Star Micronics LC-8521 Technical Manual Download Page 1

Page: 1 / 124

DOT MATRIX PRINTER

LC-8521

TECHNICAL MANUAL

[ THIRD EDITION ]

Summary of Contents for LC-8521

Page 1: ...DOT MATRIX PRINTER LC 8521 TECHNICAL MANUAL THIRD EDITION ...

Page 2: ... are subject to change without notice All efforts have been made to ensure the accuracy of the contents of this manual at the time of going to press However should any errors be detected STAR would greatly appreciate being in formed of them The above notwithstanding STAR can assume no responsibility for any errors in this manual Copyright 1997 Star Micronics Co Ltd ...

Page 3: ...ser Usersofthismanualshouldhaveabasicknowledge and understanding of the English language This manual is divided into the following sections Chapter 1 General Specifications Chapter 2 Theory of Operation Chapter 3 Adjustments Chapter 4 Parts Replacement Chapter 5 Maintenance and Lubrication Chapter 6 Troubleshooting Chapter 7 Parts List First edition Mar 1997 Second edition Aug 1997 Third edition N...

Page 4: ......

Page 5: ...ecifications 10 4 2 Connector Signals 10 5 Serial Interface 11 5 1 General Specifications 11 5 2 Connector Signals and Functional Descriptions 11 6 Serial Interface SPC 8K Option 12 6 1 General Specifications 12 6 2 Connector Signals and Functional Descriptions 12 6 3 DIP Switch Settings 13 7 EE PROM Mode 14 7 1 Outline 14 7 2 Explanation of Special Control Codes 14 7 3 EE PROM Map 15 7 4 Rewritin...

Page 6: ... 2 ...

Page 7: ...nt lever position 4 to 8 Line Spacing 1 6 1 8 7 60 7 72 n 72 n 180 n 216 n 360 software Character Matrix Pitch HS Draft Draft LQ Pica 10 cpi 24 7Η 24 9H 24 31H Elite 12 cpi 24 9H 24 27H Semi condensed 15 cpi S 16 7H 16 21H Semi condensed 15 cpi I 24 9H 24 16H Condensed pica 17 cpi 24 9H 24 16H Condensed elite 20 cpi 24 9H 24 16H 24 cpi I 24 9H 24 14H H half dot S Standard mode only I IBM mode only...

Page 8: ... 240 104mm 6 6 5 3 6 166 92mm Emulation Standard Mode EPSON ESC P 24 pin NEC Graphic Compatible IBM Mode Proprinter XL24E Interface Standard Centronics parallel RS 232C serial Ribbon Type On carriage dedicated Monochrome Black only LZ24HD Standard Ribbon Life LZ24HD 4million characters ASCII Draft Power Supply 110V AC 20 18 230V AC 14 13 50 60Hz depending on country of purchase Power Consumption 1...

Page 9: ...ition Fig 1 3 Rear view of the Printer Fig 1 2 Front view of the Printer Front cover Adjustment lever Paper guide Release lever Power switch Document table Control panel Platen knob Parallel Interface connector Serial Interface connector ...

Page 10: ... Printer Mechanism Carriage Motor Ribbon Holder Control Panel Board Main Logic Board Power Supply Unit Fig 1 4 Front cover removed Ribbon Cartridge Print Head Platen Gap Adjustment assy Paper Feed Roller Fig 1 5 Diagram of internal layout ...

Page 11: ... ON Exit Next Right Left EDS MODE DOT ADJUSTMENT MODE Short Test Long Test Multi part Mode Font Lock ON LINE Pitch Lock On Off Micro Feed Back ward Auto Loading Position Change Mode Factory settings Cancel Forward Paper Loading Back ward Save Set AUTO LOADING POSITION CHANGE MODE HS DRAFT BANK SW D 4 E 5 F 6 A 1 B 2 C 3 10 CPI POWER 15 CPI COND PROP 12 CPI DRAFT ROMAN SANSERIF COURIER PRESTIGE ORA...

Page 12: ...FF ON ON ON ON 772 ON OFF OFF ON OFF ON 863 ON ON OFF ON ON ON 774 OFF OFF OFF ON OFF ON 865 OFF ON OFF ON ON ON 3001 ON ON ON OFF OFF ON 866 ON OFF OFF ON ON ON 3002 OFF ON ON OFF OFF ON 3840 OFF OFF OFF ON ON ON 3011 ON OFF ON OFF OFF ON 3841 ON ON ON OFF ON ON 3012 OFF OFF ON OFF OFF ON 3843 OFF ON ON OFF ON ON 3021 ON ON OFF OFF OFF ON 3844 ON OFF ON OFF ON ON 3031 OFF ON OFF OFF OFF ON 3845 O...

Page 13: ... 0 ON ON 1 0 ON OFF 1 5 OFF ON 0 5 OFF OFF C 1 Top margin for cut sheet 1 6 0 2 Top margin for Fanfold paper Rear 1 6 0 3 Top margin for Fanfold paper Front 1 6 0 4 Bottom margin for Cut sheet 1 6 0 5 Bottom margin for Fanfold paper Rear 1 6 0 6 Bottom margin for Fanfold paper Front 1 6 0 Default settings 19200 9600 4800 2400 1200 600 300 1 ON OFF ON OFF ON OFF ON OFF 2 ON ON OFF OFF ON ON OFF OFF...

Page 14: ...l Interface 4 2 Connector Signals Pin Name Function 1 STROBE Goes low for 0 5µs when active 2 DATA0 3 DATA1 4 DATA2 5 DATA3 6 DATA4 7 DATA5 8 DATA6 9 DATA7 10 ACK 10µs low to acknowledge receipt of data 11 BUSY Printer sets line low when ready to receive data 12 PAPER High when paper runs out 13 SELECT High when printer is on line 14 AFXT Printer ignores this signal 15 Not used 16 SIGNAL GND Signa...

Page 15: ... to receive data 21 25 Not used 5 Serial Interface When using the serial interface the optional Serial Parallel Converter must be connected to the printer 5 1 General Specifications Item Specifications Interface RS 232C level Synchronization System Asynchronous Baud rate 300 19 200 bits per second BPS selectable 300 300 600 1200 2400 4800 9600 19200 BPS Word length Start bit 1 bit Data bit 7 or 8 ...

Page 16: ...15V Space Logic 0 3V to 15V Handshaking DTR XON XOFF ETX ACK Data buffer 8KB standard 6 2 Connector Signal and Functional Descriptions Pin No Signal name Direction Function 1 GND 2 TXD OUT 3 RXD IN 4 RTS OUT 5 CTS 6 NC 7 GND 8 10 NC 11 RCH OUT 12 19 NC 20 DTR OUT 21 25 NC Printer chassis ground This pin carries data from the printer This pin carries data to the printer Always space This signal is ...

Page 17: ... parity 6 7 Data transfer rate see table below 8 All switches are set to ON before the printer leaves the factory Protocol Switch 3 Switch 4 DTR mode ON ON XON XOFF mode ON OFF ETX ACK mode OFF ON Baud rate Switch 6 Switch 7 Switch 8 150 OFF OFF OFF 300 OFF OFF ON 600 OFF ON OFF 1200 OFF ON ON 2400 ON OFF OFF 4800 ON OFF ON 9600 ON ON OFF 19200 ON ON ON ...

Page 18: ...o entire area of EE PROM 00H 7FH 128bytes ESC MW1nm Stores data m into the address n nH 1 byte ESC MW2 data Stores auto start software data into 43H 60H 30bytes EE PROM 61H 7DH 29bytes The data m used in the commands above are stored in the specified address in order n When the data to be stored exceeds the specified capacity subsequent data are ignored Data are stored in the EE PROM according to ...

Page 19: ...ional b1 Tear off Disabled Enabled b2 Line Spacing 1 6 1 8 b3 Auto LF with CR Disabled Enabled b4 Zero Style Normal Slashed b5 Strobe Timing Normal Reverse 02H EDS setting FFH Print Mode Print Pitch Function b0 b1 Function b2 b3 b4 LQ 1 1 10cpi 1 1 1 Draft 0 1 12cpi 0 1 1 HS Draft 1 0 15cpi 1 0 1 17cpi 0 0 1 20cpi 1 1 0 Proportional 0 1 0 Bit Function 1 0 b5 Quiet Disabled Enabled 03H EDS setting ...

Page 20: ... 0 0 1 0 1 774 0 0 0 1 0 1 3001 1 1 1 0 0 1 3002 0 1 1 0 0 1 3011 1 0 1 0 0 1 3012 0 0 1 0 0 1 3021 1 1 0 0 0 1 3031 0 1 0 0 0 1 3041 1 0 0 0 0 1 3850 0 0 0 0 0 1 3860 1 1 1 1 1 0 3861 0 1 1 1 1 0 3863 1 0 1 1 1 0 3864 0 0 1 1 1 0 3865 1 1 0 1 1 0 International Character Set Character Table Italics Function b0 b1 b2 b3 b4 b5 U S A 1 1 1 1 1 1 France 0 1 1 1 1 1 Germany 1 0 1 1 1 1 England 0 0 1 1 ...

Page 21: ...e 80H 1AH Misalignment correction multi part 120 DPI F 80H 1BH Misalignment correction multi part 180 DPI H 80H 1CH Misalignment correction multi part 180 DPI F Text 80H 1DH Misalignment correction multi part 180 DPI F Bit image 80H 1EH Misalignment correction multi part 240 DPI H 80H 1FH Misalignment correction multi part 360 DPI H Text 80H 20H Misalignment correction multi part 360 DPI H Bit ima...

Page 22: ...mage 80H 2DH 2EH Top margin in auto loading for rear tractor mode 00H 00H 2FH 30H Top margin in auto loading for front tractor mode 00H 00H 31H 32H Top margin in auto loading for friction mode 00H 00H 33H Paper end sensor A D value for carriage 75H 34H Paper end sensor A D value for paper set 75H 35H 38H Macro Set EPSON 00H 00H 39H 3CH Macro Set IBM 00H 00H 3DH 3EH Tear off length Short 00H 80H 3F...

Page 23: ...ogram 10 LPRINT CHR 27 CHR 26 CHR H09 20 LPRINT CHR 27 MW1 CHR H01 CHR HFB 30 LPRINT CHR 27 MR BASIC Program Code What It Does 10 LPRINT CHR 27 CHR 26 CHR H09 Enters the EE PROM mode 20 LPRINT CHR 27 MW1 Starts rewriting the EE PROM CHR H01 Address data from H01 will show EDSmodefromtheEE PROMmemory map CHR HFB Data from HFB will change the Line spacing from 1 6 to 1 8 30 LPRINT CHR 27 MR Dumpsall...

Page 24: ... 20 ...

Page 25: ...t Main Logic Board 24 3 Power Supply Circuit 25 4 Mechanisms 26 4 1 Print Head Mechanism 26 4 1 1 Character Mechanism 26 4 1 2 Print Wire Drive Operation 26 4 2 Print Head Carrying Mechanism 27 4 3 Ink Ribbon Feed Mechanism 28 4 4 Paper Feed Mechanism 29 4 5 Detectors 30 2 ...

Page 26: ... 22 ...

Page 27: ...cter font EE PROM KM93C46 64 16 bits Contains the data EDS data and so on in the memory switch RAM 1M bit Used as a stack area work area and data buffer of the CPU Parallel interface Gate array custom IC Inputs outputs several signals Driver The data edited by the CPU and gate array are sent to the printer mechanism after conversion to the signal for the print head drive and motor drives 2 Control...

Page 28: ... 24 Fig 2 2 General Flow Chart of Editing and Printing 2 General Flow Chart Main Logic Board The flow chart below shows you the general flow of editing and printing operations ...

Page 29: ... A 5 VDC 5 0 3 A Dropper 40 VDC 5 3 3A Ringing choke converter For logic circuit drive for motor holding For print head drive for motor drive Output Input 100VAC 110VAC 220VAC 230VAC 240VAC Noise filter circuit In rush current protection circuit Rectifier circuit Voltage auto select circuit Switching section Transistor Q1 Ringing choke converter Dropper circuit Voltage reference Control circuit Tr...

Page 30: ...ad consists of 24 needle wires and 24 print solenoids The following explains how each needle wire operates during printing 1 When the print solenoid is energized the clapper is attracted by the iron core and the needle wire is driven toward the platen 2 This needle wire hits the platen via the ink ribbon and paper A single dot is printed on the paper 3 When the print solenoid is de energized the n...

Page 31: ...he carriage motor and the timing pulley of the tension lever The timing belt maintains a constant tension The timing belt is also clamped to the base of the carriage so that it can move the carriage accurately with driving force from the carriage motor Carriage Motor The carriage motor is a HB Hybrid 4 phase 200 pole pulse motor driven by pulse signals from the control circuit The rotational rate ...

Page 32: ...ement of the carriage along the serrated edge of the rear angle of the printer mechanism drives the idler gear The rotation of the idler gear is conveyed sequentially to the gears that work and wind the ribbon The carriage has a clutch lever that keeps the direction of the cassette gear rotation constant regardless of the direction of the idler gear rotation as the carriage moves left and right Fi...

Page 33: ... Paper Feed Mechanism The turn of the paper feed motor is transmitted to the PF Paper Feed roller and tractor unit via the release lever front rear release arm tractor clutch lever clutch gear and change lever The paper feed motor is a HB Hy Brid 4 phase and 96 pulse motor The changing of the rotational direction depends on the detectors on Frame L There are threeways of feeding paper into the pri...

Page 34: ... Over130 2 Home position detector A photo interrupter is used in the home detector on the printer ON OFF signals are generated according to the position of the carriage Shield plate mounted at the base of the carriage The printing position is determined by these signals Fig 2 11 Home position detector circuit Output V Decision 5 in home position with shield plate 0 not in home position without shi...

Page 35: ...end detector Front circuit 4 Paper end detector Rear A photo interrupter is used in the paper end detector rear on the printer ON OFF signals are generated as the paper end activates the paper detector lever mounted at the frame base 5V R2 R1 C1 R3 5V Detecting signal Fig 2 13 Paper end detector Rear circuit 5 Paper end detector Carriage unit The paper end detector is located in the carriage unit ...

Page 36: ...ront 0 0 Friction 0 5 Tractor Rear 7 Adjust lever position detector When the Adjust lever is set to or below position 3 the leaf switch becomes ON as the Adjust lever is at 4 or above the leaf switch comes to OFF Detecting signal 5V Leaf switch R2 R1 Fig 2 15 Release lever position detector Fig 2 17 Adjust lever position circuit Control Method Adjust lever position Out put V Print method 5 0 3 Nor...

Page 37: ...e In this chapter a brief explanation is given of the methods for making adjustments Follow the instructions when performing maintenance inspections or when replacing parts to correct malfunctions 1 Adjustment of Gap Between Print Head and Platen 35 2 Adjustment of Timing Belt Tension 36 3 Adjustment of Paper end detector 37 3 ...

Page 38: ......

Page 39: ...Right positions Use adjust bushing L R 7 to adjust the gap Fig 3 4 Center position Use gap adjustment assy 8 to adjust the gap Fig 3 5 Adjust sequenc six Left Right Center Left Center Right 5 Loosen rear angle 2 6 Install the ribbon holder 1 rear angle 2 and upper case Fig 3 1 Mechanism Fig 3 2 Positioning the carriage unit Fig 3 3 Gap measurement Fig 3 5 Gap adjustment assy Ribbon holder 1 Second...

Page 40: ... carriage unit 1 up to the extreme right position 3 Move the screw 3 fixing tension lever assembly 2 approximately 1mm to loosen the tension then tighten the screw The timing belt tension 4 is determined by the spring 5 Fig 3 6 Adjustment of timing belt tension Tension lever assembly 2 Timing blt 4 Screw 3 Spring 5 Carriage unit 1 ...

Page 41: ...ark Enter paper out value A Loading fanfold paper Enter paper in value B Find average center value of A and B Normal range Print the new Paper end detector A D value massage 1 Register the new Paper end detector A D value END Print the error message 2 Adjust ment error New value not recorded END END 1 FRONT PAPER END SENSOR upper lower OK CR PAPER END SENSOR upper lower OK 2 FRONT PAPER END SENSOR...

Page 42: ... 38 ...

Page 43: ...the screw heads with locking sealant 4 Lubrication information is not provided in this chapter Refer to section 2 in chapter 5 1 Upper Case Unit 41 2 Ribbon Holder 41 3 Printer Mechanism 42 4 Main Logic Board Unit 42 5 Power Supply Unit 43 6 Fuse 43 7 Carriage Motor Unit 44 8 Print Head 44 9 Carriage Board Unit 45 10 Carriage Unit 46 11 Roller Angle Unit 46 12 Frame Holder Unit 47 13 Paper Feed Ro...

Page 44: ......

Page 45: ... 2 Sheet guide unit 3 Five screws 4 Upper case unit 5 Control panel board 6 1 Remove Upper case unit as described in section 1 2 Move the carriage unit to the center 3 Loosen two screws 1 4 Lean the carriage unit to the rear angle assy 2 5 Remove Ribbon hoder 3 1 Upper Case Unit 2 Ribbon Holder 2 4 4 3 5 a a 1 6 3 2 1 1 ...

Page 46: ...Remove Upper case unit as described in section 1 Five screws 1 Two screws 2 Four connectors 3 Head cable 4 Printer mechanism 5 1 Remove Printer mechanism as described in section 3 Connector 1 Five screws 2 Main logic board unit 3 1 2 5 3 4 2 2 3 a 1 a ...

Page 47: ...e fuse as follows AC voltage Fuse Type 110V 240V 215 5A 250V New fuse blown Inspect circuit 5 Power Supply Unit 6 Fuse 1 Remove Printer mechanism as described in section 3 Connector cable 1 Seven screws 2 Screw 3 Inlet holder 4 Switch holder 5 Power supply unit 6 2 4 2 3 6 1 5 2 a a 1 ...

Page 48: ...platen Refer to section 1 of Chapter 3 2 3 1 7 Carriage Mottor Unit 1 Remove Upper case unit as described in section 1 2 Loosen screw 1 Remove Spring 2 Set tension lever assy 8 in the unlocked position Four screws 3 Four collars 4 Timing belt 5 Spring 6 Carriage motor unit 7 Note When assembling the carriage motor assy the tension lever assy 8 must be secured with the screw 1 when the spring 2 is ...

Page 49: ...it 2 Release the hook 3 Remove the head cables from the frame holder unit 1 2 3 Note Fold the head cables according to the dimensions show below 100 1 0 5 0 5 0 5 0 5 10 1 18 1 100 1 10 1 13 5 1 188 1 188 1 566 1 572 5 1 0 5 0 5 35 1 0 5 0 5 Size mm Double sided tape Cat size Double sided tape 10 1 23 1 ...

Page 50: ... Carriage Motor Unit as described in section 7 Stop ring 1 Timing belt 2 Two screws 3 Rear angle assy 4 Stop ring 6 Two ground pring 5 Adjust gear 7 Adjusting bushing L R 8 9 Adjusting bushings L R can be removed by turn ing them Carriage unit 10 Remove the head cables 11 from the frame holder unit 12 10 Carriage Unit Adjusting bushing Side R Side L 6 9 4 3 1 5 8 7 2 9 8 10 11 12 5 ...

Page 51: ...older unit 8 Remove the head cable 9 frome Frame holder unit 8 Note Roll pins 4 should not be used again once they have been removed Always use new ones 9 7 1 4 3 5 4 2 5 6 13 Paper Feed Roller Unit 1 Remove Carriage unit as described in section 10 Frame holder unit as described in section 12 Spring 1 Two stop rings 2 Poly slider 3 Gear 4 Paper feed roller unit 5 2 4 3 5 2 1 ...

Page 52: ... 6 Bushing 7 Wave washer 8 Plain washer 9 Platen Assy 10 10 7 5 4 6 5 5 8 9 1 2 3 14 Paper Guide Unit 1 Remove Roller angle unit as described in section 11 Paper feed roller unit as described in section 13 Screw 1 Detector cover 2 Gear 3 Seventeen screws 4 Rom cover 5 Paper guide unit 6 Note Gear 3 should not be used again once they have been removed Always use new ones 4 2 1 6 4 4 3 5 ...

Page 53: ...ring 3 Gear 4 Paper feed motor assy 5 6 5 4 2 3 1 17 Change Plate Assy 1 Remove Paper guide unit as described in section 14 Stop ring 1 Gear 2 Two stop rings 3 Poly Slider 4 Collar 5 Front release arm 6 rear release arm 7 Stop ring 8 Change lever 9 Gear 10 Change plate assy 11 Side R 2 1 Side L 11 10 9 8 3 3 5 7 4 6 ...

Page 54: ......

Page 55: ...CHAPTER 5 MAINTENANCE AND LUBRICATION 1 Maintenance 53 1 1 Cleaning 53 1 2 Checks 53 2 Lubrication 54 2 1 Lubricant 54 2 2 Lubricating Method 54 2 3 Lubricated Areas 54 5 ...

Page 56: ... 52 ...

Page 57: ...adequate due to cleaning replenish it 1 2 Checks Checks must be carried out at two levels a daily check which the operator can easily carry out during operation and a periodic check which an expert should carry out 1 Daily check When the printer is used on a daily basis check that the printer is used properly Make sure that the printer is operating under the best conditions Is any paper stuck in t...

Page 58: ...d Bushing EM 30L 5 Rubbing surfaces of Paper feed roller unit and Bushing EM 30L 6 Rubbing surfaces of Paper feed roller unit and Change lever EM 30L 7 Rubbing surfaces of Paper feed roller shaft and Release spring EM 30L 8 Rubbing surfaces of Paper feed roller shaft and Roller holder EM 30L 9 Rubbing surfaces of Timing pulley and Shaft EM 30L 10 Rubbing surfaces of Pulley cap and Stop ring EM 30L...

Page 59: ... 55 R 10 9 J a a A L C H B G M O Q J K 1 2 7 8 25 8 3 4 5 4 25 3 6 5 7 T D E N P D E a Fig 5 1 Lubricated Areas printer mechanism ...

Page 60: ... 56 S 6 F R S N H L B 4 8 3 13 13 14 12 12 5 14 5 4 11 8 3 T Q G A C Fig 5 2 Lubricated Areas printer mechanism 2 2 ...

Page 61: ... 57 Areas to Lubricate 18 17 Fig 5 3 Lubricated Areas Frame L a b 16 15 15 a b Fig 5 4 Lubricated Areas Frame R ...

Page 62: ... 58 20 26 26 20 19 Areas to Lubricate 21 22 23 Rear of Gear Cover 24 24 24 24 Fig 5 5 Lubricated Areas Carriage unit Fig 5 6 Lubricated Areas Tractor unit ...

Page 63: ...rt 62 3 Repair by Unit Replacement 63 4 Repair by Parts Replacement 69 4 1 Does not Operate at All with Power on 69 4 2 Power Supply Circuit Abnormal 70 4 3 Defective Motor Operation 71 4 4 Defective Print Head Operation 72 4 5 Defective Interface Operation 73 5 Waveform with Oscilloscope 74 6 ...

Page 64: ... 60 ...

Page 65: ...act of connectors Replaceable units consist of the following Power supply unit Main logic board Printer mechanism Control panel board In replacing these units always refer to the unit replacement priority chart 2 The second method is to make repairs by parts replacement to replace defective elements inside a particular unit Note 1 Before starting to repair be sure to check visually the contact of ...

Page 66: ...ring operation No motor holding power power very weak Dots skipped Print is too light Ink ribbon entanglement wire sticks out Absence of paper not detected Lever position not detected Incorrect printing Ink ribbon not forwarded No operation at EDS setting Faulty operation when power is turned on off Abnormal motor operating speed slow Fuse blown during operation Error detection of head temperature...

Page 67: ...place main logic board 3 Repair by Unit Replacement B Carriage motor operating waveform is normal 1 YES Replace printer mechanism NO 1 See 6 and waveform in item 5 of Chapter 6 1 START Turn power off Remove I F cable Mount ink ribbon Set paper Move carriage to center Turn power on Carriage Moves YES Carriage operates normally YES Carriage stops at home position left side YES ...

Page 68: ...n line lamp signal is normal Replace main logic board E YES Paper feed motor drive waveform is normal 2 YES Replace printer mechanism 2 See 7 waveform in item 5 of Chapter 6 3 See 6 and waveform in item5 of Chapter 6 1 2 On line lamp light YES Press on line switch to take off line On line lamp is out YES Press paper feed switch Paper feed switch operation is normal YES Turn power off Holding paper...

Page 69: ...int head drive signal waveform is normal 4 YES Replace printer mechanism NO Printing operation is normal YES Paper feed operation is normal YES Ribbon feed operation is normal YES Terminates self printing Check host computer connection Turn power off and check I F cable Turn power on Send print program from host computer NO C NO 2 3 4 See 4 and 5 waveform in item 5 of Chapter 6 1 Replace main logi...

Page 70: ...ic board 2 Replace printer mecha nism 3 Replace control panel board Replace printer mechanism Replace power supply unit C D NO A B 3 NO NO NO YES Printing begins YES Printing operation normal YES Stop print program END Carriage moves with hand YES Output 40V 5V of power supply unit is normal 6 NO Turn power off Fuse blows out YES Replace fuse Remove connector CN3 from main logic board Turn power o...

Page 71: ...Pin 1 and Pin 2 of CN1 NO NO A 4 Output of power supply unit is normal 7 YES Turn power off Connect connector CN3 from main logic board Turn power on Fuse blows out YES Replace fuse 1 Replace main logic board 2 Replace printer mechanism 3 Replace control panel board Replace power supply unit ...

Page 72: ... NO Check hardware or host computer print program NO A E On line switch goes ON OFF YES On line lamp drive signal is normal YES Replace control panel board 8 See 8 waveform in item 5 of Chapter 6 NO 1 Replace control panel board 2 Replace main logic board Replace main logic board 1 Replace I F cable 2 I F cartridge 3 Replace main logic board ...

Page 73: ...OM 2 Check relevant circuit NO NO NO NO See 4 2 Power Supply Circuit Abnormal 4 Repair by Parts Replacement 4 1 Does not Operate at All with Power on 10 See 2 waveform in item 5 of Chapter 6 11 See 1 waveform in item 5 of Chapter 6 START 40V 5V are supplied 9 YES RESET signal becomes HIGH 10 YES Crystal waveform is normal 11 YES ROM OE signals become LOW YES Carriage motor abnormal Check operation...

Page 74: ...of CN1 5V Line 5V 5 Between Pin 1 and Pin 2 of CN1 YES 4 2 Power Supply Circuit Abnormal 1 Remove connector CN3 from main logic board Replace Fuse F1 Fuse is blown again NO YES Replace 1 Power supply unit START Fuse F1 is blown NO Check the 5V line of the main logic board END ...

Page 75: ...ck and replace 1 TA 8 2 Gate array 4 3 Defective Motor Operation 12 See 7 waveform in item 5 of Chapter 6 13 See 6 waveform in item 5 of Chapter 6 Paper Feed Motor Carriage Motor START CR ø1 ø2 ø3 ø4 are normal 13 YES Replace CR motor Check operation END Check and replace 1 TA7 2 Gate array ...

Page 76: ...r to item 4 2 Check and replace 1 Gate array 2 CPU Check and replace 1 TR10 TR14 2 Gate array Head energizing control signal is normal 14 YES Check and replace 1 Print head END Check and replace TA1 HD1 2 3 4 TA2 HD5 6 7 8 TA3 HD9 10 11 12 TA4 HD13 14 15 16 TA5 HD17 18 19 20 TA6 HD21 22 23 24 Adjust gap Refer to Chapter 3 A specific pin does not work NO Print is light as whole NO YES YES ...

Page 77: ... array 3 CPU NO YES 4 5 Defective Interface Operation START Press on line switch to take on line Send print program from host computer Is I F signal normal 15 YES Incorrect print generated NO Check operation END 15 See 8 waveform in item 5 of Chapter 6 ...

Page 78: ...Drive Collector of TR9 Lower HD1 Data Pin 67 of IC4 Time Div 5 ms Time Div 50µs Volt Div Upper 2V Volt Div Upper 1V Lower 2V Lower 2V 5 Print Head Control Signal and Waveform 6 Carriage Motor Control Signal and Driving Signal Upper HD1 Data Pin 67 of IC4 Upper Carriage ø1 Control Signal Pin 31 of IC4 Lower HD1 Pin 2 of TA1 Lower Carriage ø1 Driving Signal Pin 3 of CN8 Time Div 0 1 ms Time Div 2 ms...

Page 79: ...llel type Only Driving Signal Upper LF ø1 Control Signal Pin 40 of IC4 Upper STB Pin 1 of CN1 Lower LF ø1 Driving Signal Pin 1 of CN9 Lower BUSY Pin 11 of CN1 Time Div 2 ms Time Div 50 ms Volt Div Upper 5V Volt Div Upper 5V Lower 20V Lower 2V 5V 0V 0V 100V 5V 0V 4V 0V ...

Page 80: ... 76 ...

Page 81: ...mbly Drawing 78 1 2 Parts List 79 2 Printer Mechanism 80 2 1 Disassembly Drawing 80 2 2 Parts List 82 3 Sub Assembly 84 3 1 Lower Cace Unit 84 3 2 Sheet Guide Unit 85 3 3 Printer Cover Unit 86 3 4 Upper Case Unit 87 3 5 Tractor Unit 88 3 6 Serial Parallel Converter Option 89 3 7 Carriage Unit 90 3 8 Platen Assy 91 3 9 Roller Angle Assy 92 3 10 Frame Holder Unit 93 3 11 Paper Guide Unit 94 3 12 Fra...

Page 82: ... 78 1 Printer Assembly 1 1 Disassembly Drawing 13 9 2 16 B 18 19 16 A 1 22 23 4 3 20 A 6 21 14 12 20 7 8 17 16 10 16 16 11 5 B 20 19 20 15 ...

Page 83: ... INLET HOLDER HBF 15 1 12 83912450 SWITCH HOLDER HBF 15 1 13 2 83912440 REAR COVER HBF 15 1 S 2 83912441 REAR COVER HBF 15 1 S 14 82902600 RIBBON HOLDER 701C 1 S 15 2 04020010 STOP RING SE2 0 1 S 2 00630304 SCREW TR 3 3 1 S 16 01925001 MECHANISM HOLDER SCREW HBF 15 5 S 17 01914036 SCREW TR 4 5 WS 1 S 18 01914030 SCREW TAT 4 15 PT 5 S 19 01903088 SCREW TAT 3 6 WS 2 S 20 01903038 SCREW TAT 3 10 PT F...

Page 84: ...wing 11 3 R 12 2 12 1 36 57 58 5 1 2 5 2 2 2 4 2 3 2 1 10 1 10 2 10 3 35 39 56 57 57 55 40 58 59 13 1 13 2 13 3 45 45 5 1 58 J a 15 58 14 58 a 58 57 9 A 46 L 49 6 44 44 7 58 58 F C 1 54 H B G M 46 O Q J K 4 8 2 8 2 8 1 T D E N P D E 5 a 58 61 60 ...

Page 85: ...9 41 49 18 19 35 21 47 43 26 48 42 29 29 50 F 50 24 20 58 27 58 22 38 R S N P H L B 25 47 34 53 33 48 52 23 17 58 50 58 24 51 47 47 27 23 29 28 47 30 31 41 37 58 58 58 16 46 50 32 T Q G K A O C 58 20 47 63 62 ...

Page 86: ...T 695 1 2 86430121 FRAME HOLDER UNIT 695 1 12 86430110 PF ROLLER R UNIT 695 1 12 1 83201130 PAPER FEED ROLLER 695 6 S 12 2 2 81361281 PF ROLLER SHAFT R 695 1 2 81361282 PF ROLLER SHAFT R 695 1 13 86430100 PE LEVER UNIT 695 1 S 13 1 86430530 PE LEVER ANGLE ASSY 695 1 13 2 83401430 PAPER DETECT LEVER 695 1 13 3 04020010 STOP RING SE2 0 1 14 86430090 PAPER GUIDE UNIT 695 1 15 86430080 FRAME BASE UNIT...

Page 87: ...0017 STOP RING SE5 0 6 S 48 04020016 STOP RING SE4 0 2 S 49 04020015 STOP RING SE3 0 3 S 50 04012501 ROLL PIN SP2 5X10 4 S 51 02307050 POLY SLIDER WP7X0 5 1 S 52 02304050 POLY SLIDER WP4X0 5 1 S 53 02210001 PLAIN WASHER WF10X18X1 6 1 S 54 01903035 SCREW TR 3 10 FL 2 S 55 01903031 SCREW TR 3 6 FL 1 S 56 01604100 SCREW TR 4 10 4 S 57 00630704 SCREW TR 3 7 5 S 58 00630504 SCREW TR 3 5 21 S 59 0190263...

Page 88: ...ER CASE CHASSIS HBF 15 1 5 5 NPN SHEET 280X37X10 1 5 6 NPN SHEET F HBF 15 1 5 7 80995470 RUBBER FOOT 20X20 HBF 15 6 5 8 80704120 MESHED GROUND WIRE 150 HBF 15 1 5 9 02010401 HEXAGON NUT NH4 1 1 5 10 00930803 SCREW TAT 3 8 PT 12 DRWG NO REV PARTS NO PARTS NAME Q TY REMARKS RANK 3 Sub Assembly 3 1 Lower Cace Unit 5 10 5 1 5 7 5 9 5 3 5 2 5 4 5 6 5 5 5 8 ...

Page 89: ...Y REMARKS RANK 6 1 83904920 GUIDE HINGE ARM HBF 15 1 6 2 83904910 SLIDER HBF 15 2 6 3 83904830 ADJUSTER L HBF 15 1 6 4 83904820 ADJUSTER R HBF 15 1 6 5 2 83904811 SHEET GUIDE HBF 15 1 2 83904812 SHEET GUIDE HBF 15 1 6 6 2 83026610 ADJUSTER GUIDE HBF 15 1 2 83026611 ADJUSTER GUIDE HBF 15 1 ...

Page 90: ...S 7 2 83026510 PRINTER COVER HBF 15 1 7 3 NPN FRONT GUIDE SUPPORTER JBA 15H 1 7 4 80060440 BRAND PLATE HBF 15 1 7 5 01903038 SCREW TAT 3 10 PT FL 5 DRWG NO REV PARTS NO PARTS NAME Q TY REMARKS RANK 3 3 Printer Cover Unit 7 4 7 1 7 2 7 5 7 3 ...

Page 91: ...E HBF 15 1 8 1 2 NPN SHEET G HBF 15 1 8 1 3 NPN SHEET C HBF 15 2 8 2 2 83026482 UPPER CASE HBF 15 1 S 8 2 2 83026483 UPPER CASE HBF 15 1 S 8 3 NPN RUBBER CUSHION B HBF 15 1 8 4 NPN RUBBER CUSHION A HBF 15 1 8 5 NPN SHEET 56X31X20 2 8 6 NPN SHEET 580X25X10 1 8 7 NPN SHEET D HBF 15 1 8 8 NPN SHEET B HBF 15 1 8 9 NPN SHEET 90X40X20 2 8 10 80088301 OPERATION SHEET HBF 15 1 8 11 01914030 SCREW TAT 4 15...

Page 92: ...450 TRACTOR LEVER L 695 1 9 4 83401440 TRACTOR LEVER R 695 1 9 5 83000260 TRACTOR FRAME L 695 1 9 6 83000250 TRACTOR FRAME R 695 1 9 7 NPN TRACTOR STAY 695 1 9 8 80906100 TRACTOR SUB UNIT L F1 1 S 9 9 80906090 TRACTOR SUB UNIT R F1 1 S 9 10 04020017 STOP RING SE5 0 3 S DRWG NO REV PARTS NO PARTS NAME Q TY REMARKS RANK 3 5 Tractor Unit 9 10 9 3 9 5 9 8 9 10 9 1 2 9 10 9 2 9 7 9 2 9 9 9 6 9 1 3 9 2 ...

Page 93: ...ER CASE UNIT SPC 8K 1 23 5 NPN CORD HOLDER SPC 8K 1 23 6 NPN SCREW TAT 3 12 PT FL 3 23 7 NPN SCREW TAT 3 8 PT FL 1 23 8 NPN CORD HOLDER PLATE SPC 8K 2 NPN FERRITE CORE HF70RU12X5 1 DRWG NO REV PARTS NO PARTS NAME Q TY REMARKS RANK 3 6 Serial Parallel Converter Option 23 8 23 2 23 5 23 7 23 1 23 3 23 4 23 6 23 6 23 6 ...

Page 94: ...ON CASSETTE GEAR 921 1 S 3 3 7 83101370 GEAR 48X0 3 965 1 S 3 3 8 83100721 RF IDLER GEAR 37X0 3 905 2 S 3 4 86432340 CARRIAGE BOARD UNIT 695 1 3 4 1 80705610 FLAT CABLE 19X695 695 2 S 3 5 83200990 REAR ROLLER 981 1 S 3 6 NPN ROLLER SHAFT 965 2 3 7 81210510 BUSHING 3X8 8X6 695 1 S 3 8 80995540 FELT B 695 1 3 9 80995311 FELT A 695 1 3 10 80995110 FELT 505 1 3 11 80902260 TIMING BELT HTD104 393X9 5 1...

Page 95: ...WG NO REV PARTS NO PARTS NAME Q TY REMARKS RANK 3 8 Platen Assy 7 1 83201080 BUSHING F10X14X5 5 701C 1 7 2 80202320 PLATEN 695 1 7 3 04020018 STOP RING SE8 0 1 7 4 04012503 ROLL PIN SP2 5X14 1 7 3 7 1 7 4 7 2 ...

Page 96: ... ROLLER ANGLE 695 1 9 5 1 80531250 PF ROLLER SPRING 695 2 1 80531251 PF ROLLER SPRING 695 2 9 6 80520520 SPRING C090 070 0150 1 9 7 04020017 STOP RING SE5 0 3 9 8 02307050 POLY SLIDER WP7X0 5 2 9 9 02207001 PLAIN WASHER WF7X16X1 0 1 3 9 Roller Angle Assy DRWG NO REV PARTS NO PARTS NAME Q TY REMARKS RANK 9 4 9 1 1 9 2 9 7 9 3 9 1 9 7 9 9 9 6 9 8 9 5 9 5 9 2 ...

Page 97: ...O REV PARTS NO PARTS NAME Q TY REMARKS RANK 11 1 86031030 RUBBER BUSHING B UNIT 941 4 11 2 82501510 RELEASE SPRING 695 5 11 3 2 82040710 FRAME HOLDER 695 1 2 82040711 FRAME HOLDER 695 1 11 4 00630404 SCREW TR 3 4 5 11 3 11 4 11 2 11 1 ...

Page 98: ...it 14 1 86430480 PAPER GUIDE C ASSY 695 1 14 2 82040730 PAPER GUIDE B 695 1 14 3 82040720 PAPER GUIDE A 695 1 14 4 04011501 ROLL PIN SP1 5X6 6 DRWG NO REV PARTS NO PARTS NAME Q TY REMARKS RANK 14 1 14 4 4 14 4 14 4 14 3 14 2 ...

Page 99: ...16 6 83101940 CLUTCH GEAR 695 1 S 16 7 80531190 INDEX LEVER SPRING 695 1 16 8 80521250 SPRING C060 035 0112 1 16 9 NPN FASTENER T18S 1 16 10 04020016 STOP RING SE4 0 1 16 11 04020015 STOP RING SE3 0 3 16 12 02304050 POLY SLIDER WP4X0 5 2 16 13 00926603 SCREW TAT 2 6 6 CT 3 3 12 Frame L Unit DRWG NO REV PARTS NO PARTS NAME Q TY REMARKS RANK 16 1 1 16 5 16 1 a 16 3 16 4 16 11 16 11 16 7 16 13 16 8 b...

Page 100: ... 695 1 S 17 5 83100110 GEAR 26X0 5 1 S 17 6 80521250 SPRING C060 035 0112 1 17 7 04020015 STOP RING SE3 0 1 17 8 04020010 STOP RING SE2 0 1 17 9 02304050 POLY SLIDER WP4X0 5 2 17 10 02010301 HEXAGON NUT NH3 1 2 3 13 Frame R Unit DRWG NO REV PARTS NO PARTS NAME Q TY REMARKS RANK 17 1 17 10 17 10 17 8 17 7 17 5 17 6 17 2 17 3 17 4 17 9 17 9 ...

Page 101: ... 97 Blank Page ...

Page 102: ... 98 4 Wiring Scheme of Printer ...

Page 103: ... 99 ...

Page 104: ... 100 5 Electrical Parts 5 1 Main Logic Board 5 1 1 Circuit Diagram ...

Page 105: ... 101 ...

Page 106: ... 102 ...

Page 107: ... 103 Blank Page ...

Page 108: ... 104 5 1 2 Component Layout ...

Page 109: ... 105 ...

Page 110: ...D24FB2T 1 2 08020052 ZENER DIODE RD33FB2 T 1 ZD2 08020054 ZENER DIODE RD27FB2 T 1 ZD3 2 08020063 ZENER DIODE RD24FB2T 1 2 08020052 ZENER DIODE RD33FB2 T 1 ZD4 08020054 ZENER DIODE RD27FB2 T 1 ZD5 08020139 ZENER DIODE HZ2BLLTD 1 ZD6 08020131 ZENER DIODE RD36JSB3 1 ZD7 08020132 ZENER DIODE UZ20BCA 1 TA1 6 07650041 TRANSISTOR ARRAY MP4303 6 TA7 08043001 FET ARRAY UPA1501H 1 TA8 08043002 FET ARRAY SMA...

Page 111: ...NPN CERA CAPA 4700PF 50V 2 C58 59 NPN CERA CAPA 470PF 50V 2 C60 NPN CHEM CAPA 1000UF 50V 1 C61 62 NPN CAPACITOR 0 022UF 25V 2 C63 NPN CERA CAPA 0 022UF 50V 1 C64 NPN CHEM CAPA 47UF 10V 1 C65 NOT MOUNTED C66 NPN CERA CAPA 2200PF 400V 1 R1 NPN RD RESISTOR 3 3 K OHM 1 6W 1 R2 NOT USED R3 NPN RD RESISTOR 2 2 K OHM 1 6W 1 R4 11 NPN RD RESISTOR 4 7 K OHM 1 6W 8 R12 NPN RD RESISTOR 1 K OHM 1 6W 1 R13 NPN...

Page 112: ... 220 OHM 1 6W 1 R98 NOT USED R99 NPN RD RESISTOR 220 OHM 1 6W 1 R100 NOT USED R101 NPN RD RESISTOR 220 OHM 1 6W 1 R102 103 NPN RD RESISTOR 10 K OHM 1 6W 2 R104 NPN RN RESISTOR 1 K OHM 1 6W 1 1 R105 NPN RN RESISTOR 5 1 K OHM 1 6W 1 R106 NPN RD RESISTOR 4 7 K OHM 1 6W 1 R107 NPN RD RESISTOR 18 K OHM 1 6W 1 R108 NPN RD RESISTOR 220 OHM 1 6W 1 R109 NPN RD RESISTOR 4 7 K OHM 1 6W 1 R110 NPN RD RESISTOR...

Page 113: ...ECTOR 53253 0910 1 CN8 09100267 CONNECTOR 5483 06A 1 CN9 09100612 CONNECTOR 52147 0510 1 CN4A 10A 80705800 FLAT CABLE 17X481 HBF 15 1 CN4B 10B 80705810 FLAT CABLE 16X391 HBF 15 1 CN5 12 80705510 FLAT CABLE 13X251 HBF 12 1 FB1 09990737 BEADS INDUCTOR RH035047AT Y7 1 FB2 09990736 BEADS INDUCTOR RH035047RT Y7 1 FB3 09990737 BEADS INDUCTOR RH035047AT Y7 1 FB4 09990736 BEADS INDUCTOR RH035047RT Y7 1 FB...

Page 114: ...W1 5 2 09010041 PUSH SWITCH SKHHAL 5 2 09010061 PUSH SWITCH EVQ PAE 04M 5 CN12 09100624 CONNECTOR 51048 1300 1 DRWG NO REV PARTS NO PARTS NAME Q TY REMARKS RANK 5 2 2 Component Layout 5 2 3 Parts List Control Panel Board 5 2 Control Panel Board 5 2 1 Circuit Diagram ...

Page 115: ...Circuit Diagram 5 3 2 Component Layout 5 3 3 Parts List Relay Board DRWG NO REV PARTS NO PARTS NAME Q TY REMARKS RANK CN10A 09100637 CONNECTOR 51048 1700 1 CN10B 09100688 CONNECTOR 51048 1600 1 CN11A B 09100419 CONNECTOR HLEM19S 1 2 ...

Page 116: ... 112 5 4 Power Supply Unit 5 4 1 Circuit Diagram ...

Page 117: ... 113 5 4 2 Component Layout ...

Page 118: ...NPN FILM CAPA 0 1UF 275V 1 C7 NPN CERA CAPA 2200PF 400V 1 C8 NPN CHEM CAPA 330UF 200V 1 C9 NPN FILM CAPA 0 047UF 630V 1 C10 11 2 NPN CERA CAPA 220PF 1KV 2 2 NPN CERA CAPA 220PF 1KV 2 C12 NPN CHEM CAPA 22UF 35V 1 C13 NPN FILM CAPA 0 15UF 50V 1 C14 2 NPN FILM CAPA 330PF 100V 1 2 NPN FILM CAPA 330PF 100V 1 C15 NPN FILM CAPA 0 047UF 50V 1 C16 NPN FILM CAPA 6800UF 50V 1 C17 NPN CHEM CAPA 2200UF 16V 1 C...

Page 119: ...ESISTOR RF25SC R1K A 2 CN1 NPN CABLE UNIT 05X135CC 1 F1 09990070 FUSE 215 5A 250V ZB 1 NPN FUSE HOLDER PFC5000 2 L1 2 2 NPN LINE FILTER ELF 18D650J 2 2 NPN NOISE FILTER LFZ2805V06 2 L3 NPN INDUCTOR LAL03TA390K 1 Q1 NPN FET 2SK2275 1 Q2 NPN TRANSISTOR 2SC1740SE 1 SA1 NOT MOUNTED SW 2 NPN SEESAW SWITCH T881SGSS9 1 2 NPN SEESAW SWITCH SF W1S1A14GG 1 T1 NPN CONVERTER TRANSFORMER HBF15D 1 TA1 NPN TRIAC...

Page 120: ... 116 6 Serial Parallel Converter Board Option 6 1 Wiring Scheme ...

Page 121: ...01 104 NPN CHEM CAPA 4 7UF 25V 4 C105 NPN CAPACITOR 0 1UF 50V 1 CN101 09100461 CONNECTOR DBLC J25SAF 23L8 1 CN102 09100462 CONNECTOR 5532 08A 1 J101 108 93930006 JUMPER WIRE STP122 8 P 10mm 6 2 2 Component Layout 6 2 3 Parts List DRWG NO REV PARTS NO PARTS NAME Q TY REMARKS RANK 6 2 I F Board 6 2 1 Circuit diagram ...

Page 122: ... 118 6 3 CPU Board 6 3 1 Circuit diagram ...

Page 123: ...IS ARRAY 4 7K OHM 1 16W8EL 1 C1 NPN CERA CAPA CHIP 0 1UF 25V 1 C2 NPN TANTALUM CAPA CHIP 4 7UF 10V 1 C3 NPN CERA CAPA CHIP 0 1UF 25V 1 C4 NOT USED C5 6 NPN CERA CAPA CHIP 1000PF 50V 2 R1 NPN CHIP RESISTOR 4 7 K OHM 1 10W 1 XTAL1 09250039 CERA OSCILLATOR EFO W4914B5 1 DSW1 09090018 DIP SWITCH KSD08 1 SW1 09010047 PUSH SWITCH SKHHLS0001 1 CN1A 1B 80706070 INTERFACE CABLE SPC 8K 1 CN2 09100463 CONNEC...

Page 124: ...rters STAR MICRONICS CO LTD 536 Nanatsushinya Shimizu Shizuoka 424 0066 Japan Tel 0543 47 0113 Telefax 0543 48 5013 STAR MICRONICS ASIA LTD Rm 1802 6 18 F Tower II Enterprise Square 9 Sheung Yuet Road Kowloon Bay Hong Kong Tel 852 2796 2727 Telefax 852 2799 9344 ...

Search results

Summary of Contents for LC-8521

Reviews:

Related manuals for LC-8521

Brands by name

Popular brands

Star Micronics LC-8521, Technical Manual

Search results

Summary of Contents for LC-8521

Reviews:

Related manuals for LC-8521

Brands by name

Popular brands