Epson Photo750 manual Timer Circuit, Eeprom Control Circuit, Head Drive Circuit

Page 40

EPSON Stylus Photo 750

Revision A

2.2.2.4 Timer Circuit

The timer of this printer uses reset/timer IC(IC8). The timer keeps record of how long the printer is OFF and uses it information to judge it the initial cleaning should be performed or not when the power it turned ON next time. The data in the IC is backed up by the lithium battery.

2.2.2.5 EEPROM Control Circuit

This printer uses non-volatile memory EEPROM(IC7). When turning the power ON, EEPROM outputs data to the gate array(IC2) and records the data when turning the power OFF. The data which EEPROM will record are followings;

„Ink Consumption Counter (black/color)

„Frequency of Cleaning

„Destination Data

„CPSI Pass Word

„Other various setting values

+5V

 

 

 

AT93C46

 

 

E05B58**

 

8

(IC7)

 

1

206

(IC2)

 

Vcc

CS

 

 

EECS

 

 

 

 

 

 

6

ORG

SK

2

205

 

 

 

 

EECK

 

 

 

5

204

 

GND

DI

3

 

 

EECO

 

 

 

203

 

 

 

 

 

DO

4

 

 

 

 

 

EECI

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

op07

Figure 2-7. EEPROM Control Circuit

2.2.2.6 Head Drive Circuit

Head drive circuit of this printer consists of the following circuits.

†Driven voltage wave form circuit

This circuit consists of HIC(IC14) and terminal transistor, and generates drive wave which will be charged to each PZT.

 

 

 

 

+42

 

 

 

 

 

 

F1

 

 

CXA20996(IC14)

 

 

CN9

 

 

VCC45

22

 

27

VHV

 

 

 

 

A0

 

23

 

26

Vcc45_2

 

 

 

A1

 

NPNB 20

 

25

COM

A2

 

FB

18

 

COM

A3

 

PNPB

16

 

24

COM

CLK1

 

 

 

23

 

 

 

+5

 

COM

CLK2

 

 

 

 

/FLOOR

VCC5

24

 

 

 

 

 

 

 

/RST

 

 

 

 

 

 

DATA

 

 

 

 

22

GND2

DCLK

 

 

 

 

21

 

 

 

 

 

/E

 

 

 

 

GND2

 

 

 

 

 

VOUTGND 14

 

20

GND2

 

 

 

 

 

19

 

 

 

 

 

GND2

E05B58**(IC2)

 

 

 

 

 

 

 

HWA0

 

SWC0 190

1

BCO

 

 

SWC1

189

2

CCO

 

HWA1

 

184

5

 

 

 

 

 

HWA2

 

HLAT

LAT

 

HWA3

HNCHG

173

16

NCHG

HWCLK1

174

14

HWCLK2

 

HCLK

CLK

 

/HWFLR

 

IECLK

175

 

 

 

/HWRST

 

176

12

 

 

 

HSI1

SI1

 

HWSDATA

177

11

 

HWSCLK

 

HSI2

SI2

 

/HWSLAT

 

178

10

 

 

HSI3

 

 

 

 

SI3

 

 

 

 

 

 

 

 

HSI4

179

9

SI4

 

 

 

180

8

 

 

 

HSI5

SI5

 

 

 

181

7

 

 

 

HSI6

SI6

 

 

 

 

 

 

 

 

 

 

3

THM

 

 

 

 

 

 

 

TMP95C061(IC1)

 

+5

 

 

AN0 105

18

GND

 

 

 

 

17

 

 

 

 

 

GND

 

 

 

 

 

15

 

 

 

 

 

GND

 

 

 

 

 

13

 

 

 

 

 

GND

 

 

 

 

 

6

 

 

 

 

 

GND

 

 

 

 

 

4

 

 

 

 

 

GND

 

 

 

 

 

 

 

op08

Figure 2-8. Common Drive Circuit

Operating Principles

Operating Principles of Electric Circuit

35

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Contents 659,&#0$18$ General Notice Precautions About This Manual Revision Status Table of Contents Maintenance Product Description Overview General Characteristics„ Holds 10 transparency films Raster Graphics Mode General DescriptionPrinting Printing SpeedPaper Feeding Paper Specification„ No curled, wrinkled, scuffing or torn paper be used Paper Left Right Top Bottom Printable AreaWidth Length Margin Typ Min Adjust Lever Settings Setting Position of Adjust LeverPaper Lever position Adjustment Value EnvelopeEnvironmental Conditions Environmental ConditionBlack Ink Cartridge Ink CartridgeColor Ink Cartridge Electric Specification Safety ApprovalsInput Data Buffer ReliabilityPrinter Language and Emulation CE Marking14.1 ESC/P Control Codes „ Dot size control ESC e „ Raster header ESC D „ Raster body Connector pin assignment and signals Parallel InterfaceParallel InterfaceForward channel Parallel I/FPin Signal Return In/Out Function Description Name GND pin Parallel InterfaceReverse channelConnect pin assignment and signals Xflag OutParallel I/F Mode Typical time of tack 10. Typical Time of Tack12. Connector pin assignment and signals Serial Interface11. Serial interface 13. X-ON/X-OFF, DTR protocolPin Signal Name Out Function Description 14. Connector pin assignment and signalsUSBUniversal Serial Bus Interface Interface selection Prevention of data transfer time-out on HostIeee 1284.4 protocol Bi-directional Command SwitchesFunction Control CodeSpecial Setting Mode 18. Special setting modeLED Indications 17. Status printingErrors Indicators19. Printer Status displayed on the control panel Ink Out Paper Out Priority Black Color„ When you need to perform test print after the repair InitializationInitialization Setting Physical Specification20. Consumables Consumables and optionsClassification Name Operating Principles Printer Mechanism Printer MechanismEpson Stylus Photo Revision a 1 C257 PSB Power Supply Circuit Operating Principles of Electric CircuitOutput Voltage Voltage UsageTRANST1 2 C259 Main Control Circuit Major ElementsMajor Elements Location FunctionReset Circuit Reset CircuitSensor Circuit Sensor CircuitEeprom Control Circuit Timer CircuitHead Drive Circuit Paper Feed Pump Motor PF/Pump Motor Drive Circuit Paper Feed Pump Motor Drive CircuitCarriage MotorCR Motor Drive Circuit 10. Carriage Motor Drive CircuitTroubleshooting Check Point Signal Level Switch Mode Sensor Check PointMotor, Coil Resistance Motor Location Check Point ResistanceLED Indication Condition Remedy Error IndicationPaper Ink End Check Black Color Symptoms and Corresponding Flow Chart Unit Level TroubleshootingSymptom Cause 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 Repair of the Power Supply Board Unit Repair Power Supply BoardSympto Condition Cause Check point Solution Repair of the Control Board Repair of the Control BoardEpson Stylus Photo Revision a Symptom Condition Cause Check Point Solution Unit Repair Printer Mechanism10. Repair of the Printer Mechanism 11. Repair of the Printer Mechanism12. Repair of the Printing Mechanism 13. Repair of the Printing Mechanism14. Repair of the Printer Mechanism 15. Repair of the Printer MechanismDisassembly and Assembly Tools PrecautionsName Supplier Parts No Phillips Screw Driver Check List Work Completion CheckClassifi Check Point Status Cation Disassembly Flowchart below shows step-by step disassembly proceduresHousing Removal Housing RemovalCircuit Boards Removal Shield Plate, M/B RemovalE P O Control Panel Removal Control Panel RemovalAbsorber Tray, AssemblyA Removal Absorber Tray, AssemblyA RemovalPrinter Mechanism Removal Print Head RemovalE „ Be sure that the grounding plate is installed to Print Head InstallationPump, Assembly/Cap, Assembly Removal „ Be careful not to damage the rubber part of the cap11. Ink Tube Motor, Assembly, CR Removal Bi-D adjustment. See Bi-D Adjustment onMotor Assembly PF Removal 15. Motor, Assembly, PF Installation5.5 ASF, Assembly Removal Paper Feed Roller Assembly Removal E „ When removing or installing the HopperRoller Assembly, LD Left/Right Removal 18. Roller Assembly, LD RemovalCarriage Assembly Removal 19. Bush Parallel Adjust Removal20. Carriage Assembly Removal PE Sensor Assembly Removal 21. PE Sensor Assembly RemovalRoller, Assembly, PF Removal 23. Roller, Assembly, Paper Exit Removal24. Roller, Assembly, PF Removal HP Sensor Removal 25. HP Sensor RemovalCartridge SensorSensor, I/C Removal 26. Bush Holder, Sensor, I/C Removal29. Sensor, I/C Removal Adjustment Required Adjustment Required AdjustmentPaper Gap Adjustment Adjustment„ Do not scratch special coated surface of the PF Epson Stylus Photo Revision B Adjustment by Adjustment Program 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 Head Angular Adjustment Screw position for fixing the print headMagnetized condition when the printer has been left Adjustment, the following screen will be appearedU Preventing from the CR motor fall into the non Alone more then 5 minutes in the Head AngulerBi-D Adjustment Bi-D Adjustment Pattern SampleHead Cleaning Initial Ink Charge Counter Value for Ink Absorber Protect Counter ResetProtect Counter Value Maintenance Service Maintenance Cleaning„ Never use chemical solvents, such as thinner, to Lubrication „ Never use oil and the grease other than thoseLubrication 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 Connector Summary for C259MainConnector CN4 Major Component UnitConnector CN5 Connector CN6Connector CN7 Connector CN8Connector CN10 10. Connector CN11Component Layout C259 Main Component LayoutAppendix Component Layout 101 Exploded Diagram Exploded Diagram-1Exploded Diagram for Epson Stylus Photo 750 2/3 Exploded Diagram for Epson Stylus Photo 750 3/3 Electric Circuit Page Page
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