Epson Stylus Photo 720 Service Manual
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Epson Stylus Photo 720 Service Manual

Epson color inkjet printer service manual
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SERVICE MANUAL
SERVICE MANUAL
SERVICE MANUAL
SERVICE MANUAL
Color Inkjet Printer
EPSON STYLUS PHOTO 720 / STYLUS PHOTO EX3

SEIJ00001

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Summary of Contents for Epson Stylus Photo 720

  • Page 1 SERVICE MANUAL SERVICE MANUAL SERVICE MANUAL SERVICE MANUAL Color Inkjet Printer EPSON STYLUS PHOTO 720 / STYLUS PHOTO EX3 SEIJ00001...
  • Page 2 The contents of this manual are subject to change without notice. All efforts 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

    APPENDIXProvides the following additional information for mechanical operations, maintenance and repair procedures of EPSON reference: Stylus Photo 720 / Stylus Photo EX3. The instructions and procedures • Connector pin assignments included herein are intended for the experienced repair technicians, and •...
  • Page 5 Revision Status Revision Issued Date Description Rev. A April 6, 2000 First Release...

  • Page 6: Table Of Contents

    EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A Contents Product Description Printable Area ..................24 Ink Cartridge ................... 26 Overview ....................... 9 Physical Specification ................27 Features ....................9 Consumables and Options ............... 28 Basic Specification ..................10 Printing Specification ................
  • Page 7 EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A Troubleshooting Adjustment Overview ..................... 52 Overview ....................95 Required Adjustment ................95 Unit Level Troubleshooting ..............54 Printer does not operate at power on ............. 54 Adjustment ....................96 Error is detected ..................

  • Page 8: Product Description

    C H A P T E R PRODUCT DESCRIPTION...

  • Page 9: Overview

    EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A 1.1 Overview Stylus Photo 720 Stylus Photo 720 and Stylus Photo EX3 is developed from Stylus Photo 700 and Stylus Photo EX and allows a high resolution photographic high quality print enabled by variable dot. 1.1.1 Features Major features of this printer are as follows;...

  • Page 10: Basic Specification

    EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A 1.2 Basic Specification PRINTING SPEED AND PRINTABLE COLUMNS Character mode: Refer to the table below. 1.2.1 Printing Specification Table 1-1. Printing Speed (Character Mode) PRINTING METHOD Character Pitch Printable Columns...

  • Page 11: Paper Feed Specification

    EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A 1.2.4 Electric Specification CHARACTER TABLES 120V version 2 international character sets Rated voltage: AC 100V PC437 (US, Standard Europe) Input voltage range: AC 99 -132V PC850 (Multilingual) Rated frequency range:...

  • Page 12: Environmental Conditions

    EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A 1.2.5 Environmental Conditions 1.2.6 Reliability Temperature Total print volume: 10,000 pages (A4, Letter) ° Operating: 10 to 35 Print Head Life: 3 billion dots / nozzle ° Non-operating: -20 to 40 Or 5 years at the normal temperature °...

  • Page 13: Interface Specification

    EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A 1.3 Interface Specification Table 1-4. Connector Pin Assignment and Signals (F-Channel) Return Signal Pin No. From Function Description This printer has IEEE-1284 parallel interface and USB interface as standard.
  • Page 14 EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A Device ID Table 1-5. Parallel I/F Specification (R-Channel) When IEEE-1284.4 protocol is effective: Item Specification [00H] [5AH] Transmission mode IEEE-1284 nibble mode MFG: EPSON; CMD: ESCPL2, BDC, D4; Synchronization Comply with the IEEE-1284 specification MDL: Stylus[SP]Photo[SP]720;...
  • Page 15 EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A Table 1-6. Connector Pin Assignment and Signals (F-Channel) DATA Data byte n Data byte n+1 Return Pin No. Signal Name From Function Description hold GND Pin /STROBE HostBusy Host busy signal.

  • Page 16: Usb (Universal Serious Bus)

    EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A 1.3.3 USB (Universal Serious Bus) 1.3.4 Miscellanea Following shows specification. 1.3.4.1 Preventing Hosts from Data Transfer Time-out Standard: Generally, hosts abandon data transfer to peripherals when a peripheral is in busy state Universal Serial Bus Specifications Revision 1.0...

  • Page 17: Ieee 1284.4 Protocol

    EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A 1.3.4.3 IEEE 1284.4 protocol The packet protocol described by IEEE1284.4 standard always a device to carry on multiple exchanges or conversations which contain data and/or control information with another device at the same time across a single point-to-point link. The protocol is not, however, a device control language.

  • Page 18: Control Specification

    1 lock type switch and 4 LEDs. The appearance of the control panel differs between Stylus Photo 720 and Stylus Photo EX3, but the number of buttons and Load/ Eject Start the ink cartridge replacement sequence.

  • Page 19: Code Page Selection/ Parallel I/F Ieee1284.4 Setting

    EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A 1.4.2.1 Code Page Selection/ Parallel I/F IEEE1284.4 Setting *Note Table 1-10. Panel Function with Turning the Power On On this setting mode, you can select code page table (PC437 or PC850) and parallel I/F...

  • Page 20: Special Setting Mode

    EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A 1.4.2.2 Special Setting Mode 1.4.3 LED Indications You can go to the special setting mode by the following operations. See the table below for more detailed LED indications. Since LED indicates the various errors and current printer operations, LED indications enable to find out the Turn on the power while pressing the Load/ Eject button and ink maintenance button.

  • Page 21: Initialization

    EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A 1.4.4 Initialization 1.4.5 Errors Ink Out The printer have 3 types of initialization. The initialization operations executed by each When the printer almost runs out the ink of any one color, it warns ink-low and initialization method are described below.

  • Page 22: Paper

    EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A 1.5 Paper Envelope Size: No.10 (241.3 mm x 104.8 mm) 1.5.1 Paper handling DL (220 mm x 110 mm) C6 (162 mm x 114 mm) Do not perform reverse feed more than 9.5mm (0.38”).
  • Page 23 EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A Paper quality: Bond paper, Plain paper, Air mail STYLUS PHOTO EX3 *Envelope printing is only available at normal temperature. Additional following items to the Stylus Photo 720 specification; *Keep the longer side of the envelope horizontally at setting.

  • Page 24: Printable Area

    EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A 1.5.3 Printable Area Table 1-15. Character Mode Cut Sheet LM (Left RM (Right TM (Top BM (Bottom Paper Size Margin) min. Margin) min. Margin) min. Margin) min. 3mm (0.12”) 3mm (0.12”)
  • Page 25 EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A Envelope Printable Area Printable Area Figure 1-8. Printable Area for Envelopes Table 1-17. Envelope Margin Left Margin Right Margin Top Margin Bottom Margin Size (minimum) (minimum) (minimum) (minimum) 3 mm (0.12”) 28 mm (1.10”)

  • Page 26: Ink Cartridge

    EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A 1.5.4 Ink Cartridge COLOR INK CARTRIDGE Type: Exclusive cartridge INK CARTRIDGE (BLACK) Color: Magenta, Cyan, Yellow Type: Exclusive cartridge Print capacity: 300 pages/A4 (360 dpi, 5% duty each color)

  • Page 27: Physical Specification

    EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A 1.6 Physical Specification Dimensions Stylus Photo 720: 429 x 268 x 168 mm (WxDxH) Stylus Photo EX3: 546 x 275 x 172 mm (WxDxH) 760.73 545.53 Figure 1-12. Stylus Photo EX3 Dimensions...

  • Page 28: Consumables And Options

    EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A 1.7 Consumables and Options The consumables for this printer are following; Table 1-18. Consumables Classification Name S020187 Ink Cartridge (black) Consumables S020193 Ink Cartridge (color) Product Description Consumables and Options...

  • Page 29: Operating Principles

    C H A P T E R OPERATING PRINCIPLES...

  • Page 30: Overview

    7.8Ω 8.8Ω 8.8Ω (coil resistance) Stylus Photo 720 / Stylus Photo EX3 is based on Stylus Photo 700 / Stylus Photo EX ASF unit Quiet noise type Quiet noise type and the basic specifications for its mechanism are almost same as Stylus Photo 700 /...
  • Page 31 EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A Paper Loading Mechanism CR Unit CR Mechanism (Printhead) CR Motor Paper Feed Capping Position Trigger Lever Position Ink System PF Motor Paper Feeding Mechanism Mechanism CR Lock Mechanism Pump Mechanism Figure 2-1.

  • Page 32: Printhead

    Element). In order to uniform the amount of ejecting ink, each printhead has its own head ID (10 figures for Stylus Photo 720 / Stylus Photo EX3) which adjust PZT voltage drive features. The printhead stores the head ID to EEPROM and generates Filter appropriate PZT drive voltage to prevent amount of ink from varying by printheads.

  • Page 33: Printing Process

    EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A 2.1.2.1 Printing Process Ink Path Ink Cavity This section explains the process in which the printheads of On-Demand inkjet printers eject ink from each nozzle. Normal State: When no printing signal is sent from PC, or no PZT drive voltage is applied, PZT does not change shape, therefore PZT does not squeeze the cavity.

  • Page 34: Printing Method

    EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A 2.1.2.2 Printing Method For print dot system, Stylus Photo 720 / Stylus Photo EX3 has the following two types of printing modes. Multiple shot printing Variable dot printing The above two printing modes are automatically selected depending on the media and the resolution setting.

  • Page 35: Carriage Mechanism

    EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A 2.1.3 Carriage Mechanism 2.1.3.1 Platen Gap (PG) Adjustment Mechanism The PG adjustment mechanism is designed to keep the platen gap correct for the paper The carriage mechanism consists of carriage motor (CR motor), carriage unit thickness to prevent ink from smearing.

  • Page 36: Paper Feeding Mechanism

    Gear 12.4, 28 PF Roller Front Paper Guide Stylus Photo 720 / Stylus Photo EX3 allows printing up to the last 3mm like Stylus Spur Gear 36 Photo 750 / Stylus Photo 1200. The star-wheel roller assembly has been shifted 5 degrees from directly on the top of the eject roller towards the paper feed roller.

  • Page 37: Paper Loading Mechanism (Asf Unit)

    EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A 2.1.5 Paper Loading Mechanism (ASF Unit) When the PF motor torque is switched to the ASF unit side by the disengage mechanism, the function of the ASF mechanism varies depending on the rotational The paper loading mechanism is positioned at the printer rear and consists of paper direction of the PF motor, as shown in the table below.
  • Page 38 EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A Torque sent from the ASF/Pump motor to the ASF unit via the disengage mechanism. When the printer is powered on, the CR unit moves to the DE lever switching position ASF paper loading sequence is described below.

  • Page 39: Ink System Mechanism

    EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A 2.1.6 Ink System Mechanism Figure 2-9 shows the operating principles of the pump mechanism. Ink system mechanism consists of pump unit (including CR lock mechanism) and capping mechanism. Counterclockwise...

  • Page 40: Capping Mechanism

    Capping mechanism moves up when the CR unit moves to the right end of the CR When sucking ink only inside the cap (false absorption), Stylus Photo 720 / Stylus guide shaft and covers the printhead nozzle plate.

  • Page 41: Ink Sequence

    EEPROM and no initial ink charge will be performed next time the wiper.) power is turned on. Stylus Photo 720 / Stylus Photo EX3 takes 85 seconds to complete initial ink charge sequence. -Flashing operation (Prevents color from mixing. Stabilizes ink surface inside the...

  • Page 42: Electrical Circuit Operating Principles

    2.2 Electrical Circuit Operating Principles 2.2.1 C301PSB/PSE Board The power supply boards of Stylus Photo 720 / Stylus Photo EX3 use a RCC (Ringing The electric circuit of the Stylus Photo 720 / Stylus Photo EX3 consists of the Chalk Converter) circuit, which generates +42VDC for drive line and +5VDC for logic following boards.
  • Page 43 EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A +5V line constant voltage control circuit: The output level of the +5VDC line voltage is monitored by the regulator IC51. If P S C S i g n a l...

  • Page 44: C301Main Board

    EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A 2.2.2 C301MAIN Board The printer mechanism is controlled by C301MAIN. The 3.3V regulator IC 16 is mounted on the MAIN board and generates +3.3V from 5V. +3.3V is to drive the main elements on the logic circuit.

  • Page 45: Main Elements

    EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A 2.2.2.1 Main elements Head common driver circuit (Common driver IC15 & Wave amplifier transistor Q2, 3) Table 2-8 shows the main elements on C301MAIN. Nozzle selector IC on the printhead driver board.
  • Page 46 EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A Head common driver circuit + 5 V G N D The reference head drive waveform is produced in the common driver (IC15) + 4 2 G N D based on the following 12 signal lines output from the ASIC (IC2); A0-A4, CLK1, G N D CLK2, FLOOR, RST, DATA, DCLK, and E.

  • Page 47: Pf Motor (Pf/ Pump/ Asf Motor) Driver Circuit

    EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A 2.2.2.3 PF Motor (PF/ PUMP/ ASF Motor) Driver Circuit + 5 V L B 1 1 8 4 7 E 0 5 B 7 0 * * The motor driver IC (IC14) on C301MAIN drives PF/ PUMP/ ASF motor. Stylus...

  • Page 48: Cr Motor Driver Circuit

    C301MAIN board to monitor the two voltages: +5V for the logic Stylus Photo 720 / Stylus Photo EX3 uses 4-phase 200-pole hybrid type stepping motor line and +42V for the drive line. When each circuit detects abnormality on the and performs constant current bi-polar drive.

  • Page 49: Eeprom Control Circuit

    EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A 2.2.2.6 EEPROM Control Circuit EEPROM is connected to ASIC with 4 lines and each line has the following function. Chip selection signal Since EEPROM is nonvolatile memory, it keeps written information if the printer power is turned off.

  • Page 50: Sensor Circuit

    EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A 2.2.2.7 Sensor Circuit The block diagram for the sensor circuit is shown below: C301MAIN is equipped with the following five sensors to detect the status of the printer. A SFV...

  • Page 51: Troubleshooting

    C H A P T E R TROUBLESHOOTING...

  • Page 52: Overview

    EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A 3.1 Overview Table 3-2. Sensor Check Point Sensor Name Check Point Signal Level Switch Mode This chapter describes how to identify troubles in two levels: unit level repair and component level repair.
  • Page 53 EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A Table 3-3. Error Indication LED Indication Condition Remedy Paper Ink End Ink End Power Check (Black) (Color) No Paper Set paper Paper Jam Blink Remove jammed paper Ink End /...

  • Page 54: Unit Level Troubleshooting

    EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A 3.2 Unit Level Troubleshooting 3.2.1 Printer does not operate at power on Start You can identify the troubles, using flowcharts in this section and then find defective unit. When you find out defective unit, refer to “Unit Repair (Printer Mechanism)” to find defective components and replace them.

  • Page 55: Error Is Detected

    EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A 3.2.2 Error is detected 3.2.3 Failure occurs during printing Start Start Print a self test. Check the LCD error message.             ...

  • Page 56: Printer Does Not Feed Paper Correctly

    EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A 3.2.4 Printer does not feed paper correctly 3.2.5 Control panel operation is abnormal START START Paper Control loaded correctly panel connected in ASF? correctly? Set the paper correctly. Connect the control panel correctly.

  • Page 57: Unit Repair (Power Supply Board)

    EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A 3.3 Unit Repair (Power Supply Board) Table 3-5. Repair of the Power Supply Board Symptom Condition Cause Check point Solution This section provides in-depth information for repairing the power supply board so that Check the output waveform (pin you can repair the board to the small parts level.

  • Page 58: Unit Repair (Control Board)

    EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A 3.4 Unit Repair (Control Board) Table 3-6. Repair of the Control Board Symptom Condition Cause Check point Solution This section provides in-depth information for repairing C301MAIN board so that you Check the PHASE (Pin 16 can repair the board to the small parts level.
  • Page 59 EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A Table 3-6. Repair of the Control Board Symptom Condition Cause Check point Solution Check the PHASE (Pin 16,27) of IC 14, and signal waveform of OUT (Pin 7,6,9,8). If PHASE...

  • Page 60: Unit Repair (Printer Mechanism)

    EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A 3.5 Unit Repair (Printer Mechanism) Table 3-7. Repair of the Printer Mechanism Symptom Condition Cause Check Point Solution This section provides in-depth information for repairing the printer mechanism so that -Does panel LED you can repair the printer mechanism to the small parts level.
  • Page 61 EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A Table 3-7. Repair of the Printer Mechanism Table 3-7. Repair of the Printer Mechanism Symptom Condition Cause Check Point Solution Symptom Condition Cause Check Point Solution -Check if the drive...
  • Page 62 EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A Table 3-7. Repair of the Printer Mechanism Table 3-7. Repair of the Printer Mechanism Symptom Condition Cause Check Point Solution Symptom Condition Cause Check Point Solution Perform cleaning Bi-directional...
  • Page 63 EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A Table 3-7. Repair of the Printer Mechanism Table 3-7. Repair of the Printer Mechanism Symptom Condition Cause Check Point Solution Symptom Condition Cause Check Point Solution Clean the LD...

  • Page 64: Disassembly And Assembly

    C H A P T E R DISASSEMBLY AND ASSEMBLY...

  • Page 65: Overview

    EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A 4.1 Overview 4.1.2 Tools Use only specified tools to avoid damaging the printer. This section describes procedures for disassembling the main components of Stylus Photo 720 / Stylus Photo EX3. Unless otherwise specified, disassembly units or Table 4-1.

  • Page 66: Work Completion Check

    EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A 4.1.3 Work Completion Check Table 4-2. Check List Classifi- If any service is made to the printer, use the checklist shown below to confirm all Item Check Point Status cation works are completed properly and the printer is ready to be returned to the user.

  • Page 67: Disassembly

    EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A 4.2 Disassembly The flowchart below shows step-by-step disassembly procedures. When disassembling each unit, refer to the page number shown in the figure. Housing Removal Page 68 ASF Assy. Circuit Board Assy.

  • Page 68: Housing Removal

    EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A 4.2.1 Housing Removal Since this printer has no lower Housing, the Printer Mechanism is exposed just by removing the Housing. Open the Printer Cover and set the PG Adjust Lever to (+) position.

  • Page 69: Circuit Board Assembly Removal

    EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A 4.2.2 Circuit Board Assembly Removal When removing each board unit from M/B Shield Plate, remove screws securing each board (C301MAIN Board: 10 screws, C301PSB/PSE: 4 screws) and remove the Remove the Housing.
  • Page 70 EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A A D J U S T M E N T After replacing C301MAIN Board, perform the following R E Q U I R E D adjustments. Head ID Input (See “Head Voltage ID Input” on page 101) Bi-D Adjustment (See “Bi-Directional Adjustment”...

  • Page 71: Control Panel Removal

    EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A 4.2.3 Control Panel Removal S h i e l d P l a t e , P a n e l Panel Shield Plate Remove the Housing. (See“Housing Removal” on page 68)

  • Page 72: Ink Absorber Tray Assembly (Waste Ink Pad) Removal

    EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A 4.2.4 Ink Absorber Tray Assembly (Waste Ink Pad) Waste Ink Pad Assembly Removal Securing Screw Remove the Housing.(See “Housing Removal” on page 68) Remove the Control Panel. (See “Control Panel Removal” on page 71) Remove one screw securing the Ink Absorber Tray Assembly to the right side of the Printer Mechanism.

  • Page 73: Printer Mechanism Disassembly

    EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A 4.2.5 Printer Mechanism Disassembly When removing the Head FFCs from the Printhead Board, do C A U T I O N not pull two FFCs together. As shown in the figure below, one of 4.2.5.1 Printhead Removal...
  • Page 74 EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A Be sure that the Head Grounding Plate is installed to the Install a new cartridge before sending back the printer to the C H E C K C H E C K carriage correctly.

  • Page 75: Pump Assembly / Cap Assembly Removal

    EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A 4.2.5.2 Pump Assembly / Cap Assembly Removal Loosen 2 screws at the R/L Remove the Housing. (See “Housing Removal” on page 68) Frame and lift up the Paper Eject Frame Assembly.
  • Page 76 EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A I n k T u b e R o u t i n g F r o m Since the spring is included among the gears in the Pump...

  • Page 77: Cr Motor Assembly Removal

    EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A 4.2.5.3 CR Motor Assembly Removal Remove the Housing.(See “Housing Removal” on page 68) Rotate Combination Gear, 12.4, 28 toward the front of the printer and disengage the CR Lock Lever. Then, manually move the CR Assembly to the center of the platen.

  • Page 78: Pf Motor Assembly Removal

    EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A 4.2.5.4 PF Motor Assembly Removal Remove the Housing. (See “Housing Removal” on page 68) Paper Eject Frame Securing Screws (2 screws) Remove the Ink Absorber Tray Assembly. (See “Ink Absorber Tray Assembly (Waste Ink Pad) Removal”...
  • Page 79 EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A Remove 3 Hexagon Nuts and shift the PF Motor Assembly to the front side of the printer to remove it. (Refer to Figure 4-18.) PF Motor Pinion Shaft PF Motor...

  • Page 80: Asf Assembly Removal

    Release the hook and remove the Spur Gear 34 from the Roller Shaft of the ASF ASF Securing Screw Securing Screw with Washer Assembly. The fixing hook position of Spur Gear 34 differs between Stylus Photo 720 and Stylus Photo EX3 as shown in the figure below. Stylus Photo 720 Spur Gear 34 Securing Hook Figure 4-21.
  • Page 81 EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A When installing the ASF Assembly, make sure that the When installing the ASF Assembly, be careful not to pinch any C H E C K C A U T I O N protrusion at the right side of ASF Assembly is firmly inserted motor or sensor cables under the ASF.

  • Page 82: Asf Ld Roller Assembly Removal

    EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A 4.2.5.6 ASF LD Roller Assembly Removal Push the LD Roller Shaft to the left and remove the ASF HP Detection Wheel from the end of the shaft. (Refer to Figure 4-26.) Remove the ASF Assembly.
  • Page 83 EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A Release the protrusion of the ASF Frame from the ASF Hopper Assembly installation Align the right cam part of the ASF Hopper Assembly to the cutoff (rectangle) of the point at the upper left.
  • Page 84 EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A The following is the ASF Assembly exploded diagram. During disassembly and assembly of the ASF Hopper Assembly, C H E C K do not let the grease on the cam parts touch other parts. Wipe off...
  • Page 85 EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A When installing the Right LD Roller Assembly to the ASF C H E C K Frame, make sure the Right LD Roller Assembly is locked by the P O I N T hook on the back of the right side of the ASF Frame.
  • Page 86 EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A Screw Fixing Hooks Compression Spring 1.961 Figure 4-34. Compression Spring 1.961 Temporary Fixing Position Disassembly and Assembly Disassembly...

  • Page 87: Ld Roller Assembly Disassembly

    EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A 4.2.5.7 LD Roller Assembly Disassembly LD Roller Cover Remove the ASF Assembly. (See “ASF Assembly Removal” on page 80) (Right and Left) Compression Spring 1.961 Remove the LD Roller Assembly. (See “ASF LD Roller Assembly Removal” on...

  • Page 88: Cr Assembly Removal

    EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A 4.2.5.8 CR Assembly Removal Release 2 PG Lever securing hooks from the Right Frame and remove the PG Lever. Remove the Housing. (See “Housing Removal” on page 68) Push the Driven Pulley Holder to the right (seen from the front side of the printer) to PG Lever loosen the Timing Belt and detach the Timing Belt from the CR Motor Pinion Gear.
  • Page 89 EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A A D J U S T M E N T Perform following adjustments after removing the Carriage R E Q U I R E D Right Parallelism Adjust Assembly.

  • Page 90: Pe Sensor Assembly Removal

    EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A 4.2.5.9 PE Sensor Assembly Removal Remove the Housing. (See “Housing Removal” on page 68) C H E C K When installing the PE Sensor Assembly, make sure that the sensor P O I N T lever is correctly inserted into the hole of Paper Guide Assembly.

  • Page 91: Pf Roller Assembly Removal

    Remove the Torsion Spring117.6 from the rear side of the Top Frame and remove the Upper Paper Guide Assembly toward the rear side of the printer. The number of the Upper Paper Guide Assemblies differs between Stylus Photo 720 and Stylus Photo EX3. (Stylus Photo 720: 5, Stylus Photo EX3:7) When removing the Right Paper Guide Assembly, be careful for PE Sensor Lever Head and remove it toward the front side of the printer.
  • Page 92 EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A Release hooks securing the Left Bushing 12 to the Left Frame and rotate the Left Bushing 12 to the front side of the printer. Align the protrusion of the Left Bushing 12 and the cutoffs of the frame.

  • Page 93: Cr Hp Sensor Removal

    EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A 4.2.5.11 CR HP Sensor Removal Remove the Housing. (“Housing Removal” on page 68) Disconnect the cable from the CR HP Sensor and remove it by releasing its hook. CR HP Sensor Sensor Securing Hook Figure 4-49.

  • Page 94: Adjustment

    C H A P T E R ADJUSTMENT...

  • Page 95: Overview

    EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A 5.1 Overview This chapter describes the procedure for adjustments required when the printer is disassembled and assembled for repair or service. 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.

  • Page 96: Adjustment

    EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A 5.2 Adjustment Move the carriage to the center and set the thickness gauge (1.14mm thick) on the flat face of the specified rib of the Front Paper Guide as you see in the figure5-1. Perform the PG Adjustment from the Right (HP side) Front Paper Guide.
  • Page 97 EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A Adjust until the thickness gauge stars moving with the carriage. From the point where the thickness gauge stars moving with the carriage, move the Right Parallelism Adjust Bushing by one notch toward you. (Gap will be widen.) At this point, make sure that the thickness gauge does not move.

  • Page 98: Adjustment By Adjustment Program

    This adjustment program is in the 3.5 2HD FD. The first FD is the installer disk. When you execute Setup.exe, the installation of the program will be started under Windows Head angular adjustment Adjustment 95/98. After installation is completed, the Stylus Photo 720 EX3 for Win95 (or Win98) Bi-Directional adjustment → →...

  • Page 99: Adjustment Program Initial Setting Screen

    EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A 5.3.3 Adjustment Program Initial Setting Screen Before entering the main menu, you have to do the following. Select the model name. Select the market destination. Follow the procedure below to do initial settings.

  • Page 100: Market Destination Check

    EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A When you click “OK” in the screen in Figure 5-6, the screen below appears. 5.3.4 Market Destination Check If you want to check the model name, select “Check this model name” and click “OK”.

  • Page 101: Head Voltage Id Input

    EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A 5.3.5 Head Voltage ID Input Before replacing the MAIN board, select “Check present data” in the screen above and click “OK”: You can check the present head voltage ID stored in EEPROM. If you With this program, you can adjust the driving characteristics of the PZT for each head replace the MAIN board, go to the step 3.
  • Page 102 EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A To input the new head voltage ID, select “Change data” in the screen in Figure 5-9 and When the head voltage ID is correctly input, the following screen appears.

  • Page 103: Head Angular Adjustment

    EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A 5.3.6 Head Angular Adjustment Select “Head angular adjustment” from the adjustment program main menu. The following screen appears. During production, slight variations are created in the printhead and carriage (which is used as a printhead base).
  • Page 104 EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A Check the print pattern. If the pattern of the light cyan is NOT aligned at the center At the head angular adjustment position, loosen the screw securing the printhead and between two black patterns, select “Move the carriage to the adjustment position”.
  • Page 105 EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A Look very closely at the black / cyan lines of the head angular adjustment pattern and move the adjustment lever to center the cyan lines between the black lines. The figure below shows how to move the lever to correct a misaligned pattern.

  • Page 106: Bi-Directional Adjustment

    EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A 5.3.7 Bi-Directional Adjustment Select “Print the Bi-D adjustment pattern” and click “OK”. The following screen appears and the Bi-D adjustment pattern will be printed. 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.
  • Page 107 EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A Click “Previous”. The screen goes back to the Bi-d Adjustment main menu (Figure Select either print mode which requires to be adjusted and click “OK”. The following 5-19). screen appears.
  • Page 108 EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A NOTE: You can check the present adjustment data by selecting “Check present adjustment data” from the Bi-Directional adjustment main menu (Figure 5-19) and clicking “OK”. Figure 5-24. Check Present Adjustment Data...

  • Page 109: Usb Id Check/Input

    Revision A 5.3.8 USB ID Check/Input Perform this adjustment when the MAIN board is replaced. Stylus Photo 720 / Stylus Photo EX3 stores 18 digit USB ID special to the machine in EEPROM on the MAIN board. USB ID is the data used when the USB port is generated when the printer is connected to the PC.

  • Page 110: Head Cleaning

    EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A Check the serial number labeled on the back of the printer upper case and input 10 digit 5.3.9 Head Cleaning serial number. After inputting the serial number, click “OK” and the rest 8 digit will be This item is selected from the maintenance program main menu.

  • Page 111: Initial Ink Charge

    EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A 5.3.10 Initial Ink Charge 5.3.11 Protection Counter Check/Clear Ink is not charged in the ink path of a spare printhead and printer mechanism. This function is to check and clear the protection counter value of the Waste Ink Pad.
  • Page 112 EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A If the counter value reaches 25000 points, replace the Waste Ink Pad (Ink Absorber) and clear the protection counter. The procedure to clear the protection counter is described in step 5.

  • Page 113: Print A4 Pattern

    EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A 5.3.12 Print A4 Pattern “Print A4 pattern” UI is shown below. Click “OK”. The A4 pattern will be printed. This function is to check the adjustment result comprehensively on the plain paper. By performing this function, the following items are printed.

  • Page 114: Maintenance

    C H A P T E R MAINTENANCE...

  • Page 115: Overview

    EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A 6.1 Overview This section provides information to maintain the printer in its optimum condition. 6.1.1 Cleaning This printer has no mechanical components which require regular cleaning except the printhead. Therefore, when returning the printer to the user, check the following parts and perform appropriate cleaning if stain is noticeable.

  • Page 116: Service Maintenance

    EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A 6.1.2 Service Maintenance Maintenance Request Error Ink is used for cleaning operation as well as printing. When ink is used for If any abnormal print (dot missing, white line, etc.) has occurred or the printer indicates cleaning, the ink is drained to Waste Ink Pad (Ink Absorber Tray Assembly) and “Maintenance Request Error”, take the following actions to clear the error.

  • Page 117: Lubrication

    EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A 6.1.3 Lubrication Table 6-2. Lubrication Point Lubrication Type/Point Remarks The characteristics of the oil or grease have great affects on the mechanical function and durability, especially does the characteristics about temperature environment. The •...
  • Page 118 EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A Table 6-2. Lubrication Point Table 6-2. Lubrication Point Lubrication Type/Point Remarks Lubrication Type/Point Remarks • For the right bushing (pump • Evenly apply inside the hole. <Lubrication Point> <Lubrication Point>...
  • Page 119 EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A No.5 No.4 Combination Gear 16, 40.8 Shaft No.2 Spur Gear 23.2 Combination Gear 16.40.8 No.1 No.4 Spur Gear 73.6 No.4 Combination Gear 16, 21.6 No.6 Bush 12 Inside Spur Gear 34 No.3...
  • Page 120 EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A No.12 Driven Pulley CR Oil Pad Holder Amount of Oil: 0.7cc (Never apply more than specified.) Carriage No.8 ASF Hopper CR Guide Shaft Assembly No.10 Flags Dispenser CR Unit No.13...

  • Page 121: Appendix

    C H A P T E R APPENDIX...

  • Page 122: Connector Summary

    EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A 7.1 Connector Summary Table 7-1. Connector Summary for C259Main Connector Function Table to refer. 7.1.1 Major Component Unit Refer to “IEEE-1284 Parallel I/F Parallel Interface Connector (Forward Channel)” on page 13 Major component unit of this printer is as follows.
  • Page 123 EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A Table 7-6. Connector CN8 Table 7-4. Connector CN6 Signal Name Function Signal Name Function GND2 Ground Sensor detect signal PZT drive signal Ground PZT drive signal ASFV Sensor power supply PZT drive signal Table 7-5.
  • Page 124 EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A Table 7-8. Connector CN10 Table 7-10. Connector CN12 Signal Name Function Signal Name Function +42V Mechanism drive power supply Phase drive signal (A) +42V Mechanism drive power supply CR-A...

  • Page 125: Eeprom Address Map

    EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A 7.1.2 EEPROM Address Map Table 7-11. EEPROM Address Map (continued) QPIT Factory Address Explanation Settings Table 7-11. EEPROM Address Map Settings Settings QPIT Factory CPSI password Address Explanation Settings...
  • Page 126 EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A Table 7-11. EEPROM Address Map (continued) Table 7-11. EEPROM Address Map (continued) QPIT Factory QPIT Factory Address Explanation Settings Address Explanation Settings Settings Settings Settings Settings Reserved for Password...
  • Page 127 EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A Table 7-11. EEPROM Address Map (continued) Table 7-11. EEPROM Address Map (continued) QPIT Factory QPIT Factory Address Explanation Settings Address Explanation Settings Settings Settings Settings Settings Reserved Ink counter Cc...
  • Page 128 EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A Table 7-11. EEPROM Address Map (continued) Table 7-11. EEPROM Address Map (continued) QPIT Factory QPIT Factory Address Explanation Settings Address Explanation Settings Settings Settings Settings Settings Head Actuator Rank +1<=n<=+32...

  • Page 129: Component Layout

    EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A 7.2 Component Layout Figure 7-2. C301MAIN Component Layout (Parts Side) Figure 7-3. C301MAIN Component Layout (Soldered Side) Appendix Component Layout...
  • Page 130 EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A Figure 7-6. C209PNL Component Layout Figure 7-4. C301PSB Component Layout Figure 7-7. C366PNL Component Layout Figure 7-5. C301PSE Component Layout Appendix Component Layout...

  • Page 131: Exploded Diagram

    EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A 7.3 Exploded Diagram Stylus Photo 720 127 for color version without color version for color version without color version No.1 PM-760C/CB/CT/CS Rev.01 10165 Figure 7-8. Stylus Photo 720 Exploded Diagram 1...
  • Page 132 EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A 743 745 without 747,748 with 581 590 573 No.2 PM-760C/CB/CT/CS 10165 Rev.01 Figure 7-9. Stylus Photo 720 Exploded Diagram 2 Appendix Exploded Diagram...
  • Page 133 EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A 542 544 542 544 542 544 542 544 589 571 PM-760C/CB/CT/CS No.3 Rev.01 10165 Figure 7-10. Stylus Photo 720 Exploded Diagram 3 Appendix Exploded Diagram...
  • Page 134 EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A PM-760C/CB/CT/CS 10165 Rev.01 No.4 Figure 7-11. Stylus Photo 720 Packing Materials Appendix Exploded Diagram...
  • Page 135 EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A Stylus Photo EX3 for JPN without JPN For JPN for JPN for JPN PM-2200C/EPSON STYLUSPHOTO EX3 No.1 Rev.01 10196 Figure 7-12. Stylus Photo EX3 Exploded Diagram 1 Appendix Exploded Diagram...
  • Page 136 EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A 800 with 723 without 741,745,746,751,753,757 763 715 572 512 705 709 (501) PM-2200C/EPSON STYLUS PHOTO EX3 10196 No.2 Rev.01 Figure 7-13. Stylus Photo EX3 Exploded Diagram 2 Appendix Exploded Diagram...
  • Page 137 EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A 733 756 (502) 527 524 527 524 PM-2200C/EPSON STYLUS PHOTO EX3 No.3 Rev.01 10196 Figure 7-14. Stylus Photo EX3 Exploded Diagram 3 Appendix Exploded Diagram...
  • Page 138 EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A for EHK PACKING MATERIAL FOR PM-2200C/EPSON STYLUS PHOTO EX3 Rev.01 10196 Figure 7-15. Stylus Photo EX3 Packing Materials Appendix Exploded Diagram...

  • Page 139: Parts List

    EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A 7.4 Parts List Table 7-12. Stylus Photo 720 Parts List Ref. No. Description Stylus Photo 720 Compression Spring, 2.94 Spacer, Housing Table 7-12. Stylus Photo 720 Parts List Spacer, Housing, Panel Ref.
  • Page 140 EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A Table 7-12. Stylus Photo 720 Parts List Table 7-12. Stylus Photo 720 Parts List Ref. No. Description Ref. No. Description Connector IC16 Regulator Connector IC17 DRAM Connector Gate Array...
  • Page 141 EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A Table 7-12. Stylus Photo 720 Parts List Table 7-12. Stylus Photo 720 Parts List Ref. No. Description Ref. No. Description Pump Assembly Holder, Star Wheel, Right Cap, Assembly; B...
  • Page 142 EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A Table 7-12. Stylus Photo 720 Parts List Table 7-12. Stylus Photo 720 Parts List Ref. No. Description Ref. No. Description Compression Spring, 19.6 Edgeguide Lever, PG Cork Lever, PG, Sub Slider, Edgeguide Torsion Spring, 63.7...
  • Page 143 EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A Table 7-12. Stylus Photo 720 Parts List Table 7-12. Stylus Photo 720 Parts List Ref. No. Description Ref. No. Description Wheel, Detect Package Lever, Break Pad Set, Printer Pad, Break Pad, Attached Parts Torsion Spring, 41.2...
  • Page 144 EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A Stylus Photo EX3 Table 7-13. Stylus Photo EX3 Parts List Ref No. Description Table 7-13. Stylus Photo EX3 Parts List "SHEET,PROTECT,PANEL" Ref No. Description "COVER,CABLE;B" HOUSING "LABEL,CAUTION;D" FOOT "LABEL,PAPER SET;D"...
  • Page 145 EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A Table 7-13. Stylus Photo EX3 Parts List Table 7-13. Stylus Photo EX3 Parts List Ref No. Description Ref No. Description TIMINGBELT "BUSHING,PARALLELISM ADJUST,LEFT" "PAPER GUIDE,UPPER" "BUSHING,PARALLELISM ADJUST,RIGHT" "PAPERGUIDE,REAR" "LEVER,PG"...
  • Page 146 EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A Table 7-13. Stylus Photo EX3 Parts List Table 7-13. Stylus Photo EX3 Parts List Ref No. Description Ref No. Description RETAINING RING "HOLDER,STAR WHEEL,LEFT" C.B.S. SCREW "PAD ASSY.,LEFT" "PUSHING NUT,2"...
  • Page 147 EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A Table 7-13. Stylus Photo EX3 Parts List Table 7-13. Stylus Photo EX3 Parts List Ref No. Description Ref No. Description "ROLLER ASSY,LD,RIGHT" "TORSION SPRING,49" "POROUSPAD,INKEJECT,LARGE" "TORSION SPRING,41.2" "POROUSPAD,INKEJCT,SMALL" "EXTENSION SPRING,0.088"...
  • Page 148 EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A Table 7-13. Stylus Photo EX3 Parts List Ref No. Description OUTER CARTON BOX "PAD SET,PRINTER" "PAD,ACCESSORY" "PAD,PRINTER,B" "PLASTIC PROTECTIVE BAG,500X900X0.04T" Appendix Parts List...

  • Page 149: Electric Circuit

    EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A 7.5 Electric Circuit The following pages show the following electric circuits. C301MAIN Control Circuit C301PSB Power Supply Circuit C301PSE Power Supply Circuit C209PNL Board Circuit (Stylus Photo 720) C366PNL Board Circuit (Stylus Photo EX3)

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