Print quality is not good | Epson C40UX guide

Stylus C40UX/C40SX/C20UX/C20SX

Revision A

.

Table 3-20. Print quality is not good

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

Table 3-21. Print quality is not good

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

1

Vertical banding is appeared against the CR movement direction. And it looks like uneven printing.

CR movement

direction

1.Check if each segment is printed correctly in the nozzle check pattern.

2.Check if the CR rail on the main frame is not extremely dirty, etc.

3.Check if the surface of the CR sliding portion on the Paper eject frame has enough oil.

G-58 lubrication

4.Check if the surface of the Paper eject frame is flat.

1.Perform the CL and check the nozzle check pattern.

2.Clean the CR rail on the main frame and lubricate G-58.

3.Clean the surface of the CR sliding portion on the Paper eject frame and lubricate specific amount of the G-58.

4.Replace the Paper eject frame with new one.

							5.	Replace the following
								parts.
1	Ditto						•	CR motor
							•	CR timing belt
							•	Compression spring 11.8

						1. Check if each segment	1.	Perform the CL and
						is printed correctly in		check the nozzle check
						the nozzle check		pattern. by using the
						pattern.		Adjustment program.
	Micro banding appears					2. Check if the suitable	2.	Use the suitable paper
	Micro banding appears					paper is used		according to the printer
	horizontally against the					according to the		driver setting.
	paper feeding direction					printer driver setting.
	and it appears with the					3. Check if the Paper	3.	Clean the surface of the
	same width.					3. Check if the Paper	3.	Clean the surface of the
	same width.					feed roller is dirty.		PF roller carefully with
						feed roller is dirty.		PF roller carefully with
								the soft brush

	2	CR movement	4. Check if the following	4. Replace the Printer
	2		parts do not have any	mechanism with new
			parts do not have any	mechanism with new
		direction	damage.	one.
			damage.	one.
			Spur gear 60

PF motor pinion	5. Replace the Printhead
	with new one.

Troubleshooting

Troubleshooting with LED Error Indications

54

Image 54

Epson C40UX service manual Print quality is not good

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 Physical Specification Printing SpecificationHorizontal Printable area Available dot CR Speed Input Data Buffer Electrical specificationPaper Feeding Feed condition Time Speed Reliability Safety ApprovalsEnvirormental Condition Acoustic Noise Signal name In/Out Function description USB InterfaceParallel Interface Forward Channel Parallel I/F mode Typical time of tack Parameter Minimum MaximumParameter 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 Paper LMLeft RMRight TMTop Black BM Color BM MarginSize 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 Specifications Paper Feeding Mechanism† PF motor drive transmission path † Switch the PF motor drive to ASF unit side Paper Loading Mechanism ASF Unit ASF unit function & PF Motor rotational direction † Transfer the PF motor drive to LD roller† Clutch Mechanism 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 Printing mode for Color modePrinting mode for Black mode Electrical Circuit Operating Principles 1 C417 PSB/PSE boardApplication of the DC Voltages TRANST1 2 C413 MAIN/B Board Main Elements Troubleshooting Sensor Name Check Point Signal Level Switch Mode Sensor Check PointMotor Location Check Point Resistance 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 15. Fatal Error indication 13. Multiple papers are always loaded14. Paper is always loaded without any print job 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 Upper housing removal Upper housingEdge guide ASF unit removal CBP 3⋅ CBS P2 3⋅ „ Waste ink counter reset operation. Refer to Section Waste ink pad removalTube stopper Waste ink pad PS unit removal CN2 PS unit S 3⋅ P 3⋅„ Tightening Torque for screw +/-1 kgf.cm CBS 3⋅ Paper eject roller removalProtrusion Front Frame Paper Eject roller Gear Switch cover Hooks Main board removalUSB Type CBS 3⋅ Parallel Type F.S-Tite 3⋅ 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 Required Adjustment Required AdjustmentPerformance Priority Adjustment Program Initial Setting menu Adjustment Program feature Basic adjustment itemsMain Menu Service 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 Head cleaning Initial ink chargeFor the initial ink charge operation is so large 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 Main frame Right side viewLubrication Type/Point Remarks 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 Parts List Parts listRef No Description 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