Dot missing occur and it is not recovered with CL | Epson C40UX

Stylus C40UX/C40SX/C20UX/C20SX

Revision A

Table 3-18. Dot missing occur and it is not recovered with CL

	Step	Detail phenomenon	Check point	Remedy
	No.	Detail phenomenon	Check point	Remedy
	No.

Table 3-19. Dot missing occur and it is not recovered with CL

	Step	Detail phenomenon	Check point	Remedy
	No.	Detail phenomenon	Check point	Remedy
	No.

1

In the CL sequence, the pump unit seems work correctly. But, any ink is not ejected to waste ink pad.

Moreover, any ink is not absorbed from the head to the cap.

5.Check if the Pump tube is connected to the bottom of the Cap assembly correctly

Pump tube

connection point

6.Check if the pump tube has a little slack between the Cap assembly and the pump unit when the Cap assembly is slide up completely.

			Tube
Cap assy.			Tube
Cap assy.


	Pump unit

5.Replace the Printer mechanism with new one.

6.Pump unit may coil the pump tube inside the unit. In this case, pull out the coiled tube from the pump unit carefully. After that, connect the pump tube to the Cap assembly after placing the tube correctly.

7.If the problem is not solved, replace the Printer mechanism with new one.

		In the CL sequence,	1. Check if the segment in	1.	Replace the I/C with new
		ink is ejected to the	the nozzle check patter		one in the I/C replacement
		Waste ink pad (this	is reduced every CL &		sequence.
		means pump unit & cap	Nozzle check pattern
	2	unit are working	printing.
	2	correctly). But, the dot	2. Check if any damage is	2.	Replace the Head FFC
		correctly). But, the dot	2. Check if any damage is	2.	Replace the Head FFC
		missing is not solved at	observed on the Head		with the new one.
		the specific nozzles	FFC.
		even if the several CLs		3.	Replace the printhead
		are performed.			with new one.

		In the CL sequence, ink	1. Check if the Head FFC	1.	Connect the Head FFC
		is ejected to the Waste	is connected to the CN9		securely to the CN9 on the
		ink pad. But, dot	on the Main board or		Main board or Printhead.
	3	missing is occurred on	Head FFC.	2.	Replace the Printhead
		all nozzle in the printing			with new one.
		and is not solved in the		3.	Replace the Main board
		several CLs.			with new one.

Troubleshooting

Troubleshooting with LED Error Indications

53

Image 53

Epson C40UX service manual Dot missing occur and it is not recovered with CL

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 Horizontal Printable area Available dot CR Speed Physical SpecificationPrinting Specification Paper Feeding Electrical specificationInput Data Buffer Feed condition Time Speed Envirormental Condition Safety ApprovalsReliability Acoustic Noise Parallel Interface Forward Channel Signal name In/Out Function descriptionUSB Interface Parameter Parallel I/F mode Typical time of tackParameter Minimum Maximum 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 Size Paper LMLeft RMRight TMTop Black BM Color BMMargin 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 † PF motor drive transmission path PF Motor SpecificationsPaper Feeding Mechanism Paper Loading Mechanism ASF Unit † Switch the PF motor drive to ASF unit side † Clutch Mechanism ASF unit function & PF Motor rotational direction† Transfer the PF motor drive to LD roller † 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 Black mode Printing modePrinting mode for Color mode Application of the DC Voltages Electrical Circuit Operating Principles1 C417 PSB/PSE board TRANST1 Main Elements 2 C413 MAIN/B Board Troubleshooting Motor Location Check Point Resistance Sensor Name Check Point Signal Level Switch ModeSensor Check Point 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 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 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 Edge guide Upper housing removalUpper housing CBP 3⋅ CBS P2 3⋅ ASF unit removal 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⋅ Protrusion Paper eject roller removalCBS 3⋅ Front Frame Gear Paper Eject roller USB Type CBS 3⋅ Parallel Type F.S-Tite 3⋅ Switch cover HooksMain board removal 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 Performance Priority Required AdjustmentRequired Adjustment Adjustment Program Initial Setting menu Main Menu Service Adjustment Program featureBasic adjustment items 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 For the initial ink charge operation is so large Head cleaningInitial ink charge 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 Lubrication Type/Point Remarks Lubrication Type/PointMain frame Right side view 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 Ref No Description Parts ListParts list 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