Troubleshooting Motors and Sensors, Sensor Check | Epson Scan 2500

EPSON Stylus Scan 2500

Revision A

3.4 Troubleshooting Motors and Sensors

Table 3-16. Motor Resistance and Measurement Procedure

	Motor Name	Location	Check Point		Resistance
	Motor Name	Location	Check Point		Resistance

	CR Motor	CN7 (MAIN board *)	Pins 1	& 3,	7.8 Ohms ± 10%
	CR Motor	CN7 (MAIN board *)	Pins 2	& 4	7.8 Ohms ± 10%
			Pins 2	& 4

	PF (Pump)	CN8 (MAIN board *)	Pins 1	& 3,	7.8 Ohms ± 10%
	Motor	CN8 (MAIN board *)	Pins 2	& 4	7.8 Ohms ± 10%
	Motor		Pins 2	& 4

Table 3-17. Sensor Check

	Sensor Name	Location	Signal Level	Sensor Status
	Sensor Name	Location	Signal Level	Sensor Status

	Paper End	CN5/Pins 1 & 2	Close: more than 2.4V	No paper
	Sensor	CN5/Pins 1 & 2	Close: more than 2.4V	No paper
	Sensor

	Carriage Home	CN4/ Pins 1 & 2	Close: more than 2.4V	Out of home
	Position Sensor	CN4/ Pins 1 & 2	Close: more than 2.4V	position

	ASF HP Sensor	CN6/ Pins 1 & 2	Close: more than 2.4V	Out of home
	ASF HP Sensor	CN6/ Pins 1 & 2	Close: more than 2.4V	position
				position

	Black Cartridge	CN9/Pins 1 & 19	Off: more than 2.4V	Black cartridge
	Sensor	CN9/Pins 1 & 19	Off: more than 2.4V	installed
	Sensor			installed

	Color Cartridge	CN9/Pins 2 & 19	Off: more than 2.4V	Color cartridge
	Sensor	CN9/Pins 2 & 19	Off: more than 2.4V	installed
	Sensor			installed

				Change the VH
	Thermistor	CN9/ Pins 2 & 19	Analog data	voltage of charge
	Thermistor	CN9/ Pins 2 & 19	Analog data	pulse for common
				pulse for common
				driver circuit

Troubleshooting

Troubleshooting Motors and Sensors

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Image 74

Epson Scan 2500 service manual Troubleshooting Motors and Sensors, Motor Resistance and Measurement Procedure, Sensor Check

Contents

Epson Stylus Scan Epson Stylus Scan Revision a Precautions Preface Revision Issued DateRevision Status Description Epson Stylus Scan Revision a Contents Maintenance Product Description Mode Res Weave Local Copy SpecificationsMode Scan Output Print Micro Dot Size Head Media Local copy Starting scan Edge Position 1st bit Scanning Area Scan areaDocument Document Paper feed direction Printable Area Print areaPrint Area Input data buffer Raster Graphics modePrinting Control codes Envelope Margin PaperPrintable Area for Envelopes Size Left Margin Right Margin Top Margin Bottom Margin Min 9 Ink Color Ink Cartridge Scanner AAS Safety, EMC Electrical specifications Common Resistance to electric noise Humidity % Temperature CEnvironmental conditions Reliability Parallel InterfacesPrinter Interface Interface Selection USB ConfigurationUSB Preventing Data Transfer TIME-OUT of Hosts Pin #2 Pin #1 Scanner interfaces IEEE1284.4 Protocol Element Description Scanner Configuration for USBUSB Control Panel 10. Power-on functions11. Special settings mode Buttons 100% B&W Normal Quality Reduce Button Enlarge Number Color Copy Button12. Copy button functions Warm up 13. Settings Menu LCD Indicators and LCD Display 14. LCD display and LED indicators 15. Initialization InitializationPrinter Initialization Scanner Initialization Settings Menu16. Settings Menu 17. Printer-SPECIFIC errors Stylus Scan ErrorsPRINTER-SPECIFIC Errors Menus Scanning SCANNER-SPECIFIC ErrorsOptions ADF Weight Physical CharacteristicsDimensions Page Operating Principles Motor Types and Corresponding Functions GeneralPrinter Mechanism Operation Motor Type Function For details Pump unit Printing MechanismPF motor CR guide shaft CR Motor PF roller PG lever Ink cartridge Nozzle selector BoardSensor Piezo unit Filter Ink course Piezo unit Cavity Ejecting State Printing ProcessNormal State Nozzles Phase drive Carriage Motor SpecificationsCR Motor Control for Each Mode Carriage Mechanism and Motor Unit Forward Platen GAP LeverMotor Normal Motor Control for Each Mode PF Motor Specifications Paper Feeding Mechanism Paper Feeding Mechanism Top View MULTI-FEED Prevention Mechanism Multiple Paper Loading Prevention Mechanism right side view Smaller TRAILING-EDGE Margin Method Carriage Lock Mechanism Power off sequencePower on sequence Paper eject sequence Paper PICK-UP Operation Combination 12.4,28 Eject roller transmission Gear Ink System Pump, Carriage Lock, Head Cleaner MechanismCarriage lock Lever Cleaner blade Pump roller Cap unit Pump Motor Rotation and Function Gear B Compression Spring Gear C Pump drive Roller Pump Mode Revolutions Absorption Pumping modes Cap Mechanism Scanner Principles Carriage Unit Carriage Operation 20. Carriage Movement Stylus Scan 2500 Local Copy Local and PC Copy PrinciplesLocal copy process Dpi Type Removal PC copy process PC Copy SettingsMode Setting Scan Res. dpi Print Res. dpi Media Normal PC copy Electrical Circuit Operating Principles Voltage Application Printer Scanner 1 B102 PSB/PSE BoardApplication of DC Voltage D89 D51 C51,C52 Power drop Power signalZD53 Switch Circuit Switch 2 B102 Main Board Transceiver 1284 I/FOption Unit Epson Stylus Scan Revision a Troubleshooting Unit Level Troubleshooting Printer Condition and Panel Stat us Flowchart Printer/Scanner does not operate at power onSymptoms and Problem s EndEnd Error is detectedFailure occurs during printing Printer does not feed paper correctly Control panel operation is abnormal Printer Related Troubleshooting Printer-Specific errors Symptom Condition Cause Check Point Solution Repair of the Printer Mechanis m Repair of the Printer Mechanism Epson Stylus Scan Revision a Epson Stylus Scan Revision a Service Level Troubleshooting Starts Here Scanner TroubleshootingUser-level Scanner-Specific errors Power problems Scanner does not initialize Carriage Unit does not operate 10. Carriage unit crashes into frame 11. The lamp does not light up 12. Poor image quality 13. Scsi Interface Error14. Parallel Interface Error 15. Option unit malfunction Sensor Name Location Signal Level Sensor Status Troubleshooting Motors and Sensors16. Motor Resistance and Measurement Procedure 17. Sensor Check Disassembly & Assembly Overview Make the specified adjustments when you When transporting the printer after installingAssembling or adjusting the printer When assembling, if an ink cartridge is removed Tools Specification for ScrewsScrew Characteristics Tool List Screw Types and Abbreviations Head Top Side Body Washer Assembled Category Component Item to check Is Check Required? Service Checks After RepairInspection Checklist for the Stylus Scan Epson Stylus Scan Revision a Disassembly Procedures Removing the Housing Removing the rear cover Remove three CBS 3x6 screws Removing the control panel assemblyRemoving the top cover Removing the side covers Removing the scanner support frame Removing the paper eject assembly Removing the power supply board upper frame Remove two screws On the left side Removal of the B102 PSB/PSE Board Cable protector Remove two Screws Removing the printer mechanism Remove three screws Remove two screws Remove one screw Removal of the Circuit Board Tray Remove four screws Removal of the Printer Consumables Removing the waste ink pads Spacer Waste ink tank Removing the cleaning assembly Pump Cap Disassembly and assembly When reassembling the cleaning assembly, refer toAssembly, be careful that the parts do not pop out during When assembling the printer, be careful not to crush nor Removing the Cap and Pump Assemblies Disassembling the Printer Mechanism Removing the Printhead Unit Fastener Head Nozzle Selector has been enclosed into head Removing the PF Motor Assembly Compression Spring Removing the CR Motor Assembly No.1 Removing the ASF Assembly Removing the ASF Assembly Disassembling the ASF Roller Assembly Epson standard color Hopper Assembly Brake Leveer Torsion SpringPaper Feed Roller Assembly Black Assembly Removing the Right and Left LD Roller AssemblyWhen installing the LD roller assembly, make sure That the hooks are hung on the paper feed Removing the Carriage Assembly 12. Removing the Carriage Assembly Removing the PF Roller Assembly Front Paper Guide B Eject Paper Roller Assembly PF Roller Assembly Removing the PE Paper Detector Assembly 16. Removing the PE Detector Assembly HP Detector Disassembly of the Scanner MechanismRemoving the HP Detector Remove two screws Removing the scannerRemoving the lamp Remove spring here Remove the FFC Removing the scanner power supply boardRemoving the scanner assembly from the scanner guide shaft Removing the scanner motor Frame as described in .7.1.3 above Adjustment List of Required Adjustments Required AdjustmentsList of Service Procedures That Require Adjustment Content of Operation Adjustment Procedure Printer hardware adjustments Printer AdjustmentAdjustment Tools Required Parallelism Adjustment Checking Parallelism Left Parallelism AdjustmentFixing Parallelism Adjustment Bushing Using the Service-Adjustment Program Installing the program Openning the Start-up menu Software-based Adjustment ProceduresService Menu Items Head ID Menu Adjustment Using the Service-Adjustment Program 118 Adjustment Using the Service-Adjustment Program 119 Production Menu Adjustment Using the Service-Adjustment Program 121 Bi-D Adjustment Initial Ink Charge Operation Head Cleaning Operation CL2 cleaning operation takes 60 seconds to complete Following patterns are printed Head Angular AdjustmentHead Voltage ID Input Sample of Head Angular Adjustment Pattern Printhead Securing screw Special Menu Scanner AdjustmentInk draining Maintenance Printer lubrication points CleaningLubrication Scanner lubrication points Lubrication Point s Standard Remarks Pag Maintenance Overview 131 Maintenance Overview 132 Gear 40.8 No.4 GEAR,8 Roller, Exit Two Pieces Maintenance Overview 135 Oil pad Lubricated side Faces out Carriage Assembly Bottom viewNever apply the oil exceeding 0.6cc No.3 Gear GEAR,8 No.6 No.7 No.10 No.8 No.9 Type Name Supply Specification Quantity Scanner Mechanism Appendix Connector Board Connector Summary Connector Pin Assignment Connector Pin Assignment-CN10 Connector Pin Assignment-CN8Connector Pin Assignment-CN9 10. Connector Pin Assignment-CN11 13. Connector Pin Assignment-CN1 11. Connector Pin Assignment-CN1212. Connector Pin Assignment-CN13 14. Connector Pin Assignment-CN15 Eeprom Address Map Address Explanation SettingSettings 15. Printer Unit Eeprom Address Map Appendix Eeprom Address Map 147 Appendix Eeprom Address Map 148 16. System Unit Eeprom Map Appendix Eeprom Address Map 150 Appendix Eeprom Address Map 151 Exploded Diagrams Appendix Exploded Diagrams 152 Epson Stylus Scan 2500 No.1 Epson Stylus Scan 2500 No.2 Epson Stylus Scan 2500 No.3 Epson Stylus Scan 2500 No.4 Epson Stylus Scan 2500 No.5 Epson Stylus Scan 2500 No.6 Rev.01 Epson Stylus Scan 2500 No.7 Epson Stylus Scan 2500 No.8 Packing Material for Epson Stylus Scan RefernceNumber Part Name Parts List17. Parts List Appendix Parts List 163 Appendix Parts List 164 Appendix Parts List 165 Appendix Parts List 166 Component Layouts Appendix Component Layouts 168 Appendix Component Layouts 169 Appendix Component Layouts 170 Appendix Component Layouts 171 Circuit Diagrams Page Page Page