Printhead Sectional Drawing | Epson C40UX instruction

Stylus C40UX/C40SX/C20UX/C20SX

Revision A

2.1.2 Printhead

The printhead uses a new developed U-CHIPS head and Stylus C40UX/C40SX/ C20UX/C20SX can perform multiple shot printing and variable printing. Printhead nozzle configuration is as follows.

48 nozzles x 1 row: Black (nozzle pitch of the row: 1/120 inch)

45 nozzles x 1 row: Color (nozzle pitch of the row: 1/120 inch)

In the one row for the color, 15 nozzles are assigned for each yellow, magenta, cyan color)

The basic operating principles of the printhead, which plays a major role in printing, are the same as previous models; on-demand method which uses PZT (Piezo Electric Element). In order to uniform the amount of ejecting ink, the printhead has its own head ID (6 digits for this printhead) which adjust PZT voltage drive features.

The printer read the head ID form EEPROM and generates appropriate PZT drive voltage to prevent amount of ink from varying by printheads.

Following explains printhead basic components.

PZT

PZT is an abbreviation of Piezo Electric Element. Certain amount of voltage expands and contracts PTZ. The drive wave generated on MAIN board drives PZT and PZT pushes the top cavity which has ink stored to discharge the ink from each nozzle on the nozzle plate.

Ink Cavity

The ink absorbed from the ink cartridge goes through the filter and then is stored temporarily in this tank called “cavity” until PZT is driven.

Nozzle Plate

The board with nozzle holes on the printhead surface is called Nozzle Plate.

Filter

When the ink cartridge is installed, if any dirt or dust around the cartridge needle is absorbed into the head, there is a great possibility of causing nozzle clog and disturbance of ink flow, and finally causing alignment failure and dot missing. To prevent this problem, a filter is set below the cartridge needle, where ink is filtered.

Head Driver Board

Ink Cartridge

Needle

Filter

Nozzle Plate	PZT	Cavity

Figure 2-2. Printhead Sectional Drawing

Operating Principles

Overview

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Image 26

Epson C40UX service manual Printhead Sectional Drawing

Contents

Stylus C40UX/C40SX/C20UX/C20SX General Notice Precautions About This Manual Revision Status Contents Adjustment Disassembly Product Description Differences between the Stylus C20 and the Stylus C40 Delay of oparationEeprom 29 H bit 0 value Model Delay time during printing Throughput Horizontal Printable area Available dot CR Speed Physical SpecificationPrinting Specification Input Data Buffer Electrical specificationPaper Feeding Feed condition Time Speed Reliability Safety ApprovalsEnvirormental Condition Acoustic Noise Parallel Interface Forward Channel Signal name In/Out Function descriptionUSB Interface Parameter Parallel I/F mode Typical time of tackParameter Minimum Maximum Pin No Signal Name ReturnG Functional description Parallel Interface Reverse Channel Prevention Hosts from Data Transfer Time-out IEEE1284.4 Protocol Panel Functions Operate SwitchControl Panel Printer Condition and Panel Status Errors Printer Initialization Paper Specification Paper Handling Printing Area Printable Area for Cut Sheet Size Paper LMLeft RMRight TMTop Black BM Color BMMargin Black Ink Cartridge Color Ink Cartridge Operating Principles Overview Printer Mechanism Printhead Printhead Sectional Drawing Ink Path Normal StateEjecting State Ink Cavity Carriage Mechanism Carriage Motor SpecificationItems Specifications Detection position I/C change position † PF motor drive transmission path PF Motor SpecificationsPaper Feeding Mechanism † Switch the PF motor drive to ASF unit side Paper Loading Mechanism ASF Unit † Clutch Mechanism ASF unit function & PF Motor rotational direction† Transfer the PF motor drive to LD roller 11. Disengage & Clutch mechanism † Paper Return Plate Pad holder 13. ASF Paper Loading Sequence Ink System Mechanism PF motor rotational direction & Ink System Mechanism 16. Cap Mechanism Wiper with the cap unit Non porous pad in cap 18. non porous pad in cap Stylus C40/C20 Ink Sequence † Manual Cleaning† Timer Cleaning † Initial ink charge † Flashing Printing mode for Black mode Printing modePrinting mode for Color mode Application of the DC Voltages Electrical Circuit Operating Principles1 C417 PSB/PSE board TRANST1 2 C413 MAIN/B Board Main Elements Troubleshooting Motor Location Check Point Resistance Sensor Name Check Point Signal Level Switch ModeSensor Check Point Error Condition and possible cause Troubleshooting with LED Error IndicationsError Indicator of Operation Panel Printer Status Indicators Priority Power Error Paper out error indication Step Detail phenomenon Check point Remedy Spur gear 35.2 is Rotating If it is no problem, proceed Paper jam error indication 12. Ink Out error indication 10. Paper jam error indication11. Paper Jam Error indication Detail phenomenon Check point Remedy 14. Paper is always loaded without any print job 15. Fatal Error indication13. Multiple papers are always loaded 17. Dot missing occur and it is not recovered with CL 18. Dot missing occur and it is not recovered with CL 19. Dot missing occur and it is not recovered with CL 20. Print quality is not good 21. Print quality is not good 22. Print quality is not good Disassembly and Assembly Precautions Printer Et que le cordon d’alimentation soit debranche Screws Name and Specification Outward FormTools Name Supplier Parts No Classifi Check Point Status Cation Work Completion CheckWork Completion Check Classifi Check Point Status Disassembly Disassembling Flowchart Edge guide Upper housing removalUpper housing ASF unit removal CBP 3⋅ CBS P2 3⋅ Tube stopper Waste ink pad „ Waste ink counter reset operation. Refer to SectionWaste ink pad removal „ Tightening Torque for screw +/-1 kgf.cm PS unit removalCN2 PS unit S 3⋅ P 3⋅ CBS 3⋅ Paper eject roller removalProtrusion Front Frame Paper Eject roller Gear USB Type CBS 3⋅ Parallel Type F.S-Tite 3⋅ Switch cover HooksMain board removal 21. Disconnecting the connectors 22. Removing the Main board CR motor removal Carriage cover Printhead unit removalCarriage unit Printhead unit 30. Disconnecting the FFC LD unit removal LD unit Cables Printer mechanism removal Adjustment Performance Priority Required AdjustmentRequired Adjustment Adjustment Program Initial Setting menu Main Menu Service Adjustment Program featureBasic adjustment items Bi-d adjustment even if the paper is out in the ASF. When Feed command until the paper is set in the ASF Eeprom initial setting Head ID Read out the Head ID from the Eeprom 10. Choose the Bi-d adjustment Bi-D 13. Bi-d adjustment input menu USB ID 15. Choose the USB ID input menu Top margin 16. Choose the Top margin menu For the initial ink charge operation is so large Head cleaningInitial ink charge Refurbishment for DOA 21. Choose the Refurbishment for DOA menu Protection counter check Check the present counter value Clear the present counter value Excepting ESP Eepron check 26. Eeprom check function 29. Eeprom backup data Eeprom back up data 15 A4 pattern will print 31. A4 Check pattern 32. A4 Check pattern Maintenance Cleaning † Maintenance Error Clear Service Maintenance† Head Cleaning Lubrication Lubrication Type/Point Remarks Lubrication Type/PointMain frame Right side view 200mm Appendix Connector Summary Major Component Unit CN9-Printhead Pin Eeprom Address Map Address Explanation SettingEeprom Address Map Factory Appendix Eeprom Address Map 103 Appendix Eeprom Address Map 104 Bit3 Bit2 D4mode Bit7 Bit6 Name modeMarket Eeprom address Eeprom setting Bit1 Bit0 D4mode Component Layout C413MAIN component layout Appendix Component Layout 107 Ref No Description Parts ListParts list Exploded Diagram Stylus C40UX/C40SX/C20UX/C20SX Exploded Diagram Appendix Exploded Diagram 110 Appendix Exploded Diagram 111 Stylus C40UX/C40SX/C20UX/C20SXRevision a Appendix Exploded Diagram 113 Appendix Exploded Diagram 114 Electrical Circuits Page Page Page Page