EPSON TERMINAL PRINTERLG1-570/lo7cJL4000566REV.-B.
REV.-BNote:Table 1-2. Optional UnitsModelDescriptionC80637*Single-bin cut-sheet feeder (80-column)C80638*High-capacity cut-sheet feeder (80-column)C80
REV.-B(5) Control Panel Operation is AbnormalASSY MAIN connectedReinsert connector CN3correctly.k“NoIs thefault corrected?YesIT7ENDvNoReplace the BOAR
(6) Printing of Data Sent by the Host Computer is FaultyNOTE: It is assumed here that the host computer is operating normally.Perform self-test printi
IREV.-B5.3 REPAIR OF THE MAIN BOARDThis section provides instructions for repairing the BOARDdescribes various symptoms, likely causes, and checkpoint
REV.-BProblemrhe printerioes not op-?rate at all.The carriageoperatesabnormally.Table 5-4. Repair of a Problem in the BOARD ASSY., MAIN (Cont.)Sympt
ITable 5-4. Repair of a Problem in the BOARD ASSY., MAIN (Cont.)ProblemSymptomCause CheckpointSolutionSelf-test print-ing isabnormal.Self-test isnot
REV.-B5.4 REPAIR OF THE PRINTER MECHANISMFor detailed procedures for replacing or adjusting parts, refer to Chapter 3, Dkassemb/yandAssemb/y,and Chapt
REV.-BITable 5-5. ReDair of the PRINTER MECHANISM (Cont.)ProblemSymptomCause CheckpointSolutionSelf-test printing isA particular dotThe printhead isMe
REV.-BTable 5-5. ReDair of the PRINTER MECHANISM (Cont.]I—rProblemSymptomCauseCheckpointSolutionThe ribbon feed isThe ribbon is notThe ribbon car-Dism
REV.-B6.16.2CHAPTER 6MAINTENANCEPREVENTIVE MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
REV.-B6.1 PREVENTIVE MAINTENANCEPreventive maintenance includes regular cleaning of the case exterior (using denatured alcohol), as wellas occasional
REV.-B1.2 SPECIFICATIONSThis section provides specifications1.2.1 HardwarePrinting methodPin configurationFeeding methodsLine spacingPaper insertionPa
REV.-ATable 6-2. Lubrication Points (Refer to Figure 6-2)Ref. No.Lubrication PointsLubricant11/4 of the perimeter of the top edge of the gear (8.5 mm,
REV.-AFigure 6-2. LQ-570 Lubrication Points6-3
REV.-B6-4
REV.-BAPPENDIXA.1A.2A.3A.4A.5CONNECTOR SUMMARY. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
REV.-BTable 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.Table A-1 3.Table
REV.-BA.1 CONNECTOR SUMMARYFigure A-1 illustrates the interconnection of the primary components. Table A-1 summarizes thefunctions and sizes of the co
REV.-BTable A-1. Board Connector SummarvBoardConnectorFunctionPinsBOARD ASW.,CN 1Parallel interface36MAIN (C062 MAINCN2Optional interface card36BOARD)
REV.-BTable A-2. CN2 BOARD ASSY., MAIN (C062 MAIN) Table A4. CN4 BOARD ASSY., MAIN (C062 MAIN)No.1/0 Signal NameFunction1- +5+5 VDC2- +5+5 VDC3 - +5+5
IIIIIIIIIIIREV.-BTable A-7. CN7 BOARD ASSY., MAIN (C062 MAIN)Table A-13. CN13 BOARD ASSY., MAIN (C062 MAIN) ~TfiNo.1/0 Signal NameFunction10HD3He
.zv., .,,...,,,III!,I:o~tb-1I JLI“wiWrII[.-1 :--jDiagramIPOWERFilter(C062 PSBRectlf LerFigure A-4. BOARD ASSY.,A-7
REV.-B● Use the paper tension unit.● Do not use multi-part cut-sheet forms, except with front insertion.● Do not perform reverse feeds greater than
REV.-B“’T-----III$3-LII t 7TTI1INw.‘f.Figure A-5. BOARD ASSY., POWERI(C062 PSB Board) Circuit Diagramf,. :,,.‘c.>:,.A-8
;JimRectifier 1FilterFigure A-6. BOARD ASSY., POWER SUPPLY (C062 PSE BOARD) Circuit Diagram (Annotated) 1A-9
REV.-Bf,.,,~,$,,,,,,.,,I!I1t-..x.1L—,4-----,+t<z.Figure A-7. BOARD ASSY., POWER SUPPLY (C062 PSE Board) Circuit DiagramA-1 O. .
REV.-B1——-—i iji =IIi-–*Uo-1 ‘1#p l-k‘m\zuFigure A-8. BOARD ASSY., PANEL (C062 PNL BOARD) Circuit DiagramA-1 1
REV.-BA-3. CIRCUIT BOARD COMPONENT LAYOUTIJ.--,tII11191III11111.--1III11I1111II111I111tt1Ii11Ia---)OZJ45+‘, EIN3 ,,:,,Jy; ,,----1;5 ;,p:f:..; ,,,. ..
REV.-BC3-11-C9 I(—.- 1. “Figure A-10. BOARD ASSY., POWER SUPPLY (C062 PSB BOARD) Component LayoutA-1 3
REV.-Bc,. ::,;,=.LIASSY 2002850 001Figure A-1 1. BOARD ASSY., POWER SUPPLY (C062 PSE Board) Component LayoutA-1 4.,---{, .,:’,.
REV.-BZluoZr —Vlr —alr —Figure A-1 2. BOARD ASSY., PANEL (C062 PNL BOARD) Component LayoutA-1 5
Figure A-1 3. LQ-570 Exploded Diagram.A-1 6
REV.-BA-1 9
REV.-BTable 1-4. Specifications for Cut Sheets (Carbonless Duplicating Paper)NOTES: ●●●NOTES: ●●●●●●WidthLengthThicknessWeightQualityCopies182 mm to
REV.-ATahici A.1 A Part Nn. Rafermwxi Table. ““. ., . . . . . . . . . ----.. ---- ----- - ----Ref. No. Description Ref. No.Description100 HOUSING ASSY
REV.-ATable A-14. Part No. Reference Table (Cont.)Ref. No,567568569570571572573574575576577578579580581582583584585586587589590591592DescriptionSPUR G
REV.-AA.5 CASE OUTLINE DRAWING.u“IJ1-b-1.368 mmI151 mc-q?.,@ ::-. ,.,.Figure A-1 7. LQ-570 Case Outline DrawingA-22
.IC-71IIlau4—------lt-“’mm~151 mFigure A-1 8. LQ-107O Case Outline DrawingA-23
EPSONSEIKO EPSON CORPORATIONPRINTER DIVISIONEPSON OVERSEAS MARKETING LOCATIONSEPSON AMERICA, INC.EPSON DEUTSCHLAND GmbH20770 Madrona AvenueZulpicher
EPSON,<” ,\Printed in Japan91 .09-.5-G
AddendumThe AP5000 is mechanically and electronically thesame as the LQ-570. The AP5500 is mechanically andelectronically the same as the LQ-1070.All
LQ-570/1070ActionPrinter™ 5000/550024-PIN DOT MATRIX PRINTERSTM-LQ57AP5
LQ-570/1070SERVICE MANUALEPSON@Printed on Recycled Paper
NOTICE* All rights reserved. Reproduction of any part of this manual in any formwhatsoever without SEIKO EPSON’s express written permission is forbidd
REV.-BPrintable areaSee figures 1-3, 1-4, and 1-5top insertion 148 - 257 mm (5.8 - 10. 1“)148 - 257 (x 420) mm (5.8 - 10. 1“ {x 16.5))front insert
REV.-APRECAUTIONSPrecautionary notations throughout the text are categorized relative to 1) personal injury, and 2) damageto equipment:DANGERSignals a
REV.-BPREFACEThis manual describes functions, theory of electrical and mechanicaloperations, maintenance, and repair of the LQ-570/1070.The instructio
REV.-BREVISION SHEETREVISONDATE ISSUEDCHANGE DOCUMENTAJune 20, 1991 1st issueBJuly 26, 1991Added information for the LQ-1070:l-i, l-ii, l-l- l-8, l-10
REV.-ATABLE OF CONTENTSCHAPTER 1.CHAPTER 2.CHAPTER 3.CHAPTER4.CHAPTER5.CHAPTER6.APPENDIXGENERAL DESCRIPTIONOPERATION PRINCIPLESDISASSEMBLY AND ASSEMBL
REV.-B1.11.21.31.41.51.61.7CHAPTER 1GENERAL DESCRIPTIONFEATURES...
LIST OF FIGURESREV.-BFigure 1-1.Figure 1-2.Figure 1-3.Figure 1-4.Figure 1-5.Figure 1-6.Figure 1-7.Figure 1-8.Figure 1-9.Figure 1-10.Figure 1-11.Figure
REV.-B1.1 FEATURESThe LQ-570/1070 are small, light-weight, low-cost, printers with advanced paper handling that iscompatible with the LQ-510/550/1010.
REV.-BModelc8063711 C8063811 High-caoacity cut-sheet feeder (80 column)ITable 1-2. Optional UnitsDescriptionSingle-bin cut-sheet feeder (80 column)c80
1.2 SPECIFICATIONSThis section provides specifications for the LQ-570/1070 printer.1.2.1 Hardware SpecificationsPrinting method Serial, impact, dot ma
REV.-B(80-column):● 1) 13 mm (0.51 in.) or more when a paper width of 101 mm (4 in.) to 241 mm (9.5 in.) is used.24 mm (0.9 in.)(rear insertion)\ 2
REV.-Bl Use the paper tension unit.0 Do not use multi-part cut-sheet forms, except with front insertion.0Do not perform reverse feeds greater than l/6
REV.-BTable 1-4. Specifications for Cut Sheets (Carbonless Duplicating Paper)Width182 mm to 2 16 (‘364) mm (7.2 in. to 8.5 (‘I 4.3) in.)Length 257 mm
REV.-BPrintable areaSee figures 1-3, l-4, and l-5I1364mmil( 14 3”)maxII(80 column):top Insertlo”148.257 mm (5 a-10 1”)146-257(*420)mm(56-101”1~16511fr
REV.-B(80 column):* 1) 13 mm (0.5 1 in.) or more when a paper width of 101 mm (4 in.) to 24 1 mm (9.5 in.) is used. 24mm (0.9 in.)(rear insertion)/ 26
REV.-B220 to 240 V versionRated voltageInput voltage rangeRated frequencyInput frequencyRated currentPower consumptionInsulation resistanceDielectric
REV.-A1.2.2 FirmwareSpecificationsControl codeESC/PTM level ESC/P 2(EPSON standard code for printers)Printing directionBidirectional with logic seekin
REV.-BNOTES: High-speed draft is valid if the printer status is as follows:0 High-speed draft is selected by DIP switch.l Emphasized character mode is
REV.-BPinsTable 1-9. Printing (Bit Image Mode)Bit Image Printing ModeDensity (dpi)Printable DotsPrinting Speed tips)8Single-density60480(*8 16)2 1 .o8
REV.-ATable l-10. Character Matrix and Character SizeLQ, proportional, condensedNOTES: 0 HDD is horizontal dot density in dots per inch.0 Face matrix
REV.-A1234;ii9101112131415161718192021222324(Typical draft character)(Typical LQ character)Ascender areaDescender areaRIGHTSPACECharacter width (CW)12
REV.-B220 to 240 V version Rated voltageInput voltage rangeRated frequencyInput frequencyRated currentPower consumptionInsulation resistanceDielectric
REV.-A1.3 INTERFACE OVERVIEWThe printer has a parallel interface with the specifications described below.1.3.1 Parallel InterfaceSpecifications for th
Table l-l 1. Connector Pin Assignments and Signal Functions (Cont.)REV.-As a line feed upon input of theGND--Ground for twisted-pair grounding.Not use
REV.-A1.4 CONTROL PANELOn the control panel are: a power button (labeled OPERATE), 7 non-lock type buttons, and 19 indicators.Figure 1-7. Control Pane
REV.-A(7) FONT ButtonPressing this button selects a font, and pressing it continuously selects the next one, sequentially. TheFONT LED indicates the c
REV.-A1.5 DIP SWITCHES AND JUMPER SETTINGThis section describes the DIP switch selections and jumper setting for the LQ-570 printer.1.5.1 DIP Switch S
REV.-A1-2ONONOFFOFFONONOFFOFFTable 1-14. International Character Set Selection1-3CountryONU.S.OFFFranceONGermanyOFFU.K.ONDenmark 1OFFSwedenONItalyOFFS
REV.-A1.6 OPERATING INSTRUCTIONSThis section describes the self-test and hexadecimal dump functions and also includes the error states,printer initial
REV.-A1.6.3 Paper-out Detection and Forms Override FunctionWhen the paper-out detector, attached to the printer mechanism, detects a paper-end, the pr
REV.-A(a) Initializes printer mechanism.(b) Clears input data buffer.(c) Clears downloaded character set.(d) Clears print buffer.(e) Returns printer s
REV.-AAutomatic cut-sheet loading and ejection with cut-sheet feederMove the release lever to the friction-feed position, and place the sheets into th
REV.-A1.2.2 Firmware SpecificationsControl codeESC/PTM level ESC/P 2(EPSON standard code for printers)Printing directionBidirectional with logic seeki
REV.-BShort-tear-offTo access the short-tear-off function, press the TEAR-OFF button. The release lever must be in the tractorposition. The paper adva
REV.-A1.6.11 Printer Protection for Heavy-Duty PrintingThis printer has a printhead protection function to prevent it from overheating and to protect
REV.-B1.7 MAIN COMPONENTSThe main components of the LQ-570/1070 printers are designed for easy removal and replacementto maintain and repair the print
REV.-B1.7.2 C062 PNL Board (Control Panel Circuit Board)The CO62 PNL board is the LQ-570/1 070 control panel, which includes the indicator LEDs, switc
REV.-B1.7.4 Printer Mechanism (M-5E10/M-5E60)The M-5ElO/M-5E60 printer mechanism was developed specifically for use with LQ-570/1070 printer.The compo
REV.-BCHAPTER 2OPERATION PRINCIPLES2.1 OVERVIEW OFPRINTER MECHANISMOPERATION...2-12.1.1 Printhead Mechanism...
REV.-BFigure 2-12. Paper Path for Bottom Entrance Pull Tractor Feed...2-8Figure 2-13.Paper Path for Front Entrance Friction Feed...2-9Figu
REV.-B2.1 OVERVIEW OF PRINTER MECHANISM OPERATIONThis section describes the PRINTER MECHANISM of the Model-5ElOI5E60 printer unit and explainshow the
REV.-B2.1.2 Carriage Movement MechanismA timing belt is connected to the carriage on the lower side. With the printhead installed, this carriagemoves
REV.-B2.1.3 Paper Feed MechanismCut sheet paper is advanced by friction feed. Continuous form paper is advanced using a tractor feedmechanism.There ar
REV.-BNOTES: High-speed draft is valid if the printer status is as follows:●●●●●●●●High-speed draft is selected by DIP switch.Emphasized character mod
REV.-BPush Tractor MethodWhen the push tractor is selected, the SPUR GEAR, 16 engages the SPUR GEAR, 17 (Tractor gear) onthe TRACTOR ASSY. COMBINATION
REV.-BPull Tractor MethodUsing pull tractor feed to advance the paper is basically the same as using push tractor feed. In pushtractor feed, the TRACT
REV.-BThe LEVER, RELEASE switches between friction feed and tractor feed. Setting the LEVER, RELEASE tothe friction feed position presses the paper ad
REV.-BRear entrance paper insertionWhen you feed paper into the printer through the rear entrance, the method to advance the paper canbe: the push tra
REV.-BBottom entrance paper insertionWhen you feed paper into the printer through the bottom entrance,the pull tractor advances the paper.The front pa
REV.-BFront entrance paper insertionWhen you feed paper into the printer through the front entrance, the paper can be advanced eitherwith friction fee
REV.-B2.1.4 Ribbon Advance MechanismThe ribbon drive gear advances the ribbon through a gear linkage. This arrangement of gears makesthe ribbon drive
REV.-B2.2 POWER SUPPLY OPERATIONThe printer can be powered by either of two power supply boards: the 120 V CO62 PSB board or the2201240 V CO62 PSE boa
REV.-ASecond, there are four circuits to protect the supply circuitry and avoid danger. The +5 VDC linecontains a current overload protection circuit
REV.-B2.3 CONTROL CIRCUIT OPERATIONThe control circuit consists of two boards: the C062 MAIN board, which acts as the main board, andthe C062 PNL boar
Table 1-9.REV.-BPrinting (Bit Image Mode)(Pins IBit Image Printing ModeI Density (dpi)} Printable DotsI Printing Speed (ips)8Single-density60480 (*8
REV.-BTable 2-5 lists the functions of the main components and circuits of the printer. The CPU converts theprint data sent from the host computer to
REV.-BTable 2-5. Functions of the Main IC and Circuits (Cont.)IC or CircuitLocation FunctionsSTK-6022B2AThis is a single chip that houses drive circui
REV.-APower OnCPU Self Reset$4+5 V LineVCCON-IDISCuTHLDRESETFigure 2-20. RESET Signal Timing2.3.3 Sensor CircuitsFigure 2-21 shows the sensor circuits
REV.-B2.3.4 MOTOR, CR Drive CircuitIFigure 2-22 shows the MOTOR, CR drive circuit. An open-loop, constant-current drive arrangement isused for running
REV.-BI 2.3.5 MOTOR, PF Drive CircuitThe printer uses a stepping motor to advance the paper. The minimum amount of paper that can beadvanced is l/360
REV.-A2.3.6 Printhead Drive CircuitFigure 2-24 shows the printhead drive circuit in block diagram form. The print data already has beenexpanded to cre
REV.-A2.3.7 Parallel Interface CircuitFigure 2-26 shows the parallel interface circuit in block diagram form. The data sent from the hostcomputer is l
REV.-BCHAPTER 3DISASSEMBLY AND ASSEMBLY3.1 OVERVIEW...3-1
REV.-BLIST OF FIGURESFigure 3-1.Flowchart forDisassemblingthePrinter . . . . . . . . . . . . . . . . . . . . . .3-4Figure 3.2. Removing the Printer Co
REV.-A3.1 OVERVIEWThis section describes the various points to note when disassembling and assembling the printer.3.1.1 Precautions for Disassembling
NOTICE“ All rights reserved. Reproduction of any part of this manual in any fromwhatsoever without SEIKO EPSON’s express written permission is forbidd
REV.-ATable 1-10. Character Matrix and Character SizePrinting ModeI Face Matrix IHDD I Character Size I Unit ESC spHigh-speed draft, 10 pitch7 x 2290
REV.-A3.1.3 Service Checks After RepairWhen printer components are to be sent back to the customer after servicing,use the checklistshown inTable 33 t
REV.-A3.1.4 Specifications for ScrewsIn the following sections, abbreviations are used for small parts, such as screws and washers. Tables3-4 and 3-5
REV.-A3.2 DISASSEMBLY AND ASSEMBLYThis section describes the procedures for disassembling and assembling the main components of theprinter. When the p
REV.-B3.2.1 Changing the Printhead1. Remove the FRAME ASSY., SHEET GUIDE.2. Remove the COVER ASSY., EJECT.FRAME ASSY., SHEET GUIDECOVER ASSY., EJECT(T
REV.-B3.2.2 Removing the Printer CaseThis section describes how to remove the front case and HOUSING ASSY., UPPER.3.2.2.1 Removing the HOUSING, FRONT1
REV.-B3.2.3 Removing the Circuit BoardsThis section describes how to remove the BOARD ASSY., MAIN (CO62 MAIN board), the BOARD ASSY.,POWER SUPPLY (CO6
REV.-BPoint to Note for Assembly and AdjustmentAfter replacing the BOARD ASSY., MAIN, you must adjust the bidirectional print positionagain to ensure
REV.-B3.2.4 Removing the PRINTER MECHANISM1. Remove the HOUSING ASSY., UPPER (see Section 3.2.2.2).2. Remove the CB (M3X6) screws that attach the HOLD
REV.-B3.2.5 Disassembling the PRINTER MECHANISMThis section describes how to disassemble the main components of the PRINTER MECHANISM.3.2.5.1 Removing
REV.-B3.2.5.2 Removing the MOTOR, PF1. Remove the PRINTER MECHANISM from the HOUSING ASSY., LOWER (see Section 3.2.4).2. Remove the COMPRESSION SPRING
REV.-A1234:789101112131415161718192021222324(Typical draft character)LEFTsPAcEAscender area!-Descender areaI.RIGHTsPAcEFace width<9 dots>Charact
REV.-B3.2.5.4 Removing the Carriage1. Remove the FFC (CABLE, HEAD, FRONT (,REAR)) (see Section 3.2.5.3).2. Remove the TIMING BELT from the carriage.3.
REV.-B3.2.5.5 Removing the PLATEN1. Remove the PRINTER MECHANISM from the HOUSING ASSY., LOWER (see Section 3.2.4).2. Remove the two CBP(C) (M3X 10) s
REV.-B3.2.5.6 Removing and Disassembling the FRAME, MAIN, RIGHT1. Remove the PRINTER MECHANISM from the HOUSING ASSY., LOWER (see Section 3.2.4).2. Re
REV.-B3.2.5.7 Removing and Disassembling the PAPER GUIDE (Including the DETECTOR ASSY., HP)1. Remove the PRINTER MECHANISM from the HOUSING ASSY., LOW
REV.-BI3. While holding down the three PF lever assemblies, pull out and remove the release shaft. Remove thePF lever assemblies and the compression s
REV.-B3.2.5.8 Removing the DETECTOR ASSY., HP1. Remove the PRINTER MECHANISM from the HOUSING ASSY., LOWER (see Section 3.2.4).2. Remove the clips fro
REV.-B3.2.5.10 Removing the DETECTOR ASSY., PE, FRONT1. Remove the PRINTER MECHANISM from the HOUSING ASSY., LOWER (see Section 3.2.4).2. Open the cli
REV.-B3.2.5.12 Disassembling the TRACTOR ASSY.1. Remove the TRACTOR ASSY. from the printer.2. Remove the SPUR GEAR, 17 from the SHAFT, TRACTOR.3. Remo
REV.-B3.2.5.13 Arranging the CablesFigure 3-28 shows how the cables are arranged for the PRINTER MECHANISM. When assembling theprinter, make sure that
REV.-BCHAPTER 4ADJUSTMENTS4.1 ADJUSTINGTHE PRINTERMECHANISM...4-14.1.1MOTOR,CRBacklashAdjustment..4-1I...
REV.-A1.3 INTERFACE OVERVIEWThe printer has a parallel interface with the specifications described below.1.3.1 Parallel InterfaceSpecifications for th
REV.-B4.1 ADJUSTING THE PRINTER MECHANISMThis section describes the various adjustments you may need to make to the PRINTER MECHANISM.14.1.1 MOTOR, CR
REV.-B4.1.2 Platen Gap AdjustmentIIf you have rotated or reassembled the SHAFT, CR, GUIDE or the adjusting bushing, or if printing isabnormal, you mus
REV.-B9. Rotate the adjusting bushing until the platen gap is large enough for a thickness gauge of 0.44mm thickness but too narrow for one of 0.47 mm
REV.-B4.2 BIDIRECTIONAL PRINT POSITION ADJUSTMENTThis section describes how to adjust the bidirectional print position to ensure correct printing alig
REV.-AAre the characters aligned vertically? NO -+ GO TO STEP 3.YES - GO TO STEP 4.3. Referring the odd-numbered lines (1st and 3rd), adjust the even-
REV.-B4.3 CIRCUIT ADJUSTMENT1 The BOARD ASSY., MAIN (C062 MAIN BOARD) contains variable resistor VR1, which is used forbalancing the circuitry. When a
REV.-B5.1OVERVIEW...5-15.2 REPAIRBYUNIT REPLACEMENT...
REV.-B5.1 OVERVIEWProblems in the printer may exhibit a variety of symptoms, which can complicate the task oftroubleshooting, unless you follow the pr
REV.-B5.2 REPAIR BY UNIT REPLACEMENTFor most problems, it is sufficient for you to determine the difficulty to the unit level. Refer to Table5-3, iden
REV.-B(1) Printer Fails to Operate when Power is Onfuse Fl on thePower Supply boardfrom the Power Supply board.IYesoutput voltageNo/1 Yesfault correct
Table 1-11. Connector Pin Assignments and Signal Functions (Cont.)Pin No. Signal NameReturnPin No.Dir.Functional Description14 AUTO FEED-XT—INIf LOW w
REV.-B(2) Carriage Operation is AbnormalCN4,CN5,CN6, andCN4,CN5,CN6, andCN7CN7connecting the BOARD ASSY.,connecting the BOARD ASSY.,MAINMAIN and thean
REV.-B(3) Printing is Faulty During Self-Test, but Carriage Operation is NormalSet the head LEVER,G,ADJUST to the 2ndposition, and performself-test.an
REV.-ACheck printheadresistance.YesReplace pluggablechips.YesReplace printhead.Replace printheadand logic PCB.No5-6
REV.-ANoReplace printheadand PH cable.Yes-5<Perform finaltest.5-7
REV.-AX20#40X60X80#6 #lo #18 822 Xc #7 #I9 #it----TEhPi t4 #8 116COM. #21 113 r5( TerminalAssignment >0#l01130#50#70II90#I101130it150#170#190#210#2
REV.-B(4) Paper Feeding is Abnormal (but Printing is Normal)paper loadedcorrectly?Refer to section 5.5,Repair of the PRINTERMECHANISM.Replace the BOAR
REV.-ACheck motor resistance.NoCheck drivers.YesReplace logic PCB.NOTE<Replace defectiveReplace motor andmain logic board.NoChec!< motor resista
REV.-BClean or replace.Check lefl and right tractorassemblies for proper phasing.NoAdjust phasinrw..#...l.rr+ “ImeInspect paperpath.‘4Perform final te
REV.-B(5) Control Panel Operation is AbnormalNofault corrected?Yesself-test executedNo1Replace the BOARD ASSY., MAIN.Ifault corrected?YesReplace the B
REV.-B(6) Printing of Data Sent by the Host Computer is FaultyNOTE: It is assumed here that the host computer is operating normally.STARTPerform self-
REV.-A1.4 CONTROL PANELOn the control panel are: a power button (labeled OPERATE), 7 non-lock type buttons, and 19 indicators.Figure 1-7. Control Pane
REV.-B5.3 REPAIR OF THE MAIN BOARDThis section provides instructions for repairing the BOARD ASSY., MAIN when it is defective anddescribes various sym
ProblemThe printerdoes not op-erate at all.The carriageoperatesabnormally.REV.-BTable 5-4. Repair of a Problem in the BOARD ASSY., MAIN (Cont.)ISympto
REV.-BTable 5-4. Repair of a Problem in the BOARD ASSY., MAIN (Cont.)ProblemSymptomCauseCheckpointSolutionSelf-test print-Self-test is The CPU can’t M
REV.-B5.4 REPAIR OF THE PRINTER MECHANISMFor detailed procedures for replacing or adjusting parts, refer to Chapter 3, Disassembly and Assembly,and Ch
REV.-BTable 5-5. Repair of the PRINTER MECHANISM (Cont.)ProblemSymptomCauseCheckpointSolutionSelf-test printing isA particular dotThe printhead isMeas
REV.-BTable 5-5. Repair of the PRINTER MECHANISM (Cont.)IProblemSymptomCauseCheckpointSolutionThe ribbon feed isThe ribbon is notThe ribbon car-Dismou
REV.-B6.16.2CHAPTER 6MAINTENANCEPREVENTIVEMAINTENANCE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1LUBRICATIONANDADHESIVEAP
REV.-B6.1 PREVENTIVE MAINTENANCEPreventive maintenance includes regular cleaning of the case exterior (using denatured alcohol), as wellas occasional
REV.-ATable 6-2. Lubrication Points (Refer to Figure 6-2)Ref. No.Lubrication Points1l/4 of the perimeter of the top edge of the gear (8.5 mm, 30 mm)2
REV.-A(,\Figure 6-2. LQ-570 Lubrication Points6-3
REV.-A(7) FONT ButtonPressing this button selects a font, and pressing it continuously selects the next one, sequentially. TheFONT LED indicates the c
REV.-B//.Figure 6-3. LQ-1 070 Lubrication Points6-4
REV.-BAPPENDIXA.1 CONNECTOR SUMMARY... A-1A.2 CIRCUIT DIAGRAMS...
REV.-BTable A-1.Board Connector Summary...A-2Table A-2.CN2 BOARD ASSY., MAIN (C062 MAIN)...
REV.-BA.1 CONNECTOR SUMMARYFigure A-l illustrates the interconnection of the primary components. Table A-l summarizes thefunctions and sizes of the co
REV.-BTable A-l. Board Connector SummaryBoardConnectorFunctionPinsBOARD ASSY.,CNlParallel interface36MAIN (CO62 MAIN CN2Optional interface card36BOARD
REV.-BTable A-2. CN2 BOARD ASSY., MAIN (CO62 MAIN)Table A4 CN4 BOARD ASSY., MAIN (CO62 MAIN)INo. I/OSignal Name1-2-3-4-5-6-70809I10-11012013I14I15I160
REV.-BITable A-7. CN7 BOARD ASSY., MAIN (CO62 MAIN)Table A-13. CN13 BOARD ASSY., MAIN (CO62 MAIN)No.I/O Signal NamsFunction10HD3Head data320HDllHead d
. .5 3R<L
REV-BFigure A.3. BOARD ASSY.. MAIN (C062 MAIN BOARD) Circuit DiagramA-6C062 MAIN Board
CN2T,PT-07D5,FMP-‘IZSc2c322ooP22OOP‘T-_ FG2 12.ELF1.90290b-I;Cl:0 22”1-4E---llRI300%b .::’1F,2 5A,125”rRI3RI24 7K2 ‘K1C0622002849
REV.-A1.5 DIP SWITCHES ANDThis section describes the DIP switch1.5.1 DIP Switch SettingsJUMPER SETTINGselections and jumper setting for the LQ-570 pri
CN2I1i630 :c 5f 0 lu/50’I0529AGOliTlR.,R5 --c*:~IOK/2W-- 22wPIH”‘4c”siC5Z2WPC?270”/2OOY,“I--80hrn,25CtLII‘39/w-&-Ddow2KTLP52,-2GB3KI/CO62 PSB Boar
-I-L N’ ’ CNlL-IrI1 ’TT 1C062 PSE Board 2002850
Pb?CNlC062 PSE Board 2002850
CN1RXSO’PIUSE dICO62 PNL Board‘1 Excluding Japan
CO62 MAIN m_------ASSY. 200284700-I+ ’I26c&x L.z” CI,‘12IRI*III!Gc”lhm,r121 CNll21~rb n6,KlA 1CNBCN9 CNIOnLU--MROM BM-256K1',az638-rk C’61112
REV.-Bc61 ----I+ ;L------J--CO62 PSB TM, u$ ’- ----a-m-;cnrCMK-54X1ASSY.2002849 00Figure A-10. BOARD ASSY., POWER SUPPLY (C062 PSB BOARD) Component La
REV.-Bc2C3+I--II-L2a- D8I------- -5“I - t%K-54XT. vASSY 2002850 00Figure A-11. BOARD ASSY., POWER SUPPLY (C062 PSE Board) Component LayoutA-14
;CO62 PNL QW CM-YXT2 DIP 5.~1?sASSY 2002852 00- J3DI. . . . . . . . . . . , . I
?2
REV.-BFigure A-14. LQ-1070 Exploded DiagramA-17
REV.-ATable 1-14. International Character Set Selection1-11-2 1-3CountryPcONON ONUs.437ONONOFFFrance850ONOFF ONGermany860ONOFFOFFU.K.863OFFON ONDenmar
REV.-B/xFigure A-15. Model-5E10 Exploded DiagramA-18
REV.-B\Figure A-16.Model-5E60 Exploded DiagramA-19
Table A-14. Part Number Reference TableRef.No.Description100Lower housing assembly101Bottom shield plate102FFC holding plate103I/F grounding plate104P
Table A-14. Part Number Reference Table (Cont.)Ref.NO.DescrlptlonRef.No.Descrlptlon5675685695705715725735745755765775785795805815825835845855865875885
REV.-AA.5 CASE OUTLINE DRAWING368 mmFigure A-17. LQ-570 Case Outline DrawingA-22
REV.-B151----IFigure A-18. LQ-1070 Case Outline DrawingA-23
Appendix BThe LQ-570+/1070+Differences between the LQ-570+/1070+ and the LQ-570/1070 . . B-1Important Component Differences...B-1Faster
Appendix BTablesTable B-1 Component Compatibility... B-1Table B-2. Print Speed Comparison...B-1Table B-3. Bit Image Pri
Appendix B. The LQ-570+/1070+This appendix describes the LQ-570+/1070+ printer, a small, low-cost printer withadvanced paper-handling features that is
Appendix BFaster Bit Image Print SpeedsTable B-3. Bit Image Print Speed ComparisonBit ImageDensityPrintableLQ-570+/l 070+LQ-57011 070PinsPrinting Mode
REV.-A1.6 OPERATING INSTRUCTIONSThis section describes the self-test and hexadecimal dump functions and also includes the error states,printer initial
Appendix BCharacter Table DifferencesBRASCII and Abicomp added to LQ-570+/1070+Table B-4. DIP Dwitch SW1 DifferencesSWDescription ON OFF1I Ilnternatio
Appendix BJumper DifferencesLQ-570+/1070+When jumper 512 is connected to SLIN, the printer recognizes the SELECT INsignal Corn the host.LQ-570/1070Whe
Appendix BC107 MAIN Board Component LayoutSTK6712 (IClO) -E05A50 (ICll)\CPU TMPQOCO41 (IC21)I (IMASK ROM (ICPROM (IC14)EO5A66 (IC2)Figure B-l.Cl07 MAI
Appendix BLQ-570+/1070+ Control Circuit OperationThe control circuitry consists of two boards: the Cl07 MAIN board and theCO62 PNL board (the control
Appendix BTable B-8 lists the functions of the main components and circuits of the printer.TheCPU converts the print data sent from the host computer
Appendrx BIC or CircuitTMP90C411 we U-O.1’ U.eb.C”.ea “, ,Icc: I.IUC#C 1v U.W UC, ~-UC,0LocationFunctionsIC21Receives data from the host computer and
Appendix BReset CircuitFigure B-4 shows a block diagram for the reset circuit, which issues the /BESETsignal to initialize each part of the control ci
Appendix BPower OnCPU Self Resettt+5 V Line1THLDFigure &5.Timing of Reset SignalB-10 Epson LQ-570+/1 070+
Appendix BSensor CircuitsFigure B-6 shows a block diagram for the sensor circuits. Detection of any excessiveprinthead temperature causes the TEMP2 si
Appendix BCR Motor Drive CircuitFigure B-7 shows the CR motor drive circuit, which uses an open-loop, constant-current drive control to drive the CR m
REV.-A1.6.3 Paper-out Detection and Forms Override FunctionWhen the paper-out detector, attached to the printer mechanism, detects a paper-end, the pr
Appendix BPF Motor Drive CircuitThe stepping motor that the printer uses to advance the paper can advance it by aminimum of 1/360 inch. The motor is a
Appendix i3Printhead Drive CircuitFigure B-9 shows the printhead drive circuit block diagram. The print data alreadyis expanded to create the image da
Appendix BDisassembly Procedures Unique to the LQ-570+/1070+For the most part, disassembly of the LQ-570+/1070+ is the same as for the LQ-570/1070. F
Appendix BCBB(C) (M3 X 10) ScrewsCB (M3 X B)‘ScrewMain B&d Asembh/Figum B-11. Main Boa&AssemblyADJUSTMEWI’ REQUIREDAfter you have replaced the
Appendix BRemoving the C062 PSB Power Supply Board Assembly1.Remove the upper housing assembly. (See Section 3.2.2.2.)2.Remove the cable from connect
Appendix BRemoving the C062 PNL Board1.Remove the front housing. (See Section 3.2.2.1.)2.Remove the 5 CBB(C) (M3 x 10) screws that hold the panel boar
Appends: BAdjustmentsThe adjustments for the LQ-570+/1070+ are the same as those for the LQ-570/1070,with the exception of the circuit adjustment des
Appendix BTroubleshootingThe tables below provide the test points you ca.u use to check the motors, printhead,and drivers for the LQ-570+/107&.I-C
Appendix BDriverPrintheadIC4 - IC9(STA475A)1 W1t! D-l&.ut-sver 1 ea. 1 “ClCCITerstTestTest MethodPoint 1Point 2(Power off. Set Meter to Diodes)Rea
Appendix BThe figure below shows how printhead connector pins are assigned to the dot wiresin the printhead.@@@@<@@I@@0TEWl (418 116 -&ik: II21
REV.-APRECAUTIONSPrecautionary notations throughout the text are categorized relative to 1) personal injury, and 2) damageto equipment:DANGERSignals a
REV.-A(a) Initializes printer mechanism.(b) Clears input data buffer.(c) Clears downloaded character set.(d) Clears print buffer.(e) Returns printer s
Appendix BReference MaterialsThis section contains tables, diagrams, and schematics specific to the LQ-570+/1070+. The figure below is a connection di
Appendix BBoardPanel Board AssemblyCNlControl panel input to main board12Power Supply BoardCNlAC power input2AssemblyCN2DC power input11Cl 07 MAIN Boa
Appendrx SPin No. l/OTable B-14. Cl 07 MAIN Board - CNZSignal NameFunction,1~ a56i ;:I9I101112131415161718192021222324252627282930313233343536------00
Appendix BPin No.UO1 -be xl-Ail.b1”* I.-L. Ucma.U - u4.0Signal NameFunction1I/PAUSEPAUSE button2-/READYFixed to GND30TXSTransmit signal (LED)40 ILDLED
Appendix BPin No.1234567891011121314151617Pin No.123456789101112131415It0000000---000000I-l/O00000---0000000Table B-18.Cl07 M.MN BSignal Nameard - CN6
Appendix BPin No. l/OTable R21.Cl07 MAIN Board - CN9Signal NameFunction1IPE2Rear PE sensor2-GNDSignal groundPin No. II0Table R22.Cl07 MAIN Board - CNl
Appendix BFigure B-16.Cl07 iMX.lN Board Component LayoutEpson LQ-570+/1 070+B-29
Appendix Brlrwo,r I-----------7mp ,h. re1.101 OP” lW Lawo.L------ ------- _:Figure B-l 7.Cl07 MAIN Board Circuit DiagramEpson LQ-570+/1 070+B-31
REV.-AAutomatic cut-sheet loading and ejection with cut-sheet feederMove the release lever to the friction-feed position, and place the sheets into
REV.-BShort-tear-offTo access the short-tear-off function, press the TEAR-OFF button. The release lever must be in the tractorposition. The paper adva
REV.-A1.6.11 Printer Protection for Heavy-Duty PrintingThis printer has a printhead protection function to prevent it from overheating and to protect
REV.-B1.7 MAIN COMPONENTSIIThe main components of the LQ-570/l 070 printers are designedto maintain and repair the printer. The main components are:fo
REV.-B1.7.2 C062 PNL Board (Control Panel Circuit Board)The C062 PNL board is the LQ-570\1070 control panel, which includes the indicator LEDs, switch
IIREV.-B1.7.4 Printer Mechanism (M-5 E10/M-5E60)The M-5E 10/M-5E60 printer mechanism was developed specifically for use with LQ-570/l 070 printer.Th
REV.-B2.12.22.3CHAPTER 2OPERATION PRINCIPLESOVERVIEW OF PRINTER MECHANISM OPERATION . . . . . . . . . . . . . . . 2-12.1.1 Printhead Mechanism. . . .
REV.-BFigure 2-12. Paper Path for Bottom Entrance Pull Tractor Feed... 2-8Figure 2-13. Paper Path for Front Entrance Friction Feed. . . . . . . . . .
REV.-B2.1 OVERVIEW OF PRINTER MECHANISM OPERATIONThis section describes the PRINTER MECHANISM of the Model-5E 10\5E60 printer unit and explainshow the
REV.-BPREFACEThis manual describes functions, theory of electrical and mechanicaloperations, maintenance, and repair of the LQ-570/l 070.The instructi
REV.-B2.1.2 Carriage Movement MechanismA timing belt is connected to the carriage on the lower side. With the printhead installed, this carriagemove
REV.-B2.1.3 Paper Feed MechanismCut sheet paper is advanced by friction feed. Continuous form paper is advanced using a tractor feedmechanism.There
REV.-BIIPush Tractor MethodWhen the push tractor is selected, the SPUR GEAR, 16 engages the SPUR GEAR, 17 (Tractor gear) onthe TRACTOR ASSY. COMBINA
REV.-BPull Tractor MethodUsing pull tractor feed to advance the paper is basically the same as using push tractor feed. In pushtractor feed, the TRA
IREV.-BThe LEVER, RELEASE switches between friction feed and tractor feed. Setting the LEVER, RELEASE tothe friction feed position presses the paper a
REV.-BRear entrance paper insertionWhen you feed paper into the printer through the rear entrance, the method to advancebe: the push tractor, or the p
REV.-BBottom entrance paper insertionWhen you feed paper into the printer through the bottom entrance, the pull tractor advances the paper.The front p
REV.-BFront entrance paper insertionWhen you feed paper into the printer through the front entrance, the paper can be advanced eitherwith friction fee
REV.-B2.1.4 Ribbon Advance MechanismThe ribbon drive gear advances the ribbon through a gear linkage. This arrangement of gears makesthe ribbon drive
REV.-B2.2 POWER SUPPLY OPERATIONThe printer can be powered by either of two power supply boards: the 120 V C062 PSB board or the220/240 V C062 PSE bo
REVISION SHEETREVISONDATE ISSUEDCHANGE DOCUMENTAJune 20, 1991 1st issueBSept. 6, 1991Added information for the LQ-1 070:l-i, l-ii, 1-1 - 1-8, 1-10, 1-
REV.-ASecond, there are four circuits to protect the supply circuitry and avoid danger. The +5 VDC linecontains a current overload protection circuit
REV.-B2.3 CONTROL CIRCUIT OPERATIONThe control circuit consists of two boards: the C062 MAIN board, which acts as the main board, andthe C062 PNL boar
IREV.-BTable 2-5 lists the functions of the main components and circuits of the printer. The CPU converts theprint data sent from the host computer to
REV.-BTable 2-5. Functions of the Main IC and Circuits (Cont.)IC or CircuitLocationFunctionsSTK-6022B2AThis is a single chip that houses drive circuit
REV.-APower OnCPU Self ResetIi+5 V Line -VmmlFigure 2-20. RESET Signal Timing2.3.3 Sensor CircuitsFigure 2-21 shows the sensor circuits in block diagr
REV.-B2.3.4 MOTOR, CR Drive CircuitFigure 2-22 shows the MOTOR, CR drive circuit. An open-loop, constant-current drive arrangement isused for runnin
IIIREV.-B2.3.5 MOTOR, PF Drive CircuitThe printer uses a stepping motor to advance the paper. The minimum amount of paper that can beadvanced is 1/360
REV.-A2.3.6 Printhead Drive CircuitFigure 2-24 shows the printhead drive circuit in block diagram form. The print data already has beenexpanded to c
REV.-A2.3.6 Printhead Drive CircuitFigure 2-24 shows the printhead drive circuit in block diagram form. The print data already has beenexpanded to cr
REV.-BCHAPTER 3DISASSEMBLY AND ASSEMBLY3.1 OVERVIEW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
REV.-ATABLE OF CONTENTSCHAPTER 1.GENERAL DESCRIPTIONCHAPTER 2.OPERATION PRINCIPLESCHAPTER 3.DISASSEMBLY AND ASSEMBLYCHAPTER 4.ADJUSTMENTSCHAPTER 5.TRO
REV.-BFigure 3-1.Figure 3-2.Figure 3-3.Figure 3-4.Figure 3-5.Figure 3-6.Figure 3-7.Figure 3-8.Figure 3-9.Figure 3-10.Figure 3-11.Figure 3-12.Figure 3-
REV.-A3.1 OVERVIEWThis section describes the various points to note when disassembling and assembling the printer.3.1.1 Precautions for Disassembling
REV.-A3.1.3 Service Checks After RepairWhen printer components are to be sent back to the customer after servicing, first use the checklistshown in Ta
REV.-A3.1.4 Specifications for ScrewsIn the following sections, abbreviations are used for small parts, such as screws and washers. Tables3-4 and 3-5
REV.-A3.2 DISASSEMBLY AND ASSEMBLYThis section describes the procedures for disassembling and assembling the main componentsof theprinter. When the pr
REV.-B3.2.1 Changing the Printhead1. Remove the FRAME ASSY., SHEET GUIDE.2. Remove the COVER ASSY., EJECT.HEET GUIDEASSY., EJECT“(This illustration s
REV.-B3.2.2 Removing the Printer CaseThis section describes how to remove the front case and HOUSING ASSY., UPPER.3.2.2.1 Removing the HOUING, FRONT
REV.-B3.2.3 Removing the Circuit BoardsThis section describes how to remove the BOARD ASSY., MAIN (C062 MAIN board), the BOARD ASSY.,POWER SUPPLY (C0
REV.-BIPoint to Note for Assembly and AdjustmentAfter replacing the BOARD ASSY., MAIN, you must adjust the bidirectional print positionagain to ensure
REV.-B3.2.4 Removing the PRINTER MECHANISM1. Remove the HOUSING ASSY., UPPER (see Section 3.2.2.2).2. Remove the CB (M3X 6) screws that attach the HOL
REV.-B1.11.21.31.41.51.61.7CHAPTER 1GENERAL DESCRIPTIONFEATURES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
IREV.-B3.2.5 Disassembling the PRINTER MECHANISMThis section describes how to disassemble the main components of the PRINTER MECHANISM.3.2.5.1 Removi
REV.-B3.2.5.2 Removing the MOTOR, PF1. Remove the PRINTER MECHANISM from the HOUSING ASSY., LOWER(see Section 3.2.4).2. Remove the COMPRESSION SPRING,
REV.-B3.2.5.4 Removing the Carriage1.2.3.4.Remove the FFC (CABLE, HEAD, FRONT(,REAR)) (see Section 3.2.5.3).Remove the TIMING BELT from the carriage.U
REV.-B3.2.5.5 Removing the PLATEN1.2.3.4.5.6.7.Remove the PRINTER MECHANISM from the HOUSING ASSY., LOWER (see Section 3.2.4).Remove the two CBP(C) (M
REV.-B3.2.5.6 Removing and Disassembling the FRAME, MAIN, RIGHT1. Remove the PRINTER MECHANISM from the HOUSING ASSY., LOWER (see Section 3.2.4).2.3.4
REV.-B3.2.5.7 Removing and Disassembling the PAPER GUIDE (Including the DETECTOR ASSY., HP)1. Remove the PRINTER MECHANISM from the HOUSING ASSY., LO
REV.-B9. While holding down the three LEVER ASSY., PF, pull out and remove the SHAFT, RELEASE Removethe LEVER ASSY., PF and the COMPRESSION SPRING, 13
REV.-B3.2.5.8 Removing the DETECTOR ASSY., HP1. Remove the PRINTER MECHANISM from the HOUSING ASSY., LOWER (see Section 3,2.4).2, Remove the clips f
IIIREV.-B3.2.5.10 Removing the DETECTOR ASSY., PE, FRONT1. Remove the PRINTER MECHANISM from the HOUSING ASSY., LOWER (see Section 3.2.4).2. Open th
REV.-B3.2.5.12 Disassembling the TRACTOR ASSY.1.2.3.4.5.Remove the TRACTOR ASSY. from the printer.Remove the SPUR GEAR, 17 from the SHAFT, TRACTOR.Re
REV.-BLIST OF FIGURESFigure 1-1.Figure 1-2.Figure 1-3.Figure 1-4.Figure 1-5.Figure 1-6.Figure 1-7.Figure 1-8.Figure 1-9.Figure l-10.Figure 1-11.Figure
REV.-B3.2.5.13 Arranging the CablesI Figure 3-28 shows how the cables are arranged for the PRINTER MECHANISM. When assembling theprinter, make sure th
REV.-BCHAPTER 4ADJUSTMENTS4.1 ADJUSTING THE PRINTER MECHANISM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-14.1.1 MOT
REV.-B4.1 ADJUSTING THE PRINTER MECHANISMThis section describes the various adjustments you may need to make to the PRINTER MECHANISM. I4.1.1 MOTOR, C
IIIIIREV.-B4.1.2 Platen Gap AdjustmentIf you have rotated or reassembled the SHAFT, CR, GUIDE or the adjusting bushing, or if printing isabnormal, you
9.10.11.12.13.14.15.REV.-HRotate the adjusting bushing until the platen gap is large enough for a thickness gauge of 0.44mm thickness but too narrow
REV.-B4.2 BIDIRECTIONAL PRINT POSITION ADJUSTMENTThis section describes how to adjust the bidirectional print position to ensure correct printing alig
REV.-AAre the characters aligned vertically?NO ~ GO TO STEp 30YES ~ GO TO STEP 4.3. Referring the odd-numbered lines (Ist and 3rd), adjust the even-n
REV.-B4.3 CIRCUIT ADJUSTMENTI The BOARD ASSY.,MAIN (C062 MAIN BOARD) contains variable resistor VR1, which is used forbalancing the circuitry. When
REV.-B5.15.25.35.4CHAPTER 5TROUBLESHOOTINGOVERVIEW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1 OVERVIEWProblems in the printer may exhibit a variety oftroubleshooting,symptoms,unless you follow the procedure shown in theSTART5.2 5-2Repair by
REV.-B1.1 FEATURESThe LQ-570/l 070 are small, light-weight, low-cost, printers with advanced paper handling that iscompatible with the LQ-5 10/550/101
REV.-B5.2 REPAIR BY UNIT REPLACEMENTFor most problems, it is sufficient for you to determine the difficulty to the unit level. Refer to Table5-3, iden
REV.-B(1) Printer Fails to Operate when Power is OnSTARTIUse correct ACinput voltage.Replace the fuSeand disconnect:~;:don the mainNois turned ON agai
REV.-B(2) Carriage Operation is AbnormalCN 12,CN8,CN9,CN 10,CN4,CN5,CN6, and CN7connecting the BOARD ASSY.,MAIN and the PRINTERMECHANISM insertedSecur
REV.-BPrinting is Faulty During Self-Test, but Carriage Operation is Normal(STARTSet the head LEVER,G,ADJUST to the 2ndposition, and perform>and C
Check printheadresistance.YesReplace pluggablechips.YesReplace printhead.Replace printheadand logic PCB.YesNoNoReplace logic PCB.
QDICheck printheadresistance again.ITIReplace printhead.Replace printhead+cable./ \k1I1Perform finaltest.
REV.-A#20#40#60#80TEMP2 #20 tl12 #24@ @ @ Q/’@\g g &@ @ @ @{@@@@~--—.TEMP1 *4 # 8 #16cOM. H 21 tIi3 #5< Terminal Assignment )o0::o#5o#7o#9o#11
(4) Paper Feeding is Abnormal (but Printing is Normal)START<NoLoad the paper correctly.i6Aplaten knob rotatemanually with powerRefer to seCtiOn 5.5
REV.-ANoYes1Replace logic PCB.Replace defectivem oto r.NOTE<NOTEnBCheck motor resistance.Perform finaltest.NoReplace motor and1/0 cable.ENDNOTERepl
1Inspect gears for damageor debris.3Clean or replace.Check left and right tractorNoYesassembly for proper phasing.<.Adjust phasing or replacewsproc
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