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Epson SQ-1170, Service Manual

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2.2 OPERATING PRINCIPLES OF POWER SUPPLY CIRCUITRY

The power supply circuitry of this printer is provided with 

 

 board (120V) or 

board (220/240 V). Both boards operate in the same way although the elements in the primary circuit

are partly different.

The power supply unit supplies DC voltage which is used for controlling the printer of driving the printer

mechanism.

Table 2-4 shows the ratings of the power supply board.

Table 2-4. Ratings of Power Supply Board

Board Name

Input Voltage 

Fuse (F I ) Rating

103.5-132

2.5 A/ 

 V

1 9 8 - 2 6 4

1.25 A/ 250 V

2.2.1 Voltage Allocation

The DC voltage generated by the power supply circuitry is allocated to each circuit or mechanism

depending on their voltage level. The details are described in Table 2-5.

Table 2-5. Voltage Allocation

Voltage

Application

+ 3 5  

Carriage motor drive
Paper feed motor drive

Top edge motor drive

Pump motor drive
Printhead drive voltage (VH) generation

+ 5  

C076 MAIN board logic circuit
Sensors
Control panel LED

Top edge motor holding

2.2.2 Operating Principles of Power Supply Circuitry

Figure 2-37 shows the block diagram of the power supply circuitry.

The AC power supplied from the external source is first sent to the filter circuit, where higher harmonic

is cut. The AC voltage is then rectified and smoothed into the DC voltage. This DC voltage is sent to

the switching circuit and then to the smoothing circuit of the secondary circuitry, and thus dropped

to +35 

 voltage. This +35 

 voltage is fed back to the switching circuit by the + 35V line voltage

detection circuit and thus stabilized.

The +35VDC voltage is also sent to the 

 power supply circuit and thus dropped to 5

 voltage.

This circuitry is provided with four types of protection circuits as described below.

 ) + 5 

 line over voltage/current protection circuit

When the current flowing on the + 5 

 line increases, the over current protection circuit cuts

the current. When the voltage of the + 

 line exceeds a certain value 

 7V), the switching circuit

is turned off to stop the generation of +35 

 voltage. The over current protection circuit is

included in the over voltage protection circuit.

2-27

Summary of Contents for SQ-1170

Page 1: ...EPSON TERMINAL PRINTER SQ 870 1170 4001225 REV A ...

Page 2: ...ject 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 1992 by SEIKO EPSON CORPORATION Nagano Japan i ...

Page 3: ...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 4: ...ers are organized as follows Chapter 1 Provides a general product overview lists specifications and illustrates the main components of the printer Chapter 2 Describes the theory of printer operation Chapter 3 Includes a step by step guide for product disassembly and assembly Chapter 4 Includes a step by step guide for adjustment Chapter 5 Provides Epson approved techniques for troubleshooting Chap...

Page 5: ... REVISION SHEET REVISON DATE ISSUED CHANGE DOCUMENT A Feb 21 1992 1st issue L e v ...

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

Page 7: ...t 1 20 Hexadecimal Dump Function 1 20 Paper out Detection and Forms Override Function 1 20 Error Conditions 1 20 Buzzer Operation 1 21 Printer initialization 1 21 Default Values 1 22 Sheet Loading and Sheet Ejection 1 22 Tear off Function 1 23 1 6 10 Adjust Lever Operation 1 23 1 6 11 Printhead Protection 1 24 1 6 12 Ink Charge 1 24 1 6 13 Ink End Detection 1 24 1 6 14 Cover Open Detection 1 24 MA...

Page 8: ...076 PSB PSE Board l 27 Figure 1 16 Model 4710 4760 Printer Mechanism 1 28 Figure 1 17 Housing 1 28 Table 1 1 Table 1 2 Table 1 3 Table 14 Table 1 5 Table 1 6 Table 1 7 Table 1 8 Table 1 9 Table 1 10 Table 1 1 f Table 1 12 Table 1 13 Table 1 14 Table 1 15 Table 1 16 LIST OF TABLES Interface Options 1 1 Optional Units 1 2 Specifications for Cut Sheets 1 4 Specifications for Continuous Papers 1 4 Env...

Page 9: ...can make up push pull tractor Easy handling of cut sheets with the optional cut sheet feeder Continuous Paper Two ways to insert continuous paper front rear path Backout loading Continuous paper can be used without removing CSF Standard tractor unit can be attached in two positions front rear Cut Sheet Two ways to insert cut sheets front top Auto loading The SQ 870 l 170 is equipped with the stand...

Page 10: ...der 80 columns I C80648 Single bin cut sheet feeder 136 columns C80637 Second bin hopper 80 columns IC80640 I Second binhopper 136 c o l u m n s I C80023 Tractor unit 80 columns C80024 Tractor unit 136 columns SO2OO1O Ink cartridge J Figure 1 1 Exterior View of the S 2 870 1 170 0 5 e 1 2 ...

Page 11: ...es per second ips continuous Friction with CSF 49 msec 1 6 inch feed 4 0 ips continuous Tractor 45 msec 1 6 inch feed 4 5 ips continuous NOTE Following are the precautions for handling paper 1 2 Friction feed release lever in FRICTION POSITION The paper must be loaded from the front or top entrance Do not use continuous paper Do not perform any reverse paper feeds within the top 8 5 mm 34 in or bo...

Page 12: ... after the paper end has been detected Rear Push Position Release Position Figure 1 3 Release Lever Positions Paper specifications See tables 1 3 1 4 1 5 and 1 6 Table 1 3 Specifications for Cut Sheets Width 182 mrn to 257 mm 7 2 in to 10 1 in 80 columns 182 mm to 420 mm 7 2 in to 16 5 in 136 columns Length 182 mm to 364 mm 7 2 in to 14 3 in Thickness 0 065 mm to 0 10 mm 0 0025 in to 0 0039 in Wei...

Page 13: ...tures and only using top insertion Keep the longer side of the envelope horizontal during insertion Place the left edge of a No 6 envelope at the sheet guide setting mark Table 1 6 Labels Specifications Label size 2 5 in X 0 94 in 4 0 in X 0 94 in 4 0 in X 1 44 in Copies These three kinds of labels are recommended Thickness 0 22 mm 0 0079 in maximum NOTES Printing on labels is available only at no...

Page 14: ...in from the bottom edge of paper Figure 1 5 Printable Area for Cut Sheets 1 80 columns 136 columns I Printable area 4 9mm or more 0 35inch 101 254mm 4 10inch 60 columns b 101 406mm 4 16inch 136 columns Printable area 1 max 203mm 6 Oinch 60 columns 345mm 13 6inch 136 columns r 0 0 0 0 0 0 0 0 0 0 0 L 0 ABC o 1 XYZ o 0 0 0 0 0 0 0 9mm or more o 0 0 35inch o 0 0 f r 0 1 o ABC XYzo o 0 Printable o 0 c...

Page 15: ...hours until melting at 25 degrees C 77 degrees F Do not use the ink cartridge which has been stored longer than the ink life Reliability Mean cycles between failures MCBF 5 million lines excluding printhead Mean time between failures MTBF 4000 power on hours POH 25 duty SQ 870 6000 power on hours POH 25 duty SQ 1 170 Life of printhead 4000 million dots nozzle Safety approvals Safety standardsULl 9...

Page 16: ...ntal Temperature 10 to 35 degrees C 50 to 95 degrees F operating conditions 30 to 60 degrees C 22 to 140 degrees F in shipment container Humidity 20 to 80 RH operating 5 to 85 RH storage NOTE Figure 1 5 shows the operating environment I Temperature c Figure 1 7 Printer Operating Environment Resistance to 1 G within 1 ms operating shock 2 G within 1 ms storage Resistance to 0 25 G 55 Hz max operati...

Page 17: ...ts I I Family No I 10 CPI I 12 CPI I 15 CPI I Proportional I EPSON Roman o 0 0 0 0 EPSON Saris serif 1 0 0 0 0 EPSON Courier 2 0 0 0 EPSON Prestige 3 0 0 0 EPSON Script 4 0 0 0 EPSON Script C 9 0 0 0 EPSON Orator 7 0 x EPSON Orator S 8 0 x EPSON DRAFT 0 0 0 xx 0 R e s i d e n t Desired pitch is made by software using selected font x print Roman 15 CPI xx Print LQ proportional font selected by ESC ...

Page 18: ... 10 0 0 0 80 136 10 550 200 0 0 1 40 68 5 275 100 0 1 0 80 136 10 400 200 0 1 1 40 68 5 200 100 1 x o 137 233 17 1 684 342 1 x 1 68 116 8 5 342 171 12 0 0 0 96 163 12 660 240 0 0 1 48 81 6 330 120 0 1 0 96 163 12 480 240 0 1 1 48 81 6 240 120 1 x o 160 272 20 800 400 1 x 1 80 136 10 400 200 15 0 0 0 120 204 15 825 300 0 0 1 60 102 7 5 412 150 0 1 0 120 204 15 600 300 0 1 1 60 102 7 5 300 150 1 x x...

Page 19: ...80 816 55 1 120 Yes 960 1632 20 2 120 No 960 1632 20 3 240 No 1920 3264 20 4 80 Yes 640 1088 20 6 90 Yes 720 1224 55 24 32 6 0 Yes 480 816 55 33 120 Yes 960 1632 20 38 90 Yes 720 1224 55 39 180 Yes 1440 2448 20 40 360 No 2880 4896 20 48 71 180 Yes 1440 2448 20 72 360 No 2880 4896 20 73 360 Yes 2880 4896 20 DPI dots per inch IPS inches per second 1 11 ...

Page 20: ... 360 1 6 X 2 3 180 LQ 17 pitch 16 X 44 360 1 1 x 3 1 180 LQ 20 pitch 14 x 44 360 1 0 x 3 1 180 LQ proportional Max 37 X 44 360 2 6 X 3 1 180 Min 18 X 44 360 1 x 3 1 LQ proportional Max 28 X 32 360 1 8 X 2 3 180 super subscript Min 12 X 32 360 0 7 X 2 3 NOTES HDD is horizontal dot density in dots per inch Face matrix and character size indicate the maximum size of a character This value is dependen...

Page 21: ...aO a2 46 Descender area 47 48 L L Character width CW 4 17 18 1 45 46 47 48 3 4 29 30 31 32 Sub script character From dot No 1 to 16 are not I while subscri t txinting Super script character From dot No 33 to 48 are not used while superscript printing L Figure 1 8 Character Matrix 1 13 ...

Page 22: ...11 Connector Pin Assignments and Signal Functions Pin Signal Name Return Dir Functional Description No Pin No 1 STROBE 19 IN STROBE pulse to read the input data Pulse width must be more than 0 5Ks 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 1 4 DATA 3 22 IN LOW level means O 5 DATA 4 23 IN 6 DATA 5 24 IN 7 D...

Page 23: ... Ground for twisted pair grounding 3 4 Not used 3 5 OUT Always HIGH Pulled up to 5V through 3 3K ohm resistor 3 6 SLCT IN IN If LOW when the printer is initialized 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 conditi...

Page 24: ...er condition is not detected as in the Forms Override function 5 TEAR OFF BIN l BIN 2 Button In tractor feed mode pressing this button advances continuous paper to the tear off position and the TEAR OFF indicator is Iitln friction feed mode pressing this button toggles between bin 1 and bin 2 and the selected BIN indicator is lit c 6 MICRO FEED Button Selects or cancels the micro feed function Whe...

Page 25: ...pplied 2 PAUSE orange Lit when the printer is in PAUSE mode no printing no paper feed or no data accepting 3 DATA orange Lit when the printer has received data from the host machine 4 PAPER OUT red Lit when the paper out detector detects no paper Refer to Section 1 6 3 Paper out Detection and Forms Override Function 5 INK END red Lit when the printer detects the ink empty condition 6 MICRO FEED or...

Page 26: ...signal Table 1 12 Settings for DIP Switch 1 SW1 used to set various print DIP switches is read only No Description ON OFF Factory Setting 1 International See ON 2 character set and PC Table 1 14 ON 3 selection ON 4 Character table selection Graphic Italic OFF 5 Graphic print direction Unidir Bidir OFF 6 Not Used OFF 7 OFF 8 OFF Table 1 13 Settings for DIP Switch 2 SW2 Factory No Description ON OFF...

Page 27: ...OFF OFF OFF Spain 1 437 When SW 1 4 is ON L If italic table was selected by ESC t O country setting becomes U S When SW 1 4 is OFF if graphic table was selected by ESC t 1 PC becomes 437 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 1 is connected to GND the SLCT IN signal is fixed to LOW and DC l DC...

Page 28: ...or checking the data the printer has received from the host If input data is a control code rather than a character code a period is printed in the ASCII column 1 6 3 Paper out Detection and Forms Override Function When the paper out detector detects a paper out condition the printer enters the PAUSE mode with the following status PAPER OUT indicator lit BUSY signal becomes HIGH ERROR signal becom...

Page 29: ...ected beeps 3 times for 0 1 second respectively with 0 1 second intervals Ink end error is detected beeps 5 times for 0 1 second respectively with 0 1 second intervals Cover open error is detected beeps 5 times for 0 1 second respectively with 0 1 second intervals Fatal error is detected beeps 5 times for 0 5 second respectively with 0 5 second intervals When panel setting is accepted beeps 1 time...

Page 30: ...e release lever has a disengage capability of tractor unit drive mechanism Therefore this printer provides some improved paper handling in combination with the release lever a Automatic cut sheet loading without cut sheet feeder G Change the release lever to friction feed position and put a cut sheet with the paper guide rear or front insertion A few seconds laster the cut sheet is automatically l...

Page 31: ...n and TEAR OFF indicator is lit In this condition tear off condition the tear off position is adjustable by using the MICRO FEED functionln the MICRO FEED function pushing the LINE FEED button pushes the paper forward and pushing the FORM FEED button pulls the paper backward The adjusted position is memorized into the nonvolatile RAM and remains effective even if the power is turned off If necessa...

Page 32: ...aning Pressing the CLEANING button 1 6 12 Ink Charge second about 20 seconds Install the ink cartridge to the printer and turn the printer power on while pressing the CLEANING switch down The Ink Charge function is started It takes about 3 minutes to complete this functionlt is needed only at the first time the new printer is used 1 6 13 Ink End Detection If ink end sensor detects ink end conditio...

Page 33: ...d repair of the printer The main components are 1 2 3 4 C076 MAIN board the main control board the CPU on this board controls all main functions Control panel unit C076 PSB PSE M 47 10 4760 board the the printer power supply mechanism C076 PSB PSE Board board C076 MAIN Board n 4 1 Figure 1 12 SQ 1 170 Component Layout Printer Mechanism M 4760 1 25 ...

Page 34: ...d contains a logic circuit and printer PF motor Stepping motor driver STK67 12B Printhead driver MPD 16322 Others following memories and gate arrays are assigned in the EEPROM Reset IC MB3771 Reset IC PST529C Switching Regulator TL494 Lithium battew Ic14 IC 19 22 23 lC3 4 24 Ic12 Iclo Ic17 IC16 Ic 11 lC8 9 IC2 IC21 IC7 IC20 BAT 1 A lithium battery in the battery circuit backs up the head cleaning ...

Page 35: ...7 3 C076 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 C076 PSB board is 120V input type and the C076 PSE board is 220 240V input type P o 0I Figure 1 15 C076 PSB PSE Board 1 27 ...

Page 36: ...r top edge holding mechanism pump motor pump mechanism printhead and sensors This printer mechanism allows three ways of paper insertion o Figure 1 16 Model 4710 4760 Printer Mechanism 1 7 5 Housing The LQ 870 l 170 housing consists of the upper lower and front cases The front case houses the control panel The lower case contains the printer mechanism the main control circuit board and power suppl...

Page 37: ...hanism 2 18 Ink Cartridge and Ink End Sensor Mechanism 2 20 Wasted Ink Drain Tank 2 2l Operational Sequence of Ink Mechanism 2 22 2 1 5 Case Open Interlock Switch 2 26 OPERATING PRINCIPLES OF POWER SUPPLY CIRCUITRY 2 27 2 2 1 Voltage Allocation 2 27 2 2 2 Operating Principles of Power Supply Circuitry 2 27 OPERATING PRINCIPLES OF CONTROL CIRCUITRY 2 29 2 3 1 2 3 2 2 3 3 2 3 4 2 3 5 2 3 6 2 3 7 2 3...

Page 38: ...Rear Push Tractor Feed 2 9 Figure 2 16 Top Entrance Friction Feed Method 2 10 Figure 2 17 Rear Entrance Push Tractor Method 2 l O Figure 2 18 Rear Entrance Push Pull Tractor Method 2 l 1 Figure 2 19 Front Entrance Friction Feed Method 2 11 Figure 2 20 Front Entrance Push Tractor Method 2 12 Figure 2 21 Front Entrance Push Pull Tractor Method 2 l 2 Figure 2 22 Top Edge Holder Mechanism 2 l 3 Figure...

Page 39: ...gram 2 31 Paper Feed Motor Drive Circuit 2 32 Carriage Motor Drive Circuit 2 33 Printhead Drive Circuit 2 34 Charge Discharge Circuit 2 35 Head Charge Condition 2 35 Head Discharge Condition 2 35 Timing for Discharge Charge Pulse 2 36 Block Diagram of Pump Motor Drive Circuit 2 36 Block Diagram of TE Motor Drive Circuit 2 37 Block Diagram of Timer Circuit Backup Circuit 2 37 EEPROM Control Circuit...

Page 40: ...This printer mechanism consists of the printhead unit paper feed unit ink mechanism and sensors Figure 2 1 shows the block diagram of the printer mechanism Model 47 10 4760 LOCK PF PE FPE R F T i s Cover Open B M S S S Paper Feed TE EDGE 1 M S TE Holder CM EN TH DG HEAD IE IE2 PM G I 1 I Ink I I Punp Unit I y e aln i t nnmeau Cartridge I Cap Cleaner 1 1 Figure 2 1 Block Diagram of Printer Mechanis...

Page 41: ... also moves which results in the change of pressure within the tube The head damper is used to absorb this change of pressure and prevent the ink from rushing into the reservoir Reservoir The ink supplied into the printhead is once stored in the reservoir O Nozzle The ink stored in the reservoir is injected through nozzles The structure of a nozzle is shown in Figure 2 3 Reserver Piezoelectric Ele...

Page 42: ... Printing Principles 3 When charging ink or cleaning the printhead the ink in the pressure chamber is vacuumed out by the pump When printing on the other hand the ink is simultaneously injected and supplied according to the change of volume of the pressure chamber This printer is provided with the function to change the printhead drive voltage corresponding to the ink temperature because the visco...

Page 43: ... different from each other Therefore the controller can recognize the moving direction of the carriage by detecting this difference The controller can also recognize the carriage speed from the signals sent from the encoders These signals are also used to adjust print timing This printer is not provided with a home position sensor Instead the carriage is designed to hit the left stroke end each ti...

Page 44: ...AP ADJUST depending on the thickness of paper When the head adjust lever is operated it turns the carriage guide shaft SHAFT CR GUIDE MAIN and makes the carriage closer farther to from the platen The shaft has an eccentric cross section LEVER GAP ADJUST r o L Figure 2 8 Adjustment of Platen Gap 2 5 ...

Page 45: ...ear Entrance Front Entrance Friction Feed OK No OK Push tractor Feed No OK OK Push pull Tractor Feed No OK OK A NOTE Pull Tractor Method cannot be used alone on this printer 2 1 3 1 Paper Feeding Mechanism The details of each paper feed method is described below Friction Feed Method The cut sheet paper is held by the platen paper feed rollers and paper tension roller When the paper feed motor STEP...

Page 46: ...ller and push tractor The paper is thus driven in the direction of the white arrow as pushed by the push tractor pins and pulled by the paper tension roller In this method the release lever must be set to Push Tractor position where the paper feed rollers are set free from the platen Figure 2 10 shows the push tractor method from the rear entrance and the front entrance c P Rear Entrance Platen Fr...

Page 47: ...or w Figure 2 11 Push Pull Tractor Method 2 1 3 2 Release Lever Operation The friction feed method and the tractor feed method can be switched to each other with the release lever LEVER RELEASE MAIN When the release lever is set to the Friction Feed position the paper feed rollers are made to contact the platen When the lever is set to the Tractor position on the other hand the paper feed rollers ...

Page 48: ...able either Therefore you can set continuous paper to each push tractor front and rear and switch between the two only by shifting the lever Platen Gear Platen Drive Roller Pinion Gear o Front GEAR 34 5 Figure 2 13 Arrangement of Gears in Friction Feed or Full Release o Front Tractor Gear Tractor Feed Tractor Gear Figure 2 14 Arrangement of Gears in Front Push Right Frame Figure 2 15 Arrangement o...

Page 49: ...is detected by the rear PE sensor DETECTOR ASSY REAR ear PE Sensor Rollers u Figure 2 16 Top Entrance Friction Feed Method Rear Entrance The rear entrance is used in the tractor feed method Push tractor method or Push pull tractor method The paper inserted through this entrance is detected by the rear PE sensor DETECTOR ASSY REAR Paper Paper Tension y de Roller 7 I y Rear Entrance p at PR 1 Jilr F...

Page 50: ...ont entrance is used in the friction feed method or the tractor feed method Push tractor method or Push pull tractor method The paper inserted through this entrance is detected by the front PE sensor DETECTOR PE FRONT Paper Paper Tension Roller Printhead Roller Paper Feed Roller Figure 2 19 Front Entrance Friction Feed Method 2 11 ...

Page 51: ...r Printhead Front PE Sensor Figure 2 20 Front Entrance Push Tractor Method Paper Paper Tesion Roller A Pull Tractor x i 1 I Pnnthead 7 4 Front PE Sensor Front Push Tractor Figure 2 21 Front Entrance Push Pull Tractor Method c L 2 12 ...

Page 52: ...n while holding the paper When the top edge of paper reaches the position where the paper tension roller comes down to hold the paper the top edge holder plate is enclosed behind the eject guide plate The TE Top Edge sensor is used to detect whether or not the top edge of paper is at the position to be held by the holder plate It consists of a photo sensor which emits light toward the paper and de...

Page 53: ...idge sensor Pump unit Pump mechanism Pump motor Cap mechanism Printhead cleaning mechanism Cleaner blade Rubbing blade Carriage lock mechanism Wasted ink drain tank Figure 2 23 shows the system outline of the ink mechanism CR Valve Pnnthead Wasted Ink Drain Tank I 1 iiP u Pump Motor Ink Tank Figure 2 23 Outline Ink Mechanism System 2 14 ...

Page 54: ...Gear 1 Gear I Cleaner Lever Rubbing Cleaner Blade CR Stopper Figure 2 24 Pump Motor Table 2 2 Rotational Direction and Operation of Each Part Rotational Direction Operation of Each Part C c w Resets the carriage lock Pumps ink into the wasted ink drain tank Reset the cleaner blade Resets the rubbing blade Cw Sets the carriage lock Resets the pump Sets the cleaner blade 2 15 ...

Page 55: ... the pump When the pump motor rotates CCW the pulley pumps in the wheel pump unit rotate in the direction of the arrow while compressing the ink tube This makes the ink in the tube move toward the used ink pack When the pump motor rotates CW the pulley pumps are shifted inward and detached from the ink tube Pumping Pump motor CCW No Pumping Pump motor CW Wheel Pumo c Pulley Pump Pumping CCW No Pum...

Page 56: ...ping is automatically performed when the carriage hits the left stroke end At this time the cap covers the printhead nozzles while the slider valve closes the air inlet When the carriage moves right ward in this condition the slider valve is released from the air inlet and allows the air to enter the capped section so that the cap can be easily separated from the printhead Carriage Movement Carria...

Page 57: ...e carriage is repeatedly rubbed against the pad set in the carriage path In the cleaner blade operation the ink etc stuck to the nozzles is scraped off when the carriage is repeatedly passed along the blade set in the carriage path The rubbing pad and the cleaner blade are united into a single part When the carriage moves from left to right the cleaner blade operation is performed Or when the carr...

Page 58: ...t The spur gear will be disengaged from the cleaner lever as soon as the lever is either set or reset Cleaner Lever Printhead Figure 2 30 Set Reset of Cleaner Lever The cleaner lever is also used as a carriage lock lever When the printhead is locked in the capped state this lever functions as a printhead holder and prevents the cap from coming off in a shock ner Lever riage Stopper Print riage Fig...

Page 59: ...hes within the ink cartridge holder Ink End Sensor DETECTOR ASSY INK and Ink Cartridge Sensor HOLDER ASSY INK CARTRIDGE The ink end sensor detects the ink end detection plate while the ink cartridge sensor detects the ink cartridge When an ink end condition is detected the status will not be recognized until another 200 lines are printed When absence of ink cartridge is detected however the ink en...

Page 60: ...has the absorber to collect used ink through the tube and the opening which lets out the vapor from ink This tank is provided with a sufficient capacity to collect the waste ink that is used during the whole printer life From Pump Wasted Ink II I 1 11 1 Absorber J 2 21 Figure 2 34 Structure of Wasted Ink Drain Tank ...

Page 61: ...de operation 1 This operation is performed to remove dust etc from the printhead Refer to 2 1 4 4 for the details Cleaner blade operation 2 This operation is performed to remove dust etc from the printhead following the ink charge operation It consists of the cleaner blade operation and 3000 pulse ink flushing operation that follows Cleaner blade operation 3 This operation is petformed to remove i...

Page 62: ...inting The negative pressure release operation and 2600 pulse flushing operation 0 5 second waite and 2600 pulse flushing will be performed without performing the cleaning operation After this operation the printhead will be capped again c Carriage Position Home position Timer Value More than 7 days The pump performs the ink charge operation for 4 seconds to replace the ink in the tube This operat...

Page 63: ...operation and cleaner blade operation 2 o 3 Refreshing operation This operation is performed to prevent the ink in the nozzles from getting sticky Two modes of operation are provided as follows a Refreshing operation 1 This operation is performed every 15 seconds in the continuous printing mode The carriage is moved to the flushing position and then 10 pulse ink flushing operation will be performe...

Page 64: ...f rubbing operation 5 times ink charge operation 5 seconds and negative pressure release operation will be repeated 3 times followed by the ink charge operation for 5 seconds negative pressure release operation and cleaner blade operation 2 c False initial charge operation This operation is performed if one of the following conditions occurs when the user operates the initial charge operation The ...

Page 65: ...ory EEPROM on the Main Board If the time exceeds the predetermined value 4 1000 points the replacement message is displayed The time spent for ink discharge operation is converted to point values at the following ratio 2 seconds 10 points 4 seconds 23 points 5 seconds 30 points 7 seconds 40 points 60 seconds 400 points 2 1 5 Case Open Interlock Switch The carriage of this printer moves at a high s...

Page 66: ...it Sensors Control panel LED Top edge motor holding 2 2 2 Operating Principles of Power Supply Circuitry Figure 2 37 shows the block diagram of the power supply circuitry The AC power supplied from the external source is first sent to the filter circuit where higher harmonic is cut The AC voltage is then rectified and smoothed into the DC voltage This DC voltage is sent to the switching circuit an...

Page 67: ...oard I I I I t I I I 1 I I I 1 I I 1 1 I I I I I I I I I I I I I I I I I I I I 1 I 1 I I I I I I I I I I I I Primary t h Filter Clrcult I 11 Secondary WT I I Circuil I I I 1 Smoothing Circurt 1 I I I A I I I I I I 35 line I Detector Circuit I I I i I I I 5 line 1 Voltage f Overload Protection 1 Cirwit I I I I I I 35 line i Voltage Overload I Protection I Circuit I I I I i I 35 line Voltage 1 Drop ...

Page 68: ...ion and E05A48 a gate array to control DC motors Figure 2 38 shows the control circuitry block diagram I 1 7 I C o n t r o l Case Open Panel j Sensor I l I C076 MAIN Board I I I D Parallel l F I 1 1 Option I I l F I I I J I n EEPROM IC2 I I I I I I I I I I I I I I I I I I 1 I r GA E05A65 IC12 I L uPD1 6322 SOH03 IC8 9 IC16 I I I I I I I I I I I I I 1 I I I I I I I I 3 PU1501 IC18 t STK 6712B Icll ...

Page 69: ... panel and receives signals from each sensor E05A65 Ic12 This gate array executes the following functions Memory management 1 0 Port Printhead control EEPROM control Parallel interface Control panel control i05A48 Ic 10 This gate array controls the carriage motor DC motor by detecting the motor speed and carriage position SLA4391 Ic17 This IC drives the carriage motor DC motor TK67 12B Ic 11 This ...

Page 70: ... 7 sensors are described in this section They are Ink Cartridge Sensor Ink End Sensor Platen Gap Sensor Friction Tractor Select Sensor Top Edge Sensor Paper End Sensor Front and Paper End Sensor Rear The signals from these sensors are directly inputted to the CPU port For the other sensors refer to each circuit as follows Ink temperature detector Thermistor Head drive circuit 35VDC under voltage d...

Page 71: ...rcuit is made by STK67 126 which detects the current flowing in the coil of the stepping otor and keeps the current constant by cutting the current that exceeds a certain value This value can be set at user s option through the external circuit The value set by the external circuit is inputted through the port on E05A65 and outputted to STK67 126 in 4 steps The motor retaining mode is also include...

Page 72: ...ase open sensor interlock switch When the printer cover is opened during printing operation the printer immediately stops printing and moves the carriage to the capping position to cap the printhead Also when the interlock switch is activated the interlock resistor is inserted in series into the carriage motor drive circuit to decrease the motor torque The purpose of this function is to protect us...

Page 73: ...its HDSTB signal as soon as the data transmission for 48 nozzles is completed The head is controlled by CHG and DSCHG pulses CPU IC5 35V D VH supply VH circuit Thermistor Bus 1 E I J PTS E05A48 IC1O uPDI 6322 IC6 9 r 1 1 CHG STB BLK CLK B CHG STB BLK I 1 CLK A I B I L VH Charge Circuit E05A65 IC12 ALDCHG HDSTB DSCHG HDCLK I I I I I I I I i I I I I I I I I I I I I I I I I I I I I I i I Print head F...

Page 74: ...electric Element Figure 2 45 Head Charge Condition Discharge pulse The data for 48 nozzles stored in the gate array E05A65 is serially transmitted from HDDAT port to the printhead drive IC pPD 16322 Following this the discharge pulse is transmitted from E05A65 to KPD 16322 The KPD 16322 then discharges PZD according to the print data to cause the nozzles to inject ink PZD is always charged by Vh F...

Page 75: ...urpose several zener diodes used for detecting output voltage and a DIC jumper are provided When the printhead or the MAIN board is replaced adjust the DIC jumper to connect the zener diodes in proper arrangement For safety this circuit is automatically disconnected when a case open condition is detected 2 3 7 Pump Motor Drive Circuit Figure 2 48 shows the block diagram of the pump motor drive cir...

Page 76: ...ck Diagram of TE Motor Drive Circuit 2 3 9 Timer Circuit and Backup Circuit Figure 2 50 shows the block diagram of the timer circuit and the backup circuit The timer circuit TC8521 AM on CPU bus outputs the time data used for the pump unit sequence control The operation of this circuit is independent of the main power ON OFF state The backup circuit is used to back up the timer circuit in the main...

Page 77: ...r is ON the data is stored in the RAM But the data in the RAM will be erased as soon as the main power is turned off To maintain the data this printer monitors 35 VDC line through PST529C IC7 and as soon as the voltage goes lower than 25 VDC approx transfers the data from the RAM to the EEPROM The data in EEPROM is read written by to E05A65 in serial mode 35VDC PST529C CPU BUS GA Serial EEPROM IC7...

Page 78: ... SUPPLY Board Removal 3 18 3 2 6 HOLDER ASSY INK CARTRIDGE Removal 3 1 9 3 2 7 Printer Mechanism Disassembly 3 20 3 2 7 1 Disassembly of PAPER HOLDING ASSY 3 20 3 2 7 2 Disassembly of CAPASSY 3 21 3 2 7 3 Disassembly of PUMP ASSY and CLEANER ASHY 3 22 3 2 7 4 FRAME FRONT Removal 3 23 3 2 7 5 Carriage Motor DC MOTOR CR Removal 3 24 3 2 7 6 Disassembly of Carriage 3 25 3 2 7 7 STEPPING MOTOR PF Remo...

Page 79: ...re 3 17 POWER SUPPLY Board Removal 3 18 Figure 3 18 HOLDER ASSY INK CARTRIDGE Removal 3 19 Figure 3 19 Assembling TORSION SPRING 3490 and COVER HOLDER INK CARTRIDGE 3 19 Figure 3 20 Disassembly of PAPER HOLDING ASHY 3 20 Figure 3 21 Disassembly of CAP ASHY 3 21 Figure 3 22 Disassembly of PUMP ASSY and CLEANER ASSY 3 22 Figure 3 23 FRAME FRONT Removal 3 23 Figure 3 24 Carriage Motor DC MOTOR CR Rem...

Page 80: ...bly of Frame Assembly RIGHT 3 33 Setting Release Lever 3 34 Disassembly of Tractor Assembly 3 35 Tractor Set Position 3 35 LIST OF TABLES Ink Handling Steps 3 2 Service process 3 6 Tools 3 7 instruments 3 7 Abbreviations List of Small Parts 3 8 Form and Abbreviated Part Name of Screw 3 8 Service Check List 3 9 Connector Connection 3 16 S iii ...

Page 81: ...ng so may result in leakage burning or explosion The leakage may affect other devices mounted close to the battery d Do not charge the battery An explosive gas may be generated inside and causes burning or explosion e Do not disassemble nor distort the battery The gas inside the battery may hurt your throat Leakage burning or explosion may also result f Do not mount the battery in the wrong direct...

Page 82: ...e to c transportation or storage If you are sure the user is going to use the printer within a week you can deliver the printer with ink charged Ink discharge operation You can discharge all the ink in the mechanism by performing the cleaning operation for about 10 times with the false ink cartridge set in the ink cartridge holder In this operation you have to turn off the printer power after ever...

Page 83: ... FEED switch The TEAR OFF LED blink When the MICRO FEED LED blink push the FORM FEED switch When all LEDs on the control panel power off Ink charge initial charge Ink charge refers to filling the ink path with ink You can execute the ink charge by turning on the power while holding down the cleaning switch The PAUSE button blinks during the operation which takes 3 or 4 minutes This operation can o...

Page 84: ...he printer is used The value will be printed out under the name of ROM version if you perform Self test e g The printer used for 2 years indicates the value 10 000 If the counter value cannot be printed out due to malfunction of the printer weigh the tank and replace it if it exceeds 240g If you have replaced the tank reset the counter in the following procedure 1 Turn the power on while holding d...

Page 85: ...llowing preparations are properly made before delivering the printer Capping Removing ink cartridge Setting shockproof attachments Packaging St bPacking Material Protective Sheet Packing Material Figure 3 3 Setting Shockproof Attachments 3 5 ...

Page 86: ...test Check Ink cartridge Test Print 5 On line test Check Ink cartridge On line Print 6 Filling preservation Fill the ink path Preservation liquid Refer to Page 3 3 liquid with the liquid cartridge 7 Capping Cap the head Power on off 8 Packaging Set shockproof attachments 4 Maintenance Perform lubricating adhering and cleaning according to Chapter 6 Maintenance after disassem bling assembling and o...

Page 87: ...s Tool Availability Part No Round nose pliers o B740400 100 Nippers o B740500 100 Tweezers o B74 1000100 Soldering iron o B740200 100 E ring holder 2 5 o B 7 4 0 8 0 0 4 0 0 E ring holder 3 o B740800500 E ring holder 4 o B740800600 E ring holder 6 o B740800800 Phillips screwdriver No 2 0 B 7 4 3 8 0 0 2 0 0 Normal screwdriver o B743000 100 Box driver 7 mm across o B74 1700200 Tension gauge 3 000 g...

Page 88: ...ew Cross recessed Bind head screw C P B tite Screw Cross recessed Pan head B tight screw C B S Screw Cross recessed Bind head S tight screw C B P Screw Cross recessed with Plain washer screw C C Screw Cross recessed Cup head screw C P S P Screw Cross recessed Pan head S tight with plain washer screw Table 3 6 Form and Abbreviated Part Name of Screw Heed Body washer bled Top Side 1 ross recessed he...

Page 89: ...ecked INot necessary feeding smoothly Is the tractor feeding the paper IChecked INot necessary correctly Is the paper path clear of all IZChecked INot necessary obstructions Wasted Ink Is the tank full llChecked INot necessary Drain Tank Self test Was the self print test successful Checked Not necessary On line test Was the on line test successful 13 Checked INot necessary djustment Printhead Are ...

Page 90: ...tempting to disassemble the unit Before disassembly remove shockproof attachments used for transportation Before disassembly remove paper and ink cartridge This section consists of the following seven paragraphs 1 Housing Removal 2 Printhead Replacement 3 Wasted Ink Drain Tank Replacement 4 Printer Mechanism Removal 5 Circuit Board Removal 6 Ink Cartridge Holder Removal 7 Printer Mechanism Disasse...

Page 91: ...EAR to the HOUSING UPPER to remove the COVER GEAR Unscrew C B screw M4 X 16 attaching the HOUSING UPPER and C B B screw M3 X 12 attaching the HOUSING FRONT to the HOUSING UPPER C B B Screw M3 X 12 I C B Screw M4 X 16 C B B Screw M3 x 12 UPPER Figure 3 6 Housing Removal 1 Remove 3 pawls attaching the HOUSING FRONT to the HOUSING UPPER 80 column printer 2 pawls Pull the HOUSING FRONT toward you and ...

Page 92: ...7 Discharge ink Refer to section 3 1 1 Remove the housing Refer to section 3 2 1 Remove C B S screw M3 X 8 fastening the PRESSING PLATE COVER SPRING LOWER to remove the PRESSING PLATE COVER SPRING LOWER Release the carriage lock Refer to section 3 1 1 Disconnect FPC of the printhead from 2 connectors on the carriage Remove 2 screws CUP screw M3 X 8 attaching the printhead to the carriage Loosen th...

Page 93: ...SCREW with a tightening torque of 1 kg Refer to section 3 1 2 Mount the printhead on the carriage and fasten the printhead with 2 screws CP P M3X 8 See Figure 3 9 Attach the cover TUBE to the frame FRONT with the screw CUP screw M3 X 8 and the PRESSING PLATE COVER SPRING UPPER Loosen the screw CUP screw M3 X 8 which fasten the printhead along with the PRESSING PLATE COVER SPRING UPPER and then adj...

Page 94: ...n describes how to replace the wasted ink drain tank Step 1 Remove the housing Refer to section 3 2 1 Step 2 Separate the pump tube from the wasted ink drain tank TANK INK EJECT ASSEMBLY POINTS Be sure to apply the pump tube through the retaining hole before attaching the pump tube Be sure to set the wasted ink drain tank TANK INK EJECT in the correct direction onto th HOUSING LOWER If you have re...

Page 95: ...e printer mechanism Refer to section 3 1 1 Unscrew 3 C C U screws M3 X 8 and 1 C B B screw M3 X 12 to remove the SHIELD PLATE I F Printer Mechanism C C U Screws M3 X 8 MAIN Board SHIELD PLATE l F C C U Screw M3 X 8 C B B Screw M3 X 12 Figure 3 13 Removing SHIELD PLATE l F Separate the pump tube from the wasted ink drain tank Remove the TUBE SUPPLY INK from the ink cartridge holder by removing the ...

Page 96: ...sufficient care not to damage the FPC Step 9 Remove the printer mechanism M R Figure 3 15 Printer Mechanism Removal ASSEMBLY POINTS Be sure to mate the connectors with each correct partner referring to the Table below Table 3 8 Connector Connection Printer Mechanism Side I MAIN Board Side Release detector White 2 Pin CN8 White PE sensor Front Yellow 2 Pin CN9 Yellow TE sensor Blue 3 Pin CN 10 Blue...

Page 97: ...pecial care in handling these connectors Step 1 Step 2 Step 3 Step 4 Step 5 Step 6 Remove the housing Refer to section 3 2 1 Remove the printer mechanism Refer to section 3 2 4 Unscrew CCU Screw M3 X 8 which fastens the GROUNDING PLATE RIGHT to the HOUSING LOWER and remove the GROUNDING PLATE RIGHT and the COVER MAIN BOARD Unscrew the 2 screws C B S TITE screw M3 X 12 which fasten the COVER CONNEC...

Page 98: ...ent in the specified sequence 1 Printhead drive voltage adjustment Refer to section 4 4 2 Print position adjustment Refer to section 4 5 2 3 2 5 2 POWER SUPPLY Board Removal Step 1 Step 2 Step 3 Step 4 Remove the housing Refer to section 3 2 1 Remove the printer mechanism Refer to section 3 2 4 Disconnect the connector CN4 on MAIN board Unscrew the 3 screws C B B screw M3X 12 X 2 and C C U screw M...

Page 99: ...ve the HOLDER ASSY INK CARTRIDGE together with the TORSION SPRING 3490 and the COVER HOLDER INK CARTRIDGE f A o 1 HOLDER ASSY INK CARTRIDGE ING LOWER Figure 3 18 HOLDER ASSY INK CARTRIDGE Removal ASSEMBLY POINTS Before attaching the HOLDER ASSY INK CARTRIDGE to the HOUSING LOWER assemble the TORSION SPRING 3490 and the COVER HOLDER INK CARTRIDGE onto the HOLDER ASSY INK CARTRIDGE Figure 3 19 Assem...

Page 100: ... Remove the TORSION SPRING 6750 LEFT from the hook on the left frame Step 3 Remove the TORSION SPRING 6750 RIGHT from the hook on the right frame Step 4 Remove the TORSION SPRING 6750 LEFT from the left hook of the PAPER HOLDING ASSY Step 5 Remove the TORSION SPRING 6750 RIGHT from the right hook of the PAPER HOLDING ASSY Step 6 Remove the two E rings 4 thatfasten the PAPER HOLDING ASSY and then r...

Page 101: ...ws C B S screw M3x8 which fasten the FRAME STRENGTHEN LEFT and remove the FRAME STRENGTHEN RIGHT Step 4 Unscrew C B B screw M3x8 which fastens the CAP ASSY to the FRAME FRONT and remove the CAP ASSY Step 5 Separate the tube of the PUMP ASSY from the CAP ASSY CAP ASSY FRAME STRENG THEN RIGHT I C B S Screws M3 X 8 C B B Screw M3 X Figure 3 21 Disassembly of CAP ASSY 3 21 ...

Page 102: ...o section 3 2 4 Remove the CAP ASSY Refer to section 3 2 7 2 Remove the TUBE SUPPLY INK from the PUMP ASSY Unscrew two screws C B S screw M3X 8 which fasten the PUMP ASSY to the frame and remove the PUMP ASSY Separate the CLEANER ASSY from the frame CAUT N Never touch the rubber section of the CLEANER ASSY Figure 3 22 Disassembly of PUMP ASSY and CLEANER Screws M3x8 ASSY 3 22 ...

Page 103: ... 6 Step 7 Step 8 Step 9 mechanism Unscrew C B S screw M3 X 8 which fastens the resistor to the rear of the printer and remove the resistor Unscrew C B S screw M3 X 8 which fastens the FRAME STRENGTHEN RIGHT to the FRAME FRONT Carefully peel off FPC from the FRAME FRONT FPC is adhered to the FRAME FRONT with adhesive double coated tape Unscrew two screws C B S screw M3 X 8 which fastens the FRAME F...

Page 104: ... MOTOR CR to the FRAME FRONT and remove the carriage motor together with the MOUNTING PLATE MOTOR CR Unscrew the 2 screws CUP screw M3 X 5 which fasten the carriage motor to the MOUNTING PLATE MOTOR CR and remove the carriage motor from the MOUNTING PLATE MOTOR C R C C Screws M3x8 MOUNTING Timiny Belt PLATE ASSY PULLEY DRIVEN FRAME FRONT CARRIAGE MOTOR DAMPER MOUNTING PLATE MOTOR CR C7 CR Figure 3...

Page 105: ...NT and remove the timing belt from the MOUNTING PLATE ASSY PULLEY DRIVEN and pulley of CR motor Remove the 3 FLANGE NUT M4 which fasten the SHAFT CR GUIDE MAIN and SHAFT CR GUIDE SUB to the FRAME FRONT and then remove the carriage together with the SHAFT CR GUIDE MAIN and SHAFT CR GUIDE SUB Timing Belt C B S Screws M3 X B FLANG NUT M4 w p i Figure PLAIN WASHER FPC Wk spR NG FRAMEFR SPACER CR GUIDE...

Page 106: ...ing Timing Belt REQUIRED ADJUSTMENT ITEMS If you have reassembled the carriage make the following adjustment in the specified sequence 1 Timing belt tension adjustment Refer to section 4 3 2 Platen gap adjustment Refer to section 4 1 3 Platen gap adjustment Refer to section 4 2 4 Printhead slant adjustment Refer to section 4 5 1 5 Print position adjustment Refer to section 4 5 2 e c L j 3 26 ...

Page 107: ...PF STEPPING MOTOR PF d CUP Screw d A GHT P f M3x8 C B S Screw M3 X 8 Figure 3 28 STEPPING MOTOR PF Removal 3 2 7 8 STEPPING MOTOR TOP EDGE HOLDER Removal Step 1 Remove the housing Refer to section 3 2 1 Step 2 Remove the printer mechanism Refer to section 3 2 4 Step 3 Unscrew the 2 screws C B S screw M3X8 which fasten the STEPPING MOTOR TOP EDGE to the right frame and remove the STEPPING MOTOR TOP...

Page 108: ...ixes the GUIDE PAPER EJECT to the left frame and remove the GUIDE PAPER EJECT Step 8 Unscrew the 2 screws C B B screw M3X6 which fasten the PAPER GUIDE ASSY SUPPORT to the frame LEFT RIGHT and remove the PAPER ASSY SUPPORT Step 9 Remove the PUMP ASSY and the CLEANER ASSY Refer to section 3 2 7 3 Step 10 Unscrew C B screw M2X4 which fastens the SENSOR SUB ASSY PW to the TOP EDGE HOLDER and remove t...

Page 109: ... ASSEMBLY POINTS When assembling the GUIDE PAPER EJECT be sure to hook the TORSION SPRING 700 to the GUIDE PAPER EJECT When attaching the SENSOR SUB ASSY PW make sure the adhesive double coated tape is completely covered by FPC Before setting the platen set up the other parts as shown in the figure below Take the alignment of the HOLDER PLATEN RIGHT and HOLDER PLATEN LEFT Figure 3 32 Aligning HOLD...

Page 110: ...djustment in the specified sequence 1 Timing belt tension adjustment Refer to section 4 3 2 Platen gap adjustment Refer to section 4 1 3 Platen gap adjustment Refer to section 4 2 4 Printhead slant adjustment Refer to section 4 5 1 5 Print position adjustment Refer to section 4 5 2 C2 c 3 30 ...

Page 111: ... Step7 Remove the STEPPING MOTOR TOP EDGE HOLDER Referto section 3 2 7 8 Step8 Unscrew the 3screws C B S screw M3X8 X2and C B S screw M2 5X6 Xl which fasten the FRAME ASSY LEFT and remove the FRAME ASSY LEFT Step 9 Remove the ROLLER ASSY DRIVE ROLLER ASSY DRIVE X 6 Figure 3 33 Disassembly of PAPER GUIDE 1 Step 10 Unscrew the 3 screws C B S screw M3X8 X2 and C B S screw M2 5X6 X 1 which fasten the ...

Page 112: ...irection of SHAFT RELEASE I REQUIRED ADJUSTMENT ITEMS If you have reassembled the carriage make the following adjustment in the specified sequence 1 Timing belt tension adjustment Refer to section 4 3 2 Platen gap adjustment Refer to section 4 1 3 Platen gap adjustment Refer to section 4 2 4 Printhead slant adjustment Refer to section 4 5 1 5 Print position adjustment Refer to section 4 5 2 c J 3 ...

Page 113: ...N ASSY Refer to section 3 2 7 9 Unscrew C C screw M3 X 8 which fastens the FRAME SUB RIGHT and remove the FRAME SUB RIGHT Remove the release lever from the FRAME ASSY RIGHT Remove the INTERMITTENT GEAR and the SPUR GEAR 27 from the FRAME ASSY RIGHT Remove the COMBINATION GEAR 8 30 from the shaft C on the FRAME ASSY RIGHT Remove the COMPRESSION SPRING 200 the PLAIN WASHER 10 3 X 0 5 X 18 7 and the ...

Page 114: ...sifien I Figure 3 37 Setting Release Lever c Z REQUIRED ADJUSTMENT ITEMS If you have reassembled the carriage make the following adjustment in the specified sequence 1 Timing belt tension adjustment Refer to section 4 3 2 Platen gap adjustment Refer to section 4 1 3 Platen gap adjustment Refer to section 4 2 4 Printhead slant adjustment Refer to section 4 5 1 5 Print position adjustment Refer to s...

Page 115: ...ove the E rings 6 attached on the SHAFT TR DRIVE and remove the tractors left right TRACTOR GEAR FRAME TR LEFT LEVER Th RIGHT Figure 3 38 Disassembly of Tractor Assembly r_ AssEMBLypO NTs When attaching the tractor to the SHAFT TR DRIVE make sure that the reference marks meet each other as shown n the figure below I Figure 3 39 Tractor Set Position I 3 35 ...

Page 116: ...JUSTMENT ON MAIN BOARD 4 10 LIST OF FIGURES Figure 4 1 Setting of Dial Gauge 4 1 Figure 4 2 Platen Gap Parallelism Adjustment 4 2 Figure 4 3 SHAFT CR MAIN Installation Direction 4 2 Figure 4 4 Platen Gap Adjustment 4 3 Figure 4 5 Timing Belt Tension Adjustment 4 4 Figure 4 6 Notice Sheet on Spare Printer Mechanism 4 5 Figure 4 7 Jumper Setting 4 7 Figure 4 8 Print Check Pattern 4 8 Figure 4 9 Head...

Page 117: ...ance between the platen and the printhead platen gap uniform at column 1 and column 136 column 80 in case of 80 column printer Since it has already been adjusted in the assembling line before shipment you need not adjust it But if you have changed the setting of LEVER PARALLEL ADJUST when repairing this printer you should make this adjustment Step 1 Remove the printhead Refer to section 3 2 2 Step...

Page 118: ... platen gap Refer to section 4 2 after this adjustment 4 2 PLATEN GAP ADJUSTMENT This adjustment is to make the distance between the platen and the printhead 1 00 0 05mm If this adjustment is not performed properly print quality will be degraded This adjustment is required when you loosened the flange of the shaft CR MAIN or replaced the printhead I CAUTION I When making this adjustment do not all...

Page 119: ... 00 mm O 05 mm x Prmthead and o Carriage Platen SHAFT CR MAIN Figure 4 4 Platen Gap Adjustment Step 3 Set the adjust lever to the normal paper printing position and tighten the FLANGE NUT M4 Step 4 Pull out the thickness gauge If the thickness gauge does not come off easily loosen the FLANGE NUT M4 again and go back to Step 2 Step 5 Apply Neji lock to the FLANGE NUT M4 NOTE Be sure to perform prin...

Page 120: ...d the timing belt for disassembling or assembling the printer or when the bi directional print position cannot be aligned Step 1 Center the carriage Step 2 Loosen the 3 screws C B S screw M3X8 attachin9 the MOUNTING PLATE ASSY PULLEY DRIVEN to the frame Step 3 Engage the tensiOn gauge to the hook of the MOUNTING PLATE ASSY PULLEY DRIVEN and adjust the belt tension Tension value 1 500 1009 PULLEY D...

Page 121: ...e jumper located on the MAIN board Step 1 Remove the printer mechanism Refer to section 3 2 4 Step 2 Check the printhead drive voltage in one of the following ways 1 When only the MAIN board is replaced Remove the printhead from the carriage and check the head drive voltage printed at the bottom and then put it back onto the carriage 2 When the printhead is replaced Check the head drive voltage pr...

Page 122: ...x 120 7 122 1 Y 118 8 120 6 z 117 1 118 7 B x 115 5 117 0 Y 113 8 115 4 z 112 4 113 7 c x 110 8 112 3 Y 108 8 110 7 z 106 8 108 7 D x 105 3 106 7 Y 103 7 105 2 z 102 0 103 6 E x 100 4 101 9 Y 8 5 100 3 z 7 0 9 8 4 F x 5 2 9 6 9 Y 3 6 95 1 z 2 0 93 5 G x 10 4 91 9 Y 18 5 90 3 z 6 8 88 4 H x 5 0 86 7 Y 3 0 84 9 z A 4 6 ...

Page 123: ...resistor 20 OKohm 1 F59 1 to connector CN 16 on the MAIN board Set the digital multi meter to the test terminal TP3 and TP4 on the MAIN board Connect the control panel to CN 19 and short circuit the pin no 1 and no 3 of the connector CN2 on the control panel Refer to section 5 1 for the details Turn on the power Adjust the volume VR2 on the MAIN board until the digital multi meter indicates the sp...

Page 124: ...Step 7 Step 8 Step 9 Load 15 inch continuous paper for 136 column printer or 10 inch continuous paper for 80 column printer to the front push tractor Open the upper case and set the control panel so that CASE OPEN will not be detected Refer to Section 5 1 for the details Connect the printer to the personal computer and turn on the printer power Turn on the power for the personal computer and start...

Page 125: ...e parts tolerance of the printer mechanism and the deviation of print timing between odd numbered lines and even numbered lines in bi directional print This printer stores the compensation related data in EEPROM on the MAIN board You should perform this adjustment in the following conditions The The The The The MAIN board is replaced cartridge replacement counter is cleared i e the contents of EEP...

Page 126: ...d press the return key and go to Step 13 If they are not aligned enter another value and press the return key to check the output Continue this procedure until they are aligned Step 13 When the return key is pressed in Step 12 vertical Iines are printed at SPEED2 in bi directional print mode The compensation value of 7 is automatically selected NOTE The compensation value 7 is a specific value jud...

Page 127: ...OF THE PRINTER MECHANISM 5 18 LIST OF FIGURES Figure 5 1 Troubleshooting Procedure 5 1 LIST OF TABLES Table 5 1 Resistance of Motor Coil 5 1 Table 5 2 Error Display s 5 1 Table 5 3 Extension Cables 5 2 Table 5 4 Symptoms and Reference Pages 5 3 Table 5 5 Repair of Power Supply Board 5 11 Table 5 6 Repair of Main Board 5 13 Table 5 7 Repair of Printer Mechanism 5 18 S i ...

Page 128: ...l Resistance 7 8ohms f 10 at 20 degrees C pauer feed motor Coil Resistance 19 5ohms 7 at 25 degrees C Top edge holder motor I Coil Resistance 790hms 10 at 25 degrees C I Pump motor Coil Resistance 1 17ohms I Table 5 2 Error Display Buzzer 5 times of O l second beep with O l second intervals 5 times of 0 5 second beep with 0 5 second intervals 3 times of O l second beep with 0 1 second intervals 3 ...

Page 129: ... I Top edge sensor I F579 I 1011024 I CN9 I Paper end sensor front I F578 I 1011025 I CN 11 Paper end sensor rear F579 1011024 CN 18 Printhead F574 and F575 1011027 CN 17 I Printheaci I R5i16 and F577 1 0 1 1 0 2 6 I CN 13 TE motor F580 1011023 CN 15 CR motor F594 B765 1054101 CN 12 Pump motor F578 1011025 CN 14 Paper feed motor F580 1011023 in order to make the printer operate with the case open ...

Page 130: ... is indicated by LED or buzzer 5 5 Print failure occurs during self o Printing is not performed 5 7 test Faulty printing some of the dots are not printed Bad print quality density etc Paper is not fed normally o No paper is fed 5 8 Feeding is irregular Paper jam occurs Control panel does not func When LF or FF switch is pressed in PAUSE 5 9 tion normally mode no paper is fed Each function cannot b...

Page 131: ...ower on Use the correct input voltage Yes Replace the fuse and pull out CN4 on the MAIN board No Check the outpui volta e of the power 1 boar No Replace the MAIN board No 1 Replace the printer mechanism I Yes 7 Replace the power board ND T7 ND 5 4 ...

Page 132: ...5 2 Yes Check the cable connection on the control panel Connect the cable Yes Turn off the power Replace the supply and try to control Panel move the carriage manually No Replace the printer mechanism Yes Yes No 4 I I A A I Replace the MAIN board I Yes v END Yes END 5 5 ...

Page 133: ... r es Replace the HOLDER ASSY INK CARTRIDGE Yes Wasted ink drain tank overflow I 57 Replace the wasted ink drain tank ND Y Replace the MAIN board N 5 6 ...

Page 134: ...elf test I No No I connected correctly dot is missing or Yes Connect each connector print density correctly is incorrct I v Yes Press the CLEANING Excute the adjustment SW for printhead slant and Bi d print Yes Replace the printhead I No Yes v ND No Yes Replace the printer mechanism b 4 v END 5 7 END ...

Page 135: ...hin the paper the paper path Remove any stray pieces or other foreign objects I L f Turn o the power I No turn smoothly A Replace the printer Yes mechanism Replace the MAIN board Was the paper feed No motor coil damaged by overheating No b 6 Yes Replace the printer mechanism Replace the MAIN board ND v I ID rAI 63 5 8 ...

Page 136: ...REV A 5 Control panel does not function normally No Yes Connect the control panel cable correctly No 4 Replace the control panel F7 ND No Yes Replace the MAIN board Yes 4 v ND ND ...

Page 137: ... Refer to other sedon for troubleshooting Check the setup values between printer and host computer Parallel Yes Replace option No interface board No Adjust the setup vakIe Replace the interface cable between printer and host computer 4 No I Replace the MAIN Yes board END ND 7 c 5 1o ...

Page 138: ...upply board The table below provides various symptoms likely causes and checkpoints The checkpoints refer to waveforms resistance and other values to be checked to evaluate the operation of each component Check these values and take the appropriate action Table 5 5 Repair of Power Supply Board 5 11 ...

Page 139: ...35V line Check the 35V line does not op dead is dead crate at all IC51 is Check the oscillation waveform and switching Replace dead waveform of IC51 IC51 1f T A P 4ttt t t 3 2V 20 s Oscillation Waveform IC51 pin 5 I I d i l H 1 P tttl 1 1 mk I Switching Waveform IC51 pin 8 Q51 or Q52 Replace is dead Q51 or Q52 Q 5 12 ...

Page 140: ...N board The table below provides various symptoms likely causes and checkpoints The checkpoints refer to waveforms resistance and other values to be checked to evaluate the operation of each component Check these values and take the appropriate action Table 5 6 Repair of Main Board 5 13 ...

Page 141: ... G Rcmair nf Main Board Cont Cause Checkpoint Solution Either CG or Replace CG RAM is or RAM defective CPU is defective Check the oscillator signal at either pin 53 or 54 of the CPU tttt tu l l l Hi ii i t l t i m t l H t I t 20ms I If signal is detected re place CPU Otherwise replace CR2 c 5 14 ...

Page 142: ...rate normally Conditon The carriage does not op erate at all Cause IC 10 is defective ICI 7 is defective Checkpoint Check the oscillator waveform at pins 27 25 32 and 31 of ICIO At IC 17 compare the waveform at pin 2 with that at pin 4 Solution Replace Ic 10 Replace Ic17 5 15 ...

Page 143: ...REV A T hlta RR Ransir nf the Main Board Cont w w 5 16 ...

Page 144: ...t all nism does ICI 8 is Check the output signal of IC 18 Replace not operate defective normally IC 18 The pump The pump IC12 or Check the waveform at pin 1 and 2 of ICI 2 Replace does not op motor does IC16 is and pin 15 and 9 of IC 16 IC12 or 16 crate not rotate at defective normally all Abnormal Data is not ICI 2 is Check the input output signal of IC 12 Replace print in un received defective I...

Page 145: ...orbed go through the properly connected tube is properly properly used ink tube dur to the cap connected to the ing the cleaning cap operation The ink tube is Check the ink tube Replace the tube damaged visually The cap is Check for any de Replace the head defective fective part cap The pump is Replace the pump Replace the pump defective to see if this caus unit es the ink to be ab sorbed normally...

Page 146: ...iage move Check whether the Clean and moves to the left ment is not carriage moves lubricate slightly and then smooth smoothly when stops moved manually Check tension of Adjust tension of the timing belt the timing belt The carriage The encoder is Replace the moves to the left defective encoder or right end and then stops Printing is not The carriage The ink end sensor Check the ink end Replace th...

Page 147: ...perly connector Check the Clean cleanliness The printhead is Replace the print Replace defective head to see if this causes printing to be performed normally Ink is poorly Check whether the See Ink is not absorbed used ink goes Absorbed through the used ink tube Printed characters The platen gap is Check the platen Adjust the gap are not aligned not adjusted gap Head inclination is Adjust the head...

Page 148: ... properly Paper feeding Release mecha Check the release Replace the defec method cannot be nism is defective mechanism tive parts changed Paper is not fed Foreign substance Visually check the Remove any for are lodged in the paper path eign substance paper path Paper feeding Visually check the Replace defective gears are gears gears defective The paper feed mo Measure the coil Replace the PF tor i...

Page 149: ...c ...

Page 150: ...FIGURES Figure 6 1 How to Apply Adhesive 6 1 Figure 6 2 Lubrication Points l 6 3 Figure 6 3 Lubrication Points 2 6 4 LIST OF TABLES Table 6 1 Lubricants and Adhesive 6 1 Table 6 2 Lubrication Points Refer to Figure 6 2 to Figure 6 3 6 2 Table 6 3 Adhesive Application Points Refer to Figure 6 2 to Figure 6 3 6 2 i ...

Page 151: ...the printer be lubricated at the points as listed in Table 6 2 The two recommended lubricants are EPSON O 5 G 1 4 both of which have been tested extensively and found to comply with the needs of this printer Table 6 1 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 dirty or affect the...

Page 152: ...N LEFT G 1 4 5 Carriage pad and CARRIAGE SUB o 5 Table 6 3 Adhesive Application Points Refer to Figure 6 2 to Figure 6 3 r Ref No I Adhesive Application Point o Screw fastening top edge assembly 1 4 of the perimeter Screw fastening SENSOR ASSY PW 1 4 of the perimeter Timing belt 2 teeth Head fastening screw right side only 1 4 of the perimeter LEVER PARALLEL ADJUST 1 4 of the perimeter I FLANGE NU...

Page 153: ...REV A Figure 6 2 Lubrication Points 1 6 3 ...

Page 154: ...REV A L Figure 6 3 Lubrication Points 2 6 4 ...

Page 155: ...rol Panel Board Circuit Diagram Figure A 9 C076 MAIN Board Component Layout Surface Figure A 10 C076 MAIN Board Component Layout Back Side Figure A 1 1 C076 PSB Board Component Layout Figure A 1 2 C076 PSE Board Component Layout Figure A 1 3 SQ 870 Exploded Diagram 1 Figure A 1 4 SQ 870 Exploded Diagram 2 Figure A 1 5 SQ 870 Exploded Diagram 3 Figure A 1 6 SQ 1 170 Exploded Diagram 1 Figure A 1 7 ...

Page 156: ...A 20 Table A 21 CNBoard Connector Summary CN2 C076 Main CN3 C076 Main CN4 C076 MAIN CN5 C076 MAIN CN6 C076 MAIN CN7 C076 MAIN CN8 C076 MAIN CN9 C076 MAIN CN1O C076 MAIN CN11 C076 MAIN CN12 C076 MAIN CN13 C076 MAIN CN14 C076 Maid CN15 C076 Main CN16 C076 Main CN17 C076 Main CN18 C076 MAIN CN19 C076 MAIN CN20 C076 MAIN Part No Reference Table A 2 A 3 A 3 A 4 A 4 A 4 A 4 A 4 A 4 A 4 A 4 A 4 A 4 A 4 A...

Page 157: ...18 CN17 CN13 CN15 2P 2P 2P 2P 3P 2P 3P 26P 36P 6P 2P r I I I I I C A R T R I D G E I I 1 A w 2P CN1 1 6P CN1 CN3 60P MAIN BOARD ml 11P CN4 Power Supply Board 36P I 1 I r l I OPTION I F BOARD I I I 1 I I Parallel I I I Specific l F I J I I I I HOST COMPUTER I I I IE2 Ink Cartridge Sensor IE Ink End Sensor GAP Platen Gap F T Friction Tractor Sensor EDGE Top Edge Sensor PEF PE Sensor Front PER PE Sen...

Page 158: ...sor 2 CN7 PG sensor 2 CN8 Release sensor 2 CN9 Paper end sensor front 2 CN1O Top edge sensor 3 CN 11 Paper end sensor rear 3 CN 12 Pump motor 2 CN 13 Top edge motor 6 CN14 Paper feed motor 6 CN 15 Carriage motor 2 CN 16 For adjustment 2 CN 17 Printhead 36 CN 18 Printhead 26 CN 19 Control Panel 16 CN20 2 C076 PSB PSE CN 1 AC power input 2 board CN3 DC power output C076 MAIN board 11 Control Panel C...

Page 159: ...Read strobe 12 0 CGA13 CG address bit 13 13 0 CGA I 4 CG address bit 14 14 0 RAM 14 RAM address bit 14 15 0 CGA I 5 CG address bit 15 No 1 0 Signal Name Function 16 0 RAM 15 RAM address bit 15 17 0 CGA16 CG address bit 16 18 0 RAM 16 RAM address bit 16 19 0 CGA17 CG address bit 17 20 0 AO Address bit O 21 0 Al Address bit 1 22 0 A2 Address bit 2 23 0 A3 Address bit 3 24 0 A4 Address bit 4 25 0 A5 ...

Page 160: ... No 1 0 Signal Nama Function 1 I m Platen gap sensor 2 GND Signal ground Table A 8 CN8 C076 MAIN No I 1 0 Signal Name Function I 1 i Ffi Release sensor 2 GND Signal wound 1 2 3 4 5 6 0 0 0 0 TEA TE motor phase A TE A TE motor phase A TEB TE motor phase B TE B TE motor phase B TECOM TE motor common TECOM TE motor common Table A 14 CN14 C076 MAIN T No 1 0 1 0 2 0 3 0 4 0 5 6 Signal Name PFA PF A PFB...

Page 161: ...No 1 0 Signal Name Function 1 COM Common 2 COM Common 3 0 HD 1 Head data 1 4 0 HD3 Head data 3 5 0 HD5 Head data 5 6 0 HD7 Head data 7 7 0 HD9 Head data 9 8 0 HD 11 Head data 11 9 0 HD 13 Head data 13 10 0 HD 15 Head data 15 11 0 HD 17 Head data 17 12 0 HD 19 Head data 19 13 0 HD21 Head data 21 14 0 HD23 Head data 23 15 0 HD25 Head data 25 16 0 HD27 Head data 27 17 0 HD29 Head data 29 18 0 HD31 He...

Page 162: ...53 co Re tifier Figure A 4 C076 PSB Board Circuit A 9 ...

Page 163: ...4 4 4 IJ 1 I 4 b 4 b 4 s v 5 s w 0 v Figure A 5 C076 PSB Board Circuit A 10 ...

Page 164: ...1 L 1 I I I 1 z 44 7 r J 1 u u u L Ill R e c t i f i e r I Figure A 6 C076 PSE Board Circuit A 1 1 F i l t e r Diagram ...

Page 165: ...1 1 1 1 N a I I r c1 L k Figure A 7 C076 PSE Boerd Circuit Diagram A 1 2 J ...

Page 166: ... 11 I 1 I L I 1 Figure A 8 Control Panel Board Circuit Diagram A 1 3 ...

Page 167: ...REV A A 3 CIRCUIT BOARD COMPONENT LAYOUT la J m u s la 1 J u Ei c Kx Figure A 9 C076 MAIN Board Component Layout Surface A 1 4 ...

Page 168: ...REV A C301 J n CIW Rl C7 am E c1 clo3 u d a R70 n Figure A 10 C076 MAIN Board Component Layout Back Side A 1 5 ...

Page 169: ...REV A II II L J CM I 1 s2 Nil w n L2 1 r os II l lu JSI 10 I I A ii c n I P5ZI m 8 A iu bmn wa I 1 Lu I m Figure A 1 1 C076 PSB Board Component Layout A 1 6 ...

Page 170: ...REV A II I L R16 w CN I I I I I I CN3 21 r I I I E k E ich S Assy 2 0 0 4 2 2 5 0 0 CHK S4Xl Figure A 1 2 C076 PSE Board Component Layout A 1 7 ...

Page 171: ...B RIGHT FRAME STRENGTHEN RIGHT FRAME STRENGTHEN LEFT FRAME ASSY LEFT Ref No 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 524 525 526 527 528 529 530 531 532 533 534 535 536 538 539 540 541 542 543 545 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 Description FRAME ASSY RIGHT MOUNTING PLATE MOTOR CR DC MOTOR CR RESISTOR HARNESS TOP EDGE DETECT CARRIA...

Page 172: ...R GUIDE SUB NTERMITTENT GEAR COMBINATION GEAR 8 30 PUR GEAR 27 SPUR GEAR 34 5 PUR GEAR 34 PUR GEAR 34 5 APER FEEDING REDUCTION GEAR IASE RUBBER ORSION SPRING 3490 COMPRESSION SPRING 200 EXTENSION SPRING 328 ORSION SPRING 6750 ORSION SPRING 6750 ORSION SPRING 700 COMPRESSION SPRING OCKING WIRE SADDLE Ref No 633 634 635 636 637 638 639 640 641 642 643 644 645 646 648 649 650 651 652 653 654 655 656 ...

Page 173: ...REV A A 5 CASE OUTLINE DRAWING II h I 1 r H I I w I J 325 mm I r T 3 Figure A 19 SQ 870 Case Outline Drawing A 26 ...

Page 174: ...REV A 1 I 1 I 1 1 I I I 1 yK 1 1 I 1 1 1 1 J 325 mm Figure A 20 SQ 1 170 Case Outline Drawing A 27 ...

Page 175: ...dborough 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 ITA...

Page 176: ...EPSON Printed in Japan 92 02 7 G ...

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