Epson 680Pro - LQ B/W Dot-matrix Printer Service Manual
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Epson 680Pro - LQ B/W Dot-matrix Printer Service Manual

Color inkjet printer
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SERVICE MANUAL

Color Inkjet Printer
EPSON STYLUS COLOR 680/777/777i
®
SEIJ00010

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Summary of Contents for Epson 680Pro - LQ B/W Dot-matrix Printer

  • Page 1: Service Manual

    SERVICE MANUAL Color Inkjet Printer EPSON STYLUS COLOR 680/777/777i ® SEIJ00010...
  • 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 Color 680/777/777i. 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: Symbols Used In This Manual

    Symbols Used in This Manual Various symbols are used throughout this manual either to provide additional information on a specific topic or to warn of possible danger present during a procedure or an action. Be aware of all symbols when they are used, and always read WARNING, CAUTION or NOTE messages. Indicates an operating or maintenance procedure, practice or condition that, if not strictly observed, could result in injury or loss of life.
  • Page 6 Revision Status Revision Issued Date Description August 10, 2000 First Release Revision: Added disassembly and reassembly caution to 4.2.1 Housing Removal August 31, 2000 Changed the resolution of bit map images when producing PDF files for clearer reading.

  • Page 7: Table Of Contents

    Chapter 1 PRODUCT DESCRIPTION 2.1.1 Printer Mechanism ..............30 2.1.2 Printhead .................. 31 1.1 FEATURES ..................10 2.1.3 Carriage Mechanism ..............33 2.1.4 Paper Feeding Mechanism ............34 1.2 SPECIFICATIONS................11 1.2.1 Physical Specification............... 11 2.1.5 Paper Loading Mechanism (ASF Unit)........35 2.1.6 Ink System Mechanism ............
  • Page 8 5.1.1 Required Adjustment.............. 101 5.1.2 Adjustment Program feature ..........102 5.1.3 Adjustment Program Installation Procedure......103 5.1.4 Adjustment Program Initial Setting menu ....... 103 5.1.5 Head ID Input ................. 103 5.1.6 Bi-D Adjustment ..............105 5.1.7 USB ID input................107 5.1.8 Head Cleaning Operation............

  • Page 9: Chapter 1 Product Description

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

  • Page 10: Features

    EPSON Stylus COLOR 680/777/777i Revision B 1.1 FEATURES The major features of EPSON color inkjet printers EPSON Stylus COLOR 680/777/ 777i are: High Color Print Quality 2880 (H) X 720 (V) dpi printing Four Color Printing (YMCK) Traditional and New Microweave...

  • Page 11: Specifications

    EPSON Stylus COLOR 680/777/777i Revision B 1.2 SPECIFICATIONS Table 1-2. Raster Graphics Mode Horizontal This section covers specifications of the printers. Printable Area Available Dot CR Speed Resolution 360 dpi 8.26 inches 2976 23.8 IPS 1.2.1 Physical Specification 720 dpi 8.26 inches...

  • Page 12: Paper Feeding

    EPSON Stylus COLOR 680/777/777i Revision B 1.2.3 Paper Feeding [220 240V Version] Rated Voltage: AC220V 240V Feed Method Input Voltage Range: AC198 264V Rated Frequency Range: 50 60Hz Friction feed with ASF Input Frequency Range: 49.5 60.5Hz Paper Path Rated Current: 0.2 A (for Stylus Color 860)

  • Page 13: Environmental Condition

    EPSON Stylus COLOR 680/777/777i Revision B 1.2.6 Environmental Condition 1.2.7 Reliability Temperature Total Print Volume: 50,000 pages (A4, Letter) or 5 years although less than 50.000 pages printing Operating: 10 to 35 C (see the figure below for condition) Print Head Life:...

  • Page 14: Interface

    EPSON Stylus COLOR 680/777/777i Revision B 1.3 INTERFACE DATA data byte n data byte n+1 The EPSON Stylus COLOR 680/777/777i provide USB and parallel interface as hold standard. -STROBE next 1.3.1 Parallel Interface (Forward Channel) setup BUSY Transmission Mode: 8 bit parallel, IEEE-1284 compatibility mode...
  • Page 15 EPSON Stylus COLOR 680/777/777i Revision B Table 1-4. Typical Time of tack Table 1-6. Connector Pin Assignment and Signals Parallel I/F Mode Typical Time of tack Return Pin No. Signal Name In/Out Functional Description GND Pin High Speed 0.5us The strobe pulse. Read-in of data is...
  • Page 16 EPSON Stylus COLOR 680/777/777i Revision B Table 1-6. Connector Pin Assignment and Signals (continued) Return Pin No. Signal Name In/Out Functional Description GND Pin Pulled up to +5V via 3.3K ohm resistor. Chassis GND Chassis GND 16,33, Signal GND 19-30...

  • Page 17: Parallel Interface (Reserve Channel)

    EPSON Stylus COLOR 680/777/777i Revision B 1.3.2 Parallel Interface (Reserve Channel) Table 1-7. Connector Pin Assignment and Signals (continued) Return Transmission Mode: IEEE-1284 nibble mode Pin No. Signal Name In/Out Functional Description GND Pin Adaptable Connector See forward channel. Synchronization:...

  • Page 18: Usb Interface

    EPSON Stylus COLOR 680/777/777i Revision B 1.3.3 USB Interface Device ID: The printer sends the following device ID string when requested. Standard: Based on: “Universal Serial Bus Specifications Rev. 1.0” When IEEE1284.4 is enabled, “Universal Serial Bus Device Class Definition [00H] [5AH] for Printing Devices Version 1.0”...

  • Page 19: Prevention Of Data Transfer Time-Out

    EPSON Stylus COLOR 680/777/777i Revision B 1.3.4 Prevention of Data Transfer Time-out An initial state is IEEE1284.4 communication and data that received it by the time Generally, hosts abandon data transfer to peripherals when the peripheral is in the busy it is able to take synchronization by magic string (1284.4 synchronous commands)

  • Page 20: Operator Controls

    EPSON Stylus COLOR 680/777/777i Revision B 1.4 OPERATOR CONTROLS 1.4.2.2 Indicators (1) Power Lights when the operating switch is “ON” and AC power is supplied. 1.4.1 Operating Switch (2) Error Operating switch is located on the control panel. Lights or blinks when some error has occur to the printer.

  • Page 21: Panel Functions

    EPSON Stylus COLOR 680/777/777i Revision B 1.4.3 Panel Functions Table 1-11. Special Setting Mode Switch Function Table 1-9. Panel Functions • Initialize EEPROM. Maintenance Switch Function • Reset the ink overflow counter in the Ink Cartridge replacement EEPROM. • Loads or Ejects the Paper (Pushing within 3seconds).

  • Page 22: Printer Condition And Panel Status

    EPSON Stylus COLOR 680/777/777i Revision B 1.4.4 Printer Condition and Panel Status 1.4.5 Printer Initialization There are three kinds of initialization methods, and the following explains each Table 1-12. Printer Condition and LED Status initialization. Indicators Printer Status Priority Power-on Initialization...

  • Page 23: Errors

    EPSON Stylus COLOR 680/777/777i Revision B 1.4.6 Errors Ink Out When the printer runs out most of the ink of any color, it indicates ink-low and keeps printing. When the printer runs out the whole ink of any color, it stops printing and indicates ink-out error.

  • Page 24: Paper

    EPSON Stylus COLOR 680/777/777i Revision B 1.5 PAPER 1.5.2.2 Transparency, Glossy Paper [Size] 1.5.1 Paper Handling Width 210mm (8.3”) x Length 297mm (11.7”) Letter: Width 216mm (8.5”) x Length 279mm (11.0”) Do not perform reverse feed more than 1.8mm (0.07”).
  • Page 25 EPSON Stylus COLOR 680/777/777i Revision B [Quality] Bond paper, Plain paper, Air mail Note1: Envelope printing is available only at normal temperature. Note 2: Keep the longer side of the envelope horizontally at setting. Note 3: Envelope printing is available only in the normal temperature.

  • Page 26: Printing Area

    EPSON Stylus COLOR 680/777/777i Revision B 1.5.3 Printing Area Table 1-13. Printing Area Left Margin Right Margin Top Margin Bottom Margin 1.5.3.1 Cut Sheet Paper Size (min.) (min.) (min.) (min.) See the figure below and tables on the right for printable areas.
  • Page 27 EPSON Stylus COLOR 680/777/777i Revision B 1.5.3.2 Envelopes Printable Area Figure 1-7. Printable Area for Envelopes Table 1-14. Envelope Margin Left Margin Right Margin Top Margin Bottom Margin Size (min.) (min.) (min.) (min.) 3 mm (0.12”) 28 mm (1.10”) 3 mm (0.12”) 14 mm (0.55”)

  • Page 28: Ink Cartridge

    EPSON Stylus COLOR 680/777/777i Revision B 1.6 INK CARTRIDGE 1.6.2 Color Ink Cartridge Type: Exclusive Cartridge Color: Magenta, Cyan, Yellow 1.6.1 Black Ink Cartridge Print Capacity: 300 pages / A4 (360 dpi, 5% duty each color) Ink Life: 2 years from date of production...

  • Page 29: Chapter 2 Operating Principles

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

  • Page 30: Overview

    Carriage Lock Mechanism). Paper separation pad Like other EPSON ink jet printers, the Stylus COLOR 680/777/777i is equipped with two stepping motors; one for ASF, Paper feeding/ Pump mechanism, and one for CR mechanism. ASF unit uses rear entry front eject system. This ASF unit is also designed ASF Hopper Spring newly and single LD roller loads the paper to the printer mechanism.

  • Page 31: Printhead

    EPSON Stylus COLOR 680/777/77i Revision B 2.1.2 Printhead CSIC Nozzle Selector Board The printhead uses a new developed U-CHIPS head and Stylus COLOR 680/777/777i can perform multiple shot printing and variable printing. Ink Cartridge The CSIC is mounted on the ink cartridge. By storing ink life data, this IC makes it...
  • Page 32 EPSON Stylus COLOR 680/777/77i Revision B 2.1.2.1 Printing Process 2.1.2.2 Printing Method This section explains the process in which the printheads of On-Demand inkjet printers For print dot system, Stylus COLOR 680/777/777i has the following two kinds of eject ink from each nozzle.

  • Page 33: Carriage Mechanism

    EPSON Stylus COLOR 680/777/77i Revision B 2.1.3 Carriage Mechanism CR home position is detected with the HP/PE/IC sensor and the detection plate molded The carriage mechanism consists of Carriage motor (CR motor), Carriage unit in the CR unit as following figure. When the CR home position is detected with this (including printhead), CR timing belt, CR guide shaft, CR guide frame, CR home sensor, HIGH signal is output to the CPU.

  • Page 34: Paper Feeding Mechanism

    EPSON Stylus COLOR 680/777/77i Revision B 2.1.4 Paper Feeding Mechanism Table 2-2. PF Motor Specifications Item Description The paper feeding mechanism consists of Paper feed motor (PF motor), PF roller, Paper eject roller, Star wheel roller, and so on. The paper feeding mechanism feeds...

  • Page 35: Paper Loading Mechanism (Asf Unit)

    EPSON Stylus COLOR 680/777/77i Revision B 2.1.5 Paper Loading Mechanism (ASF Unit) Transfer the PF motor drive to LD roller PF Motor pinion gear rotates CW direction Combination Gear 16, 21.6 (CCW) The Paper loading mechanism is positioned at the printer rear. The Paper loading Spur Gear 73.6 (CW)
  • Page 36 EPSON Stylus COLOR 680/777/77i Revision B Step1 Step3 Spur gear 35.2 Step2 NOTE: Clutch gear Tension spring 0.143 Change Lever LD roller shaft The Clutch gear is molded on the back side of the Spur gear 35.2 such as Combination gear.
  • Page 37 EPSON Stylus COLOR 680/777/77i Revision B Step 2 Step 1 Hopper LD roller LD roller shaft When the paper is loaded (pick up) from When the paper is advanced with Paper return plate the ASF unit, the Change lever moves to...

  • Page 38: Ink System Mechanism

    EPSON Stylus COLOR 680/777/77i Revision B 2.1.6 Ink System Mechanism Table 2-4. PF motor rotational direction & Ink System Mechanism Directions Functions Ink system mechanism consists of pump unit (include the CR lock lever) and capping mechanism. Ink system mechanism drives the pump unit that presses cap to the •...
  • Page 39 EPSON Stylus COLOR 680/777/77i Revision B 2.1.6.2 Capping Mechanism The capping mechanism covers the printheads with the cap holder to prevent the nozzle from increasing viscosity when the printer is in stand-by mode or when the printer is off. This product has valveless cap system. Air valve function used for the previous models pumps and ejects ink only inside the cap by absorbing ink with the valve open.

  • Page 40: Electrical Circuit Operating Principles

    EPSON Stylus COLOR 680/777/77i Revision B 2.2 Electrical Circuit Operating Principles 2.2.1 C383 PSB/PSE board The power supply boards of Stylus COLOR 680/777/777i use a RCC (Ringing Chalk The electric circuit of the Stylus COLOR 680/777/777i consists of the following Converter) circuit, which generates +42VDC for drive line and +5VDC for logic line to boards.
  • Page 41 EPSON Stylus COLOR 680/777/77i Revision B Regardless of the state of the power switch (On or OFF), the voltage is always applied to the primary side of the power supply board from the moment or at the state that AC-plug is plugged in. At this time, F1 plays a role of preventing AC100V from coming into the F1.
  • Page 42 EPSON Stylus COLOR 680/777/77i Revision B +5V line over voltage protection circuit: This protection circuit is in the same line as the +42V over voltage protection circuit is located. The output voltage level of the +5V line is monitored by a Zener diode.

  • Page 43: C383 Main Board

    EPSON Stylus COLOR 680/777/77i Revision B 2.2.2 C383 MAIN Board Use of the 3.3V chips in the logic circuit The 3.3 V regulator (IC11) on the C383MAIN produces 3.3 V by pressuring down The printer mechanism is controlled by C383 MAIN.
  • Page 44 EPSON Stylus COLOR 680/777/77i Revision B 2.2.2.1 Main elements Table 2-7 shows the function of the each main elements on C383 MAIN. Table 2-7. Main Elements Location Function 16bit CPU mounted on the MAIN board is driven by E01A15CA clock frequency 24MHz and controls the printer.
  • Page 45 EPSON Stylus COLOR 680/777/77i Revision B 2.2.2.2 Printhead Driver Circuit The printhead driver circuit consists of the following two components: Common driver IC (IC10:E09A14RA) directly attached to the C383MAIN board. Nozzle selector IC on the head board. The common driver (IC10:E09A14RA) generates a reference drive waveform according to the output signals from the C383MAIN board.
  • Page 46 EPSON Stylus COLOR 680/777/77i Revision B 2.2.2.3 PF Motor (PF/ PUMP/ ASF Motor) Driver Circuit 2.2.2.4 CR Motor Driver Circuit The motor driver IC (IC13) on the MAIN board drives PF motor. This product uses 4- The motor driver IC (IC12) on the MAIN board drives PF motor. This product uses 4-...
  • Page 47 EPSON Stylus COLOR 680/777/77i Revision B 2.2.2.5 Reset Circuit 2.2.2.6 EEPROM Control Circuit Reset circuits consist of the rest IC (IC16). Reset circuits are mounted on the MAIN Since EEPROM is nonvolatile memory, it keeps written information if the printer board to monitor the two voltages: +5V for the logic line and +42V for the drive line.
  • Page 48 EPSON Stylus COLOR 680/777/77i Revision B 2.2.2.7 Sensor Circuit C383 MAIN is equipped with the following two sensors to detect the status of the printer. Unlike the previous product, ASF HP sensor is not equipped on the ASF and the ASF HP is determined with the clutch mechanism (2.1.4 Paper Feeding Mechanism).

  • Page 49: Chapter 3 Troubleshooting

    C H A P T E R TROUBLESHOOTING...

  • Page 50: Overview

    EPSON Stylus COLOR 680/777/777i Revision B 3.1 Overview Table 3-1. Motor, Coil Resistance Motor Location Check Point Resistance This chapter describes how to identify troubles in two levels: unit level repair and component level repair. Refer to the flowchart in this chapter to identify the defective Pin 1 and 3 7.8 Ohms 10%...

  • Page 51: Troubleshooting With Led Error Indications

    EPSON Stylus COLOR 680/777/777i Revision B 3.2 Troubleshooting with LED Error Indications See the following tables which show the error conditions and corresponding possible causes: This section describes how to troubleshoot the problem when the printer indicates an Table 3-4. Error Condition and possible cause error at power on and can not print.
  • Page 52 EPSON Stylus COLOR 680/777/777i Revision B Table 3-4. Error Condition and possible cause (continued) If the problem fits to the detail phenomenon in the table, make sure the check point and repair the product following the corresponding remedy mentioned in the table when...
  • Page 53 EPSON Stylus COLOR 680/777/777i Revision B Table 3-6. Paper out error indication Table 3-7. Paper out error indication Step Step Detail phenomenon Check point Remedy Detail phenomenon Check point Remedy • Check if the clutch • Replace the clutch ASF LD roller dose not 1.
  • Page 54 EPSON Stylus COLOR 680/777/777i Revision B Table 3-8. Paper jam error indication Table 3-9. Paper jam error indication Step Step Detail phenomenon Check point Remedy Detail phenomenon Check point Remedy • Check if the star wheel • Remove the jammed 1.
  • Page 55 EPSON Stylus COLOR 680/777/777i Revision B Table 3-10. Paper jam error indication Table 3-12. Multiple papers are always loaded Step Step Detail phenomenon Check point Remedy Detail phenomenon Check point Remedy When the paper is 1. Check if the CN4 1.
  • Page 56 EPSON Stylus COLOR 680/777/777i Revision B Table 3-14. Fatal Error indication Table 3-15. Fastal Error indication Step Step Detail phenomenon Check point Remedy Detail phenomenon Check point Remedy 1. Check if the Torsion 1. Set the Torsion spring 1. Check if the CR 1.
  • Page 57 EPSON Stylus COLOR 680/777/777i Revision B Table 3-16. Fatal Error indication Table 3-17. Paper is not ejected completely without any error indication Step Step Detail phenomenon Check point Remedy Detail phenomenon Check point Remedy 1. Check if the Top 1. Secure the Housing 1.
  • Page 58 EPSON Stylus COLOR 680/777/777i Revision B Table 3-18. Dot missing occur and it is not recovered with CL Table 3-19. Dot missing occur and it is not recovered with CL Step Step Detail phenomenon Check point Remedy Detail phenomenon Check point Remedy 1.
  • Page 59 EPSON Stylus COLOR 680/777/777i Revision B Table 3-20. Dot missing occur and it is not recovered with CL Table 3-21. Print quality is not good Step Step Detail phenomenon Check point Remedy Detail phenomenon Check point Remedy 1. Check if the segment in 1.
  • Page 60 EPSON Stylus COLOR 680/777/777i Revision B Table 3-22. Print quality is not good Table 3-23. Print quality is not good Step Step Detail phenomenon Check point Remedy Detail phenomenon Check point Remedy 7. Replace the following 1. Check if the suitable 1.

  • Page 61: Chapter 4 Disassembly And Assembly

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

  • Page 62: Overview

    See the precautions given under the handling “WARNING” and “CAUTION” in the This section describes procedures for disassembling the main components of the Stylus following column when disassembling or assembling EPSON Stylus COLOR 680/777/ COLOR 680/777/777i. Unless otherwise specified, disassembly units or components 777i.

  • Page 63: Tools

    EPSON Stylus COLOR 680/777/777i Revision B 4.1.2 Tools Use only specified tools to avoid damaging the printer. Risque d’explosion si la pile est remplacée incorrectment. Ne remplacer que par une pile du même type ou d’un type équivalent Name Supplier Parts No.

  • Page 64: Work Completion Check

    EPSON Stylus COLOR 680/777/777i Revision B 4.1.3 Work Completion Check Table 4-1. Work Completion Check (continued) 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 65: Disassembly

    EPSON Stylus COLOR 680/777/777i Revision B 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. Figure 4-1. Disassembling Flowchart Disassembly and Assembly Disassembly...

  • Page 66: Housing Removal

    EPSON Stylus COLOR 680/777/777i Revision B 4.2.1 Housing removal Remove 2 screws (C.B.S. 3x6 F/Zn) at the back of the printer and remove the Housing. Open the printer cover and remove 2 screws (C.B.S-TITE R 3x6 F/Uc) at the printer front side.

  • Page 67: Operation Panel Removal

    EPSON Stylus COLOR 680/777/777i Revision B 4.2.2 Operation Panel removal When removing the Upper Housing from the left and right Panel, The panel board equipped with printer is as follows: don’t broke these parts since they were fastened slightly with glue.

  • Page 68: Printhead Removal

    EPSON Stylus COLOR 680/777/777i Revision B 4.2.3 Printhead removal Remove 2 screws (C.B.P-TITE 3x8 F/Zn) and detach the Sub Right Panel Housing from the Operation Panel Assembly. Remove the Housing from the printer. (Refer to Section 4.2.1.) C.B.P-TITE 3x8 F/Zn Open the Cover Cartridge and remove the both black and color ink cartridge.
  • Page 69 EPSON Stylus COLOR 680/777/777i Revision B Remove two screws (C.B.P-TITE 3x6 F/Zn and +Bind B-TITE SEMS W2 2.5x5 F/Zn) tighiening the Printhead. C.B.P-TITE 3x6 F/Zn +Bind B-TITE SEMS W2 2.5x5 F/Zn Figure 4-7. Removing the two screws tightening the Printhead Remove the Printhead from the CR unit.
  • Page 70 EPSON Stylus COLOR 680/777/777i Revision B Head installing position pins Head grounding plate Figure 4-9. Printhead installing the position pin & the grounding plate. Tightening Torque for screw • C.B.P-TITE 3x6 screw for printhead: 6+/1kgf.cm When the Printhead is replaced with a new one, following...

  • Page 71: Cr Motor Removal

    EPSON Stylus COLOR 680/777/777i Revision B 4.2.4 CR motor removal Remove the Housing from the printer. (Refer to Section 4.2.1.) Using tweezers or a small screwdriver, slide the CR Lock Lever to front and release the CR Lock Lever from the CR unit. Then move the CR unit to the center area of the CR shaft.
  • Page 72 EPSON Stylus COLOR 680/777/777i Revision B Remove four Hexagon Nuts while holding the CR motor and remove the CR motor assembly. Refer to Figure 4-11. Hexagon nuts Figure 4-11. Removing the CR motor Take the CR motor's cable out from the cable hook in the Waste drain inkpad unit.

  • Page 73: Waste Drain Ink Pad Unit Removal

    EPSON Stylus COLOR 680/777/777i Revision B 4.2.5 Waste drain ink pad unit removal Remove two screws (C.B.P- TITE 3x8 F/Zn) and take some cables off from the cable hook in the Waste drain ink pad unit as shown in the following figure.
  • Page 74 EPSON Stylus COLOR 680/777/777i Revision B After assembling the Waste drain ink pad unit, be sure to set the some cables in the cable hook in the Waste drain ink pad unit. Refer to the Figure 4-13. When assembling the Waste drain ink pad unit, be sure to set the tip of the waste ink tube in the suitable position of the Waste drain ink pad.

  • Page 75: Circuit Board Removal

    EPSON Stylus COLOR 680/777/777i Revision B 4.2.6 Circuit board removal Remove four screws (C.B.S 3x6 F/Zn) securing the Circuit board unit at the back side of the Printer mechanism and remove two screws (C.B.S 3x6 F/Zn) securing Remove the Housing from the printer. (Refer to Section 4.2.1.) the Circuit board unit at the right side (viewed from back side).
  • Page 76 EPSON Stylus COLOR 680/777/777i Revision B Holding the Left housing lightly, pull down the Circuit board unit. Then NOTE: 110V type of the PS board dose not have earth wire. disconnect the following four cables from the corresponding connectors on the Main board.
  • Page 77 EPSON Stylus COLOR 680/777/777i Revision B Since the cable between C383 MAIN board and C383 PSB/E When replacing or removing the PS board, be sure to use the board are directly soldered, take the following steps when following suitable screw to secure the PS board.
  • Page 78 EPSON Stylus COLOR 680/777/777i Revision B Check the Earth terminal and wire position. Refer to the following figure. The earth wire for 120V must be placed back side of the Heat sinker HT1. Be sure to leave at least 2.5 mm of space between heat sink HT1 and thewire.

  • Page 79: Ld Roller Removal

    EPSON Stylus COLOR 680/777/777i Revision B 4.2.7 LD Roller removal Remove two screws (C.B.S 3x6 F/Zn) securing the LD roller holder to the Main frame. Remove the Housing from the printer. (Refer to Section 4.2.1.) Take the Head FFC off from the Head FFC holder located along the LD roller shaft holder.
  • Page 80 EPSON Stylus COLOR 680/777/777i Revision B Push the two hooks of the LD roller shaft holder as shown in the following figure. Remove the LD roller along with the Clutch mechanism from the LD roller shaft holder unit. Pull the LD roller shaft holder unit upward from the Main frame.
  • Page 81 EPSON Stylus COLOR 680/777/777i Revision B Before assembling the LD roller shaft, make sure that the round Do not damage the tooth of the Spur gear 35.2 and the Spur gear hole of the Clutch is set on the protrusion on the LD roller shaft 23.2 when assembling the LD roller shaft holder unit.
  • Page 82 EPSON Stylus COLOR 680/777/777i Revision B 2) Assemble the LD roller shaft holder unit while storing the Paper return plate into the ASF frame. Paper return plate Figure 4-27. LD Roller shaft holder assembling procedure (2) Fasten the LD roller shaft holder with two C.B.S 3x6 F/Zn screws in the order indicated in the following figure.

  • Page 83: Hp/Pe Sensor Removal

    EPSON Stylus COLOR 680/777/777i Revision B 4.2.8 HP/PE Sensor removal Release the two fixing hooks for the sensor from the LD roller shaft holder and remove the sensor. Remove the Housing from the printer. (Refer to Section 4.2.1.) Remove the LD roller from the LD roller shaft holder. (Refer to Section 4.2.7.) Remove HP detection lever from the LD roller shaft holder and disconnect the cable from the sensor connector.
  • Page 84 EPSON Stylus COLOR 680/777/777i Revision B Make sure that the Torsion spring 0.22 is hung to the following Make sure that the HP/PE sensor cable is placed to the suitable suitable position. groove on the LD roller shaft holder. HP/PE sensor cable Torsion spring 0.22...

  • Page 85: Ink System Unit Removal (Cap & Pump Unit )

    EPSON Stylus COLOR 680/777/777i Revision B 4.2.9 Ink system unit removal (Cap & Pump unit ) Release one hook for Cap assembly on the Ink system frame and take the Cap assembly out from the Ink system frame. Remove the Housing from the printer. (Refer to Section 4.2.1.) Disconnect the waste drain ink tube carefully from the bottom of the Cap Remove the Waste drain ink pad from the printer.
  • Page 86 EPSON Stylus COLOR 680/777/777i Revision B Make sure that all gears are set in each gear shaft on the Ink system frame. Tightening torque for screw • C.B.S 3x6 F/Zn screw for Ink system frame & Cap assy.: 9+/1 kgf.cm Combination gear 9.6, 24...

  • Page 87: Paper Eject Roller Removal

    EPSON Stylus COLOR 680/777/777i Revision B 4.2.10 Paper Eject Roller removal .Remove the Plain washer and then remove the Combination gear 11.6, 36.8 carefully. Refer to Figure 4-xx. Remove the Housing from the printer. (Section 4.2.1 Housing removal) Remove three screws (C.B.S 3x6 F/Zn) securing the Front frame to the Main frame.
  • Page 88 EPSON Stylus COLOR 680/777/777i Revision B Open the spur gear 25.6 hook with a pair of tweezers and then slide the paper eject When you replace the Frame front, make sure to lubricate the roller to the right while pulling it toward to remove it.

  • Page 89: Pf Motor Removal

    EPSON Stylus COLOR 680/777/777i Revision B 4.2.11 PF motor removal Remove three nuts (Hexagon Nut M3) securing the PF motor to the left frame. Remove the Housing from the printer. (Refer to Section 4.2.1.) Remove the Waste drain ink pad unit from the printer. (Refer to Section 4.2.6.) Remove the Front frame and Paper eject roller.
  • Page 90 EPSON Stylus COLOR 680/777/777i Revision B Be sure that the PF motor cable is placed to the backward. Refer to the Figure 4-42. PF motor cable Figure 4-42. PF motor cable Since the CN 7 is not located near the rear edge of the Main board, it is easier to use the tweezers or pincers to connect the cable to the CN7.

  • Page 91: Cr Unit Removal

    EPSON Stylus COLOR 680/777/777i Revision B 4.2.12 CR unit removal Remove the Housing from the printer. (Refer to Section 4.2.1.) Remove the CR timing belt from the CR pinion gear. (Refer to Section 4.2.4.) Release the Printhead FFC from the cable holders on the LD roller shaft holder.
  • Page 92 EPSON Stylus COLOR 680/777/777i Revision B Release two CR guide shaft rod springs from the both hooks on the left and right Figure 4-45. Release Right Rod spring for CR shaft sides of the Main frame. Left CR guide shaft rod spring Pull the left edge of the CR guide shaft upward to align it with the round cutout portion.
  • Page 93 EPSON Stylus COLOR 680/777/777i Revision B Unlike the previous products, the oil pad is not built in the CR If the CR unit is disassembled or replaced with a new one, make unit. sure that the CR timing belt is set in the assembling groove correctly as following figure.

  • Page 94: Paper Feed Roller Removal

    EPSON Stylus COLOR 680/777/777i Revision B 4.2.13 Paper feed roller removal Release one hook located on the right edge of the Front paper guide. Remove the Housing from the printer. (Refer to Section 4.2.1.) Remove the Paper Eject roller. (Refer to Section 4.2.10.) Remove the CR unit.
  • Page 95 EPSON Stylus COLOR 680/777/777i Revision B Lift up the left edge of the Front paper guide while slanting the Front paper guide Fit the protrusions of the Left PF roller bushing to the notches in the frames as by pulling up its front edge, and then slide the Front paper guide to the left side shown in the following figure and remove the PF roller fasten spacer with tweezer.
  • Page 96 EPSON Stylus COLOR 680/777/777i Revision B Fit the protrusions of the Right PF roller bushing to the notches in the frames as After assemble the PF roller, make sure that the dowel of the shown in the following figure. both left and right PF roller bushing holder fit in the cut hole of both frames.

  • Page 97: Disassembling Asf Frame Unit

    EPSON Stylus COLOR 680/777/777i Revision B 4.2.14 Disassembling ASF frame unit Remove the Housing from the printer. (Refer to Section 4.2.1.) Spur gear 23.2 Remove the LD roller shaft holder unit (Refer to Section 4.2.7.) Remove two screws (C.B.S.-TITE (P4) 3x8, F/Zn screw, C.B.S-TITE (P4) 3x6 F/ Zn) securing the ASF frame unit and remove the ASF frame unit from the printer mechanism.
  • Page 98 EPSON Stylus COLOR 680/777/777i Revision B Remove the Compression Spring 2.67 located between the ASF Frame and the Remove the Torsion spring 25.7 from the bottom of the ASF frame and the Pad Hopper, and remove the Hopper from the ASF frame.
  • Page 99 EPSON Stylus COLOR 680/777/777i Revision B Remove the Pad holder (Paper return plate) from the ASF frame. When you replace the ASF frame or Hopper with the new one, make sure to lubricate the specific amount of G26 into the groove on ASF frame.

  • Page 100: Chapter 5 Adjustment

    C H A P T E R ADJUSTMENT...

  • Page 101: Overview

    EPSON Stylus COLOR 680/777/777i Revision B 5.1 Overview This section describes the detailed procedures of each adjustment by Adjustment Program. This section describes the procedure for adjustments required when the printer is In this printer, it is necessary to set the adjusting information for each printer disassembled and assembled for repair or service.

  • Page 102: Adjustment Program Feature

    EPSON Stylus COLOR 680/777/777i Revision B 5.1.2 Adjustment Program feature This adjustment program is exclusive for Windows: the OS that allows operation of this program is Windows 98. The following shows programs included in this program. This adjustment program operates only under Windows 98: This program does not operate under DOS or Windows 3.X, 95, NT.

  • Page 103: Adjustment Program Installation Procedure

    EPSON Stylus COLOR 680/777/777i Revision B 5.1.3 Adjustment Program Installation Procedure NOTE: This printer stores model name in the PROM. Therefore, even you select the model name in the screen above, model name will not stored in the This adjustment program is in the 3.5 2HD FD. The first FD is the installer disk. When EEPROM.
  • Page 104 EPSON Stylus COLOR 680/777/777i Revision B This adjustment function enables you to write printhead ID into the specific address of If you replace the failure Main board with a new on, try to perform the “Check the EEPROM. This operation is considered the most important to maintain proper ink head ID”.

  • Page 105: Bi-D Adjustment

    EPSON Stylus COLOR 680/777/777i Revision B Choose the “Input head ID” item in the Head ID menu and click the OK button. When the Head ID is input and write to the EEPROM, the following message is Following Head ID input menu is displayed.
  • Page 106 EPSON Stylus COLOR 680/777/777i Revision B Choose the “Bi-directional” in the “Adjustment main menu” as following figure. Figure 5-9. Choose the Bi-d adjustment Choose the “Print the Bi-d adjustment pattern” in the “Bi-Directional Adjustment pattern” and click the “OK” button.

  • Page 107: Usb Id Input

    USB ports under the Windows 98 environment. A unique code called USB ID is input to the specific address of the EEPROM in our manufactory and the following total 18-digit code is used as a USB ID for the EPSON ink jet printer.
  • Page 108 EPSON Stylus COLOR 680/777/777i Revision B Factory line number (3-digit) Choose the “Input USB ID” and click “OK” button in the “USB ID check/Input” menu. Following menu is displayed. PC number (2-digit) Input year/month/date/time (hour,minutes,sencond) (12-digit) The timer data of the PC is used for this input data.

  • Page 109: Head Cleaning Operation

    EPSON Stylus COLOR 680/777/777i Revision B 5.1.8 Head Cleaning Operation After click the “OK” button, following message is shown in the bottom of the USB ID Check/Input menu In this message, you can check if the USB ID is written in With this sequence, you can forcibly solve the clogged nozzle problem caused by the EEPROM correctly.

  • Page 110: Initial Ink Charge Operation

    EPSON Stylus COLOR 680/777/777i Revision B 5.1.9 Initial Ink Charge Operation NOTE: As described in the menu message, about 1/9 amount of the Black ink cartridge and 1/6 amount of the Color ink cartridge are consumed in the After you replaced any of the following units, perform initial ink charge and return the initial ink charge operation.

  • Page 111: Refurbishment For Doa

    EPSON Stylus COLOR 680/777/777i Revision B 5.1.10 Refurbishment for DOA Click the “EXCHANGE SEQUENCE” in the Transportation Loquid Exchange menu. If you clean the cavity of the printhead and cap assembly, this function will be useful. Exchange sequence 1 After carry out this function, replace the waste drain ink pad Set the dummy I/C filled with S46 liquid into the CR unit and press the “Error...

  • Page 112: Protection Counter Check/Reset

    EPSON Stylus COLOR 680/777/777i Revision B 5.1.11 Protection Counter Check/Reset By clicking the”OK” button, following menu is displayed. The program allows you to check or clear the current protection counter value. (waste ink amount counter) You can confirm or clear the current protection value by main unit alone. Refer to Section 1.4.3.)
  • Page 113 EPSON Stylus COLOR 680/777/777i Revision B If the present counter value is over 24200 points, we recommend you to replace By clicking the “OK” button, the following menu is displayed. the Waste ink drain pad to new one. [ Clear the protection counter value ] Choose the “Clear the protection counter value”...

  • Page 114: Check Pattern Printing

    EPSON Stylus COLOR 680/777/777i Revision B 5.1.12 Check pattern printing After complete the printing, following message is displayed on the bottom column in the menu. This function prints following several kinds of the check pattern on the A4 paper. By printing this A4 pattern, you can check the all adjustment result on the printed result.

  • Page 115: Eeprom Check Function

    EPSON Stylus COLOR 680/777/777i Revision B 5.1.13 EEPROM check function Change EEPROM data You can change the specific data stored in the specific address of the You can check the EEPROM data or can write the specific data into the specific EEPROM.

  • Page 116: Csic Information

    EPSON Stylus COLOR 680/777/777i Revision B 5.1.14 CSIC Information CSIC is an EEPROM mounted on both black and color ink cartridges. Data on the ink's life expectancy and other information is logged within the EEPROM. The ink's life expectancy based on this data is displayed on the print driver's status window.

  • Page 117: Chapter 6 Maintenance

    C H A P T E R MAINTENANCE...

  • Page 118: Overview

    EPSON Stylus COLOR 680/777/777i Revision B 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 119: Service Maintenance

    EPSON Stylus COLOR 680/777/777i Revision B 6.1.2 Service Maintenance 6.1.3 Lubrication If print irregularity (missing dot, white line, etc.) has occurred or the printer indicates The characteristics of the grease have great affects on the mechanical function and “Maintenance Error”, take the following actions to clear the error.
  • Page 120 EPSON Stylus COLOR 680/777/777i Revision B Table 6-2. Lubrication Point Table 6-2. Lubrication Point Lubrication Type/Point Remarks Lubrication Type/Point Remarks • Use a syringe to apply it. <Lubrication Point> • Do not attach the grease to other <Lubrication Point> • After lubrication, move the CR •...
  • Page 121 EPSON Stylus COLOR 680/777/777i Revision B G-55 G-26 Figure 6-1. Lubrication point 1 Figure 6-3. Lubrication point 3 G-26 G-26 G-26 Figure 6-2. Lubrication point 2 Figure 6-4. Lubrication point 4 Maintenance Overview...
  • Page 122 EPSON Stylus COLOR 680/777/777i Revision B 35mm 40mm 40mm 35mm G-26 Figure 6-5. Lubrication point 5 G-26 Figure 6-6. Lubrication point 6 Maintenance Overview...

  • Page 123: Chapter 7 Appendix

    C H A P T E R APPENDIX...

  • Page 124: Connector Summary

    EPSON Stylus COLOR 680/777/777i Revision B 7.1 Connector Summary Table 7-1. Connector Summary for C383MAIN/MAIN-B 7.1.1 Major Component Unit Connector Function Table to refer to Refer to The Major component units of this printer are as follows. For connection with the parallel interface “IEEE1284.4...
  • Page 125 EPSON Stylus COLOR 680/777/777i Revision B Table 7-4. CN8 - Printhead Table 7-5. CN9 - Printhead Signal Name Function Signal Name Function Print data output (6) Head drive pulse (trapezoid waveform) Print data output (5) Ground Print data output (4)
  • Page 126 EPSON Stylus COLOR 680/777/777i Revision B Table 7-8. CN12 - CR Motor Table 7-6. CN10 - Power Supply Board Signal Name Function Signal Name Function Phase drive signal (A) +42V Mechanism drive power supply Phase drive signal (-A) +42V Mechanism drive power supply...

  • Page 127: Eeprom Address Map

    EPSON Stylus COLOR 680/777/777i Revision B 7.1.2 EEPROM Address Map Table 7-9. EEPROM Address Map (continued) QPIT Factory Address Explanation Setting Table 7-9. EEPROM Address Map setting setting QPIT Factory Ink counter Clm 000H Address Explanation Setting setting setting Ink flag1...
  • Page 128 EPSON Stylus COLOR 680/777/777i Revision B Table 7-9. EEPROM Address Map (continued) QPIT Factory Address Explanation Setting setting setting CL time CPU Time 00H*2 00H*2 accumulated printing time D4mode I/F Bit7: I/F Control Flag Bit6: Bit5: Reserved Bit4: Bit3: D4mode USB...
  • Page 129 EPSON Stylus COLOR 680/777/777i Revision B QPIT Factory QPIT Factory Address Explanation Setting Address Explanation Setting setting setting setting setting 1stDot Position 00H (*1) Interface selection Bit7: Reserved 00H*2 -72<=n<=+72 (by 1/2880inch) Adjustment (*1) Bit6: Reserved CL2 Counter KK Bit5: Reserved...
  • Page 130 EPSON Stylus COLOR 680/777/777i Revision B QPIT Factory QPIT Factory Address Explanation Setting Address Explanation Setting setting setting setting setting Printer For CSIC 8:R4C62 Head Actuator Rank +30<=n<=+70 00H (*1) ID for IwLM 9:R4C64 USB ID (*1) (*1) CSIC1_InkName1; Market ID...

  • Page 131: Component Layout

    EPSON Stylus COLOR 680/777/777i Revision B 7.2 Component Layout Figure 7-2. C383MAIN Component Layout (Parts Side) Figure 7-3. C383 MAIN B Component Layout Appendix Component Layout...
  • Page 132 EPSON Stylus COLOR 680/777/777i Revision B Figure 7-5. C383PSE Component Layout Figure 7-4. C383PSB Component Layoout Appendix Component Layout...

  • Page 133: Exploded Diagram

    EPSON Stylus COLOR 680/777/777i Revision B 7.3 Exploded Diagram Following pages show exploded diagram. forEURO,EAI(220V),ASIA(220V),EAL,RUSSIA For 120V(EAI,EUL,ESP,ETT) EPSON STYLUS COLOR 680 No.1 Rev.01 10243 Figure 7-6. Stylus Color 680 Exploded Diagram 1 Appendix Exploded Diagram...
  • Page 134 EPSON Stylus COLOR 680/777/777i Revision B forEURO,EAI(220V),ASIA(220V),EAL,RUSSIA For 120V(EAI,EUL,ESP,ETT) EPSON STYLUS COLOR 777 10243 No.1 Rev.01 Figure 7-7. Stylus Color 777 777i Exploded Diagram 1 Appendix Exploded Diagram...
  • Page 135 EPSON Stylus COLOR 680/777/777i Revision B EPSON STYLUS COLOR 777/680 No.2 10243 Rev.01 Figure 7-8. Stylus Color 680/777/777i Exploded Diagram 2 Appendix Exploded Diagram...
  • Page 136 EPSON Stylus COLOR 680/777/777i Revision B 544 545 EPSON STYLUS COLOR 777/680 No.3 Rev.01 10243 Figure 7-9. Stylus Color 680/777/777i Exploded Diagran 3s Appendix Exploded Diagram...
  • Page 137 EPSON Stylus COLOR 680/777/777i Revision B 556 x 3 EPSON STYLUS COLOR 777/680 10243 No.4 Rev.01 Figure 7-10. Style Clor 680/777/777i Exploded Diagram 4 Appendix Exploded Diagram...

  • Page 138: Parts List

    EPSON Stylus COLOR 680/777/777i Revision B 7.4 Parts List Table 7-10. Stylus COLOR 680/777/777i Parts List Code Parts Name CONNECTOR Table 7-10. Stylus COLOR 680/777/777i Parts List CONNECTOR Code Parts Name CONNECTOR HOUSING CONNECTOR COVER,PRINTER CONNECTOR 57RE-40360-830B(D7B) PAPERSUPPORT CERAMIC CRYSTAL...
  • Page 139 EPSON Stylus COLOR 680/777/777i Revision B Table 7-10. Stylus COLOR 680/777/777i Parts List Table 7-10. Stylus COLOR 680/777/777i Parts List Code Parts Name Code Parts Name C.B.SCREW,2.6X6,F/ZN SPACER,C-RING TRANSISTOR ROLLER,PF C.B.SCREW,2.6X6,F/ZN BUSHING,ROLLER,PF TRANSISTOR BUSHING,ROLLER,PF,LEFT BOARD ASSY.,POWER SUPPLY SPACER,FASTEN,ROLLER,PF FRAME,MAIN GROUNDING WIRE,ROLLER,PF...
  • Page 140 EPSON Stylus COLOR 680/777/777i Revision B Table 7-10. Stylus COLOR 680/777/777i Parts List Table 7-10. Stylus COLOR 680/777/777i Parts List Code Parts Name Code Parts Name ROD SPRING,STAR WHEEL COMBINATION GEAR,11.2,32.4 C.C.S.SCREW COMBINATION GEAR,22.4,32 PAPERGUIDE,LEFT CABLE,HEAD;B SPACER,COVER CARTRIDGE COMPRESSION SPRING,4.80 PRINT HEAD TORSIONSPRING,25.7...

  • Page 141: Electrical Circuits

    EPSON Stylus COLOR 680/777/777i Revision B 7.5 Electrical Circuits The electric circuit diagrams below are shown at the following pages: C383MAIN control circuit board C383MAIN-B control circuit board C383PSB power supply circuit board C380PSE power supply circuit board Appendix Electrical Circuits...

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