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EPSON LX-300+ Service Manual

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2. 7 7 Parts List Table 7 48 Parts List continued Number Parts Name Available printer parts are listed below The number in the left hand column 5 Rare REN refers to parts shown in the exploded diagrams on the following pages Bing ANDERE 130 C B 0 SCREW 4X8 F ZG Table 7 48 Parts List 131 C P SCREW Number Parts Name 132 C B S SCREW 100 HOUSING ASSY LOWER 180 GUIDE STACKER 101 INSULATOR A 200 BOARD ASSY MAIN 102 INSULATOR B 320 HARNESS 103 HOUSING UPPER 300 BOARD ASSY POWER SUPPLY 104 SHIELDPLATE LOWER 400 POWER CABLE ASSY 105 COVER ASSY PRINTER 450 BOARD ASSY PANEL 106 KNOB W 451 SHEET PANEL 109 SHEET GUIDE ASSY 500 PRINTER MECHANISM M 3M10 100 111 SHIELDPLATE UPPER 501 FRAME LEFT 115 COVER CONNECTOR CS W 502 FRAME RIGHT 116 HEXAGON NUT 503 MOTOR ASSY CR 117 GROUNDINGPLATE 504 EXTENSION SPRING 8 10 118 GROUNDING PLATE PANEL 505 LEVER ASSY PLANET 119 EDGING A 506 SHAFT CR GUIDE 120 LOGO PLATE 509 SPURGEAR 13 2 123 FERRITE CORE FPC 25 20 510 COMBINATIONGEAR 5 1 16 2 124 SHEET PROTECT 511 MOTOR ASSY PF 125 CONNECTOR LOCK NUT 512 COVER RD 126 RIVET B TITE SCREW TYPE 513 RATCHET RD 127 C B P TITE 3X10 F ZN 514 DETECTOR LEAF B1 128 C B S SCREW 515 GROUNDING WIRE PLATEN EPSON LX 300 Appendix
3. Table 7 48 Parts List continued Table 7 48 Parts List continued 516 PULLEY ASSY DRIVEN 542 BUSHING PARALLEL ADJUST 517 HARNESS HP 543 CABLE HEAD 518 C P B SCREW 544 HARNESS PG 520 PAPER GUIDE 545 PAPER GUIDE LOWER 521 DETECTOR PE REAR 550 SPURGEAR 17 522 HARNESS PE REAR 551 PAPERSUPPORT 523 DETECTOR PE BOTTOM 552 FRAME TR RIGHT 524 HARNESS PE BOTTOM 553 FRAME TR LEFT 525 HOLDER ROLLER PF 554 TRACTOR LEFT 526 ROLLER PF DRIVEN 555 TRACTOR RIGHT 527 ROLLER PF DRIVEN REAR 556 SHAFT TR GUIDE 528 COMPRESSION SPRING 13 72 557 SHAFT TR DRIVE 529 SHAFT RELEASE 558 RETAINING RING 530 PAPER GUIDE ASSY 559 DAMPER 531 RETAINING RING 560 FRAME BASE 532 BUSHING 11 561 PAPER GUIDE SUPPORT 533 U TYPE 11 2X0 13X16S NA 562 GROUNDING PALTE SHAFT CR 534 PLAIN WASHER 563 SHEET CABLE HEAD 535 PLATEN 564 GEAR 34 536 CARRIAGE ASSY 565 SPUR GEAR 27 5 537 GROUNDING PALTE HEAD 566 PLAIN WASHER 538 OIL PAD 567 COMPRESSION SPRING 1 18 539 LEVER G ADJUST 568 COMBINATION GEAR 8 5 25 2 540 RIBBON MASK 569 HARNESS RELEASE 541 TIMING BELT 570 PAPER EJECT ASSY EPSON LX 300 Appendix Table 7 48 Parts List continued Number Parts Name 571 COMBINATION GEAR 17 5 27 573 GROUNDING PLATE CS 574 GROUNDING WIRE LEFT 575 GROUNDING WIRE RIGHT 576 GROUNDING PLATE PF 577 SHEET PROTECT CABLE 578 SHEET PR
4. EPSON LX 300 Appendix Table 7 44 Envelopes Table 7 45 Continuous Paper single sheet and multi part Rear Entry Bottom Entry le Hu i l inch 4 10 4 10 No 6 tenet WA 3 6 Width mm 101 6 254 101 6 254 mm 92 Length inch 4 22 4 22 Width a 9 5 one page mm 101 6 558 8 101 6 558 8 mm 241 Envelope Copies 1 original 4 4 copies 1 original 4 copies No 10 AWA inch 4 1 engt mm 105 l inch 0 0025 0 015 0 0025 0 015 Total Thickness mm 0 065 0 39 0 065 0 39 0 0063 0 0205 linch 0 16 0 52 Weight g m 52 82 52 82 Total Thickness t Itipart Ib 14 22 14 22 mm Thickness in the printable area varies no more than normuliham 0 25mm 0 0098 inch Weight m 40 58 40 58 5 one sheet of Ib 12 15 12 15 Weight al 2 a multipart 2 E Plain recycled or Plain recycled or Bond plain or air mail Quality carbonless multipart carbonless multipart Quality No glue at a flap paper paper Not curled folded or crumpled ae z A Soe Point glue or paper Point glue or paper NOTE Printing on recycled paper is available only under normal Jointing staple both sides staple act sides temperature and humidity conditions Table 7 46 Continuous Paper with Labels Rear Entry Bottom Entry Label size See the figure below inch 4 10 Base sheet width ham 101 6 254 Base sheet length inch es 4 22 one
5. Ribbon Initialization During printer initialization the ribbon is positioned for black printing At the same time the carriage moves to prevent the ribbon from getting caught on it This initialization also takes place when the print buffer clears or the printer is paused Color ribbon drive circuit CS lever assembly Color ribbon CS lever assembly Black Cyan Magenta Yellow Color cartridge holder CS motor pinion CS cam op04 Figure 2 3 Color Ribbon Mechanism EPSON LX 300 Technical Overview 2 1 4 Platen Gap Adjustment Mechanism Adjust lever The platen gap lever changes the distance between the printhead and the platen This lets the printer print on thicker paper Carriage guide shaft wazi i A ee Carriage When printing on thick paper or multipart forms the lever is set to position 1 2 3 or 4 The lever trips the platen gap sensor a mechanical contact switch Parallelism adjust and causes the carriage to move at a slower speed this prevents printhead bushing Parallelism adjust pins from getting lodged in the paper and breaking off PG SW u bushing Table 2 7 PG Sensor Specifications Item Specification Electrical rating 0 6 to 1 0 mA 5 V 5 e PG 0 closed e PG 1 4 open Switching mode Printer mechanism Printhead Platen gap Adjust lever Platen Carriage Carriage guide shaft op05 Figure 2 4 Platen Gap Adjustment Mechanism
6. dis05 Figure 4 2 Upper Housing Removal 43 EPSON LX 300 Disassembly and Assembly 4 2 4 Printer Mechanism Removal Printer Mechanism Main Board Preparation Remove the upper housing see Upper Housing Removal on page 43 1 Remove 5 screws securing the shield cover to the lower housing Remove the shield cover screws Shield cover CBB 3x14 with washer CBB 3x14 with washer sas Printer Mechanism Figure 4 4 Cable Removal dis06 Figure 4 3 Upper Shield Plate 4 Remove the printer mechanism 2 Remove 2 screws with washers CBP 3x14 securing the printer Wem If you replace the printer mechanism perform the Bi D mechanism to the lower housing SU adjustment on page 60 3 Tilt the printer mechanism back and remove the cables from the main board EPSON LX 300 Disassembly and Assembly 4 2 5 Control Panel Board Removal 4 2 6 C294MAIN Board Removal Preparation Preparation Remove the upper housing see Upper Housing Removal on page 43 a dello upper housing see Upper Housing Removal on page 1 Remove the ribbon cable from the connector on the control panel board F i 7 di U Remove the printer mechanism see Printer Mechanism Removal 2 Remove 3 screws CBP 3x10 securing the control panel board to the on page 44 lower housing 1 Remove 2 hexagon nuts securing the se
7. 26 EPSON LX 300 2 1 5 Paper Feed Mechanism The are two standard ways of feeding paper through the printer by friction feeding and by using the push tractor AU When friction feeding set the tractor release lever to cut sheet paper When you insert the paper into the rear loading slot the RPE sensor detects the paper and the printer automatically advances it to the TOF position When using tractor feeding set the tractor release lever to the tractor position The paper feed motor disengages from the paper feed rollers and transfers drive to the tractor The mechanism is shown below Compression spring Tractor gear Plain washer Tractor release lever Paper Release advance detector reduction f A ear amp A ER Y 4 y XX 7 S Br y PF motor op06 Figure 2 5 Tractor Release Mechanism Standard feeding methods allow continuous forms to be fed through the rear loading slot using either friction or push tractor feeding or cut sheet paper can be fed through the top loading slot one sheet at a time using friction feeding Other feeding methods include using the optional cut sheet feeder pull tractor unit and roll paper holder Technical Overview The paper feed motor has the following specifications Table 2 8 PF Motor Specifications Item Specification Motor type 2 phase 96 pole hybrid stepper motor 16 0 Q 10 25 C Bi polar rated current drive 1 2 phase W1 2 phase 36 7
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9. FE AK C4 IGE A R56 R82 km TLas1cLp TTA 10ELS2 a as TR De3 300 Or Egu DTA113Z i lt 4 sie GMBO1 BT 4 Ge O sw lt mo s GMB01 BT At D86 2 10 R21 R20 pei R54 F1 SW 10K 3K 5 e 4 AS7 47K T1 25AH N 150 250V Sul a 5 3 Hzshana 081 2 DTA115E a te DIAS b CN1 5 Da R68 R69 AZ i pes 1 t EN TLP621 2 D4 6B 19 ES 4 i GMBO 1 BT 220 240VAC HTA AI 10K OSH 2035 WPL ABB 2 101 HT2 11PB15L25A Model Lx 300 Ai eS Board C294BSE BOARD D51 FG Rev A Sheet 1 0874
10. m Black 1 million characters Draft 10 cpi 14 dots character NW Magenta 0 7 million characters Draft 10 cpi 14 dots character E Cyan 0 7 million characters Draft 10 cpi 14 dots character Yellow 0 5 million characters Draft 10 cpi 14 dots character EPSON LX 300 Appendix 7 2 7 Safety Approvals A 120 V version mM Safety standards UL1950 CSA C22 2 No 950 E EMI FCC part15 subpart B class B CSA C108 8 class B OU 230 V version mM Safety standards EN60950 VDE m EMI EN55022 CISPR pub 22 class B AS NZS 3548 class B 7 2 8 CE Marking 230 V version and UPS version E Low voltage directive 73 23 EEC EN60950 E EMC Directive 89 336 EEC EN55022 class B EN61000 3 2 EN61000 3 3 EN50082 1 IEC801 2 IEC801 3 IEC801 4 7 2 9 Acoustic noise Level 49 dB A ISO 7779 pattern EPSON LX 300 Appendix 7 2 10 Printable Area Table 7 19 Printable Area for Cut Sheets Q Cut sheets Single Sheet Multi Part PW PW Width Refer to Paper Refer to Paper Specifications on page 96 Specifications on page 96 LM RM PL Length Refer to Paper Refer to Paper Specifications on page 96 Specifications on page 96 LM Left Margin When PW lt 229 mm When PW lt 229 mm TM 3 mm or more 3 mm or more When PW 257 mm When PW 257 mm 24 mm or more 24 mm or more RM Right Margin When PW lt 229 mm When PW lt 229 mm 3 mm or more 3 mm or more When PW 257 mm Whe
11. 2uu nennen 47 4 2 8 2 Platen Removal medina le 48 4 2 8 3 Carriage Removal coooooccccnnncocccccnnoconcnononannncnnnnnnn nc cnn 49 4 2 8 4 Ribbon Feed Mechanism Disassembly wwwwmammaaa 50 4 2 8 5 BPE and RPE Sensor Removal 0 cccccceseeceseeeeseeeeeeeas 51 4 2 8 6 Home Position HP Sensor Removal ee 51 4 2 8 7 Platen Gap PG Sensor Removal uueeennen 52 4 2 8 8 Removing the Tractor Release Lever Sensor 52 4 2 8 9 Paper Feed PF Motor Removal seese 53 4 2 8 10 Removing the Tractor Drive Gears nennen 53 4 2 8 11 Paper Guide Removal ccccecceceeeeseeeeeeeeeeeeeeeeeees 54 Chapter 5 Adjustments 5 1 Platen Gap Adjustment nuesnnnsnnennnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn 59 5 2 Bidirectional Adjustment zzumunnnnneenennennnnnnnnnnnnnnnnnnnnnnn nennen 60 Chapter 6 Maintenance 6 1 Overview nnnnennnnnnunnnnnnnnnunnnnnnnnnununnnnnmanunnnnnnnunannnnunnnnnnannnnunannnnunnnnnn anne 67 Gl PW Cleaning sans RE aha 67 6 1 2 L DICO nee Se ee rss adi s Die 67 Chapter 7 Appendix 7 1 Electrical Connections uursunresnnnnsnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn 73 7 1 1 Connector Summary AAA AAA AWA 73 7 1 2 Connector Pin Assignments urs224440ennesnnnnnnnennnnnnn nennen 73 7 2 Printing Specifications uuunnuesnnnnnnnannnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnennnnnnn 76 7
12. 6 1 2 Lubrication Use only the following types of oil and grease to lubricate the printer Table 6 1 Lubricants Type Name Quantity EPSON Part No Grease G 26 40g B702600001 Oil 0 2 40 cc B710200001 EPSON has determined the best types of lubricants for this printer based on extensive testing Use only the lubricants listed above Incorrect lubricants can damage the printer or hinder performance E Avoid touching the printhead after printing it may be hot Lubricate the printer by referring to the figures below and on the following pages Boss Apply G 26 to the 3 short shafts and 1 boss of the ribbon drive mechanism G 26 1 2 grain of rice Apply G 26 to the long shaft of the RD ratchet G 26 1 grain of rice gi en Figure 6 1 Ribbon Drive Mechanism 1 of 2 Apply G 26 to the gear teeth as shown G 26 1 2 grain of rice Figure 6 2 Ribbon Drive Mechanism 2 of 2 EPSON LX 300 Apply G 26 to 3 shafts on the right frame G 26 1 grain of rice Lubricate G 26 at 2 places as shown on the release lever Make sure some of the grease lubricates the inside of the release lever where the sloped surface contacts the gear G 26 1 grain of rice Figure 6 4 Tractor Release Lever PF rollers Maintenance Apply G 26 to the end points on each paper feed roller shaft Avoid getting grease on the rollers themselves G 26 1 2 grain of rice Figure 6 5 P
13. 7 5 Paper Specifications mociones 96 7 6 Physical Specifications_ unssnsnsnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnannnnnnnnnnnnnnn 99 7 7 PARAS LIStd ici denne ana AAA WAWA AA 100 7 8 Exploded Diagrams uunnnnssnnennnennnnnnnnnnnnnnnnnnnnnnnnnnnnnnsnnnnnn nennen 103 7 9 Circuit Dia Gram AAA AAA AA AAA SIE 105 EPSON LX 300 1 1 Features O Printing speed Feeding method Feeder Paper Media Fonts Character tables Input buffer Acoustic noise Reliability Interface Control code Copy capability The EPSON LX 300 is a 9 pin serial impact dot matrix printer Its major features include High speed draft 300 cps at 10 cpi Draft 225 cps at 10 cpi NLO 56 cps at 10 cpi Friction feed rear Push tractor feed rear Push and Pull tractor feed rear Pull tractor feed rear bottom Standard Rear push tractor Optional Cut sheet feeder bin Pull tractor and Roll paper holder Single sheets Continuous paper Multi part forms Envelopes Labels and Roll paper 2 NLO and 1 Draft Bitmap typefaces 8 Barcode fonts 13 tables 38 tables Standard version NLSP version 8 Kbytes 49 dB A ISO 7779 pattern 12 million lines except printhead MTBF 6000 POH 25 Duty Printhead life 200 million strokes per pin Ribbon life 3 million characters Total print volume Bi directional parallel interface IEEE 1284 nibble mode supported Serial I F ESC P and IBM 2380 Plus emul
14. Appendix 7 1 Electrical Connections The figure below illustrates how the primary components are connected Control Board C294MAIN CR Motor Serial I F Parallel I F PF Motor Operation Panel C294PNL HP Detector PE REAR Detector Release Detector PE bottom Detector PG Detector CS Motor Print Head CN2 AC IN gt Power Board C294PSB PSE app01 Figure 7 1 Cable Connections 7 1 1 Connector Summary The following table summarizes connections to the main board Table 7 1 C294MAIN Board Connector Summary Connector Function Pins CN1 Parallel I F 36 CN2 Serial I F 6 CN3 HP Sensor 2 CN4 PE Rear Sensor 2 CN5 Tractor Release Sensor 2 CN6 PE Bottom Sensor 2 CN7 Platen Gap Sensor 2 CN8 Power Supply Board C294PSB PSE 9 CN9 Printhead 12 CN10 CR Motor 4 CN11 PF Motor 4 CN12 ee ae ee for optional 10 CN13 Control Panel C294PNL 12 7 1 2 Connector Pin Assignments The following tables define the functions of each connector s pins Table 7 2 HP Sensor CN3 Pin 1 0 Signal Name Function 1 I HP Home position signal 2 GND Signal ground EPSON LX 300 Table 7 3 PE Rear Sensor CN4 Pin 1 0 Signal Name Function 1 l RPE Rear paper end signal 2 GND Signal ground Table 7 4 Tractor
15. Dior serial Ur 2 si Ae ne pa Be ate Ata 040 Bat re Rat 12 32 3 atat a pjer wr o ahar Haia E ote ne oe O2CBN 1 R43 200 Als EME Za ae Bs 43 100 DIS ATT 33 Ali 07122 oT AUT DI7T aa aoe Femi N 4 Ae ieee giS Eden a oe A ore ote Ste po zaout Tanh Baa a100 35125 SS po ado Be f Bey O 4 Tzour tain 40 ae a AB na fee Ae Be ME AB D4 We bi Rev 4 igor remis 1013 Cs SAS Bes mE Als ajaa Dale as BS m 1013 75l300 nas A OSA JE E Sho rea HAL 0 2 ost ne 4 7K 11 13 oy c2 S_S1 q14 74L500 43 10K TAEST a7 819 paia i PIERI ATE 5 48 He ist pet mso 4 tu du 10 41 AH yo Ba Ai 0114 2 POS pH 5143 Eier GND 16V L cat c2 4 T 16v 8 12 R45 200 Alaa Awa a 435 Dis 300 0113 Ala re 3 ZT 202 ira YE piste a TEKS Als 443 ay aay s o 3 ve v8 at E Dispo a 0135 sy AE lai vec 22 a lets Ame WE 5 49 Fe O 24 cia VCC GND A17 c61 c67 Fed E ee BA salar cs cs 158 iv aie a so gros 100 1 12 EE T Og I i ja Ma WI me men re wedi TJ 2 ib esa za El cag 82 RI93 app 199 Eu Stu a2 R03 188 dh u WA 123 ES 55 ajos 100 ARN EEE 188 1284 1 tar ess xanh Be 158 se 99 a xcea Bi AN cni wo 0sc3 t200 GND du 10 4 4 2 END R219 Bas END osca Fi Ein GND 5 anand gt GND XCE9 17 ENB a END Pes SND aD pes Pos ae cA Motor 117 Za s Poetas ES ng a les aig a Fo paplis ala ary pales nen Fs oxo oe ats Far Sales PIEN a pie 84 yA 34 46 os 68 MEN XRESET A7 pae se Lorn 26 ate 2 oles Bit a J EN 83 yy 3 38 ate 22 48 BAGH Stet 2 z se ES pat
16. LAT 28H 00H PC APTEC OEH 30H PC866 UKR 29H 00H PC 708 OFH 00H PC869 2AH 00H PC720 ODH 20H PCAR_864 7FH 02H ISO 8859 2 1BH 00H MAZOWIA 2DH 00H PC771 Fatal error 00 Port is not selected 01 Release lever position error 03 Paper out 06 EPSON LX 300 Appendix Table 7 39 Paper Path Codes 7 4 3 2 Packet commands Continuous paper bottom 0001 Device ID request di 01H 00H 01H Cut sheet rear 0200 Device ID reply 1 EJL SP ID CR LF lt Device ID string gt FF CSF Single bin 0100 State Reply request st 01H 00H 01H State Reply 2 BDC SP ST CRLF lt printer status string gt FF Table 7 40 Characteristic Status Codes F a No support XX FF Location Size Type Refer to command XX is the invalid command string Structure version us 2bytes 027 fixed u NOTES 1 The reply string is as same as BDC ID Reply Starting date 2 6bytes yy mm dd SD command 2 The reply string is as same as BDC ST Reply Total printing line 8 8bytes nnnnnnnn TL command number Total power on hour 16 4bytes nnnn TL command Total printing number for ribbon charge 20 8bytes nnnnnnnn TL command timing MIB proxy information is reported as follows 1G 0305NA Sheet feeder b
17. Release Sensor CN5 Pin 1 0 Signal Name Function 1 RELEASE Release sensor signal 2 GND Signal ground Table 7 5 PE Bottom Sensor CN6 Pin 1 0 Signal Name Function 1 BPE Bottom paper end signal 2 GND Signal ground Table 7 6 Platen Gap Sensor CN7 Pin 1 0 Signal Name Function 1 l PG Platen gap copy mode sensor signal 2 GND Signal ground Appendix Table 7 7 Power Supply Board CN8 Pin 1 0 Signal Name Function VH 1 35VDC 2 VH 35VDC 3 GP Signal ground 4 GP Signal ground 5 O PSC Power save control 6 O POFF Power off signal 7 5V 5VDC 8 5V 5VDC Table 7 8 Printhead CN9 Pin 1 0 Signal Name Function 1 O HD7 Head data 7 2 O HD8 Head data 8 3 O HD9 Head data 9 4 O HD3 Head data 3 5 HDCOM Common VP 6 HDCOM Common VP 7 HDCOM Common VP 8 O HD2 Head data 2 9 O HD9 Head data 9 10 O HD4 Head data 4 11 O HD8 Head data 8 12 O HD6 Head data 6 EPSON LX 300 Appendix Table 7 9 Carriage Motor CN10 Table 7 12 Control Panel CN13 Pin 1 0 Signal Name Function Pin 1 0 Signal Name Function 1 O CRA Carriage motor phase A 1 5V 5VDC 2 O CRA Carriage motor phase A 2 O LED5 LED5 3 O CRB Carriage motor phase B 3 O LED4 LED4 4 O CRB Carriage motor pha
18. at 25 C 77 F If it s too low the coil may be shorted out if it s too high the coil may have opened VIEW FROM POINT A trbO1 Figure3 1 Printhead Leads If the printhead checks out okay the problem may be with the driver See Printhead Driver Check on page 38 EPSON LX 300 Troubleshooting 3 4 2 Motor Check Follow these steps to test the carriage and paper feed motors 1 Set the multimeter to measure resistance 2 Measure resistance across pins 1 and 3 and then across pins 2 and 4 The meter should show the values indicated below Table 3 8 Motor Coil Resistance Motor Specification 5 7 Q 10 CR motor at 25 C 16 0 Q 10 PF motor at 25 C To test the CS motor on the optional color ribbon mechanism follow these steps 1 Set the multimeter to measure resistance 2 Connect one of the probes to the brown wire 3 Connect the other probe to each of the other four wires blue white red and orange In each case the resistance should measure 150 Q 5 at 25 C 3 4 3 Sensor Check All the sensors in this printer are mechanical contact switches To test a sensor follow these steps 1 Set the multimeter to measure resistance 2 To access the sensor either remove it from the printer so you can touch the meter s probes directly to the sensor s leads or unplug the sensor s cable from the main board and touch the probes to the end of the cable 3 Toggle the
19. first alignment pattern Ribbon cartridge Black 8750 2 Follow the printed instructions to adjust the alignment for each of the Ribbon pack Black 8758 following print speeds 3 Ribbon cartridge Color S015073 E high speed draft mode E draft mode Table 1 7 Options 3 Turn the printer off Cut sheet feeder C806371 Th tti tored in the printer s memory nn SP Y Pull tractor unit C800301 To perform the Bi D adjustment using the adjustment program see page 60 Roll paper holder 8310 Color upgrade kit C832081 EPSON LX 300 Product Basics EPSON LX 300 Technical Overview 2 1 Printer Mechanism The printer s main components are shown below Rear paper end sensor Tractor Release sensor Release mechanism Paper feed motor Bottom paper end sensor Platen Carriage guide shaft Timing belt Adjust lever Carriage motor Platen gap sensor Carriage Printhead Ribbon Feed Mechanism Carriage home position sensor op01 Figure 2 1 Printer Mechanism Block Diagram EPSON LX 300 Technical Overview 2 1 1 Printhead The table below indicates printhead specifications The printhead s pins are configured as shown below The view is from Table 2 1 Printhead Specifications Number of pins 9 3 3 degrees Pin diameter 0 29 mm Coil resistance 33 3 3 3 Q 25 C Head drive voltage 35 2 1 3 5 V e Normal 0 75 A Standard Peak current e Copy 0 85 A S
20. in default setting carriage control or power supply failure mode When both Font lights blink paper is in the tear off position When the paper Table 1 3 Operation at Power On is positioned for printing the Font lights indicate the currently selected font ED Draft Tear Off Changes the setting mx Draft Condensed OM Roman LF FF Selects the Menu o0 Roman Condensed Ox Sans serif For more information see Default Setting Mode on page 16 xE Sans serif Condensed x Tear Off 0 LED On m LED Off x LED Blinks 1 2 1 3 Beeper A Paper out error three beeps O Release lever operation three beeps O Illegal panel operation one short beep EPSON LX 300 Product Basics 1 2 2 Default Setting Mode You can change the printer s default settings by following these steps 1 Turn the printer on while pressing Tear Off The printer prints a set of instructions 2 Follow the printed instructions to change these default settings standard factory settings are underlined Table 1 5 Default Settings Item Setting Value 2 Page length for tractor 3 inch 3 5 inch 4 inch 5 5 inch 6 inch 7 inch 8 inch 8 5 inch 11 inch 70 6 inch 12 inch 14 inch 17 inch Skip over perforation OFF ON Auto tear off OFF ON Auto line feed OFF ON Print direction Bi d Uni d Auto Software ESC P IBM 2390 Plus 0 slash OFF ON High speed draft OFF ON Table 1
21. sure the home position Does the carriage move before the pee ee Y and Hinter drenlevea fatal error YES working Replace it if necessary p pay If that s not the problem replace the main board Test the power supply board for the proper output To do this disconnect CN8 on the main board Pin 9 is the NO Replace the power supply board ground Is the output 5 V at pin 8 and 35 V at pin 1 NO Reconnect them power supply board properly Is the power supply properly connected to CN8 on the main board NO Connect CN8 properly Test the power switch Is conductivity of the switch is OK NO Replace the switch Test the power supply board for the proper output To do this disconnect Replace the deweredenl CN8 on the main board Pin 9 is the NO iene P PP Y ground Is the output 5 V at pin 8 and 35 V at pin 1 Is the control panel connected NO aces properly properly to the main board Check for problems with the printhead printhead driver transistors PF motor and CR motor See Test Points on page 37 If these components check out okay replace the main board Replace the control panel EPSON LX 300 Troubleshooting Table 3 4 Self Test is Abnormal Table 3 5 Paper Feeds Improperly Possible Problem Y N Solution ae Adjust the platen gap or replace Is printing too light or weak YES the ribbon Do smudges appear on printed YES
22. xces 120 alig Ea ea PIE 8 8 natae 03 EVER pas 23 419 Ale Sho i ion SATA O Bae Wea B3s xeusack xenewmo Ze Bibs ieee E E barep am ERS Seran HA SES ae Se Data O E BEE os1o IES 22 xe0 Dia ae IH para OS Hae Va ost BERERERREGE a pia xLINO 38 238 ao Bis k s nuingen e 9909090900909 Xe smr OTe Bat NWS Se pa x518 H O P30 xwarT 84 AI MAIT cara2 H 345 BE Ee ete ora 53 42 ctypacs gaa Hee tv 3 c19 cas L ass cas R148 3130 018 EE BoT PA Toe xEES IS xoacs caso 187 BR Bir K52 xaotas 24 XOREDO caes HEE 3 ETE GND 5V GND 25 sa Snes WA GH oie KS1 XOMAREO XOREOS as 7 YA wA poa 2 58 yinITAEO Creve Hai osi pLiso ER pa aena HS i i pos XIEEEREO ERENS we puis NC O34 Pas 122 Bt lytas 141 xxaseo paa So camas 112 ESO aan 133 toy 232 asomo B39 BATA cave haa he ols ee EN EA 18082 Tee 1P27 eee Eve ES ace 28 zcemo Graves 138 vo da 3373 yyy 22 zamba 13 pp Enea LE 12 8172 Ay 22 ass 4 913 m se e PF Motor PEO I Eno Pts XOENDO amp 8v 1210 sict O 2173 41506 10 41 TET 45v P07 SAMP XNRADY I TP45 END SS 32 A174 22 741506 8 9 POG E SAMP_XCMREG 138 Ial DUTA PFA XERR O Tor 115 73 PEAS lass 21145 s a a walt 615 Poe eee eaawo ack ocux brag tae SS oura Pra LHO BFAA alla x pas BA HITS ours pre rt Bee 20 185 ours e 4_Opr 8 41505 aza an Tees 1803 Brea 182 E E 130 183 3 a PANEL c nica vcc haf er 9 TEs 15 prona t ph 8 8 sn AD K6O TP32 TBAO prene Hiat 5 A ona 4vo A0 K64 BEENA Lise vas Ei E o vera eo Fav ENDE TE
23. 0 65 0 65 0 59 0 59 0 59 144 1350 Bit image 144 dpi l low H 900 Both 1 2 0 65 0 65 0 59 0 59 0 59 180 1350 NLO 15cpi low l 675 Both 1 2 0 65 0 65 0 59 0 59 0 59 240 1350 NLO 17 20cpi J low J 450 Both 1 2 0 65 0 65 0 59 0 59 0 59 low EPSON LX 300 Technical Overview 2 1 3 Color Ribbon Mechanism Optional The color ribbon mechanism color shift or CS mechanism shifts the color ribbon up and down to change the color area of the ribbon The mechanism includes a sensor mechanical contact switch to detect the presence of a ribbon cartridge If one is installed the output is HIGH if not installed the output is LOW To avoid unwanted mixing of colors composite colors are applied ina specific order The following table shows how green violet and orange are composed Table 2 5 Color Printing Order Composite Color First color Second color Green Yellow Cyan Orange Yellow Magenta Violet Magenta Cyan The color ribbon mechanism uses a stepper motor with these specifications Table 2 6 Color Shift Motor Specifications Item Specification Motor type 2 phase 48 pole PM stepping motor Coil resistance 150 Q 5 25 C per 1 phase Control method uni polar rated voltage drive Phase drive 2 2 phase Drive voltage 36 75 1 75 VDC Consuming current Operating peak current 245 mA e Non operating 20 mA Drive frequency 500 pps
24. 2 0V to Input 0 8 to 2 0 V 12 mA when V 0 8V 50 pF A HIGH logic signal is 2 0 V or less when the printer is off and 3 0 V or more when the printer is on The receiver has an impedance equivalent to 7 5 kQ Parameter Minimum Maximum tsetup 500 nsec u thold 500 nsec tstb 500 nsec tready 0 tbusy 500 nsec treply A tack 500 nsec 10 us tnbusy 0 ZA thext 0 they 120 nsec tin 200 nsec Rise and fall time of output or input signal EPSON LX 300 Appendix L BUSY signal is active HIGH level under the conditions below Table 7 25 Pin Signals continued E Inthe process of receiving data Return JA SAANA GND In Out Functi ID ipti E In the condition of being input buffer full Pin By E Inthe condition of being INT signal active low level This signal negative pulse indicates Mm During hardware initialization 10 ACKNLG 28 Out thatthe printer has received data and is ern ready to accept next data E Inthe condition of being ERROR or PE signal is active low level high a level respectively 11 BUSY 29 Out This signal s high level means that the printer is not ready to accept data E Inthe self test mode Tiie deres het Ewell Tents is signal s high level means that the m Inthe adjustment mode 12 PE 28 Owi printer has a paper out error a ee 7 F
25. 2 1 Printing Specification 22444404n ss nnnnnnnnnnnnnnnnennnnnnnne nennen 76 Tae Paper Feeding Helena kn 79 7 2 3 Electrical Specification ccccecceceeccecceceeeeeeeeeteteeeseceeeeeeeeeees 80 7 2 4 Environmental Condition oooooooocccccccccccccnconoonnnncnnnnnncnnnnnnnnnnnnnnnos 80 7 2 5 Reliability 28 een 80 7 2 6 Ribbon Cartridge etii a iaaea a A N 80 7 2 7 Safety Approvals c ceccccecceceeceeeeeeeeeeeaeeeeeeeeeeeeeeetseesnnsenaes 81 1 2 8 GE Marking ar runter nie 81 1 2 9 Acoustic noise ni Heil 81 1 2 10 Printable Area oc Seesen ehe 82 7 3 Interface Specifications uuenusnuennnnnsnnnnannnnnnnnnnnnnnnnnnnnannnnnnnnnnnnn 85 7 3 1 Parallel Interface Forward Channel e nn 85 7 3 2 Parallel Interface Reverse Channel 4e nn 87 7 3 3 Serial Interface suicide 88 7 3 4 Interface Selection oooooonccnnnnnnnonoononcncccnccnccnncnnnnnnnnononccnnnnncnnn 89 7 3 5 Preventing Data Transfer Time out nensnnnennennnnnenennn 89 7 3 6 IEEE1284 4 protocol IA wea kaaa 89 7 4 Control CodeS una reise 90 LAN ESUP 2 eta creci Dl engine 90 7 4 2 IBM 2390 Plus Emulation ii Aa 91 7 4 3 Bi Directional CommandaS 24424444444400HHnennnnnr nennen 92 7 4 3 1 Reply Printer Status wwmmssemmmwnawmamamawwmimaawwza 94 7 4 3 2 Packet commandsS 222224244402020000000nnnnnon nenn nn 95
26. 33 XCS_TYPES l P aut An on TP34 XTBAST BET GND kati YA gi cS Motor steel Raye Tess xwanDy PEHOLO vee Rat 221 ABUKBA TEE pees Prya Hae wes edu a ND ANIA Sap N qpee P7 XROREG PrVF2 o biu ca 45V Risa 105 c22 110207 tov 8 ing E AD X87 a Teae INH Q 10601 5 du SCT Lag Su 2 138 Kr eno 10 0 eno F A NEdoaorp sooc a ve pa FT ei g Y TEIR GND MMCT1 25A 12 a eh sua O osc CTO VRES a2 END SP SP raed 7 DTC114T A VIN vec Zo Low T Sa ural 20 yaeser er GND GND 6P GP F D g g os or 39p 39p 39p GND CS HOLD do No 25 2130 yy 4 Kan Erw War EQ EA a REEM 9 3 5 a Li 25 paTAs A peas Lena 93 BS batas E 1 1 aa Eg paras csro o 24 reso d SOIDATAS En 7 c208 7 c209 aan 1nouT7 18860 188 TAS mes Lgs7 0230 C211 C212 C213 m HEAD a Sn 2700 S55 205 2765 Za E ces ceo cao cas caz BS XINIT END rag 2 om 800 5280p 2000 200p 52809 ar WA Ba GND RER PEEN 25022084 S568868 24 xack moa 252 45V Beer 1 a aa os i hoz Sect a asa Rea 03 Sa KERA Hoa Boseoun isses o nza 155 DIES peg HOS gt 3 hos 158 A alee ee Tg vor az BE op za ij END 0000 390 hos 158 D22051 556886 1 5 pora gt Zo 7 a 494 INOUTS A163 40 9 H04 425 INQUTS 00000000 Be OS Bs 292 INGUT3 2Sbezosa SBesas 195 plein Rte lata ca INSUTS eee ag 106 INOUTE E PEERS EE ES pi 1940 22 inoute dia hos PELREAR nza R204 Rg 28 SER 222 7 48V 3 Bloezosa S8cese a gt cna APE T vane auyus s sa 2 2 E 238 589 107 Fri EEES 12 no 5000 o ES
27. 5 1 75 VDC 0 1 to 0 9A Minimum Resolution 0 059 mm 1 432 1 2 phase 2 pass Coil resistance Control method Phase drive Drive voltage Drive current Paper feed pitch The printer includes two sensors to detect the end of the paper the RPE sensor detects paper fed through the rear paper slot the BPR sensor detects paper fed through the bottom paper slot The sensors have the following specifications Table 2 9 RPE and BPE Sensor Specifications Item Specification Type Mechanical contact switch 0 6 to 1 0 mA 5 VD 5 e Paper inside open e No paper closed Electrical rating Switching mode The printer also uses a sensor a contact switch to detect the position of the tractor release lever When friction feeding the switch is OPEN when tractor feeding the switch is CLOSED EPSON LX 300 Technical Overview 2 2 Electronics 2 2 1 Main Board The components of the main board are diagrammed below and explained on the next page CR Motor Serial I F gt 033208 PF Motor Parallel I F G A 1 SLA5125 1C6 1 1 eee ES ehe nn en I RESET IC CS Motor 104 gt l l Option ee AA AA Head Drive 9311 gt Print Head BPE Sensi amp a Counter voltage 5V EEPROM o gt 3 3V Regulator AT93C46 Ec
28. 5 Default Settings continued Item Setting Value 2 Character table Software version Italic PC437 PC850 PC860 PC863 PC865 PC861 BARASCII Abicomp Romang8 ISO Latin 1 PC858 ISO 8859 15 NLSP version Italic PC437 PC850 PC437 Greek PC853 PC855 PC852 PC857 PC864 PC866 PC869 MAZOWIA Code MJK ISO 8859 7 ISO Latin 1T Bulgaria PC774 Estonia ISO 8859 2 PC 866 LAT PC 866UKR PC APTEC PC708 PC720 PCAR 864 PC860 PC865 PC861 PC863 BRASCII Abicomp Romans ISO Latin 1 PC858 ISO 8859 15 PC771 for Italic table International character set Italic U S A Italic France Italic Germany Italic U K Italic Denmark 1 Italic Sweden Italic Italy Italic Spain 1 Manual feed wait time 1 second 1 5 seconds 2 seconds 3 seconds Buzzer OFF ON Auto CR IBM 2380 Plus OFF ON IBM character table Table2 Table1 I F mode Auto Parallel Option Auto I F wait time 10 seconds 30 seconds Parallel I F bidirectional mode OFF ON Packet mode Auto OFF Auto CR IBM 2390 Plus OFF ON A G M IBM 2390 Plus OFF ON EPSON LX 300 Product Basics 1 2 3 Bi D Adjustment 1 3 Accessories Users can perform the bi directional adjustment themselves if they notice jagged characters or misaligned vertical lines Follow these steps Table 1 6 Consumables instructions along with the
29. 9 Norway 10 Denmark2 11 Spain2 12 Latin America EPSON LX 300 Appendix Table 7 33 Bi Directional Commands continued Function Turn 1 inch skip perforation on off Code Parameter SK 02H 00H 00H m1 m1 0 off 1 on Parameters saved all parameters saved Set page length PG 05H 00H 00H p1 p2 m1 m2 p1 0 Continuous paper p2 0 Rear p1 1 CSF p2 0 bin1 p1 2 Manual insertion p2 0 rear Page legth m1 256 m2 0 118mm 1 216inch 648 76 2mm 3inch lt m1 256 m2 lt 4752 558 8mm 22 inch all parameters saved Set Top margin TP 05H 00H 00H p1 p1 m1 m2 p1 0 Continuous paper p2 0 Rear p1 1 CSF p2 0 bin1 p1 2 Manual insertion p2 0 rear Top margin m1 256 m2 0 118mm 1 216inch 36 4 2mm lt m1 256 m2 lt 288 8 5mm 25 4mm 1inch all parameters saved Table 7 33 Bi Directional Commands continued Function Turn Buzzer on off Code Parameter EX 06H 00H 00H 00H 00H 00H 02H m1 m1 0 enable 1 disable Parameters saved all parameters saved Turn IBM emulation Auto CR on off EX 06H 00H 00H 00H 00H 00H 04H m1 m1 0 off 1 on all parameters saved Set starting data month year SD 04H 00H 00H m1 m2 m3 00 lt m1 lt 99 01 lt m2 lt 12 01 lt m3 lt 31 all parameters saved Inquire printer state reply on off ST 01H 00H 01H BDC SP PS CR LF ST lt n
30. Adjust the platen gap or replace documents the ribbon mask if broken Does the ribbon advance when the NO Replace the ribbon advance carriage moves mechanism Are all connectors connected properly to the main board NO Connect them propery Do characters appear jagged or Perform the Bi D Adjustment as misaligned when bi directional NO described in Bidirectional printing is performed Adjustment on page 60 Test the printhead and printhead driver as described in Test Points on page 37 If problems A der An f are found replace the printhead eS O gror YES or main board as needed individual characters It s also possible that the printhead ribbon cable may have worn out Inspect it for damage and replace it if necessary Replace the printer mechanism Possible Problem Y N Solution Testthe PF motor as described in Test Points on page 37 If Does the paper feed motor turn NO it s okay the driver may be defective replace the main board When the power is off can you feed Replace the printer mechanism paper by rotating the platen knob NO or paper loading mechanism manually parts Switch the tractor release lever Do the tractor and paper feed rollers NO Replace the printer mechanism engage and disengage properly Check the page length default setting If incorrect reset it Check the RPE and BPE sensors Are they defective or Does the paper travel the correct improperly connected Replace
31. BE guta typo fa H Seuti815153 ares hos 299 oute Evon fs i BENLBIBISE RS og 97 ES 498 ours 2bezosa Zssss SES Hp oura gt exo LE Sun geos f Tesi O Bura Ben 407 BR gg 08 toy Hugo Boezoen SSss85 Aveo HVDD gt Reiease n23 aoia SER nza 112 leencs aie 18 HEN RT gto A aeeai Ha sengo Spoon ease m R142 5V Ics pee a J a ade scan vg Ass vos Zo Ven ot guias sslece VES R a 010 va eNO END Bores cs 4 15 Zidezosi Sias oct Tae E ES Vee ore 01 3 JE0O v55 gt i BN Bo EN ve 30 40cou eno o0 ES 5 8 feet 5V END 5V bicn VA EN uzazi 2 77 SP T BLM24P2245GPT i aia 1 CERBER GNO PElnotton nza Beine BBiooe ra age CNS BPE O Ta Zao 2 5 eno o 2 4 cer 2 4 POFF 1P112 O Zo Z sit Bae Tra O ya 39 w 5V KX gaoa VH 22 1P107 48V PGlcopy model a25 cet cme US 18 er 830 Ton 2984 Temes 18 e99 E a PS cNn7 Peo Ze scat aa a GNO O 24 cs Tero TP108 GND oop Sap sega deoe 293 a ges EB ce Zo EREA o GND GND 1 D31 155355 TPHA Mm exo er pete ESEN HTA cn15 35v 0 100 35 CN14 s RBG 20K 028 es noL OE 20 cs hoLo 201 Bani 5 o 20 5v g223 PREPRE ER a Eorum a z 1012 2 esa O os E msn ui Model LX 300 a Messen oft hour CS XA O CS XA 7 gt z02 28K3233 5 a Lgm ia o o 28s6 3 face 1010 05 80 08 8 151 Board C294MAIN BOARD csxe oO Z 4 cue tev ICAA 3 3V eo OE H hne IR O ERS d ar YA a a gee cat SPO sp IR omis 208k Pr a A a 2 Toy NA eso essa el Lot des 204 168 300 17an ev 10 A M a
32. ESC 7 ESC T Print Data as Characters ESC 4 ESC Bit image Bit Image ESC K ESC L ESC Y ESC Z Bar code Set up Bar code ESC f Transfer Bar code ESC p Download Download ESC only Draft mode Line Spacing ESC3 Carriage Return CR Reverse Line Feed ESC Page format Page Length ESC C ESC CO Left Right Margin ESC X Skip Over Perforation ESC N ESC O Set TOF ESC 4 Print position motion Horizontal Print Position ESC d Initialize Tab Position ESCR Tab Horizontally ESC D HT Tab Vertically ESC B VT Advance paper ESC J EPSON LX 300 Appendix 7 4 3 Bi Directional Commands AU Reply printer ID Reply printer ID ESC SOH EJL SP ID CR LF The printer sends the following ID string in reply to this command Table 7 32 EJLISP ID CR LF MFG EPSON CMD ESCPL2 PRPXL24 BDC MDL LX 300 CLS PRINTER DES EPSON SP LX 300 FF QO Enter Exit Remote Mode m Enter Remote Mode ESC R O8H OOH OOH JREMOTE1 E Exit Remote Mode ESC NUL 00H 00H U Remote Commands XXInL nH 00H m mx XX nL nH 01H ml mx E Change Printer Settings E Reply Printer Settings XX is a string of 2 ASCII characters defining a feature of the command Following nL nH is a two byte hexadecimal value that denotes the length of the 00H and mll mx parameters Last m1 mx parameters are used to describe the detailed c
33. HHH If the characters are not aligned use the Left and Right arrow keys to change the adjustment value and bring the characters into alignment Press the Space bar to print another adjustment pattern and check the results 13 After making sure the characters are aligned use the Up and Down 11 Press the Space bar to print the first adjustment pattern in Mode 0 ALOY keys to switch to Mode 1 Repeat the adjustment following steps After a delay of several seconds the printer prints a pattern similar to the 11 and 12 in this mode then switch to Mode 4 and repeat the adjustment following again 14 After performing the adjustment in all three modes press Escape several Mode O VRO 2 times to exit the adjustment program C a adj12 E Do not attempt to use the adjustment program to perform any operations except those described above E Using the control panel to clear the EEPROM does not change the Bi D setting 63 EPSON LX 300 Adjustments EPSON LX 300 Maintenance 6 1 Overview After disassembling the printer follow the steps below to clean and lubricate it as needed E Unplug the AC cable before performing maintenance WARNING 6 1 1 Cleaning Use a neutral detergent or diluted alcohol to clean the outside of the case Vacuum dust or small pieces of paper from the inside of the printer Never use thinner tricren or ketone solvent as it may damage plastic or rubber parts
34. In the default setting mode 13 SLCT 28 Out a level when the printer is Q ERROR signal is active low level under the conditions below oe 14 AFXT 30 In Not used NE Inthe condition of a paper out error Br This si l ti Ise initiali E inthe condition of a release lever error 31 INIT 30 In ee SA ree ee m PE signal is active high level during a paper out error ones 5 ar This signal s low level means the printer Table 7 25 Pin Signals is in an error state Return 36 SLIN 30 In Not used a In Qut Functional Description 18 Logic H i Out This line is pulled up to 5V through g 3 9 kQ resister 1 STROBE 19 fay SHORE Biles Inpro ders te Talend al This line is pulled up to 5V through falling edge of the signal 35 5V Out 1 0 kQ resister Parallel input data to the printer z 2 DATA1 20 In bit0 LSB 17 Chassis Chassis GND 16 33 3 DATA2 21 In bit1 19 30 GND Signal GND f DATAS 22 WA bie 15 34 NC Not connected 5 DATA4 23 In bit3 6 DATA5 24 In bit4 NOTE In Out indicates the direction of signal flow from the printer s point of view 7 DATA6 25 In bit5 8 DATA7 26 In bit6 9 DATA8 27 In bit7 MSB EPSON LX 300 Appendix 7 3 2 Parallel Interface Reverse Channel Table 7 28 Pin Signals AU Transmission mode IEEE 1284 nibble mode L Adaptable connector See 7 3 1 Parallel Interface Forward Channel Signal Name In
35. K 125V or 250V N 8 3 HZSh2A 2 081 Spa 2 DTA115E a IA CNA S Oe R68 R69 Ag 064 1 H E K TLP621 2 D4 GB 10K SE 2031 GMB01 BT 100 120VAC i 10K RB8 Model LX 300 Board C294BSB BOARD Rev A Sheet 1 of 1 A B G D E F G Sa 1 2W Ti 051 MN PT 54 ya FSHO4A10 T gt 35V 0 BA DB1 R28 35V S1VBAGO cit 300K GP L 56 Z 200v 1 20 a oP C15 1000p PSC 2 OKV R18 c51 R92 0 55 1 2W L51 470UH PO 300K 3300uZ2 7 Ria xk A yi gt e a ho 5V 0 3A m Tre 1 28 3 50V HZS5C 3 Am 5v GND 2w T K3233 x 2081 es a des HZS6C 3 39 des ela 1 1E0806 3 01K Ne x 7082 Hes ab 4 1 FG C14 HZS5C 3 446ND INVIN 2 1180804 I 4 z085 IC51 Cpa 054 R51 c3 ca D2 2200p A see NUM2360AD 1000p 470u AK Er J D gt t 11 0806 6 3V 1 2200p 2200p y x 2084 053 Berl m c13 R11 BA HZS5C 3 5 ay R19 20K 4700 510 Not mounted FG 7 eee 5 x 2085 M HZS5B 2 ce Q3 10 a2 R15 0 Au 04408 101 4 510 R16 c12 La eth GKO mis 100u ZZ HZS9A 1 G 25V D52 3 E 4 7K R83 1056 2520 2 42053 cou Ea TOK 220u SS11V 510 R33 ase 10V 087 100K C1815 HZS20 2 R87
36. NLSP versions Appendix 7 4 3 1 Reply Printer Status The printer reports its status every few seconds by sending back one of the five strings shown below BDC SP ST CR LF nn ST lt status code gt mn ER lt error code gt PP lt paper_path gt CD lt printer status codes gt 1G lt nn1 gt lt nn2 gt lt n3 gt lt nnx1 gt lt nnx2 gt lt nnx3 gt TEC lt ii1 gt FF See the following tables to interpret the meaning of the codes Table 7 37 Status Codes In the error state 00 In the busy state 02 In the waiting state 03 In the idle state 04 In the pose state 05 Table 7 38 Error Codes m2 m3 Character table m2 m3 Character table 00H 00H Italic 19H 00H BRASCII 01H 00H PC437 1AH 00H Abicomp 03H 00H PC850 7FH 01H ISO Latin1 07H 00H PC860 23H 00H Roman8 08H 00H PC863 2CH 00H PC858 09H 00H PC865 1DH OFH ISO 8859 15 18H 00H PC861 Table 7 36 saved Parameters 3 NLSP version only m2 m3 Character table m2 m3 Character table 01H 10H PC437 Greek 1CH 00H Code MJK 05H 00H PC853 1DH 07H ISO 8859 7 06H 00H PC855 1FH 00H ISO Latin 1T OAH 00H PC852 20H 00H Bulgaria OBH 00H PC857 21H 00H Hebrew 7 OCH 00H PC862 22H 00H Hebrew 8 ODH 00H PC864 24H 00H PC 774 OEH 00H PC866 25H 00H Estonia OEH 20H PC866
37. OTECT M B 579 SHEET CABLE CR 580 C B P TITE 3X10 F ZN 581 C B S SCREW 590 LEVER RELEASE 650 PRINT HEAD D3910 1 651 LABEL WARNING 102 EPSON LX 300 Appendix 7 8 Exploded Diagrams os lay MN S LI l gt SSX lt Q LX 300 No 01 Rev 01 10202 Figure 7 10 Exploded Diagram 1 103 EPSON LX 300 Appendix LX 300 No 02 Rev 01 10202 Figure 7 11 Exploded Diagram 2 104 EPSON LX 300 Appendix 7 9 Circuit Diagrams The following pages show the circuit diagrams listed below Q C294MAIN Board OU C294PSB Board O C294PSE Board 10 11 12
38. Out Functional Description A Synchronization Refer to the IEEE 1284 specification 1 HostClk 19 Host clock signal AU Handshaking Refer to the IEEE 1284 specification 3 2 DATA1 20 In Parallel input data to the printer AU Signal level IEEE 1284 level 1 device bit0 LSB See 7 3 1 Parallel Interface Forward Channel 3 DATA 21 In biti O Data transmission timing Refer to the IEEE 1284 specification 4 DATA3 22 in bit O Extensibility request The printer responds to the extensibility request A affirmatively when the request is 00H or 004H which means 3 AINA ln bite 00H Request for nibble mode of reverse channel transfer DATAS in Din 04H Request device ID in nibble mode of reverse channel transfer 7 DATA6 25 In bit5 O Device ID The printer sends following device ID string when it is 8 DATA7 26 In bit6 requested 9 DATAS 27 In bit7 MSB m When IEEE1284 4 is enabled 10 PtrClk 28 Out Printer clock signal Table 7 26 i 11 PtrBusy 29 Out Printer busy signal and reverse 00H 4EH DataBit 3 7 channel transfer data bit 3 or 7 MFG EPSON 7 CMD ESCPL2 PRPXL24 BDC D4 pa AckDataReg YA 5 a a os MDL LX 300 DataBit 2 6 ut yA channel transter data CLS PRINTER i DES EPSON SP LX 300 13 Xflag 28 Out X flag signal and reverse channel DataBit 1 5 transfer data bit 1 or 5 m When IEEE1284 4 is disabled 14 HostBusy 30 In Host busy signal Table 7 27 31 INIT 30 In Not used on 32 DataAvail 29 Out Data available signal and reverse CMD ESC
39. PC863 Canadian EPSON Sans serif PC 860 Portuguese Abicomp EPSON Roman Roman 8 French PC 863 Canadian Roman 8 EPSON Sans serif PC437 Greek Abicomp French ISO Latin 1 PC 855 Cyrillic ISOLatin1 PC 865 Nordic PC 858 PC 857 Turkish PC 853 Turkish PC 861 Icelandic ISO 8859 15 PC 869 Greek PC 852 East Europe Code MJK CSFR PC 866 Russian ISO Latin 1T Turkish MAZOWIA Poland PC774 LST 1283 1993 ISO 8859 7 Latin 150 8859 2 Greek PC 866 UKR Ukrania Bulgaria Bulgarian PC 708 Arabic Estonia Estonia PCAR864 Arabic PC 866 LAT Latvian Hebrew 8 PC APTEC Arabic PC 858 PC 720 Arabic PC771 Lithuania Hebrews PC862 Hebrew ISO 8859 15 Not displayed in default setting mode NOTE ESC R command is effective in all the character tables EPSON LX 300 Appendix 7 2 2 Paper Feeding Table 7 17 Release Lever in Tractor Position DO Feeding method Friction feed rear Paper path or feeder Paper or media Push tractor feed rear m Push and Pull tractor feed rear Push tractor feed rear ae Single Pull tractor feed rear bottom sheet and Multi part A Feeder Rear push tractor CSF single bin Option Tl di Kula jongoo KA Pull tractor Option and Roll paper holder Option p AU Paper path Manual insertion Rear in top out Pulltractor teedrear er pha CSF Rear in top out Push Tractor Rear in top out Pull tractor feed bottom Continuous paper Single Pu
40. PL2 PRPXL24 BDC DataBit 0 4 channel transfer data bit 0 or 4 MDL LX 300 36 1284 Active 30 In 1284 active signal CLS PRINTER ee f ae E This line is pulled up to 5V DES EPSONISP LX 300 1 Logic Ont through 3 9 kQ resister EPSON LX 300 Appendix Table 7 28 Pin Signals continued Table 7 29 Pin Signals Signal Name In Out Functional Description Signal Name In Out Functional Description it data 35 5V _ Out This line is pulled up tp 5V 2 TXD Qu Transmit data through 1 0 KQ resister 20 DTR Out as that the printer is ready to receive data 17 Chassis Chassis GND 16 33 me J Signal GND 11 REV Out Connected directly to the DTR signal 19 30 Request to send Always SPACE level when the inter i d on Pulled up to 12V vi 15 34 Nc ir a 4 RTS Out A cla on Pulled up to via In Out indicates the direction of signal flow from the printer s point of view 3 RXD In Receive data 7 Signal GND Signal GND 7 3 3 Serial Interface 1 Chassis GND Chassis GND U Synchronization Asynchronous other NC Not used Not connected AU Signal level ElA 232D MARK logical 1 3V to 25V In Out indicates the direction of signal flow from the printer s point of view SPACE logical 0 3V to 25V Word length Start bit 1 bit Data bit 8 bit Parity bit Odd Even Non Ignore Stop bit 1 bit or more O Baud ra
41. Service Manual TM LX300 EPSON LX 300 Dot Matrix Printer Service Manual EPSON LX 300 Copyright Notice 2000 Epson America Inc 3480 Kilroy Airport Way Long Beach CA 90806 2469 All rights reserved No part of this publication may be reproduced stored in a retrieval system or transmitted in any form or by any means electronic mechanical photocopying recording or otherwise without the written permission of Epson America Inc Epson America Inc assumes no liability for damages resulting from the use of the information contained herein While every precaution has been taken in the preparation of this book Epson America Inc assumes no responsibility for errors and omissions Neither Epson America Inc nor its affiliates shall be liable to the purchaser of this product or third parties for damages losses costs or expenses incurred by the purchaser or third parties as a result of accident misuse or abuse of this product or unauthorized modifications repairs or alterations to this product Epson America Inc shall not be liable for any damages or problems arising from the use of any options or any consumable products other than those designated as Original EPSON Approved Products by Seiko Epson Corporation Trademark Information EPSON and ESCIP are registered trademarks of Seiko Epson Epson Connection is a service mark of Epson America Inc General Notice Other product names used herein a
42. alization is activated by the INT signal negative pulse Purpose E to clear all buffers of data E to cancel the download character definition E to put the printer in stand by mode if no errors occur N to execute Software initialization O Software initialization This initialization is activated by the control code ESC Purpose E to clear the unprinted data E to set the printer s default settings EPSON LX 300 3 1 Overview Follow these steps to troubleshoot the printer 1 Before performing component level troubleshooting check the printer as described in Printer Self Diagnostics on page 33 2 Then turn to Troubleshooting by Printer Symptoms on page 34 as needed for further information If you need to check individual components such as motors sensors or the printhead follow the instructions in Test Points on page 37 3 1 1 Precautions WARNING E Always unplug the printer before servicing Bear in mind that the printhead and motors may be hot F after printing Use the tools specified in chapter 4 when disassembling the printerChapter Lubricate the printer as needed using only the specified oil and grease See Maintenance on page 65 After replacing parts be sure to perform any indicated adjustments Troubleshooting 3 2 Printer Self Diagnostics The printer can provide diagnostic information in two ways O using its LEDs A by printing a self test Refer to the sections be
43. and C294PSE 200 volt model The table below shows the power supply boards input voltage specifications Table 2 11 Input Voltage Specifications Circuit Input voltage Fuse specification C294PSB 99 132VAC ULTSC 2 5A NI C294PSE 198 264VAC HT 1 25A Each power supply board supplies power at two voltage levels as shown below Table 2 12 Output Voltage Output voltage Usage 35 V 5 10 Motor drive 5V 5 Logic circuits Note that the core voltage of the CPU and G A on the main board is actually 3 3 volts This is stepped down from 5 volts using a local regulator built onto the main board EPSON LX 300 Technical Overview 2 2 3 Initialization 2 2 4 Other Special Functions Printer initialization can be performed in the following ways Energy Saving Mode OU Power on initialization This function saves electricity when the printer is in standby mode Normally the PF motor CR motor and CS motor are kept stationary by a holding This initialization is activated by a power on or cold reset command 5 current In energy saving mode this current is turned off remote RS command Purpose MN to initialize the printer mechanism Quiet Mode MH to execute Operator initialization Quiet mode lowers printing temperature When this mode is selected the carriage speed slows to the power down mode speed See Table 2 4 Q Operator initialization Carriage Speed Modes on page 24 This initi
44. aper Feed Rollers Release shaft Turn the paper guide assembly upside down and lubricate the release shaft where it contacts the Paper guide assembly frame 4 places G 26 1 grain of rice Figure 6 6 Paper Release Shaft EPSON LX 300 Maintenance Apply G 26 to the left and right bushings in which the tractor shaft rotates Left TR frame G 26 1 2 grain of rice y Right TR frane l Spur Gear 17 Figure 6 7 Tractor Assembly If you replace the oil pad located under the printhead carriage as shown add oil to it as follows 1 Fill a syringe to 0 30 ml of O 2 2 Apply the oil to the pad Note Be careful not to over or under lubricate the pad The correct amount is 0 28 0 32 cc Figure 6 8 Oil Pad Slide the carriage to the middle of the printer then apply G 26 along the entire front guide rail both on top and underneath where the carriage touches it G 26 40 mm x 2 places Guide rail where the carriage motor hooks onto the base frame as shown G 26 1 2 grain of rice x 2 Figure 6 10 Carriage Motor EPSON LX 300 Maintenance Apply G 26 to the gear shaft shown at left G 26 1 2 grain of rice Figure 6 11 Combination Gear 17 5 27 Apply G 26 to the point where the grounding spring attaches to the platen shaft G 26 1 grain of rice Apply G 26 to the middle of the f platen drive gear as shown EPSON LX 300
45. at exceed the limits established by the FCC for this equipment It is the responsibility of the user to obtain and use a shielded equipment interface cable with this device If this equipment has more than one interface connector do not leave cables connected to unused interfaces Changes or modifications not expressly approved by the manufacturer could void the user s authority to operate the printer For Canadian Users This Class B digital apparatus meets all requirements of the Canadian Interface Causing Equipment Regulations Cet appareil num rique de la classe B respecte toutes les exigences du Reglement sur le materiel brouilleur du Canada EPSON LX 300 Guide to Using This Manual Before servicing the EPSON LX 300 read the precautions on the following page Then turn to one of these chapters Chapter 1 Chapter 2 Chapter 3 Chapter 4 Chapter 5 Chapter 6 Chapter 7 Product Basics Lists the main features of the product and describes basic control panel operations Technical Overview Explains how the product works Troubleshooting Tells how to identify and correct common problems Disassembly and Assembly Provides step by step instructions for disassembling the product Adjustments Provides instructions for adjusting the platen gap and bi directional print alignment Maintenance Describes routine maintenance procedures Appendix Provides additional information for reference m De
46. ation 1 original 4 copies Paper guide cover Printer cover Parallel interface Tractor Paper supports Product Basics Paper guide Tractor release lever Paper thickness Paper tension unit Power cord Power switch Figure 1 1 EPSON LX 300 Printer Parts CONTINUED 13 EPSON LX 300 Product Basics 1 2 Control Panel Operation 1 2 1 1 Switches Operation in normal mode 1 2 1 Control Panel The control panel includes four switches and four LEDs Button Function Table 1 1 Operation in Normal Mode e Pauses printing Font Indicator LEDs Pause e Enables Micro Adjust and Font selection held down for 3 seconds Tear Off Tear Off LF FF Load Paper l e Loads or ejects paper Load Eject e Executes micro feed forward 0 118 mm or 1 216 inch when Pause this function is enabled Draft Draf Condensed e Executes line feed pressed momentarily Roman es KG eS E LF FF e Executes form feed held down for 3 seconds Executes micro feed backward 0 118 mm or 1 216 inch when Roman Condensed micro aaju 3 es o Br Font pajas la this function is enabled Sans serif e Advances continuous paper to the Tear off
47. ce on page 65 E After replacing parts be sure to perform any indicated adjustments EPSON LX 300 4 2 Disassembly Follow the steps below to disassemble the printer 4 2 1 Preparation Before disassmbling the printer remove the platen knob cover assembly tractor unit and paper eject unit Remove the color upgrade kit if it s installed 4 2 2 Printhead Removal Make sure the printer is unplugged before removing the printhead 1 Remove 1 screw CPB 3x14 securing the printhead to the carriage 2 Lift the printhead a little Unhook the ribbon cable from the carriage 3 Remove the ribbon cable from the printhead e After putting the printhead back in or replacing it perform the eee platen gap adjustment on page 59 Disassembly and Assembly Printhead CPB 3x14 Carriage Ribbon cable Figure 4 1 Printhead Removal 42 EPSON LX 300 Disassembly and Assembly 4 2 3 Upper Housing Removal 1 Set the tractor release lever forward to tractor feed After reassembly turn on the printer and make sure the LED isible th h the holes in th housing 2 Remove 4 screws CBP 3x10 securing the upper housing to the lower O A A housing Upper Housing 3 Remove the upper housing Upper Housing CPB 3x10 LED Control Panel dis04 CPB 3x10
48. distance when loading or feeding NO or reconnect the sensors as needed Is the sensor for the release lever defective or improperly connected Replace or reconnect it as needed EPSON LX 300 Table 3 6 Control Panel Does Not Operate Possible Problem Is the control panel harness connected properly Y N NO Solution Connect it properly Replace the control panel Table 3 7 Self Test is Okay But Online Printing is Abnormal Check Point Y N Solution Reset any incorrect settings or Are the default settings correct NO use the EEPROM clear to reset all setting to the factory default Connect it properly or replace it Is the interface connected properly NO if you suspect it of being damaged Is the firmware the latest version NO Replace the firmware Reinstall the printer software Replace the main board Troubleshooting 3 4 Test Points If you need to check the printhead the printhead driver or one of the motors or sensors follow the instructions in this section VAN Make sure the printer is unplugged before testing 3 4 1 Printhead Check Follow these steps to check the printhead coils 1 Set the multimeter to measure resistance 2 Connect one of the probes to one of the points C as shown below 3 Connect the other probe to each of the other points 1 through 9 The meter should read 33 3 3 30
49. e serial interface is not selected it sends an XOFF signal and then sets the DTR signal to MARK When the printer is initialized or returned to the idle state the parallel interface goes into the ready state and the serial interface sends an XON signal and then sets DTR to SPACE Interrupt signals such as INIT on the parallel interface are not effective if an interface is not selected 7 3 5 Preventing Data Transfer Time out Generally host computers abandon data transmission when a peripheral is busy for a certain length of time To prevent this the printer begins receiving data slowly several bytes per minute when the space in the input buffer drops to several hundred bytes If the input buffer fills up completely the printer enters the busy state 7 3 6 1EEE1284 4 protocol The packet protocol described by IEEE1284 4 is supported on the parallel interface Two function modes of IEEE1284 4 protocol Off and Auto are available the desired mode is selected as a default setting See Default Setting Mode on page 16 O Auto Communication is carried out in the conventional mode until a magic string 1284 4 synchronous command is received This initiates communication in IEEE1284 4 packet mode a Off Communication is carried out in the conventional mode Magic strings 1284 4 synchronous commands are discarded NOTE The packet protocol of IEEE1284 4 allows a device to carry on multiple exchanges or conversa
50. ees 29 2 2 3 IMitlAliZAtON cis 30 2 2 4 Other Special Functions 00 00 2222 2c cceeeeeeeeeeeeceeceeeeeeeeeteteeseenneeaeees 30 31 OVORVICW aiii ds 33 AT PICHA MS A E 33 3 2 Printer Self Diagnostics nnnnsnsnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnennnnnn 33 3 2 indicator LEDS ui ni ana 33 322 SOR TOS te vicki 2 er 34 3 3 Troubleshooting by Printer Symptoms uursunnssnnnnennnnnnnnnnnnnnnnnnnn 34 BA TOS Points nn An EEEE AE EA AAA A 37 341 Printhead CHECK 4 Nessie es 37 3 42 Motor Checks cta ee een 38 3 4 3 Sensor Gheck 2 3 2 AA eisen 38 3 4 4 Printhead Driver Check ooccccnccccccnccccnnccnnnnoccnnnnancnnnacnnnnancnnninons 38 Chapter 4 Disassembly and Assembly SS E E ERRFREEPEEBEERSERTESTEHEFERTEEFESEREGEESPSTETEFEREFERT 41 Ad 1 Preeautions 0 een nee See teas 41 AN2 A 41 4 2 Disassembly iii ao 42 42 ASPREDARATION terco ta td ee e ah 42 4 2 2 Printhead Removal Aaaa 42 4 2 3 Upper Housing Removal ccccceeeececeee cee ee eee eeeeeeeeeeeeeeeeees 43 4 2 4 Printer Mechanism Removal ccccccececeeeeeeeeeeeeeeeeeeeeeeeees 44 4 2 5 Control Panel Board Removal ccecceceeeeeeseeeeeneeateeeeees 45 4 2 6 C294MAIN Board Removal c ceeceeeeeeeeeeeeeeesecaecaeeeeeees 45 4 2 7 Power Supply Board Removal cccccceeeeeeeeeeeeeeceeaeeeeeees 46 4 2 8 Printer Mechanism Disassembly soneca 47 4 2 8 1 Carriage CR Motor Removal
51. er housing 5 Remove the power supply board CN8 Power Switch CBP 3x10 CN1 CBP 3x10 Main Board CPB 3x10 dis09 Figure 4 6 C294MAIN Board Removal CBP 3x10 Power Supply Board CBP 3x10 disl0 Figure 4 7 Power Supply Board Removal EPSON LX 300 4 2 8 Printer Mechanism Disassembly Follow the steps below to disassemble the printer mechanism START 4 2 8 1 Carriage CR Motor Removal 4 2 8 3 Carriage Removal 4 2 8 4 Ribbon Feed Mechanism 4 2 8 5 BPE and RPE Sensor Removal 4 2 8 6 Home Position HP Sensor 4 2 8 5 BPE and RPE Sensor Removal 4 2 8 7 Platen Gap PG Sensor Removal 4 2 8 9 Paper Feed PF Motor Removal 4 2 8 2 Platen Removal 4 2 8 8 Removing the Tractor Release Lever y 4 2 8 11 Paper Guide Removal Figure 4 8 Printer Mechanism Disassembly Disassembly and Assembly 4 2 8 1 Carriage CR Motor Removal Preparation Remove the printer mechanism see Printer Mechanism Removal on page 44 1 Remove the tension spring to release tension from the timing belt 2 Remove the timing belt from the pulley of the CR motor 3 Rotate the CR motor to remove it Timing Belt Tension Spring 8 10 CR Motor Base F
52. er mechanism over 2 Remove any tape securing the RPE and BPE sensor cables to the metal frame then free them from the hook on the frame 3 Release the locking tab securing the paper guide to the metal frame by pushing it inward Locking tab Figure 4 23 Releasing the Locking Tab 54 EPSON LX 300 4 Slide the paper guide to the left to free the six hooks that hold it on the frame Two of the hooks are shown below Hooks Metal Frame dis24 Figure 4 24 Paper Guide Removal 5 Turn the printer mechanism right side up Remove the paper guide along with its release shaft by lifting it out of the frame Disassembly and Assembly EPSON LX 300 Disassembly and Assembly EPSON LX 300 Adjustments 5 1 Platen Gap Adjustment Perform the platen gap adjustment if you a a a a a a replace the printhead replace the carriage remove the carriage guide shaft remove a parallelism adjust bushing notice that printing is too light notice the ink ribbon getting jammed too often Follow these steps to perform the adjustment 1 2 Remove the upper housing See Upper Housing Removal on page 43 Remove the printhead see Printhead Removal on page 42 and then remove the ribbon mask Insert a narrow screwdriver down into each crease or fold in the ribbon mask to release it from the carriage then lift the ribbon mask out of the carria
53. g or replacing printed circuit boards and other components To protect sensitive microprocessors and circuitry use static discharge equipment such as anti static wrist straps when accessing internal components Always replace malfunctioning components with EPSON components Introduction of second source ICs or other non approved components may damage the product and void any applicable EPSON warranty vii EPSON LX 300 viii Contents Chapter 1 Product Basics WT Features ia E 13 1 2 Control Panel Operation oooococccccccccnnnnnnnnnnconnconcnnccnnnnnnnnnnnnnnnnnnnnnnnnns 14 4 24 GontrolPaneh sc ci essentiell 14 LS CAS A Ae Stee ayes 14 1 2 1 2 Indicator Lights LEDS WA Kaa 15 HA OO 15 1 2 2 Default Setting Mode ooonoocccccnnnocccccnoconcccnnnnoncccnnn anno irainaren 16 1 23 BED Adjustment ii Hr spe 17 ANA A 17 Chapter 2 Technical Overview Chapter 3 Troubleshooting 2 1 Printer Mechanism iii anacr nico nde nad 21 2 44 Printhead AE AA aan een ae vn rn 22 2 1 2 Carriage Mechanist mia kik kawai 23 2 1 3 Color Ribbon Mechanism Optional wwwwwwmmmmmamwmmwmawa 25 2 1 4 Platen Gap Adjustment Mechanism uuressssseesessnnenneennn nen 26 2 1 5 Paper Feed Mechanism wwwwwwwwmwwawawanewawwwwwi mwaa 27 2 2 Electronics socio ii 28 2 2 1 Main Board a en tdt dear and 28 2 2 2 Power Supply Board ccccccecceeeeeeeeeeeccaeeeeeeeeeeeeeseesessensan
54. ge Reinstall the printhead Slide the carriage all the way to the left Insert a 0 45 mm thickness gauge feeler gauge between the printhead and the platen Set the blue platen gap PG lever to the 0 position toward the rear of the printer Check that the printhead applies just enough pressure to keep the thickness gauge from falling down by its own weight Refer to the following table Table 5 1 Adjustment Guidelines Ideal Adjustment Borderline Adjustment At 0 44 mm gauge falls down by its own weight 0 455 0 015 2 u At 0 47 mm gauge is held in place If the setting is incorrect move the PG lever all the way forward then adjust the left parallelism adjustment bushing Set the PG lever to the 0 position again and retest the adjustment Once the adjustment is correct on the left side of the printer slide the carriage all the way to the right Repeat the adjustment on the right side of the printer follow steps 5 through 7 but make the adjustment on the right parallelism bushing Slide the carriage to the middle of the printer and check the adjustment If it s incorrect you ll have to repeat the adjustment on both the left and right sides of the printer EPSON LX 300 Adjustments 5 2 Bidirectional Adjustment You see this screen AE Li Audit Al T 5 TE Perform the Bi D adjustment if you QU replace the main board QU replace the carriage motor O replace the entire p
55. iage slows to avoid breaking off printhead pins When printing blank areas of the page the carriage speeds up The table on the following page indicates the various speeds at which the carriage travels EPSON LX 300 Technical Overview The following table indicates the various carriage speed modes Table 2 4 Carriage Speed Modes Carriage CR drive o Current limit A phase Adjacent Head drive Carriage High or speed frequenc Printing i dot freguenc Printing speed speed mods low de Hz y mode High Normal Low resolution THz y 9 sp at power speed speed speed speed dpil down printing Color 2 2 0 79 0 79 0 70 0 70 0 70 i A 3600 45 1350 High speed draft c high BW 2 2 0 70 0 59 0 59 0 59 0 59 10cpi Color 2 2 0 79 0 79 0 70 0 70 0 70 i B 3375 48 1350 High speed draft E high BW 2 2 0 70 0 59 0 59 0 59 0 59 12cpi High speed draft 15cpi Color 2 2 0 79 0 79 0 70 0 70 0 70 C 2700 60 1350 Draft 10cpi F high Bit image 60 dpi BW 2 2 0 70 0 59 0 59 0 59 0 59 Draft 12cpi Color 2 2 0 79 0 79 0 70 0 70 0 70 1440 21 14286 High speed draft D 2250 17cpi F high BW 2 2 0 70 0 59 0 59 0 59 0 59 72 1350 Bit image 72 dpi Color 2 2 0 79 0 79 0 70 0 70 0 70 80 1200 Bit image 80 dpi High speed draft BW 1 2 0 65 0 65 0 59 0 59 0 59 90 1350 E Draft 15cpi Bit image 90 dpi Draft 20 17cpi F 1350 Both 1 2 0 65 0 65 0 59 0 59 0 59 120 1350 NLO 10cpi low Bit image 120 dpi G 1125 Both 1 2
56. in 1 removable capacity 5mm quantity of paper N A O9NANA Manual feed rear capacity N A quantity of paper N A OCNANA Tractor rear capacity N A quantity of paper N A TEC 06 9pin SIDM EPSON LX 300 Appendix 7 5 Paper Specifications Table 7 43 Cut Sheet multi part The following tables provide specifications for the kinds of paper that can be used with this printer Width inch 3 9 10 1 A mm 100 257 Table 7 42 Cut Sheet single sheet not multi part mn Manual insertion CSF single bin Length a es on Minimum Maximum Minimum Maximum Copies 1 original 4 copies inch 3 9 10 1 7 2 8 5 Width Total inch 0 0047 0 015 mm 100 257 182 216 gt Thickness mm 0 12 0 39 inch 3 9 14 3 10 1 14 0 i Length an mm 100 364 257 356 eig g m2 52 90 one sheet of Ib 14 24 Thickness inch 0 0025 0 0055 0 0028 0 0055 multipart mm 0 065 0 14 0 07 0 14 ae Plain or recycled paper g m 52 90 64 90 y Not curled folded or crumpled Weie ia 14 24 18 24 Jointing Glue strip on top or side of form li a ed dae ae led bes lees en NOTE Printing on recycled paper is available only under normal Quality erate Not Se cur ed Snou a not 9e curea temperature and humidity conditions folded or crumpled folded or crumpled NOTE Printing on recycled paper is available only under normal temperature and humidity conditions
57. ine and chassis 500 VDC AC 1000 Vrms 1 min or AC 1200 Vrms 1 sec between AC line and chassis E Dielectric strength QU 230 V version Rated voltage range AC 220 to 240 V AC 198 to 264 V Rated frequency range 50 to 60 Hz Input voltage range Input frequency range 49 5 to 60 5 Hz 0 3 A max 0 7 A Power consumption approx 23 W ISO IEC10561 Letter pattern Rated current Insulation resistance 10MQ min between AC line and chassis 500 VDC AC 1500 Vrms 1 min between AC line and chassis m Dielectric strength 7 2 4 Environmental Condition U Temperature 5 to 35 C operating 15 to 25 C operating 30 to 60 C non operating U Humidity 10 to 80 RH operating 30 to 60 RH operating 0 to 85 RH non operating O Resistance to shock 1 G within 1ms operating 2 G within 2ms non operating O Resistance to vibration 0 25 G 10 to 55 Hz operating 0 50 G 10 to 55 Hz non operating 1 without condensation 2 printing on multipart paper envelopes cards or labels 3 without shipping container 7 2 5 Reliability O Total print volume 12 million lines except printhead O MTBF 6000 POH UA Printhead life 400 million strokes pin Black 100 million strokes pin Color 7 2 6 Ribbon Cartridge A Type Fabric Color Black Ribbon life 3 million characters Draft 10 cpi 14 dots character A Type Fabric Color Black Magenta Cyan and Yellow Ribbon life
58. ion Table 7 14 Resolution Horizontal density Vertical density Printing mode Adjacent dot print Printing mode iras pitch nn res High speed draft 10 80 300 12 96 337 15 120 337 High speed draft 17 137 321 condensed an ieo 306 Draft 10 80 225 12 96 270 15 120 225 Draft condensed 17 137 191 20 160 225 Draft emphasized 10 80 112 dpi dpi High speed draft 90 72 No Draft 120 72 No Draft condensed 240 72 No Draft emphasized 120 72 Yes NLO 240 144 No Bit image 60 72 80 90 or 120 72 Yes 120 or 240 72 No O Control code ESC P and IBM 2380 Plus emulation Refer to Control Codes on page 90 EPSON LX 300 Appendix A Character tables A International character sets 13 countries NW Standard version 13 character table rine ee 1 Soa ans Italic table PC437 US Standard Europe Italy Spain 1 I PC850 Multilingual PC860 Portuguese Norway Denmark Spain 2 PC863 Canadian French PC865 Nordic Latin Am ric PC861 Icelandic BRASCII en j a 8 NOTE The international and legal characters are the following Aun 12 codes ISO 8859 15 23H 24H 40H 5BH 5CH 5DH 5EH 60H 7BH 7CH 7DH m NLSP version 38 character tables 7EH Italic table PC437 US Standard Europe PC850 Multilingual PC437 Greek U Typeface bit map fonts PC853 Turkish PC855 Cyrillic EPSON Draft 10cpi 12cpi 15cpi PC852 East Europe PC857 Turkish EPSON R
59. is See Table 3 2 on page 35 most likely with the printer itself continue on to the next section to take O Fatal error all LEDs blinking further troubleshooting steps See Table 3 3 on page 35 O Self test doesn t print correctly faint or badly printed characters See Table 3 4 on page 36 O Paper doesn t feed properly See Table 3 5 on page 36 UA Control panel doesn t work properly switches or LEDs don t work See Table 3 6 on page 37 O Self test okay but online printing is abnormal See Table 3 7 on page 37 EPSON LX 300 Troubleshooting Table 3 2 No Power Possible Problem Is a fuse on the power supply board blown out Y N YES Solution With the printer off disconnect the power supply from CN8 on the main board Replace the fuse and turn the printer back on If the fuse blows again replace the power supply board If the fuse doesn t blow check for problems with the printhead printhead driver transistors PF motor and CR motor See Test Points on page 37 If these components check out okay replace the main board Table 3 3 Fatal Error Are connectors connected to the Possible Problem Y N Solution Check to make sure the carriage motor harness is connected properly to CN10 on the main board If that s not the problem LA Basel carriage move NO test the CR motor and replace it if necessary See Test Points on page 37 Otherwise replace the main board Make
60. lect color ESC r Bar code Bar code ESC B Production EEPROM write etc ESC Define Unit ESC U Horizontal Print Position ESC ESCY Vertical Print Position ESC V ESC v Tab Horizontally ESC D HT Tab Vertically ESC B VT Advance paper ESC J Font selection Typeface ESC k ESC x ESC y Pitch ESC P ESC M ESC g ESC p Italic Font ESC 4 ESC 5 Bold Font ESC E ESC F Master Select ESC EPSON LX 300 Appendix Table 7 31 IBM 2390 Plus emulation 7 4 2 IBM 2390 Plus Emulation Table 7 31 IBM 2390 Plus emulation Classification Operation Command General Operation Nop NUL DC3 Off Line ESC j Buzzer BEL Cancellation CAN Select Deselect DC1 ESC O Initialize Printer ESC K Unidirectional Printing ESC U Select Auto Sheet Feeder ESC F Paper feeding Form Feed FF Line Feed LE ESC5 Auto Line Feed ESC A ESC 0 ESC 1 ESC 2 Classification Operation Command Font selection Pitch DC 2 ESC P ESC Bold Font ESC E ESC F Master Select ESC Print Quality ESC d Select Font and Pitch ESC I Font enhancement Double Width DC4 SO ESC SO ESC W Enlarge and Life Space ESC Condensed SI ESC SI Double Strike ESC G ESC H Super Subscript ESC T ESCS Underline ESC Line Score ESC_ Spacing Back Space BS Space SP Define Unit ESC Character handling Character Table ESC 6
61. ll Tractor Rear or bottom in top out sheet and Multi part Label O Line spacing 4 23 mm 1 6 inch or programmable ee in increments of 0 118 mm 1 216 inch O Feed speed 4 23 mm 1 6 inch feed 88 msec ap aper thickness lever Continuous feed 0 76 MPS m sec p The paper thickness lever must be set at the proper position as shown 3 0 IPS inches sec below A Input Data Buffer 8 Kbyte Table 7 18 Paper Thickness Lever O Release lever The release lever must be set according to the following tables Paper thickness inch Table 7 16 Release Lever in Friction Position Minimum Maximum E 0 0 0024 0 0071 0 06 to 0 18 Paper path or feeder Paper or media 1 0 0071 0 0102 0 18 to 0 26 Lever position Paper thickness mm Manual insertion rear Cut sheet Single sheet and Multi part 2 0 0102 0 0130 0 26 to 0 33 Envelope 3 0 0130 0 0154 0 33 to 0 39 CSF single bin Cut sheet Single sheet 4 0 0154 0 0205 0 39 to 0 52 Roll paper holder rear Roll paper EPSON LX 300 Appendix 7 2 3 Electrical Specification QA 120 V version AC 120V AC 99 to 132 V Rated frequency range 50 to 60 Hz E Rated voltage Input voltage range Input frequency range 49 5 to 60 5 Hz 0 6 A max 1 4 A Power consumption approx 23 W ISO IEC 10561 Letter pattern Rated current Insulation resistance 10MQ min between AC l
62. low to test the printer 3 2 1 Indicator LEDs The LEDs display the printer s condition as shown below Table 3 1 Indicator LEDs Printer Condition Pause Paper Out Font LEDs 2 Beeper Pause ON Paper Out Error ON ON Three beeps Release Lever Error ON Three beeps Paper Eject Warning ON BLINKS Micro Adjust BLINKS Tear Off BLINK Fatal Error BLINKS BLINKS BLINK The release lever error occurs when the wrong release lever position is selected For ekample if you change the release lever setting after the printer has already started feeding paper this error will occur A fatal error can occur if O carriage movement is impeded QU the power supply voltage is abnormal O other hardware problems exist 33 EPSON LX 300 Troubleshooting 3 2 2 Self Test 3 3 Troubleshooting by Printer Symptoms To perform a self test make sure paper is loaded in the printer and positioned in the TOF position Then hold down the LF FF button while turning the printer on This prints a self test in draft mode Find the printer s symptom below and check the referenced table on the following pages i RR Q No power the printer doesn t operate and the LEDs don t come on A series of characters prints line by line If it prints correctly the problem may lie with the host computer or printer software If it fails to print the problem
63. m or more BM Bottom Margin 4 2 mm or more NOTE The maximum horizontal printable area is 203 2mm EPSON LX 300 Appendix A Roll paper Printable Area Figure 7 5 Printable Area for Roll Paper Table 7 22 Printable Area for Roll Paper PW Width Refer to Paper Specifications on page 96 PL Length Refer to Paper Specifications on page 96 LM Left Margin 3 mm or more RM Right Margin 3 mm or more TM Top Margin 4 2 mm or more BM Bottom Margin 4 2 mm or more EPSON LX 300 Appendix 7 3 Interface Specifications The LX 300 has bi directional 8 bit parallel and serial interfaces An optional interface board is not supported on this model 7 3 1 Parallel Interface Forward Channel U Transmission mode 8 bit parallel IEEE 1284 compatibility mode Adaptable connector 57 30360 Amphenol or equivalent Synchronization STROBE pulse Handshaking BUSY and ACKLG signals Signal level TTL compatible IEEE 1284 level 1 device a a a a Table 7 23 Electrical Characteristics DATA n DATA n 1 DATA STROBE t setup BUSY t ready busy ACKNLG 7 haf 7 t reply tack tnbusy Figure 7 6 Data Transmitting Timing Table 7 24 Min and Max Times for Data Transmission Signals 1 0 Voltage Current Capacitance 0 32 when Vo 2 4V to Output 0 5 to 5 5 V 12 mA when Vo 0 8 V 50 pF 0 32 mA when V
64. m the Bi D adjustment on REQUIRED page 60 Left frame Combination gear 51 16 2 Be sure to fit the carriage correctly onto the front guide rail the front most part of the metal frame Part of the carriage goes over the rail and part of it goes under Base frame disi2 Figure 4 15 Ribbon Feed Mechanism Disassembly EPSON LX 300 Disassembly and Assembly 4 2 8 5 BPE and RPE Sensor Removal 4 2 8 6 Home Position HP Sensor Removal Preparation 1 Release the 2 hooks of the HP sensor securing it to the base frame and remove the sensor Remove the printer mechanism see Printer Mechanism Removal on page 44 2 Disconnect the harness from the sensor black 1 Turn the printer mechanism over 2 Loosen the wires to the BPE and RPE sensors Untape them as necessary and free them from the hook on the metal frame 3 Release the hook securing the BPE sensor to the frame see figure below HP sensor black RPE sensor white BPE sensor yellow Push down on hook to release it Base frame Figure 4 17 HP Sensor Removal Paper guide dis18 Figure 4 16 BPE RPE Sensor Removal 4 Remove the BPE sensor Push in on the sensor s actuator so that it clears the frame when removing 5 Disconnect the cable from the BPE sensor yellow 6 To remove the RPE sensor unhook i
65. n PW 257 mm 24 mm or more 24 mm or more TM Top Margin 4 2 mm or more 4 2 mm or more BM Bottom Margin 4 2 mm or more 4 2 mm or more 5 NOTE The maximum horizontal printable area is 203 2 mm Printable Area PL BM Figure 7 2 Printable Area for Cut Sheets EPSON LX 300 Appendix L Envelopes LM RM TM Printable Area BM Figure 7 3 Printable Area for Envelopes Table 7 20 Printable Area for Envelop Envelope Printable Area PW Width Refer to Paper Specifications on page 96 PL Length Refer to Paper Specifications on page 96 LM Left Margin 3 mm or more RM Right Margin 3 mm or more TM Top Margin 4 2 mm or more BM Bottom Margin 4 2 mm or more NOTE The maximum horizontal printable area is 203 2mm UA Continuous paper PW LM RM O O O O o O TM O O O O o Printable Area o PL O O O O Oo o o I O BM Far Perforation Oo O O Figure 7 4 Printable Area for Continuous Paper Table 7 21 Printable Area for Continuous Paper PW Width Refer to Paper Specifications on page 96 PL Length Refer to Paper Specifications on page 96 LM Left Margin When PW lt 254mm 13 mm or more When PW 254 mm 24mm or more RM Right Margin When PW lt 254mm 13 mm or more When PW 254 mm 24mm or more TM Top Margin 4 2 m
66. n gt Sie FF Echo parameters 22 nL nH 01H lt chr str gt BDC SP PS CR LF lt chr str gt FF Turn unidirectional mode on off PD 02H 00H 00H m1 m1 0 Bi d 1 Uni d all parameters saved Inquire starting date month year SD 01H 00H 01H BDC SP PS CR LF SD lt nn1 gt lt nn2 gt lt nn3 gt FF Turn auto tear off on off TO 02H 00H 00H m1 m1 0 off 1 on all parameters saved Turn auto line feed on off LF 02H 00H 00H m1 m1 0 off 1 on all parameters saved Select control language PM 02H 00H 00H m1 m1 0 ESC P 2 IBM 238x Plus emulation all parameters saved Inquire total printing lines power on hours TL 01H 00H 01H BDC SP PS CR LF TL TPL lt nnnnnnnn2 gt 2 TPH lt nnnn3 gt TPR lt nnnnnnnn4 gt ue FF Turn printer state reply on off ST 02H 00H 00H m1 m1 0 1 2 3 Turn Slash zero on off EX 06H 00H 00H 00H 00H 00H 01H m1 m1 0 off 1 on all parameters saved The following tables referenced above provide additional information about certain saved parameters Table 7 34 Saved Parameters 1 m1 set by AT CT m2 set by AT m3 set by AT 1 All parameters that can be set EPSON LX 300 Table 7 35 Saved Parameters 2 Std and
67. oman 10cpi 12cpi 15cpi Proportional PC866 Russian EPSON Sans serif 10cpi 12cpi 15cpi Proportional PC869 Greek MAZOWIA Poland EPSON OCR B 10cpi Code MJK CSFR ISO 8859 7 Latin Greek y ISO Latin 1T Turkish Bulgaria Bulgarian Not displayed in default setting mode PC 774 LST 1283 1993 Estonia Estonia O Barcodes ISO 8859 2 PC 866 LAT Latvian PC 866 UKR Ukrania PC860 Portuguese EAN 13 EAN 8 Interleaved 2 of 5 PC 861 Icelandic PC865 Nordic UPC A UPC E Code 39 PC APTEC Arabic PC708 Arabic Code 128 POSTNET Coda bar NW 7 PC 720 Arabic PCAR864 Arabic Industrial 2 of 5 Matrix 2 of 5 PC863 Canadian French Abicomp Not displayed in default setting mode BRASCII Roman 8 ISO Latin 1 Hebrew 7 Hebrew 8 PC862 Hebrew PC858 14A08859 15 PC771 Lithuania Not displayed in default setting mode EPSON LX 300 Appendix Q Character tables and typefaces Table 7 15 Character Tables and Typefaces continued Table 7 15 Character Tables and Typefaces Character table Bitmap font Character table Bitmap font NLSP Italic table EPSON Draft version PC 437 US Standard Europe EPSON Roman Standard Italic table EPSON Draft EPSON Sans serif version PC 437 US Standard Europe EPSON Roman EPSON OCR B EPSON Sans serif EPSON OCR B PC 860 Portuguese PC 850 Multilingual EPSON Draft PC 865 Nordic PC 861 Icelandic EPSON Roman PC 850 Multilingual BRASCII EPSON Draft BRASCII
68. ommand function and represent printer settings The printer sends the following string in reply to the commands of this type BDC sp PS CR LF XX Reply Data FF Table 7 33 lists the bi directional commands that can be used with this printer The column on the right indicates the parameters that can be saved by an SV command Table 7 33 Bi Directional Commands Function Enter Remote 1 Code Parameter ESC R 08H 00H 00H REMOTE1 Parameters saved Exit Remote 1 ESC 00H 00H 00H Save settings SV 00H 00H Initialize RS 00H 00H Load power on default LD 00H 00H Select typeface FO 02H 00H 00H m1 m1 0 Roman 1 Sans serif 5 OCR B m1 0to 1 only Select character pitch CP 02H 00H 00H m1 m1 0 10cpi 1 12cpi 2 15cpi 3 17 1cpi 4 20cpi 5 Propotional all parameters saved Select draft or NLO CQ 02H 00H 00H m1 m1 0 Draft 1 LO 2 High speed all parameters draft saved Select character table CT 02H 00H 00H m1 See Table m1 0 Table0 1 Table1 7 34 Assign character table AT 04H 00H 00H m1 m2 m3 See Table 7 34 m1 0 Table0 1 Table1 Table 7 35 m2 m3 ESC P2 Character Table No 4 and Table 7 36 Select an international IC 02H 00H 00H m1 character set m1 0 U S A 1 France 2 Germany 3 U K 4 Denmark1 5 Sweden 6 Italy ma ae X 7 Spain1 8 Japan
69. onomy Drive Circui gt 35V BA033 105 QF1 TL594 1012 O gt VH 35V 1611 OFF op07 Figure 2 6 Main Board Block Diagram EPSON LX 300 Technical Overview Table 2 10 Main Board Components Elements Location Function RISC C33208 CPU OFP 128 pin e Outside clock 19 66 MHz Inside clock 39 32 MHz e 8KB RAM built in e DMA e A D converter CPU IC3 Approximately 21000 gates OFP 160 pin e Bit manipulation e Clock control G A 1C6 e Interface control IEEE1284 Type B I F e Input Buffer control e Motor control e Head control 4M 8Mbit DIP 40 42 pin PROM IC7 e Stores firmware e CG DRAM Ics 1 2 4M bit Switching method SPJ package 40 pin e Processing buffer EEPROM IC5 AT93C46 1kbit SOP 8pin e Stores default values and other parameters M62030 SANYO 8 pin RESETIS a e CPU and G A reset CR Motor Driver IC9 LB1847 SANYO PF Motor Driver IC10 LB1847 SANYO Serial I F Transceiver IC2 HIN202CBN or equivalent BA033 ROHM or equivalent Regulator IC IC11 e e Generates 3 3V logic voltage PD494 or equivalent Regulator IC 1012 e 95V rated voltage circuit e Detects over voltage over 150V and sends OFF signal to the power supply boards Thermistor TH1 Measures temperature of the motor driver CPU and G A will be combined in a later version 2 2 2 Power Supply Board The EPSON LX 300 uses one of two power supply boards C294PSB 100 volt model
70. page mm 101 6 558 8 Base sheet inch ms in 0 0028 0 0035 thickness mm 0 07 0 09 EPSON LX 300 Appendix Rear Entry Bottom Entry Table 7 47 Roll Paper inch 8 5 inch 0 0063 0 0075 Width inc Total thickness mm 0 16 0 19 mm 216 inch i g m 64 Length inc eye Label weight Ib gt 17 mm AVERY continuous form Thickness inch 0 0028 0 0035 labels AVERY Mini Line mm 0 07 0 09 Ouality WAA igs labels or labels of similar 3 g m 52 82 quality wal Ib 14 22 NOTE Printing on labels is available only under normal Ouality Plain paper not curled folded or crumpled temperature and humidity conditions The base sheet of the labels must be continuous paper Continuous paper with labels should be inserted from the bottom entrance 63 5 mm 2 5 inch min l 7 23 8 mm 15 16 inch Label min Radius 2 5 mm 0 1 inch min Figure 7 7 Minimum Label Size EPSON LX 300 Appendix 7 6 Physical Specifications ME OR IES nO E Dimensions 366 x 441 x 370 mm WxDxH UA Without options E Mass Approx 4 6 kg E Dimensions 366 x 275 x 159 mm WxDxH E Mass Approx 4 4 kg Figure 7 9 Dimensions with CSF Figure 7 8 Dimensions without Options EPSON LX 300 Appendix
71. position pressing it W Sans serif Condensed Tear Off a second time returns paper to TOF ll z e Selects font when this function is enabled LED On LED Blinks W LED Off Figure 1 2 Control Panel U Operation at power on Turning the printer on while pressing these buttons executes the following functions Table 1 2 Operation at Power On Button Function Load Eject NLO self test LF FF Draft self test Tear Off Enters default setting mode Load Eject amp LF FF Data dump EPSON LX 300 Product Basics Table 1 2 Operation at Power On continued 1 2 1 2 Indicator Lights LEDs Clear EEPROM returns printer to factory default 7 settings Table 1 4 Printer Status Load Eject amp LF FF amp Pause NOTE Factory default settings aren t Printer Status Pause Paper Out necessarily correct for your market use only if necessary Pause On ee Tear Off amp Load Eject amp LF FF Clear ribbon usage counter stored in EEPROM Paper out error On On Pause Perform Bi D adjustment see page 17 and Release lever error On page 60 Paper eject warning On Blink UA Operation in default setting mode Micro Adjust Blink u Default setting mode is entered by holding down the Tear Off button and i J When all four lights are blinking the printer has a fatal error caused by a turning the printer on The following buttons are used
72. rame dis14 Figure 4 9 CR Motor Assembly Removal E If you replace the CR motor perform the Bi D adjustment on SN page 60 47 EPSON LX 300 Disassembly and Assembly 4 2 8 2 Platen Removal Bushing 11 Preparation Remove the printer mechanism see Printer Mechanism Removal on page 44 1 Remove the grounding spring from the platen 2 Push inward on the hook holding combination gear 17 5 27 on its shaft and remove the gear To release the gear push hook inward toward center of gear and slide gear off shaft Combination gear 17 5 27 Combination gear 17 5 27 Right frame dis21 Figure 4 11 Platen Removal dis20_a Figure 4 10 Removing Combination Gear 17 5 27 3 Rotate the left and right bushings to free the platen then lift the platen out of the printer mechanism EPSON LX 300 4 2 8 3 Carriage Removal Preparation U Remove the printer mechanism see Printer Mechanism Removal on page 44 U Remove the printhead see Printhead Removal on page 42 1 Remove the timing belt from its attachment on the carriage Disassembly and Assembly PG adjust lever CR guide shaft Carriage unit Grounding plate P Carriage Timing Belt T Parallelism adjust bushing L i Parallelism adjustment b
73. re for identification purposes only and may be trademarks of their respective companies EPSON disclaims any and all rights in those marks EPSON LX 300 FCC Compliance Statement for American Users This equipment has been tested and found to comply with the limits for a Class B digital device pursuant to Part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interference in a residential installation This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instructions may cause harmful interference to radio and television reception However there is no guarantee that interference will not occur ina particular installation If this equipment does cause interference to radio and television reception which can be determined by turning the equipment on and off the user is encouraged to try to correct the interface by one or more of the following measures U Reorient or relocate the receiving antenna O Increase the separation between the equipment and receiver DO Connect the equipment into an outlet on a circuit different from that to which the receiver is connected O Consult the dealer or an experienced radio television technician for help Warning The connection of a non shielded equipment interface cable to this equipment will invalidate the FCC Certification of this device and may cause interference levels th
74. rial interface connector to the 3 Remove the control panel board from the lower housing lower shield plate then remove the connector from the hole in the shield plate 2 Remove 2 screws CP M3x6 securing the parallel interface to the lower shield plate 3 Remove the ribbon cables from CN12 and CN13 for the optional color upgrade kit and control panel 4 Disconnect the power supply harness from CN8 5 Remove 3 screws CBP 3x10 securing the main board to the lower housing and remove the board SS If you replace the main board perform the destination setting REQUIRED and Bi D adjustment on page 60 CPB 3x10 Control Panel Board dis08 Figure 4 5 Control Panel Board Removal 45 EPSON LX 300 Disassembly and Assembly 4 2 7 Power Supply Board Removal Lower Shield Plate CP M3x6 Hexagon Nut Preparation CBP 3x10 IN 4 OU Remove the upper housing see Upper Housing Removal on page 43 U Remove the printer mechanism see Printer Mechanism Removal CN13 on page 44 1 Remove the power cable from CN1 on the power supply board 2 Slide the power switch out of the lower housing CN12 3 Remove the harness connecting the power supply board to the main board CN8 on the main board 4 Remove 4 screws CBP 3x10 securing the power supply board to the low
75. rinter mechanism Follow the steps below to perform the adjustment _ Connect the printer to a computer using a parallel cable Turn on the computer and printer Load continuous paper in the printer Po N Start the adjustment program It s referred to as Q80A10V this is the same adjustment program used by the EPSON LO570e You see this screen 6 Using the arrow keys make sure 9 pin is selected and press Enter 5 Press Enter EPSON LX 300 Adjustments You see this screen You see this screen Li SE ee The available destination settings are as follows 8 Select Out Going and press Enter Table 5 2 Destination Setting List Destination Setting Destination Setting EAI EAI Latin USASTD EDG NLSP NLSP EURO EDG EUL EUL SCANDINAVIA EURSTD eu DEFSTD EFS EIS EIB 4 7 Select USASTD and press Enter EPSON LX 300 Adjustments You see this screen 9 You see this screen Make sure 80 column is selected and press Enter Cs LOSE I u A be DE Selli i EN 1 1 lut ba SEIN 10 Make sure Bi D Adjust is selected and press Enter EPSON LX 300 Adjustments You see this screen 12 Make sure the characters in the 1st and 3rd lines are aligned with the characters in the 2nd and 4th lines al fe Al BR BB LS FE Ist line o HHHHHHHH hi ma tine HHHHHHHH sra tie HHHHHHHH s tie HHHHH
76. se B 4 O LED3 LED3 5 O LED2 LED2 Table 7 10 P r Feed Motor CN11 en APONEA Are 6 O LED1 LED1 Pin 1 0 Signal Name Function 7 I sw1 Switch 1 1 O PFA Paper feed motor phase A 5 8 GND Signal ground 2 O PFA Paper feed motor phase A f 9 GND Signal ground 3 O PFB Paper feed motor phase B gt 10 SW2 Switch 2 4 O PFB Paper feed motor phase B 11 I SW3 Switch 3 Table 7 11 Color Shift Motor CN12 Pin 1 0 Signal Name Function 1 VH 35VDC 2 CS HOLD 5VDC 3 5V 5VDC 4 O CSA CS motor phase A 5 O CSXA CS motor phase XA 6 O CSB CS motor phase B 7 O CSXB CS motor phase XB 8 GP Signal ground 9 CSSW Color ribbon sensor signal 10 GND Signal ground EPSON LX 300 Appendix 7 2 Printing Specifications 7 2 1 Printing Specification O Print method Impact dot matrix Number of pins 9 pins O Print pin arrangement 9x1 A Print pin diameter 0 29 mm 0 0114 inch A Color Option Black Magenta Cyan Yellow Q Print direction Bi directional with logic seeking O Print speed and printable columns Table 7 13 Print Speed and Printable Columns Table 7 13 Print Speed and Printable Columns continued Printing mode en pitch sll nent gur ados NLO 10 80 56 12 96 67 15 120 56 17 137 47 20 160 56 NOTE If the power supply voltage drops to the lower limit the printer stops printing and then resumes printing but more slowly than before O Resolut
77. sensor and watch for the meter reading to alternate between zero and infinity If this fails to occur the sensor is defective and must be replaced 3 4 4 Printhead Driver Check The printhead driver transistors 03 through 011 nine in all can be tested as follows 1 Set the multimeter to measure resistance in the 10 000 ohm range 2 Touch one probe to the base of each transistor marked B and touch the other probe to its emitter marked E If the transistor is okay the resistance should be neither zero nor infinity On a test sample all the transistors read about 6000 ohms EPSON LX 300 Disassembly and Assembly 4 1 Overview 4 1 2 Tools The table below lists the tools recommended for disassembly assembly and Follow the instructions in this chapter to disassemble and assemble LX 300 adjustment All tools are commercially available Unless otherwise noted reassemble the printer by following the disassembly steps in reverse Table 4 1 Recommended Tools 4 1 1 Precautions Needle nose pliers B740400100 ROS a Always unplug the printer before servicing En Wire cutter B740500100 Bear in mind that the printhead may be hot after printing Inder ER F Philips screwdriver No 2 B743800200 Hex wrench 7 mm B741700200 Use the tools specified in this chapter Thickness gauge set B776702201 Lubricate the printer as needed using only the specified oil and grease See Maintenan
78. t in the same manner remove the sensor and disconnect the cable from the sensor white EPSON LX 300 Disassembly and Assembly 4 2 8 7 Platen Gap PG Sensor Removal 4 2 8 8 Removing the Tractor Release Lever Sensor 1 Release the 2 hooks of the PG sensor securing it to the left frame and Preparation remove the sensor i Remove the printer mechanism see Printer Mechanism Removal on 2 Disconnect the harness from the sensor white page 44 1 Loosen the sensor s cables as necessary then disconnect the harness blue from the sensor 2 Release the 2 hooks securing the sensor to the right frame and remove the sensor Release lever position sensor blue Hook dis19 Figure 4 19 Release Lever Sensor Removal PG sensor white dis11 Figure 4 18 PG Sensor Removal 52 EPSON LX 300 4 2 8 9 Paper Feed PF Motor Removal Preparation Remove the printer mechanism see Printer Mechanism Removal on page 44 1 Remove the platen grounding spring from the platen 2 Remove 1 screw CBP 3x10 securing the PF motor to the right frame 3 Release the clip on the right frame securing the PF motor and remove the motor Platen grounding spring PF motor E Positioning pin CBP 3x10 Clip dis20 Figure 4 20 PF Motor Removal When installing the PF motor align i
79. t with the positioning pins shown above Disassembly and Assembly 4 2 8 10 Removing the Tractor Drive Gears Preparation U Remove the printer mechanism see Printer Mechanism Removal on page 44 U Remove the PF motor see Paper Feed PF Motor Removal on page 53 1 Move the tractor release lever to the forward position Remove the tractor release lever Release shaft Tractor release lever dis22 Figure 4 21 Tractor Release Lever Removal When installing the release lever be sure to align the mark on the lever with the mark on the release shaft as shown above 53 EPSON LX 300 Disassembly and Assembly 3 Release the hook securing gear 27 5 and remove the gear washer and compression spring 4 Remove combination gear 8 5 25 2 Hook securing gear Compression spring Plain washer Combination gear 8 5 25 2 Gear 27 5 dis23 Figure 4 22 Gear Removal 4 2 8 11 Paper Guide Removal Preparation Q Remove the printer mechanism see Printer Mechanism Removal on page 44 Remove the platen see Platen Removal on page 48 U Remove the carriage unit see Carriage Removal on page 49 U Remove the PF motor see Paper Feed PF Motor Remova page 53 on U Remove the tractor release lever see Removing the Tractor Drive Gears on page 53 1 Turn the print
80. tailed specifications Connector pin assignments Parts list a m Electrical diagrams a m Exploded diagrams Symbols Used in This Manual Warnings must be followed to avoid personal injury or death Cautions must be followed to avoid damaging the product Reassembly notes provide helpful tips for reassembly vi EPSON LX 300 WARNING General Precautions When servicing unplug the unit from the power outlet and disconnect any attached devices Never touch the primary parts of the power supply including the heat sink when the unit is plugged in Its primary circuitry remains live whenever it is plugged in No work should be performed on the unit by persons unfamiliar with basic safety measures familiar to trained electronics technicians When performing testing or troubleshooting procedures in this manual do not connect the unit to a power source until instructed to do so When the power supply cable must be connected use extreme caution in working on the power supply board and other electronic components Repairs on EPSON products should be performed only by an EPSON certified repair technician Make certain that the source voltage is the same as the rated voltage listed on the serial number plate If the unit has a primary AC rating different from the available power source do not connect it to the power source Always verify that the unit has been disconnected from the power source before removin
81. tandard 1 0 A Maximum e Normal 1350Hz or less e Copy 1350Hz or less e Black ribbon 0 2 billion stroke per pin Head drive frequency or more ln e Color ribbon 0 1 billion strokes per pin or more Environmental conditions A 202578 op03 e Humidity 10 to 85 Figure 2 2 Pin Configuration The printhead also works as the printer s beeper to generate sound the driver causes the pins to vibrate at a high frequency Table 2 2 Beeper Drive Specifications Item Specification Head voltage 35 2 1 3 5 V Drive frequency 2 KHz 1 5KHz EPSON LX 300 Technical Overview 2 1 2 Carriage Mechanism Home Position Sensor The printer uses a mechanical contact switch to determine when the carraige is at home position on the left side of the printer The switch is OPEN when the carriage is in home position and CLOSED when away from home position Carriage Motor This printer uses a DC stepper motor Table 2 3 CR Motor Specifications Item Specification Motor type 2 phase 200 pole hybrid stepper motor Coil resistance 5 7 Q 10 25 C Control method Bi polar drive Phase drive 2 2 phase 1 2 phase W1 2 phase Drive voltage 36 75 1 75 V Minimum Resolution 0 212 mm 1 120 1 2 phase 2 pass CR feed pitch Under certain conditions the carriage can move at different speeds For example when printing on thicker paper such as multipart forms the carr
82. te 300 600 1200 2400 4800 9600 or 19200 bps U Handshaking DTR signal and XON XOFF DTR MARK XOFF indicates that the printer cannot receive data DTR MARK XON indicates that the printer is ready for data NOTE The DTR signal goes to MARK and the XOFF code DC3 13H is transmitted when the input buffer drops below 256 bytes The DTR signal is set to SPACE and the XON code DC1 11H is transmitted when the input buffer recovers 256 bytes O Error handling Parity error only is detected Overrun error and framing error are ignored OU Connector 25 pin subminiature D shell connector female EPSON LX 300 Appendix 7 3 4 Interface Selection The printer has two interfaces parallel and serial These interfaces can be selected manually as a Default Setting or selected automatically by the printer OU Manual Selection One of two interfaces can be selected in Default Setting mode O Automatic Selection Automatic interface selection is enabled as a Default Setting In this mode the interface that receives data first after printer initialization is selected As long as the host sends data or the printer interface is busy the selected interface remains the same When the host stops sending data and the printer is in standby for the length of time specified in the default settings the interface de selects O Interface State and Interface Selection When the parallel interface is not selected it goes into a busy state When th
83. tions containing data and control information with another device across a single point to point link The multiplexed logic channels are independent of each other and blocking of one has no effect on the others The protocol is not a device control language but only provides basic data flow control and multiplexing services EPSON LX 300 Appendix 7 4 Control Codes 7 4 1 ESC P2 Table 7 30 ESC P2 Classification Table 7 30 ESC P2 Operation Command Classification Operation Command General Operation Initialize Printer ESC Unidirectional Printing ESC U CSF Mode Control ESC EM Paper feeding Form Feed FF Line Feed LF Line Spacing ESC 0 ESC 2 ESC3 ESC A Carriage Return CR Page format Page Length ESC C ESC CO ESC C Left Right Margin ESC O ESC1 Font enhancement Double Width ESC W DC4 SO Condensed DC2 SI Double height ESC w Double Strike ESC G ESC H Super Subscript ESC T ESCS Underline ESC Spacing Intercharacter Space ESC Space Character handling Character Table ESC t ESC t International Character ESC R User Defined Characters ESC ESC amp ESC Control code selection ESC1 Upper Control Codes ESC6 ESC7 Top Bottom Margin ESC N ESC O ESC c Print position motion 8 pin Bit Image ESC K ESC L ESC Y ESC Z ESC Bit image 9 pin Bit Image ESC Printing color Se
84. ushin Left frame Base frame Right frame dis16 Figure 4 13 Carriage Removal Attachment dis15 Figure 4 12 Timing Belt Removal 3 Rotate the right and left parallelism adjustment bushings so that they align with the cutouts in the frame then push them out through the f 3 2 Remove the grounding plate on the left side of the printer as shown in del Figure 4 13 EPSON LX 300 Disassembly and Assembly 4 Slide the carriage all the way to the right then move the platen gap lever 4 2 8 4 Ribbon Feed Mechanism Disassembly all the way to the rear as shown below Preparation U Remove the printer mechanism see Printer Mechanism Removal on page 44 U Remove the tension spring from the motor bracket to release tension from the timing belt see Carriage CR Motor Removal on page 47 1 Release the 3 hooks securing the cover of the ribbon feed mechanism and remove the cover Planetary lever assy RD cover RD ratchet PG Lever Timing belt dis17 Figure 4 14 Platen Gap Lever gt EOS 5 Remove the platen gap lever by carefully flexing it off the frame Then Driven pulley assy remove the carriage along with the CR guide shaft from the printer mechanism Combination gear 51 16 2 Gear 13 2 Zeile If you replace the carriage perfor

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