30 functions are as follows1. Parallel l/F2. Address decoder3. Data address multiplexer4. PF motor control5. CR

REV.-A2.2 PRINCIPLES OF OPERATIONThis section describes the operation of each component.2.2.1 Power Supply CircuitThe electrical power required by th

2.2.1.1 TA Filter UnitThe filter board and the transformer are integrated into a single unit. This unit alsopower switch and the inlet for the incolmi

REV.-A2.2.1.2 + 12V DC Power Supply Circuit:As Figure 2-13 shows, a half-wave rectifying circuit is used to convert the incoming 12VAC voltageto + 1

REV.-A2.2.1.3 +24V DC Power Supply CircuitThe incoming AC + 26V is full-wave rectified by diode bridge DB 1, generating a DC voltage of about36V. This

REVISION TABLEREVISION DATE ISSUEDCHANGE DOCUMENTII A IMar 27, 1989I1st issueIEfy,-...,,.;. . . .v

REV.-ASwitching Regulator CircuitWhen the voltage is supplied from the rectifying circuit, a 27 KHz switching pulse based on the externalC3-R 10 circu

REV.-AFeedback CircuitA voltage switching circuit is formed by RI 1, R 12, and R16, and the potential of the +24V outputvoltage is fed back to PPC494

REV.-AOver-Current Protection CircuitError amplifier EA2, in the KPC494, detects over-current caused either by abnormal operation, or byabnormality i

REV.-ASwitching Pulse OutputThe output of the error amplifier in KPC494C is determined by the difference between the output pulseof the internal oscil

REV.-AChopping Circuitc., ‘:!A chopper circuit consisting of diode D 1 and coil L1 is utilized at the output stage. If Q1 in ON, the-,coil acts as a r

REV.-A2.2.1.4 +5V DC Power Supply CircuitThe +5VDC is generated by the switching and step-down action that Q6 applies to the 24VDC suppliedfrom the 24

REV.-A2.2.2 Reset CircuitThis circuit generates the signal that initializes the printer, and is made by monitoring the + 5 and + 24Vvoltages when the

REV.-A2.2.2.2 Operation at ResetThe reset signal causes the following operations to occur.1. The printhead carriage moves to the left-side home positi

REV.-A2.2.3 Carriage OperationThis section describes the carriage operation.2.2.3.1 Carriage MechanismThe carriage mechanism includes the printhead,

REV.-A2.2.3.3 Carriage Drive Circuit Block DiagramFigure 2-25 shows a block diagram of the carriage motor drive circuit. In this circuit, the phase sw

REV.-ATABLE OF CONTENTSCHAPTER 1.GENERAL DESCRIPTIONCHAPTER 2.OPERATING PRINCIPLESCHAPTER 3.OPTIONAL EQUIPMENTSCHAPTER 4.DISASSEMBLY, ASSEMBLY, AND AD

REV.-A2.2.3.4 Carriage Motor Drive CircuitThis unit utilizes an SLA7020M IC for the step motor drive. This IC causes the motor to be driven atthe sp

+24VPhase XIr6I● F24V(——————.——58TII1)tGpIIII$ !1234———.—.———+5V+5VR30PR591.0D547KC15A470pCRANOTE: Phase CD is equivalent to the above.Figure 2-27. SL

REV.-ASLA7020M Phase Signal Input CircuitAlthough most step-motor control IC’S input 4-phase data directly, the SLA7020M requires a specialtype of pha

REV.-AIn the case of 1-2 phase excitation:Figure 2-30 shows the excitation signal input circuit. When the Td terminal is LOW, the SLA702M cancut off t

REV.-AReference Voltage Generation CircuitFigure 2-32 shows the reference voltage generation circuit and Table 2-3 shows the reference voltage.The ref

REV.-AConstant Current Drive CircuitThe constant current drive circuit is shown in Figure 2-33 (for A-phase only), and the waveforms foreach part are

REV.-AWWF :.-.-J---------.------------0{IVRSI-.-.--------- ------- ?------ ------- -1Vb :,------ : ----- . : - . ---- s -----------------------Q{#VT1,

REV.-A(7)IOFF flow then causes current flow in R30 to change direction. COMP1 feedback voltage VRS(V-) thereby drops below VREF, and COMP1 again i

REV.-A2.2.3.5 Carriage Motor Software ControlThis section describes the carriage motor software control.Excitation SystemThe excitation system is dete

REV.-ABecause the carriage is driven by a step motor, the printing direction can be changed at any time, andthe carriage can be stopped at any positio

REV.-A1.11.21.31.41.51.61.71.81.6CHAPTER 1GENERAL DESCRIPTIONFEATURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

REV.-APrinting AreaThe printing areais defined as starting 26 phase switching times following the home position.1III--JvLODJm-J_Acceleration AreaPrint

REV.-A2,2.4 Paper FeedThis section describes the paper-feed operation.2.2.4.1 Paper Feed Mechanism OperationFriction feeding is used for cut sheets,

REV.-APush Tractor Feed OperationWhen the push tractor unit is used, the paper is set such that its holes mesh with the tractor pins alongthe tractor

REV.-A2.2.4.3 Paper-Feed Motor Drive CircuitThe paper-feed motor drive circuit is shown in Figure 2-40. The paper-feed motor is a step motor whichcan

REV.-A2.2.4.4 Paper-Feed Motor Software ControlThe paper feed motor is a 48-pole step motor and is open-loop controlled. When 2-2 phase excitationis u

REV.-A2.2.5 PrintheadThis section describes the printhead operation.2.2.5.1 Printhead Printing OperationThe dot-wire operation during printing is a

REV.-A2.2.5.3 Printhead Drive Circuit Block DiagramGate array E05A30 is used as an 8-bit + l-bit data latch.The CPU determines the pulse width for

REV.-A2.2.5.5 Printhead Drive CircuitThe drive pulse width is adjusted using CPU port PC6.+24VJ80 HDCOMI11GAO HD1HD163 R20,,, IKD1647 Q75E05A30o HD2H

REV.-A2.2.5.6 Printhead Software ControlDuring operation at 900 PPS, one print cycle is performed at each phase switching step, so as to meetthe speci

Drive PulseWidth(ils)45C400350300Figure 2-48.(425)05II1111It111111toI1It111111I111115);)I22.023.024.025.0 26.0(21 .6)(26.4)Drive Voltage (VDC)Relation

REV.-AFigure 1-9.Lever Position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

REV.-A2.2.6 Host InterfaceThe host interface circuit is shown in Figure 2-49. STROBE pulses from the host computer pass throughthe low-pass filter, c

REV.-A2.2.7 EEPROM CircuitThe EEPROM stores in its memory the current feed position of continuously fed paper, as well as thecurrent panel settings.

REV.-A2.2.8 Ribbon-feed MechanismThe ribbon-feed mechanism consists of the ribbon cartridge and the ribbon-feed section. Theribbon-driving gear is al

REV.-ACHAPTER 3OPTIONAL EQUIPMENT3.1 INTERFACE OPTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

REV.-AFigure 3-14.Figure 3-15.Figure 3-16.Figure 3-17.Table 3-1.Table 3-2.Table 3-3.Table 3-4.Table 3-5.Table 3-6.Table 3-7.Removal of Sprocket Mounti

REV.-A3.1 INTERFACE OPTIONSThe LX-8 10/850 is able to utilize the Model 8100 series optional interfaces. The main interfaces arelisted in Table 3-1.Ta

REV.-AJumper SettingsTable 3-2. Jumper Settingsc?,,:.FunctionJ1ON: “TTY TXD” is brought to -t- 12V through 470 ohm register.J2ON: “TTY TXD RET” is con

REV.-ATable 3-4. Bit Rate SettingsBit Rata SW1-7Swl-1SW1-4SW1-3Bit RataSW1-7Swl-1SW1-4(bps)SW1-3(JB4)(JB3) (JB2)(JB1 )(bps)(JB4)(JB3) (JB2)(JB1 )75ONO

REV.-A3.2 CUT SHEET FEEDER C80612*The LX-8 10/850 printer can use C806 12* cut sheet feeder. This cut sheet feeder has the followingfeatures:1. Cut s

REV.-A3.2.1 Cut Sheet Feeder C80612* SpecificationsThis section details the operating specifications for Cut Sheet Feeder C806 12*.3.2.1.1HopperGener

REV.-A1.1 FEATURESThe LX-8 10/850 is a small, light-weight, low-cost, advanced paper handling printer comparable to theLX-800. Its main features are:1

REV.-A3.2.1.3 PrintingSee Figure 3-2.NOTES:Area3mrn(0.i 2’”)3mm(0.i 2“)min.Printable areamin.8.5mm(0..33”)min.IAPrintablearea113.5mm(0.53”)approx.ABCX

REV.-A3.2.1.4 Dimensions and WeightDimensions:NOTE: DimensionsWeight Approx.444 mm (1 7.5 inches) (Width) X 434 mm (1 7.1 inches) (Depth) X 416 mm(1

REV.-A3.2.2 Cut Sheet Feeder Operating PrinciplesC‘+..The cut sheet feeder is driven by firmware incorporated in the printer. The feeder need not beel

REV.-A3.2.2.1 Mechanism OperationPaper is loaded between the paper holder and the paper loading rollers. When the paper feed motorrotates in reverse,

REV.-A3.2.3 Cut Sheet Feeder Disassembly and ReassemblyThis section describes the procedure for removing the hopper unit of the C806 12’ cut sheet fe

REV.-A1. Remove side covers L and R.Side cover (L) .,.Side cover (R)+Figure 3-5. Side Cover Removal2. Remove the E-ring (6) on the paper loading rolle

REV.-A3. Remove the 2 E-rings (6) on the paper support shaft.$!:?.,. . . . . ..E-ring (6)E-ring (6)Figure 3-7. E-Ring Removal4. Remove the shaft holde

REV.-A5. Remove the E-ring (6) on the paper support shaft (See Figure 3-9)6. Lift, together, the hopper unit and the paper support shaft.Paper Loading

REV.-A3.2.4 Cut Sheet Feeder Preventive MaintenanceThe cut sheet feeder C806 12* is well designed and requires only a minimum of preventive maintenanc

REV.-AFigure 3-11. Lubrication Point (2)3-15