Notice † All rights reserved. No part of this manual may be reproduced, stored in a retrieval system, or transmitted in any form or by any means electronic, mechanical, photocopying, or otherwise, without the prior written permission of 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.
PRECAUTIONS Precautionary notations throughout the text are categorized relative to 1)Personal injury and 2) damage to equipment. DANGER Signals a precaution which, if ignored, could result in serious or fatal personal injury. Great caution should be exercised in performing procedures preceded by DANGER Headings. WARNING Signals a precaution which, if ignored, could result in damage to equipment.
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. Contents Symbols Used in This Manual This manual consists of six chapters and Appendix. CHAPTER 1.
Revision Status Revision Rev.
Stylus Photo 750 Revision A Table of Contents Product Description Consumables and options....................................................................... 26 Overview......................................................................................................... 4 General Characteristics............................................................................. 4 Operating Principles General Description...................................................................................
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 .......................................................
&+$37(5 4 PRODUCT DESCRIPTION
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. 1.1.1 General Characteristics Major features of this printer are as follows; † High quality color printing „ Bi-directional printing at the resolution of 720 dpi. „ 1440 (H) x 720 (V) dpi printing „ Photo-MACH technology (6 color printing.
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) 80 200CPS** NOZZLE CONFIGURATION † 48 nozzles x 6 (Black, Cyan, Magenta, Yellow, Light Cyan, Light Magenta) ** This value is the speed of one print-pass in which the 1/3 of character matrix is printed. † Raster graphics mode Table 1-2.
EPSON Stylus Photo 750 Revision A „ Thickness: 0.08mm(0.003”)-0.11mm(0.004”) TYPEFACE † Bin map LQ font: EPSON Courier, 10 CPI 1.2.2 Paper Feeding 64g/m2(17lb.) - 90g/m2(24lb) „ Quality: Exclusive paper, Bond paper, PPC † Transparency and Glossy Paper † Feeding Method: Friction feed with ASF „ Size: † Paper Path: Cut-sheet ASF(Top entry) † Feeding Speed: 2.36 inches/sec (normal speed mode/continuous feeding) 4.
EPSON Stylus Photo 750 Revision A 1.2.4 Printable Area † Cut Sheet Table 1-3. Printable Area The figure below shows printable area. L M R M T M B M Figure 1-3. Printable Area Product Description Paper Width (typ) Paper Length (typ.) Left Margin (min.) Right Margin (min.) A4 210mm (8.3”) 297mm (11.7”) 3mm (0.12”) 3mm (0.12”) Letter 216mm (8.5”) 279mm (11.0”) Legal 216mm (8.5”) 356mm (14.0”) 3mm (0.12”) Statement 139.7mm (8.5”) 215.9mm (8.5”) B5 182mm (7.
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. Paper Size LM(Left margin) (min.) RM(RIght margin) (min.) TM(Top margin) (min.) BM(Bottom margin) (min.) #10 28mm(1.10”) 3mm(0.12”) 3mm(0.12”) 14mm(0.55”) Paper Lever position Adjustment Value DL 7mm(0.28”) 3mm(0.12”) 3mm(0.12”) 14mm(0.55”) C6 3mm(0.
EPSON Stylus Photo 750 Revision A † Resistance to shock: 1.2.6 Environmental Conditions † Temperature: „ Operating: 1G, within 1ms 2G, within 2ms(*1) „ Operating: 10 to 35°C(*3) „ Non-operating: „ Non-operating: -20 to 60°C(*1) † Resistance to vibration: NOTE: 1 month at 40°C and 120 hours at 60°C † Humidity: „ Operating: 20 to 80% RH(*2,*3) „ Non-operating: 5 to 85% RH(*1,*2) „ Operating: 0.15G „ Non-operating: 0.
EPSON Stylus Photo 750 Revision A 1.2.7 Ink Cartridge 1.2.7.2 Color Ink Cartridge 1.2.7.1 Black Ink Cartridge † Type: Exclusive cartridge † Color: Black 2 years from production date † Storage temperature:-20°C to 40°C(Storage within a month at 40°C) -30°C to 40°C(Packing storage, within a month at 40°C) -30°C to 60°C(Transit, within 120 hours at 60°C and within a month at 40°C) † Dimension: 19.8mm(W) x 52.7 mm (D)x 38.
EPSON Stylus Photo 750 Revision A „ Insulation Resistance:10 M ohms min. (between AC line and chassis, DC 500V) 1.2.8 Input Data Buffer † Buffer: 256 Kbytes „ Dielectric: 1.2.9 Electric Specification † 120V version AC 1500 V rms. 1 minute (between AC line and chassis) 1.2.
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: „ EMC Directive 89/336/EEC: „ Unidentical Printing: ESC U EN55022 Class B EN61000-3-2 EN61000-3-3 EN50082-1 IEC801-2 IEC801-3 IEC801-4 1.2.14 Printer Language and Emulation † Printer Language: ESC/P Raster EPSON Remote 1.2.14.
EPSON Stylus Photo 750 „ Dot size control: ESC (e „ Raster header: ESC (D „ Raster body: ESC i Revision A † Color: „ Printing Color: ESC r, ESC (r † EEPROM control: „ EEPROM control: ESC | Product Description General Description 13
EPSON Stylus Photo 750 Revision A 1.3 Parallel Interface This printer has IEEE-1284 parallel interface, RS-423 serial interface and USB interface as standard. 1.3.1 Parallel Interface(Forward channel) Forward channel is the mode to transfer the ordinary printing order to the printer side from the PC side. Table 1-6. Parallel I/F Item Transmission mode Synchronization Specification 8bit parallel, IEEE-1284 compatibility mode By BUSY and ACKNLG signal Signal Level TTL compatible level Table 1-7.
EPSON Stylus Photo 750 Revision A 1.3.2 Parallel Interface(Reverse channel) Pin. No Signal Name Return GND pin In/Out Function Description 18 Logic H --- Out Pulled up to +5V via 3.9K ohm resistor. 35 +5V --- Out Pulled up to +5V via 3.3 K ohm resistor. 17 Chassis GND --- --- Chassis GND. 16,33 19-30 GND --- --- Signal GND. 15,34 NC --- --- Not connected. Reverse channel is used to transfer the information data from the printer side to the PC side. Table 1-8.
EPSON Stylus Photo 750 „ When IEEE1284.4 protocol is NOT effective: [00H] [57H] MFG:EPSON; CMD:ESCPL2,BDC; MDL:Stylus[SP]Photo[SP]750; CLS:PRINTER; DES:EPSON[SP]Stylus[SP]Photo[SP]750; NOTE: [00H] denotes a hexadecimal value of zero. [SP] denotes a space character(20H). MDL and DES values depend on the EEPROM setting. Product Description Revision A Table 1-9. Connect pin assignment and signals Pin. No Signal Name Return GND pin In/Out Function Description 1 HostClk 19 In Host clock signal.
EPSON Stylus Photo 750 Revision A NOTE: Following lists “Notes” when using the parallel interface. 1. “Return GND pin” in the table means twist pair return and is connected to the signal GND level. Also, these cables are shielded wires and it is effective means to connect to each chassis GND in the PC and printer for electrostatic noise.
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. 1.
EPSON Stylus Photo 750 Revision A 1.3.4 USB(Universal Serial Bus) Interface Following shows specification. † Standard: Based on P in 1 P in 2 „ 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) † Data encording: NRZI † Adaptable connector: USB Series B P in 3 † Recommended cable length: 2 meters Table 1-14. Connector pin assignment and signals Figure 1-11.
EPSON Stylus Photo 750 Revision A 1.3.5 Prevention of data transfer time-out on the host Generally, hosts abandon data transfer to peripherals when a peripheral is in busy state for dozens of seconds continuously. To prevent hosts from acting this kind of time-out, the printer receives data very slowly, several bytes per minute, even if the printer is in busy state. This slowdown starts when the remaining input buffer is less than several hundreds of bytes.
EPSON Stylus Photo 750 Revision A 1.4 Function 1.4.3.1 Switches 1.4.1 Control Code Since this printer does not have so many switches, each button has several functions. The tables below show their functions and how to enter those functions for each switch. This printer is operated with the raster graphics control code based on the ESC/P2 control line. Refer to “ESC/PV2 Reference Manual” and “ESC/P2 specification” for each command and ESC sequence. Table 1-15.
EPSON Stylus Photo 750 Revision A NOTE: *Waste ink counter value and Timer IC counter value are initialized. *1(from the previous page): According to the content of 35H of EEPROM, one of the following actions is carried out. Table 1-17. Status printing Content of 35H of EEPROM, [bit7] [bit6] 1.4.5 LED Indications Action There are 4 LEDs in this printer. • Print firmware version, ink counter, selected code page and nozzle check pattern 00 1.
EPSON Stylus Photo 750 Revision A 1.4.6 Errors Table 1-19.
EPSON Stylus Photo 750 Revision A † No Ink Cartridge When the printer detects that ink-cartridge comes off, it becomes “No ink cartridge error” condition. C A U T IO N 1.4.7 Initialization There are 3 types of initialization. „ When you need to perform test print after the repair service, performing the status-printing(see “Control Panel” on page -21) provides the discharged ink condition from the all ink nozzles and the current value of the waste ink counter.
EPSON Stylus Photo 750 Revision A 1.4.8 Initialization Setting 1.4.9 Physical Specification This printer initializes following settings as initialization setting when the initialization is performed. Also, among the items of panel setting, default setting and remote command settings, the items which can be stored are also initialized as initialization setting. † Weight: 5.2Kg † Dimensions: 429 mm(W) x 260.9 mm(D) x 167.
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 No.
&+$37(5 5 OPERATING PRINCIPLES
EPSON Stylus Photo 750 Revision A † Print Head Each color 120 DPI, 48 nozzle x 6 colors(Black, Cyan, Light Cyan, Magenta, Light Magenta, Yellow). Head is mounted at the carriage mechanism. 2.1 Overview This section describes operating principles of the printer mechanism and electric circuit boards (C259Main, C257PSB and C209PNL). 2.1.1 Printer Mechanism This printer is composed of Print Head, Carriage Mechanism, Hopper Drive Mechanism, Paper Feed Mechanism, Pump Mechanism and Carriage Lock Mechanism.
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 This part receives motive power from the PF motor and absorbes bubbles and viscous ink on the print head nozzle by using the motor rotation and drains them to the waste ink pad.
EPSON Stylus Photo 750 Revision A 2.2 Operating Principles of Electric Circuit The electric circuit of this printer consists of the following circuits. † C259 Main Control Circuit 2.2.1 C257 PSB Power Supply Circuit The power supply circuit in the printer uses RCC(Ringing Choke Converter) circuit method, and generates and outputs 2 types of voltages which are necessary for the printer operation. † C257 PSB Power Supply Circuit Table 2-1.
EPSON Stylus Photo 750 +42 VDC Revision A +5 VDC † +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 from Main board ZD53 † +5V Line Over Voltage Protection Circuit: This protection circuit is in the same line as +42V over voltage protection circuit is located.
EPSON Stylus Photo 750 Revision A 2.2.2 C259 Main Control Circuit 2.2.2.1 Major Elements Printer mechanism is controlled by C259 main board. The figure below shows the block diagram of C259 main control circuit. Major elements used in C259 main control circuit board are below. Table 2-2. Major Elements IC CPU C90A05CA CN3 USB Cartridge Sensor P-ROM (IC3) CN9 HD FFC Head 16bit CPU mounted on the control circuit board is driven by 24MHz clock frequency, and controls the whole printer.
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. Also, IC sends the reset signal to the CPU and gate array when +42VDC line voltage is less than +35.5V.
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 HP sensor uses the photo interrupter method. A HP sensor detects the carriage home position. It is used for managing printing position and cleaning, etc. † PE Sensor PE sensor uses the photo interrupter method. A PE sensor determines if there is a paper in the printer.
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 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. Head drive circuit of this printer consists of the following circuits.
EPSON Stylus Photo 750 Revision A † Driver on the head The driver on the head is Nozzle-selector drive circuit. Each drive waveform generated in the drive voltage wave form circuit is charged to the selected nozzle by this circuit with PZT elements, then, printing is performed. 2.2.2.7 Paper Feed (Pump) Motor (PF/Pump Motor) Drive Circuit IC12 and IC13 on the control circuit board drive PF/PUMP motor. This motor uses 4-phase 200-pole Hybrid type stepping motor and drives constant current bi-pola.
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.
&+$37(5 6 TROUBLESHOOTING
EPSON Stylus Photo 750 Revision A 3.1 Overview This section describes how to identify and troubleshoot the problems when repairing the printer by dividing the troubles into two levels; repair and replacement of the assemblies and units, and repair of the components. Refer to the flowchart below and perform repairing the component after separating the defective units. S T A R T Table 3-2.
EPSON Stylus Photo 750 Revision A Table 3-3. Error Indication LED Indication Condition Power Paper Check Ink End (Black) Ink End (Color) No Paper -- On -- -- Paper Jam -- Blink Off Off Ink End / No Cartridge (black) -- -- On Remedy Set papers Removed the jammed paper -- Close the cartridge cover correctly or replace the ink cartridge with new one. Close the cartridge cover correctly or replace the ink cartridge with new one.
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. You are to identify the faulty unit based on the primary symptom listed in the Table3-4. After this, refer to 3.4 Unit Repair and find and replace the defective parts.
EPSON Stylus Photo 750 2. Error is detected. Revision A 3. Abnormal printing operation S T A R T Figure 3-3. Flowchart 2 Figure 3-4.
EPSON Stylus Photo 750 Revision A 4. Paper feed operation is not performed correctly 5. Abnormal Control Panel S T A R T Is p a p e r s e t in th e A S F c o r r e c tly ? S T A R T Is c o n tro c o n n c o rre N O S e t th e p a p e r c o r r e c tly th e l p a n e l e c te d N O c tly ? Y E S Y E S D o th e P F r o lle r a n d p la te n ro ta te ? N O Is th e P F m o to r r u n n in g ? R e m o v e a n y o b s tr u c tio n in th e p a p e r p a th if th e r e is a n y .
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. Table 3-5. Repair of the Power Supply Board Sympto m Condition Table 3-6. Repair of the Power Supply Board Cause Check point Solution F1 is open.
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. Table 3-7. Repair of the Control Board Sympto m Condition Cause Table 3-8.
EPSON Stylus Photo 750 Revision A Table 3-9. Repair of the Control Board Sympto m Condition Cause Check point Solution Check the signal waveform of DATA(Pin 29) of IC14 and Common NPNB/PNPB(Pin 16/19). Abnormal printing Troubleshooting IC12 is broken. If DATA is not input, replace IC2. IC14 is broken. Replace IC14.
EPSON Stylus Photo 750 Revision A 3.5 Unit Repair (Printer Mechanism) This section provides instruction for repairing mechanism. It describes various problems, symptom, likely causes, checkpoints, and solutions. Select appropriate symptom from the the table and check each parts and its function as describes in the checkpoint. Table 3-11. Repair of the Printer Mechanism Symptom Condition Table 3-10. Repair of the Printer Mechanism Symptom Abnormal Pump Mechanism Defective pump absorption.
EPSON Stylus Photo 750 Revision A Table 3-12. Repair of the Printing Mechanism Symptom Condition Cause Head FFC is out of connection. Printing is not performed. Abnormal printing Carriage moves but no printing is performed. Only a particular dot causes abnormal printing. Check visually if the head FFC on the board or carriage is connected firmly. Solution Check the FFC Replace the by using a tester. FFC. I/C is defective. Install new I/C and perform the self-test. Head Unit is defective.
EPSON Stylus Photo 750 Revision A Table 3-14. Repair of the Printer Mechanism Symptom Condition A vertical line is not aligned. Abnormal Printing. Abnormal Paper Feeding. White line appears in the imaged data. Cause Solution Bi-directional alignment is not adjusted. Perform Bi-D adjustment. Refer to Chapter 5 “Adjustment”. Head angle is not correct. Perform head angle adjustment. Refer to Chapter 5 “Adjustment”. Platen gap is not right. Perform Platen Gap adjustment.
&+$37(5 7 DISASSEMBLY AND ASSEMBLY
EPSON Stylus Photo 750 Revision A 4.1 Overview This section describes procedures for disassembling the main components of EPSON Stylus Photo750. Unless otherwise specified, disassembly units or components can be reassembled by reversing the disassembly procedure. Precautions for any disassembly or assembly procedures are described under the heading “Caution”. Any adjustment required after disassembling the units are described under the heading “Required Adjustment”.
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 confirm that all works are completed properly and the printer is ready to return to the user. Table 4-2. Check List Classifi -cation Item Self-test On-line test Print head Carriage Mechanism Main Unit Paper Feeding Mechanism Table 4-3.
EPSON Stylus Photo 750 Revision A 4.2 Disassembly The flowchart below shows step-by step disassembly procedures.
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. 2. Remove 4 screws and remove the upper housing. C H E C K P O IN T C A U T IO N Pull the front edge of the upper housing while lifting up the upper housing to remove it.
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, C257PSB: 4 screws), and remove each board. 1. Remove the upper housing. (“Housing Removal” on page -54) 2. Remove 5 screws securing the “Printer Mechanism” to the “Shield plate, M/B”.
EPSON Stylus Photo 750 C H E C K P O IN T A D J U S T M E N T R E Q U IR E D 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” on page -83) 2. Head Angular Adjustment (See “Head Angular Adjustment” on page -84 3.
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. 4. Remove 2 screws securing the “Board, Assembly, Panel” to the printer mechanism, then remove C209PNL board from the “Panel, Assembly”. 5. Remove FFC from the connector on the C209PNL board.
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. 4. Remove “Spacer Tray” securing “Absorber Tray, Assembly” at the left side of the printer mechanism and remove “Absorber Tray, Assembly;A” by pulling it downward.
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. 3. Remove black and color ink cartridges. 4. Remove “Cover, Cartridge, B” and “Cover, Cartridge, C” from the carriage assembly. 5. Remove the “Torsion Spring, 49” and one screw.
EPSON Stylus Photo 750 C H E C K P O IN T Revision A „ Be sure that the grounding plate is installed to the carriage correctly. (There are 2 fixing pins on the carriage. „ After installing the print head to the carriage, be Figure 4-8.
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” on page -58) 4. Loosen 2 screws and disengage the “Frame, Assembly, Exit” and side frame. 5. Sand up the printer mechanism so that you can see the bottom of the printer mechanism. 6.
EPSON Stylus Photo 750 C H E C K P O IN T 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” and “Cap, Assembly”. „ After installing the “Pump, Assembly”, rotate the “Gear, 67.2” and check if the cleaner part moves back and forth.
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. 3. Push “Holder, Pulley, Driven” to loosen the timing belt and detach the timing belt from the pulley of the CR motor. C o n p r e s s io n , S p r in g , 1 9 .
EPSON Stylus Photo 750 Revision A 4.2.5.4 Motor Assembly PF Removal 4. Remove the hexagon nut and ”Motor, Assembly, PF”. 1. Remove the upper housing.(See “Housing Removal” on page -54) 2. Remove “Absorber Tray, Assembly;A”. (See “Absorber Tray, Assembly;A Removal” on page -58) C H E C K P O IN T 3. Remove the following gears which are located at the left side of the printer mechanism.
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”. 4. Remove a “Shaft, Fixing, CR” and one screw securing “ASF, Assembly” to the printer mechanism frame. 5.
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) H O P P E R , A S S E M B L Y 2. Remove “Torsion Spring,41.2” by unhooking one end from the ASF frame and remove “Lever, Brake”. L E V E R , B R A K E T o r s io n S P R IN G , 4 1 .2 3. Remove “Bush, Fixing, Shaft” from the right end of “Shaft, Roller, LD” and remove “Lever, Hopper, Release”. 4.
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”. This will separate “Paper Feed, Roller Assembly” and “Hopper, Assembly”. 4.
EPSON Stylus Photo 750 Revision A 4.2.5.8 Carriage Assembly Removal 1. Remove the upper housing.(See “Housing Removal” on page -54) B U S H , P A R A L L E L A D J U S T , R IG H T B U S H , P A R A L L E L A D J U S T , R IG H T 2. Push “Holder, Pulley, Driven” to loosen the timing belt and detach the timing belt from the pulley of CR motor assembly. 3. Take out “Compression Spring, 19.6” from “Holder, Pulley, Driven”. 4.
EPSON Stylus Photo 750 C H E C K P O IN T A D J U S T M E N T R E Q U IR E D 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”.
EPSON Stylus Photo 750 Disassembly and Assembly Revision A Disassembly 70
EPSON Stylus Photo 750 Revision A 4.2.5.10 Roller, Assembly, PF Removal 1. Remove the upper housing.(See “Housing Removal” on page -54) 2. Remove “Carriage, Assembly”. (See “Carriage Assembly Removal” on page -68) 5. Remove “Torsion Spring,117.6” from the frame and remove 6 pieces of “Paper Guide Assembly, Upper”. 6. Remove “Paper Guide, Front;B”, releasing its hook. 3. Remove “PE Sensor Assembly”. (“PE Sensor Assembly Removal” on page -70) 4.
EPSON Stylus Photo 750 Revision A 9. Move the whole “Roller, Assembly, PF” to the left direction, and remove the “Roller, Assembly, PF”. C H E C K P O IN T P u t "R O L L E R , A S S E M B L Y , P F " th ro u g h h e re „ When reinstalling “Paper Guide, Assembly, Upper” at the right edge, be careful not to damage the “PE Sensor Lever”. „ Be careful not to damage the hook, when removing or installing “Paper Guide, Front; B”.
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. S E N S O R , H P C R M O T O R Figure 4-25.
EPSON Stylus Photo 750 Revision A 4.2.5.12 Cartridge Sensor(Sensor, I/C) Removal 1. Remove one screw securing “Bush Holder, Sensor, I/C” to the carriage assembly, and remove it. Screw 3. Release 4 hooks(2 outer hooks, 2 inside hooks), which secure “Holder, Sensor, I/C” with the carriage assembly”, and remove the “Holder, Sensor, I/C” upward. Bush Holder, Sensor, I/C Carriage Assembly Engaging Hole Engaging Holes Figure 4-26.
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. C H E C K P O IN T „ Be careful of the direction of sensor, when installing it. Switch part should face to the front side. „ When installing “Holder, Sensor, I/C” to the “Carriage, Assembly”, do not pinch the harness with carriage and holder.
&+$37(5 8 ADJUSTMENT
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 service listed in this table is carried out, all adjustments corresponding to that service should be performed to ensure proper operation of the printer. Table 5-1.
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. C A U T IO N „ Do not scratch special coated surface of the PF roller and rib surface of “Paper Guide, Front ;B”.
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. P o s itio n M a r k F o rw a rd ( G a p : W id e r ) B a c k w a rd (G a p : N a rro w e r) S id e F r a m e "B U S H , P A R A L L E L A D J U S T , R IG H T " "L E V E R , P G " Figure 5-2. Paper Gap Adjustment 7.
EPSON Stylus Photo 750 Revision A 5.3 Adjustment by Adjustment Program P ro m p t-S P 7 5 0 A u to 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.
EPSON Stylus Photo 750 Revision A 6. Select “World”. M a in m e n u P ro m p t-S P 7 5 0 E S C K e y A u to R e tu rn K e y a d j3 7. Select “Perform”, if “Printer is not ready” message is not indicated.
EPSON Stylus Photo 750 Revision A 5.3.2 Setting Destination Information P ro m p t-S P 7 5 0 A u to 1. Select “Adjustment” on the main menu and press Return key. Program goes to the adjustment menu. P ro m p t-S T 7 5 0 A u to a d j5 P ro m p t-S P 7 5 0 A u to a d j4 2. Select “Market Destination Check” and press Return key. 3. The screen shows “Checking the present Market Destination”. Press Return key. Then, screen will indicate “Market Destination is Standard for World”. 4.
EPSON Stylus Photo 750 Revision A 5.3.3 Head Voltage ID Adjustment P ro m p t-S P 7 5 0 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. A u to 1. Select “Adjustment” on the main menu and press Return key. Program goes to the adjustment menu.
EPSON Stylus Photo 750 Revision A 5.3.4 Head Angular Adjustment During production, slight variations are created in print heads and carriage (which are used as a print head base). If these differences are not adjusted, they can adversely influence the print head angle, and result in the poor print quality. Carriage Assembly Screw for fixing the print head 1. Select “Adjustment” on the main menu and press Return key. Program goes to the Adjustment menu. 2.
EPSON Stylus Photo 750 Revision A 5. Refer to the printing pattern, and adjust the head angle by using the adjustment lever. 6. Head angular pattern is printed, every time the adjustment lever is moved. 7. Repeat Step 4 to 6 until the angle becomes normal. T o m o v e th is d o w n , 8. After adjustment is completed, press ESC key until the screen goes back to the adjustment menu. 9. Tighten the screw for fixing the head. m o v e th e le v e r to th e r ig h t ( r e a r ) .
EPSON Stylus Photo 750 Revision A 5.3.5 Bi-D Adjustment This adjustment is to correct differences in printing positions, which is caused by slippage of printing timing in right and left directions during the Bi-directional printing. The value adjusted in this section will be stored as Bi-D corrected value in the EEPROM on the control board. 4. Refer to the Pattern Sample and see if all the lines are aligned from the printed pattern. 5.
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. P ro m p t-S P 7 5 0 A u to 1. Select “Maintenance” on the Main Menu and press Return key. 2. Select “Head Cleaning” and press Return key. PP rr oo mm pp tt -- SS PP 77 55 00 A A u u t ot o a d j1 6 4.
EPSON Stylus Photo 750 Revision A 5.3.7 Initial Ink Charge P ro m p t-S P 7 5 0 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. Perform initial ink charge at the following cases. A u to „ After replacing the printer mechanism „ After replacing or removing the print head 1.
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 1. Select “Maintenance” on the main menu and press Return key. The screen goes to the maintenance menu. 2.
&+$37(5 9 MAINTENANCE
EPSON Stylus Photo 750 Revision A 6.1 Overview 6.1.2 Service Maintenance This section describes the points and procedures for maintaining the printer in its optimum condition. If the print irregularity missing, white line, etc.) has occurred or the printer indicates “Maintenance Request Error”, take the following actions to clear the error. 6.1.1 Cleaning This printer has no mechanical components which require regular cleaning.
EPSON Stylus Photo 750 Revision A 6.1.3 Lubrication Table 6-2. Lubrication Point The type and amount of oil and grease used to lubricated the printer parts are determined based on the results of internal evaluations. Therefore, be sure to apply the specified type and amount of oil and grease to the specified part of the printer mechanism during servicing. No. „ Never use oil and the grease other than those specified in this manual.
EPSON Stylus Photo 750 Revision A Table 6-3. Lubrication Point Table 6-4. Lubrication Point No. Lubrication Type/Point 4 • 1/4 of gear tooth for “Gear, 67.2” • 1/3 of gear tooth for “Combination Gear, 16,21.6” • 1/3 of gear tooth for “Gear, 23.2” • Rotate gears after applying grease to evenly distribute it. • Use a syringe to apply it. The shaft for “Gear, 16, 40.8” on “Frame, Left”.
EPSON Stylus Photo 750 Maintenance Revision A Overview 94
EPSON Stylus Photo 750 Revision A "H O L D E R , P U L L E Y , D R IV E N " * N e v e r a p p ly th e o il e x c e e d in g 0 .6 c c . N o .1 2 ( O il p a d ) C a r r ia g e A s s e m b ly ( b o tto m v ie w ) N o .8 "H O P P E R , A S S E M B L Y " "S H A F T , C R , G U ID E " N o .1 0 "F R A M E , A S F " N o .
&+$37(5 : APPENDIX
EPSON Stylus Photo 750 Revision A 7.1 Connector Summary Table 7-1. Connector Summary for C259Main 7.1.1 Major Component Unit Connector Major component unit of this printer is as follows. † Control Panel (C209PNL) † Printer Mechanism (M-4M11) The figure below shows how these components are connected. AC Table to refer. CN1 Parallel Interface Connector Parallel Interface(forward channel) (See page -14) CN2 Mac.
EPSON Stylus Photo 750 Revision A Table 7-3. Connector CN5 Pin Signal Name I/O Function 1 PE In 2 GND 3 PEV Table 7-6. Connector CN8 Pin Signal Name I/O Function Sensor detect signal 1 PFA Out Phase drive signal (A) --- Ground 2 PFB Out Phase drive signal (B) --- Sensor Power Supply 3 PF-A Out Phase drive signal (-A) 4 PF-B Out Phase drive signal (-B) Table 7-4.
EPSON Stylus Photo 750 Revision A Table 7-8. Connector CN9 Pin Signal Name I/O 15 GND -- 16 NCHG Out 17 GND 18 Table 7-9.
EPSON Stylus Photo 750 Revision A 7.2 Component Layout Figure 7-2. C259 Main Component Layout Appendix Figure 7-3.
EPSON Stylus Photo 750 Revision A Figure 7-4.
EPSON Stylus Photo 750 Revision A 7.3 Exploded Diagram Following pages shows exploded diagram of Stylus Photo 750. 126 102 751 115 766 500 766 752 105 126 125 180 450 135 106 107 125 125 752 101 181 for EAI, LATIN 124 124 132 182 753 133 122 104 for LATIN 119 124 122 400 for EAI 103 124 400 for ETT 123 For EUR,S.E.ASIA, OCEANIA,RUSSIA 134 400 123 401 100 EXPLODED DIAGRAM FOR EPSON STYLUS PHOTO 750 (1/3) Figure 7-5.
EPSON Stylus Photo 750 Revision A Figure 7-6.
EPSON Stylus Photo 750 Revision A Figure 7-7.
EPSON Stylus Photo 750 Revision A 7.4 Electric Circuit Next pages shows the following electric circuits.
