Maintenance, Replacing the Print Head | Star Micronics LC-20

I

MAINTENANCE

Essentially,your printer is a robust piece of equipment, but shouId be treatedwitha modicumofcarein orderto avoidmalfunctions.Forexample:

. Keepyourprinterin a “comfortable”environment.Roughlyspeaking,if you arecomfortable,thenthe environmentis suitablefor yourprinter,too (see Chapter1).

. Do not subjectthe printerto physicalshocksor excessivevibration.

. Avoidextremelydustyenvironments.Dust is the enemyof all precision mechanicaldevices.

. To clean the exteriorof the printer, use a cloth barely dampenedwith eitherwaterwith a littledetergentor a little alcohol,but do not allowany liquidto fall insidethe printer.

●Theinteriorof theprintermaybe cleanedwith a smallvacuumcleaneror a compressed-airaerosol(sold for this purpose).When performingthis operation, be sure not to bend or damage any cable connectionsor electroniccomponents.

REPLACING THE PRINT HEAD

Thisisnotajob whichyouwillneedto doveryoften.Thepnnt headhasbeen designedto last for about 100millioncharacters.In normaleverydayuse, thistranslatesto yearsof life.However,if theprintqualityis faint,evenafter youhavechangedtheribbonor youhaveadjustedthe gapbetweenthe print head and the platen (see Chapter1),the print head will need replacement.

Only use a replacementprint head as recommendedby your supplier.

1.Turn OFF the printer,and unplugthe power cord.

2.Removethe top cover and ribboncartridge.

3.Iftheprinterhasbeenin opeiationimmediatelybeforethisoperation,the print head will be hot. Allow time for the print head to cool before attempingto work on it.

4.Move the print head carriage toward the right until you can see the connectorcover. Removethe connectorcover and pull the cable free from the connector.

5.Unscrewthe two screwsthat hold the print head in pIace and set them aside.

95

Image 103

Star Micronics LC-20 user manual Maintenance, Replacing the Print Head

Contents

LC-20 Trademark Acknowledgements HOW to USE this Manual Page Features of the Printer Table of Contents Page Index Locating the Printer Chapter Checkthe cartoncontents Parts name of theprinter Lnsta// the ribboncartridge Mounttheplaten knobSetiwjg UP Removing the lop cover ‘ h~,.kribbo Connection \!j’06’$ Loading Single Sheets Automaticloading Loading a single sheet Manualloading Loading and Parking Fanfold Forms Loadingthepaper Figuru 7-11.Mount the fanfold psper over the sprockets Gufo 1-12. Mountingthe paper guide for fanfold forms Paperunparking Paperparking Adjusting the Printing GAP Page Control Panel Operations Buttons and Indicators On L/NE button PITCHbutton Paperfeed button FONTbutton POWER-UP Functions Short test mode Stay in panel pitch and font Long test modeStay in panel pitch Stay in panel font Next Lprint Hexadecimaldump Ill Form feed Switch Combination Functions Topof form Paper ParkingForwardmicro-feed Clearingthe buffer Reversemicro-feedPage Location of the DIP Switches DIP Switch Settings IBM Functions of the DIP Switches Inches OFF on 12 inches OFF OFF Denmark/Norwaywhen switch2-1 is on Printer Control Commands Select NLQ characters Font Control CommandsSelect draft qualitycharacters Select draft elite characters Select Oratorcharacterswithsmall capitals Select NLQ fontSe!ectCouriercharacters Select Sanserifcharacters Emphasizedprinting Select Oratorcharacterswith lower caseSelect italic characters Select uprightcharacters Start underlining CancelemphasjzedprjntjngCanceldouble-strikeprinting Double-strikeprinting Superscript Stop underliningStart overlining Stop overlining Select characterset #1 Cancelsuperscriptor subscriptSelectstandardcharacterset Select IBM characterset Enable printing of all character codes on next character Enableprinting of all charactercodesSelectinternationalcharacterset Pica pitch Character Size and Pitch CommandsSelect slash zero Select normalzero Expandedprinting CancelcondensedprintingCancelexpandedprinting Condensedprinting Select fixed spacing Cancelone-lineexpandedprintingExpandedprinting for one /ine r Selectproportionalspacing Increasecharacterspacing Selectmasterprint modeSelect doubleor quadruplesize Print double-heightcharacters Select charactersize Select characterheight, width,and line spacing Returnto normalheight Set line spacingto 1/6inch Vertical Position CommandsSet line spacingto 1/8inch Set line spacingto 7Y72inch Reverseline feed Set line spacingto n/72 inchExecuteESC a Line feed Set top of page at currentposition Performone n/216-imhline feedPerformone n/216-inchreverseline feed Feedpaper n lines Set bottommargin CancelbottommarginSetpage length ton lines Set page length ton inches Enablepaper-outdetector Disablepaper-outdetectorReturnto top of currentpage Select vertica/tab channel Set verticaltab stopsSet verticaltab stops everyn lines Set verticaltab stops in channel Verticaltab Horizontal Position CommandsSet left margin Set left and right margins Set right marginCarriagereturn Leftjustify Cancelautomaticline feedSet automaticline feed Backspace Set horizontaltab stopseveryn columns Resetall tab stopsRightjustify Set horizontaltab stops Absolutehorizontaltab in columns HorizontaltabRelativehorizontaltab Absolutehorizontaltab in inches Printdouble-density,double-speed8-bitgraphics Graphics CommandsPrint normal-density8-bitgraphics Print double-density8-bitgraphics Print quadruple-density8-bitgraphics Selectgraphics modeConvertgraphicsdensity Print 9-pingraphics Define draft downloadcharacters Download Character Commands Definedraft downloadcharacters DefineNLQ downloadcharacters Select downloadcharacterset Copy characterset from ROM into RAM Select ROM characterset Select draft downloadcharactersetSelect draft elite downloadcharacterset Select NLQ downloadcharacterset Accept MSB as is Cancellast lineSet MSB to Set MSB to O Setprinter on-line CancelquietprintQuietprint Set printer off-line One-1ineunidirectionalprinting BellBidirectionalprinting Unidirectiona/printing Setprint startposition onASF ResetprinterAuto feed Ejectpaper fromASF Designing Your OWN Draft Characters Download Characters Definingthe attributedata Ml m3 nd m7 m9 mll Nl~ ,4 m6 Samp/eprogram Assigningthe characterdata LLlEL EX’ Defining Your OWN NLQ Characters 1s1 ml Memo MS-DOS and Your Printer Installing Application Software with Your Printer CPI Embedding Printer Commands Printer Commands Programming the Printer with DOS Commands ESC ?COPY NLC?ELITE. PAT PRN Programming with Basic 1470NEXTI 1820REAOIX 2180 2190 Page Expdncled..Double-height, Ihub 1e-s ized Page Troubleshooting Troubleshooting and Maintenance If the Power indicatordoes not illuminate,checkthe following If the print is faint,or uneven,checkthe following Page Check Possibleremedy Relativetothepage Replacing the Print Head MaintenancePage Page Page Specifications DPI Ribhntife ~fi~.~fi~ Imillion charactersdraft pica 102 Character Sets 104 105 Standard Character SET #2 International Character Sets IBM Character SET #2 ’m -G 109 IBM CH/ ,RAC’‘ER SET IBM Special Character SET 112 Index Oor L b Z 8 mi Z l t 1th D1e Command Summary ‘Irr’ Pb m,cp 119 WorldwideHeadquarters AmericanMarket