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Epson LG1-1070, Service Manual

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LIST OF FIGURES

Figure 1-1.

Figure 1-2.

Figure 1-3.

Figure 1-4.

Figure 1-5.

Figure 1-6.

Figure 1-7.

Figure 1-8.

Figure 1-9.

Figure l-10.

Figure 1-11.

Figure 1-12.

Figure 1-13.

Figure 1-14.

Figure 1-15.

Figure 1-16.

Table 1-1.

Table 1-2.

Table 1-3.

Table l-4.

Table 1-5.

Table 1-6.

Table l-7.

Table 1-8.

Table 1-9.

Table 1-10.

Table 1-11.

Table 1-12.

Table 1-13.

Table 1-14.

Table 1-15.

Table l-16.

Exterior View of the 

 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Pin Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-3

Printable Area for Cut Sheets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

 

Printable Area for Continuous Sheets . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-6

Character Matrix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-13

Data Transmission Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

 

Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

 

Self-Test Printout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-20

Hexadecimal Dump Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-20

Lever Positions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-24

 070 Component Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-26

 MAIN Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   

 PNL Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

 

 PSB/PSE Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-27

 O/5E60 Printer Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . .1-28

Housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-28

LIST OF TABLES

Interface Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

 

Optional Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-2

Specifications for Cut Sheets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4

Specifications for Cut Sheets

(Carbonless Duplicating Paper) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5

Specifications for Continuous Sheets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5

Envelopes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-5

Label Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-5

Printing (Text Mode) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-10

Printing (Bit Image Mode) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

 

Character Matrix and Character Size. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Connector Pin Assignments and Signal Functions . . . . . . . 1-14

Settings for DIP Switch 1 

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-18

Settings for DIP Switch 2 

 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  

International Character Set Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Page Length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

 

Lever Positions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  ......... 1-24

 

Summary of Contents for LG1-1070

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 ...

Page 136: ...he same as the LQ 1070 All the information contained herein is equally applicable to both printers With the exception of a few parts all parts for the ActionPrinter 5000 5500 are identical to those for the LQ 570 1070 Refer to the parts price list PL LQ57AP5 for a list of the unique parts for the Epson ActionPrinter 5000 5500 ...

Page 137: ...LQ 570 1070 ActionPrinter 5000 5500 24 PIN DOT MATRIX PRINTERS TM LQ57AP5 ...

Page 138: ...L Q 5 7 0 1 0 7 0 SERVICE MANUAL EPSON Printed on Recycled Paper ...

Page 139: ...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 140: ... 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 1 REPAIRS ON EPSON PRODUCT SHOULD BE PERFORMED ONLY BY AN EPSON CERTIFIED REPAIR TECHNICIAN 2 MAKE CERTAIN THAT THE SOURCE VOLTAGE IS THE SAME AS THE RATED VOLTAGE LISTED ON THE SERIAL NUMBER RATING...

Page 141: ......

Page 142: ... 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 printer Describes the theory of printer operation 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 maintenan...

Page 143: ...e 20 1991 1st issue B July 26 1991 Added information for the LQ 1070 l i l ii l l l 8 l 10 l l 1 l 24 l 26 l 28 2 i 2 ii 2 l 2 1 1 2 13 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 l 5 5 5 9 5 1 1 5 19 6 i 6 1 6 4 A l A ii A l A 15 A 17 A 19 A 22 A 23 v ...

Page 144: ...REV A TABLE OF CONTENTS CHAPTER 1 CHAPTER 2 CHAPTER 3 CHAPTER 4 CHAPTER 5 CHAPTER 6 APPENDIX GENERAL DESCRIPTION OPERATION PRINCIPLES DISASSEMBLY AND ASSEMBLY ADJUSTMENTS TROUBLESHOOTING MAINTENANCE vi ...

Page 145: ...Dump Function 1 20 1 6 3 Paper out Detection and Forms Override Function 1 21 1 6 4 Error Conditions 1 21 1 6 5 Buzzer Operation 1 21 1 6 6 Printer Initialization 1 21 1 6 7 Default Values 1 22 1 6 8 Sheet Loading and Sheet Ejection 1 22 1 6 9 Tear off Function 1 23 1 6 10 LEVER G ADJUST 1 24 1 6 11 Printer Protection for Heavy Duty Printing 1 25 MAIN COMPONENTS 1 26 1 7 1 C062 MAIN Board Main Con...

Page 146: ... PSE Board 1 27 Model 5E10 5E60 Printer Mechanism 1 28 Housing 1 28 LIST OF TABLES Table 1 1 Interface Options 1 1 Table 1 2 Optional Units 1 2 Table 1 3 Specifications for Cut Sheets 1 4 Table 1 4 Specifications for Cut Sheets Carbonless Duplicating Paper 1 5 Table 1 5 Specifications for Continuous Sheets 1 5 Table 1 6 Envelopes 1 5 Table 1 7 Label Specifications 1 5 Table 1 8 Printing Text Mode ...

Page 147: ...nuous paper Three ways to insert continuous paper front bottom rear path Auto backout and auto loading rear insertion Use of continuous paper without removing CSF Attachment of standard tractor unit in either of two positions push pull 0 Easy handling of cut sheets with the optional cut sheet feeder Two ways to insert cut sheets front top Auto loading The LQ 570 1070 are equipped with the standard...

Page 148: ...bin cut sheet feeder 136 column c806401 High capacity cut sheet feeder 136 column 1 c868181 1 Tractor unit 80 column 1 C800221 1 Tractor unit 136 column I 7753 Fabric ribbon cartridge 80 column 7754 Fabric ribbon cartridge 136 column 7768 Film ribbon cartridge 80 column 7770 1 Film ribbon cartridae 136 column LQ 1070 Figure 1 1 Exterior View of the LQ 570 1070 1 2 ...

Page 149: ...feed Front or rear side Tractor feed Front bottom or rear side Friction without CSF 77 6 msec l 6 inch feed 2 2 inches per second ips continuous Friction with CSF 77 6 msec l 6 inch feed 2 2 ips continuous Tractor 77 6 msec l g inch feed 2 2 ips continuous NOTE The points below provide precautions for handling paper REV B 1 Friction feed release lever in FRICTION POSITION 0 Paper must be loaded fr...

Page 150: ...he horizontal position of the pull tractor and push tractor sprockets 0 Paper for multiple copies must be spot pasted beyond the perforation between the tractor holes 0 Paper for copies must be a carbonless multi part paper 0 Do not perform reverse feeds greater than 4 l 5 inch 0 Do not perform a reverse feed after the paper end has been detected 4 Pull tractor feed release lever in PULL POSITION ...

Page 151: ...n to 0 0 197 in Differences in thickness within the printing area must be less than 0 25 mm 0 0098 in 12 lb to 24 lb 40 g m2 to 9 1 g m2 Bond paper standard paper airmail Not available NOTES 0 Printing on envelopes is available only at normal temperatures and only using top insertion 0 Keep the longer side of the envelope horizontal during insertion 0 Place the left edge of a No 6 envelope at the ...

Page 152: ...hen the width of paper is less than 392 mm 15 4 in 29 mm 1 14 in top insertion 31 mm 1 22 in front insertion or more when the width of paper is 392 mm 15 4 in to 420 mm 16 4 in 0 Paper feed accuracy cannot be assured within 22 mm 0 87 in from the bottom edge of paper top insertion Paper feed accuracy cannot be assured within 40 2 mm 1 58 in from the bottom edge of paper front insertion Paper feed ...

Page 153: ...fe of printhead Safety approvals Dimensions of ribbon 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 stroke...

Page 154: ...s Temperature Humidity 5 to 35 degrees C 41 to 95 degrees F operating 30 to 60 degrees C 22 to 140 degrees F in shipment container 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 pounds approx Dimensio...

Page 155: ...nal EPSON Sans Serif 10 12 15 proportional E P S O N C o u r i e r 1 0 12 15 EPSON Prestige IO 12 EPSON Script IO 12 EPSON Script C proportional OCR B 10 EPSON Orator 10 EPSON Orator S 10 EPSON Draft 10 12 15 Scalable fonts EPSON Roman 8 pt to 32 pt EPSON Sans Serif 8 pt to 32 pt Printing modes Selection and mixture of the following modes are allowed excluding 15 cpi condensed mode 0 Print quality...

Page 156: ...ed The printer switches back into normal mode to print emphasized condensed or download characters and bit images Printing speed Printing columns Character matrix Character size See tables l 8 and l 9 See Table 1 8 See Table I IO See Table I 10 Table 1 8 Printing Text Mode Print Pitch Condensed Printable Columns Character Pitch Printing Speed cps cpi Draft LQ 1 HSD 10 0 80 136 10 210 70 225 1 137 ...

Page 157: ... dual density I 120 I 960 1632 I 2 1 o 8 Quadruple density 240 1920 3264 10 5 8 CRT graphics 80 640 1088 10 5 8 CRT graphics II 90 720 1224 14 0 24 Single density 60 480 8 16 21 0 24 Dual density I 120 I 960 1632 I 10 5 24 1 CRT graphics II I 90 I 720 224 I 14 0 24 1 Triple density I 180 I 1440 2448 I 7 0 24 Hex density I 360 I 2880 4896 I 7 0 136 column dpi dots per inch ips inches per second 1 1...

Page 158: ...ximum character This value is dependent on paper ribbon etc 0 Unit ESC sp which also can be sent as unit followed by the character string CHR h20 indicates the minimum length to be added to the right of the character specified with the ESC sp control code 0 indicates that the character matrix is reshaped by printer firmware Character width becomes half of the noncondensed character width 1 12 ...

Page 159: ...0 21 22 23 24 Subscript character 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 L L E E F F r r S S P P A A C C E E 4 4 Ascender area Ascender area I I Descender area R I G H T S P A C E P 4 29 dots Typical LQ excluding 15 pitch 15 dots for 15 pitch and condensed LQ Character width CW 36 dots 10 CPI 360 DPI 3 0 dots 12 CPI 360 DPI 24 dots 15 CPI 360 DPI 21 dots condensed 10 CPI 36...

Page 160: ...parallel interface Table l l 1 Connector 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 VI be more than 0 5 s Input data is latched 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 0 5 DATA 4 23 IN...

Page 161: ...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 levels Both the rise and fall times of all signals must be less than 0 2 s 5 The AUTOFEED XT signal can be set to LOW by DIP switch 2 4 6 The SELECT IN signal can be set to LOW by jumper 3 7 Printing tests including those of the interfac...

Page 162: ... 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 163: ...2 PAUSE orange Lit when the printer is in PAUSE mode no printing no paper feeding and not accepting data 3 TEAR OFF orange Lit when the sheet is advanced to the tear off position 4 DATA orange Lit when the printer has received data from the host 5 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 164: ... INIT signal Table l 12 Settings for DIP Switch 1 SWl No Description ON OFF 1 2 International character set and PC selection See Table l l 4 3 4 Character table selection Graphic Italic 5 Graphic print direction Unidir Bidir 6 High speed draft Invalid Valid 7 Input buffer Invalid Valid 8 l inch skip continuous paper ON OFF Factory Setting ON ON ON OFF OFF OFF OFF OFF Table 1 13 Settings for DIP Sw...

Page 165: ...860 863 865 437 437 437 I When SW l 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 0 country setting becomes U S Table l l 5 Page Length 2 l 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 LOW 1 19 ...

Page 166: ...f 0 l o t f o f t 01 i rjn rJt f oft otf ofl on OF r High s p e e d d r a f t SWl 6 V a l i d of f Invalid on Receive buffer SWl 7 V a l i d o f f 111vtiljd 0 I 1 1 i n c h s k i p SWl 8 Invalid o f f 1 0 I L swz 1 2 2 o f f o f f Figure 1 B 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 ...

Page 167: ...etected at printer mechanism initialization 0 Home position is detected during printing 0 The PAUSE button is pressed and the printer enters PAUSE condition 0 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 b...

Page 168: ...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 l 6 inch Cleared Every 8 characters relative Last font selected from the panel Kept software initialization Cleared hardware initialization IO cpi Cleared e...

Page 169: ...valid for the next loaded position 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 170: ... 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 ADJUST must be set to the proper position for t...

Page 171: ... 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 172: ... MAIN Board Printer Mechanism M 5E60 Printer Mechanism M 5E 10 LQ 570 LQ 1070 Figure l 1 1 LQ 570 1 070 Component Layout 1 7 1 C062 MAIN Board Main Control Circuit Board The CO62 MAIN Board for the LQ 570 consists of a TMP90C04 1 N g bit CPU an E05A50 gate array a PROM 5 12K a PSRAM 256K a mask ROM character generator 2M an EEPROM and IC STK 6022B In addition to this the board for the LQ 1070 also...

Page 173: ...tches Figure 1 13 CO62 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 CO62 PSB board is 12OV input type and the CO62 PSE board is 220 24OV input type Figure 1 14 CO62 PSB PSE Board 1 27 ...

Page 174: ...s printer mechanism allows three ways of paper insertion This picture shows an 80 column Printer T h e M 5ElO a n d M 5E60 differ in width only I Figure l 15 Model 5El0 5E60 Printer Mechanism 1 7 5 Housing I The LQ 570 1070 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 board a...

Page 175: ...its 2 16 2 3 4 MOTOR CR Drive Circuit 2 17 2 3 5 MOTOR PF Drive Circuit 2 18 2 3 6 Printhead Drive Circuit 2 19 2 3 7 Parallel Interface Circuit 2 20 2 3 7 EEPROM Control Circuit 2 20 LIST OF FIGURES Figure 2 1 Figure 2 2 Figure 2 3 Figure 2 4 Figure 2 5 Figure 2 6 Figure 2 7 Figure 2 8 Figure 2 9 Figure 2 10 Figure 2 11 How the Printhead Works 2 1 Carriage Movement 2 2 Paper Thickness Gap LEVER G...

Page 176: ...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 Table 2 2 Table 2 3 Table 2 4 Table 2 5 Table 2 ...

Page 177: ...uses the plate to approach the coil rod and the associated dot wire is rapidly ejected to impact on the platen 3 The dot wire presses the ink ribbon up against the pa per as it hits the platen and in this way prints a dot on the paper 4 As soon as the current through the coil is switched off the force induced in the coil rod stops The plate then returns to its original position its position before...

Page 178: ...ovement 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 the fourth p...

Page 179: ... Method Friction Feed Push Tractor Pull Tractor Push pull Tractor Feed Rear Front Entrance Entrance No OK OK No No OK OK No Bottom Entrance No No OK No Top Entrance 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 advance ...

Page 180: ...paper feed pinion gear when turning in the direction of the black arrow results in pushing the paper through the mechanism I 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 ROLLER ASSY PAPER EJECT I 5 SPUR...

Page 181: ...2 6 illustrates pull tractor operation tractor when paper is inserted through the bottom path Paper Continuous SPUR GEAR 16 per Feed Motor Pinon Gear COMBINATION 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 front of and one behind the paper entrance to advance the paper They ac...

Page 182: ...R RELEASE 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 I There are two paper out detectors the front paper out detector is in front of the PRINTER MECHANISM and the rear paper out detector ...

Page 183: ...tractor or the push pull tractor The rear paper out detector senses when the paper has run out Paper Continuous ROLLER ASSY PAPER EJECT PAPER GUIDE Printhead TRACTOR ASSY DETECTOR ASSY Paper Feed Roller Figure 2 10 Paper Path for Rear Entrance Push Tractor Feed Paper Feed Roller Figure 2 l 1 Paper Path for Rear Entrance Push Pull Tractor Feed 2 7 ...

Page 184: ...rough the bottom entrance the pull tractor advances the paper The front paper out detector senses when the paper runs out Paper Continuous TRACTOR ASSY DETECTOR ASSY PE FRONT Paper Feed Roller From Bottom Insertion Figure 2 12 Paper Path for Bottom Entrance Pull Tractor Feed 2 8 ...

Page 185: ...tractor The front paper out detector senses when the paper runs out DETECTOR ASSY PE FRONT ROLLER ASSY PAPER PF Drive Roller From Front Insertion Figure 2 13 Paper Path for Front Entrance Friction Feed Paper Continuous TRACTOR ASSY FRONT From Front Insertion From Front Insertion DETECTOR ASSY PE EJECT Figure 2 14 Paper Path for Front Entrance Pull Tractor Feed 2 9 ...

Page 186: ... 0 Ribbon transmission gear 0 COMBINATION GEAR 1 0 COMBINATION GEAR 2 0 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 ...

Page 187: ...s the 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 vo...

Page 188: ...tage drop protection circuit The 35 V voltage overload protection circuit 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...

Page 189: ...M on a single chip Figure 2 l 7 shows the control circuits in block diagram form CO62 PNL Board r n I Control I 1 Panel I 1 I___ A CO62 MAIN Board r _ ____________ ___ I t I 1 I I I I I I I I I t I I J I I I Vref ICI Circuit I I _ ____________________________________ 1 r I I I PRINTHEADMOTOR CR MOTOR PF DETECTOR ASSY DETECTOR ASSY DETECTOR ASSY DETECTOR ASSY DETECTOR ASSY I HP PE FRONT PE REAR PLA...

Page 190: ...igure 2 18 Data Flow Table 2 5 Functions of the Main IC and Circuits IC or Circuit Location Functions TMP90C04 1 1c 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 data to the printhead drive circui...

Page 191: ...rcuit in block diagram form The reset circuit issues the RESET signal Each part of the control circuits is initialized when this RESETsignal 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 DISC pulse T...

Page 192: ... 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 IC P 5 5 P54 P 5 2 P34 P31 STK 6022B 2A CRHOUT CRHOME PE20UT f PE2 PElOUT PEl GAPOUT GAP L E V O U T LEVER CRHOME PE2 PEl GAP LEVER P51 A V P P VPP 35 V Line P50 TEMP2 ...

Page 193: ...eed of the MOTOR CR The amount of current is set by the CPU via the E05A50 I O port Signals are sent to SELRl to SELR4 on the STK 6022B The STK 6022B sets the coil current to correspond to the MOTOR CR speed I Ports P60 to P63 on the CPU are used exclusively as control ports for the stepping motor CPU 1C STK 6022B 2A P60 GRAIN CRA P61 CRBIN CRB P 6 2 CRCIN CRC P 6 3 CRDIN CRD PO SELR 1 Data Bus Pl...

Page 194: ...are turned on and off within the STK 6022B according to this phase data sent from the CPU I 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 CPU 1C P70...

Page 195: ... 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 V...

Page 196: ...U resets the BUSY signal so that the printer is ready to receive more data from the host computer Parallel I F DO 7 D I N O 7 D A T A O 7 DO 7 STB i i STROBE e __ r I I I I B U S Y BUSY P82 E05A50 4D CPU 1C Figure 2 26 Parallel Interface Circuit 2 3 7 EEPROM Control Circuit Figure 2 27 shows the EEPROM control circuit in block diagram form The EEPROM is used to hold such information as the top of ...

Page 197: ...moving 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 Removing the Motor CR 3 10 3 2 5 2 Removing the Motor PF 3 11 3 2 5 3 Removing the CABLE HEAD FRONT REAR 3 11 3 2 5 4 Removing the Carriage 3 12 3 2 5 5 Removing the PLATEN 3 13 3 2 5 6 Removing and Disassembling the FRAME MAIN RIGHT 3 14 3 2 5 7 Removing a...

Page 198: ...moving the PLATEN 3 13 Figure 3 16 LEVER RELEASE Insertion Positioning 3 14 Figure 3 17 Disassembling the FRAME MAIN RIGHT 3 14 Figure 3 18 Direction for Inserting the PLAIN WASHER 3 15 Figure 3 19 Removing the PAPER GUIDE 3 15 Figure 3 20 Removing the PAPER GUIDE ASSY SUPPORT 3 16 Figure 3 21 Removing the LEVER ASSY PF 3 16 Figure 3 22 How to Insert the SHAFT RELEASE 3 16 Figure 3 23 Removing the...

Page 199: ...commended tools for maintenance work CAUTION I Use only the recommended lubricants and adhesives see Chapter 6 Adjust the printer only in the manner described in this manual 3 1 2 Tools Tables 3 l 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 Pa...

Page 200: ...dvance motor running at the 0 Checked 0 Not necessary correct temperature and not overheating Paper path Is the type of paper in the printer feeding 0 Checked 17 Not necessary smoothly Ribbon mask Is the tractor feeding the paper correctly i Checked 0 Not necessary Is the paper path clear of all obstructions 0 Checked 0 Not necessary Is the platen free of damage El Checked i Not necessary Is the r...

Page 201: ...nt S tight screw CBB C Cross recessed Bind head Cone point B tight screw CB Cross recessed Bind head screw CBS O Cross recessed Bind head S tight with screw with Outside toothed lock washer Table 3 5 Types of Screws and Abbreviations Head Body Washer assembled Top Side Cross recessed head 1 nd 1 Pjormal 1 _Plain washer 0 w O Hb P 2 S tight Slotted head with Notch 0 2 Outside toothed i k washer 2 P...

Page 202: ...ny part of the printer note the warnings in Section 3 1 Before disassembling any part of the printer remove the paper and the ink ribbon Disassembly includes the following five procedures 1 Removing the printhead 2 Removing the case 3 Removing the electrical circuits 4 Removing the printer mechanism 5 Disassembling the printer mechanism Diagrams in the appendix show how the components fit together...

Page 203: ...he LQ 570 an 80column printer The difference I between the LQ 570 and LQ 1070 is in carriage width only Figure 3 2 Removing the FRAME ASSY SHEET GUIDE and the COVER ASSY EJECT I 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 ...

Page 204: ...3 2 2 2 Removing the HOUSING ASSY UPPER 1 Remove the COVER ASSY PRINTER FRONT the COVER ASSY EJECT the TRACTOR ASSY and the KNOB 2 Remove the two CBS C M3X 10 screws that hold the optional interface card cover Remove the cover CBB C M4 X 25 Screws 10 Screws ER CONNECTOR UPPER for Optional Interface Card This illustration shows the LQ 570 an 80 column printer I Figure 3 5 Removing the COVER CONNECT...

Page 205: ...TE MAIN BOARD CBS C M4 X 14 Screw SHIELD PLATE RIGHT CBB M4X 10 Screw CB M3 X 6 Screw HOLDING PLATE FFC SHIELD PLATE MAIN BOARD BOARD ASSY MAIN CBB CfiM3 X 10 Screws CO62 MAIN Board Figure 3 6 Removing the SHIELD PLATE MAIN BOARD 5 Remove the CBB M4 X 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 the ...

Page 206: ...four CBS C M3 X 10 screws and the CB M3 X 8 screws that hold the BOARD ASSY POWER SUPPLY to the HOUSING ASSY LOWER Remove the BOARD ASSY POWER SUPPLY BOARD ASSY POWER SUPPLY CO62 PSB PSE Board CN13 CB M3X8 S c r e w GROUNDING WIRE 136 column only CNl CBB C M3 X 10 Screws 80 column 136 column Figure 3 6 Removing the BOARD ASSY POWER SUPPLY 3 2 3 3 Removing the BOARD ASSY PANEL C062 PNL Board 1 Remo...

Page 207: ...n and CN 12 red 2 pin 4 Remove the CBS C M4 X 10 screw that holds the SHIELD PLATE RIGHT to the BOARD ASSY MAIN see Figure 3 6 Remove the CBS C M4X 14 screws that hold it to the HOUSING ASSY LOWER Remove the SHIELD PLATE RIGHT 5 Remove the three CBS C M4X 14 screws that hold the PRINTER MECHANISM to the HOUSING ASSY LOWER Remove the PRINTER MECHANISM mCBB C M4 X 14 Screws CBS C M4 X 14 Screws This...

Page 208: ...G ASSY LOWER 5 Remove the two CBS O M3 X 6 screws that hold the MOTOR CR to the FRAME ASSY CR MOTOR Remove the MOTOR CR h M O T O R C R EXTENSION SPRING 778 FRAME ASSY CR MOTOR CBS O M3 X 6 Screws FRAME MAIN BASE 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 MOTOR CR from...

Page 209: ...5 3 Removing the FFC CABLE HEAD FRONT REAR 1 Remove the printhead see Section 3 2 1 2 Remove the PRINTER MECHANISM from the HOUSING ASSY LOWER see Section 3 2 4 3 Remove the FFC from the clips that hold it along the rear side of the PRINTER MECHANISM Make sure that the FFC is free 4 Remove the FFC from clip on the HOLDING PLATE FFC at the rear of the PRINTER MECHANISM 5 Remove the four clips that ...

Page 210: ...ng This bushing holds the SHAFT CR GUIDE to the FRAME MAIN RIGHT Remove the bushing 4 Remove the carriage unit together with the SHAFT CR GUIDE by pulling the SHAFT CR GUIDE a little to the right Adjusting Bushing 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 I 3 12 ...

Page 211: ... RELEASE from the platen shaft 6 Using tweezers rotate the bushing 8 mm that holds the platen to the frame main left Remove this bushing along with the ground spring 7 Using tweezers rotate the bushing 8 mm that holds the platen to the frame main right Remove the platen by lifting it up toward the right CBP C M3 K 10 Screws W PLATEN A BUSHING 8 GROUNb SPRING LEVER RELEASE EXTENSION SPRING 43 Figur...

Page 212: ...move 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 GEAR PLAIN WASHER COMPRESSION SPRING 200 and SPUR GEAR 16 CWW M3 X 10 Screw FRAME MAIN RIGHT SPUR GEAR 16 COMPRESSION SPRING 200 PLAIN WASHER SPUR GEAR 40 MOTOR PF COMBINATION GEAR 8 5 CAM CLUTCH TRACTOR w I Figure 3 17 Disassembling the FRAME MAIN ...

Page 213: ...hile 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 EXTENSION SPRING 43 This illustration shows an 80column printer Figure 3 19 Removing the PAPER GUIDE the LQ 570 6 Open the clips that hold the SPUR GEAR 18 to the ROLLER ASSY PF DRIVE Remove the SPUR GEAR 18 from the ROLLER ASSY PF DRIVE 7 Remove the ROLLER ASSY P...

Page 214: ...SSY RELEASE to the PAPER GUIDE remove the DETECTOR ASSY RELEASE LEVER ASSY PF This illustration shows the LQ 570 an 80column printer The 136 column printer has four paper advance rollers and four springs COMPRESSION SPRING 1300 I Figure 3 21 Removing the LEVER ASSY PF Point to Note for Assembly Insert the SHAFT RELEASE in the PAPER GUIDE in the way shown in the diagram below PAPER GUIDE Right Figu...

Page 215: ...E MAIN BASE 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 REAR DETEC...

Page 216: ...OR ASSY PE FRONT DETECTOR ASSY PE FRONT FRAME MAIN BASE I Figure 3 25 Removing the DETECTOR ASSY PE FRONT 3 2 5 11 Removing the DETECTOR ASSY PLATEN 1 Remove the PRINTER MECHANISM from the HOUSING ASSY LOWER see Section 3 2 4 2 Remove the clips that hold DETECTOR ASSY PLATEN to the FRAME MAIN LEFT Remove the DETECTOR ASSY PLATEN DETECTOR ASSY PLATEN r Left Frame w I J J Figure 3 26 Removing the DE...

Page 217: ...m the SHAFT TRACTOR and the SHAFT TRACTOR GUIDE 4 Remove RETAINING RING from the SHAFT TRACTOR 5 Remove the TRACTOR ASSEMBLY RIGHT the PAPER SUPPORT unit and the TRACTOR ASSEMBLY LEFT froin the SHAFT TRACTOR and SHAFT TRACTOR GUIDE TRACTOR ASSEMBLY LEFT ER SUPPORT TRACTOR ASSEMBLY RIGHT ACTOR GUIDE TAINING RING I SPUR GEAR 17 Figure 3 27 Disassembling the TRACTOR ASSY 3 19 ...

Page 218: ...he 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 This illustration shows the LQ 570 an 80 column printer Figure 3 28 Arranging the Cables 3 20 l ...

Page 219: ...OSITION 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 4 i ...

Page 220: ...er operation becomes noisy and the accuracy of character alignment during printing suffers 1 Remove the MOTOR CR along with the FRAME ASSY CR MOTOR from the PRINTER MECHANISM see Section 3 2 5 1 2 Loosen the two CBS O M3 X 6 screws that hold the MOTOR CR to the FRAME ASSY CR MOTOR 3 Check the alignment of the MOTOR CR pinion gear with the BELT PULLEY cog Move the MOTOR CR until you judge that ther...

Page 221: ...to remove the RIBBON MASK from the carriage RIBBON MASK Carriage Figure 4 2 Removing the RIBBON MASK 4 Remount the printhead on the carriage I 5 Set the paper thickness LEVER G ADJUST to position 0 the second step position 6 Move the LEVER RELEASE back to the friction setting 7 Move the carriage until the edge of the printhead is at the 5th column print position I 8 Use the box driver 7 mm to rota...

Page 222: ...e of 0 44 mm thickness but too narrow for one of 0 47 mm thickness 13 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 14 Center the car...

Page 223: ...istics of each 1 PRINTER MECHANISM For this reason there is no standard skew correction value that can be applied I to each printer The unique skew correction value for each printer has to be written to EEPROM on the BOARD ASSY MAIN CO62 MAIN BOARD 1 Whenever the PRINTER MECHANISM or the BOARD ASSY MAIN CO62 MAIN BOARD itself is changed during servicing the bidirectional print position must be rea...

Page 224: ...ight 4 Press the ALT LF FF and LOAD EJECT buttons at the same time 5 The printer enters LQ mode and the printer prints the reference value and the I characters for 4 lines Are the characters aligned vertically NO GO TO STEP 6 YES GO TO STEP 7 6 Referring to the odd numbered lines 1st and 3rd adjust the even numbered lines 2nd and 4th l If the even numbered lines are shifted to the right Press the ...

Page 225: ... adjusting this variable resistance R14 R15 R13 C8 and VRl 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 CO62 MAIN BOARD Turn on printer power and turn variable resistor VRl until a reading o...

Page 226: ...ROUBLESHOOTING Figure 5 1 Troubleshooting Procedure 5 1 Figure 5 2 Printhead Resistance 5 8 LIST OF TABLES Table 5 1 Motor and Printhead Coil Resistance 5 1 Table 5 2 Error Codes 5 1 Table 5 3 Symptoms and Reference Pages 5 2 Table 5 4 Repair of a Problem in the BOARD ASSY MAIN Table 5 5 C062 MAIN BOARD 5 14 Repair of the PRINTER MECHANISM 5 17 LIST OF FIGURES 5 i ...

Page 227: ...stance I Part I Specifications I I MOTOR CR I Co11 resistance 19 5 ohms 7 at 25 degrees C 77 degrees F I MOTOR PF Printhead Coil resistance 79 0 5 ohms at 25 degrees C 77 degrees F Coil resistance 45 5 3 2 ohms at 25 degrees C 77 degrees F Table 5 2 Error Codes Error Display Buzzer beeps 3 times for 0 1 second with 0 l sec ond intervals Error Cause Paper out error Printer is out of paper DETECTOR ...

Page 228: ... does not move Control panel indicator lamp does not light 5 3 Carriage moves away from home position at power on 5 4 The carriage returns to the home position correctly but the printer then fails to enter the READY mode No printing at all Faulty printing some of the dots are not printed 5 5 No paper is fed Regular paper feed but with variations in the separa tions between lines 5 9 When the LF sw...

Page 229: ...Fails to Operate when Power is On fuse Fl on the Power Supply board from the Power Supply board I Yes output voltage No 1 Yes fault corrected Replace the PRINTER MECHANISM I Replace the BOARD ASSY POWER SUPPLY END 5 3 ...

Page 230: ...CN7 connecting the BOARD ASSY connecting the BOARD ASSY MAIN MAIN and the and the PRINTER PRINTER Secure connectors Secure connectors Yes fault corrected END Refer to section 5 5 I Repair of the PRINTER MECHANISM Replace the BOARD ASSY MAIN the fault corrected END v END v 5 4 ...

Page 231: ...nd position and perform s e l f t e s t and the PRINTER MECHANISM and the PRINTER MECHANISM inserted securely inserted securely Perform bidirectional Perform bidirectional printing adjustment printing adjustment Reinsert them correctly Reinsert them correctly the fault corrected Replace the printhead ASSY MAIN 5 5 ...

Page 232: ...REV A Check printhead resistance Yes Replace pluggable chips Yes Replace printhead Replace printhead and logic PCB No 5 6 ...

Page 233: ...REV A No Replace printhead and PH cable Yes 5 Perform final t e s t 5 7 ...

Page 234: ... it TEhPi t4 8 116 C O M 21 113 r5 Terminal Assignment 0 l 0 113 0 5 0 7 0 II9 0 I1 0 113 0 it15 0 17 0 19 0 21 0 23 240 Wire Assignment Coil Resistance 45 5 k3 2 L1 at 25 C Between each dot wire and commdn Figure 5 2 Printhead Resistance 5 8 ...

Page 235: ...aper loaded correctly Refer to section 5 5 Repair of the PRINTER MECHANISM Replace the BOARD ASSY MAIN APER P F eiYstIIce fault corrected Replace the Bo R1_ y Refer to section 5 5 Repair of the PRINTER Replace the BOARD ASSY MECHANISM MAIN and the MOTOR PF 5 9 ...

Page 236: ...s Replace logic PCB NOTE Replace defective Replace motor and main logic board No Chec motor resistance NOTE Perform final t e s t No _ Replace motor and I O cable NOTE Yes Perform final test NOTE Perform bidirectional print alignment adjustment 5 10 ...

Page 237: ...REV B Clean or replace Check lefl and right tractor assemblies for proper phasing No Adjust phasin rw l rr Ime Inspect paper p a t h 4 Perform final test xi 5 11 ...

Page 238: ...REV B 5 Control Panel Operation is Abnormal No fault corrected Yes self test executed No 1 Replace the BOARD ASSY MAIN I fault corrected Yes Replace the BOARD ASSY PANEL c 5 12 ...

Page 239: ...puter is Faulty NOTE It is assumed here that the host computer is operating normally START Perform self test printing Is self test printing normal Refer to other troubleshooting items Replace the connection cable from the host computer 1 END 5 13 ...

Page 240: ...f a Problem in the BOARD ASSY MAIN Problem Symptom Cause Checkpoint Solution The printer The CPU does The reset cir Check the voltage waveforms for the 5V Replace IC2A does not op not operate cuit is not line IC2A pin 52 and for the THLD signal erate at all operational IC2A pin 73 when power is on Check the voltage waveforms for the Replace IC4D THLD signal IC2A pin 73 and for the RESET signal IC4...

Page 241: ...r ROM or RAM is defective The CPU is defective IClC is defective IC2A is defective IC2A i s defective Checkpoint Check the oscillator signal at either pin 33 or pin 34 of the CPU Check the MOTOR CR phase signal at pins 9 10 11 and 12 of ICIC I I I I I I I I At IC2A check the input signal for pin 90 and the output waveform for pin 100 Solution Replace IC5E Dr IC6E If a signal is detected re place I...

Page 242: ...35V line IC4D is At IC4D check the input signal at pin 101 Replace IC4D defective and the output signal at pin 46 I I I II I 14 L L 2v 2v 0 2ms A particular IC2A is Replace IC2A dot is not be defective ing printed Paper is not The paper IC2A is Replace IC2A fed normally does not defective feed or the feed pitch is abnormal Printing of da Data corrup IC4D or IC5D Replace IC4D ta from the tion occur...

Page 243: ...eck for broken Replace the BELT not operate nor rotates but the is defective or worn pulley PULLEY mally at power on carriage does not after the carriage The TIMING BELT Check that the TIM Reinsert the TIM move is defective ING BELT is cor ING BELT has been manually centered prior to rectly inserted into power on the bottom of the carriage Check for a broken Replace the timing timing belt belt The...

Page 244: ...JUST 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 abnormal Printing is per Foreign substances Perform a visual Remove any for 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 T...

Page 245: ...e 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 Paper becomes stained Ink stains appear on areas where there is printing The RIBBON MASK Check whether the Reinstall the RIB is not correctly RIBBON MASK is in BON MASK positioned the correct position The platen gap is Set the...

Page 246: ...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 1070 Lubrication Points 6 4 LIST OF TABLES Table 6 1 Lubricants and Adhesive 6 1 Table 6 2 Lubrication Points 6 2 Table 6 3 Adhesive Application Point 6 2 6 i ...

Page 247: ... 6 2 Table 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 have been tested extensively and found to comply with the needs of this printer Table 6 l provides details about these lubricants Before applying a lubricant be sure that the surface to be lubricated is clean Do not apply too much lubricant as this may d...

Page 248: ... 11 Portion of paper guide that contacts gear 18 mm 12 Portion of paper guide that contacts sub paper guide 13 Portion of release shaft that contacts paper guide 14 Portion of paper tension roller shaft that contacts paper tension frame 15 Portion of tractor shaft that contacts tractor frame left 16 Tractor clutch cam NOTE Lubrication must be applied during the reassembly process Lubricant G 26 G ...

Page 249: ...REV A Figure 6 2 LQ 570 Lubrication Points 6 3 ...

Page 250: ...REV B Figure 6 3 LQ 1 070 Lubrication Points 6 4 ...

Page 251: ...BOARD Circuit Diagram A 8 BOARD ASSY POWER SUPPLY C062 PSE BOARD Circuit Diagram Annotated A 9 BOARD ASSY POWER SUPPLY C062 PSE BOARD Circuit Diagram A 10 BOARD ASSY PANEL C062 PNL BOARD Circuit Diagram A 11 BOARD ASSY PANEL C062 MAIN BOARD Component Layout A 12 Figure A 10 BOARD ASSY C062 PSB BOARD Component Layout A 13 Figure A 11 BOARD ASSY POWER C062 PSE BOARD Component Layout A 14 Figure A 12...

Page 252: ...e A 6 CN6 BOARD ASSY MAIN C062 MAIN A 3 Table A 7 CN7 BOARD ASSY MAIN C062 MAIN A 4 Table A 8 CN8 B o A R D A S S Y M A I N C062 MAIN A 4 Table A 9 CN9 BOARD ASSY MAIN C062 MAIN A 4 Table A 10 CN10 BOARD ASSY MAIN C062 MAIN A 4 Table A 11 CN11 BOARD ASSY MAIN C062 MAIN A 4 Table A 12 CN12 BOARD ASSY MAIN C062 MAIN A 4 Table A 13 CN13 BOARD ASSY MAIN C062 MAIN A 4 LIST OF TABLES Table A 14 Part No ...

Page 253: ... ASSY MAIN CO62 MAIN BOARD m BOARD ASSY PANEL Model 5E10 5E60 PRINTER MECHANISM BCOOAG D NL GAP LEVER CRHOME PE 2 PE 1 CR MOTOR PF MOTOR HEAD HEAD A A A A A A A A A t 1 1 1 1 1 1 CN3 CNII CN12 CN8 CN9 CNIO CN4 CN5 Optional Interface Card 1 I Parallel I F i Specific I F 1 HOST COMPUTER BOARD ASSY POWER SUPPLY CO62 PSB PSE BOARD t AC IN Figure A l Cable Connections A 1 ...

Page 254: ...17 CN7 Printhead 15 CN8 DETECTOR ASSY HP HP sensor 2 CN9 DETECTOR ASSY PE REAR 2 CNlO DETECTOR ASSY PE PRONT 2 CNll DETECTOR ASSY PLATEN 2 CN12 DETECTOR ASSY RELEASE 2 CN13 DCpowerinputBOARD ASSY POWER SUPPLy CO62 PSB PSE board 11 BOARDASSY POWERSUP CNl AC power input 2 PLY C062 PSB PSE BOARD CN2 DC power output BOARD ASSY MAIN CO62 MAIN board 1 1 BOARD ASSY PANEL CN 1 BOARD ASSY MAIN CO62 MAIN bo...

Page 255: ... o I O 1 I 2 3 0 4 0 5 0 6 0 7 I 8 9 10 11 I 12 Signal Name PAUSE READY TXS LDLED CKS LDSW RXS 5 GND SHLD POWER 1 POWER2 Function Pause switch Fixed GND Transmit signal LED LED data latch Shift clock Load switch data Receive data switch 5 VDC Signal ground Shield ground Power switch Fixed GND No I O Signal Name Function 1 0 CRA MOTOR CR phase A 2 0 CRB MOTOR CR phase B 3 0 CRC MOTOR CR phase C 4 0...

Page 256: ...N6 BOARD ASSY MAIN CO62 MAIN No I O Signal Name Function I1 I CRHOME DETECTOR ASSY HP 2 GND Signal ground I Table A 9 CN9 BOARD ASSY MAIN CO62 MAIN No I O Signal Name Function I1 I PE2 DETECTOR ASSY PE REAR 2 GND Signal ground I Table A 10 CNlO BOARD ASSY MAIN CO62 MAIN No I O Signal Name Function I1 I PEl DETECTORASSY PE FRONT 2 GND Signal ground I Table A l 1 CNl 1 BOARD ASSY MAIN CO62 MAIN lql ...

Page 257: ... 5 3 R L ...

Page 258: ...REV B Figure A 3 BOARD ASSY MAIN C062 MAIN BOARD Circuit Diagram A 6 C 0 6 2 M A I N B o a r d ...

Page 259: ...CN2 T PT 07 D5 FMP IZS c2 c3 22ooP 22OOP T _ FG 2 1 2 ELF1 90290b I Cl 0 22 1 4E ll RI 300 b 1 F 2 5A 125 r RI3 RI2 4 7K 2 K 1 C062 2002849 ...

Page 260: ...CN2 I 1 i630 c 5 f 0 lu 50 I 052 9 AGOli TlR R5 c IOK 2W 22wP IH 4 c si C5 Z2WP C 270 2OOY I 80hrn 25C t L I I 39 w D do w 2K TLP52 2GB 3K I C O 6 2 P S B B o a r d 2 0 0 2 8 4 9 loo 12O AC ...

Page 261: ... I L N CNl L I r I 1 TT 1 C062 PSE Board 2002850 ...

Page 262: ...Pb CNl C062 PSE Board 2002850 ...

Page 263: ...CN1 RXSO PIUSE d I CO62 PNL Board 1 Excluding Japan ...

Page 264: ...CO62 MAIN m _ ASSY 2002847 00 I I26 c x L z CI 12 I RI III G c lh m r 1 21 CNll21 rb n6 KlA 1 CNB CN9 CNIOnLU MROM BM 256K 1 a z 6 3 8 rk C 6 1112131 I IWB I 1 I I 1 RIOEC 19V I ...

Page 265: ...REV B c61 I L J C O 6 2 PSB TM u a m cnrCMK 54X1 A S S Y 2 0 0 2 8 4 9 0 0 Figure A 10 BOARD ASSY POWER SUPPLY C062 PSB BOARD Component Layout I A 13 ...

Page 266: ...REV B c2 C3 I II L2 a D8I 5 I t K 54XT v A S S Y 2 0 0 2 8 5 0 0 0 Figure A 11 BOARD ASSY POWER SUPPLY C062 PSE Board Component Layout A 14 ...

Page 267: ... C O 6 2 P N L QW CM YXT 2 DIP 5 1 s A S S Y 2 0 0 2 8 5 2 0 0 J3 DI I ...

Page 268: ... 2 ...

Page 269: ...REV B Figure A 14 LQ 1070 Exploded Diagram A 17 ...

Page 270: ...REV B x Figure A 15 Model 5E10 Exploded Diagram A 18 ...

Page 271: ...REV B Figure A 16 Model 5E60 Exploded Diagram A 19 ...

Page 272: ...ame 504 Tractor clutch cam 505 Combination gear 8 5 mm 30 mm 506 Spur gear 40 mm Ref No Description 507 Compression spring 200 gm 508 Plain washer M5 x 16 509 Spur gear 40 mm 510 Lefl main frame 511 Combination gear 512 Spur gear 13 2 mm 513 RD ratchet 514 Ribbon planet lever assembly 515 PF motor 520 HP detector 521 CR motor frame assembly 522 CR motor 523 Belt pulley 524 E cover assembly 525 Bal...

Page 273: ...Type Eretaining ring 5 CR guide shaft G adjustment lever Driven pulley Belt pulley flange Driven pulley shaft Plain washer 3 2 x 0 5 x 7 Front head cable Rear head cable CR grounding plate Ribbon mask Release lever Release support shaft Timing belt Oil pad Parallel adjusting bushing Head cable holder Extension spring 778 gm Extension spring 32 gm Lower platen cover RD cover CBS C screw P2 M3 x 10 ...

Page 274: ...REV A A 5 CASE OUTLINE DRAWING 3 6 8 m m Figure A 17 LQ 570 Case Outline Drawing A 22 ...

Page 275: ...REV B 151 I Figure A 18 LQ 1070 Case Outline Drawing A 23 ...

Page 276: ...ower Supply Board Assembly B 17 Removing the C062 PNL Board B 18 Adjustments B 19 Circuit Adjustment B 19 Troubleshooting B 20 Error Codes B 21 Reference Materials B 23 Figures Figure B 1 C107 MAIN Board Component Layout B 5 Figure B 2 Control Circuit Block Diagram B 6 Figure B 3 Data Flow B 7 Figure B 4 Reset Circuit Block Diagram B 9 Figure B 5 Timing of Reset Signal B 10 Figure B 6 Sensor Circu...

Page 277: ... Motor Drive Modes B 12 Table B 10 Printhead Test Points B 20 Table B 11 Motor Test Points B 20 Table B 12 Driver Test Points B 21 Table B 13 Board Connector Summary B 24 Table B 14 C107 MAIN Board CN2 B 25 Table B 15 C107 MAIN Board CN3 B 26 Table B 16 C107 MAIN Board CN4 B 26 Table B 17 C107 MAIN Board CN5 B 26 Table B 18 C107 MAIN Board CN6 B 27 Table B 19 C107 MAIN Board CN7 B 27 Table B 20 C1...

Page 278: ...hanism M 5Elo LQ 570 M 5E60 LQ l 070 printer mechanism The major difference is the CR motor Faster Print Speeds Printer Model LQ 570 1 070 LQ 57011 070 Table B 2 Print Speed Comparison Print Character Pitch Condensed Columns Pitch Printing Speed Draft LQ HSD 10 OFF 80 l 36 10 225 75 NA 10 OFF 801136 10 210 70 225 LQ 570 1 070 10 ON 137 l 64 17 1 192 128 NA LQ 570 1 070 10 ON 1371164 17 1 180 120 N...

Page 279: ...4 CRT graphics II 90 720 15 0 14 0 24 Triple density 180 1440 7 5 7 0 24 Hex density 360 2880 7 5 7 0 Faster Paper Feed Speeds Friction without CSF LQ 570 LQ 1 070 LQ 570 LQ 1 070 1 Friction with CSF LQ 570 LQ 1 070 LQ 570 LQ 1 070 73 1 ms 86 0 rns 77 6 ms per l 6 inch 4 23 mm feed 2 5 ips 2 5 ips 2 2 ips continuous Tractor LQ 570 LQ 1 070 LQ 570 LQ 1 070 65 2 rns 81 1 ms 77 6 rns per l 6 inch 4 2...

Page 280: ...speed draft Table B 5 Chumcter Set Selection kme for Both Printers Country l l l 2 l 3 1 4 U S France Germany U K Denmark 1 Sweden Italy Spain 1 ON ON ON ON OFF OFF OFF OFF ON ON OFF OFF ON ON OFF OFF ON OFF ON OFF ON OFF ON OFF OFF OFF OFF OFF OFF OFF OFF OFF Table B 6 Character Table Selection Differences Character Table l 1 1 2 13 l 4 Italic Using character set selected above OFF I PC 437 U S O...

Page 281: ...to 15 lb paper maximum 17 to 24 lb maximum Lower Noise LQ 570 11070 46 5 dB A LQ 570 1070 55 B A Power Consumption LQ 570 1070 LQ 570 1070 33 W 36W 3 3 w during a self test in draft mode at 10 cpi Mean Cycles Between Failures MCBF LQ 570 1070 3 million lines excluding printhead same as LQ 570 1070 Differences in Power On Function with Buttons Held Down Button LQ 570 LQ 570 1070 LFIFF Prints PROM v...

Page 282: ... LQ 570 and the LQ 1070 use different versions of the Cl07 MAIN board The differences between the boards are shown in the table below Table B 7 Diffenznces in the Cl07 MAIN for the LQ 570 and LQ 1070 LQ 570 LQ 1070 IC16 64K SRAM Not installed Installed I BZl Buzzer and R14 lK ohm resistor for buzzer circuit installed Installed Not IC 14 PROM A0262A I WOO234 I Epson LQ 570 1 070 B 5 ...

Page 283: ...ory management functions that control the assignment of the memory and I O areas and it controls a head gate array IC2 E05A86 a PU1501 or SW 67129 for the PF and CR motor driver STA475A IC4 IC9 is transistor array for the head pins drive several sensor circuits and so on Figure B 2 shows the block diagram of the Cl07 Main Board CO62 PNL Board JlizEl 2 _ _ _ v PF Motor I v HP Sensor Rear PE Sensor ...

Page 284: ...essed sequentially The CPU transfers the print data to the printhead drive circuit The CPU sends the printhead drive pulse to the printhead drive circuit The length of this pulse corresponds to the printhead drive voltage The head drive circuit then outputs the head drive signal G A E05A86 W RAM CPU IC21 I 1 Image Data Image Transier Buffer Trigger Data output Data Latch and Delay control b Printh...

Page 285: ...e Parallel VF Holds the parallel interface functions Reset Circuit Contains the circuit that generates the RESET signal PROM RAM IC14 The PROM contains the program that runs the CPU IC15 and IC16 Holds the CPU working area and the various buffers 1 E is not used for an 80column device and is not installed Mask ROM EEPROM IC17 and IC16 Holds the character design also called the character generator ...

Page 286: ...SC pulse The electrical charge in capacitor C29 is then discharged Af er this the THLD port within E05A50 detects the low level and outputs the RESET signal from the OUT port of IC19 After time has elapsed the charge in the condenser builds up again The THLD signal is canceled and then the RESET signal is canceled Resets Performed by the CPU Itself CPU Self Reset The CPU outputs the RESET signal i...

Page 287: ...Appendix B Power On CPU Self Reset t t 5 V Line 1 THLD Figure 5 Timing of Reset Signal B 10 Epson LQ 570 1 070 ...

Page 288: ...Terminals P50 to P55 on the CPU are used for the A D converter The Vref circuit generates the A D converter reference voltage Vref CRHome Printhead Seneor Circuit TMP2 _______ 5 v I C P U IC21 P50 V R E F 4 Vref Circuit P51 0 022 j CR GAP P34 o ______ P E 2 P31 Sensor Circuit LEVER _ _ 1 Head Drive Voltage 35 V Monitor Circuit lQ c 2 _ _ _ _ _ _ _ GAP GAP Sensor Circuit Sensor Circuit _ _ _ _ _ _ ...

Page 289: ...depending on the speed of the CR motor The amount of current is set by the CPU via the E05A50 I O port Signals are sent to Vrefl or Vret2 on the STK 67128 The SIX 67128 sets the coil current to correspond to the CR motor speed Ports P60 to P63 on the CPU are used exclusively as phase control ports for the stepping motor TMP90CO41 ml I STK6712 P62 P63 IAl 60 ml E05A50 MC AX Figure B 7 CR Motor Driv...

Page 290: ...01 IC3 based on the phase data sent from the CPU When the paper advance motor is running the supply voltage to the PF motor coil is 35 V When the paper advance motor is not running and is in the hold state the supply voltage to the coil is 5 V Switching between these two supply voltages occurs at the CP terminal of the PU1501 IC3 when the switch is turned on or off TMP90C041 pu1501 PF MOTOR _ _ _ ...

Page 291: ...ate array IC21 outputs head drive signals signals HDl to HD24 that relate to voltage level through the width of the pulses These signals are output to the head for each of the section 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 ...

Page 292: ... C M3 x 10 screws that hold the main board shield plate to the main board assembly and remove the shield plate CBB C M4X 14 Screw P a Right Shield Plate CBB M4 X 10 Screw FFC Holding Plate Main Board Shield M3X 6 SCIrew Plate Cl07 MAIN Board Assembly CBS C M3 X 10 Screws Figure B IO Remouing the Main Board Shield Plate 5 Remove 1 CBB M4 x 10 screw that holds the right shield plate to the main boar...

Page 293: ... Screw Main B d Asembh Figum B 11 Main Boa Assembly ADJUSTMEWI REQUIRED After you have replaced the main board assembly you must adjust the bidirectional print alignment See Section 4 2 in the LQ 570 1070 Service Manual B 16 Epson LQ 570 1 070 ...

Page 294: ...Remove 5 CBB C M3 x 10 screws and 1 CB M3 x 8 screw that hold the power supply board assembly to the lower housing assembly Then remove the power SUPPlY Note The power supply is secured with a one way screw that requires the special tool illustrated below for removal Power supply Boald E i glWC B 12 Removing the Power Supply Board A s s e m b l y Special Tool CO62 PSB Power Supply Board Assembly M...

Page 295: ...1 Remove the front housing See Section 3 2 2 1 2 Remove the 5 CBB C M3 x 10 screws that hold the panel board assembly to the front housing Remove the panel board assembly Figure B 13 Removing the Panel Board Assembly B 18 Epson LQ 570 1 070 ...

Page 296: ...he U S who may require this information Circuit Adjustment The Cl07 MAIN board contains variable resistor VRl which is used for balancing the circuitry When any of the following components are replaced the circuitry must be balanced by adjusting VRl R6 R7 TL431 ICl and VRl If the circuitry is not properly adjusted the CPU A D converter functions abnormally and causes irregular printer operation To...

Page 297: ...f the thermistor pins Resistance 45 5 ohms I 3 2 ohms at 770 F 254 C SK ohms decreases as temperature increases Table B 11 Motor Test Points Test Method Connector Commons Test Pins Power off Set Meter to Ohms Resistance CN4 5 1 2 3 4 Place one lead on one of the commons 19 ohms CR Motor and the other lead on each of the test I 7 ohms pins at 770 F 250 C CN5 6 192 Place one lead on one of the commo...

Page 298: ...carriage motor Consistent lCl0 1 2 3 4 readings within STK6712 Place the lead on pin 5 and the I 20 lead on each of the test pins Error Codes The printer indicates errors with the following beep codes 3 beeps paper out error 5 beeps carriage error After beeping the printer goes off line and enters the error mode If the printer has detected a fatal error indicated by 5 long beeps you can find out w...

Page 299: ...n the printhead I 0 TEWl 4 18 116 ik II21 13 15 Terminal Assignment Figure B 14 Printhead Connector 0 l 0 u3 0 a 5 0 iI7 0 19 0 11 0 13 0 a15 0 Y17 0 a19 0 a21 0 1123 II240 Wire Assignment Coil Resistance 45 5 k3 2 SI at 25 Between each dot wire and common Win2 Asdgnments B 22 Epson LQ 570 1 07o ...

Page 300: ...er mechanism for the LQ 1070 ASSEMBLY 1 I 4 4 4 4 4 4 4 f MODEL 5J10 5J60 PRINTER MECHANISM GAP LEVER CRHOME PE 2 PE 1 QI YOTORPF MOTOil HEAD HEAD 4 v v v 1 9 CNlll CN121 1 CNB 1 1 CN9 1 CNlOj 1 CN4 1 1 CN5 Black and While Wh3 S Gray Wires Cl07 MAIN BOARD ASSEMBLY CNl A CN2 A Optional Interface Card KF ASSEMBLY t AC IN v I P a r a l l e l I F i Specific I F HOST COMPUTER Figure B 15 LQ 570 1070 Co...

Page 301: ...sembly L Table B 13 1 Connector CNl CN2 CN3 CN4 CN5 CN6 CN7 CN8 CN9 CNlO CNll CN12 CN13 pard Connector Summary Function Parallel interface 36 Optional interface card 36 Control panel 12 CR motor 5 PF motor 5 Printhead 17 Printhead 15 HP sensor 2 Rear PE sensor 2 Front PE sensor 2 Platen gap sensor 2 Release lever sensor 2 DC power input 11 Pins B 24 Epson LQ 570 1 070 ...

Page 302: ...ive data RXD Receive data NC Not connected RST Reset INH Inhibit CMREQ Command request ANRRDY Write ready RDREQ Read request MIR Write RD Read ICS Chip select GND Signal ground GND Signal ground GND Signal ground GND Signal ground GND Signal ground GND Signal ground A3 Address bus bit 3 A2 Address bus bit 2 Al Address bus bit 1 A0 Address bus bit 0 D7 Data bus bit 7 D6 Data bus bit 6 D5 Data bus b...

Page 303: ...al ground 11 I POWER 1 Power button 12 POWER 2 Fixed to GND Table B 16 Cl07 MAIN Board CN4 Pin No VO Signal Name Function 1 0 CRA CR motor phase A 2 0 CR A CR motor phase A 3 0 CUB CR motor phase B 4 0 CR B CR motor phase B 5 0 CRCOM CR motor common Table B l 7 Cl07 MAIN Board CN5 Pin No II0 Signal Name Function 1 0 PFA PF motor phase A 2 0 PF A PF motor phase A 3 0 PFB PF motor phase B 4 0 PF B P...

Page 304: ...mmon COM Common HD24 Head data 24 HD16 Head data 16 HD12 Head data 12 HD8 Head data 8 HD20 Head data 20 HD4 Head data 4 TEMP2 Head temperature TEMPl v u Table B 19 Cl07 BitdIN B ard CN7 Signal Name Function HD3 Head data 3 HD11 Head data 11 HD2 Head data 2 HD19 Head data 19 HD7 Head data 7 COM Common COM Common COM Common HD22 Head data 22 HD15 Head data 15 HD18 Head data 18 HD23 Head data 23 HDlO...

Page 305: ...e Function 1 I GAP Platen gap sensor 2 GND Signal ground Table B 24 Cl07 MAIN Boa CN12 Pin No l O Signal Name Function 1 I LEVER Release lever sensor 2 GND Signal ground Pin No 1 2 3 4 5 6 7 8 9 10 11 0 Table R25 Cl07 M4IN B Signal Name PSC Power button signal 5 v 5 VDC 5 v 5 VDC GND Signal ground GND Signal ground GND Signal ground GND Signal ground GND Signal ground 35 v 35 VDC 35 v 35 VDC 35 v ...

Page 306: ...Appendix B Figure B 16 Cl07 iMX lN Board Component Layout Epson LQ 570 1 070 B 29 ...

Page 307: ...Appendix B rlrwo r I 7 mp h re1 101 OP lW Lawo L _ Figure B l 7 Cl07 MAIN Board Circuit Diagram Epson LQ 570 1 070 B 31 ...

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