Prevention Hosts from Data Transfer Time-out | Epson C40UX instruction

Stylus C40UX/C40SX/C20UX/C20SX

Revision A

Extensibility Request :

The printer responds affirmatively when the extensibility request values are 00H or 04H, that mean,

00H : Request Nibble Mode Reverse Channel Transfer.

04H : Request Device ID;

Return Data Using Nibble Mode Rev Channel Transfer.

Device ID :

The printer sends following device ID string when it is requested.

When IEEE1284.4 is enabled, [00H] [4EH] MFG:EPSON; CMD:ESCPL2,BDC,D4; MDL:Stylus[SP]XXX;

CLS:PRINTER;

DES:EPSON[SP]Stylus[SP]XXX; When IEEE1284.4 is disabled, [00H] [4BH]

MFG:EPSON;

CMD:ESCPL2,BDC;

MDL:Stylus[SP]XXX;

CLS:PRINTER;

DES:EPSON[SP]Stylus[SP]XXX;

*XXX is C20 or C40

Note	: (1) [00H] denotes a hexadecimal value of zero.

(2)MDL value depends on the EEPROM setting. Refer to Appendix F.

(3)CMD value depends on the IEEE1284.4 setting, Refer to Appendix F.

1.4.4Prevention Hosts from Data Transfer Time-out

Generally, hosts abandon data transfer to peripherals when a peripheral is in the busy state for dozens of seconds continuously. To prevent hosts from this kind of time-out, the printer receives data very slowly, several bytes per minute, even if the printer is in

busy state. This slowdown is started when the rest of the input buffer becomes several hundreds of bytes. Finally, the printer is in the busy state continuously when the input buffer is full.

PRODUCT DESCRIPTION

INTERFACE

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Image 16

Epson C40UX service manual Prevention Hosts from Data Transfer Time-out

Contents

Stylus C40UX/C40SX/C20UX/C20SX General Notice Precautions About This Manual Revision Status Contents Adjustment Disassembly Product Description Delay of oparation Eeprom 29 H bit 0 value Model Delay time during printingDifferences between the Stylus C20 and the Stylus C40 Throughput Printing Specification Physical SpecificationHorizontal Printable area Available dot CR Speed Electrical specification Paper FeedingInput Data Buffer Feed condition Time Speed Safety Approvals Envirormental ConditionReliability Acoustic Noise USB Interface Signal name In/Out Function descriptionParallel Interface Forward Channel Parameter Minimum Maximum Parallel I/F mode Typical time of tackParameter Pin No Signal Name ReturnG Functional description Parallel Interface Reverse Channel Prevention Hosts from Data Transfer Time-out IEEE1284.4 Protocol Operate Switch Control PanelPanel Functions Printer Condition and Panel Status Errors Printer Initialization Paper Specification Paper Handling Printing Area Printable Area for Cut Sheet Margin Paper LMLeft RMRight TMTop Black BM Color BMSize Black Ink Cartridge Color Ink Cartridge Operating Principles Overview Printer Mechanism Printhead Printhead Sectional Drawing Normal State Ejecting StateInk Path Ink Cavity Carriage Motor Specification Items SpecificationsCarriage Mechanism Detection position I/C change position Paper Feeding Mechanism PF Motor Specifications† PF motor drive transmission path † Switch the PF motor drive to ASF unit side Paper Loading Mechanism ASF Unit † Transfer the PF motor drive to LD roller ASF unit function & PF Motor rotational direction† 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 † Manual Cleaning † Timer 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 2 C413 MAIN/B Board Main Elements Troubleshooting Sensor Check Point Sensor Name Check Point Signal Level Switch ModeMotor Location Check Point Resistance Troubleshooting with LED Error Indications Error Indicator of Operation PanelError Condition and possible cause 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 10. Paper jam error indication 11. 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 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 Name and Specification Outward Form ToolsScrews Name Supplier Parts No Work Completion Check Work Completion CheckClassifi Check Point Status Cation Classifi Check Point Status Disassembly Disassembling Flowchart Upper housing Upper housing removalEdge guide ASF unit removal CBP 3⋅ CBS P2 3⋅ 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 Paper eject roller removal ProtrusionCBS 3⋅ Front Frame Paper Eject roller Gear Main board removal Switch cover HooksUSB Type CBS 3⋅ Parallel Type F.S-Tite 3⋅ 21. Disconnecting the connectors 22. Removing the Main board CR motor removal Printhead unit removal Carriage unitCarriage cover 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 Basic adjustment items Adjustment Program featureMain 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 Initial ink charge Head cleaningFor 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 Service Maintenance † Head Cleaning† Maintenance Error Clear Lubrication Main frame Right side view Lubrication Type/PointLubrication Type/Point Remarks 200mm Appendix Connector Summary Major Component Unit CN9-Printhead Pin Address Explanation Setting Eeprom Address MapEeprom Address Map Factory Appendix Eeprom Address Map 103 Appendix Eeprom Address Map 104 Bit7 Bit6 Name mode Market Eeprom address Eeprom settingBit3 Bit2 D4mode 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