Power signal, From Main +3.3V +42V +5V, IC51 | Epson Scan 2500

EPSON Stylus Scan 2500

Revision A

SECONDARY SIDE

Power signal

from MAIN

+3.3V

+42V

+5V

board/power

ZD53

switch

+5V line over

IC51

voltage limitation

ZD91

+5V

regulator

IC151

+24V line over

voltage limitation

ZD52,87

+3.3V regulator

+42VDC line over

+24V

+12V

voltage limitation

+42V line constant

control

ZD51,ZD81-86

IC52

+24V line over

voltage limitation

ZD91

+24V

regulator

ZD42

IC53

+12V line over

voltage limitation

+12V

regulator

D88

Smoothing

circuit

D89 D51

C51,C52
C51,C52		Power drop
		Power drop
		delay circuit
		delay circuit		PC1

	C57,Q82,
	C57,Q82,

Q84	Photo coupler

Transformer (T1)
C11	Q1
Smoothing	Main		Feedback
circuit	switch-		circuit
			Q2,Q3,Q
Fuse	Filter circuit	Full wave	31,IC1
	Filter circuit	rectifier circuit
		rectifier circuit

AC input

F1	L1, R1,	DB1
	C1-4

PRIMARY SIDE

Figure 2-22. B101 PSB/PSE Board Block Diagram

Operating Principles

Electrical Circuit Operating Principles

56

Image 56

Epson Scan 2500 Power signal, From Main +3.3V +42V +5V, ZD53 Switch, IC51, ZD91, IC151, ZD52,87, +24V +12V, IC52, AC input

Contents

Epson Stylus Scan Epson Stylus Scan Revision a Precautions Preface Issued Date Revision StatusRevision Description Epson Stylus Scan Revision a Contents Maintenance Product Description Local Copy Specifications Mode Scan Output Print Micro Dot Size Head MediaMode Res Weave Local copy Scan area DocumentStarting scan Edge Position 1st bit Scanning Area Document Paper feed direction Printable Area Print areaPrint Area Raster Graphics mode PrintingInput data buffer Control codes Paper Printable Area for EnvelopesEnvelope Margin Size Left Margin Right Margin Top Margin Bottom Margin Min 9 Ink Color Ink Cartridge Scanner AAS Safety, EMC Electrical specifications Common Humidity % Temperature C Environmental conditionsResistance to electric noise Reliability Parallel InterfacesPrinter Interface USB Configuration USB Preventing Data Transfer TIME-OUT of HostsInterface Selection Pin #2 Pin #1 Scanner interfaces IEEE1284.4 Protocol Element Description Scanner Configuration for USBUSB 10. Power-on functions 11. Special settings modeControl Panel Buttons Copy Button 12. Copy button functions100% B&W Normal Quality Reduce Button Enlarge Number Color 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 Stylus Scan Errors PRINTER-SPECIFIC Errors17. Printer-SPECIFIC errors Menus SCANNER-SPECIFIC Errors OptionsScanning ADF Weight Physical CharacteristicsDimensions Page Operating Principles General Printer Mechanism OperationMotor Types and Corresponding Functions Motor Type Function For details Printing Mechanism PF motorPump unit CR guide shaft CR Motor PF roller PG lever Nozzle selector Board SensorInk cartridge Piezo unit Filter Printing Process Normal StateInk course Piezo unit Cavity Ejecting State Nozzles Carriage Motor Specifications CR Motor Control for Each ModePhase drive Carriage Mechanism and Motor Platen GAP Lever MotorUnit Forward 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 Power off sequence Power on sequenceCarriage Lock Mechanism Paper eject sequence Paper PICK-UP Operation Combination 12.4,28 Eject roller transmission Gear Pump, Carriage Lock, Head Cleaner Mechanism Carriage lock Lever Cleaner bladeInk System 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 Local and PC Copy Principles Local copy processStylus Scan 2500 Local Copy Dpi Type Removal PC Copy Settings Mode Setting Scan Res. dpi Print Res. dpi MediaPC copy process Normal PC copy Electrical Circuit Operating Principles Voltage Application Printer Scanner 1 B102 PSB/PSE BoardApplication of DC Voltage Power signal ZD53 SwitchD89 D51 C51,C52 Power drop Circuit Switch 2 B102 Main Board 1284 I/F OptionTransceiver 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 Scanner Troubleshooting User-level Scanner-Specific errorsService Level Troubleshooting Starts Here Power problems Scanner does not initialize Carriage Unit does not operate 10. Carriage unit crashes into frame 11. The lamp does not light up 13. Scsi Interface Error 14. Parallel Interface Error12. Poor image quality 15. Option unit malfunction Troubleshooting Motors and Sensors 16. Motor Resistance and Measurement ProcedureSensor Name Location Signal Level Sensor Status 17. Sensor Check Disassembly & Assembly Overview When transporting the printer after installing Assembling or adjusting the printerMake the specified adjustments when you When assembling, if an ink cartridge is removed Specification for Screws Screw CharacteristicsTools 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 When reassembling the cleaning assembly, refer to Assembly, be careful that the parts do not pop out duringDisassembly and assembly 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 Hopper Assembly Brake Leveer Torsion Spring Paper Feed Roller AssemblyEpson standard color Black Removing the Right and Left LD Roller Assembly When installing the LD roller assembly, make sureAssembly 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 Required Adjustments List of Service Procedures That Require AdjustmentList of Required Adjustments Content of Operation Adjustment Procedure Printer Adjustment Adjustment Tools RequiredPrinter hardware adjustments Parallelism Adjustment Checking Parallelism Left Parallelism AdjustmentFixing Parallelism Adjustment Bushing Using the Service-Adjustment Program Installing the program Software-based Adjustment Procedures Service Menu ItemsOpenning the Start-up menu 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 Cleaning LubricationPrinter lubrication points 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-CN8 Connector Pin Assignment-CN9Connector Pin Assignment-CN10 10. Connector Pin Assignment-CN11 11. Connector Pin Assignment-CN12 12. Connector Pin Assignment-CN1313. Connector Pin Assignment-CN1 14. Connector Pin Assignment-CN15 Address Explanation Setting SettingsEeprom Address Map 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