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EPSON Stylus COLOR 760

Revision C

Troubleshooting

Overview

65

3.1.2 Isolating the Faulty Part on the Power Supply Board

This section explains how to troubleshoot the following problems:

o

The printer is turned on, but the initialization is not performed and
LED on the control panel do not come on.

o

Problems after power on

Be sure to perform troubleshooting in the order specified, because the
parts involved are mentioned in the disassembly procedure to facilitate
servicing.

Table 3-11. Isolating the Faulty Part on the Power Supply Board

Step

Check Point

Action

1

Is the Panel FFC
disconnected from the
connector on the panel
board?

The power switch for this printer is in the secondary
side. Therefore, if the FFC does not transfer
signals, the printer does not operate despite the
power supply board and the main board are
properly connected.

2

Is the Panel FFC
disconnected from the
CN11 (black, 12-pin)
on the Main Board.

This printer uses the power switch on the
secondary side. Therefore, if the FFC does not
transfer signals, the printer does not operate
despite the power supply board and the main board
are properly connected.

3

Is the 3pin of the Panel
FFC breaking wire
condition?

Check the 3pin’s line on the Panel FFC with the
circuit tester.

4

Has the fuse (F1) on
the power supply board
blown?

Check if the line in the F1 located beside the CN1
on the power supply board has blown.

5

Is CN1 on the power
supply board
disconnected?

Check that the connectors CN1, which are used to
apply AC power to the primary side on the PS
board, are properly connected.

6

Is CN10 on the Main
Board disconnected?

Check that the connector CN10, which are used to
apply the DC voltage to the Main board, are
properly connected.

7

Is the choke coil L1
broken?

Viewing the reverse side of the power supply
board, check for the proper continuity at the two
points indicated in the figure below.

8

Is the transformer (T1)
broken?

Referring to the figure below, check if the
transformer is disconnected between the poles. Try
every combination in each group marked with a
blue box.

Table 3-11. Isolating the Faulty Part on the Power Supply Board

Step

Check Point

Action

«
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Summary of Contents for Stylus Color 760

Page 1: ...EPSONStylusCOLOR760 Color ink jet printer SEIJ99004 SERVICE MANUAL ...

Page 2: ... the accuracy of the contents of this manual However should any errors be detected SEIKO EPSON would greatly appreciate being informed of them n The above not withstanding SEIKO EPSON CORPORATION 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 ide...

Page 3: ...N THIS MANUAL DO NOT CONNECT THE UNIT TO A POWER SOURCE UNTIL INSTRUCTED TO DO SO WHEN THE POWER SUPPLY CABLE MUST BE CONNECTED USE EXTREME CAUTION IN WORKING ON POWER SUPPLY AND OTHER ELECTRONIC COMPONENTS WARNING REPAIRS ON EPSON PRODUCT SHOULD BE PERFORMED ONLY BY AN EPSON CERTIFIED REPAIR TECHNICIAN MAKE CERTAIN THAT THE SOURCE VOLTAGES IS THE SAME AS THE RATED VOLTAGE LISTED ON THE SERIAL NUM...

Page 4: ...IPLES Describes the theory of electrical and mechanical operations of the product CHAPTER 3 TROUBLESHOOTING Provides the step by step procedures for troubleshooting CHAPTER 4 DISASSEMBLY AND ASSEMBLY Describes the step by step procedures for disassembling and assembling the product CHAPTER 5 ADJUSTMENTS Provides Epson approved methods for adjustment CHAPTER 6 MAINTENANCE Provides preventive mainte...

Page 5: ...7 1999 First Release B October 5 1999 Second release Change has been made due to overall review of the manual C November 25 1999 Third Release Change has been made due to overall review of the manual Some T B D have been made clear Appendix has additional information Fig7 3 7 4 has been mounted ...

Page 6: ... Card 21 Printing Area 22 Cut Sheet 22 Envelopes 23 INK CARTRIDGE 24 Black Ink Cartridge 24 Color Ink Cartridge 24 Operating Principles Overview 28 Printer Mechanism 28 Printing Mechanism 29 Printing Process 30 Carriage Mechanism 31 Platen Gap PG Adjust Mechanism 32 Paper Feeding Mechanism 32 CR Lock Mechanism 34 Paper Loading Mechanism 35 Pump Mechanism 37 Capping Mechanism 39 Electrical Circuit ...

Page 7: ...ng the PE Detector Assembly 108 djustment verview 110 Required Adjustments 110 Adjustment Tools Required 111 djustment 112 Parallelism Adjustment 112 Backlash value Adjustment for PF motor 115 Adjustment by Adjustment Program 118 About Adjustment Program 118 How to set up the program 118 Select the Model Name 119 Market Destination Check 120 Head Voltage ID Input 121 Head Angular Adjustment 123 Bi...

Page 8: ...C H A P T E R PRODUCTDESCRIPTION ...

Page 9: ...are High Color Print Quality n 1440 H X 720 V dpi printing n Four Color Printing YMCK n Traditional and New Microweave Built in Auto Sheet Feeder n Holds 100 cut sheets 64g m2 n Holds 10 envelopes n Holds 30 transparency films Two Built in Interfaces n Bi directional parallel I F IEEE 1284 level 1 device n USB Windows Macintosh exclusive ...

Page 10: ... speed of normal dot printing o Control Code n ESC P Raster command n EPSON Remote command o Character Tables n Two international character sets PC 437 US Standard Europe PC 850 Multilingual o Typeface n Bit map LQ font EPSON Courier 10 CPI 1 2 3 Paper Feeding o Feed Method n Friction feed with ASF o Paper Path n Cut sheet ASF Top entry Front out o Feed Speed n 2 36 inch sec Normal Continuous feed...

Page 11: ...on Resistance 10M ohms min between AC line and chassis DC 500V electric Strength AC 1000V rms 1 minutes or AC 1200V rms 1 second between AC line and chassis 20 240V Version ated Voltage AC220V 240V put Voltage Range AC198 264V ated Frequency Range 50 60Hz put Frequency Range 49 5 60 5Hz ated Current 0 2 A ower Consumption Approx 18W ISO10561 Letter Pattern Approx 3 5W in standby mode Energy Star c...

Page 12: ...5G n Non operating 0 50G with shipment container Figure 1 1 Temperature Humidity of Range 1 2 7 Reliability Total Print Volume 75 000 pages A4 Letter Print Head Life 3 billion dots nozzle 1 2 8 Safety Approvals 120V Version Safety Standards UL1950 CSA22 2 No 950 EMI FCC part 15 subpart B Class B CSA C108 8 Class B 220 240V Version Safety Standards EN60950 VDE EMI EN55022 CISPR Pub 22 Class B AS NZ...

Page 13: ...data buffer is full n During INIT signal is at low level or during hardware initialization n During printer error see ERROR signal n When the parallel interface is not selected RROR signal is at low level when the printer is in one of the following states n Printer hardware error fatal error n Paper out error n Paper jam error n Ink out error E signal is at high level during paper out error Figure...

Page 14: ...l Description 1 STROBE 19 In The strobe pulse Read in of data is performed at the falling edge of this pulse 2 DATA0 20 In The DATA0 through DATA7 signals represent data bits 0 to 7 respectively Each signal is at high level when data is logical 1 and low level when data is logical 0 3 DATA1 21 In 4 DATA2 22 In 5 DATA3 23 In 6 DATA4 24 In 7 DATA5 25 In 8 DATA6 26 In 9 DATA7 27 In 10 ACKNLG 28 Out T...

Page 15: ...e printer s point of view 18 Logic H Out Pulled up to 5V via 3 9K ohm resistor 35 5V Out Pulled up to 5V via 3 3K ohm resistor 17 Chassis GND Chassis GND 16 33 19 30 GND Signal GND 15 34 NC Not connected Table 1 6 Connector Pin Assignment and Signals continued Pin No Signal Name Return GND Pin In Out Functional Description ...

Page 16: ... level when data is logical 0 These signals are used to transfer the 1284 extensibility request values to the printer 3 DATA1 21 In 4 DATA2 22 In 5 DATA3 23 In 6 DATA4 24 In 7 DATA5 25 In 8 DATA6 26 In 9 DATA7 27 In 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 r...

Page 17: ... OTE 2 MDL value depends on the EEPROM setting OTE 3 CMD value depends on the IEEE1284 4 setting 1 3 3 USB Interface Standard Based on Universal Serial Bus Specifications Rev 1 0 Universal Serial Bus Device Class Definition for Printing Devices Version 1 0 Bit Rate 12Mbps Full Speed Device Data Encoding NRZI Adaptable Connector USB Series B Recommended Cable Length 2 meters Figure 1 3 USB Pin Assi...

Page 18: ...ce is let as it is Interface State and Interface Selection When the parallel interface is not selected the interface gets into the busy state When the printer is initialized or returned to the idle state the parallel interface gets into the ready state Note that the interrupt signal such as the INIT signal on the parallel interface is not effective while that interface is not selected 3 6 IEEE1284...

Page 19: ...ch and ur LED lights Figure 1 4 Control Panel 1 4 2 2 Indicators 1 Power Lights when the operating switch is ON and AC power is supplied 2 Paper Out Lights during the paper out condition and blinks during the paper jam condition 3 Ink Out Black Lights during no black ink condition and blinks during the black ink low condition 4 Ink Out Color Lights during no color ink condition and blinks during t...

Page 20: ...ning Push for 2 sec Starts cleaning of the printhead In the condition of Ink Low Ink Out or No Ink Cartridge starts the ink cartridge replacement sequence Cleaning Push for less than sec When the carriage is on the ink cartridge replacement position return the carriage to the capping position Table 1 10 Panel Function with Power On Switch Pressing with Power On Function Load Eject 1 Starts status ...

Page 21: ...gnal negative pulse of parallel interface When printer is initialized the following actions are performed a Cap the printer head b Eject a paper c Clears input data buffer d Clears print buffer e Sets default values 3 Software Initialization The ESC command also initialize the printer When printer is initialized the following actions are performed a Clears print buffer b Sets default values Table ...

Page 22: ...ed fully upsets the ink level detection and may cause a serious problem in the print head as a result Paper Out When the printer fails to load a sheet it goes into a paper out error Paper Jam When the printer fails to eject a sheet it goes into a paper jam error No Ink Cartridge When the printer detects that ink cartridge comes off it goes into this error mode Maintenance Request When the total am...

Page 23: ...aper ze A4 Width 210mm 8 3 x Length 297mm 11 7 Letter Width 216mm 8 5 x Length 279mm 11 0 Thickness 0 075mm 0 003 0 085mm 0 0033 Transparency printing is available only at normal temperature 1 5 2 3 Envelope Size No 10 Width 241mm 9 1 2 x Length 104 8mm 4 1 8 DL Width 220mm 8 7 x Length 110mm 4 3 C6 Width 162mm 6 4 x Length 114mm 4 5 Thickness 0 16mm 0 006 0 52mm 0 02 Weight 45g m2 12Ib 75g m2 20I...

Page 24: ...Margin min Top Margin min Bottom Margin min A4 3mm 0 12 3mm 0 12 3mm 0 12 14mm 0 54 3mm 0 12 Letter 3mm 0 12 9mm 0 35 3mm 0 12 14 mm 0 54 3mm 0 12 B5 3mm 0 12 3 m 0 12 3mm 0 12 14 mm 0 54 3mm 0 12 Legal 3mm 0 12 9mm 0 35 3mm 0 12 14 mm 0 54 3mm 0 12 Statement 3mm 0 12 3mm 0 12 3mm 0 12 14 mm 0 54 3mm 0 12 Executive 3mm 0 12 3mm 0 12 3mm 0 12 14 mm 0 54 3mm 0 12 Table 1 14 Raster Graphics Mode Pape...

Page 25: ...6 Printable Area for Envelopes Table 1 15 Envelope Margin Size Left Margin min Right Margin min Top Margin min Bottom Margin min 10 3 mm 0 12 28 mm 1 10 3 mm 0 12 14 mm 0 55 DL 3 mm 0 12 7 mm 0 28 3 mm 0 12 14 mm 0 55 C6 3 mm 0 12 3 mm 0 12 3 mm 0 12 14 mm 0 55 Printable Area LM RM TM BM ...

Page 26: ...e Cartridge Color Magenta Cyan Yellow Print Capacity 300 pages A4 360 dpi 5 duty each color Ink Life 2 years from date of production Storage Temperature Storage 20 oC to 40 oC within a month at 40 oC Packing 30 oC to 40 oC within a month at 40 oC Transit 30 oC to 60 oC within 120 hours at 60 oC and within a month at 40 oC Dimension 42 9 mm W x 52 7 mm D x 38 5 mm H Figure 1 8 Color Ink Cartridge N...

Page 27: ...C H A P T E R OPERATINGPRINCIPLES ...

Page 28: ...sm block diagram for the Stylus COLOR 760 Figure 2 1 Printer Mechanism Block Diagram Motor Name Type Application Feature R Motor DC with brush Used to drive the carriage making little noise A a linear scale is used to monitor the motor s operating condition F Motor DC with brush Drives paper feeding rollers used to send paper at specified speeds and load eject paper Drive the ASF used to send pape...

Page 29: ...n abbreviation of Piezo Electric Element Print signals from the Main board are sent through the driver board on the printhead unit to the PZT Then the PZT pushes the top cavity which has ink stored to discharge the ink from each nozzle on the nozzle plate Cavity Set The ink absorbed from the ink cartridge goes through the filter and then is stored temporarily in this tank called cavity until PZT i...

Page 30: ...igure 2 3 Ejecting State When the print signal is output from the C298MAIN board IC IR4C463S Nozzle Selector located on the printhead unit latches data once by 1 byte unit An appropriate PZT latched by the nozzle selector is pushed into the cavity by the common voltage applied from the main board By this operation ink stored in the cavity spurts out from nozzles Refer to Figure 2 4 Figure 2 3 Prin...

Page 31: ...arriage unit When the adjustment lever is moved up and down this printhead is maintained tilt in a flexible and adjustable structure by the tilt adjustment mechanism Also the parallelism adjustment levers mounted on the left and right sides of the carriage guide shaft are used to set the carriage guide shaft parallel to the platen when the shaft has been installed to the printer mechanism After th...

Page 32: ...not measure the paper feeding amount by referring to the pulses given For this reason the loop scale and encoder sensor are directly attached to the left end of the PF roller shaft to mechanically control paper feed amount See Section 2 2 for detailed information on the PF motor control circuit Drive from the PF motor is sent to the PF rollers and paper eject rollers as described below o To the PF...

Page 33: ...heel gear and paper ect rollers Like the Stylus COLOR 440 640 740 this printer also provides is extra printable range of 14 mm from the bottom edge excluding the bottom argin of 3mm by changing the position of the star wheel gear it has been hifted by 5 from the top of the eject roller toward the front paper guide Due to is change the tailing edge of paper is suppressed and the printer can dvance ...

Page 34: ... a cleaning operation To prevent this the printer enters a carriage lock condition in the following conditions o After Power off operation If the printer power is turned off in the middle of printing or any other performances carriage lock takes place in the end after an initialization operation o After Power on operation After the printer power is turned on and an automatic power on cleaning is c...

Page 35: ... Drive of the PF motor is sent to the ASF side 3 Drive from the PF motor is transmitted as described below PF Motor pinion gear Spur gear 76 Spur gear 26 4 Combination gear 16 40 8 Spur gear 23 2 Spur gear 27 2 in ASF gure 2 9 shows the disengage mechanism and the parts involved When the PF motor torque is switched to the ASF unit side by the disengage mechanism the function of the ASF mechanism v...

Page 36: ... the motor rotates clockwise specified steps to set the LD roller and paper turn lever in place See Standby State in Figure 2 10 2 When the paper loading signal is sent from the PC and the Load Eject button is pressed PF motor turns counterclockwise to let the LD roller load paper See Paper Pick Up State in Figure 2 10 3 When the paper is transported to the PF roller the LD roller stops where it l...

Page 37: ... direction and the Paper eject roller rotates to paper eject direction The Pump planetary lever also rotates about 90 degree angle to the Pump mechanism side 3 Torque from the PF motor is transmitted as described below PF motor pinion gear CCW rotation Spur gear 76 Combination gear 13 5 30 8 Spur gear 28 Paper eject rollers Pump planetary lever Spur Gear 10 4 Pump DE unit Spur Gear 8 4 Pump DE uni...

Page 38: ...the ational direction of the motor as shown in the table below Table 2 7 Pump unit Functions PF motor rotational direction gure 2 13 shows the operating principles of the pump mechanism Figure 2 13 Pump Mechanism Directions Corresponding Functions Counterclockwise Ink absorption by the pump Sets the wiper Clockwise Releases the pump Resets the wiper Counterclockwise Clockwis Tube pressured Tube re...

Page 39: ...COLOR 760 it has a newly designed valveless capping mechanism instead of other printers capping mechanism that integrates an air valve An air valve is usually equipped to remove bubbles created inside the cap by releasing the negative pressure However due to change in the ink sequence the new valveless capping mechanism enables this printer to maintain the initial ink charge and cleaning effects a...

Page 40: ...d Power supply board C298PSB PSE Board Panel board C298PNL efer to Figure 2 15 for the major connection of the three boards and their es Figure 2 15 Electric Circuit of Stylus COLOR 760 C 2 9 8 P S B P S E B o a r d 4 2 V D C 5 V D C C 2 9 8 M A I N B o a r d P r i n t e r M e c h a n i s m C R M o t o r P F M o t o r H e a d D r i v e r B o a r d S e v e r a l S e n s o r s P o w e r o f f 3 3 V ...

Page 41: ...8MAIN like the C267MAIN B board uses the 3 3V drive chips for most of the logic line chips CPU ASIC ROM DRAM For this reason those chips are not driven by the 5VDC but 3 3VDC that is reduced by the IC9 3 3VDC regulator on the C298MAIN board Used in the minor changed models of the Stylus COLOR 740 Stylus Pro 750 and Stylus Pro 1200 gure 2 16 in the right column shows the block diagram for the C298P...

Page 42: ...he main board or hile the printer mechanism is on duty Following explains each control and otection circuit 42V Line Constant Voltage Control Circuit The output level of the 42V line is monitored by a detection circuit composed of the seven Zener diodes This circuit prevents the voltage from dropping for a constant level of the output voltage o 5V line over voltage protection circuit This protecti...

Page 43: ... motors the slave CPU is attached on the main board in addition to the CPU and ASIC This slave CPU serving to control the DC motors only reduces duty of the CPU and ASIC for faster data processing ee Figure 2 17 for the C298MAIN board block diagram Figure 2 17 Block Diagram for the C298MAIN Board 5V 3 3V Sensors I F Circuit PNL Board Slave CPU CPU ASIC P ROM D RAM C 9 0 A 1 1 C A C P U I C 2 0 A d...

Page 44: ...s the printhead temperature Several interrupting functions Outputs the system clock signal SIC IC8 Controls interfaces Controls the printhead drive waveform circuit Transfers serial data to the printhead Receives panel control signals and sensor signals EEPROM Controls detection of the signals output from the encoder lave CPU or DC motors IC15 Sets the current value for the PF motor and CR motor C...

Page 45: ...are determined by the A0 A4 signals and of among data used to determine the waveform angles is selected Then setting the selected data producing trapezoid waveform value and canceling the data are performed by the rising edges of the CLK1 and CLK2 signals Head nozzle selector circuit Printing data is converted into serial data by the ASIC IC8 E05B70CD Then the converted data is allocated to the si...

Page 46: ... reset circuit The VDD port of the IC5 reset IC monitors the 5V line When the IC detects an abnormal voltage level 4 3 V or lower it outputs a reset signal from the RST port to CPU and ASIC 42V line reset circuit The VIN port of the IC5 reset IC monitors the 45V line When the IC detects an abnormal voltage level 35 5V or lower it outputs a reset signal from the VDT port to CPU and ASIC OTE IC5 als...

Page 47: ...ge operation range to detect the carriage position The linear encoder sensor outputs two kinds of TTL level pulses Phase A and Phase B to IC8 ASIC Figure 2 21 CR Linear Scale Encoder Pulse Direction for the current CR s movement is detected based on the waveforms of the Phase A and Phase B that are out of phase while carriage position is controlled by using the waveforms output from Phase A on a c...

Page 48: ...ft and the IC15 slave CPU assumes that it detects the CR lock lever position when the following conditions are satisfied nIC15 slave CPU detects the motor control current value 500 mA nDifference X between P1 and P2 number of pulses output while the CR moves from the right frame is 30 or less 4 The CR motor rotates counterclockwise and the CR moves from left to right again and if IC15 slave CPU de...

Page 49: ...etect a paper feeding amount The loop scale encoder sensor outputs 2two kinds of TTL level pulses Phase A and Phase B to IC8 ASIC Figure 2 24 Loop Scale Encoder Pulse Rotational direction of the PF motor is determined by the phase between the output waveforms of Phase A and Phase B Refer to Figure 2 24 for different phase for each direction NOTE If the drive voltage for the PF motor reaches 1A a f...

Page 50: ...etailed information on the values stored EEPROM EPROM is connected to ASIC with 4 lines and each line has the following nction n CS Chip selection signal n CK Data synchronism clock pulse n DI Data writing line serial data at power off n DO Data reading line serial data at power on e EEPROM control circuit is as shown below Figure 2 25 EEPROM Circuit Diagram e detailed map of the EEPROM is provide...

Page 51: ...o the ASIC If there is no paper on the other hand the lever cuts in between the photo sensor terminals which outputs a HIGH signal to the ASIC o ASF HP sensor The ASF HP sensor located at the left edge of the ASF detects the ASF home position This sensor consists of the ASF HP detector wheel and a photo sensor A small portion of the ASF HP sensor has a cut out and when the cutout comes into positi...

Page 52: ...ched along the CR scanning direction This encoder sensor outputs two kinds of output pluses Phase A and Phase B and the minimum resolution of the sensor is 1 720 inches The sensor outputs HIGH signals for the black bands of the scale and LOW signals for the transparent parts to the ASIC The printer controls the CR motor based on the signals output from this sensor The sensor also detects the CR ho...

Page 53: ...C H A P T E R TROUBLESHOOTING ...

Page 54: ... w i t h L E D e r r o r i n d i c a t i o n s S e c t i o n 3 1 1 S e c t i o n 3 1 3 I s t h e p r i n t e r p o w e r o n I s o l a t i n g t h e f a u l t y p a r t o n t h e p o w e r s u p p l y b o a r d S e c t i o n 3 1 2 I s o l a t i n g t h e f a u l t y p a r t a c c o r d i n g t o t h e e x h i b i t e d p h e n o m e n o n s Motor Name Location Check Point CR Motor CN14 Main board ...

Page 55: ... Error Indication of Operation Panel Printer Status Indicators Priority Power Ink Out Black Ink Out Color Paper Out Power On Condition On 9 Ink Sequence Blink 6 Ink Cartridge Replacement Mode Blink 5 Data Processing Blink 8 Paper Out On Off Off On 4 Paper Jam Condition On Off Off Blink 3 No Ink Cartridge Ink End Black On 7 Ink Level Low Black Blink 7 No Ink Cartridge or Ink End Color On 7 Ink Leve...

Page 56: ...oard directly attached to the printhead surface side is disconnected Note the connector green 4 pin is irrelevant as it is for the encoder 5 The micro switch is defective 6 The value for the ink consumption counter in the EEPROM is destroyed 4 Maintenance Error Refer to Section 3 1 1 4 Usual waste ink over flow is requested Note this error can be cleared by the special function through the control...

Page 57: ...ce is removed To remove severe smear staple a cloth moistened with alcohol to a post card and clean the roller in the same manner 2 When the Paper Feed SW is pressed the ASF LD roller feed the paper to the PF roller But ASF LD roller rotate again and the PF roller advances the paper over the TOF position After that the Panel LED indicates the Paper Out Error Check if the connector yellow 3 pin for...

Page 58: ...eems that the Hopper is moving correctly But the paper is not loaded and the Paper Out Error is indicated on the Operation Panel Hand rotate the shaft in the ASF in the paper feed direction and check if the hopper hops out every time you rotate the shaft NOTE Even though the ASF HP sensor is in the proper condition for detecting the home position If the hopper is not operating at the correct timin...

Page 59: ...e Paper Jam Make sure if the paper length is beyond the specifications is used 2 When the printer is turned on the PF roller rotates continuously about 10 sec and Panel LED indicates the Paper Jam Make sure that any paper dust or material push up the tip of the PE sensor Actuator Viewing the PE sensor from the front check that the actuator is the correct position the actuator falls in the cutout w...

Page 60: ...ds up points according to ink weight used to form one dot This counter is reset the value returns to zero when the I C replacement sequence is performed and I C is replaced If the I C is replaced with the used I C in the I C replacement sequence the following adversities will occur Ink has run out but the printer continues to print and starts false firing which damages the printhead If the new I C...

Page 61: ...ht micro switch pressed down place the probes of the tester to the middle and right pins to check for electrical continuity Table 3 8 Remedies for No I C and Ink Out Errors continued Step Detail Phenomenon Check Actions H o o k s C o n n e c t o r M i c r o S w i t c h e s S t e p 1 S t e p 2 P u s h 1 P u s h 2 6 Is data in the EEPROM destroyed If the address for the ink consumption information i...

Page 62: ...cept any data from the PC The EEPROM initialization mode initializes the following items Accumulated power off time The value for the Timer IC is reset CL Timer The CL timer which is also called fire waiting timer secures the printer specific period of time so bubbles formed around the printhead during a cleaning vanish I F selection Selects Auto the factory default from 3 I F selection items Auto...

Page 63: ... position mount the it in the CR mounted position securely In case the CR Encorder FFC is disconnected from the connector on the CR Encorder sensor board connect it securely 2 Ditto Referring to step 2 in Section 4 2 4 7 Figure 4 49 check that the Liner scale is set between the sensor parts Also check that the sensor is free from dust and paper debris CR Encorder Sensor 3 When the Printer is turne...

Page 64: ...he Fatal Error Since the CR motor is DC motor measure the coil resistance using the tester as following figure Resistance 31 1 Ω 25 Table 3 10 Remedies for Fatal Error continued Step Detail Phenomenon Check Actions CR Motor 7 When the Printer is turned on the PF motor dose not move After that the Panel LED indicates the Fatal Error Since the PF motor is DC motor measure the coil resistance using t...

Page 65: ...side Therefore if the FFC does not transfer signals the printer does not operate despite the power supply board and the main board are properly connected 3 Is the 3pin of the Panel FFC breaking wire condition Check the 3pin s line on the Panel FFC with the circuit tester 4 Has the fuse F1 on the power supply board blown Check if the line in the F1 located beside the CN1 on the power supply board h...

Page 66: ...bed below Step 1 On Step 2 Off Step 3 Off Step 4 On Table 3 11 Isolating the Faulty Part on the Power Supply Board Step Check Point Action S t e p 1 G D S S t e p 2 G D S S t e p 3 G D S t e p 4 G D S t e p 1 S t e p 2 N P N T r S t e p 3 S t e p 4 B C E B C E B C E B C E 11 Is the PNP connection transistor defective Check the PNP connection transistor on the C298 PSB SE board in the same manner d...

Page 67: ...n 3 1 1 Section 3 1 2 or need more information to isolate the cause cording to the exhibited phenomenon The contents mostly cover the oblems relating to the C298 and their remedies Table 3 12 Phenomens Exhibited No Phenomenon Exhibited Table to refer to 1 CR motor does not rotate Table 3 13 2 PF motor does not rotate Table 3 14 3 Cleaning does not solve the print problem Table 3 15 ...

Page 68: ...pped hole in the bottom plate on the board with a screw C298Main Board 5 0 V 5 0 V S A M P L E C 2 0 u S V 1 0 1 V B l a c k L i n e C R A R e d L i n e C R B Step Check Point Action 1 Getting ready for inspecting waveforms The CN13 connector used to control the PF motor is indicated in the figure below Using the oscillo scope check for the waveform for each phase output from the indicated connect...

Page 69: ...Board Even though they are not installed aslant as shown below disconnect the FFC once and connect them again then run a print check C298 Main Board 4 Check the cap for any foreign matter dirt or damage Remove the printer mechanism and release the carriage lock to move the carriage unit away from the home position Then have a close look at the cap rubber and check for any problem below 5 Has the T...

Page 70: ... Board Head FFC 8 Is the head driver transistor defective If you see the C298 Main from the heat sink side the following two power transistors can be found Q3 and Q4 Outputs the common voltage To check if each pair transistor is working properly check the trapezoid waveform at the emittor terminal of the charging side Check the waveform while running a print Check the continuity of each transistor...

Page 71: ...ead transistor in Step 8 the base terminal input the similar trapezoid waveform from the pre driver IC but any wave form is not input at Emita terminal Replace the Power Transistor If the waveform are not output correctly on Base terminal of each Power Transistor replace the IC10 or 11 on C298 Main Board Otherwise replace the C298 Main Board able 3 15 Cleaning does not Solve the Print Problem cont...

Page 72: ...C H A P T E R DISASSEMBLYANDASSEMBLY ...

Page 73: ...hysician n A lithium battery is installed on the main board of this printer Be sure to observe the following instructions when serving the battery n Keep the battery away from any metal or other batteries so that electrodes of the opposite polarity do not come in contact with each other n Do not heat the battery or put it near fire n Do not solder on any part of the battery Doing so may result in ...

Page 74: ...adjustments when you disassemble the printer See Chapter 5 for details n When assembling if an ink cartridge is removed and needs to be installed again be sure to install a new ink cartridge because of the following reasons n Once the ink cartridge mounted on the printer is removed air comes in and creates bubbles in the cartridge These bubbles clog ink path and cause printing malfunction n If an ...

Page 75: ...ocations erring to the table below Note that the screw numbers described in the anual correspond to the numbers in the table Table 4 2 Screw Specifications No Body Name Size 1 Bind S tite M3X6 2 Bind P tite CBP tight M3X6 3 Bind P tite CBP tight M3X8 4 Bind P tite CBP tight M2 5X5 5 Pan head C P M3X6 6 C Pan head B tite Sems W1 M3X8 7 Bind S tight Sems R2 CBS Sems M3X6 8 Bind S tight M3X10 9 Pan h...

Page 76: ...ked oNot necessary Paper feeding mechanism Is paper fed smoothly oChecked oNot necessary Does paper get jammed oChecked oNot necessary Does paper get skew during paper feeding oChecked oNot necessary Are papers multi fed oChecked oNot necessary Does the PF motor get overheated oChecked oNot necessary Abnormal noise during paper feeding oChecked oNot necessary Is the paper path clear of all obstruc...

Page 77: ...PSON Stylus COLOR 760 Revision C isassembly and Assembly Disassembly Procedures 77 2 Disassembly Procedures e flowchart below shows procedures for disassembly Figure 4 1 Flowchart of Disassembly ...

Page 78: ...ds side Remove 4 screws No 8 securing the Upper Housing and remove by lifting it upward Refer to Figure 4 2 Figure 4 2 Removing the Upper Housing U T I O N Lift up and remove the Upper Housing pulling it forward Since it collides with the carriage H E C K O I N T After assembling the Upper Housing confirm the Head FFC is placed in the gutter which is located in the back side of the Upper Housing I...

Page 79: ...ure 4 3 Then take all following cables out of connectors on the main board n CN1 AC Source on PS board CN5 PE sensor CN6 ASF HP sensor CN8 Head FFC1 CN9 Head FFC2 CN10 PS Cable CN11 Control Panel CN12 PF Encoder Sensor After removing all cables from the Main Board detach the Shield Plate M B Assembly completely from the printer mechanism 4 When removing each Circuit Board unit from the M B Shield ...

Page 80: ...wing adjustments when the Main board is replaced 1 Head voltage ID Input Refer to Chapter 5 2 Bi D adjustment including Head Gap adjustment Refer to Chapter 5 3 USB ID data input Refer to Chapter 5 Be sure to exchange the following parts also when the Main Board is replaced 1 Waste Ink Absorption Pad 2 Ink Cartridge BK Color This parts exchange is required since the several ink counters stored in ...

Page 81: ... detach the Sub Right Panel Housing from the Operation Panel Assembly Remove the Panel Shield Plate and C298 PNL board from the Operation Panel Assembly Disconnect the Panel FFC from the connector on the C298 303 PNL board Figure 4 6 Removing the Operation Panel U T I O N Removing the Operation Panel Assembly also separates the stacker assembly from the Printer Mechanism since the Stacker Assembly...

Page 82: ...y Procedures 82 4 Disassembling the Printer Mechanism e Stylus Color 760 does not have the Lower Housing the printer hanism part should already have appeared by now Therefore this section ains procedures for disassembling the major parts or units of the printer hanism ...

Page 83: ...ring 49 from the left side of the CR Assembly and one screw No 2 securing the Fastener Head Plate Then take out the Fastener Head Plate Refer to the Figure 4 7 Remove the Head FFC Holder from the CR unit by releasing four hooks Two hooks Left Right sides of CR unit Two hooks Back sides of CR unit Refer to Figure 4 7 Figure 4 7 Removing the Printhead 7 Remove the two Head FFC being connected to the...

Page 84: ... ink cartridge once taken out can not be used again be sure to install a new ink cartridge when you return the printer to the user n Before packing the printer for transportation make sure new ink cartridges are installed and the carriage is locked with the CR lock lever securely U S T M E N T Q U I R E D When you replace the printhead unit perform the following adjustments Refer to Chapter 5 for ...

Page 85: ...Support Front to the Waste Ink Absorber Tray Assembly Release three hooks fixing the Lower Paper Support Front and remove the Lower Paper Support Front Refer to Figure 4 10 Remove one screw No 3 securing Waste Ink Absorber Tray Assembly located in the right side of the printer mechanism Refer to Figure 4 10 On the Left side of the printer mechanism using tweezers or a small screw driver carefully ...

Page 86: ...er to the Figure 4 11 2 Be careful not to damage Loop Scale when the Tray Spacer is removed U S T M E N T Q U I R E D 1 When the Waste Ink Absorber was replaced perform the following Panel Reset Function for ink overflow counter Turn on the Printer while holding the Load Eject SW Cleaning SW and hold Cleaning SW 10 seconds For details Refer to the Chapter 5 Section 5 2 3 11 Otherwise perform the w...

Page 87: ...ration Panel Refer to Section 4 2 3 Remove two screws No 1 securing the Right Sub Frame Refer to Figure 4 12 Figure 4 12 Removing the Right Sub Frame Remove the Waste Ink Absorber Tray Assembly Refer to Section 4 2 4 2 Raise the Printer Mechanism toward ASF side so that you can see the bottom of the Printer Mechanism Refer to Figure 4 13 Figure 4 13 Raising the Printer Mechanism NO 1 Screws Right ...

Page 88: ...Assembly U T I O N n When you replacing the cleaner head built in the Pump assembly be careful of the following points n Do not touch the cleaner head with your bare hands Use gloves or tweezers n Do not smear the head cleaner with oil or grease n When installing the cleaner head set the rubber side black side toward the right side of the frame n When you replacing the Cap Assembly do not touch th...

Page 89: ...ng the printer be careful not to crush nor leave any stress on the ink tube connecting the pump assembly and the cap assembly n Check the ink tube is connected securely to the connect portion of the Cap Assembly Refer to Figure 4 16 n Check the ink tube is placed correctly in the Ink System Assembly Refer to Figure 4 16 n After installing the Pump Assembly make sure that the cleaner parts move bac...

Page 90: ... screw driver and remove the Timing Belt carefully from the pinion gear on the CR motor Refer to Figure 4 17 Figure 4 17 Removing the Timing Belt Remove two screws No 1 while holding the CR motor and remove the CR motor assembly Refer to Figure 4 18 Figure 4 18 Removing the CR Motor Assembly Driven Pulley Holder CR Timing Belt C A U T I O N n When you remove the Timing Belt from the pinion gear on...

Page 91: ... fixing the Gear 27 2 to the ASF LD Shaft on the left of the ASF Assembly Viewed front and slide it left little carefully Refer to Figure 4 20 OTE Do not damage the Loop Scale when sliding the Gear 27 2 to the left In case the Gear 27 2 is removed in above step 4 the Loop Scale may be damaged with the Gear 27 2 Figure 4 20 Releasing hook for the Gear 27 5 Slide the ASF unit to the right side viewe...

Page 92: ... into the fixing hole on the Middle Frame n Screws for ASF Assembly should be used at the following positions Looking from the back of printer Refer to Figure 4 19 Right Side viewed back side ASF Fixing Screw Left side viewed back side Screw No 7 n Make sure the ASF HP sensor cable and the PF Motor Cable are set in the hook on the right side viewed back side of ASF unit Refer to Figure 4 23 Middle...

Page 93: ...er and remove the Left LD Roller Fixing Bushing white plastic attached to the left edge of LD Roller Shaft Refer to Figure 4 25 Slide the LD roller shaft to the left side and remove the ASF HP Detector Wheel after releasing its hook Refer to Figure 4 25 Figure 4 25 Removing the LD Roller Fixing Bushing ASF HP Wheel 5 Release the Hopper Assembly fixing hooks from the protrusion on the ASF Frame at ...

Page 94: ...1 961 between the Paper Feed Roller Assembly and the Hopper Assembly with Tweezers carefully Lift up the right side of Paper Feed Roller Assembly a little with the LD Roller Shaft and move the LD Roller Shaft to the right Then remove it from the left side hole the ASF Frame Remove the Left Hopper Release Lever from the left side of the LD Roller Shaft Remove the Paper Feed Roller Assembly from the...

Page 95: ... direction of the Hopper Release Lever when installing it Refer to Figure 4 29 n When installing the right and left Paper Feed Roller Assemblies to the LD Roller Shaft the black Paper Feed Roller Assembly should be set on the right side n Make sure that gutters of back side of both Paper Feed Roller Assembly are set on the rail on the ASF Frame Refer to Figure 4 30 n Make sure that the Left frame ...

Page 96: ...it from the back side of the ASF Frame Refer to Figure 4 32 n During assembly when setting the compression spring 1 961 to the spring installation position in the Paper Feed Assembly hang the spring on the hook temporarily Also do not forget to release the hooks of these springs from the holes located on the back of paper feed assembly by rotating the spring Refer to Figure 4 33 Fixing hook portio...

Page 97: ...oks fixing the LD Roller Cover to the Paper Feed Roller Assembly Refer to Figure 4 34 Release the two hooks fixing the LD Roller Assembly at around the shaft hole of the Paper Feed Roller Assembly Refer to Figure 4 34 Figure 4 34 Releasing hooks for LD Roller Hooks for the LD Roller Assy Hooks for the LD Roller Cover C H E C K P O I N T n When installing the LD roller assembly make sure that the h...

Page 98: ...ing Belt by pushing the Driven Pulley Holder and remove the Timing Belt from the pinion gear of the CR motor Refer to Figure 4 18 Take the Compression Spring 23 52 out of the Driven Pulley Holder with tweezers Refer to Figure 4 36 Figure 4 36 Taking out Compression Spring 23 52 5 Slide the Driven Pulley Holder to the right side and remove it to forward 6 Remove the Driven Pulley from the Driven Pu...

Page 99: ...ight edge of the CR Guide Shaft Refer to Figure 4 38 Figure 4 39 Removing the Torsion Spring 63 7 PG Lever 10 Remove one screw No 7 and rotate the Right Parallelism Adjustment Bushing and move it forward so that the locking protrusion of the Right Parallelism Adjustment Bushing fits in the notches on the right side of the Top Frame Refer to Figure 4 40 Figure 4 40 Removing the Right Parallelism Ad...

Page 100: ...on where the Bushing is fixed on the TOP Frame perform the PG Adjustment Refer to the Chapter 5 H E C K O I N T n When disassembling the Right Parallelism Adjustment Bushing mark present location where the Bushing is fixed on the TOP Frame so that you can omit PG adjustment after assembly n When installing the Disk Spring 6 2x 0 15x1 S NA pay attention to its direction Convex side should face the ...

Page 101: ...es which is placed in the gutter of the left side of the CR assembly Refer to Figure 4 42 Figure 4 42 Removing the I C Detector Holder Bushing Remove the I C Detector Holder by releasing the four hooks Refer to Figure 4 43 Figure 4 43 Removing the I C Detector Holder 4 Remove the I C Detector from the CR assembly Figure 4 44 Removing the I C Detector No 9 Screw I C Detector Holder Bushing Hooks fo...

Page 102: ... Detector Lever Figure 4 47 Placing the I C Detector Cables H E C K O I N T n Make sure that the Torsion Spring 1 08 is hung on the protrusion of the I C Detector Lever and the hook on the CR frame correctly Refer to the Figure 4 46 n Make sure that the I C Detector Cables are placed in the gutters Figure 4 47 n Make sure that the I C Detector Lever is moved correctly CR Encoder Board Assy CR Asse...

Page 103: ...Paper Guide Assemblies and one Right Upper Paper Guide Assembly to the following directions releasing their Torsion Springs 117 6 from the hooks on the Top Frame Refer to Figure 4 49 Upper Paper GuideAssembly Remove it backward Right Upper Paper Guide Assembly Remove it forward Figure 4 49 Removing the Upper Paper Guide Assembly 8 Remove Left Paper Guide sliding to left side releasing the one hook...

Page 104: ...per Guide Front by releasing the two hooks from the Paper Eject Roller Shaft Refer to Figure 4 52 Remove the Earth Spring from the left edge of the Paper Eject Roller Assembly Remove the Paper Eject Roller Assembly releasing the fixed locks located on the right and Left edges of the Paper Eject Roller Shaft Refer to Figure 4 53 Figure 4 52 Removing the Paper Guide Front Figure 4 53 Removing the Pa...

Page 105: ...the PF Roller Assembly and rotate it forward so that the protrusion on the Bushing 12 is aligned to the hole of the Left Frame Refer to Figure 4 55 Figure 4 55 Setting the protrusion on Bushing 12 17 Slide the PF Roller Assembly to the left side carefully and pull it out from the Printer Mechanism Refer to Figure 4 56 Figure 4 56 Removing the PF Roller Assembly No 1 Screw securing the PF Encoder D...

Page 106: ...ssy is set on the Top Frame with the Torsion Spring 117 6 make sure that PE sensor lever is set in the square hole on the Right Upper Paper Guide Insert the Right Upper Paper Guide from the front setting the PE Sensor Lever in the square hole in the Right Upper Paper Guide Refer to Figure 4 57 n Make sure that the Torsion Spring 117 6 is set in the gutter on the Upper Paper Guide Assembly n Make s...

Page 107: ...3 5 30 carefully Refer to Figure 4 59 Figure 4 59 Removing the Flat Washer Gear 13 5 30 Remove No 5 screws PF motor fixing screw securing the PF Motor while holding it and remove it from the Left Side Frame Refer to Figure 4 60 Figure 4 60 Removing the PF Motor Gear 28 Plain Washer 4 1 x 0 5 x 4 5 Combination Gear 13 5 30 C A U T I O N Do not damage the tooth of the Combination Gear 13 5 30 A D J ...

Page 108: ...the PE Detector Circuit Board Refer to Figure 4 61 Figure 4 61 Removing the PE Detector connector Move the CR unit around the center portion of CR Shaft releasing the CR lock lever with tweezers or small screw driver Release four fixed hooks securing the PE Detector Assembly from the front and sliding it upward Refer to Figure 4 62 Figure 4 62 Removing the PE Detector Assembly Printer Mechanism vi...

Page 109: ...C H A P T E R ADJUSTMENT ...

Page 110: ... adjusting lever 7 Bi D Adjustment When you replace or remove the printhead When you replace the main board When you replace the CR Motor 8 USB ID data Input When you replace the main board 9 Protection counter reset When you replace the waste ink pad Table 5 2 Actions Taken and Adjustment Required No Content of Operation Adjustment Procedure 1 Removal of the printhead 1 Perform initial ink charge...

Page 111: ...ent Item Contents Spec 1 Thickness Gauge Parallelism Adjustment thickness 1 14 mm 2 Micro scoop Backlash Adjustment Magnified ratio x 15 Scale 0 1mm 3 Adjustment Program Each Mechanism Settings Stylus COLOR 760 860 1160 Program Disk 3 5 inch 2 FDD U T I O N n Never use the bent curved or tilted or rusty thickness gauge n Erase any dirt grease or obstacles on the thickness gauge before you use it ...

Page 112: ...tment bushing for right and left frame and set them on the peaking of the upper frame side so that they match with the standard mark of parallelism adjustment bushing Figure 5 1 Parallelism Adjustment Bushing 2 Set the PG lever front Gap is small U T I O N n Do not scratch the special coated surface of the PF roller assembly and rib surface of the front paper guide B n Before performing this Adjus...

Page 113: ...iage right and left and make sure that the thickness gauge does not move for the both settings Left Parallelism Adjustment 8 Perform Steps 2 to 7 for the left Parallelism adjustment bushing Checking parallelism 9 Perform steps 1 to 4 again 10 Make sure that the thickness gauge does not move right and left along with the carriage when the carriage is moved about 20 mm 11 Move the right Parallelism ...

Page 114: ...de rotate the Combination Gear 13 5 30 to front side and set the head cleaner Figure 5 3 Setting the Head Cleaner Move the carriage next to the head cleaner and make sure that overlap between the tip of the printhead and cleaner head is more than 0 5 mm Figure 5 4 Overlap of Head Surface and the Cleaner Blade 3 Then rotate the Combination Gear 13 5 30 and return the head cleaner under the Paper Ej...

Page 115: ...Section 4 2 4 2 o Left Housing Panel o Left Sub Frame Figure 5 5 Combination Gear 13 5 30 PF Encorder Sensor U T I O N In case this adjustment is not performed correctly following phenomenon will occur The backlash value is too narrow The PF motor dose not rotate correctly based on the defined current value in the firmware As the result paper feed accuracy is lowered It sounds that the Gear 76 and...

Page 116: ... following condition is confirmed the backlash value will not be suitable The A portion of the Gear 76 dose not return to the normal position The backlash value is too narrow The A portion of the Gear 76 returns to the normal position without any jarring sounds The backlash value is too wide Figure 5 7 Pushing the Gear 76 to the Left side frame side U T I O N Do not secure the PF fixing screw and ...

Page 117: ...f the backlash value is too narrow move the PF motor to front side of the printer a little by pulling the PF motor If the backlash value is too wide move the PF motor to the rear side of the printer a little by pushing the PF motor Repeat the above step 3 to 5 until the backlash value is adjusted around the suitable value In case the above adjustment procedural is completed check the backlash valu...

Page 118: ...repair Basic adjustment items by using this ogram are as shown below Table 5 1 Basic adjustment items 5 2 3 2 How to set up the program In order to set up the program insert 1st FDD 3 5 inch disk Installer Disk to the 3 5 inch FDD disk drive and start the install the program file in the Windows environment After complete the set up the SC760 860 1160 Adjustment Program icon is added to the Program...

Page 119: ... the factory command to the printer in order to set the IEEE1284 4 mode to OFF status This is because this program dose not run in the IEEE1284 4 mode Figure 5 10 Main menu of the this Program NOTE When the OK button is pressed in this menu this adjustment program dose not verify the model name stored in the PROM NOTE IEEE 1284 4 mode is reset to ON status by performing the Hardware reset NOTE Whe...

Page 120: ...the EPROM Any CG chip is not mounted on the Main board and only 2 aracter tables PC437 PC850 are stored in the PROM Note the ctory default CG setting in EEPROM is PC437 So in case you select s function the following menu is displayed Figure 5 11 Checking the present market destination OTE In order to cancel the above menu select another menu or adjustment item ...

Page 121: ...ode on the label n Printer mechanism On the label of the packing box of the printer mechanism Run the Adjustment program and enter the Adjustment Main menu Select the Head voltage ID input and click it and you will see the in the next page appears This function is useful only when the Main board is replaced to new one When the Printhead is replaced with new one go to Step 6 Figure 5 12 1st Head Vo...

Page 122: ...hange data item in the Head ID input menu and click the OK button Following Head ID input menu is displayed Figure 5 14 Entering the 12 digits Head ID Input the12digits code of the Head Voltage ID in the above menu In case you input an incorrect character or symbol in this menu this program detects it automatically and displays error message in the bottom column Figure 5 17 shows you the one of th...

Page 123: ...his adjustment is required in the following cases n When the printhead is replaced n When the carriage unit is replaced n When the angle adjustment lever is moved int the check pattern in the adjustment program to determine the ngle degree needed for the printhead Then move the adjustment lever the carriage unit to set the printhead angle referring to the printed eck pattern 1 Select the Head angu...

Page 124: ... OK button as following figure The printer moves to the I C replacement position and stops at the position Figure 5 20 Select the Move the carriage to the head angular adjustment 5 Loosen the printhead securing screw securing the printhead on the carriage You don t need to remove it completely Figure 5 21 Head fixing screw position NOTE Loosen the printhead securing screw securing the printhead on...

Page 125: ...adjustment pattern again and click the OK button The printer prints out a head angular adjustment pattern again 8 Verify the pattern on the printout again 9 Repeat the procedures from Step 2 to Step8 until the combination pattern of black magenta is correct 10 After completing the adjustment select the Move the carriage to the head angular adjustment in the Head angular adjustment menu Refer to th...

Page 126: ...ctional Adjustment pattern and click the OK button Figure 5 25 Bi d adjustment pattern NOTE As shown in the sample gaps between passes are sometimes created in different directions among patterns This unexpected change in direction is caused by an ink jet printer specific reason which is an ink jet printer inevitably performs a periodical cleaning specified by the flashing timer even during Bi D p...

Page 127: ...yed Figure 5 28 Bi d adjustment input menu 7 Check the printed pattern again and Input the suitable value in the above menu and click the OK button The input value is written in the specific address of the EEPROM Refer to Figure 5 29 The value 0 blue appears in the center of the screen and changes the value by clicking the up down icon Apply the value for the most properly aligned pattern in the B...

Page 128: ...click the Previous button and go back to the Bi Directional Adjustment menu Select the Print the Bi D adjustment patter and click the OK button 0 Check if the all 3 vertical line is alined correctly in the adjusted dot size pattern If you can watch the misaligned pattern repeat the step 3 to Step10 until the Bi d adjustment pattern is alined ...

Page 129: ...it The timer data of the PC is used for this input data n Number 0 A 0 is automatically added as the last digit in the input program repair activity we use a 10 digit serial number as a USB ID The rest digits is generated by the adjustment program and added to the rial number automatically 1 Select USB ID input in the Adjustment main menu Figure 5 30 Select the USB ID input menu 2 In USB ID check ...

Page 130: ...ottom column of the USB ID Check Input menu In this message you can check if the USB ID is written in the EEPROM correctly Figure 5 32 Write down the USB ID Click the Previous button to go back to the USB ID Check Input menu 7 Select Confirmation of USB port function and click the OK button in USB ID Check Input menu Figure 5 33 Select the Confirmation of USB port function NOTE Above Confirmation ...

Page 131: ... 3 The following menu appears Figure 5 37 Conformation Of USB Port Function Menu If you select OK A4 check pattern will print and the message below follows If you select Previous the message below appears Figure 5 38 Message 3 C A U T I O N In the following step be sure to connect a parallel cable before clicking the OK button Otherwise the program will hang up In this menu only OK and Previous bu...

Page 132: ...cable and then click OK The USB ID input menu appears again step 7 OTE If the USB port operates correctly 2 sheets of A4 Check pattern are printed ow B Windows98 not installed 1 The message below appears Figure 5 39 Message 4 2 Click Yes The USB ID input menu appears again step 7 ...

Page 133: ...ct the Initial Ink charge item from Maintenance Menu and click the OK button NOTE As described in the menu message about 1 6 amount of the Black ink cartridge and 1 9 amount of the Color ink cartridge are consumed in the initial ink charge operation Figure 5 41 Select the Initial Ink Charge NOTE The initial ink charge is carried out without turning off on the printer It takes about 2 minutes for t...

Page 134: ...ning ink consumption 1 55ml rubbing operation forcibly Select Head cleaning from the Maintenance menu as shown below Figure 5 42 Select the Maintenance Click the OK button in the menu The Powerful cleaning begins It takes 30 seconds for the process to complete U T I O N If you can not recover the clogged nozzles despite you performed powerful operation enter the Initial ink charge sequence by refe...

Page 135: ...t Protect counter check from the Maintenance menu Figure 5 43 Select the Check the present counter value 2 By clicking the OK button following menu is displayed Figure 5 44 Check the present counter value 3 After observing the Caution description on the above menu click the OK button The present counter value is indicated in the bottom column as shown in the following figure Figure 5 45 Present co...

Page 136: ...he following menu appears Figure 5 47 Clear the Protection counter value 3 After observing the CAUTION description in the menu click the OK button When the OK button is clicked the message appears in the bottom column of the menu Figure 5 48 Clear the protection counter value 2 C A U T I O N n Be sure to replace the installed waste ink pad with a new one after or before you clear the current prote...

Page 137: ...ect the Recovery for clogged nozzle menu The following menu appears Figure 5 49 Select the Recovery for clogged nozzle After setting a plain paper click the OK button The printer enters a head cleaning sequence and prints the nozzle check pattern as shown in the following figure Figure 5 50 Nozzle Check pattern 3 After completing one sequence the program displays the counter that this program is p...

Page 138: ...Figure 5 52 Select the Print A4 pattern 2 When printing is complete the following message appears in the bottom column of the menu Figure 5 53 Complete the printing 3 Check all printed patterns on the 2 sheets of the printed paper If you find any incorrect portion select the adjustment menu and try to adjust it C H E C K P O I N T n Check points for the first solid pattern beta pattern 360 x 360 d...

Page 139: ... scale unit This section describes how to assemble the following parts o PF Loop scale o Base plate o Adhesive Tape 1 Set the AS Tool 1051765 as shown in the following figure 2 Peel off the protection tape from the Base plate and set it on the AS Tool 1051765 The adhesive side should be facing upward Figure 5 54 Setting the Base plate on the AS Tool 1051765 No Assembling Item Assembling Parts Requ...

Page 140: ...ck it inside the printed circled line on the PF Loop scale Figure 5 56 Sticking the Protection Tape to the PF Loop Scale U T I O N Do not touch the following portion Inside the PF Loop scale shaft hole Character printed side of the Loop scale H E C K O I N T It is not a problem if the outline of the Base plate dose not just fit to the printed circled line of the PF Loop scale Refer to Figure 5 56 ...

Page 141: ...51767 as following figure Figure 5 57 Stick the PF Loop scale unit on Gear 76 Figure 5 58 Checking the PF Loop scale sticking condition Gear 76 Gear 76 ircled ut off holes two protrusions on the Gear 76 AS Tool 1051767 C A U T I O N n Do not touch the following portion Inside of PF Loop scale shaft hole Character printed side of the Loop scale n Do not damage the inside of the PF shaft hole of the...

Page 142: ...C H A P T E R MAINTENANCE ...

Page 143: ...nting the amount of the waste ink Once the amount of the waste ink reaches the predetermined limit the printer indicates Maintenance Error and the waste ink pad should be replaced n Overflow Counter Limit Overflow Counter Protection Counter A 39200 n Timing for Replacing the Waste Ink Pad When the total amount of the waste ink reaches the predetermined limit the LED indicates Maintenance Error Ref...

Page 144: ... Lubrication Point No Standard Remarks Reference Page 1 Lubrication Point Inside of BUSHING 12 RIGHT Use a brush to apply grease See Page 147 Lubricant Type G 26 Lubrication Amount Take a 3mm diameter ball and apply it evenly to the inside of the bushing 2 Lubrication Point HOLDER PULLEY DRIVEN See Page 147 Lubricant Type G 26 Lubrication Amount φ 1 x 3mm 4 places 3 Lubrication Point Inside of BUS...

Page 145: ...mount One 2 mm diameter ball Table 6 2 Lubrication Point continued No Standard Remarks Reference Page 11 Lubrication Point SPUR GEAR 23 2 Gear Train Do not smear the SCALE PF with grease See Page 149 Lubricant Type G 26 Lubrication Amount φ 1 mm x 1 3 round 12 Lubrication Point Groove of ROLLER PF See Page 149 Lubricant Type G 26 Lubrication Amount φ 1 x 5mm 13 Lubrication Point Contact point betw...

Page 146: ...d 17 Lubrication Point Shaft for FRAME LEFT See Page 150 Lubricant Type G 26 Lubrication Amount φ 1 x 5mm 18 Lubrication Point Inside of the right hole of FRAME ASF B Apply grease evenly to the inside of the hole Use a brush to apply grease See Page 150 Lubricant Type G 26 Lubrication Amount φ 1 x 1mm 19 Lubrication Point Left and right edges of HOPPER ASSEMBLY C Use a brush to apply grease See Pa...

Page 147: ...tion Point No 4 A R N I N G n Never apply oil to the CR guide shaft directly This may cause fatal damage to the components of the printer n Avoid applying oil excessively to the oil pad This may cause fatal damage to the components of the printer BUSHING 12 RIGHT G 26 HOLDER PULLEY DRIVEN G 26 G 26 BUSHING 12 LEFT G 26 BUSHING 6 G 26 ...

Page 148: ...EN G 26 Lubrication Points No 5 6 G 26 ROLLER ASSEMBLY EJECT COMBINATION GEAR 12 28 8 G 26 G 26 FRAME MIDDLE Lubricating Area G 26 Spur Gear 27 2 Do not lubricate these hooks Printer Mechanism left side Lubrication Point No 8 Lubrication Point No 7 Lubrication Point No 9 Lubrication Point No 10 ...

Page 149: ...Revision C Maintenance Overview 149 G 26 SPUR GEAR 23 2 Lubrication Point No 11 ROLLER PF G 26 Lubrication Point No 12 ROLLER EJECT GROUND SPRING EJECT G 26 Lubrication Point No 13 ROLLER PF UNIT G 26 Lubrication Point No 14 ...

Page 150: ...n C Maintenance Overview 150 G 26 Lubrication Point No 15 3 PAPER GUIDE FRONT G 26 Lubrication Point No 15 1 G 26 Lubrication Point No 15 2 Shaft for FRAME LEFT G 26 Lubrication Point No 17 FRAME ASF B G 26 Lubrication Point No 18 ...

Page 151: ...PSON Stylus COLOR 760 Revision C Maintenance Overview 151 HOPPER ASSY C FRAME ASF B G 26 G 26 Lubrication Point No 19 270 mm between the screw and indent G 26 Indent Screw Lubrication Point No 20 ...

Page 152: ...APPENDIX C H A P T E R ...

Page 153: ... Head CN12 PF Encoder CN6 CR Encoder Table 7 1 Connector Summary of C298MAIN Connector Function Reference CN1 Parallel I F Connector CN3 USB Connector CN5 To PE Sensor Table 7 2 CN6 To ASF Sensor Table 7 3 CN8 To Print Head including CR Encoder Table 7 4 CN9 To Print Head Table 7 5 CN10 To Power Supply Board Table 7 6 CN11 To Control Panel Table 7 7 CN12 To PF Encoder Table 7 8 CN13 To PF Motor Ta...

Page 154: ...se trapezoid waveform 20 COM Head drive pulse trapezoid waveform 21 COM Head drive pulse trapezoid waveform Table 7 5 Connector CN9 Pin Signal Name I O Function 1 GND Ground 2 GND Ground 3 NCHG Out All nozzle fire selection signal 4 GND Ground 5 GND Ground 6 SCK Out Serial clock 7 SP Out Select signal for CH signal 8 SI6 Out Print data output 6 9 SI5 Out Print data output 5 10 SI4 Out Print data o...

Page 155: ...LED2 Out LED drive signal 2 9 GND Ground 10 LED1 Out LED drive signal 1 11 GND Ground 12 LED0 Out LED drive signal 0 Table 7 8 Connector CN12 Pin Signal Name I O Function 1 GND Ground 2 ENB In B phase signal Table 7 6 Connector CN10 Pin Signal Name I O Function 3 VCC Logic power supply 5V 4 ENA In A phase signal 5 GND Ground Table 7 9 Connector CN13 Pin Signal Name I O Function 1 PFA Out Phase dri...

Page 156: ... On b bit0 IEEE1284 mode 0 On 1 Off c 00H 00H 0BH Reserved 00H 0CH Reserved 00H 0DH Reserved 00H 0EH Reserved 00H 0FH Reserved 00H 10H CPSI password 00H 00H 11H CPSI password 00H 00H 12H CPSI password 00H 00H 13H CPSI password 00H 00H 14H CPSI password 00H 00H 15H CPSI password 00H 00H 16H Print direction control 0 Bi D 1 Uni D 2 Auto 02H 02H 17H CG table 0 PC 437 1 PC 850 00H 00H 18H Font 0 Couri...

Page 157: ...by 1 360 inch 00H 00H 31H 78H 78H 32H Bottom margin 1244 to 44 x 360 by 1 360 inch 1EH 1EH 33H F0H F0H 34H Page length 1244 to 44 x 360 by 1 360 inch 1EH 1EH 35H F0H F0H Table 7 11 EEPROM Address Map continued ddress Explanation Settings QPIT Settings Factory Settings 36H Reserved 00H 37H 00H 38H Reserved 00H 00H 39H 00H 00H 3AH 00H 00H 3BH 00H 00H 3CH Reserved 00H 3DH 00H 3EH Reserved 00H 3FH 00H...

Page 158: ...0H 00H Table 7 11 EEPROM Address Map continued ddress Explanation Settings QPIT Settings Factory Settings 5CH Ink counter A0 00H 00H 3 5DH 00H 00H 5EH Reserved 00H 00H 5FH 00H 00H 60H Ink counter Rb0 00H 00H 61H 00H 00H 62H Ink counter Rb80 00H 00H 63H 00H 00H 64H Ink counter Ry0 00H 00H 65H 00H 00H 66H Ink counter Rv80 00H 00H 67H 00H 00H 68H CL time 00H 69H 00H 6AH Reserved 00H 00H 6BH 00H 00H 6...

Page 159: ...ttings QPIT Settings Factory Settings A3H Head Actuator Rank ID for VhU 1 n 43 00H 1 4AH Head Actuator Rank ID for VhM2 1 n 37 00H 1 A5H Head Actuator Rank ID for VhB 1 n 37 00H 1 A6H Head Actuator Rank ID for AR 0 n 6 00H 1 A7H Microweave ID 1 n 9 00H 1 A8H Head Actuator Rank ID for IwB 30 n 70 00H 1 A9H Head Actuator Rank ID for IwC 30 n 70 00H 1 AAH Head Actuator Rank ID for IwM 30 n 70 00H 1 A...

Page 160: ... performed panel initialization of the ink overflow counter in EEPROM C2H USB ID 00H 1 D3 00H 1 D4 Reserved 00H D7H 00H D8H Custom EEPROM sub number 00H 00H D9H 00H 00H DAH 00H 00H DBH 00H 00H DCH Panel mask function bit7 Entry Self Test bit6 Entry Hex Dump bit5 Extended settings bit4 Reserved bit3 Reserved bit2 Cleaning bit1 Replace I C bit0 Load Eject 00H 00H DDH Reserved 00H DEH 00H DFH 00H E0H...

Page 161: ...PSON Stylus COLOR 760 Revision C ppendix Circuit Board Component Layouts 161 2 Circuit Board Component Layouts Figure 7 2 C298MAIN Component Layout Component Side Soldered Side ...

Page 162: ...PSON Stylus COLOR 760 Revision C ppendix Circuit Board Component Layouts 162 Figure 7 3 C298PSB Component Layout Figure 7 4 C298PSE Component Layout ...

Page 163: ...PSON Stylus COLOR 760 Revision C ppendix Circuit Board Component Layouts 163 Figure 7 5 C298PNL Component Layout ...

Page 164: ...ded Diagram 500 122 182 EPSON STYLUS COLOR 760 1 5 No 1 Rev 01 B B A 117 122 122 125 102 115 101 124 181 124 180 124 122 116 450 105 107 100 124 122 753 752 103 766 751 122 133 106 132 104 126 754 126 400 123 400 for EAI 401 123 For EUR S E ASIA OCEANIA RUSSIA FOR LATIN ...

Page 165: ...534 504 503 750 587 613 591 608 300 122 122 122 122 122 122 580 200 112 113 131 111 109 122 122 121 121 122 122 108 108 114 614 587 122 587 119 505 587 587 512 587 506 574 532 122 122 122 604 122 122 EPSON STYLUS COLOR 760 2 5 No 1 Rev 01 534 330 122 C A D G F J K E E 607 606 603 594 ...

Page 166: ...42 542 542 542 542 542 542 542 542 542 542 542 530 611 529 531 531 535 517 522 516 515 510 610 533 599 530 587 119 579 578 556 585 593 531 582 583 584 534 586 616 592 598 587 576 509 765 587 587 573 587 537 528 528 527 544 544 544 544 544 544 544 544 544 544 544 544 544 508 518 521 610 590 771 536 587 511 J M EPSON STYLUS COLOR 760 3 5 No 1 Rev 01 772 ...

Page 167: ...57 756 558 507 550 550 549 549 588 587 514 748 589 571 565 570 572 575 569 567 577 568 566 700 575 601 602 604 562 560 564 702 596 600 768 595 767 597 600 563 703 701 561 550 550 554 555 605 609 551 548 551 548 758 770 545 545 545 552 553 550 550 549 549 549 549 550 K C G L F L EPSON STYLUS COLOR 760 4 5 No 1 Rev 01 183 759 184 760 761 762 769 769 615 ...

Page 168: ...748 736 737 739 707 711 713 712 737 755 764 709 739 736 740 716 721 719 723 720 722 725 724 735 735 720 724 730 726 723 729 721 728 731 733 745 746 734 732 746 745 744 727 717 743 741 581 742 718 718 EPSON STYLUS COLOR 760 5 5 No 1 Rev 01 747 763 780 WITHOUT 741 742 743 747 748 WITH 581 ...

Page 169: ... 526 SPACER FIXING ROLLER PF B 112 COVER INLET UPPER B 501 FRAME ASSEMBLY LEFT 527 CRESCENT RING 113 COVER INLET LOWER B 502 MOTOR ASSEMBLY PF 528 PLAIN WASHER 12 2 0 5 17 S NA 114 SHIELD PLATE M B 503 SPUR GEAR 23 2 529 ROLLER ASSEMBLY PAPER EJECT 115 LOGO PLATE 504 COMBINATION GEAR 16 40 8 530 BUSHING 6 116 HOUSING SUB RIGHT 505 FRAME RIGHT FRONT 531 RETAINING RING TYPE E 4 117 HOUSING SUB LEFT ...

Page 170: ...RSION SPRING 0 22 583 LEVER PLANETARY PUMP 611 SCALLOP SP AW 2 10 F B 556 LEVER CR LOCK 584 SPUR GEAR 10 8 612 STOPPER LEVER CHANGE 557 GUIDE PLATE CR 585 U SHAPE SPRING 5 2 0 13 10 S NA 613 MOUNTING PLATE BOARD ASSEMBLY 558 SHEET CABLE 586 SPUR GEAR 8 4 614 FRAME RIGHT REAR 559 SCREW MOUNTING PF 587 CBS TITE SCREW M3 6 615 PLATE SLIDE CLEANER 560 CARRIAGE ASSEMBLY B 588 CP SCREW M3 6 616 U SHAPE ...

Page 171: ... TITE P4 SCREW 3 6 F ZN 721 TENSION SPRING 0 62 750 SPUR GEAR 27 2 722 LEVER PAPER RETURN RIGHT 751 PAPER GUIDE LOWER 723 TENSION SPRING 0 294 752 ABSORBER WASTE INK LARGE 724 ROLLER LD SUB 753 TRAY ABSORBER 725 HOLDER ROLLER LD SUB RIGHT 754 SPACER TRAY 726 PAD ASSY LEFT 755 BUSHING FIXING SHAFT LEFT 727 LEVER PAD RELEASE LEFT 756 PAPER SUPPORT SUB UPPER 728 HOLDER EDGE GUIDE LEFT 757 HOLDER PAPE...

Page 172: ...PSON Stylus COLOR 760 Revision C ppendix Circuit Diagrams 172 5 Circuit Diagrams ee the following pages for the circuit diagrams for the Stylus COLOR 760 ...

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