Epson Photo750 manual Repair of the Printing Mechanism

Page 53

EPSON Stylus Photo 750

Revision A

Table 3-12. Repair of the Printing Mechanism

Symptom		Condition		Cause		Check Point		Solution

						Check visually if
				Head FFC is		the head FFC on		Connect FFC
				out of		the board or		Connect FFC
				out of		the board or		properly.
				connection.		carriage is		properly.
				connection.		carriage is
						connected firmly.

				FFC is		Check the FFC		Replace the
				disconnected		Check the FFC		Replace the
				disconnected		by using a tester.		FFC.
				inside.		by using a tester.		FFC.
		Carriage		inside.

Printing is not						Install new I/C
Printing is not		moves but no		I/C is		Install new I/C
performed.		printing is		I/C is		and perform the		Replace I/C.
performed.		printing is		defective.		and perform the		Replace I/C.
		performed.		defective.		self-test.
		performed.				self-test.

						If the condition
						does not improve
						even after 2 or 3
				Head Unit is		times of cleaning		Replace the
				defective.		operation,		head unit.
						replace the head
						unit and perform
						the self-test.

						Check the
				Print head		printing quality		Perform
				surface is not		after performing		Perform
				surface is not		after performing		cleaning.
				clean.		the cleaning		cleaning.
				clean.		the cleaning
						several times.
		Only a
		Only a				Check the		Replace the
		particular dot		Head unit is		Check the		Replace the
Abnormal		particular dot				printing quality		head, if the
Abnormal		causes				printing quality		head, if the
printing		causes		defective.		after performing		print quality
printing		abnormal		defective.		after performing		print quality
		abnormal				the cleaning		does not
		printing.				the cleaning		does not
		printing.				several times.		recover.
						several times.		recover.

				Absorber in		Visually check		Replace the
				the cap is		the condition of		absorber in
				touching the		the head		the cap if it is
				head surface.		absorber.		deformed.

Table 3-13. Repair of the Printing Mechanism

Symptom		Condition		Cause		Check Point		Solution

				Print head		Perform cleaning
				surface is not		several times		Perform
				clean.		and check the		cleaning.
						print quality.

				FFC is		Check the FFC		Replace the
				disconnected		Check the FFC		Replace the
				disconnected		by using a tester.		head FFC.
				inside.		by using a tester.		head FFC.
				inside.

				Head FFC is		Install new I/C		Connect Head
				out of		and perform the		Connect Head
				out of		and perform the		FFC firmly.
		Sometime		connection.		self-test.		FFC firmly.
		Sometime		connection.		self-test.
		printing is not
		printing is not				If the condition
		performed.				If the condition
		performed.				does not improve		Replace the
						does not improve		Replace the
						even after 2 or 3		head unit, if it
				Head Unit is		times of cleaning		does not
Abnormal				defective.		operation,		recover after
Abnormal						replace the head		performing
Printing						replace the head		performing
Printing						unit and perform		cleaning.
						unit and perform		cleaning.
						the self-test.

				I/C is		Install the new
				I/C is		I/C and perform		Replace I/C.
				defective.		I/C and perform		Replace I/C.
				defective.		self-test.
						self-test.

						Check if the		Connect FFC
				The head FFC		head FFC on the		Connect FFC
				is out of		board or carriage		properly.
				connection.		is connected
		Black specks				surely.
		Black specks
		or dots.						Replace the
								Replace the
				The head unit		Check		head if there is
				The head unit		connection with		no connection
				is defective.		connection with		no connection
				is defective.		the head FFC.		problem with
						the head FFC.		problem with
								the FFC.

Troubleshooting

Unit Repair (Printer Mechanism)

48

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Contents 659,&#0$18$ General Notice Precautions About This Manual Revision Status Table of Contents Maintenance Product Description „ Holds 10 transparency films General CharacteristicsOverview General Description Raster Graphics ModePrinting Printing Speed„ No curled, wrinkled, scuffing or torn paper be used Paper SpecificationPaper Feeding Width Length Margin Typ Min Printable AreaPaper Left Right Top Bottom Setting Position of Adjust Lever Adjust Lever SettingsPaper Lever position Adjustment Value EnvelopeEnvironmental Condition Environmental ConditionsColor Ink Cartridge Ink CartridgeBlack Ink Cartridge Safety Approvals Electric SpecificationInput Data Buffer Reliability14.1 ESC/P Control Codes CE MarkingPrinter Language and Emulation „ Dot size control ESC e „ Raster header ESC D „ Raster body Parallel Interface Connector pin assignment and signalsParallel InterfaceForward channel Parallel I/FParallel InterfaceReverse channel Pin Signal Return In/Out Function Description Name GND pinXflag Out Connect pin assignment and signals10. Typical Time of Tack Parallel I/F Mode Typical time of tackSerial Interface 12. Connector pin assignment and signals11. Serial interface 13. X-ON/X-OFF, DTR protocolUSBUniversal Serial Bus Interface 14. Connector pin assignment and signalsPin Signal Name Out Function Description Ieee 1284.4 protocol Prevention of data transfer time-out on HostInterface selection Switches Bi-directional CommandFunction Control Code18. Special setting mode Special Setting ModeLED Indications 17. Status printingIndicators Errors19. Printer Status displayed on the control panel Ink Out Paper Out Priority Black ColorInitialization „ When you need to perform test print after the repairPhysical Specification Initialization SettingClassification Name Consumables and options20. Consumables Operating Principles Printer Mechanism Printer MechanismEpson Stylus Photo Revision a Operating Principles of Electric Circuit 1 C257 PSB Power Supply CircuitOutput Voltage Voltage UsageTRANST1 Major Elements 2 C259 Main Control CircuitMajor Elements Location FunctionReset Circuit Reset CircuitSensor Circuit Sensor CircuitHead Drive Circuit Timer CircuitEeprom Control Circuit Paper Feed Pump Motor Drive Circuit Paper Feed Pump Motor PF/Pump Motor Drive Circuit10. Carriage Motor Drive Circuit Carriage MotorCR Motor Drive CircuitTroubleshooting Sensor Check Point Check Point Signal Level Switch ModeMotor, Coil Resistance Motor Location Check Point ResistancePaper Ink End Check Black Color Error IndicationLED Indication Condition Remedy Symptom Cause Flow Chart Unit Level TroubleshootingSymptoms and Corresponding Flow Chart E c k t h e Error S s a g e . R e f e r t o T a b le 3 A R T Sympto Condition Cause Check point Solution Unit Repair Power Supply BoardRepair of the Power Supply Board Repair of the Control Board Repair of the Control BoardEpson Stylus Photo Revision a Unit Repair Printer Mechanism Symptom Condition Cause Check Point Solution10. Repair of the Printer Mechanism 11. Repair of the Printer Mechanism13. Repair of the Printing Mechanism 12. Repair of the Printing Mechanism15. Repair of the Printer Mechanism 14. Repair of the Printer MechanismDisassembly and Assembly Name Supplier Parts No Phillips Screw Driver PrecautionsTools Classifi Check Point Status Cation Work Completion CheckCheck List Flowchart below shows step-by step disassembly procedures DisassemblyHousing Removal Housing RemovalShield Plate, M/B Removal Circuit Boards RemovalE P O Control Panel Removal Control Panel RemovalAbsorber Tray, AssemblyA Removal Absorber Tray, AssemblyA RemovalPrint Head Removal Printer Mechanism RemovalPrint Head Installation E „ Be sure that the grounding plate is installed to„ Be careful not to damage the rubber part of the cap Pump, Assembly/Cap, Assembly Removal11. Ink Tube Bi-D adjustment. See Bi-D Adjustment on Motor, Assembly, CR Removal15. Motor, Assembly, PF Installation Motor Assembly PF Removal5.5 ASF, Assembly Removal E „ When removing or installing the Hopper Paper Feed Roller Assembly Removal18. Roller Assembly, LD Removal Roller Assembly, LD Left/Right Removal19. Bush Parallel Adjust Removal Carriage Assembly Removal20. Carriage Assembly Removal 21. PE Sensor Assembly Removal PE Sensor Assembly Removal23. Roller, Assembly, Paper Exit Removal Roller, Assembly, PF Removal24. Roller, Assembly, PF Removal 25. HP Sensor Removal HP Sensor Removal26. Bush Holder, Sensor, I/C Removal Cartridge SensorSensor, I/C Removal29. Sensor, I/C Removal Adjustment Required Adjustment Required Adjustment„ Do not scratch special coated surface of the PF AdjustmentPaper Gap Adjustment Epson Stylus Photo Revision B Adjustment Program Adjustment by Adjustment ProgramHow to use the Adjustment Program „ You have to go through the menu to inputOptions in the Program and Keys to Use Setting Destination Information Head Voltage ID Adjustment Screw position for fixing the print head Head Angular AdjustmentAdjustment, the following screen will be appeared Magnetized condition when the printer has been leftU Preventing from the CR motor fall into the non Alone more then 5 minutes in the Head AngulerBi-D Adjustment Pattern Sample Bi-D AdjustmentHead Cleaning Initial Ink Charge Protect Counter Value Protect Counter ResetCounter Value for Ink Absorber Maintenance „ Never use chemical solvents, such as thinner, to CleaningService Maintenance „ Never use oil and the grease other than those LubricationLubrication Point Type Name Epson Code SupplierASF A R , 2 3 V e r a p p l y t h e o i l Appendix Connector Summary for C259Main Connector SummaryConnector CN4 Major Component UnitConnector CN6 Connector CN5Connector CN7 Connector CN810. Connector CN11 Connector CN10C259 Main Component Layout Component LayoutAppendix Component Layout 101 Exploded Diagram-1 Exploded DiagramExploded Diagram for Epson Stylus Photo 750 2/3 Exploded Diagram for Epson Stylus Photo 750 3/3 Electric Circuit Page Page