Epson LQ 670 - B/W Dot-matrix Printer Service Manual Download

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NOTICE

without SEIKO EPSON’s express written permission is forbidden.

The contents of this manual are subjects 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.

EPSON is a registered trademark of SEIKO EPSON CORPORATION.

General Notice:

Other product names used herein are for identification purposes only and may be

trademarks or registered trademarks of their respective companies.



1997 by SEIKO EPSON CORPORATION

Nagano, Japan

Summary of Contents for LQ 670 - B/W Dot-matrix Printer

Page 1: ...EPSON IMPACT DOT MATRIX PRINTER EPSON LQ 670 SERVICE MANUAL SEIKO EPSON CORPORATION 4007875 ...

Page 2: ...al 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 EPSON is a registered trademark of SEIKO EPSON CORPORATION General Notice Other product names used herein are for identification purposes only and may be trademarks or regist...

Page 3: ...ANUAL 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 CAUTION 1 REPAIRS ON EPSON PRODUCT SHOULD BE PERFORMED ONLY BY EPSON CERTIFIED REPAIR TECHNICIAN 2 MAKE CERTAIN THAT THE SOURCE VOLTAGE IS THE SAME AS THE RATED VOLTAGE LISTED ON THE SERIAL NUMBER RATI...

Page 4: ...ents of the printer CHAPTER 2 OPERATING PRINCIPLES Describes the theory of printer operation CHAPTER 3 DISASSEMBLY AND ASSEMBLY Includes a step by step guide for product disassembly and assembly CHAPTER 4 ADJUSTMENT Includes a step by step guide for adjustment CHAPTER 5 TROUBLESHOOTING Provides EPSON approved techniques for troubleshooting CHAPTER 6 MAINTENANCE Describes preventive maintenance tec...

Page 5: ...v REVISION SHEET Revision Issued Data Contents Rev A May 28 1997 First issue ...

Page 6: ...vi TABLE OF CONTENTS CHAPTER 1 GENERAL DESCRIPTION CHAPTER 2 OPERATING PRINCIPLES CHAPTER 3 DISASSEMBLY AND ASSEMBLY CHAPTER 4 ADJUSTMENT CHAPTER 5 TROUBLESHOOTING CHAPTER 6 MAINTENANCE APPENDIX ...

Page 7: ... 1 3 2 Interface Specification 1 18 1 3 2 1 Parallel interface Forward channel 1 18 1 3 2 2 Parallel Interface Reverse channel 1 20 1 3 2 3 Optional Interface 1 21 1 3 2 4 Interface Selection 1 21 1 3 2 5 Manual selection 1 21 1 3 2 6 Automatic selection 1 21 1 3 2 7 Interface state and interface selection 1 21 1 3 3 Prevention Hosts from Data Transfer Timeout 1 21 1 4 Operation 1 22 1 4 1 Control...

Page 8: ...s Character tables Standard version 11 tables NLSP version 20 tables Input buffer 64 Kbytes Acoustic noise 55dB A ISO7779 pattern Reliability Total print volume 6 5 million lines except print head MTBF 5000 POH Print head life 200 million strokes wire Ribbon life 2 million characters Interface Bi directional parallel interface IEEE 1284 nibble mode supported Type B I F level 2 Option Control code ...

Page 9: ...eder Bin2 C806792 Non EAI version Roll paper holder 8310 Serial I F card C82305 C82306 32KB intelligent serial I F card C82307 C82308 32KB intelligent parallel I F card C82310 C82311 Local Talk I F card C82312 32KB IEEE 488 I F card C82313 Coax I F card C82314 Twinax I F card C82315 Ethernet I F card C82331 IEEE 1284 parallel I F card C82345 Multi Protocol Ethernet I F card C82346 Note The number ...

Page 10: ...hardware specification for the LQ 670 1 2 1 Printing Method Printing Method Impact dot matrix Number of pins 24 pins Print pin arrangement 12x2 staggered Print pin diameter 0 0079 inch 0 20 mm Color Black Print direction Bi direction with logic seeking Head Center Figure 1 2 Pin Configuration ...

Page 11: ...ing the rest of that line again but at the slower speed than before Note When the head temperature rises to the upper limit the printer stops printing When the head temperature falls to the normal level the printer starts printing again but slower than before Resolution Printing Mode Horizontal density Vertical density Adjacent dot print High speed draft 90dpi 180dpi No Draft 120dpi 180dpi No Draf...

Page 12: ... mode Copy mode 1 6 inch feed 60 msec 70 msec Continuous feed 0 127MPS m sec 5 0 IPS inches sec 0 092 MPS m sec 3 6 IPS inches sec Lever Position Paper path Feeder Paper Media Friction Manual insertion front Cut sheet Single sheet Muti part Card CSF Bin1 Cut sheet Single sheet Multi part Envelope Card CSF Bin2 Cut sheet Single sheet Roller paper holder Roll paper Tractor Push tractor feed rear Con...

Page 13: ...lded not crumpled Note Printing on reclaimed paper is available only under the normal temperature and humidity condition Front Entry Manual Insertion Rear Entry CSF Minimum Maximum Minimum Maximum Width inch 3 6 11 7 3 9 11 7 mm 91 297 100 297 Length inch 3 5 16 5 11 7 3 6 16 5 mm 90 420 297 Value of line glue one side of form 92 420 Copies 1 original 4 copies 1 original 4 copies Total thickness i...

Page 14: ...t crumpled BOND paper PLANE paper or AIR MAIL No glue at a flap Not curled not folded not crumpled Note1 Printing on envelope is available only under normal temperature and humidity conditions Note2 Set the longer side of envelope horizontally Note3 Don t use CSF 2nd bin Card Front Entry Manual Insertion Rear Entry CSF Minimum Maximum Minimum Maximum Width inch 4 1 5 8 4 1 5 8 mm 105 148 105 148 L...

Page 15: ...ry Tractor Minimum Maximum Label size See the figure below Base sheet width inch 4 12 mm 101 6 304 8 Base sheet length inch 4 22 one page mm 101 6 558 8 Base sheet inch 0 0028 0 0035 Thickness mm 0 07 0 09 Total thickness inch 0 0063 0 0075 0 16 0 19 Label weight g m 2 68 lb 17 Quality A VERY CONTINUOUS FORM LABELS A VERY MINI LINE LABELS or the same quality labels Note Printing on label is availa...

Page 16: ...r Entry Roll paper holder Minimum Maximum Width inch 8 5 mm 216 Length inch mm Thickness inch 0 0028 0 0035 mm 0 07 0 09 Weight g m 2 52 82 lb 14 22 Quality Plain paper Reclaimed paper Not curled not folded not crumpled Table 1 13 Roll Paper Specification ...

Page 17: ...ngth Refer to section 1 2 4 Refer to section 1 2 4 LM Left margin 3 mm or more PW 297mm 3 mm or more PW 297mm RM Right margin 3 mm or more PW 297mm 3 mm or more PW 297mm TM Top margin 0 0mm or more 0 0mm or more BM Bottom margin 0 0mm or more 0 0mm or more Printable Area Figure 1 4 Printable Area for Cut Sheet Table 1 14 Printable Area for Cut Sheet ...

Page 18: ...gin 3 mm or more 3 mm or more RM Right margin 3 mm or more 3 mm or more TM Top margin 0 0mm or more 1 0 0mm or more 1 BM Bottom margin 0 0mm or more 0 0mm or more Note 1 When loading the paper from CSF TM Top margin is 4 2 mm or more Printable Area LM TM RM BM Figure 1 5 Printable Area for Envelope Printable Area Figure 1 6 Printable Area for Card Table 1 15 Printable Area for Envelope and Card ...

Page 19: ...ion 1 2 4 PL Length Refer to section 1 2 4 LM Left margin 13mm or more RM Right margin 13mm or more TM Top margin 4 2mm or more BM Bottom margin 4 2mm or more Printable Area Perforation Perforation Figure 1 7 Printable Area for Continuous Paper Table 1 16 Printable Area for Continuous Paper ...

Page 20: ...Refer to section 1 2 4 PL Length Refer to section1 2 4 LM Left margin 3mm or more RM Right margin 3mm or more TM Top margin 0 0mm or more BM Bottom margin 0 0mm or more Printable Area BM TM BM LM PW Figure 1 8 Printable Area for Roll Paper Table 1 17 Printable Area for Roll Paper ...

Page 21: ...Energy Star Compliant Insulation resistance 10 MΩ min between AC line and chassis DC 500V Dielectric strength AC1000 Vrms 1min or AC1200 Vrms 1 sec between AC line and chassis 230 V version Rated voltage AC220 to 240V Input voltage range AC198 to 264V Rated frequency range 50 to 60Hz Input frequency range 49 5 to 60 5Hz Rated current 0 4A max 1 1A Power consumption Approx 30W ISO IEC10561 Letter p...

Page 22: ...on Resistance to shock Operating 1G within 1ms Non operating 2G within 2ms Resistance to vibration Operating 0 25G 10 to 55 Hz Non operating 0 50G 10 to 55 Hz 1 2 11 Safety Approvals 120V version Safety standards UL1950 with D3 CSA C22 2 No 950 with D3 EMI FCC part15 subpart B class B CSA C108 8 class B 230V version Safety standards EN60950 VDE NEMKO EMI EN55022 CISPR pub 22 class B AS NZS 3548 cl...

Page 23: ...EPSON Draft Arabic 10CPI 12CPI EPSON Draft Hebrew 10CPI 12CPI EPSON Miriam 10CPI Proportional EPSON David 10CPI Proportional EPSON Naskh 10CPI Proportional EPSON Kufi 10CPI Proportional Scalable font EPSON Roman 10 5pt 8pt 32pt every 2pt EPSON Sans Serif 10 5pt 8pt 32pt every 2pt EPSON Roman T 10 5pt 8pt 32pt every 2pt EPSON Sans Serif H 10 5pt 8pt 32pt every 2pt Bar code Ean 13 EAN 8 Interleaved ...

Page 24: ...N Sans Serif EPSON Courier EPSON Prestige EPSON Script EPSON OCR B EPSON Orator EPSON Orator S EPSON Script C EPSON Roman EPSON Sans Serif EPSON Roman T EPSON Sans Serif H PC864 Arabic EPSON Draft EPSON Roman Not supported PC437 Greek PC852 East Europe PC853 Turkish PC855 Cyrillic PC857 Turkish PC866 Russian PC869 Greek MAZOWIA Poland Code MJK CSFR ISO 8859 7 Latin Greek ISO Latin 1T Turkish Bulga...

Page 25: ...GH level indicates that the printer is not ready to accept data On the other hand LOW means the printer can take data Refer to the next page for conditions when this signal becomes high level 12 PE 28 Out This signal s HIGH level indicates that the printer is in a state of paper out error Refer to the next page for the condition when this signal becomes high level 13 SLCT 28 Out Always at high lev...

Page 26: ...g conditions In the condition of the release lever error In the condition of the paper out error In the condition of the paper jam error PE signal is active high level under the following condition In the condition of paper out error Note It becomes possible to input the data without outside equipment by setting appropriate connecting Parameter Minimum Maximum tsetup 500 nsec thold 500 nsec tstb 5...

Page 27: ...ignal 2 9 DATA1 8 20 27 In Parallel input data to the printer 10 PtrClk 28 Out Printer clock signal 11 PtrBusy DataBit 3 7 29 Out Printer busy signal and reverse channel transfer data bit 3 or 7 12 AckDataReq DataBit 2 6 28 Out Acknowledge data request signal and reverse channel transfer data bit 2 or 6 13 Xflag DataBit 1 5 28 Out X flag signal and reverse channel transfer data bit1 or 5 14 HostBu...

Page 28: ...erface is busy state the selected interface is let as it is 1 3 2 7 Interface state and interface selection When the parallel interface is not selected the interface gets into a busy state When the Type B serial interface card is installed and it is not selected the interface sends XOFF and sets the DTR signal MARK When the optional interface is not selected the printer sends disable commands to t...

Page 29: ... sheet or continuous paper when the printer is out of paper Pressing it ejects cut sheet to the stacker or continuous paper to the paper park LF FF Pressing it shortly executes line feed Holding it down for a few seconds executes form feed when continuous paper is used or ejects cut sheet to the stacker when cut sheet is used Tear Off When continuous paper is used pressing it moves a page to the T...

Page 30: ...t and Others Note Others means the font selected in the Default Setting Mode Condensed Pressing it alternates condensed and non condensed mode Micro Adjust Micro Adjust switches is effective when the Micro Adjust function is enabled by Pause switch Pressing the Micro Adjust switches execute micro feed backward and forward by 1 80 inch The TOF adjustment is enabled in the TOF position after loading...

Page 31: ...s continuos paper to the Tear off position Selects CSF bin or Card mode Font Selects font Condensed Alternates condensed mode and non condensed mode Operation at power on Turning the printer on while pressing panel switches executes the function shown below Switch Function Load Eject LQ self test LF FF Draft self test Font Default setting Load Eject LF FF Data dump Condensed Tear Off Bin Clear EEP...

Page 32: ...en the printer is not paused It blinks when the Micro Adjust function is enabled or the printer is in the head hot status 2 Paper Out Red It is on when the printer is in the paper out status and it is off when the printer is out of this status 3Tear Off Bin Green 2 LEDs display the status of CSF bin selection when cut sheet is used Only a right LED is on when Bin1 is selected only a left LED is on...

Page 33: ...Ds and also the buzzer beeps as warning sign Warning sign Beeper sounds Paper out error Paper jam error Paper eject error Release lever operation error Illegal panel operation Note Beeper sounds approx 100ms and interval is approx 100ms Beeper sounds approx 500ms and interval is approx 100ms Table 1 27 Buzzer ...

Page 34: ... the selected item 8 Condensed Tear off Bin LEDs indicate the current setting value on the submenu 9 The setting value can be changed with Tear off Bin switch 10 When Tear off Bin switch is pressed printer memorizes the last setting value and changes its indication to the main menu Back to 5 11 The other items can be changed in the same manner Setting Mode Factory setting Item Setting Value Charac...

Page 35: ...e EEPROM of the main control board and retained even after the power is turned off Bi d adjustment method is as follows 1 Turning the printer on while pressing Pause switch The guide to adjust Bi d alignment in this mode is printed and first alignment pattern is printed 2 Select most closely aligned number by pressing LF FF and Load Eject switches Font LEDs show the pattern number which is selecte...

Page 36: ...rol code ESC This initialization is to clear the unprinted data to make the printer s setting defaults 1 4 5 Errors This printer goes to the error state when the following condition is detected and changes ERROR signal to LOW and BUSY signal to HIGH and stops taking data Also the printer goes unprintable condition automatically Fatal errors is detected Paper out error or paper jam error is detecte...

Page 37: ...2D C12 PF Motor drive circuit CR motor drive circuit and print head drive circuit 1 5 2 C214PSB Board This board consists of fuse filter circuit primary side diode bridge switching FET transformer and chopper IC for 5V generation Also the secondary switch is used for power and is operated by On Off of the power switch on the operation panel of the printer Gate Array IC10 Reset IC IC12 EEPROM IC9 C...

Page 38: ...e switches and 8 LEDs 1 5 4 Printer Mechanism This unit consists of carriage mechanism paper feed mechanism cut sheet transformer change over mechanism platen gap adjustment mechanism and print head 1 5 5 Housing The housing of this printer consists of upper housing printer cover front sheet guide rear sheet guide and lower housing ...

Page 39: ...2 13 2 2 2 1 Operating Principles of the Control Circuit 2 13 2 2 2 2 EEPROM Control Circuit 2 14 2 2 2 3 System Reset Circuit 2 14 2 2 2 4 Power Off Detector Circuit 2 15 2 2 2 5 Print Head Driver Circuit 2 15 2 2 2 6 CR Motor Driver Circuit 2 16 2 2 2 7 PF Motor Driver Circuit 2 16 2 2 2 8 Operation Panel Control Circuit 2 17 2 2 2 9 Interface I F Circuit 2 18 2 2 2 10 Head Temperature Detector ...

Page 40: ... the magnetic force vanishes from the iron core The actuating plate returns to its original position the position before coil was energized with spring action The dot wire also returns to its original position The mechanism is equipped with a built in thermistor for head temperature detection The temperature detected by the thermistor is converted to an electric signal and fed back to the control ...

Page 41: ...trokes wire Weight 115 12g Coil direct current resistance 39 3 2 7 Ω at 25 C Response Frequency Normal Mode 1500Hz Buzzer 1 5KHz Drive Voltage 42 3V Drive Condition Normal Drive Thick paper using multipart or thick papers Buzzer function Environmental condition Temperature 5 55 C Humidity 10 85 Print drive method Constant voltage drive method Table 2 1 Print Head Specification ...

Page 42: ...d is located on the right edge of the mechanism The detector is detected when the carriage flag interrupts the light emitted from the photo coupler The carriage home position control performs open loop control after the HP detector detects standard position After the location is determined for the carriage to move by the printing data the control circuit calculates the pulse of the motor phase cor...

Page 43: ...tepping motor Coil Resistance 3 5Ω 10 Drive Voltage 42V 5 Drive Resolution 0 106mm step 1 2 phase Drive Method Constant current drive 1 2 phase W1 2 phase Current Consumption Rated speed 0 68A phase At the waiting mode 0 2A phase Drive Frequency 667 7200Hz Table 2 3 CR Motor Specification ...

Page 44: ...e motive power is conveyed to the planetary gear When the carriage unit moves to left the pinion is rotated by the rack and the motive force is conveyed to the planetary gear Also when the carriage unit moves to the right side the driving force from the planetary gear is once conveyed into the combination gear and the combination gear drives the ratchet RD Then the ratchet RD rolls up the ribbon I...

Page 45: ...semblies located under the carriage guide shaft 2 for each up and down total 4 Paper Load Front automatic feed manual feed paper load from the CSF Paper Eject Front paper eject Push tractor Mechanism By changing the release lever from the cut sheets position to the continuous paper position manually the mode is changed from friction mode to tractor mode In the tractor mode the driving force for pa...

Page 46: ...right and left margin Paper top edge detector detects top and bottom edges Determines top and bottom margin Detects if there is any paper or not Detects paper jam after checking paper loading and ejecting PE detectors Rear Front Detects top and bottom margin Determines top and bottom margin Detects if there is any paper or not Detects paper jam and paper out if PW detector does not detect the pape...

Page 47: ... out Close Category Specification Type Mechanism type Switch Rating 0 6 1 0mA 5VDC 5 Switch Mode Paper in Open Paper out Close Category Specification Type Photoelectric transfer method Voltage 5VDC 5 Switch Mode Paper in Short Paper out Close Table 2 6 Front Paper End Detector Table 2 7 Rear Paper End Detector Table 2 8 TOP Detector Specification ...

Page 48: ... is conveyed to the paper feed advance mechanism The roller assembly PF support press the cut sheet actively and paper advance is performed In the continuous paper mode the paper advance is performed by conveying the driving force of PF motor to the tractor gear through the tractor transmission gear In this mode the roller assembly PF support is just to push the paper lightly The release detector ...

Page 49: ...er of the adjust lever Rotating the adjust lever enables the print head to get closer to or away from the platen surface The parallelism adjustment bush should set the CR guide shaft parallel to the platen surface The PG detector detects the position of the adjust lever and changes the printing speed to the copy mode when using the thick paper and setting the adjust lever more than 2 levels Catego...

Page 50: ...ncy range Fuse F1 Rating C214PSB 85 138VAC 47 63Hz 4A 125V 250V C214PSE 187 276VAC T2 0A 250V 2 2 1 1 Power Supply Overview The power supply board has two power outputs for use by various control circuits and drive mechanisms The table below shows the output voltages and applications for the two DC output supply voltages Output voltage Range of the output voltage Rated output current Range of outp...

Page 51: ...ransistor Q55 Q54 Q82 and photo coupler PC1 In order to recover from this plug off the AC cable and leave the C11 about 5 minutes in order to let it discharge electricity and remove the cause of the over voltage and turn the power on again Over Current Protection Circuit When the output current drops to 11Ω in case of 42V and 4 2Ω in case of 5V and lasted longer than 1 second over current is detec...

Page 52: ...e delay of the printing timing Interface control Parallel Type B Operation panel control PF motor control CR motor current change over 8Mbit PROM IC8 Registers control program 2 4M bit Flash ROM IC7 If this is installed instead of IC8 Registers control program 8Mbit MROM IC5 Character generate CG 1Mbit PS RAM IC6 Various buffers PST592D IC12 Reset IC System reset 93C46 IC9 3 wires system serial In...

Page 53: ...the 5V line drops out of the normal range The other CPU access is done during power supply but the access for safety is not done when the CPU is in the reset state 2 2 2 3 System Reset Circuit The reset IC IC12 of this printer sends reset signal to the CPU and gate array until 5V line for control stabilizes after the power is turned on and prevents the printer from going to mis operation EEPROM IC...

Page 54: ...ertain time passed which is about 10ms If the Power Down signal is output the CPU considers it as POWER OFF and performs POWER OFF operation After the POWER OFF is detected the CPU holds at least 32 bite writing time for the EEPROM After writing is completed the CPU reset the whole circuit system by setting the port P26 HIGH 2 2 2 5 Print Head Driver Circuit The print head driver circuit of this p...

Page 55: ... PF motor drive IC IC1 IC2 and PF motor The CPU sends phase data PFPHASEA B to the PF motor drive IC via the gate array Also the current control signals PF10A 1A PF10B 1B are outputs to the PF motor drive IC via gate array for current setting The PF motor drive IC outputs phase signals PFA PFA PFB PFB to the PF motor The CR motor is driven at open loop control bi pola rated current type by the dri...

Page 56: ...e array detects the switch condition by the port SW0 SW5 and controls LED by LED0 9 Also the POWER OFF signal PSC by the power switch on the operation panel is directly sent to the power supply circuit LED0 9 POWER SW PSC Switches SW0 5 Operation Panel Gate Array IC10 Power Supply Circuit C214PSB PSE LEDs Figure 2 15 Operation Panel Control Circuit ...

Page 57: ...detector circuit of this printer consists of PE detectors each at front and rear by micro switch and CPU Each detector opens when there is a paper and shorts when there is no paper 2 2 2 13 Paper Width Detector Circuit The paper width detector circuit consists of the paper width detector on the mask holder and CPU The paper width detector uses photoelectric transfer method and detects top and bott...

Page 58: ...ter Mechanism Removal 3 6 3 2 3 C214 MAIN Board Removal 3 7 3 2 4 C214 PSB PSE Board Removal 3 8 3 2 5 EP ROM Replacement 3 9 3 2 6 Printhead Removal 3 10 3 2 7 Ribbon Mask Removal 3 11 3 2 8 PAPER EXIT ASSY Removal 3 12 3 2 9 Ribbon Mask Holder Removal 3 13 3 2 10 PW Detector Top Removal 3 14 3 2 11 MOTOR CR Removal 3 15 3 2 12 Carriage Assy Removal 3 16 3 2 12 1 RATCHET RD Removal 3 18 3 2 13 PA...

Page 59: ... Removal 3 24 3 2 17 DETECTOR PG Removal 3 24 3 2 18 DETECTOR REL Removal 3 24 3 2 19 DETECTOR PE FRONT Removal 3 25 3 2 20 DETECTOR PE REAR Removal 3 26 3 2 21 LEVER RELEASE Removal 3 27 3 2 22 Tractor ASSY Removal 3 28 ...

Page 60: ...r on the power supply board Do not touch the heat sink attached to the switching FET Q1 on the power supply board just after power off as it may be very hot Never touch the heat sink attached to the switching FET Q1 while the AC cable is connected to the AC outlet as it is not electrically isolated Use only specified tools for disassembly and assembly of the printer Use only specified lubricants a...

Page 61: ...feed motor at the normal temperature Not too hot Checked OK Not necessary Paper Path Are all types of paper advance smoothly Checked OK Not necessary Is the tractor feeding paper smoothly Checked OK Not necessary Are all paper paths clear of an obstructions Checked OK Not necessary Is the platen free of damage Checked OK Not necessary Ribbon Mask Is the ribbon mask free of damage Checked OK Not ne...

Page 62: ...he abbreviations used in this manual for small parts such as screws and washers Table 3 3 Abbreviations and Screw Type Abbreviation Description Screw Type CB Cross recessed Bind head Screw CBS Cross recessed Bind head S Tight Screw CBB Cross recessed Bind head B Tight Screw CP Cross recessed Pan head ...

Page 63: ... the ribbon cartridge the sheet guide the platen knob from the printer before disassembly Note Exploded diagrams in APPENDIX show you how each component fit together Refer to them as necessary The flowchart below show you the basic order for disassembly CAUTION START HOUSING UPPER Removal EP ROM Removal Printhead Removal Printer Mechanism Removal Ribbon Mask Removal C214 MAIN Board Removal C214 PS...

Page 64: ...RE and remove it 3 Disconnect the cable of the control panel from a connector CN15 on C214 MAIN board 4 Remove two screws CBB M4x14 fixing HOUSING UPPER 5 Unhook two tabs fixing HOUSING UPPER to lower housing at both front and rear and remove it by lifting it upward COVER WIRE HOUSING UPPER CBB M4x14 CBB M4x14 Hooks Front Rear Figure 3 2 HOUSING UPPER Removal ...

Page 65: ...CN5 ÕPW Detector Top zCN6 ÕPrinthead Front zCN7 ÕPrinthead Rear zCN8 ÕPF Motor zCN9 ÕCR Motor zCN10 ÕREL Detector zCN11 ÕPG Detector zCN12 ÕHP Detector zCN13 ÕPE Detector Rear zCN14 ÕPE Detector Front 3 Remove four screws Mechanism fixing screw and take out the Printer Mechanism from the lower housing PRINTER MECHANISM Mechanism Fixing Screw 4 Figure 3 3 PRINTER MECHANISM Removal ...

Page 66: ...CBB M3x12 fixing C214 MAIN board and remove C214 MAIN board together with GROUND PLATE I F UPPER 7 Remove GROUND PLATE I F UPPER from C214 MAIN board 8 Remove GUIDE I F BOARD B from C214 MAIN board by unhooking two tabs 9 Remove two screws CP M3x12 fixing GROUND PLATE I F and remove it from C214 MAIN board Be careful with the edges of the shield plate as they are very sharp Make sure to match a RE...

Page 67: ...p 3 4 Disconnect the cable of C214 PSB PSE board from a connector CN3 on C214 MAIN board 5 Remove the AC inlet assembly from a connector CN1 on C214 PSB PSE board 6 Remove three screws CBB M3x12 and one plane washer fixing C214 PSB PSE board to the lower housing and take out C214 PSB PSE board CBB M3x12 Plain Washer C214 PSB PSE BOARD Cable connected to CN3 C214 MAIN Figure 3 5 C214 PSB PSE Board ...

Page 68: ...laced for program version up follow the instruction below 1 Remove two screws CBB M4x14 fixing COVER WIRE and remove it 2 Remove the EP ROM from the IC socket IC8 on C214 MAIN board When you remove or re install the EP ROM be careful not to damage the lead terminals of the IC CHECK POINT COVER WIRE EP ROM Figure 3 6 EP ROM Removal ...

Page 69: ... and remove the printhead 3 Disconnect the cables connected to the printhead Make sure that C214 MAIN board operates correctly before replacing the printhead to new one Otherwise it may be damaged again if C214 MAIN board is defective PG Adjustment See Chapter 4 Section 4 2 1 CAUTION CBS M3x10 PRINTHEAD UNIT Figure 3 7 PRINTHEAD Removal REQUIRED ADJUSTMENT ...

Page 70: ...he printhead See Section 3 2 6 2 Remove the ribbon mask from the ribbon mask holder by unhooking the tabs that hold the ribbon mask in place Be careful not to damage or deform the ribbon mask when you handle it CHECK POINT RIBBON MASK HOLDER RIBBON MASK Figure 3 8 RIBBON MASK Removal ...

Page 71: ...o screws CBS M3x6 fixing the Paper Exit Assy to the Printer Mechanism 3 First slightly pulling the Paper Exit Assy toward you then lifting it upward to remove it When re installing the Paper Exit Assy fix it while pushing it against the Printer Mechanism CHECK POINT PAPER EXIT ASSY Figure 3 9 PAPER EXIT ASSY Removal ...

Page 72: ...ibbon Mask Holder to the Carriage Assy and slightly pulling it forward 6 Disconnect the cable from PW Detector attached on the Ribbon Mask Holder and remove the Ribbon Mask Holder When re assembling the Ribbon Mask Holder make sure that the cable of PW Detector is correctly guided at the back of the Carriage Assy as shown below and is not contacting the CR guide shaft and the paper feed roller ass...

Page 73: ...screw CB M2 5x6 fixing the PW Detector Top and remove it When you fixing the PW Detector Top to the Ribbon Mask Holder be careful not to damage a screw hole on the Ribbon Mask Holder zTightening Torque 0 1 0 02Nm 1 0 0 2Kgf cm CR Guide Shaft ROLLER PF DRIVE CARRIAGE ASSY viewed from right hand side RIBBON MASK HOLDER PW DETECTOR Cable to PW DETECTOR Figure 3 11 Cable Rooting CAUTION CB M2 5x6 PW D...

Page 74: ...G 14 5 attached at the top right of the Printer Mechanism to loosen the timing belt 4 Remove four screws CBS M3x6 fixing the CR motor assembly to the Printer Mechanism and remove it 5 Remove two screws CBS M3x6 and remove MOTOR CR from MOUNTING PLATE MOTOR CR Bi D Alignment Adjustment See Chapter 4 Adjustment REQUIRED ADJUSTMENT Motor Cover TENSION SPRING 14 5 CBS M3x6 TIMING BELT MOTOR CR CBS M3x...

Page 75: ...M3x6 fixing GUIDE CR at both ends and remove it 8 Remove LEVER PULLEY DRIVEN SHAFT LEVER PULLEY DRIVEN and the driven pulley 9 Remove BUSH PARALLELISM by rotating it to match the tabs and a hole of the frame 10 Remove CR GUIDE SHAFT together with the carriage ASSY and remove the CR GUIDE SHAFT from the carriage ASSY Be careful not to lose the oil pad and a pressure spring in the carriage ASSY as i...

Page 76: ... A 3 17 SHAFT LEVER PULLEY DRIVEN LEVER PULLEY DRIVEN CAP LEVER HOLDER ADJUST LEVER TENSION SPRING 14 5 Hexagonal Nut Adjust Lever Figure 3 14 CARRIAGE ASSY Removal 1 GUIDE CR CR GUIDE SHAFT CARRIAGE ASSY Figure 3 15 CARRIAGE ASSY Removal 2 ...

Page 77: ... tabs 3 Take out RATCHET RD from the Ribbon Cartridge Holder When re installing the Ribbon Cartridge Holder to the Carriage ASSY first hook the bottom part of the Ribbon Cartridge Holder to the Carriage ASSY and hold it Then turn up the upper side of the Ribbon Cartridge Holder to the Carriage ASSY to fix it CHECK POINT Ribbon Cartridge Holder RATCHET RD Figure 3 16 RATCHET RD Removal ...

Page 78: ...IVE 9 Remove an E shaped retaining ring 2 from the left end of ROLLER PF DRIVE 10 Remove the shaft holder at the both end of ROLLER PF DRIVE 11 Remove a screw CBS M3x6 fixing the CR motor frame to FRAME ASSY LEFT 12 Take out DETECTOR PF FRONT from the paper guide 13 Slide ROLLER PF DRIVE to right once to dismount the one end of the shaft from FRAME ASSY LEFT then slide it to left to remove it 14 R...

Page 79: ...LQ 670 Service Manual Rev A 3 20 GEAR 16 ROLLER PF DRIVE COMBINATION GEAR 8 30 GEAR 36 Hook Hook Figure 3 18 PAPER GUIDE ASSY Removal 2 FRAME CR CBS M3x6 CBS M3x6 Figure 3 19 PAPER GUIDE ASSY Removal 3 ...

Page 80: ...y Rev A 3 21 ROLLER PF DRIVE Shaft Holder Shaft Holder Retaining Ring 2 E shaped Figure 3 20 PAPER GUIDE ASSY Removal 4 PAPER GUIDE CBS M3x6 CBS M3x6 Actuator DETECTOR PE REAR Slit of PAPER GUIDE Figure 3 21 PAPER GUIDE ASSY Removal 5 ...

Page 81: ...ge ASSY See Section 3 2 12 4 Remove the Paper Guide See Section 3 2 13 5 Rotate the platen shaft holder at the both ends of the platen to match a tab to a cutout of the frame assembly 6 Slide the platen to left once and remove it to upward PLATEN Retaining Ring E shaped Shaft Holder Shaft Holder Retaining Ring E shaped Washer bent Washer flat Figure 3 22 PLATEN Removal ...

Page 82: ...e Printer Mechanism See Section 3 2 2 2 Take out the cable of MOTOR PF from the cable holder at the bottom of Printer Mechanism 3 Remove tow screws CBS M3x6 fixing MOTOR PF to FRAME ASSY LEFT and remove it CBS M3x6 MOTOR PF located inside FRAME ASSY LEFT Figure 3 23 MOTOR PF Removal ...

Page 83: ...TOR PG Removal 1 Remove the Printer Mechanism See Section 3 2 2 2 Unhook DETECTOR PG from FRAME ASSY RIGHT and remove it 3 Disconnect the cable from DETECTOR PG 3 2 18 DETECTOR REL Removal 1 Remove the Printer Mechanism See Section 3 2 2 2 Unhook DETECTOR REL from FRAME ASSY RIGHT and remove it 3 Disconnect the cable from DETECTOR REL DETECTOR HP DETECTOR PG DETECTOR REL Figure 3 24 DETECTOR HP PG...

Page 84: ...der from both the Paper Guide Frame and a shaft of ROLLER PF DRIVE 4 Unhook DETECTOR PF FRONT from the holder and remove it Make sure to hook the detector holder to ROLLER PF DRIVE when reinstalling it CHECK POINT Holder DETECTOR PE FRONT Figure 3 25 DETECTOR PE FRONT Removal Rotate Hook two tabs DETECTOR PE FRONT with Holder ROLLER PAPER EJECT DRIVE Shaft Figure 3 26 DETECTOR PE FRONT Installatio...

Page 85: ...ER CABLE LOWER at the bottom of the Printer Mechanism and remove it from the Printer Mechanism 3 Remove a screw CBS M3x6 fixing DETECTOR PE REAR 4 Remove the detector holder from FRAME BASE by unhooking the fixing tabs and remove it 5 Unhook DETECTOR PF REAR from the holder and remove it DETECTOR PE REAR Figure 3 27 DETECTOR PE REAR Removal ...

Page 86: ...y may be popped out by COMPRESSION SPRING 20 Make sure that GEAR 20 moves smoothly when moving LEVER RELEASE Make sure to match the position marking on LEVER RELEASE and COMBINATION GEAR 16 16 as shown in figure below when reinstalling LEVER RELEASE CHECK POINT COMBINATION GEAR 16 16 SPUR GEAR 20 White SPUR GEAR 20 Black for Tractor COMPRESSION SPRING 1 96 Washer GEAR 20 Black LEVER RELEASE Retain...

Page 87: ...atch the tabs to a cutout of FRAME ASSY RIGHT and remove it 4 Remove the Tractor ASSY from the Printer Mechanism When re assemble the Tractor ASSY make sure to match the position marking on TRACTOR RIGHT and TRACTOR LEFT as shown in figure below while inserting SHAFT TR DRIVE into them CHECK POINT SHAFT TR DRIVE SHAFT TR GUIDE TRACTOR LEFT PAPER SUPPORT TRACTOR RIGHT Shaft Holder Hexagonal Nut Hex...

Page 88: ...4 1 Adjustment Overview 4 1 4 1 1 Required Adjustments 4 1 4 1 2 Required Adjustment Tools 4 1 4 2 Adjusting and Resetting the Printer 4 2 4 2 1 Platen Gap Adjustment 4 2 4 2 2 Factory Settings 4 3 4 2 3 Bi d Adjustment 4 5 ...

Page 89: ...eplacement Main Board Replacement Timing Belt Replacement Platen Roller Replacement or Removal CR Unit Replacement or Removal CR Motor Removal or Replacement PW TOP Detector Replacement EEPROM Initialization Note 1 means adjustment is not required Note 2 means adjustment is required 4 1 2 Required Adjustment Tools The following table shows the tools required for each adjustment Adjustment Required...

Page 90: ...t the hexagon nut securing the PG adjust lever and CR guide shaft 8 Rotate the CR guide shaft so that the big hole of the countersinking located on the right edge of the CR guide comes towards you 9 Move the carriage unit to the left edge 10 Set the thickness gauge to 0 43mm and insert it vertically between the print head and platen roller 11 Insert the screwdriver into the hole of the countersink...

Page 91: ...ng Setting file menu for default setting is shown 3URJUDP 4 D 6HWWLQJ SLQV 95 95 95 6HWWLQJ ILOH 67 7 86 67 8567 1 63 5866 1 In this Menu select DEFSTD by moving the cursor with the or and press ENTER key After the default setting following menu will be displayed 3URJUDP 4 D 6HWWLQJ 67 SLQV 95 95 95 3URFHVV VHOHFW Q OLQH 2XW RLQJ Destination Destination Code Destination Destination Code EUL Middle...

Page 92: ...ues are registered in EEPROM of the main board after the test printing make sure to perform test printing after adjustment program is completed If the wrong destination is input the correct printer performance can not be guaranteed Since this printer uses the secondary switching and AC voltage is charged on the primary side make sure to plug off the AC cable when you pull in or out the interface S...

Page 93: ... continuous paper 1p 5 Load GWBASIC and execute the adjustment program After setting destination and printing following main menu is displayed 3URJUDP 4 D 6HWWLQJ 67 SLQV 95 95 95 Q OLQH 0DLQ 0 18 L GMXVW QYHORSH SDSHU 68 0 18 RUL RQWDO 3 XW VKHHW 3 XW VKHHW 6 Select Bi D Adjust by moving the moving the cursor with the or and press ENTER key After the selection is made the following menu is displa...

Page 94: ...ure for Mode 2 and Mode 4 9 After adjustment is completed at each mode the setting value is registered by pressing ENTER key 10 To exit the program press ESC and complete the program regularly and turn off the printer Since the setting values are registered in EEPROM of the main board when the printer is turned off make sure to turn off the printer after adjustment program is completed Since this ...

Page 95: ...Chapter 5 Troubleshooting 5 1 Overview 5 1 5 2 Unit Level Troubleshooting 5 2 5 3 Repairing the Power Supply Circuit Board 5 11 5 4 Repairing the Main Board 5 14 5 5 Repairing the Printer Mechanism 5 17 ...

Page 96: ...e Recommended more than 50MHz Multimeter Analog is OK but Digital multimeter is recommended Also this printer has self diagnosis function which beeps when the printer detects error conditions Following table shows error conditions and buzzer sounds to indicate errors Indicator Error Condition Pause Paper Out Tear Off Bin Condensed Font Buzzer Paper out error On On X3 Paper Jam error On Blink X5 Pa...

Page 97: ...s turned on One or more than two LEDs are on or blinking indicating error After initialization the printer goes to error state Flowchart 2 Abnormal printing during the self test No printing operation One or more than two dots are missing Poor printing quality Flowchart 3 Abnormal paper feed Printer does not feed a paper at all Abnormal printing area Paper Jam often occurs Flowchart 4 Control panel...

Page 98: ...onnectors Normal Replace the power supply board Go back to START Normal Normal Replace the printer Mechanism Is the voltage Replace the main control board Is output voltage of the power supply board normal Refer to Table 5 4 Is the main control board replaced Input normal power supply normal Is the fuse on the power supply board dis connected Does the fuse get dis connected when power is turned on...

Page 99: ...ter mechanism Normal Replace the power supply board Normal More than 40V Normal Replace the power supply board Normal Replace the main board Replace the printer mechanism Normal Replace the main board Normal Replace the power supply board END END Does the carriage move smoothly Turn off the power move the carriage manually Foreign objects on or under the CR gudie shaft If so remove it Is 42Vof CN2...

Page 100: ... head Does the printer print Does the carriage move Is coil resistance normal Replace the print head Normal Normal NO Replace the main board Normal Normal Is printing result abnormally dark or light Reset the adjust lever Replace the printer mechanism Perform platen gap adjustment Go to other trouble shooting END END END Print somethingelse Are all the dots printed OK B Figure 5 4 Flowchart 3 ...

Page 101: ...r mechanism Is the paper set correctly Set the paper correctly Replace the printer mechanism Turn off the power supply Rotate the platen knob manually and check if it rotates smoothly Turn on the power Check if the paper is fed by SW on the panel Is paper fed normally Is the PF motor driven normally when the power is turned on Is it driven Does the knob rotate smoothly Figure 5 5 Flowchart 4 ...

Page 102: ...ace the control panel Replace the power supply board Check output voltage of the power supply board Replace the control panel Normal Replace the main board Normal Replace the printer mechanism END Operate each switch to test the printer operation checking LED indications Does the LED indicate paper out Are all switches LED displays normal Figure 5 6 Flowchart 5 ...

Page 103: ...YES NO Perform the self test Is the self test normal Go to other trouble shooting Exchange the interface cable Normal Replace the Main Board Normal Replace the power supply board Set I Fmode Auto by the control panel operation Default setting Is the I F mode set Auto Figure 5 7 Flowchart 6 ...

Page 104: ...d coil resistance can be measured between the number of each common terminal and the same wire number Direct current resistance 39 3 2 7Ω at 25 C Table 5 4 Output Voltage of the Power Supply Board View A R F R L 1 24 Wire Number C Common Terminal T Thermistor Terminal Figure 5 8 Print Head Connector Pin Alignment ...

Page 105: ... opened or not completely closed Note Turn off the printer and set the multimeter for measuring resistance or diode checking mode Detector Connector No Test Method Normal Values CN14 Front PE detector Connect one lead of the multimeter on the pin 1 and the other side to the pin2 and change over the actuator of the detector Change over Open Short CN13 Rear PE detector Connect one lead of the multim...

Page 106: ...C11 and T1 If DB1 shorts there is a possibility that it happened because of short circuit occurred in the end of the circuit Replace the power supply board DB1 or appropriate parts All output voltage is defective If 42V is not output normally other voltages become abnormal Diode bridge DB1 is defective Check if DC voltage about 170V in case of 124PSB is output between terminal pin 3 and terminal p...

Page 107: ...nt protection circuit is defective Check if the transistor Q28 is On Collector is Gp level If the transistor is Off elements in the end of PC2 circuit or main switching circuit Q1 Q31 is defective If it is on elements around Q53 or Q54 are defective Replace the power supply board Q82 Q53 Q54 or appropriate parts Over voltage protection circuit is defective Check if the transistor Q82 is On or not ...

Page 108: ...mal check the switching waveform of Q1 Q2 Q3 and also check the operation of peripheral elements and Q1 Q2 Q3 Figure 5 10 Waveform of PC1 Replace the power supply board or appropriate parts 5V output is abnormal 35V output is normal IC51 is defective Check output voltage at 9 10 pin of IC51 If output is abnormal IC51 is defective Replace the power supply board IC51 or peripheral elements Smoothing...

Page 109: ...nd sent to the CPU and gate array Replace the main board VOUT signal is output Check if 5V is normal and also check pin 7 and pin 8 of CN3 Replace the power supply board CPU does not work Clock signal is not generated Check the signal of pin 26 and 27 in the IC11 clock signal of CPU Figure 5 11 Clock Signal of CPU Replace the main board or CRU1 PROM IC8 or Flash ROM IC7 is defective Check the wave...

Page 110: ...t input gate array IC25 is defective If the drive waveform is not output IC7 is defective Pin 1 of IC3 Pin 5 of IC3 Figure 5 13 Waveform of the Carriage Motor Drive Replace the main board or IC3 Abnormal printing Print head control is abnormal Print head control circuit is defective Measure the base voltage of Q1 Q24 and collector voltage When the input signal is not detected on the base side gate...

Page 111: ...el and main board Check if the harness is broken or not If harness is broken CPU IC10 or gate array IC25 is defective Replace the main board or control panel Data from the host computer is not received correctly Indication of Data communication error or data turns out be unidentified Interface elements are defective Replace the interface cable If self test is performed normally interface elements ...

Page 112: ...again Carriage moves to left side a little bit but stops Carriage does not move smoothly Check if carriage moves smoothly by hand Clean CR guide shaft and lubricate it or replace the CR motor Carriage stops after moving to the right or left edges HP sensor is defective Replace the HP sensor Printing is abnormal Carriage moves but no image is printed Head FFC is disconnected or there is no continui...

Page 113: ...on mask Check if the ribbon is fed normally by self test Replace the Ribbon mask Ribbon feed mechanism of the carriage unit is defective Check if foreign objects are caught in the ribbon feed mechanism or parts are worn out Replace the parts of the printer mechanism or carriage unit Printing result is dirty Ink spots or dirt are seen around the printing area Hole of the ribbon mask is defective Ch...

Page 114: ...Chapter 6 Maintenance 6 1 Preventive Maintenance 6 1 ...

Page 115: ...t and especially in low temperature Therefore EPSON has been tested and analyzed various grease and oil extensively and chooses the best one for that printer Type Name Quantity Availability Part No Grease G 26 40g EPSON B702600001 Oil O 8 40cc EPSON 1019753 Ref No Lubrication Points Lubricant 1 Contact area of the frame base shaft and release G 26 3 5mg 2 Contact area around the gear 20 of the rel...

Page 116: ...LQ 670 Service Manual Rev A 6 2 Figure 6 1 Lubrication Points ...

Page 117: ...Appendix A 1 Connector Summary A 1 A 2 Circuit Diagram A 5 A 3 Component Layout A 8 A 4 Exploded Diagram A 10 A 5 Dimension and Weight A 16 ...

Page 118: ...hermistor CN7 15 Print Head CN8 4 PF Motor CN9 5 CR Motor CN10 2 Release Detector CN11 2 PG Detector CN12 3 HP Detector CN13 2 Rear PE Detector CN14 2 Front PE Detector CN15 22 Control Panel Power Supply Board CN1 2 AC line input CN2 10 DC output Power off signal Power supply board CN1 CN2 AC Power Supply Main Board CN3 CN1 CN2 CN5 CN6 CN7 CN8 CN9 CN10 CN11 CN12 CN13 CN14 CN15 Control Panel Printe...

Page 119: ...nal 2 O HD1 Pin 1 drive signal 3 O HD13 Pin 13 drive signal 4 O HD9 Pin 9 drive signal 5 O HD21 Pin 21 drive signal 6 O HD17 Pin 17 drive signal 7 42V 42VDC 8 42V 42VDC 9 42V 42VDC 10 O HD24 Pin 24 drive signal 11 O HD16 Pin 16 drive signal 12 O HD12 Pin 12 drive signal 13 O HD8 Pin 8 drive signal 14 O HD20 Pin 20 drive signal 15 O HD4 Pin 4 drive signal 16 5V 5VDC 17 I HTMP Thermistor signal Tabl...

Page 120: ...otor B phase signal 3 O PF A PF motor A phase signal 4 O PF B PF motor B phase signal Pin I O Signal Name Function 1 O CRA CR motor A phase signal 2 O CR A CR motor A phase signal 3 O CRB CR motor B phase signal 4 O CR B CR motor B phase signal 5 CRCOM CR motor common Pin I O Signal Name Function 1 I RELEASE Release Lever Signal 2 GND GND Pin I O Signal Name Function 1 I PG PG Detector signal 2 GN...

Page 121: ...ED5 LED 5 drive signal 6 O LED4 LED 4 drive signal 7 O LED8 LED 8 drive signal 8 O LED7 LED 7 drive signal 9 O LED6 LED 6 drive signal 10 5V 5VDC 11 I SW4 SW4 signal 12 I SW3 SW3 signal 13 I SW5 SW5 signal 14 GND 15 GND 16 I SW1 SW1 signal 17 I SW0 SW0 signal 18 I COPEN 19 I SW2 SW2 signal 20 I PSC Power On signal 21 O LED1 LED 1 drive signal 22 O LED0 LED 0 drive signal Table A 11 Connector Pin A...

Page 122: ...LQ 670 Service Manual Rev A A 5 A 2 Circuit Diagram Figure A 2 C214Main Board Circuit Diagram ...

Page 123: ...Appendix Rev A A 6 Heat Sink Q1 D51 Figure A 3 C214PSB Board Circuit Diagram ...

Page 124: ...LQ 670 Service Manual Rev A A 7 Heat Sink Q1 D51 Figure A 4 C214PSE Board Circuit Diagram ...

Page 125: ...Appendix Rev A A 8 A 3 Component Layout Figure A 5 C214 Main Board Component Layout ...

Page 126: ...LQ 670 Service Manual Rev A A 9 Figure A 6 C214 PSB Board Component Layout Figure A 7 C214 PSE Board Component Layout ...

Page 127: ...Appendix Rev A A 10 A 4 Exploded Diagram Figure A 8 Exploded Diagram ...

Page 128: ...LQ 670 Service Manual Rev A A 11 Figure A 9 Exploded Diagram ...

Page 129: ...Appendix Rev A A 12 Figure A 10 Exploded Diagram ...

Page 130: ...B Screw M3X12 C B B Screw M3X12 122 C B B Screw M4X14 C B B Screw M4X14 123 Hexagon Nut M4 Hexagon Nut M4 124 Harness Harness 200 Main Board Assembly Board Assembly Main 300 Power Supply Board Assembly Board Assembly Power Supply 330 Harness Harness 400 Power Cable Power Cable 450 Panel Unit Panel Unit 500 Printer Mechanism Printer Mechanism M 5060 100 501 Platen Shaft Holder Platen Shaft Holder 5...

Page 131: ...bination Gear 16 16 Combination Gear 16 16 540 Spur Gear 16 Spur Gear 16 541 Spur Gear 20 Spur Gear 20 542 Spur Gear 20 Spur Gear 20 543 Base Frame Frame Base 544 CR Frame Frame CR 545 CR Guide Guide CR 546 Gap Adjustment Lever Lever Gap Adjust 547 Ribbon Mask Ribbon Mask 548 CR Motor Mounting Plate Mounting Plate Motor CR 549 Driven Pulley Lever Lever Pulley Driven 550 Paper Guide Paper Guide 551...

Page 132: ...t PF Harness Harness PE Front 585 PG Harness Harness PG 586 RE Harness Harness RE 587 Rear PE Harness Harness PE Rear 588 CR Motor Motor CR 589 PF Motor Motor PF 590 Front PE Detector Detector PE Front 591 Rear PE Detector Detector PE Rear 592 Compression Spring 0 049 Compression Spring 0 049 600 C B Screw M2 5X5 C B Screw M2 5X5 601 C B Screw M3X6 C B Screw M3X6 602 Hexagon Nut M4 Hexagon Nut M4 ...

Page 133: ... 469mm W X 390mm D X 256mm H Body including CSF 1 bin 469mm W X 620mm D X 446mm H Body including CSF1 2 bins 469mm W X 693mm D X 446mm H Weight Body only About 9 1Kg Body including CSF 1bin About 10 9Kg Body including CSF 1 2 bins About 11 7Kg Figure A 11 Dimension of LQ 670 ...

Page 134: ...9 Sesto S Giovanni MI Italy Phone 2 262331 Fax 2 2440750 EPSON AUSTRALIA PTY LIMITED 1 70 Gibbes Street Chatswood 2067 NSW Australia Phone 2 9903 9000 Fax 2 9903 9177 EPSON SINGAPORE PTE LTD No 1 Temasek Avenue 36 00 Millenia Tower Singapore 039192 Phone 065 3377911 Fax 065 3341185 EPSON HONG KONG LTD Rooms 4706 10 47 F China Resource Bldg 26 Harbour Road Wanchai Hong Kong Phone 2585 4300 Fax 2827...

Page 135: ...EPSON SEIKO EPSON CORPORATION ...

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