Epson Photo750 manual 2 C259 Main Control Circuit, Major Elements, Location Function

Page 37

EPSON Stylus Photo 750

Revision A

2.2.2 C259 Main Control Circuit

Printer mechanism is controlled by C259 main board. The figure below shows the block diagram of C259 main control circuit.

 

CN3 USB

 

 

 

 

 

 

P-ROM

Cartridge Sensor

 

 

 

 

 

 

 

 

 

 

 

 

(IC3)

Head

 

 

CN9 HD FFC

 

CR Motor

 

 

 

 

D-RAM

 

Batt1

CR1

 

 

 

 

 

 

 

Q2&Q3

 

 

 

 

 

 

 

(IC4)

 

 

 

 

 

 

 

 

 

 

 

 

PF Motor

 

 

 

 

 

 

 

 

CN1 Parallel

 

Timer

Common

 

 

 

 

Counter

Driver

 

 

 

Buffer

 

(IC8)

(IC14)

 

CN7

 

 

 

 

 

 

 

 

(IC9)

 

 

 

 

 

CN8

 

 

 

EEPROM

 

 

 

M-ROM

 

 

Reset IC

Motor

 

 

 

(IC7)

 

(IC9)

Driver

Motor

(IC6)

 

 

 

 

 

 

 

 

(IC11)

Driver

 

 

 

 

 

 

 

 

 

 

 

 

 

(IC12)

 

E05B588

 

 

 

 

 

Motor

 

(IC2)

 

 

 

 

 

C90A05

 

 

 

 

 

Driver

 

 

 

 

 

 

(IC1)

 

 

 

 

 

 

(IC13)

 

Address

 

 

CN11

 

 

 

Data

 

 

 

 

 

 

 

 

 

 

C209 PNL

 

 

 

 

CN6

 

 

 

 

CN4

 

 

 

 

 

Transceiver

 

CN5

 

 

 

ASF Sensor

 

(IC9)

 

 

 

 

 

 

 

 

 

 

 

 

CN2 Mac. Serial

 

PE Sensor

 

HP Sensor

 

 

 

 

 

op04

 

 

 

 

 

 

 

Figure 2-4. Control Circuit Block Diagram

2.2.2.1 Major Elements

Major elements used in C259 main control circuit board are below.

Table 2-2. Major Elements

IC

 

Location

 

 

Function

 

 

 

 

 

CPU

 

 

 

16bit CPU mounted on the control circuit board

 

IC1

 

is driven by 24MHz clock frequency, and

C90A05CA

 

 

 

 

 

controls the whole printer.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

•

Motor control

 

 

 

 

•

Head voltage control

Gate Array

 

 

 

•

EEPROM control

 

IC2

 

•

Monitoring the sensor

E05B58**

 

 

 

 

 

•

Monitoring Timer IC

 

 

 

 

 

 

 

 

•

Mac,Serial I/F, running direction parallel I/F,

 

 

 

 

 

USB I/F control

 

 

 

 

Volume 4/8/16MB, Bus width 16 bit EEPROM

PROM

 

IC3

 

• Program or program +CG(k character

 

 

 

 

 

generator)

 

 

 

 

 

RAM

 

IC4

 

Bus width 16 bit, 4Mbit DRAM

 

 

 

 

 

Mask ROM

 

IC6

 

64Mbit Mask ROM

 

 

•

CG

 

 

 

 

 

 

 

 

 

 

 

 

 

1kBit EEPROM

AT93C46

 

IC7

 

•

Default Setting Value

 

 

 

 

• Back-up of various parameter

 

 

 

 

 

RTC-9810SA

 

IC8

 

Reset/Timer IC

 

 

 

 

 

 

74VHC161284

 

IC9

 

Transceiver IC

MEA

 

 

 

 

 

 

 

 

 

 

 

 

SN75LBC777

 

IC10

 

RS-422/423 Transceiver

 

 

 

 

 

LB1847

 

IC11

 

CR motor drive iC

 

 

 

 

 

A3956ALB

 

IC12,13

 

PF/PUMP Motor drive IC

 

 

 

 

 

CXA2099S

 

IC14

 

Head drive control HIC

 

 

• Generating head common voltage

 

 

 

 

 

 

 

 

 

 

Operating Principles

Operating Principles of Electric Circuit

32

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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 General Description Raster Graphics ModePrinting 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 Setting Position of Adjust Lever Adjust Lever SettingsPaper Lever position Adjustment Value EnvelopeEnvironmental Condition Environmental ConditionsBlack Ink Cartridge Ink CartridgeColor Ink Cartridge Safety Approvals Electric SpecificationInput Data Buffer ReliabilityPrinter Language and Emulation CE Marking14.1 ESC/P Control Codes „ 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 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 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 Setting20. Consumables Consumables and optionsClassification Name 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 CircuitEeprom Control Circuit Timer CircuitHead Drive 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 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 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 Tools PrecautionsName Supplier Parts No Phillips Screw Driver Check List Work Completion CheckClassifi Check Point Status Cation 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 AdjustmentPaper Gap Adjustment Adjustment„ Do not scratch special coated surface of the PF 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 Counter Value for Ink Absorber Protect Counter ResetProtect Counter Value Maintenance Service Maintenance Cleaning„ Never use chemical solvents, such as thinner, to „ 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
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