Epson C82305 Manual de Serviço

EPSONEPSON TERMINAL PRINTERFX-870/1170SERVICE MANUAL4001461REV.-A

REV.-A1.1 ScopeThese specifications apply to the EPSON FX-87WI 170 dot matrix Printer.1.1.1 Features● Upward compatibility with the FX-850(+)/1050(+),

REV.-ACHAPTER 4ADJUSTMENTS4.1 Adjusting the Printer Mechanism. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

REV.-A4.1 Adjusting the Printer MechanismThis section describes the various adjustments required to keep the printer mechanism in optimum condition.4.

REV.-Af:,”. . . . . .,LEVER, G, ADJUST\Figure 4-1. PARALLEUSM ADJUSTMENT BUSHING4.2 Bidirectional Alignment AdjustmentThis section describes how to ad

REV.-A4.2.2 Bidirectional Alignment Adjustment ProcedureThe FX-870/l 170 provides bidirectional alignment adjustment pro9ram. When YOU load PaPer and

REV.-ACHAPTER 5TROUBLESHOOTING5.1 Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

REV.-A5.1 OverviewThe FX-870/l 170 may exhibit different symptoms for the same problem. This makes troubleshooting difficult.This section provides sim

REV.-A#1 o#2 #6#4 TEMP1 TEMPZ #3 #7#2 o#3 o#4 o#5 o#6 O#7 o#8 O#9 oIWIRE ASSIGNMENTCoil Resistance :16.5 * 1.6Q at 25°C(Bemeen each dot wire and comm

REV.-ATable 5-2. Error IndicationError WarningErrorCauseBuzzer beeps:An error has occurred with*** ***the carriage position.Buzzer beeps:Memory error.

REV.-A5.2 Repair by UnitReplacementMost printer problems can be corrected by replacing the defective unit. First, identifi the problem from thesympt

REV.-AFlowchart (1) abnormal operation at power onWARNINGDo not touch the heat sink attached to the FET (Ql) when the printer is powered.If you touch

REV.-A.4%~.-80-column model136-column modelFigure 1-1. External View of the FX-870/1170r~... . .“. ,.1-2

REV.-AFlowchart (2) carriage operation abnormalSTARTCN3, 4, 5, 6, 7, 8, 9, and 13connecting the BOARD ASSY., C094 MAISecure the connectors.and the pri

REV.-AFlowhart (3) self test printing abnormalSTART&Set the platen gap adjust lever to O and perform the selftest. (To start the self test, turn o

REV.-AFlowchart (4) paper feeding abnormal(==)c“Load the paper correctly.Insert connectorCN6 correctly.coil resistance correct(63 ohms +/- 3 at roomRe

REV.-AFlowchati (5) control panel operation abnormalCN12 connecting the BOARDASSY., C094 PNL and the BOARDInsert connectorASSY., C094 MAIN insertedCN

REV.-AFlowchart (6) incorrect printing of data sent from host computerNote: The host computer is assumed to be operating normally.START1Perform the se

5.3 Repairing the Board Assembly, C076 PSB/PSEThis section provides instructions for repairing the BOARD ASSEMBLY,REV.-AC076 PSB/PSE. It describes va

Table 5-4. Repairing the BOARD ASSEMBLY, C076 PSB/PSE (Continued)ProblemThe voltage of the+35 V line is belowthespecifiedvalue.CauseQ3, ICI, Pcl, PC2Q

REV.-ATable 5-4. Repairing the BOARD ASSEMBLY, C076 PSB/PSE (Continued)Problemrhe+5Vlineisdead.Causerhe +35 V line is~ead.C51 is dead.251 or Q52 isiea

REV.-A5.4 Repairing the Board Assembly, C094 MAINThis section provides instructions for repairing the BOARD ASSEMBLY, C094 MAIN. It describes various

REV.-ATable 5-5. Repairing the BOARD ASSEMBLY, C094 MAIN (Continued)ProblemSymptomCauseCheckpointSolution~bnormalThe CPUThe CPU isCheck the oscillator

REV.-A1.1.2 OptionsC806371 (U.S. version)C806372 (other)C806391 (U.S. version)C806392 (other)C806381 (U.S. version)C806382 (other)C806401 (U.S. versi

REV.-ATable 5-5. Repairing the BOARD ASSEMBLY, C094 MAIN (Continued)ProblemSymptomCauseCheckpointSolutionSelf testThe printerIC4 isCheck the head puls

Table 5-5. Repairing the BOARD ASSEMBLY, C094 MAIN (Continued)ProblemSymptomCauseCheckpointSolution~aper feedThe printerICI isCheck the input signal (

REV.-A5.5 Repairing the PrinterThis section provides instructionsMechanismfor repairing theprinter mechanism. It describes various problems,symptoms,

REV.-ATable 5-6. Repairing the Printer Mechanism (Continued)ProblemsymptomCauseCheckpointSolutionSelf test printingThe carriageThe common wiresCheck t

REV.-AProblemRibbon feedabnormality.The paper getsstained with ink.DETECTOR, PEmalfunction.Table 5-6. Repairing the Printer Mechanism (Continued)sympt

REV.-A6.16.2CHAPTER 6MAINTENANCEPreventive Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

REV.-A6.1 Preventive MaintenancePreventive maintenance involves occasionally vacuuming the printer mechanism to remove dust and paperdebris and regula

REV.-ATable 6-2. Lubrication PointsRef. No. Lubrication PointsLubricant1Platen gap adjustment slots on the LE~ FRAMEG-26(excluding the two slots at th

REV.-AFigure 6-1. Lubrication Points6-3

REV.-AAPPENDIXA.1 Connector Summary . . . ... . . . . . . . . . . . . . . . . . . . . . . . ...A-lA.2 Circuit Diagrams . . .

REV.-A1.2 Specifications1.2.1 Hardware Specifications1.2.1.1 Printing MethodPrinting method:Impact dot matrixPin configuration: 9 wires(diameter 0.29

REV.-AA.1 Connector SummaryFigure A-1 illustrates the interconnection of the primary components.Table A-1 summarizes the functionsand sizes of the con

REV.-ATable A-1. C094 MAIN Board Connector SummaryBoardConnectorFunctionPinsBOARD ASSEMBLY,CN1Host Computer36C094 MAINCN2Optional Interface36CN3DETECT

REV.-ASee Table 1-14 for CNI (Centronics interface).Table A-2. CN2 (BOARD ASSEMBLY, C094 MAIN)No.1/0Signal NameFunction1-+5+5 VDC2-+5 +5 VDC3-+5 +5 VD

REV.-ATable A-8. CN8 (BOARD ASSEMBLY, C094 MAINI—No—1234557331011121314—oHD2oC246oHD6oHD8oHD4oHD9ITMPoC789o TMPIoHDIoHD3oHD5oHD7oC135FunctionHead Data

d4r’+/\I‘=m.0C2 c.O-*EN--lI,t/:>J.-1 :IImI‘ I kI1_?... . . . . . . . . . . . . . . . . . . . . . . . . . ...:-,,,mu)*Figure A-4, BOARD ASSEMBLY, C0

EPSON

REV.-ATable 1-1. Line Feed Speed (1 iine = 1/6”)Intermittent feedContinuous feedType of paperThinThickThinThickmsmsms (ips)ms (ips)Fanfold paper778555

REV.-A3) Pull tractor feed● Set the release lever to the PULL position.● Load the paper from the front, rear, or bottom entrance.(The front or bottom

REV.-A- . . - . - .,. . . , n- -A -,- - —A— ,-— ..L . -. m . —— R- --– m, -— A,.- — m- —--i1 ame 1-s. specmcawons lor uu~ mee~s [eamomess uupncamn

REV.-ATable 1-6. Specifications for Labels.C.“:%t.SizeThicknessQuality2 1/2” X 15/16”4“ X 15/16”4“ X 17/16”0.07-0.09 mm (0.0028-0.0031”) - base paper0

REV.-A1.2.1.4 Printable Area1) Cut sheetstop insertion148-257 mm (5.8-10.1”): 80 columns148-420 mm (5.8-16.5”) : 136 columnsfront insertion182-257 mm

REV.-A2) Continuous paper<>*1*1,A.Printable Area<L\itABCDI_WXYZ4--ABCD4WXYZFigure 1-4. Printable Area for Continuous Paper*1 13 mm (0.51”) or

.-.. .&{’”’-.. ,NOTICE“ All rights reserved. Reproduction of any part of this manual in any fromwhatsoever without SEIKO EPSON’s express written p

REV.-A3) Roll paper (80-column model only)top insertion216 +/- 3 mm (8.5 +/- 0.12”)k101-254 mm (4-10”): 80 columns101-406 mm (4-16”): 136 columns>●

REV.-A1.2.1.6 Electrical SpecificationsSee Table 1-8 and 1-9.Table 1-8. Electrical Specifications for 120V ModelRated voltage120 VACInput voltage rang

REV.-A1.2.1.8 ReliabilityMCBF5 million lines (excluding a printhead)(MCBF: Mean Cycles Between Failures)MTBF (expected value)4000 power on hours (duty

REV.-ATable 1-11. Character Size and Pitch.f’:. .,’;:.,.-Notes: 1)2)3)4)IType of letters I Width I Height I Character pitch[mm][mm][mm]Pica2.13.12.54

REV.-A, 1.3 InterfaceThis printer has a built-in, 8-bit centronics parallel interface.1.3.1 Parallel InterfaceData transmission mode8-bit parallelSync

REV.-A(Continued)SignalReturnSignalDir.Pin No.Pin No.DescriptionName1028ACKNLGoutApprox.12 us pulse. LOW indicates that data has beenreceived and that

REV.-A, 1.3.2 Optional InterfaceThe following interface cards can be used for this printer.Table 1-15. Optional InterfaceCatalog #TypeC82305* (inch sc

.(-,:.,.REV.-A1.4.2 Buttons[PAUSEISelects printing or pause alternately when there is some data to print in the input buffer.Advances continuous paper

REV.-AAdvances the paper forward by 1/108 inch per step.IFONTl+[pApER FEEDIMoves the paper backward by 1/108 inch per step.Pressing FONT along with PA

REV.-A1.5 Functions1.5.1 Default SettingsUsers can set certain default parameters, which will be used at printer initialization.To change the paramete

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

REV.-AI ault$ I - Iu. -g uup m rcacul caFONTCOND.FeatureSettingREADYLEDLEDLEDOFFONEmulationESC/POFFIBM ProprinterONOFF BLINKSCharacter pitchPica OFFE

REV.-ATable 17. Group 2 Features (ESC/P Mode)FONTCOND.READYCG tableLEDILEDILEDONItalicU. S. A.(std. setting)BLINKSFranceOFFGermanyI OFF I ONOFFONOFFON

REV.-A1.5.2 Power On Default SettingsThe printer also lets you change some of its power on parameters. To change the settings shown in Table 1-19, Gro

REV.-A1.5.5 Self TestPress the PAPER FEED button while turning on the printer to put the printer in self-test mode. To stop the selftest, turn off the

REV.-A, 1.5.10 Sheet Loading and Sheet EjectionThe release lever engages or disengages the push-tractor unit drive mechanism. The lever’s operationpro

REV.-APosition 1 (3rd step)$\\. .-=.&’”r’Platen Gap Adjust LeverQFigure 1-10. Lever Positions1.5.12 Printer InitializationThe printer is initiali

REV.-A1.5.13 BuzzerThe buzzer beeps for 0.1 second at a time. These beep sounds a recombined in various ways, as shown below,to indicate different mea

.REV.-A1.6 Main Componentsf’.::,\.The components of the FX-870/l 170 are designed for easy removal and replacement during maintenanceand repair.The m

REV.-Aq.6.I BOARD ASSEMBLY, C094 MAIN (Main Control Circuit Board)Basically, the same board layout is used in both the 136-column model and the 80-co

.REV.-A1.6.2 BOARD ASSEMBLY, C094 PNL (Control Panel Circuit Board)K’.*“This board functions as the control panel of the FX-870/l 170, and consists of

REV.-APREFACEThis manual describes functions, theory of electrical and mechanicaloperations, maintenance, and repair of the FX-870/l 170.The instructi

REV.-A1.6.4 Printer MechanismThe printer mechanism consists of a 9-pin impact dot head, a carriage mechanism, a carriage motor, a paPerfeed mechanism,

.REV.-A1.6.5 Housing AssemblyThe printer mechanism and all the boards are contained in a housing assembly that consists of the uppercaseand the lower

REV.-A2.1 Printer2.1.12.1.22.1.32.1.42.1.42.2 Power2.2.12.2.2CHAPTER 2OPERATION PRINCIPLESMechanism Operation. . . . . . . . . . . . . . . . . . . . .

REV.-ALIST OF FIGURES.c’.’%.Figure 2-l. Howthe Printhead Works .~.--...-..-.. ...2-2Figure 2-2. Carriage Operation . . .

REV.-A2.1 Printer Mechanism OperationThis section describes the printer mechanism of the FX-870/l 170 printer and explains how the printer works.The F

REV.-AFigure 2-1 shows the action of the printer mechanism when a single dot is printed.PlatenWire Resetting SpringStopper\ \Dot WireRibbon Mask)b.ctu

REV.-A‘ 2.1.2 Carriage MechanismThe timing belt is connected to the lower side of the carriage. With the printhead installed, the carriage movesin eit

.REV.-A2.1.3 Platen Gap Adjustment&>.,Theplatengap (the gap between the platen andtheprinthead) can beadjustedto allowthe printerto use pape

REV.-AI2.1.4 Paper Handling MechanismsDuring normal operation, the paper is fed to the printer, advanced to the specified position, and ejected fromth

.REV.-A2.1.4.2 Paper Advance Mechanisms6,>This section describes how the friction advance and tractor advance mechanisms work to advance the PaPer

.f,. :;::\. .REVISION SHEETREVISONDATE ISSUEDCHANGE DOCUMENTAJune 15, 19921st issue(“ ‘?:* .7,,-v–

REV.-A(2) push Tractor MethodWhen the push tractor method is used with the rear entrance, the torque generated by the PF motor istransmitted to the pu

REV.-APaper (Continuous)&\ \ /RollerGe~~t-\Motor,Paper AdvanceReduction GearDrive Roller GearPF/Push Tractor\Push Tractor GearFigure 2-6. Push Tra

REV.-A(3) pull Tractor MethodThe pull tractor advances paper in basically the same way as the push tractor. The push tractor is installedat the paper

REV.-A(4) push-pull Tractor MethodcA,: .’The push-pull tractor method is a combination of the push and pull tractor methods. Two tractors are usedto a

REV.-APaper (Continuous),Paper Drive Roller\/Pull TractorJPull Tractor Gear\A Tractor Reduction Gear\,.’<~..\—//1 PF Motor Pinion Gear\\Motor, PF@

REV.-A(5) Release Levero.;.-The release lever is used to select friction or tractor feeding or release the paper. When the release lever isset to the

REV.-A2.1.4.3 Paper PathsThis section describes the various paths the paper follows through the printer mechanism. The various paperpaths are divided

.REV.-A(2) Rear entrance~~:.,Figures 2-13 and 2-14 show the paper paths fortractorfeeding using the rear entrance. The rear entrance canbe used with a

REV.-APaper (ContinuPrintheadctorear)Paper Guide RollersFigure 2-15. Paper Path for Push-pull Tractor Feeding Using the Rear Entrance(3) Bottom entran

.REV.-A(4) Front entrancec~:>1-..Figures 2-17 through 2-20 show the paper paths for the front entrance. The front entrance can be used withany of t

REV.-ATABLE OF CONTENTSCHAPTER 1.GENERAL DESCRIPTIONCHAPTER 2.OPERATING PRINCIPLESCHAPTER 3. DISASSEMBLY AND ASSEMBLYCHAPTER 4. ADJUSTMENTSCHAPTER 5.T

REV.-APaper (Continuous)Paper Drive Roller. .Detector, PE (Front) \Lower Paper Guide RollerFigure 2-19. Paper Path for Pull Tractor Feeding Using the

.REV.-A2.1.4 Ribbon Advance MechanismcThe ribbon is held between the ribbon advance roller (ribbon driving gear) and the ribbon pressure roller. ‘“”i.

REV.-A2.2 Power Supply OperationThe FX-870/l 170 printer is powered by either of the two power supply boards: 120 VAC power supply board(BOARD ASSEMBL

REV.-A2.2.2 Power Supply Circuit OperationFigure 2-22 shows the power supply circuitry in block diagram form. When AC power enters the printer froman

REV.-AIIPrimaryII1I1Secondary1I1Full WaveRectification— SmoothingSwitching;Smoothing<CircuitCircuitCircuitICircuitI11m9Filter CircuitAC inputI11I11

REV.-A2.3 Control Circuit OperationThe control circuit consists of two circuit boards: the C094 MAIN (the main control circuit board) and the C094PNL

REV.-AFigure 2-24 shows the data flow from the host computer to the printhead. Data sent from the host computeris converted to image data and transmit

.REV.-ATable 2-4 lists the functions of the main components of the C094 MAIN.Table 2-5. Functions of Main Components of C094 MAINIC or CircuitFunction

REV.-A2.3.2 Reset CircuitThe control circuits are initialized when the RESET signal is issued. The reset operation occurs under thesetwo conditions:(1

.REV.-A2.3.3 Sensor Circuits(.>~The FX-870/l 170 printer has the following sensors: CRHOME, pE (FRONT), pE (REAR), pG (platen 9ap),RELEASE LEVER,

REV.-ACHAPTER 1GENERAL DESCRIPTION1.1 Scope. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

REV.-A2.3.4 Carriage Motor Drive CircuitThe carriage motor drive circuit controls the CR motor. An open loop, constant current drive arrangement runst

.REV.-A2.3.5 Paper Feed Motor Drive Circuit{:%The PF motor (a stepping motor) is used to advance the paper. The minimum advance rate is 1/216 inch. Th

REV.-A2.3.6 Printhead Drive CircuitThe printhead drive circuit receives two types of signals; image data and the pulse length control signal.Image dat

.REV.-A2.3.8 E2PROM Control Circuitc’“4Figure 2-31 shows the E2PROM control circuit. The E2PROM is non-volatile memory containing information . .such

REV.-ACHAPTER 3DISASSEMBLY AND ASSEMBLY3.1 Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

REV.-ALIST OF FIGURESFigure 3-1. Flowchart for Disassembling the Printer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

REV.-A,3.1 OverviewThis section describes the information you need to know before you disassemble or assemble the printer.3.1.1 PrecautionsFollow the

REV.-A3.1.3 Service Checks After RepairBefore you send the printer back to the customer, fill in the checklist in Table 3-3 to note the current state

3.1.4 Screw SpecificationsThis chapter uses abbreviationsabbreviations.FHI.-Afor small parts, such as screws and washers. Tables 3-4 and 3-5 list thes

REV.-A3.2 Disassembly and AssemblyThis section describes the procedures for disassembling and assembling the main components of the ““printer. In gene

REV.-A1.6 Main Components ~~ti...m-.--.--...--.-.m.m..-.mm. ...1-281.6.1 BOARDASSEMBLY,C094MAlN(Main ControlCircu

REV.-A3.2.1 Pre-disassembly Procedures[STEP 11Remove the PAPER GUIDE ASSEMBLY, top cover, front cover, paper eject cover, and tractor unit.Front Cover

REV.-A3.2.2 Removing the PANEL UNIT[.3[STEP 11Remove the PAPER GUIDE ASSEMBLY, top cover, front cover, paper eject cover and tractor unit.(See Section

REV.-A3.2.3 Removing the PRINTHEAD[STEP 1]Remove the PAPER GUIDE ASSEMBLY, top cover, front cover, paper eject cover, and tractor unit.(See Section 3.

REV.-A3.2.4 Removing the HOUSING ASSEMBLY, UPPERf“.:?.[STEP 11Remove the PAPER GUIDE ASSEMBLY, top cover, front cover, paper eject cover and tractor u

REV.-A3.2.5 Removing the PRINTER MECHANISM[STEP 11[STEP 21[STEP 31[STEP 41[STEP 51[STEP 61[STEP 71Remove the PAPER GUIDE ASSEMBLY, top cover, front co

REV.-A3.2.5.1 Removing the PLATEN ASSEMBLY(:).[STEP 1] Remove the PAPER GUIDE ASSEMBLY, top cover, front cover, paper eject cover and tractor unit.(Se

REV.-A3.2.5.2 Removing the FRAME ASSEMBLY, REAR[STEP 11[STEP 2][STEP 31[STEP 41[STEp 51[STEp 61[STEp 71[STEp 81[STEp 91Remove the PAPER GUIDE ASSEMBLY

REV.-A3.2.5.3 Removing the MOTOR ASSEMBLY, CRr..,., ,[STEP 11[STEP 2][STEP 3][STEP 41[STEp 51[STEp 61Remove the PAPER GUIDE ASSEMBLY, top cover, front

REV.-A3.2.5.4 Removing the MOTOR ASSEMBLY, PF[STEP 11Remove the PAPER GUIDE ASSEMBLY, top cover, front cover, paper eject cover and tractor unit.(See

REV.-A3.2.5.5 Disassembling the GEAR TRAIN, PF,.[STEP 1][STEp 21[STEp 31[STEP 41[STEP 51[STEP 61[STEP 71[STEP 81Remove the PAPER GUIDE ASSEMBLY, top c

REV.-ALIST OF TABLESTable 1-1. Line Feed Speed (1 line= 1/6”). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

REV.-A3.2.5.6 Removing the CARRIAGE GUIDE ASSEMBLY[STEP 11[STEP 21[STEP 31[STEP 41[STEP 51[STEP 61[STEP 71[STEP 81[STEP 91[STEp 101Remove the PAPER GU

REV.-AAssembly NoteWhen attaching the TIMING BELT to the CARRIAGE ASSEMBLY, secure the TIMING BELT using theleft and right clips of the CARRIAGE ASSEM

REV.-A3.2.5.7 Removing the Ribbon Drive (RD) ASSEMBLY[STEP 11[STEP 21[STEP 31[STEP 41[STEP 51[STEP 61[STEP 71[STEP 81[STEP 91[STEP 101Remove the PAPER

REV.-A3.2.5.8 Removing the Home Position (HP) DETECTORc.,.%,>[STEP 11Remove the PAPER GUIDE ASSEMBLY, top cover, front cover, paper eject cover, an

REV.-A3.2.5.10 Removing the Front and Rear Paper End (PE) DETECTORS[STEP 11[STEP 2][STEP 3][STEP 4][STEp 51[STEP 61[STEP 71[STEP 81Remove the PAPER GU

REV.-A3.2.5.11 Removing the DETECTOR, RELEASE[STEP 11[STEP 21[STEP 31[STEP 41[STEp 51[STEP 6][STEp 71[STEP 81Remove the PAPER GUIDE ASSEMBLY, top cove

REV.-A3.2.5.12 Arranging the CablesWhen you assemble the printer, arrange the cables as shown in Figure 3-22.>—1n n nhl\7/doPRINTER MECHANISMbw(Bot

REV.-A3.2.5.13 Disassembling the Tractor Unit[STEP 11Remove the PAPER GUIDE ASSEMBLY, top cover, front cover, paper eject cover, and tractor unit.(See

REV.-A3.2.6 Removing the BOARD ASSEMBLY, C094 MAIN[STEP 1][STEP 21[STEP 31[STEP 41[STEp 51[STEP 61[STEp 71[STEP 81[STEP 9]Remove the PAPER GUIDE ASSEM

REV.-A3.2.7 Removing the BOARD ASSEMBLY, C076 PSB/PSE[:.+WARNINGDo not touch the heat sink attached to the FET (Ql) when the printer is powered. If y