Epson C82305/06 (Serial I/F) Specifications

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