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Epson Stylus Photo 750 Service Manual

Color inkjet printer
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Color Inkjet Printer
EPSON Stylus Photo 750
®
SEIJ98005

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Summary of Contents for Epson Stylus Photo 750

  • Page 1 6(59,&( 0$18$/ 6(59,&( 0$18$/ 6(59,&( 0$18$/ 6(59,&( 0$18$/ Color Inkjet Printer EPSON Stylus Photo 750 ® SEIJ98005...
  • Page 2 SEIKO EPSON CORPORATION. † All effort have been made to ensure the accuracy of the contents of this manual. However, should any errors be detected, SEIKO EPSON would greatly appreciate being informed of them.
  • Page 3 2. MAKE CERTAIN THAT THE SOURCE VOLTAGES IS THE SAME AS THE RATED VOLTAGE, LISTED ON THE SERIAL NUMBER/ RATING PLATE. IF THE EPSON PRODUCT HAS A PRIMARY AC RATING DIFFERENT FROM AVAILABLE POWER SOURCE, DO NOT CONNECT IT TO THE POWER SOURCE.

  • Page 4: About This Manual

    About This Manual This manual describes basic functions, theory of electrical and mechanical operations, maintenance and repair procedures of EPSON Stylus Photo 750. The instructions and procedures included herein are intended for the experienced repair technicians, and attention should be given to the precautions on the preceding page.
  • Page 5 Revision Status Revision Issued Date Description Rev. A December 14, 1998 First Release...

  • Page 6: Table Of Contents

    Stylus Photo 750 Revision A Table of Contents Product Description Consumables and options............... 26 Overview......................4 Operating Principles General Characteristics................4 Overview ...................... 28 General Description..................5 Printer Mechanism .................. 28 Printing ...................... 5 Paper Feeding................... 6 Operating Principles of Electric Circuit ............30 Paper Specification ...................
  • Page 7 Stylus Photo 750 Revision A Paper Gap Adjustment ................78 Adjustment by Adjustment Program ............. 80 Adjustment Program................80 Setting Destination Information ............... 82 Head Voltage ID Adjustment ..............83 Head Angular Adjustment ............... 84 Bi-D Adjustment ..................86 Head Cleaning..................87 Initial Ink Charge ..................

  • Page 8: Product Description

    & + $ 3 7 ( 5 PRODUCT DESCRIPTION...

  • Page 9: Overview

    EPSON Stylus Photo 750 Revision A 1.1 Overview This printer has better mechanism for the print quality and paper feeding than that of Stylus Photo and Stylus Photo 700. It also uses new print head and improved printing speed and through put.

  • Page 10: General Description

    EPSON Stylus Photo 750 Revision A 1.2 General Description PRINTING SPEED AND PRINTABLE COLUMNS † Character mode 1.2.1 Printing Table 1-1. Printing Speed PRINTING METHOD Character Pitch Printable columns LQ speed † On demand ink jet 10 CPI (Pica) 200CPS**...

  • Page 11: Paper Feeding

    „ Thickness: 0.08mm(0.003”)-0.11mm(0.004”) TYPEFACE „ Weight: 64g/m (17lb.) - 90g/m (24lb) † Bin map LQ font: EPSON Courier, 10 CPI „ Quality: Exclusive paper, Bond paper, PPC 1.2.2 Paper Feeding † Transparency and Glossy Paper † Feeding Method: Friction feed with ASF „...

  • Page 12: Printable Area

    EPSON Stylus Photo 750 Revision A 1.2.4 Printable Area † Cut Sheet Table 1-3. Printable Area Paper Paper Left Right Bottom The figure below shows printable area. Paper Size Width Length Margin Margin Margin Margin (typ) (typ.) (min.) (min.) (min.) (min.)

  • Page 13: Adjust Lever Settings

    EPSON Stylus Photo 750 Revision A † Envelope 1.2.5 Adjust Lever Settings Table 1-4. Envelope The adjust lever located under the printer cover(right side) needs to be set for the proper paper setting according to the paper type. LM(Left RM(RIght...

  • Page 14: Environmental Conditions

    EPSON Stylus Photo 750 Revision A † Resistance to shock: 1.2.6 Environmental Conditions † Temperature: „ Operating: 1G, within 1ms „ Operating: „ Non-operating: 10 to 35 C(*3) 2G, within 2ms(*1) „ Non-operating: † Resistance to vibration: -20 to 60 C(*1) „...

  • Page 15: Ink Cartridge

    EPSON Stylus Photo 750 Revision A 1.2.7 Ink Cartridge 1.2.7.2 Color Ink Cartridge † Type: Exclusive cartridge 1.2.7.1 Black Ink Cartridge † Color: Magenta, Cyan, Yellow, Light Magenta, Light Cyan † Type: Exclusive cartridge † Print capacity: 220 pages/A4 (360 dpi, 5% duty each color) †...

  • Page 16: Input Data Buffer

    EPSON Stylus Photo 750 Revision A „ Insulation Resistance:10 M ohms min. (between AC line and 1.2.8 Input Data Buffer chassis, DC 500V) † Buffer: 256 Kbytes „ Dielectric: AC 1500 V rms. 1 minute (between AC line and chassis) 1.2.9 Electric Specification...

  • Page 17: Ce Marking

    EPSON Stylus Photo 750 Revision A 1.2.13 CE Marking < Graphic Mode > † 220-240 V version † General operation: „ Low Voltage Directive 73/23/EEC:EN60950 „ Initialize Printer: ESC @ „ EMC Directive 89/336/EEC: „ Unidentical Printing: ESC U EN55022 Class B EN61000-3-2 „...
  • Page 18 EPSON Stylus Photo 750 Revision A „ Dot size control: ESC (e „ Raster header: ESC (D „ Raster body: ESC i † Color: „ Printing Color: ESC r, ESC (r † EEPROM control: „ EEPROM control: ESC Product Description...

  • Page 19: Parallel Interface

    EPSON Stylus Photo 750 Revision A 1.3 Parallel Interface ERROR signal is at low level when the printer is in one of the following states. -Printer hardware error (fatal error) This printer has IEEE-1284 parallel interface, RS-423 serial interface -Paper-out error and USB interface as standard.

  • Page 20: Parallel Interface(Reverse Channel)

    EPSON Stylus Photo 750 Revision A 1.3.2 Parallel Interface(Reverse channel) Pin. Signal Return In/Out Function Description Name GND pin Reverse channel is used to transfer the information data from the printer Logic H Pulled up to +5V via 3.9K ohm resistor.
  • Page 21 EPSON Stylus Photo 750 Revision A „ When IEEE1284.4 protocol is NOT effective: [00H] [57H] Table 1-9. Connect pin assignment and signals MFG:EPSON; CMD:ESCPL2,BDC; Pin. Signal Return In/Out Function Description Name GND pin MDL:Stylus[SP]Photo[SP]750; CLS:PRINTER; HostClk Host clock signal. DES:EPSON[SP]Stylus[SP]Photo[SP]750;...
  • Page 22 EPSON Stylus Photo 750 Revision A NOTE: Following lists “Notes” when using the parallel interface. The figure below shows the timing chart of the parallel interface. 1. “Return GND pin” in the table means twist pair return and is connected to the signal GND level.

  • Page 23: Serial Interface

    EPSON Stylus Photo 750 Revision A 1.3.3 Serial Interface Following figure shows port arrangement of serial I/F connector. This section shows specification for serial interface I/F. Table 1-11. Serial interface Item Specification Standard Based on RS-423 Synchronization Synchronous Bit rate Approx.

  • Page 24: Usb(Universal Serial Bus) Interface

    EPSON Stylus Photo 750 Revision A 1.3.4 USB(Universal Serial Bus) Interface Following shows specification. † Standard: Based on „ Universal Serial Bus Specifications Revision 1.0 „ Universal Serial Bus Device Class Definition for Printing Devices version 1.0 † Bit rate: 12Mbyte(Full Speed Device) †...

  • Page 25: Prevention Of Data Transfer Time-Out On The Host

    EPSON Stylus Photo 750 Revision A 1.3.5 Prevention of data transfer time-out on the 1.3.7 IEEE 1284.4 protocol host The packet protocol described by IEEE1284. 4 is supported on the Generally, hosts abandon data transfer to peripherals when a peripheral parallel I/F and USB I/F.

  • Page 26: Function

    EPSON Stylus Photo 750 Revision A 1.4 Function 1.4.3.1 Switches Since this printer does not have so many switches, each button has 1.4.1 Control Code several functions. The tables below show their functions and how to enter those functions for each switch.

  • Page 27: Special Setting Mode

    EPSON Stylus Photo 750 Revision A NOTE: *Waste ink counter value and Timer IC counter value are *1(from the previous page): According to the content of 35H of EEPROM, one of the following actions is carried out. initialized. Table 1-17. Status printing 1.4.5 LED Indications...

  • Page 28: Errors

    EPSON Stylus Photo 750 Revision A 1.4.6 Errors Table 1-19. Printer Status displayed on the control panel Indicators In this printer, when the following conditions are detected. the printer Printer Status Ink Out Ink Out goes to the error condition, sets ERROR signal Low and BUSY signal...

  • Page 29: Initialization

    EPSON Stylus Photo 750 Revision A † No Ink Cartridge 1.4.7 Initialization When the printer detects that ink-cartridge comes off, it becomes There are 3 types of initialization. “No ink cartridge error” condition. † Power-on Initialization „ When you need to perform test print after the repair This printer initializes itself when it is turned on, or when it service, performing the status-printing(see “Control...

  • Page 30: Initialization Setting

    EPSON Stylus Photo 750 Revision A 1.4.8 Initialization Setting 1.4.9 Physical Specification † Weight: 5.2Kg This printer initializes following settings as initialization setting when the initialization is performed. Also, among the items of panel setting, † Dimensions: 429 mm(W) x 260.9 mm(D) x 167.1 mm (H) (without...

  • Page 31: Consumables And Options

    EPSON Stylus Photo 750 Revision A 1.4.10 Consumables and options The consumables and options for this printe are following; Table 1-20. Consumables Classification Name IC1BK02 Ink Cartridge(black) Consumables IC5CL02 Ink Cartridge(color) Product Description Function...

  • Page 32: Operating Principles

    & + $ 3 7 ( 5 OPERATING PRINCIPLES...

  • Page 33: Overview

    EPSON Stylus Photo 750 Revision A † Print Head 2.1 Overview Each color 120 DPI, 48 nozzle x 6 colors(Black, Cyan, Light Cyan, Magenta, Light Magenta, Yellow). Head is mounted at the carriage This section describes operating principles of the printer mechanism mechanism.
  • Page 34 EPSON Stylus Photo 750 Revision A † Pump Mechanism This mechanism consists of Pump and Cap parts. „ Cap Parts This protects the surface of print head nozzle from being dry or from being attached with dust. „ Pump Parts...

  • Page 35: Operating Principles Of Electric Circuit

    EPSON Stylus Photo 750 Revision A 2.2 Operating Principles of Electric Circuit 2.2.1 C257 PSB Power Supply Circuit The power supply circuit in the printer uses RCC(Ringing Choke The electric circuit of this printer consists of the following circuits. Converter) circuit method, and generates and outputs 2 types of †...
  • Page 36 EPSON Stylus Photo 750 Revision A † +42V Line Constant Voltage Control Circuit: The output level of the +42V line is monitored by a detection circuit consisting of seven Zener diodes.This circuit prevents from dropping for constant output voltage. PSC Signal...

  • Page 37: C259 Main Control Circuit

    EPSON Stylus Photo 750 Revision A 2.2.2 C259 Main Control Circuit 2.2.2.1 Major Elements Major elements used in C259 main control circuit board are below. Printer mechanism is controlled by C259 main board. The figure below shows the block diagram of C259 main control circuit.
  • Page 38 EPSON Stylus Photo 750 Revision A 2.2.2.2 Reset Circuit Reset circuit consists of reset/timer IC(IC8) and peripheral elements. The reset/timer IC prevents the CPU from running away, which is caused by the unstable voltage(+5VDC line voltage is less than +4.3V) in the logic line during the power ON/OFF operation.
  • Page 39 EPSON Stylus Photo 750 Revision A 2.2.2.3 Sensor Circuit The following sensor circuits are mounted on the C259 Main Control Circuit. † HP Sensor ASFV IC 2 HP sensor uses the photo interrupter method. A HP sensor detects E05B58** the carriage home position. It is used for managing printing position SWA0 and cleaning, etc.
  • Page 40 EPSON Stylus Photo 750 Revision A 2.2.2.4 Timer Circuit 2.2.2.6 Head Drive Circuit The timer of this printer uses reset/timer IC(IC8). The timer keeps Head drive circuit of this printer consists of the following circuits. record of how long the printer is OFF and uses it information to judge it †...
  • Page 41 EPSON Stylus Photo 750 Revision A † Driver on the head 2.2.2.7 Paper Feed (Pump) Motor (PF/Pump Motor) Drive Circuit The driver on the head is Nozzle-selector drive circuit. Each drive waveform generated in the drive voltage wave form circuit is IC12 and IC13 on the control circuit board drive PF/PUMP motor.
  • Page 42 EPSON Stylus Photo 750 Revision A 2.2.2.8 Carriage Motor(CR Motor) Drive Circuit CR motor is driven by IC11 mounted on the C259 main control board. 4-phase 200-pole Hybrid type stepping motor is used as a CR Motor and is driven by bi-pola constant drive control.

  • Page 43: Troubleshooting

    & + $ 3 7 ( 5 TROUBLESHOOTING...

  • Page 44: Overview

    EPSON Stylus Photo 750 Revision A 3.1 Overview Table 3-2. Sensor Check Point This section describes how to identify and troubleshoot the problems Sensor Name Check Point Signal Level Switch Mode when repairing the printer by dividing the troubles into two levels; repair...
  • Page 45 EPSON Stylus Photo 750 Revision A Table 3-3. Error Indication LED Indication Condition Remedy Paper Ink End Ink End Power Check (Black) (Color) No Paper Set papers Removed the jammed Paper Jam Blink paper Close the cartridge cover correctly or...

  • Page 46: Unit Level Troubleshooting

    EPSON Stylus Photo 750 Revision A 3.2 Unit Level Troubleshooting 1. Printer does not operate. This section contains the flow charts which are used to isolate the faulty unit by following the flow chart according to the problem caused during replacing or repairing the unit.
  • Page 47 EPSON Stylus Photo 750 Revision A 2. Error is detected. 3. Abnormal printing operation Figure 3-3. Flowchart 2 Figure 3-4. Flowchart 3 Troubleshooting Unit Level Troubleshooting...
  • Page 48 EPSON Stylus Photo 750 Revision A 4. Paper feed operation is not performed correctly 5. Abnormal Control Panel Figure 3-5. Flowchart 4 Figure 3-6. Flowchart 5 Troubleshooting Unit Level Troubleshooting...

  • Page 49: Unit Repair (Power Supply Board)

    EPSON Stylus Photo 750 Revision A 3.3 Unit Repair (Power Supply Board) This section describes the problems related to the power supply board. The table below provides various symptoms, likely causes, and checkpoints. The checkpoints refer to waveforms, resistance, and other values to check to evaluate the operation of each component.

  • Page 50: Repair Of The Control Board

    EPSON Stylus Photo 750 Revision A 3.4 Repair of the Control Board This section describes the problems related to the power supply board. The table below provides various symptoms, likely causes, and checkpoints. The checkpoints refer to waveforms, resistance, and other values to check to evaluate the operation of each component.
  • Page 51 EPSON Stylus Photo 750 Revision A Table 3-9. Repair of the Control Board Sympto Condition Cause Check point Solution Check the signal waveform of DATA(Pin 29) of IC14 and Common NPNB/PNPB(Pin 16/19). If DATA is not Abnormal IC12 is input, printing broken.

  • Page 52: Unit Repair (Printer Mechanism)

    EPSON Stylus Photo 750 Revision A 3.5 Unit Repair (Printer Mechanism) Table 3-11. Repair of the Printer Mechanism This section provides instruction for repairing mechanism. It describes Symptom Condition Cause Check Point Solution various problems, symptom, likely causes, checkpoints, and solutions.
  • Page 53 EPSON Stylus Photo 750 Revision A Table 3-12. Repair of the Printing Mechanism Table 3-13. Repair of the Printing Mechanism Symptom Condition Cause Check Point Solution Symptom Condition Cause Check Point Solution Check visually if Print head Perform cleaning Head FFC is...
  • Page 54 EPSON Stylus Photo 750 Revision A Table 3-14. Repair of the Printer Mechanism Table 3-15. Repair of the Printer Mechanism Symptom Condition Cause Check Point Solution Symptom Condition Cause Check Point Solution A vertical Bi-directional Replace the Paper is Perform Bi-D...

  • Page 55: Disassembly And Assembly

    & + $ 3 7 ( 5 DISASSEMBLY AND ASSEMBLY...

  • Page 56: Overview

    Risque d’explosion si la pile est remplacée This section describes procedures for disassembling the main components of EPSON Stylus Photo750. Unless otherwise specified, incorrectment. Ne remplacer que par une pile du même disassembly units or components can be reassembled by reversing the type ou d’un type équivalent recommandé...

  • Page 57: Work Completion Check

    EPSON Stylus Photo 750 Revision A 4.1.3 Work Completion Check If any service is made to the printer, use the checklist shown below, to Table 4-3. Check List confirm that all works are completed properly and the printer is ready to...

  • Page 58: Disassembly

    EPSON Stylus Photo 750 Revision A 4.2 Disassembly The flowchart below shows step-by step disassembly procedures. Figure 4-1. Flowchart Disassembly and Assembly Disassembly...

  • Page 59: Housing Removal

    EPSON Stylus Photo 750 Revision A 4.2.1 Housing Removal Since this printer has no lower housing, the printer mechanism is exposed just by removing the upper housing. 1. Open the printer cover and set the PG adjust lever on the right-hand side to (+) position.

  • Page 60: Circuit Boards Removal

    EPSON Stylus Photo 750 Revision A 4.2.2 Circuit Boards Removal 5. Fully separate “Shield Plate, M/B” from the printer mechanism. Refer to “Check Point” and “Adjustment Required” on the next page. 6. When removing each board unit from “Shield Plate, M/B”, remove each screw securing the each board (C259Main: 10 screws, 1.
  • Page 61 EPSON Stylus Photo 750 Revision A Unlock the connector CN6 and CN7 before disconnecting them. Also, be sure to lock them when reconnecting them. After replacing C259 Main Board, perform the following adjustments. 1. Head ID Writing (See “Head Voltage ID Adjustment”...

  • Page 62: Control Panel Removal

    EPSON Stylus Photo 750 Revision A 4.2.3 Control Panel Removal 1. Remove the upper housing.(See“Housing Removal” on page -54) 2. Remove 2 screws securing the control panel, then remove the control panel from the printer mechanism. 3. Remove one screw securing the “Housing, Panel, Left” to the printer mechanism.

  • Page 63: Absorber Tray, Assembly;A Removal

    EPSON Stylus Photo 750 Revision A 4.2.4 Absorber Tray, Assembly;A Removal 1. Remove the upper housing.(See “Housing Removal” on page -54) 2. Remove the control panel. (See “Control Panel Removal” on page -57) 3. Remove one screw securing the “Absorber Tray, Assembly;A” to the right side of the printer mechanism.

  • Page 64: Printer Mechanism Removal

    EPSON Stylus Photo 750 Revision A 4.2.5 Printer Mechanism Removal 4.2.5.1 Print Head Removal 1. Remove the upper housing.(See “Housing Removal” on page -54) 2. Rotate “Gear, 67.2” toward the front side of the printer and release the carriage lock mechanism. Then, move the carriage assembly to the left side.

  • Page 65: Adjustment

    EPSON Stylus Photo 750 Revision A „ Install the new cartridge before sending the printer „ Be sure that the grounding plate is installed to the back to the user, since the ink cartridge once taken carriage correctly. (There are 2 fixing pins on the out can not be used again.
  • Page 66 EPSON Stylus Photo 750 Revision A 4.2.5.2 Pump, Assembly/Cap, Assembly Removal 1. Remove the upper housing. (See “Housing Removal” on page -54) 2. Remove the control panel. (See “Control Panel Removal” on page -57) 3. Remove “Absorber Tray, Assembly;A” (See “Absorber Tray, Assembly;A Removal”...
  • Page 67 EPSON Stylus Photo 750 Revision A „ Since there is a spring inside the pump assembly, be careful of the spring popping out. „ When assembling, be careful not to pinch or give pressure to the ink tube, which is connected between “Pump, Assembly”...

  • Page 68: Adjustment

    EPSON Stylus Photo 750 Revision A 4.2.5.3 Motor, Assembly, CR Removal 1. Remove the upper housing.(See “Housing Removal” on page -54) 2. Rotate “Gear, 67.2” toward the front of the printer and disengage the “Carriage Lock Mechanism”. Then, move the carriage to the center of the platen.
  • Page 69 EPSON Stylus Photo 750 Revision A 4.2.5.4 Motor Assembly PF Removal 4. Remove the hexagon nut and ”Motor, Assembly, PF”. „ When removing the “Motor, Assembly, PF”, first, 1. Remove the upper housing.(See “Housing Removal” on page -54) slightly pull out the “Motor, Assembly, PF” from the 2.
  • Page 70 EPSON Stylus Photo 750 Revision A 4.2.5.5 ASF, Assembly Removal 1. Remove the upper housing.(See “Housing Removal” on page -54) 2. Release the hook and remove “Gear,34” from the roller shaft of “ASF, Assembly”. 3. Remove the cable from a hook of “ASF Assembly” and cable hook of the “Printer Mechanism”.
  • Page 71 EPSON Stylus Photo 750 Revision A 4.2.5.6 Paper Feed Roller Assembly Removal 1. Remove “ASF, Assembly”. (See “ASF, Assembly Removal” on page -65) 2. Remove “Torsion Spring,41.2” by unhooking one end from the ASF frame and remove “Lever, Brake”. 3. Remove “Bush, Fixing, Shaft” from the right end of “Shaft, Roller, LD”...
  • Page 72 EPSON Stylus Photo 750 Revision A 4.2.5.7 Roller Assembly, LD Left/Right Removal 1. Remove “ASF, Assembly”. (See “ASF, Assembly Removal” on page -65) 2. Remove right and left “Compression Spring, 1.66” from the back of “Hopper, Assembly”. 3. Pull out the cam part of “Hopper, Assembly” through the hole of the right frame of “Paper Feed, Roller Assembly, Right”.
  • Page 73 EPSON Stylus Photo 750 Revision A 4.2.5.8 Carriage Assembly Removal 1. Remove the upper housing.(See “Housing Removal” on page -54) 2. Push “Holder, Pulley, Driven” to loosen the timing belt and detach the timing belt from the pulley of CR motor assembly.

  • Page 74: Adjustment

    EPSON Stylus Photo 750 Revision A When installing the spring washer, convex side should be facing to the “Bush, Parallel Adjust, Right”. Be careful not to install in wrong direction. Perform following adjustments, after replacing or removing “Carriage Assembly”. „ Paper Gap Adjustment (See “Paper Gap Adjustment”...
  • Page 75 EPSON Stylus Photo 750 Revision A 4.2.5.9 PE Sensor Assembly Removal 1. Remove the upper housing.(See “Housing Removal” on page -54) 2. Release 2 hooks from the frame surface and remove “PE Sensor Assembly” by sliding it. When installing the PE Sensor Assembly, be sure that the sensor lever is correctly inserted into a hole of “Paper Guide Assembly”.
  • Page 76 EPSON Stylus Photo 750 Revision A 4.2.5.10 Roller, Assembly, PF Removal 5. Remove “Torsion Spring,117.6” from the frame and remove 6 pieces of “Paper Guide Assembly, Upper”. 1. Remove the upper housing.(See “Housing Removal” on page -54) 6. Remove “Paper Guide, Front;B”, releasing its hook.
  • Page 77 EPSON Stylus Photo 750 Revision A 9. Move the whole “Roller, Assembly, PF” to the left direction, and remove the “Roller, Assembly, PF”. „ When reinstalling “Paper Guide, Assembly, Upper” at the right edge, be careful not to damage the “PE Sensor Lever”.
  • Page 78 EPSON Stylus Photo 750 Revision A 4.2.5.11 HP Sensor Removal 1. Remove the upper housing. (“Housing Removal” on page -54) 2. Disconnect the cable from “HP Sensor” and remove it by releasing its hook. Figure 4-25. HP Sensor Removal Disassembly and Assembly...
  • Page 79 EPSON Stylus Photo 750 Revision A 4.2.5.12 Cartridge Sensor(Sensor, I/C) Removal 3. Release 4 hooks(2 outer hooks, 2 inside hooks), which secure “Holder, Sensor, I/C” with the carriage assembly”, and remove the 1. Remove one screw securing “Bush Holder, Sensor, I/C” to the “Holder, Sensor, I/C”...
  • Page 80 EPSON Stylus Photo 750 Revision A Carriage Assembly Sensor, I/C Engaging parts at the carriage side Hooks Figure 4-29. Sensor, I/C Removal 5. Separate “Sensor, IC” from the harness by releasing its connection. „ Be careful of the direction of sensor, when installing it.

  • Page 81: Adjustment

    & + $ 3 7 ( 5 ADJUSTMENT...

  • Page 82: Overview

    EPSON Stylus Photo 750 Revision A 5.1 Overview Note) “O”: Required Adjustment. “NA”: Not applicable. This section describes the procedure for adjustments required when the printer is disassembled and assembled for repair. 5.1.1 Required Adjustment Table 5-1 lists all the necessary adjustments for this printer. If any...

  • Page 83: Adjustment

    EPSON Stylus Photo 750 Revision A 5.2 Adjustment This section describes the detailed procedures of each adjustment. 5.2.1 Paper Gap Adjustment When replacing the carriage assembly or removing it during printer mechanism disassembly, perform the paper gap adjustment during assembling and get the standard distance from the surface of the printing head to the paper surface.
  • Page 84 EPSON Stylus Photo 750 Revision A 6. From this thickness with which the thickness gauge stars moving with the carriage, move the gear of the “Bush, Parallel, Adjustment one notch forward you. (Gap will be narrowed) At this time, make sure that the thickness gauge does not move.

  • Page 85: Adjustment By Adjustment Program

    EPSON Stylus Photo 750 Revision A 5.3 Adjustment by Adjustment Program In this printer, it is necessary to set the correct information for each printer mechanism in order to maintain consistent printing function and quality, eliminating difference of each printer mechanism’s characteristics.
  • Page 86 EPSON Stylus Photo 750 Revision A 6. Select “World”. 7. Select “Perform”, if “Printer is not ready” message is not indicated. Figure 5-3. Options in the Program and Keys to Use After this screen, menu screen will appear. Each function on the main menu can be executed by ESC and ENTER keys.

  • Page 87: Setting Destination Information

    EPSON Stylus Photo 750 Revision A 5.3.2 Setting Destination Information 1. Select “Adjustment” on the main menu and press Return key. Program goes to the adjustment menu. 2. Select “Market Destination Check” and press Return key. 3. The screen shows “Checking the present Market Destination”.

  • Page 88: Head Voltage Id Adjustment

    EPSON Stylus Photo 750 Revision A 5.3.3 Head Voltage ID Adjustment Since the elements used in the print head differs, it becomes necessary to set the head voltage in appropriate condition so that the amount of discharged ink becomes even. The setting value is determined according to the test result of head characteristics on the production process.

  • Page 89: Head Angular Adjustment

    EPSON Stylus Photo 750 Revision A 5.3.4 Head Angular Adjustment Screw for During production, slight variations are created in print heads and Carriage fixing the print Assembly carriage (which are used as a print head base). If these differences are...
  • Page 90 EPSON Stylus Photo 750 Revision A 5. Refer to the printing pattern, and adjust the head angle by using the 6. Head angular pattern is printed, every time the adjustment lever is adjustment lever. moved. 7. Repeat Step 4 to 6 until the angle becomes normal.

  • Page 91: Bi-D Adjustment

    EPSON Stylus Photo 750 Revision A 5.3.5 Bi-D Adjustment 4. Refer to the Pattern Sample and see if all the lines are aligned from the printed pattern. This adjustment is to correct differences in printing positions, which is caused by slippage of printing timing in right and left directions during 5.

  • Page 92: Head Cleaning

    EPSON Stylus Photo 750 Revision A 5.3.6 Head Cleaning In this function, the same cleaning as the one from the control panel can be performed from the adjustment program. With this sequence, you can forcibly solve the clogged nozzle problem caused by viscous ink.

  • Page 93: Initial Ink Charge

    EPSON Stylus Photo 750 Revision A 5.3.7 Initial Ink Charge There is no ink charged in the ink path of a spare print head and printer mechanism. Therefore, after you replace any of the following units, perform initial ink charge and return the printer after making sure that ink is ejected correctly from the print head.

  • Page 94: Counter Value For Ink Absorber

    EPSON Stylus Photo 750 Revision A 5.3.8 Counter Value for Ink Absorber This function is for indicating the protection counter value for the waste ink absorber and resetting the counter value. This function can be also performed from the control panel. (See “Special Setting Mode” on page -22) 5.3.8.1 Protect Counter Value...

  • Page 95: Maintenance

    & + $ 3 7 ( 5 MAINTENANCE...

  • Page 96: Overview

    EPSON Stylus Photo 750 Revision A 6.1 Overview 6.1.2 Service Maintenance If the print irregularity missing, white line, etc.) has occurred or the This section describes the points and procedures for maintaining the printer indicates “Maintenance Request Error”, take the following printer in its optimum condition.

  • Page 97: Lubrication

    EPSON Stylus Photo 750 Revision A 6.1.3 Lubrication Table 6-2. Lubrication Point Lubrication Type/Point Remarks The type and amount of oil and grease used to lubricated the printer • Apply grease while rotating <Lubrication Point> parts are determined based on the results of internal evaluations.
  • Page 98 EPSON Stylus Photo 750 Revision A Table 6-3. Lubrication Point Table 6-4. Lubrication Point Lubrication Type/Point Remarks Lubrication Type/Point Remarks • Rotate gears after applying • Avoid applying grease to <Lubrication Amount> <Lubrication Point> grease to evenly distribute it. “Roller, Assembly, LD”...
  • Page 99 EPSON Stylus Photo 750 Revision A Maintenance Overview...
  • Page 100 EPSON Stylus Photo 750 Revision A Maintenance Overview...

  • Page 101: Appendix

    & + $ 3 7 ( 5 APPENDIX...

  • Page 102: Connector Summary

    EPSON Stylus Photo 750 Revision A 7.1 Connector Summary Table 7-1. Connector Summary for C259Main 7.1.1 Major Component Unit Connector Function Table to refer. Major component unit of this printer is as follows. Parallel Interface(forward channel) Parallel Interface Connector (See page -14) †...
  • Page 103 EPSON Stylus Photo 750 Revision A Table 7-3. Connector CN5 Table 7-6. Connector CN8 Signal Name Function Signal Name Function Sensor detect signal Phase drive signal (A) Ground Phase drive signal (B) Sensor Power Supply PF-A Phase drive signal (-A)
  • Page 104 EPSON Stylus Photo 750 Revision A Table 7-8. Connector CN9 Table 7-9. Connector CN10 Signal Name Function Signal Name Function Ground +42V Mechanism Drive Power Supply NCHG All Head On Pulse Output +42V Mechanism Drive Power Supply Ground Ground Logic power supply (+5V)

  • Page 105: Component Layout

    EPSON Stylus Photo 750 Revision A 7.2 Component Layout Figure 7-3. C259 Main Component Layout (Soldered Side) Figure 7-2. C259 Main Component Layout Appendix Component Layout...
  • Page 106 EPSON Stylus Photo 750 Revision A Figure 7-4. C257PSB Component Layout Appendix Component Layout...

  • Page 107: Exploded Diagram

    Revision A 7.3 Exploded Diagram Following pages shows exploded diagram of Stylus Photo 750. for EAI, LATIN for LATIN for EAI for ETT For EUR,S.E.ASIA, OCEANIA,RUSSIA EXPLODED DIAGRAM FOR EPSON STYLUS PHOTO 750 (1/3) Figure 7-5. Exploded Diagram-1 Appendix Exploded Diagram...
  • Page 108 EPSON Stylus Photo 750 Revision A EXPLODED DIAGRAM FOR EPSON STYLUS PHOTO 750 (2/3) Figure 7-6. Exploded Diagram 2 Appendix Exploded Diagram...
  • Page 109 EPSON Stylus Photo 750 Revision A (506) (565) (501) 564 562 542 544 542 544 542 544 (505) EXPLODED DIAGRAM FOR EPSON STYLUS PHOTO 750 (3/3) Figure 7-7. Exploded Diagram 3 Appendix Exploded Diagram...

  • Page 110: Electric Circuit

    EPSON Stylus Photo 750 Revision A 7.4 Electric Circuit Next pages shows the following electric circuits. † C259(or C264) MAIN Control Circuit † C257 PSB/C257 PSE Power Supply Circuits Appendix Electric Circuit...

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