Epson LQ-1070+ Service Manual Download

Page: 93 / 135

REV.-B

Printing is Faulty During Self-Test, but Carriage Operation is Normal

S T A R T

Set the head

ADJUST to the 2nd

position, and perform

and CN7 connecting the

BOARD

MAIN

a n y

and the PRINTER MECHANISM.

Perform bidirectional
printing adjustment.

the fault corrected?

Replace the printhead

Yes

the fault corrected?

Replace the BOARD
AS

MAIN.

END

Summary of Contents for LQ-1070+

Page 1: ...EPSON TERMINAL PRINTER LG1 570 lo7cJ L 4000566 REV B ...

Page 2: ...ect to change without notice All efforts have been made to ensure the accuracy of the contents of this manual However should any errors be detected SEIKO EPSON would greatly appreciate being informed of them The above notwithstanding SEIKO EPSON can assume no responsibility for any errors in this manual or the consequences thereof Copyright 1991 by SEIKO EPSON CORPORATION Nagano Japan i ...

Page 3: ...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 POWER SUPPLY AND OTHER ELECTRONIC COMPONENTS WARNING REPAIRS ON EPSON PRODUCT 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...

Page 4: ...r 1 Chapter 2 Chapter 3 Chapter 4 Chapter 5 Chapter 6 Provides a general product overview lists specifications and illustrates the main components of the Describes the theory of printer operation printer Includes a step by step guide for product disassembly and assembly Includes a step by step guide for adjustment Provides Epson approved techniques for troubleshooting Describes preventive maintena...

Page 5: ...0 1991 1st issue B Sept 6 1991 Added information for the LQ 1 070 l i l ii 1 1 1 8 1 10 1 11 1 24 1 26 1 28 2 i 2 ii 2 1 2 1 1 2 1 3 2 15 2 17 2 18 3 i 3 ii 3 5 3 20 4 i 4 1 4 4 4 6 5 i 5 1 5 5 5 9 5 11 5 19 6 i 6 1 6 4 A 1 A ii A 1 A 1 5 A 17 A 1 9 A 22 A 23 v ...

Page 6: ...REV A TABLE OF CONTENTS CHAPTER 1 GENERAL DESCRIPTION CHAPTER 2 OPERATION PRINCIPLES CHAPTER 3 DISASSEMBLY AND ASSEMBLY CHAPTER 4 ADJUSTMENTS CHAPTER 5 TROUBLESHOOTING CHAPTER 6 MAINTENANCE APPENDIX vi ...

Page 7: ...7 1 6 8 1 6 9 1 6 10 1 6 11 Self Test 1 20 Hexadecimal Dump Function 1 20 Paper out Detection and Forms Override Function 1 21 Error Conditions 1 21 Buzzer Operation 1 21 Printer Initialization 1 21 Default Values 1 22 Sheet Loading and Sheet Ejection 1 22 Tear off Function 1 23 LEVER G ADJUST 1 24 printer Protection for Heavy Duty Printing 1 25 MAIN COMPONENTS 1 26 1 7 1 C062 MAIN Board Main Cont...

Page 8: ...l 1 16 Self Test Printout 1 20 Hexadecimal Dump Function 1 20 Lever Positions 1 24 LQ 570 l 070 Component Layout 1 26 C062 MAIN Board 1 26 C062 PNL Board 1 27 C062 PSB PSE Board 1 27 Model 5El O 5E60 Printer Mechanism 1 28 Housing 1 28 LIST OF TABLES Interface Options 1 1 Optional Units 1 2 Specifications for Cut Sheets 1 4 Specifications for Cut Sheets Carbonless Duplicating Paper 1 5 Specificati...

Page 9: ...and auto loading rear insertion Use of continuous paper without removing CSF Attachment of standard tractor unit in either of two positions push pull Easy handling of cut sheets with the optional cut sheet feeder Two ways to insert cut sheets front top Auto loading The LQ 570 l 070 are equipped with the standard EPSON 8 bit parallel interface Various interface options ensure compatibility with a w...

Page 10: ... C80022 Tractor unit 1 36 column 7753 Fabric ribbon cartridge 80 column 7754 Fabric ribbon cartridge 1 36 column 7768 Film ribbon cartridge 80 columd 1 7770 Film ribbon cartridge 1 36 column When a part number in the table above is followed by an asterisk the last digit of the number varies depending on the country For example in the U S the model number for a single bin cut sheet feeder 80 column...

Page 11: ... or programmable in units of 1 360 inch Friction feed Front or rear side Tractor feed Front Friction without CSF Friction with CSF Tractor NOTE The points below provide precautions for bottom or rear side 77 6 msec 1 6 inch feed 2 2 inches per second ips continuous 77 6 msec 1 6 inch 2 2 ips continuous 77 6 msec 1 6 inch 2 2 ips continuous handling paper 1 Friction feed release lever in FRICTION P...

Page 12: ...ontal position of the pull tractor and push tractor sprockets Paper for multiple copies must be spot pasted beyond the perforation between the tractor holes Paper for copies must be a carbonless multi part paper Do not perform reverse feeds greater than 4 15 inch Do not perform reverse feeds after the paper end has been detected 4 Pull tractor feed release lever in PULL POSITION Paper must be load...

Page 13: ...n to 0 0197 in Differences in thickness within the printing area must be less than 0 25 mm 0 0098 in Weight 12 lb to 24 lb 40 g m2 to 91 g m2 Quality Bond paper standard paper airmail Copies Not available Printing on envelopes is available only at normal temperatures and only using top insertion Keep the longer side of the envelope horizontal during insertion Place the left edge of a No 6 envelope...

Page 14: ... 4 in 29 mm 1 14 in top insertion 31 mm 1 22 in front insertion or more when paper width is 392 mm 1 5 4 in to 420 mm 1 6 4 in Paper feed accuracy cannot be assured within 22 mm 0 87 in from the bottom edge of paper top insertion Paper feed accutacy cannot be assured within 40 2 mm 1 58 in from the bottom edge of paper front insertion Paper feed accuracy cannot be assured within 22 mm 0 87 in from...

Page 15: ...bbon cartridge Fabric Type 80 column 293 mm W X 34 mm H X 72 mm D 136 column 468 3 mm W X 34 mm H X 72 mm D Film Type 80 column 293 mm W X 34 mm H X 72 mm D 136 column 468 5 mm W X 34 mm H X 72 mm D Mean cycles between failures MCBF 3 million lines excluding printhead Mean time between failures MTBF 4000 power on hours POH 25 duty 200 million strokes black ribbon 100 million strokes film ribbon Sa...

Page 16: ...re range 5 to 35 degrees C 41 to 95 degrees F operating conditions 30 to 60 degrees C 22 to 140 degrees F in shipment container Humidity 10 to 80 RH operating 5 to 85 RH storage Resistance to shock 1 G within 1 ms operating 2 G within 1 ms storage Resistance to 0 25 G 55 Hz max operating vibration 0 50 G 55 Hz max storage Physical specifications 80 column Weight 6 1 kg approx 13 5 Ibs approx Dimen...

Page 17: ...nal EPSON Saris Serif 10 12 15 proportional EPSON Courier 10 12 15 EPSON Prestige 10 12 EPSON Script 10 12 EPSON Script C proportional OCR B 10 EPSON Orator 10 E P S O N O r a t o r S 1 0 EPSON Draft 10 12 15 Scalable fonts EPSON Roman 8 pt to 32 pt EPSON Saris Serif 8 pt to 32 pt Printing modes Selection and mixture of the following modes are allowed excluding 15 cpi condensed mode O Print qualit...

Page 18: ...printer switches back into normal mode to print emphasized condensed or download characters and bit images Printing speed See tables 1 8 and 1 9 Printing columns See Table 1 8 Character matrix See Table 1 10 Character size See Table 1 10 Table 1 8 Printing Text Mode T Printable Character Pitch Printing Speed CPS Print Pitch Condensed Columns cpi Draft LQ HSD 10 0 80 136 10 210 70 225 1 137 233 17 ...

Page 19: ... I Double speed dual density I 120 I 960 1632 I 21 0 8 Quadruple density 240 1920 3264 10 5 8 CRT graphics 80 640 1088 10 5 8 I CRT graphics II I 90 I 720 1224 I 14 0 24 Single density 60 480 8 16 21 0 24 Dual density 120 960 1632 10 5 24 CRT graphics II 90 720 224 14 0 24 Triple density 180 1440 2448 7 0 I 24 Hex density 360 2880 4896 7 0 136 column dpi dots per inch ips inches per second 1 11 ...

Page 20: ...ional Max 37 X 22 360 2 6 X 3 1 180 Min 18 X 22 360 1 0 x 3 1 LQ proportional condensed 360 180 360 LQ proportional super subscript Max 28 X 16 360 1 8 X 2 3 180 Min 12 X 16 360 0 7 X 2 3 LQ proportional super subscript I I 360 I I 180 condensed 360 NOTES HDD is horizontal dot density in dots per inch Face matrix and character size indicate the size of the maximum character This value is dependent...

Page 21: ... 23 24 L E F T s P A c E Subscript character R I G H T s P A c E 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Typical LQ character L E F T s P A c E Ascender area I Descender area R I G H T s P A c E Face width 9 29 dots Typical LQ excluding 15 pitch 15 dots for 15 pitch and condensed La 36 dots 10 CPI 360 DPI 30 dots 12 CPI 360 DPI 24 dots 15 CPI 360 DPI 21 dots condensed 10 CPI...

Page 22: ...nnector Pin Assignments and Signal Functions Pin No Signal Name Return Pin No Dir Functional Description 1 STROBE 19 IN STROBE pulse to read the input data Pulse width must be more than 0 5ps Input data is latched at falling edge of this signal 2 DATA 1 20 IN Parallel input data to the printer 3 DATA 2 21 IN HIGH level means data 1 4 DATA 3 22 IN LOW level means data O 5 DATA 4 23 IN 6 DATA 5 24 I...

Page 23: ... the printer 33 GND Ground for twisted pair grounding 34 Not used 35 OUT Always HIGH Pulled up to 5V through 3 3K ohm resistor 36 SLCT IN IN DC l DC3 control is disabled NOTES 1 Dir indicates the direction of the signal flow as viewed from the printer 2 Return Pin No denotes a twisted pair return line 3 The cable used must be shielded to prevent noise 4 All interface conditions are based on TTL le...

Page 24: ... FEED Button Pressing this button performs a line feed and holding down the button performs a form feed irrespective of the PAUSE RUNNING condition This button is also used in conjunction with the ALT button as the micro reverse feed 4 LOAD EJECT Button Pressing this button loads or ejects the paper Refer to Section 1 6 8 Sheet Loading and Sheet Ejection This button is also used in conjunction wit...

Page 25: ...2 PAUSE orange Lit 3 Lit 4 Lit 5 when the printer is in PAUSE mode no printing no paper feeding and not accepting data TEAR OFF orange when the sheet is advanced to the tear off position DATA orange when the printer has received data from the host PAPER OUT red Lit when the paper out detector senses no paper Refer to Section 1 6 3 Paper out Detection and Forms Override Function 6 MULTI PART green ...

Page 26: ... Table 1 12 Settings for DIP Switch 1 SW1 No I Description 1 2 International character set and PC selection 3 I 4 I Charactertable s e l e c t i o n I 5 I Graphic print direction I 6 I High speed draft 7 Input buffer 8 l inch skiD continuous aDer ON OFF Factory Setting ON See Table 1 14 ON ON Graphic Italic OFF Unidir Bidir OFF Invalid Valid OFF Invalid Valid OFF ON I OFF I OFF Table 1 13 Settings...

Page 27: ...F ON Italy 437 OFF OFF OFF Spain 1 437 L When SW 1 4 is OFF If graphic table was selected by ESC t 1 PC becomes 437 When SW 1 4 is ON if italic table was selected by ESC t O country setting becomes U S Table 1 15 Page Length 2 1 2 2 Page Length OFF OFF 11 inches ON OFF 12 inches OFF ON 8 5 inches ON ON 70 6 inches 1 5 2 Jumper Setting If Jumper 3 is connected to GND the SLCT IN signal is fixed to ...

Page 28: ... f f t f f f f f on on on I I High s p e e d d r a f t SWI 6 Va 1 id off I n v a l i d on R e c e i v e b u f f e r SW1 7 Valid off I nva 1 i d o n 1 i n c h skip SW1 8 1 rival id o f f I to f I k SW2 1 2 2 o f f o f f t i Figure 1 8 Self Test Printout 1 6 2 Hexadecimal Dump Function To put the printer in hex dump mode power it on while pressing both the LOAD EJECT and LINE FEED FORM FEED buttons ...

Page 29: ...not detected at printer mechanism initialization Home position is detected during printing The PAUSE button is pressed and the printer enters PAUSE condition A paper out is detected after performing paper loading operation If parallel interface is selected the following interface signals are output to indicate the error and to stop data transmission The BUSY signal becomes HIGH The ERROR signal be...

Page 30: ...ght margins Line spacing Vertical tabs Horizontal tabs Family number of type style Download characters Character spacing Printing effects Condensed printing Printer condition The current paper position becomes the top of form position Released 1 6 inch Cleared Every 8 characters relative Last font selected from the panel Kept software initialization Cleared hardware initialization 10 cpi Cleared e...

Page 31: ...alid for the next loaded positicrn At this time the LOAD EJECT button advances the paper forward and the LINE FEED FORM FEED button moves the paper backward The adjusted top of form position for continuous paper is saved in EEPROM but the setting for cut sheet paper is not saved 1 6 9 Tear off Function The below tear off function is limited under the push tractor mode Auto tear off The auto tear o...

Page 32: ...lized If subsequent data is sent to the printer and the printer is in the RUNNING condition the paper returns to its original position automatically and printing starts If the TEAR OFF button is pressed again while the paper is advanced to the tear off position paper returns to its original position whether the printer is in PAUSE or RUNNING condition I 1 6 10 LEVER G ADJUST Operation The LEVER G ...

Page 33: ... at first However as the head temperature decreases print speed increases to normal speed automatically If the head temperature continues to increase at the lower speed printing is stopped or resumed as temperature increases or decreases If the voltage supplied to the head drive circuit drops below its minimum limit as a result of heavy duty printing printing is interrupted immediately When the po...

Page 34: ...echanism C062 PSB PSE Board C062 MAIN Board I r 1 Y 7 U 0 l l i 9 p u xx 1 d 1 rlq i h 11 J Printer Mechanism M 5E60 Printer Mechanism M 5E 10 LQ 570 LQ 1 070 Figure 1 11 LQ 570 1070 Component Layout 1 7 1 C062 MAIN Board Main Control Circuit Board The C062 MAIN Board for the LQ 570 consists of a TMP90C041 N 8 bit CPU an E05A50 gate array a PROM 5 12K a PSRAM 256 K a mask ROM character generator 2...

Page 35: ...1 13 C062 PNL Board 1 7 3 C062 PSB PSE Board Power Supply Circuit Board The power supply unit consists of a switching regulator circuit which converts the AC line voltage to the DC voltages for example 35V and 5V used by the printer The C062 PSB board is 120V input type and the C062 PSE board is 220 240V input type o f o m OFOM a o I D E o Figure 1 14 C062 PSB PSE Board 1 27 ...

Page 36: ...s This printer mechanism allows three ways of paper insertion 1 7 5 Housing The LQ 570 l 070 Figure 1 15 Model 5El O 5E60 Printer Mechanism This picture shows an 80 column Printer T h e M 5E1O a n d M 5E60 differ in width only housing consists of the upper lower and front cases The front case houses the control panel board The lower case contains the printer mechanism the main control circuit boar...

Page 37: ... 3 Figure 2 4 Figure 2 5 Figure 2 6 Figure 2 7 Figure 2 8 Figure 2 9 Control circuit Operation Overview 2 13 Reset Circuit 2 15 Sensor Circuits 2 16 MOTOR CR Drive Circuit 2 17 MOTOR PF Drive Circuit 2 18 Printhead Drive Circuit S S 2 19 Parallel Interface Circuit 2 20 EEPROM Control Circuit 2 20 LIST OF FIGURES HOW the PrintheadWorks 2 1 Carriage Movement 2 2 Paper Thickness Gap LEVER G ADJUST Mo...

Page 38: ...T Signal Timing 2 16 Figure 2 21 Sensor Circuit Block Diagram 2 16 Figure 2 22 MOTOR CR Drive Circuit 2 17 Figure 2 23 MOTOR PF Motor Drive Circuit 2 18 Figure 2 24 Printhead Drive Circuit 2 19 Figure 2 25 Head Drive Signal Output Timing 2 19 Figure 2 26 Parallel Interface Circuit 2 20 Figure 2 27 EEPROM Control Circuit 2 20 LIST OF TABLES Table 2 1 Paper Advance Methods and Paper Paths 2 3 Table ...

Page 39: ... This induced force causes the plate to approach the coil rod and the associated dot wire is rapidly ejected to impact on the platen The dot wire presses the ink ribbon up against the paper as it hits the platen and in this way prints a dot on the paper As soon as the current througk the coil is switched off the force induced in the coil rod stops The plate then returns to its original position it...

Page 40: ...2 Carriage Movement The paper thickness LEVER G ADJUST allows the printer to use different weights of paper different thicknesses The user controls this lever and alters the platen gap on the SHAFT CR GUIDE by changing its position Changing the position of the lever rotates the CHAFT CR GUIDE and moves the carriage either toward or away from the PLATEN Moving the paper thickness LEVER G ADJUST to ...

Page 41: ...Advance Method Rear Front Bottom Top Entrance Entrance Entrance Entrance Friction Feed No OK No OK Push Tractor OK No No No Pull Tractor No OK OK No Push pull Tractor Feed OK No No No 2 1 3 1 Paper Advance Mechanisms This section describes how the friction feed and tractor feed mechanisms work to advance the paper in the printer Friction Feed Method The paper is held between the platen and paper a...

Page 42: ... when turning in the direction of the black arrow results in pushing the paper through the mechanism During tractor feeding the LEVER G ADJUST is set to the tractor position to disengage the friction drive This releases the pressure between the paper advance roller and the platen Figure 2 5 illustrates push tractor operation Paper Continuous L ROLLER ASSY PAPER EJECT I P PLATEN COMBINATION GEAR 8 ...

Page 43: ...paper tension unit Figure 2 6 illustrates pull tractor operation tractor when paper is inserted through the bottom path Paper Continuous o TRACTOR ASSY PLATEN SPUR GEAR 16 Gear COMBlNATK3N GEAR 8 5 30 Figure 2 6 Pull Tractor Operation Push Pull Tractor Method This is a combination of the push tractor and pull tractor methods TWO tractors are used one in f of and one behind the paper entrance to ad...

Page 44: ...ELEASE Movement 2 1 3 2 Paper Insertion Entrances This section describes the different ways to feed paper into the printer Top entrance paper insertion When you feed paper into the printer through the top entrance the method to advance the paper is friction feed There are two paper out detectors the front paper out detector is in front of the PRINTER MECHANISM and the rear paper out detector is be...

Page 45: ... detector senses when run out Paper Continuous ROLLER ASSY PAPER EJECT Printhead PAPER GUIDE TRACTOR ASSY DETECTOR ASSY Paper Feed Roller Figure 2 10 Paper Path for Rear Entrance Push Tractor Feed Paper Continuous TRACTOR ASSY Printhead TRACTOR ASSY DETECTOR ASSY PE REAR the paper can the paper has Paper F ed Roller Figure 2 11 Paper Path for Rear Entrance Push Pull Tractor Feed 2 7 ...

Page 46: ...gh the bottom entrance the pull tractor advances the paper The front paper out detector senses when the paper runs out Paper Continuous h M TRACT RA S PF Drive Roller C R YPEFR NTWP aper eea o er From Bottom Insertion Figure 2 12 Paper Path for Bottom Entrance Pull Tractor Feed 2 8 ...

Page 47: ...t paper out detector senses when the paper runs out Printhead Paper Cut sheet DETECTOR ASSY ROLLER ASSY PAPER PF Drive Roller PE FRONT Paper Feed From Front Insertion Figure 2 13 Paper Path for Front Entrance DETECTOR ASSY PE Roller Friction Feed Paper Continuous Printhead TRACTOR ASSY FRONT From Front Insertion EJECT Figure 2 14 Paper Path for Front Entrance Pull Tractor Feed 2 9 ...

Page 48: ...ssion gear Q COMBINATION GEAR 1 Q COMBINATION GEAR 2 RATCHET RD The ink ribbon within the cartridge case is an endless ribbon that is held against the ribbon advance roller by the pressure of the ribbon grip roller The ribbon advance roller linked to the ribbon drive gear winds the ink ribbon The ribbon brake spring attached to the exit slot of the cartridge case prevents slack in the ribbon and k...

Page 49: ...he power supply circuitry in block diagram form AC power feeds into the printer from the external power source A filter circuit removes the noise The AC voltage then undergoes full wave rectification and is smoothed to produce the direct current supply voltage This voltage is fed through a switching circuit and secondary smoothing circuit to produce the stepped down 35 VDC supply A 35 V line volta...

Page 50: ...rcuit cuts the supply if the voltage reaches or exceeds 36 VDC It stops the switching circuit operation which stops the output of the 35 VDC line The voltage drop protection circuit protects the printer from such damage as might occur from short circuiting in the secondary circuitry of the 35 VDC line If a voltage drop is detected it stops the switching circuit operation which stops the output of ...

Page 51: ...t r o l I Panel 1 1 1 1 J C062 MAIN Board 1 1 1 1 8 8 I t I I 1 1 1 I I I 1 1 GA Parallel l F E05A50 4D d I Option 1 l F I J 1 1 1 1 1 1 1 1 1 1 1 1 I t 1 1 1 1 V r e f Circuit EEPROM 4C I 1 PROM 5 12K 5 E I 7 I X 136 column only 1 t I 1 I I 1 1 1 1 1 1 9 I 1 I 1 1 PSRAM PSRAM MROM MROM 256K 64K 8M 1 6E 1 E 3E E 1 I t 1 1 L d 1 1 1 1 1 1 1 CPU TMP90C041 lC 1 I STK 6022B 2A 1 1 1 1 1 I I I I 1 I I ...

Page 52: ...inthead Figure 2 18 Data Flow Table 2 5 Functions of the Main IC and Circuits outputs the head drive IC or Circuit Location Functions TMP90C041 Ic Receives data from the host computer and loads the data to the input buffer in RAM under interrupt processing control Expands the input data held in the buffer to create image data Loads this image data to the image buffer in RAM Transfers the image dat...

Page 53: ... reset circuit in block diagram form The reset circuit issues the RESET signal Each part of the control circuits is initialized when this RESETsignai is received The conditions when the RESET signal is output are described below When turning on the power supply Immediately after the power has been turned on STK 6022B 2A outputs the VCCON pulse E05A50 4D receives this pulse and then outputs the DIS...

Page 54: ...Other signals such as the CRHOME signal pass through the STK 6022B unit before reaching the CPU Terminals P50 to P55 on the CPU are used for the A D convertor The Vref circuit generates the A D convertor reference voltage Vref CPU 1 c STK 6022B 2A P55 CRHOUT CRHOME CRHOME P54 PE20UT PE2 PE2 P52 B PE1OUT PE 1 E PE1 P34 GAPOUT GAP GAP P31 LEVOUT LEVER LEVER P51 A V P P VPP 35 V Line I 50 TEMp2 4 7 4...

Page 55: ...of the MOTOR CR The amount of current is set by the CPU via the E05A50 1 0 port Signals are sent to SELR 1 to SELR4 on the STK 6022B The STK 6022B sets the coil current to correspond to the MOTOR CR speed Ports P60 to P63 on the CPU are used exclusively as control ports CPU lC P60 P61 P62 P63 STK 6022B 2A CRAIN CRA CRBIN CRB CRCIN CRC m CRD Po SELR1 Data Bus P1 SELR2 P2 SELR3 Gp P5 SELR4 E05A50 4D...

Page 56: ...PFD are turned on and off within the STK 6022B according to this phase data sent from the CPU When the MOTOR PF is running the voltage supplying the coil of the MOTOR PF is 35 V When the MOTOR PF is not running and is in hold status the supply voltage to the coil is 5 V Switching between these two supply voltages occurs at the PFCOM terminal of the STK 6022B when PFENB is turned on or off STK 6022...

Page 57: ... to HD24 that relate to voltage levels through the length of the pulses These signals are output to the head for each of the sections of print data that were created by subdividing the data three times before sending By sampling the 35 V line voltage and determining the length of the head drive signal it is possible to maintain the energy supplied to the head at a constant level If the voltage of ...

Page 58: ...24 that relate to voltage levels through the length of the pulses These signals are output to the head for each of the sections of print data that were created by subdividing the data three times before sending By sampling the 35 V line voltage and determining the length of the head drive signal it is possible to maintain the energy supplied to the head at a constant level If the voltage of the 35...

Page 59: ...emoving the BOARD ASSY PANEL C062 PNL Board 3 8 3 2 4 Removing the PRINTER MECHANISM 3 9 3 2 5 Disassembling the PRINTER MECHANISM 3 10 3 2 5 1 3 2 5 2 3 2 5 3 3 2 5 4 3 2 5 5 3 2 5 6 3 2 5 7 3 2 5 8 3 2 5 9 3 2 5 10 3 2 5 11 3 2 5 12 3 2 5 13 Removing the Motor CR 3 10 Removing the Motor PF 3 11 Removing the CABLE HEAD FRONT REAR 3 11 Removing the Carriage 3 12 Removing the PLATEN 3 13 Removing n...

Page 60: ...IN BOARD 3 7 BOARD ASSY MAIN 3 7 BOARD ASSY POWER SUPPLY 3 8 BOARD ASSY PANEL 3 9 PRINTER MECHANISM 3 9 MOTOR CR 3 10 MOTOR PA 3 11 Removing the CABLE HEAD FRONT REAR 3 11 Removing the Carriage Unit 3 12 Removing the PLATEN 3 13 LEVER RELEASE Insertion Positioning 3 14 Disassembling the FRAME MAIN RIGHT 3 14 Direction for Inserting the PLAIN WASHER 3 15 Removing the PAPER GUIDE 3 15 Removing the P...

Page 61: ... the recommended tools for maintenance work Use only the recommended lubricants and adhesives see Chapter 6 Adjust the printer only in the manner described in this manual 3 1 2 TOOIS Tables 3 1 and 3 2 list the various recommended tools that are needed when disassembling assembling or adjusting the printer Use only tools that meet these specifications Table 3 1 List of Recommended Tools Tool Part ...

Page 62: ...the paper advance motor running at the l Checked Not necessary correct temperature and not overheating Paper path l Is the type of paper in the printer feeding Checked Not necessary smoothly l Is the tractor feeding the paper correctly Checked Not necessary Is the paper path clear of all obstructions l Checked Not necessary Is the platen free of damage l Checked Not necessary Ribbon Is the ribbon ...

Page 63: ...cessed Bind head Cone point S tight screw CBB C Cross recessed Bind head Cone point B tight screw CB Cross recessed Bind head screw CBS 0 Cross recessed Bind head S tight with screw with Outside toothed lock washer Table 3 5 Types of Screws and Abbreviations Heed Top ross recessed heal lotted head e Side Bind 0 0 with Notch russ lb Body ormai tight 3 E tight i i mo apping Washer assembled 1 lain w...

Page 64: ...paper and the ink ribbon Disassembly 1 Removing 2 Removing 3 Removing 4 Removing includes the following five procedures the the the the printhead case electrical circuits printer mechanism 5 Disassembling the printer mechanism Diagrams in the appendix show how the components fit together Refer to them as necessary I Remove printer power cord and interface cable Remove paper Section Page Descriptio...

Page 65: ...n 80 column printer The difference between the LQ 570 and the LQ 1070 is only in carriage width Figure 3 2 Removing the FRAME ASSY SHEET GUIDE and the COVER ASSY EJECT 3 Release the two levers that hold the printhead to the carriage Lift out the printhead 4 Remove the two FFCS CABLE HEAD FRONT REAR from the printhead CAB1 Figure 3 3 Removing the Printhead 3 5 ...

Page 66: ...2 2 2 Removing the HOUSING ASSY UPPER 1 2 3 4 5 Remove the COVER ASSY PRINTER FRONT the COVER ASSY EJECT the TRACTOR ASSY and the KNOB Remove the two CBS C M3 X 10 screws that hold the optional interface card cover Remove the cover CB8 C M4XX crew2 CBS C M3X 10 Screws COVER CONNECTOR UPPER for Optional Interface Card This picture is 80 column Figure 3 5 Removing the COVER CONNECTOR UPPER for the O...

Page 67: ...LD PLATE MAIN BOARD CB8 C M4 X 14 Screw SHIELD PLATE RIGHT CBB M4 X 10 Screv CB M3 X 6 Screw HOLDING PLATE FFC SHIELD PLATE MAIN BOARD BOARD ASSY MAIN CBB CfiM3 X 10 Screws C062 MAIN Board Figure 3 6 Removing the SHIELD PLATE MAIN BOARD Remove the CBB M4X 10 screw that holds the SHIELD PLATE RIGHT to the BOARD ASSY MAIN Remove the CBB C M4 X 14 screw that holds it to the HOUSING ASSY LOWER Remove ...

Page 68: ...N 1 from the BOARD ASSY POWER SUPPLY 4 Remove the four CBB C M3X 10 screws and the CB M3X8 screws that hold the BOARD ASSY POWER SUPPLY to the HOUSING ASSY LOWER Remove the BOARD ASSY POWER SUPPLY BOARD ASSY POWER SUPPLY C062 PSB PSE Board GROUNDING WIRE 136 column only 80 column 1 36 column Figure 3 8 Removing the BOARD ASSY POWER SUPPLY I 3 2 3 3 Removing the BOARD ASSY PANEL C062 PNL Board 1 Re...

Page 69: ...pin and CN12 red 2 pin 4 Remove the CBB C M4 X 10 screw that holds the SHIELD PLATE RIGHT to the BOARD ASSY MAIN see Figure 3 6 Remove the CBB C M4X 14 screws that hold it to the HOUSING ASSY LOWER Remove the SHIELD PLATE RIGHT 5 Remove the three CBB C M4X 14 screws that hold the PRINTER MECHANISM to the HOUSING ASSY LOWER Remove the PRINTER MECHANISM II d l SHIELD PLATE RIGHT CBB C M4 X 14 Screws...

Page 70: ...R frame from the HOUSING ASSY LOWER 5 Remove the two CBS 0 M3X6 screws that hold the MOTOR CR to the FRAME ASSY CR MOTOR Remove the MOTOR CR MOTOR CR EXTENSION SPRING 778 FRAME MAIN BASE FRAME ASSY CR ifl a MOTOR 6 Screws Figure 3 11 Removing the MOTOR CR Points to Note for Assembly and Adjustment See Section 3 2 5 13 for details on arranging and positioning the motor cable After removing the MOTO...

Page 71: ...3 Removing the FFC CABLE HEAD FRONT REAR 1 2 3 4 5 Remove the printhead see Section 3 2 1 Remove the PRINTER MECHANISM from the HOUSING ASSY LOWER see Section 3 2 4 Remove the FFC from the clips that hold it along the rear side of the PRINTER MECHANISM Make sure that the FFC is free Remove the FFC from clip on the HOLDING PLATE FFC at the rear of the PRINTER MECHANISM Remove the four clips that ho...

Page 72: ... This bushing holds the SHAFT CR GUIDE to the FRAME MAIN RIGHT Remove the bushing Remove the carriage unit together with the SHAFT CR GUIDE by pulling the SHAFT CR GUIDE a little to the right BUSH PARALLEL ADJUST d UIDE Figure 3 14 Removing the Carriage Unit Point to Note for Assembly and Adjustment After removing or rotating the adjusting bushing you must adjust the platen gap see Section 4 1 2 3...

Page 73: ...ve the LEVER RELEASE from the platen shaft Rotate the bushing by using the tweezers that holds the platen to the FRAME MAIN LEFT Remove this BUSHING 8 with the GROUND SPRING Rotate the BUSHING 8 by using the tweezers that holds the platen to the FRAME MAIN RIGHT Remove the PLATEN by lifting it up toward the right CBP C M3 X 10 Screws sH Q JD pR LEVER RELEASE PLATEN EXTENSION SPRING 43 Figure 3 15 ...

Page 74: ...IGHT from the FRAME MAIN BASE Remove the following items from the FRAME MAIN RIGHT in the specified order MOTOR PF see Section 3 2 5 2 CAM CLUTCH TRACTOR COMBINATION GEAR 8 5 30 SPUR WASHER COMPRESSION SPRING 200 and SPUR GEAR 16 CBS C P M3X 10 Screws w FRAME MAIN RIGHT G 200 PF COMBINATION GEAR 8 5 30 CAM CLUTCH TRACTOR Figure 3 17 Disassembling the FRAME MAIN RIGHT GEAR PLAIN 1 Point to Note for...

Page 75: ...BASE 5 While holding open the clips that secure the PAPER GUIDE to the FRAME MAIN BASE slide the PAPER GUIDE to the left Remove the PAPER GUIDE 6 7 8 Open the clips that IDE AIN BASE EXTENSION SPRING 43 This picture is 80 column Figure 3 19 Removing the PAPER GUIDE hold the SPUR GEAR 18 to the ROLLER ASSY PF DRIVE Remove the SPUR GEAR 18 from the ROLLER ASSY PF DRIVE Remove the ROLLER ASSY PF DRIV...

Page 76: ... ASSY RELEASE to the PAPER GUIDE remove the DETECTOR ASSY RELEASE LEVER ASSY PF This picture is 80 column 136 column printer has four Paper advance Rollers and four sDrinas COMPRESSION SPRING 1300 5Ab il A SHAFT RELEASE I Figure 3 21 Removing the LEVER ASSY PF Point to Note for Assembly I Insert the SHAFT RELEASE in the PAPER GUIDE in the way shown in the diagram below I I Figure 3 22 How to Inser...

Page 77: ...SE DETECTOR ASSY HP Figure 3 23 Removing the DETECTOR ASSY HP 3 2 5 9 Removing the DETECTOR ASSY PE REAR 1 Remove the PRINTER MECHANISM from the HOUSING ASSY LOWER see Section 3 2 4 2 Remove the two CBP C M3 X 10 screws that hold the COVER PLATEN LOWER to the frame Remove the COVER PLATEN LOWER 3 Remove the clips that hold the DETECTOR ASSY PE REAR in the PAPER GUIDE Remove the DETECTOR ASSY PE RE...

Page 78: ...the DETECTOR ASSY PE FRONT DETECTOR ASSY Figure 3 25 Removing the DETECTOR ASSY PE FRONT 3 2 5 11 Removing the DETECTOR ASSY PLATEN 1 2 Remove the PRINTER MECHANISM from the HOUSING ASSY LOWER see Section 3 2 4 Remove the clips that hold DETECTOR ASSY PLATEN to the FRAME MAIN LEFT Remove the DETECTOR ASSY PLATEN n 7 DETECTORASSY L e f t rame PLATEN 1 I I Itll II UU J Figure 3 26 Removing the DETEC...

Page 79: ...e SHAFT TRACTOR and the SHAFT TRACTOR GUIDE Remove RETAINING RING from the SHAFT TRACTOR Remove the TRACTOR ASSEMBLY RIGHT the PAPER SUPPORT unit and the TRACTOR ASSEMBLY LEFT from the SHAFT TRACTOR and SHAFT TRACTOR GUIDE 2 EMBLy RIGHT SHAFT TRACTOR GUIDE RETAINING RING aJ SHAFT TRACTOR K F R A M E T R A C T O R RIGHT SPUR GEAR 17 Figure 3 27 Disassembling the TRACTOR ASSY 3 19 I ...

Page 80: ...e cables are arranged for the PRINTER MECHANISM When assembling the printer make sure that the cables are laid out as shown in this figure PRINTER MECHANISM Bottom n 1 A Mlw t 11 B lnluiaJl n n II This is an 80 column printer Figure 3 28 Arranging the Cables 3 20 ...

Page 81: ... POSITION ADJUSTMENT 4 4 4 2 1 Overview of Bidirectional Print Position Adjustment 4 4 4 2 2 Bidirectional Print Position Adjustment Procedure 4 4 4 3 CIRCUIT ADJUSTMENT 4 6 4 3 1 Adjustment Process 4 6 LIST OF FIGURES Figure 4 1 MOTOR CR Backlash Adjustment 4 2 Figure 4 2 Removing the RIBBON MASK 4 2 Figure 4 3 The Adjusting Bushing 4 3 Figure 4 4 Platen Gap 4 3 ...

Page 82: ...ccuracy of character alignment during printing suffers 1 2 3 smoothly with noisy and the Remove the MOTOR CR along with the FRAME ASSY CR MOTOR from the PRINTER MECHANISM see Section 3 2 5 1 Loosen the two CBS 0 M3X 6 screws that hold the MOTOR CR to the FRAME ASSY CR MOTOR Check the alignment of the MOTOR CR pinion gear with the BELT PULLEY cog Move the MOTOR CR until you judge that there is a ga...

Page 83: ...tion 3 2 1 Use tweezers to remove the RIBBON MASK from the carriage RIBBON MASK riage Figure 4 2 Removing the RIBBON MASK Remount the printhead on the carriage Set the paper thickness LEVER G ADJUST to position O the second step position Move the LEVER RELEASE back to the friction setting Move the carriage until the edge of the printhead is at the 5th column print position Use the box driver 7 mm ...

Page 84: ...kness gauge of 0 44 mm thickness but too narrow for one of 0 47 mm thickness Move the printhead back again so that the edge of the printhead is at the 5th column print position Check the platen gap again with the thickness gauge It should still be large enough for a thickness gauge of 0 44 mm thickness but too narrow for one of 0 47 mm thickness If this is not the case go back to step 8 Center the...

Page 85: ...cteristics of each I PRINTER MECHANISM For this reason there is no standard skew correction value that can be applied to each printer The unique skew correction value for each printer has to be written to EEPROM on the I BOARD ASSY MAIN C062 MAIN BOARD I Whenever the PRINTER MECHANISM or the BOARD ASSY MAIN C062 MAIN BOARD itself is changed during sevicing the bidirectional print position must be ...

Page 86: ...to the right Press the ALT LF FF and LOAD EJECT buttons at the same time The printer enters LQ mode and the printer prints the reference value and the 1 characters for 4 lines Are the characters aligned vertically NO GO TO STEP 6 YES GO TO STEP 7 Referring to the odd numbered lines 1st and 3rd adjust the even numbered lines 2nd and 4th If the even numbered lines are shifted to the right Press the ...

Page 87: ...adjusting this variable resistance R14 RI 5 R13 C8 and VR 1 If the circuitry is not correctly balanced in this way the CPU A D converter fails to function normally and printer operation is affected 4 3 1 Adjustment Process I Attach a digital multimeter to the check terminal TP2 Vref voltage on the BOARD ASSY MAIN C062 MAIN BOARD Turn on printer power and turn variable resistor VR1 until a reading ...

Page 88: ...R MECHANISM 5 17 Figure 5 1 Figure 5 2 Table 5 1 Table 5 2 Table 5 3 Table 5 4 Table 5 5 LIST OF FIGURES Troubleshooting Procedure 5 1 Printhead Resistance 5 8 LIST OF TABLES Motor and Printhead Coil Resistance 5 1 Error Codes 5 1 Symptoms and Reference Pages 5 2 Repair of a Problem in the BOARD ASSY MAIN C062 MAIN BOARD 5 14 Repair of the PRINTER MECHANISM 5 17 ...

Page 89: ...mation Table 5 1 Motor and Printhead Coil Resistance I Part Specifications I MOTOR CR Coil resistance 19 5 ohms 7 at 25 degrees C 77 degrees F MOTOR PF Coil resistance 79 0 5 ohms at 25 degrees C 77 degrees F Printhead Coil resistance 45 5 3 2 ohms at 25 degrees C 77 degrees F Table 3 2 Error Codes Error Display Error Cause Buzzer beeps 3 times for Paper out error Printer is out of paper 0 1 secon...

Page 90: ...nter then fails to enter the READY mode Printing is faulty during self No printing at all 5 5 test but carriage operation is Faulty printing some of the dots are not printed normal Paper feeding is abnormal No paper is fed 5 9 Regular paper feed but with variations in the separa tions between lines Control panel operation is When the LF switch is activated no paper is fed 5 12 abnormal Printing of...

Page 91: ... T A R T I Use correct AC input voltage Replace the fuSe and disconnect don the main No is turned ON again Measure the output voltage from the Power Supply board No 1 1 Replace the PRINTER MECHANISM 1 Replace the BOARD ASSY PoWER SUPPLY I 1 I I END 5 3 ...

Page 92: ...N9 CN 10 CN4 CN5 CN6 and CN7 connecting the BOARD ASSY MAIN and the PRINTER MECHANISM inserted Secure connectors I Yes I No 4 END No Yes Refer to section 5 5 Repair of the PRINTER MECHANISM No the fault corrected Replace the BOARD ASSY Yes MAIN END 5 4 ...

Page 93: ... the head LEVER G ADJUST to the 2nd position and perform and CN7 connecting the BOARD ASSY MAIN a n y ao mlsslngf and the PRINTER MECHANISM Perform bidirectional printing adjustment o A No the fault corrected Replace the printhead Yes the fault corrected Replace the BOARD AS SY MAIN Q END ...

Page 94: ...Check printhead resistance Yes Replace pluggable chips Yes Replace printhead Replace printhead and logic PCB Yes No No Replace logic PCB ...

Page 95: ...Q D I Check printhead resistance again I T I Replace printhead Replace printhead cable k 1 I 1 Perform final t e s t ...

Page 96: ...2 2 4 Q g g TEMP1 4 8 16 cOM H 21 tIi3 5 Terminal Assignment o 0 o 5 o 7 o 9 o 11 Oqls o 15 o 17 o 19 o 21 o 423 240 Wire Assignment Coil Resistance 45 5 3 2 Q at 25 C Between each dot wire and common Figure 5 2 Printhead Resistance 5 8 ...

Page 97: ...rectly i 6 A platen knob rotate manually with power Refer to seCtiOn 5 5 T Yes Repair of the PRINTER MECHANISM I Replace the BOARD ASSY MAIN No 4 No Replace the BOARD ASSY MAIN Refer to seCt On 5 5 Replace the BOARD ASSY Repair of the PRINTER MAIN and the MOTOR PF MECHANISM I I v 5 9 ...

Page 98: ...e defective m oto r NOTE NOTE n B Check motor resistance Perform final t e s t No Replace motor and 1 0 cable END NOTE Replace motor I Yes NOTE No No v 3 1 Yes I Perform final test I NOTE Perform bidirectional print alignment adjustment 5 1o ...

Page 99: ...t gears for damage or debris 3 Clean or replace Check left and right tractor No Yes assembly for proper phasing Adjust phasing or replace w sprocket assembly No Yes Inspect paper path Reform final test END 5 11 ...

Page 100: ...s Abnormal ASSY MAIN connected Reinsert connector CN3 correctly k No Is the fault corrected Yes I T7 END v No Replace the BOARD ASSY PANEL No Replace the BOARD ASSY MAIN T7 Replace the BOARD ASSY MAIN Replace the BOARD ASSY PANEL 5 12 ...

Page 101: ...Data Sent by the Host Computer is Faulty NOTE It is assumed here that the host computer is operating normally Perform self test printing No Refer to other troubleshooting items Replace the BOARD ASSY MAIN I L I I 5 13 ...

Page 102: ...f a Problem in the BOARD ASSY MAIN Problem Symptom Cause Checkpoint Solution The printer does not op erate at all The CPU does not operate The reset cir cuit is not operational Selection of control ROM is abnormal Check the voltage waveforms for the 5V line IC2A pin 52 and for the THLD signal IC2A pin 73 when power is on Check the voltage waveforms for the THLD signal IC2A pin 73 and for the RESET...

Page 103: ...ause Either ROM or RAM is defective The CPU is defective ICI C is defective IC2A is defective IC2A is defective Checkpoint heck the oscillator signal at either pin or pin 34 of the CPU 33 Check the MOTOR CR phase signal at pins 9 10 11 and 12 of ICIC At IC2A check the input signal for pin 90 and the output waveform for pin 100 I Solution Replace IC5E or IC6E If a signal is detected re place ICI C ...

Page 104: ...A is defective Measure the voltage at Vref pin 1 of IC 1 C The normal voltage is 4 741 V At IC4D check the input signal at pin 101 and the output signal at pin 46 Adjust VR 1 Replace IC4D Replace IC2A a per is not The paper IC2A is Replace IC2A ed normally does not defective feed or the feed pitch is abnormal rinting of da Data corrup IC4D or IC5D Replace IC4D a from the tion occurs is defective o...

Page 105: ...eck for broken Replace the BELT not operate nor rotates but the is defective or worn pulley PULLEY really at power on carriage does not The TIMING BELT Check that the TIM Reinsert the TIM after the carriage move has been manually is defective ING BELT is cor ING BELT sentered prior to rectly inserted into the bottom of the power on carriage Check for a broken Replace the timing timing belt belt Th...

Page 106: ...ADJUST to the Refer to Section adjusted second position 4 1 2 Platen Gap and check the gap Adjustment between the tip of the printhead and the PLATEN The appropriate value is 0 46 mm Paper feeding is Printing is per Foreign substances Perform a visual Remove any for bnormal formed but the pa are lodged in the check of the paper eign substance per is not fed or is paper path path not fed uniformly ...

Page 107: ...ge the carriage moves check whether the in one direction planetary lever i e it fails to feed turns in reverse when the carriage and engages the moves in the other gear direction aper becomes Ink stains appear The RIBBON MASK Check whether the Reinstall the RIB tained on areas where is not correctly RIBBON MASK is in BON MASK there is pinting positioned the correct position The platen gap is Set t...

Page 108: ... APPLICATION 6 1 LIST OF FIGURES Figure 6 1 Correct Adhesive Application 6 2 Figure 6 2 LQ 570 Lubrication Points 6 3 Figure 6 3 LQ 107O Lubrication Points 6 4 LIST OF TABLES Table 6 1 Table 6 2 Table 6 3 Lubricants and Adhesive 6 1 Lubrication Points 6 2 Adhesive Application Point 6 2 i ...

Page 109: ...6 2 lists each point together with its recommended lubricant The three recommended lubricants are EPSON O 2 G 20 and G 26 all of which of this printer Tabie 6 1 provides that the surface to be lubricated is parts have been tested extensively and found to comply with the needs details about these lubricants Before applying a lubricant be sure clean Do not apply too much lubricant as this may damage...

Page 110: ...6 9 Ribbon feed gear shafts G 26 10 Gear 1 1 5 mm shaft G 26 11 Portion of paper guide that contacts gear 18 mm G 26 12 Portion of paper guide that contacts sub paper guide G 26 13 Portion of release shaft that contacts paper guide G 26 14 Portion of paper tension roller shaft that contacts paper tension frame G 26 15 Portion of tractor shaft that contacts tractor frame left G 26 16 Tractor clutch...

Page 111: ...REV A Figure 6 2 LQ 570 Lubrication Points 6 3 ...

Page 112: ...REV B 6 4 ...

Page 113: ...am A 6 BOARD ASSY POWER SOPPLY C062 PSB BOARD Circuit Diagram Annotated A 7 BOARD ASS POWER SOPPLY C062 PSB BOARD Circuit Diagram A 8 BOARD ASSY POWER SUPLY C062 PSE BOARD Circuit Diagram Annotated A 9 BOARD ASSY POWER SUPPLY C062 PSE BOARD Circuit Diagram A 1 O BOARD ASSY PANEL C062 PNL BOARD Circuit Diagram A 1 1 BOARD ASSY PANEL C062 MAIN BOARD Component Layout A 12 BOARD ASSY C062 PSB BOARD Co...

Page 114: ... CN3 BOARD ASSY MAIN C062 CN4 BOARD ASSY MAIN C062 CN5 BOARD ASSY MAIN C062 CN6 BOARD ASSY MAIN C062 CN7 BOARD ASSY MAIN C062 CN8 BOARD ASSY MAIN C062 CN9 BOARD ASSY MAIN C062 MAIN A 3 MAIN A 3 MAIN A 3 MAIN A 3 MAIN A 3 MAIN A 4 MAIN A 4 MAIN A 4 CN1O BOARD ASSY MAIN C062 MAIN A 4 CN11 BOARD ASSY MAIN C062 MAIN A 4 CN12 BOARD ASSY MAIN C062 MAIN A 4 CN13 BOARD ASSY MAIN C062 MAIN A 4 Part No Refe...

Page 115: ...d sizes of the connectors 0 1 I I I I BOARD ASSY PANEL Model 5E10 5E60 PRINTER MECHANISM 06 D NL GAP LEVER CRHOME PE 2 PE I CR MOTOR PF MOTOR HEAD HEAD IY _ b BOARD ASSY MAIN C062 MAIN BOARD k CN 1 CN2 m f f 4 Optional I nterf ace Card 1 t I I I I i BOARD ASSY POWER SUPPLY C062 PSB PSE BOARD I t AC IN Figure A 1 Cable Connections A 1 ...

Page 116: ... Printhead 15 CN8 DETECTOR ASSY HP HP sensor 2 CN9 DETECTOR ASSY PE REAR 2 CN 10 DETECTOR ASSY PE PRONT 2 CN 11 DETECTOR ASSY PLATEN 2 CN 12 DETECTOR ASSY RELEASE 2 CN 13 DC power input BOARD ASSY POWER SUPPLY C062 PSB PSE board 11 BOARD ASSY POWER SUP CN 1 AC power input 2 PLY C062 PSBIPSE BOARD CN2 DC power output BOARD ASSY MAIN C062 MAIN board 11 BOARD ASSY PANEL CN 1 BOARD ASSY MAIN C062 MAIN...

Page 117: ...062 MAIN No 1 0 Signal Name Function 1 I PAUSE Pause switch 2 READY Fixed GND 3 0 TXS Transmit signal LED 4 0 LDLED LED data latch 5 0 CKS Shift clock 6 0 LDSW Load switch data 7 I RXS Receive data switch 8 5 5 VDC 9 GND Signal ground 10 SHLD Shield ground 11 I POWER I Power switch 12 POWER2 Fixed GND No 1 2 3 4 5 1 0 o 0 0 0 0 Signal Name CRA CRB CRC CRD CRCOM Function MOTOR CR phase A MOTOR CR p...

Page 118: ...SSY HP 2 GND Signal ground I Table A 9 CN9 BOARD ASSY MAIN C062 MAIN No 1 0 Signal Name Function 1 0 Psc Power switch signal 2 5 5 VDC 3 5 5 VDC 4 GND Signal ground 5 GND Signal ground 6 GND Signal ground 7 GND Signal ground 8 GND Signal ground 9 3 5 35 VDC 10 3 5 35 VDC 11 3 5 35 VDC No 1 0 Signal Name Function 1 I PE2 DETCTOR ASSY PE REAR 2 GND Signal ground Table A 1O CN1O BOARD ASSY MAIN C062 ...

Page 119: ... z v I II I o t b 1 I JL I w iWr I I 1 j Diagram I POWER Filter C062 PSB Rectlf Ler Figure A 4 BOARD ASSY A 7 ...

Page 120: ...REV B T I I I 3 L II t 7 T T I 1 I N w f Figure A 5 BOARD ASSY POWER I C062 PSB Board Circuit Diagram f c A 8 ...

Page 121: ... J i m Rectifier 1 Filter Figure A 6 BOARD ASSY POWER SUPPLY C062 PSE BOARD Circuit Diagram Annotated 1 A 9 ...

Page 122: ...REV B f I I 1 t x 1 L 4 t z Figure A 7 BOARD ASSY POWER SUPPLY C062 PSE Board Circuit Diagram A 1 O ...

Page 123: ...REV B 1 i ij i I I i Uo 1 1 p l k m z u Figure A 8 BOARD ASSY PANEL C062 PNL BOARD Circuit Diagram A 1 1 ...

Page 124: ...RCUIT BOARD COMPONENT LAYOUT I J t I I 1 1 1 9 1 I I I 1 1 1 1 1 1 I I I 1 1 I 1 1 1 1 I I 1 1 1 I 1 1 1 t t 1 I i 1 1 I a OZJ 45 EIN3 Jy 1 5 p f g Figure A 9 BOARD ASSY MAIN C062 MAIN Board Component Layout A 1 2 ...

Page 125: ...REV B C3 11 C9 I 1 Figure A 10 BOARD ASSY POWER SUPPLY C062 PSB BOARD Component Layout A 1 3 ...

Page 126: ...REV B c L I ASSY 2002850 00 1 Figure A 1 1 BOARD ASSY POWER SUPPLY C062 PSE Board Component Layout A 1 4 ...

Page 127: ...REV B Zluo Zr Vlr alr Figure A 1 2 BOARD ASSY PANEL C062 PNL BOARD Component Layout A 1 5 ...

Page 128: ...Figure A 1 3 LQ 570 Exploded Diagram A 1 6 ...

Page 129: ...REV B A 1 9 ...

Page 130: ...R 124 HEXAGON NUT M4 536 DETECTOR PE FRONT 125 C B B C SCREW M3X 10 537 DETECTOR PLATEN 126 C B S TITE C SCREW M3X 10 538 PLATEN 127 C B B P SCREW M3X 12 539 BUSHING 8 128 C B B P SCREW M4 X 25 540 SPUR GEAR 34 129 C B A LAMITITE M3X 6 541 PLAIN WASHER 8X0 5 X 15 130 C B SCREW M3X 6 542 LEAF SPRING 8 2X0 15X 15 131 SOUND ABSORBER 543 RETAINING RING TYPE C 544 TRACTOR ASSY oo BOARD ASSY MAIN 545 TR...

Page 131: ...E 5 SHAFT CR GUIDE LEVER G ADJUST PULLEY DRIVEN BELT PULLEY FLANGE SHAFT DRIVEN PULLEY PLAIN WASHER 3 2 XO 5 X 7 CABLE HEAD FRONT CABLE HEAD REAR GROUNDING PLATE CR RIBBON MASK LEVER RELEASE SHAFT RELEASE SUPPORT TIMING BELT OIL PAD BUSH PARALLEL ADJUST HOLDER HEAD CABLE EXTENSION SPRING 778 EXTENSION SPRING 32 COVER PLATEN LOWER COVER RD C B S TITE C P2 SCREW M3 X 10 C B P TITE C SCREW M3x 10 Ref...

Page 132: ...REV A A 5 CASE OUTLINE DRAWING u I J 1 b 1 368 m m I 151 m c q Figure A 1 7 LQ 570 Case Outline Drawing A 22 ...

Page 133: ... I C 71 I Ila u 4 l t mm 151 m Figure A 1 8 LQ 107O Case Outline Drawing A 23 ...

Page 134: ...borough Road No 1 Raffles Place 26 00 Frenchs Forest NSW 2086 Australia Oub Centre Singapore 0104 Phone 02 452 0666 Phone 5330477 Fax 02 975 1409 Fax 5338119 EPSON HONG KONG LTD EPSON ELECTRONICS TRADING LTD 25 F Harbour Centre TAIWAN BRANCH 25 Harbour Road Wanchai 10F No 287 Nanking E Road Sec 3 Hong Kong Taipei Taiwan R O C Phone 5 8314600 Phone 02 717 7360 Fax 5 725792 Fax 02 7129164 EPSON ITAL...

Page 135: ...EPSON Printed in Japan 91 09 5 G ...

Search results

Summary of Contents for LQ-1070+

Reviews:

Related manuals for LQ-1070+

Brands by name

Popular brands

Epson LQ-1070+, Service Manual

Search results

Summary of Contents for LQ-1070+

Reviews:

Related manuals for LQ-1070+

Brands by name

Popular brands