Overview, Printer Mechanism | Epson C40UX manual

Stylus C40UX/C40SX/C20UX/C20SX

Revision A

2.1 Overview

This section describes the operating principles of the printer mechanism and electrical circuit boards. The Stylus C40UX/C40SX/C20UX/C20SX has only the following two circuit boards:

Main board:

C413 MAIN/MAIN-B

Power supply board: C417 PSB/PSE

2.1.1 Printer Mechanism

The printer mechanism for Stylus C40UX/C40SX/C20UX/C20SX is designed newly. But, the basic component of the printer mechanism is same as previous product.

This printer consists of Print Head, Carriage Mechanism, Paper Feeding Mechanism, Paper Loading Mechanism, Ink System (Pump Mechanism, Cap Mechanism, and Carriage Lock Mechanism).

Like other EPSON ink jet printers, the Stylus C40UX/C40SX/C20UX/C20SX is equipped with two stepping motors; one for ASF, Paper feeding/ Pump mechanism, and one for CR mechanism. ASF unit uses rear entry front eject system. This ASF unit is also designed newly and single LD roller loads the paper to the printer mechanism.

For cap assembly, Stylus C40UX/C40SX/C20UX/C20SX uses valveless mechanism; new design for this model.

Paper Eject Roller

PF Motor

Star Wheel Roller

CR unit

PF Roller

CR Timing belt

HP/PE/IC Sensor sensor

LD Roller

Paper feed back plate

Paper separation pad

ASF Hopper Spring

Clutch mechanism

Pump unit

CR Motor

Cap Assembly

Figure 2-1. Printer Mechanism block diagram

Operating Principles

Overview

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Image 25

Epson C40UX service manual Overview, Printer Mechanism

Contents

Stylus C40UX/C40SX/C20UX/C20SX General Notice Precautions About This Manual Revision Status Contents Disassembly Adjustment Product Description Eeprom 29 H bit 0 value Model Delay time during printing Delay of oparationDifferences between the Stylus C20 and the Stylus C40 Throughput Printing Specification Physical SpecificationHorizontal Printable area Available dot CR Speed Paper Feeding Electrical specificationInput Data Buffer Feed condition Time Speed Envirormental Condition Safety ApprovalsReliability Acoustic Noise USB Interface Signal name In/Out Function descriptionParallel Interface Forward Channel Parameter Minimum Maximum Parallel I/F mode Typical time of tackParameter Parallel Interface Reverse Channel Pin No Signal Name ReturnG Functional description Prevention Hosts from Data Transfer Time-out IEEE1284.4 Protocol Control Panel Operate SwitchPanel Functions Printer Condition and Panel Status Printer Initialization Errors Paper Handling Paper Specification Printable Area for Cut Sheet Printing Area Margin Paper LMLeft RMRight TMTop Black BM Color BMSize Color Ink Cartridge Black Ink Cartridge Operating Principles Printer Mechanism Overview Printhead Sectional Drawing Printhead Ejecting State Normal StateInk Path Ink Cavity Items Specifications Carriage Motor SpecificationCarriage Mechanism Detection position I/C change position Paper Feeding Mechanism PF Motor Specifications† PF motor drive transmission path Paper Loading Mechanism ASF Unit † Switch the PF motor drive to ASF unit side † Transfer the PF motor drive to LD roller ASF unit function & PF Motor rotational direction† Clutch Mechanism † Paper Return Plate Pad holder 11. Disengage & Clutch mechanism 13. ASF Paper Loading Sequence PF motor rotational direction & Ink System Mechanism Ink System Mechanism Wiper with the cap unit 16. Cap Mechanism 18. non porous pad in cap Stylus C40/C20 Non porous pad in cap † Timer Cleaning † Manual CleaningInk Sequence † Initial ink charge † Flashing Printing mode for Color mode Printing modePrinting mode for Black mode 1 C417 PSB/PSE board Electrical Circuit Operating PrinciplesApplication of the DC Voltages TRANST1 Main Elements 2 C413 MAIN/B Board Troubleshooting Sensor Check Point Sensor Name Check Point Signal Level Switch ModeMotor Location Check Point Resistance Error Indicator of Operation Panel Troubleshooting with LED Error IndicationsError Condition and possible cause Printer Status Indicators Priority Power Error Step Detail phenomenon Check point Remedy Paper out error indication Spur gear 35.2 is Rotating If it is no problem, proceed Paper jam error indication 11. Paper Jam Error indication 10. Paper jam error indication12. Ink Out error indication Detail phenomenon Check point Remedy 13. Multiple papers are always loaded 15. Fatal Error indication14. Paper is always loaded without any print job 17. Dot missing occur and it is not recovered with CL 19. Dot missing occur and it is not recovered with CL 18. Dot missing occur and it is not recovered with CL 21. Print quality is not good 20. Print quality is not good 22. Print quality is not good Disassembly and Assembly Printer Precautions Et que le cordon d’alimentation soit debranche Tools Name and Specification Outward FormScrews Name Supplier Parts No Work Completion Check Work Completion CheckClassifi Check Point Status Cation Classifi Check Point Status Disassembling Flowchart Disassembly Upper housing Upper housing removalEdge guide CBP 3⋅ CBS P2 3⋅ ASF unit removal Waste ink pad removal „ Waste ink counter reset operation. Refer to SectionTube stopper Waste ink pad CN2 PS unit S 3⋅ P 3⋅ PS unit removal„ Tightening Torque for screw +/-1 kgf.cm Protrusion Paper eject roller removalCBS 3⋅ Front Frame Gear Paper Eject roller Main board removal Switch cover HooksUSB Type CBS 3⋅ Parallel Type F.S-Tite 3⋅ 22. Removing the Main board 21. Disconnecting the connectors CR motor removal Carriage unit Printhead unit removalCarriage cover Printhead unit 30. Disconnecting the FFC LD unit Cables LD unit removal Printer mechanism removal Adjustment Required Adjustment Required AdjustmentPerformance Priority Adjustment Program Initial Setting menu Basic adjustment items Adjustment Program featureMain Menu Service Feed command until the paper is set in the ASF Bi-d adjustment even if the paper is out in the ASF. When Head ID Eeprom initial setting Read out the Head ID from the Eeprom Bi-D 10. Choose the Bi-d adjustment USB ID 13. Bi-d adjustment input menu 15. Choose the USB ID input menu 16. Choose the Top margin menu Top margin Initial ink charge Head cleaningFor the initial ink charge operation is so large 21. Choose the Refurbishment for DOA menu Refurbishment for DOA Check the present counter value Protection counter check Excepting ESP Clear the present counter value 26. Eeprom check function Eepron check Eeprom back up data 29. Eeprom backup data 31. A4 Check pattern 15 A4 pattern will print 32. A4 Check pattern Maintenance Cleaning † Head Cleaning Service Maintenance† Maintenance Error Clear Lubrication Main frame Right side view Lubrication Type/PointLubrication Type/Point Remarks 200mm Appendix Major Component Unit Connector Summary Pin CN9-Printhead Eeprom Address Map Address Explanation SettingEeprom Address Map Factory Appendix Eeprom Address Map 103 Appendix Eeprom Address Map 104 Market Eeprom address Eeprom setting Bit7 Bit6 Name modeBit3 Bit2 D4mode Bit1 Bit0 D4mode C413MAIN component layout Component Layout Appendix Component Layout 107 Parts list Parts ListRef No Description Stylus C40UX/C40SX/C20UX/C20SX Exploded Diagram 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