Epson Stylus Color 400 Service Manual
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Epson Stylus Color 400 Service Manual

Color ink-jet printer
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EPSON
COLOR INK-JET PRINTER

EPSON Stylus Color 400

SERVICE MANUAL

SEIKO EPSON CORPORATION
4007366

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Summary of Contents for Epson Stylus Color 400

  • Page 1: Epson Stylus Color

    EPSON COLOR INK-JET PRINTER EPSON Stylus Color 400 SERVICE MANUAL SEIKO EPSON CORPORATION 4007366...
  • Page 2 However, should any errors be detected, SEIKO EPSON would greatly appreciate being informed of them. The above notwithstanding SEIKO EPSON can assume no responsibility for any errors in this manual or the consequences thereof. EPSON is a registered trademark of SEIKO EPSON CORPORATION.
  • Page 3 POWER SUPPLY CABLE MUST BE CONNECTED, USE EXTREME CAUTION IN WORKING ON POWER SUPPLY AND OTHER ELECTRONIC COMPONENTS. CAUTION 1. REPAIRS ON EPSON PRODUCT SHOULD BE PERFORMED ONLY BY EPSON CERTIFIED REPAIR TECHNICIAN. 2. MAKE CERTAIN THAT THE SOURCE VOLTAGE IS THE SAME AS THE RATED VOLTAGE, LISTED ON THE SERIAL NUMBER/RATING PLATE.
  • Page 4 PREFACE This manual describes functions, theory of electrical and mechanical operations, maintenance, and repair of EPSON Stylus Color 400. The instructions and procedures included herein are intended for the experience repair technician, and attention should be given to die precautions on the preceding page. The Chapters are organized as follows: CHAPTER 1.
  • Page 5 REVISION SHEET Revision Issued Data Contents Rev. A February18. 1997 First issue...
  • Page 6 TABLE OF CONTENTS CHAPTER 1. GENERAL DESCRIPTION CHAPTER 2. OPERATING PRINCIPLES CHAPTER 3. DISASSEMBLY AND ASSEMBLY CHAPTER 4. ADJUSTMENT CHAPTER 5. TROUBLESHOOTING CHAPTER 6. MAINTENANCE APPENDIX...

  • Page 7: Table Of Contents

    Chapter 1 Product Descriptions 1.1 Features.........................1-1 1.2 Specifications .......................1-2 1.2.1 Printing Specification......................1-2 1.2.2 Paper Specification ........................ 1-4 1.2.2.1 Cut Sheet........................1-4 1.2.2.2 Transparency, Glossy Paper ..................1-4 1.2.2.3 Envelope........................1-4 1.2.2.4 Index Card......................... 1-4 1.2.3 Adjust Lever Settings (PG adjust lever) ................1-5 1.2.4 Printing Area ...........................

  • Page 8: Features

    EPSON Stylus Color 400 Service Manual 1.1 Features Stylus Color 400 is designed for PC users at home and low price for that high performance. Also, this printer has the same high color print quality(720X720dpi) as Stylus ProXL. The major printer features are;...

  • Page 9: Specifications

    Chapter1 Product Description 1.2 Specifications This section describes each specification for Stylus Color 400; 1) Printing specification, 2) Paper specification, 3) Adjust lever settings, 4) Printing area, 5) Environmental condition, 6) Ink Cartridge specification, 7) Physical specification, 8) Electric specification, 9) Reliability. 1.2.1 Printing Specification Print method On demand ink jet (MACH type.
  • Page 10 EPSON Stylus Color 400 Service Manual Feeding method Friction feed with ASF Paper feed resolution 0.035mm(1/720 inch) Line spacing 1/6 inch or programmable at 1/360 inch Paper path Cut-sheet ASF(Top entry) Feeding speed 66.6ms (1/6 inch) 153.7ms (9.03mm line spacing) 76.2ms (continues 3.0 inch/sec)

  • Page 11: Paper Specification

    Chapter1 Product Description 1.2.2 Paper Specification This section describes the printable area and types of paper that can be used in this printer. 1.2.2.1 Cut Sheet [Size] : A4 [Width 210mm(8.3”) x Length 297mm(11.7”)] : Letter [Width 216mm(8.5”) x Length 279mm(11.0”)] : B5 [Width 182mm(7.2”) x Length 257mm(10.1”)] : Legal [Width 216mm(8.5”) x Length 356mm(14.0”)] : Statement [Width 139.7mm(5.5”) x Length 215.9mm(8.5”)]...

  • Page 12: Adjust Lever Settings (Pg Adjust Lever)

    EPSON Stylus Color 400 Service Manual 1.2.3 Adjust Lever Settings (PG adjust lever) The adjust lever located on the right side(blue) under the printer cover needs to be set to the proper position according to the paper you print. (Refer to the table below). Also, if there is any dirt caused by friction on the wavy or wrinkled paper, this can be prevented by changing the lever position to rear position (marked with “+”) in spite of paper types.

  • Page 13: Printing Area

    Chapter1 Product Description 1.2.4 Printing Area [Cut Sheet] Following tables show printable areas at Character mode and Raster Graphics mode. Table 1-4. Character Table Paper size PW(Paper PL(Paper LM(Left RM(Right TM(Top BM(Bottom width) Length) margin) margin) margin) margin) (typ) (typ.) (min.) (min.) (min.)
  • Page 14 EPSON Stylus Color 400 Service Manual [Envelope] The table and figure below show the printable area for envelopes. Table 1-6. Printable Area for Envelope Paper size LM(Left margin) RM(Right margin) TM(Top margin) BM(Bottom (min.) (min.) (min.) margin) (min.) 3mm(0.12”) 28mm(1.10”) 3mm(0.12”)

  • Page 15: Environmental Condition

    Chapter1 Product Description 1.2.5 Environmental Condition Temperature Operating :10 to 35 C (Refer to the figure below for condition) Non-operating : -20 to 60 C(with shipment container) Note) 1 month at 40 C and 120 hours at 60 C Humidity Operating : 20% 80% RH (without condensation.

  • Page 16: Ink Cartridge Specifications

    EPSON Stylus Color 400 Service Manual 1.2.6 Ink Cartridge Specifications [Black Ink Cartridge] Table 1-7.Black Cartridge Specification Item Specifications Type Exclusive cartridge Color Black Print capacity 540 pages / A4 (ISO/IE10561 Letter Pattern at 360 dpi) Validity 2 years (sealed in package) / 6months(out of package)
  • Page 17 Chapter1 Product Description [Color Ink Cartridge] Table 1-8. Color Ink Cartridge Specification Item Specifications Type Exclusive cartridge Color Magenta, Cyan, Yellow Print capacity 320 pages / A4 (360 dpi, 5% duty each color) Validity 2 years (sealed in package) / 6months(out of package) Environmental Temperature conditions...

  • Page 18: Physical Specification

    EPSON Stylus Color 400 Service Manual 1.2.7 Physical Specification [Dimension] : 429mm(W) x 234mm(D) x 162mm(H) : 429mm(W) x 695mm(D) x 309mm(H) with extended stacker and paper support. [Weight] : 5.2Kg 1.2.8 Input Data Buffer 10 K byte 1-11 Rev. A...

  • Page 19: Electric Specification

    Chapter1 Product Description 1.2.9 Electric Specification [120V version] [Rated voltage] : AC120V [Input voltage range] : AC103.5 132V [Rated frequency range] : 50 60Hz [Input frequency range] : 49.5 60.5Hz [Rated current] : 0.4A(Max. 0.5A) [Power consumption] : Approx.15W(ISO/IEC 10561 Letter pattern) : Energy Star compliant [Insulation Resistance] : 10M ohms min.(between AC line and chassis, DC500V)

  • Page 20: Acoustic Noise

    EPSON Stylus Color 400 Service Manual 1.2.12 Acoustic Noise [Level] : Approx.45 dB(A) (According to ISO 7779) 1.2.13 CE Marking [220-240V version] Low voltage Directive 73/23/EEC :EN60950 EMC Directive 89/336/EEC :EN55022 Class B EN61000-3-2 EN61000-3-3 EN50082-1 IEC801-2 IEC801-3 IEC801-4 1.2.14 Printer Language and Emulation...
  • Page 21 Chapter1 Product Description Color Printing color : ESC r, ESC(r EEPROM control EEPROM control : ESC 1-14 Rev. A...

  • Page 22: Interface

    EPSON Stylus Color 400 Service Manual 1.3 Interface This printer provides parallel interface as standard. 1.3.1 Parallel Interface (Forward Channel) [Transmission mode] : 8 bit parallel, IEEE-1284 compatibility mode [Synchronization] : By /STOPBE pulse [Handshaking] : BY BUSY and /ACKLG signal...

  • Page 23: Parallel Interface (Reverse Channel)

    :Request Nibble Mode Reverse Channel Transfer. :Request device ID; Return Data using Nibble Mode Rev Channel Transfer. Note) The printer sends following device ID string when it is requested. Table 1-10. Device ID Description Contents EPSON Production Maker ESCPL2,BDC Command system Stylus[SP]Color[SP] 400 Model name...
  • Page 24 EPSON Stylus Color 400 Service Manual Following lists “Notes” when using Parallel Interface. Note1) “ Return GND pin” in the table means twist pair return and is used for all control signals except for Logic H,+5V, Chassis, GND and NC. In this twist pair return, returning side is connected to GND (16,33, 19-30 pin) for twist pair return.

  • Page 25: Prevention Hosts From Data Transfer Time-Out

    Chapter1 Product Description [Signal level: TTL compatible (IEEE-1284 level 1 device)] Table 1-14. Signal Level Parameter Minimum Maximum Condition VOH* 5.5V VOL* -0.5V IOH* 0.32mA VOH = 2.4V 12mA VOL = 0.4V 50pF 2.0V 0.8V 0.32mA VIH = 2.0V 12mA VIL = 0.8V 50pF *A low logic level on the Logic H signal is 2.0V or less when the printer is powered off and this...

  • Page 26: Control Panel

    EPSON Stylus Color 400 Service Manual 1.4 Control Panel Since Stylus Color 400 does not require many buttons since printer driver can start various settings and motions. Therefore, there are only 2 non-lock type push switches, 1 lock type push switch and 4 LEDs.

  • Page 27: Panel Functions

    Chapter1 Product Description 1.4.2 Panel Functions Panel Functions Table 1-15. Panel Function Switch Function Load/Eject Loads or Eject the paper. (Pushing within 2 seconds*) When carriage is on the Ink Cartridge change position, return carriage from Ink Cartridge change position. Load/Eject Starts the Ink Cartridge change sequence.** (Pushing for 2 seconds*)
  • Page 28 EPSON Stylus Color 400 Service Manual [Maintenance Error Reset Procedure] You can reset the maintenance error by pressing the cleaning switch after you enter the particular setting mode(Refer to table 1-15.) There are no function which can be reset the all address in EEPROM on the Stylus Color 400.

  • Page 29: Printer Condition And Panel Status

    Chapter1 Product Description 1.4.3 Printer Condition and Panel Status The table below shows printer condition and panel status. Since this table shows various error status and also present printer status, you can judge appropriate repair ways from this table. Table 1-18. Printer Condition and Panel Status Indicators Printer status Power...

  • Page 30: Error Status

    EPSON Stylus Color 400 Service Manual 1.5 Error Status When following status occur, the printer goes to the error status and stops taking data, setting the /ERROR signal in the interface as “Low”, and Busy signal as “High”. At this time, the printer goes to non printable status.

  • Page 31: No Ink-Cartridge

    Chapter1 Product Description 1.5.4 No Ink-Cartridge Following reasons can be the causes when printer goes this error mode. When the printer is turned on for the first time. (This is a normal error state and it returns to the normal state after installing an ink cartridge according to the ink cartridge exchange operation.) 2) Ink cartridge exchange operation is done correctly.

  • Page 32: Printer Initialization

    EPSON Stylus Color 400 Service Manual 1.6 Printer Initialization Stylus Color 400 has three kinds of initialization methods. Following explains each initialization. [1.Power-on initialization] This printer is initialized when turning the printer power on, or printer recognized the cold-reset command (remote RS command).

  • Page 33: Main Components

    5) C206 PNL(Panel Board) 1.8.1 Printer Mechanism Unlike EPSON’s previous ink jet printer mechanisms, one of the major characteristics of Stylus Color 400 is that the printer has no Engage/Dis-Engage mechanism in order to change over pump mechanism and paper feeding mechanism. In stead, however, this change-over control is done by the distinction between turning direction of PF/Pump motor and position of present carriage unit.

  • Page 34: C206 Psb/Pse Power Supply Board

    EPSON Stylus Color 400 Service Manual 1.8.3 C206 PSB/PSE Power Supply Board In the electric boards for Stylus Color 400, switching regulator method is used and supplies stable logic and power voltages constantly. Also, since this C206PSB board has secondly type switch for its circuit system, it is possible to keep supplying electricity to the C206 main control board for 30 seconds even after the power switch is turned off.
  • Page 35 Chapter 2 Operating Principles 2.1 OVERVIEW .......................1 2.1.1 Printer Mechanism ........................1 2.1.1.1 Printing Mechanism ...................... 2 2.1.1.1.1 Printing Process ....................3 2.1.1.1.2 Printing Method ....................4 2.1.1.2 Carriage Mechanism ....................7 2.1.1.2.1 Paper Gap Adjust Mechanism ................ 10 2.1.1.3 Paper Feed Mechanism and Pump Mechanism ............11 2.1.1.4 Ink System........................

  • Page 36: Overview

    Stylus Color 400. 2.1.1 Printer Mechanism Unlike previous EPSON Ink Jet printers, printer mechanism of Stylus Color 400 does not have exclusive mechanism to change over paper feeding and Pumping operation. In stead, this control is done by the turning direction of paper feed/pump motor and position of carriage at that time.

  • Page 37: Printing Mechanism

    EPSON Stylus Color 400 Service Manual As major printer mechanisms in the figure 2-1, there are four major mechanisms as they are listed below. 1) Printing mechanism 2) Carriage unit 3) Paper pick up mechanism 4) Pump drive mechanism 2.1.1.1 Printing Mechanism Basic principles of the print head which plays major role of printing mechanism is the same as previous models;...

  • Page 38: Printing Process

    Chapter2 Operating Principles 2.1.1.1.1 Printing Process Following figures indicate the sectional drawing of normal state and ejecting state of the print head. (1) Normal State: When the print signal is not output, PTZ also does not move in the waiting state(normal state). Figure 2-3.

  • Page 39: Printing Method

    EPSON Stylus Color 400 Service Manual 2.1.1.1.2 Printing Method This section explains printing method of actual printing such as printing text at various resolution select/printing mode and graphics printing. In order to prevent white or color banding which are peculiar problem of ink-jet, new Micro-Weave functions are added to the previous Micro-Weave function.
  • Page 40 Chapter2 Operating Principles Note2) Two groups which are divided according to each elements will be divided either even dot or odd dot when particular lines(level direction line) are formed and eventually, these lines will be completed at selected resolution. Following is a conceptual figure when full overlap micro- weave orms a particular line.
  • Page 41 EPSON Stylus Color 400 Service Manual The difference between Full-Overlap Micro-Weave and Part line Overlap Micro-Weave are following; Full-Overlap Micro-Weave: Printing is performed, judging if nozzles are even or odd dot by 2 different dots with all different rasters. Part line Overlap Micro-Weave: After particular nozzles(only#1, and #6 in the figure2-7) are determined as overlap nozzles, even or odd dot will be determined like Full-overlap Micro-Weave does.

  • Page 42: Carriage Mechanism

    Chapter2 Operating Principles 2.1.1.2 Carriage Mechanism Carriage mechanism is to drive the carriage with print head mounted from left to right or vice versa. The carriage drive motor in this printer is a 4-phase, 200-pole, stepping motor and is driven by 1-2phase, 2-2phase and W1-2phase drive method.
  • Page 43 EPSON Stylus Color 400 Service Manual The table below shows W1-2 phase drive sequence at each steps when the rotor of carriage motor makes one rotation. In the Stylus Color 400, in addition to a function that printing is performed with W1-2 drive phase, high speed skip mode which is a function to skip over the blank from the end of the printing data to the next data starting point with high seed can be also performed by 2-2 and 1-2 phase drive.
  • Page 44 Chapter2 Operating Principles The figure below shows the carriage mechanism. The print head as a core of the printing mechanism is stored in the carriage unit. This print head keeps the tilt of print head in flexible and adjustable structure by moving the adjustment lever up and down by the tilt adjustment mechanism.

  • Page 45: Paper Gap Adjust Mechanism

    EPSON Stylus Color 400 Service Manual 2.1.1.2.1 Paper Gap Adjust Mechanism This mechanism can be set by the users and can prevent various problems related to low image density or print with any dirt by changing the positions of PG lever according to the paper types.

  • Page 46: Paper Feed Mechanism And Pump Mechanism

    Chapter2 Operating Principles 2.1.1.3 Paper Feed Mechanism and Pump Mechanism Mechanisms that send the paper in the hopper to inside the printer and perform constant paper feed in order to perform printing on the sent paper are called paper feed mechanism as generic name. In the Stylus Color 400, 4-phase, 200-pole hybrid type pulse motor is used in the PF motor as a motive power of the paper mechanism and driving is done at 2-2 and 1-2 phase drive method.
  • Page 47 EPSON Stylus Color 400 Service Manual Papers on the ASF (auto-sheet-feeder) supplied by the user are carried to the printer inside by paper pick up sequence. Unlike the previous models, ASF of Stylus Color 400 has mufti feed prevention mechanism. Following explains this function and figure below shows its mechanism.
  • Page 48 Chapter2 Operating Principles In the paper pick up mechanism of Stylus Color 400, same mechanism as Stylus Color IIs/820 are applied. This mechanism changes adjoined lines of gear by colliding trigger lever with carriage unit and convey the motive power on the platen to the ASF side(paper roller). The figure below shows mechanism with explanation.

  • Page 49: Ink System

    EPSON Stylus Color 400 Service Manual 2.1.1.4 Ink System Ink system mechanism consists of 1)cap mechanism, 2)pump mechanism, 3)carriage lock mechanism, 4)waste ink absorber and 5)ink sequence. Out of these mechanism, from 1) to 4) are physical mechanism and parts which are mounted on the printer mechanism and 5) ink sequence is performed automatically by firmware.

  • Page 50: Pump Mechanism

    Chapter2 Operating Principles 2.1.1.4.1 Pump Mechanism In the Stylus Color 400, there is no switch or mechanism to change over the pump/paper feed mechanism. Therefore, whenever the paper feed/pump motor rotate, pump drive roller in the pump unit inside rotates. However, ink absorption/non ink absorption are separated by the roller rotational direction. Also, even if the pump driver rotates toward ink absorption and the carriage position is in the false absorption position, only driving in the pump mechanism is performed and actual ink attraction is not done.
  • Page 51 EPSON Stylus Color 400 Service Manual The table below shows PF/Pump motor rotational direction and pump system operation. Table 2-11. Relationship Between Pump Motor Rotation and Pump Operation PF/Pump motor rotational direction Pump unit operation Clockwise(CW) 1)Release from the Pump pressure welding...

  • Page 52: Cap Mechanism

    Chapter2 Operating Principles 2.1.1.4.2 Cap Mechanism In the cap mechanism, in order to prevent ink from being thickened on the head surface, it is controlled that the head surface stays adherent to the rubber frame of the cap surface when the power is off. The absorber is spread in the cap and can hold a certain amount of ink which is absorbed from the head without draining it to the waste ink pad.

  • Page 53: Electrical Circuit Operating Principles

    EPSON Stylus Color 400 Service Manual 2.2 Electrical Circuit Operating Principles Stylus Color 400 contains the following four electric circuit boards. C206 PSB/PSE board C206 Main board Head Driver board C206 PNL board C206 PSB/PSE, C206 board are explained in this section. The head drive board is installed in the head unit on the carriage.

  • Page 54: C206 Psb/Pse Power Supply Board

    Chapter2 Operating Principles 2.2.1 C206 PSB/PSE Power Supply Board C206 PSB/PSE board is a power supply board with a RCC switching regulator, which generates +42VDC for drive part and +5VDC for logic part to drive the printer. One of the major characteristic of this board is that the same secondary switch is used as Stylus Color series printer.
  • Page 55 EPSON Stylus Color 400 Service Manual Figure 2-18. C206 PSB/PSE Board Block Diagram The C206 PSB/PSE board has various control circuits to stop output if malfunction on the power supply board, on the main board or on the duty of printer mechanism happen. Following explains each control and protection circuits.

  • Page 56: C206 Main Board

    Chapter2 Operating Principles 2.2.2 C206 MAIN Board Various DC voltage generated on the C206 PSB/PSE board is added various signals in order to drive the printer function on the C206 main board, and the drive of CR/PF(Pump) motor and printing head is performed.
  • Page 57 EPSON Stylus Color 400 Service Manual Timer Data: The timer IC that uses lithium battery as power source monitors how long the power is off. When the power is turned on, it is changed to appropriate cleaning level according to the time that the power is off.

  • Page 58: Reset Circuits

    Chapter2 Operating Principles 2.2.2.1 Reset Circuits The reset circuit prevents the CPU from running away, which is caused by the unstable voltage in the logic line during the power ON/OFF operation. Also, this circuit monitors level of power voltage at the over loading or malfunction on the circuit and manages the printer to operate normally, keeping the damage to the printer minimum during the abnormal situations.

  • Page 59: Sensor Circuits

    EPSON Stylus Color 400 Service Manual 2.2.2.2 Sensor Circuits The following sensor circuits are mounted in the Stylus Color 400 and selects appropriate operations based on the returned information. ASF Sensor: An ASF sensor detects the position of return lever when the power is...

  • Page 60: Eeprom Control Circuits

    Chapter2 Operating Principles 2.2.2.3 EEPROM Control Circuits The EEPROM of Stylus Color 400 has following contents. Gate array E05B44(IC2) controls operations of reading data when the power is on and writing data when the power is off. Ink consumption(Bk, CMY) CL counter(Various cleaning operations that are previously done are memorized) Destination information Information of various adjustment values(Bi-D, VH voltage, etc.)

  • Page 61: Timer Circuit

    EPSON Stylus Color 400 Service Manual 2.2.2.4 Timer Circuit The lithium battery is mounted on the C206 main board and calculates how long the printer is not used. The timer IC(IC5) starts counting with oscillation motivated by the CR1 using this battery as a power source.

  • Page 62: Print Head Control Circuit

    Chapter2 Operating Principles 2.2.2.6 Print Head Control Circuit The print head control circuit of Stylus Color 400 has following characteristics. Common wave form circuit became one HIC. Slight vibration mode is added.(when the CR motor is accelerating) High speed drive 14.4Khz (trapezoidal wave form Big Nozzle configuration (resolution in the vertical direction)90dpi (However, black nozzle is 2 lines structure) Also, Stylus Color 400 does not have Micro-dot control as dot shooting control, but there are two types;...
  • Page 63 EPSON Stylus Color 400 Service Manual [Nozzle Selector Drive Circuit] In order to motivate the print head to carry out printing, it is necessary to transmit the printing data to the appropriate nozzles, which becomes direct signals to drive PZT. This data transmission is performed by the serial method, however the data output for each black and CMY head is transmitted by the parallel method.
  • Page 64 Chapter2 Operating Principles After the data transmission by the nozzle selector(IR2C72C) is completed and a certain time passes, trapezoidal wave form generated by the common drive circuit once sends electric current to the PZT for the proper nozzles which are determined in the nozzle selector circuit. This motivates PZT and ejects the ink in the cavity.

  • Page 65: Pf (Pump) Motor Drive Circuit

    EPSON Stylus Color 400 Service Manual 2.2.2.7 PF (Pump) Motor Drive Circuit IC15(LB1845) is used for driving PF(Pump) motor. In the IC, Bi-pola drive PWM current control type is performed, making it possible to provide stable current to each phase of motor.

  • Page 66: Cr Motor Drive Circuit

    Chapter2 Operating Principles 2.2.2.8 CR Motor Drive Circuit In the CR motor, the same LB1845(IC15) as the PF motor has is used. In the IC, Bi-pola drive PWM current control type is performed, making it possible to provide stable current to each phase of motor. Also, it makes possible to change over the reference voltage as drive current settings by making 3 combinations(100%, 66% and 33%), using 4 current setting ports(input).
  • Page 67 Chapter 3 Disassembly and Assembly 3.1 OVERVIEW ......................3-1 3.1.1 Precautions for Disassembling the Printer................3-1 3.1.2 Tools ............................3-2 3.1.3 Specification for Screws......................3-2 3.1.4 Service Checks After Repair....................3-3 3.2 Disassembly Procedures ..................3-4 3.2.1 Removing the Housing ......................3-5 3.2.2 Removing the Board Assembly.....................

  • Page 68: Overview

    Chapter3 Disassembly and Assembly 3.1 OVERVIEW This section describes procedures for disassembling the main components of EPSON Stylus Color 400. Unless otherwise specified, disassembly units or components ca be reassembled by reversing the disassembly procedure. Therefore, no assembly procedures are included in this section. Precautions for any disassembly or assembly procedure are described under the heading “WORK POINT”.

  • Page 69: Tools

    EPSON Stylus Color 400 Service Manual CAUTION When assembling, if ink cartridge is removed and needs to be installed again, make sure to install new ink cartridge because of following reasons; Once the ink cartridge mounted on the printer is removed, air comes into and becomes bubbles in the cartridge.

  • Page 70: Service Checks After Repair

    Chapter3 Disassembly and Assembly 3.1.4 Service Checks After Repair Before returning the printer after service, use the check list in Table 3-3, which provides a record to make servicing and shipping more efficient. Table 3-3. Inspection Check List for the Repaired Printer Category Component Item to check...

  • Page 71: Disassembly Procedures

    EPSON Stylus Color 400 Service Manual 3.2 Disassembly Procedures The figure below shows procedures for disassembly. Figure 3-1. Flow Chart of Disassembly Rev. A...

  • Page 72: Removing The Housing

    Chapter3 Disassembly and Assembly 3.2.1 Removing the Housing Since the printer mechanism itself structures the bottom part, the printer mechanism appears just by removing the housing. 1. Open the printer cover and turn the PG adjustment lever towards (+) side. 2.

  • Page 73: Removing The Board Assembly

    EPSON Stylus Color 400 Service Manual 3.2.2 Removing the Board Assembly Since the main board(C206 Main) and power supply circuit board(C206 PSB) are built in different bracket from the printer mechanism, remove the whole bracket from the printer mechanism. 1. Remove the housing.(Refer to 3.2.2) 2.
  • Page 74 Chapter3 Disassembly and Assembly Figure 3-4. Removing the Boards Rev. A...

  • Page 75: Removing The Operation Panel

    EPSON Stylus Color 400 Service Manual 3.2.3 Removing the Operation Panel 1. Remove the housing. (Refer to 3.2.1) 2. Remove two screws (No.1) securing the operation panel and disconnect the operation panel from the printer mechanism. 3. Remove one screw (No.1) and detach the left panel housing.

  • Page 76: Disassembling The Printer Mechanism

    Chapter3 Disassembly and Assembly 3.2.4 Disassembling the Printer Mechanism Since Stylus Color 400 does not have the lower housing, the printer mechanism part should be already appeared by now. Therefore, this section explains procedures for disassembling the major parts or units of printer mechanism.
  • Page 77 EPSON Stylus Color 400 Service Manual Figure 3-6.Removing the Print Head Figure3-7.Installing the Print Head 3-10 Rev. A...

  • Page 78: Removing The Absorber Tray Assembly ;A

    Chapter3 Disassembly and Assembly 3.2.4.2 Removing the Absorber Tray Assembly ;A 1. Remove the housing. (Refer to 3.2.1) 2. Remove the operation panel. (Refer to 3.2.3) 3. Remove one screw (No.4) securing “Absorber tray assembly” located on the right side of the printer mechanism.

  • Page 79: Removing The Pump Assembly And Cap Assembly

    EPSON Stylus Color 400 Service Manual 3.2.4.3 Removing the Pump Assembly and Cap Assembly 1. Remove the housing .(Refer to 3.2.1) 2. Remove the operation panel. (Refer to 3.2.3) 3. Remove the absorber tray assembly ;A. (Refer to 3.2.4.2) 4. Loose two screws located on the edges of the paper eject frame assembly and float the paper eject assembly.
  • Page 80 Chapter3 Disassembly and Assembly Figure 3-9. Removing the Cap and Pump Assemblies Figure 3-10. Component of Pump Assembly 3-13 Rev. A...

  • Page 81: Removing The Cr Motor Assembly

    EPSON Stylus Color 400 Service Manual 3.2.4.4 Removing the CR Motor Assembly 1. Remove the housing. (Refer to 3.2.1) 2. Rotate the gear 67.2 toward you and release the carriage lock mechanism. Move the carriage to the center. 3. Loose the timing belt by pushing the driven pulley holder and remove the timing belt from the pulley of the CR motor side.
  • Page 82 Chapter3 Disassembly and Assembly Figure 3-12. Removing and Installing the CR Motor Assembly 3-15 Rev. A...

  • Page 83: Removing The Pf Motor Assembly

    EPSON Stylus Color 400 Service Manual 3.2.4.5 Removing the PF Motor Assembly 1. Remove the housing.(Refer to 3.2.1) 2. Remove the absorber tray assembly ;A. (Refer to 3.2.4.2) 3. Remove the following gears located on the left side of the printer mechanism. Refer to the figure below.
  • Page 84 Chapter3 Disassembly and Assembly Figure 3-14. Installing the PF Motor Assembly 3-17 Rev. A...

  • Page 85: Removing The Asf Assembly

    EPSON Stylus Color 400 Service Manual 3.2.4.6 Removing the ASF Assembly 1. Remove the housing. (Refer to 3.2.1) 2. Release the fixed hook from the inside of printer mechanism and remove the gear 34 from the roller axis of the ASF assembly.

  • Page 86: Removing The Paper Feed Roller Assembly

    During assembly, attach the cam fixing bush after installing CD roller-axis to the ASF frame. When installing right and left paper feed roller assemblies to the LD roller axis, a black paper feed roller assembly comes to right side and the EPSON standard color one comes to left on the axis.

  • Page 87: Removing The Right And Left Ld Roller Assembly

    EPSON Stylus Color 400 Service Manual 3.2.4.6.2 Removing the Right and Left LD Roller Assembly 1. Disassemble the ASF assembly and remove the paper feed roller assembly and hopper assembly from the ASF body. (Refer to 3.2.4.6) 2. Take out right and left compression springs 1.66 from the back of hopper assembly.

  • Page 88: Removing The Carriage Assembly

    Chapter3 Disassembly and Assembly 3.2.4.7 Removing the Carriage Assembly 1. Remove the housing. (Refer to 3.2.1) 2. Loose the timing belt by pushing the driven pulley holder and remove the timing belt from the pulley of the CR motor side. 3.
  • Page 89 EPSON Stylus Color 400 Service Manual Figure 3-19. Removing the Carriage Assembly 3-22 Rev. A...

  • Page 90: Removing The Pf Roller Assembly

    Chapter3 Disassembly and Assembly 3.2.4.8 Removing the PF Roller Assembly 1. Remove the housing.(Refer to 3.2.1) 2. Remove the carriage assembly.(Refer to 3.2.4.7) 3. Remove two screws(No.1) on the printer mechanism and disassemble the cable guide board. 4. Remove six upper paper guide assemblies, releasing their springs from the hooks of the frame. 5.
  • Page 91 EPSON Stylus Color 400 Service Manual Figure 3-21. Removing the Paper Eject Roller Assembly Figure 3-22. Removing the PF Roller Assembly 3-24 Rev. A...

  • Page 92: Removing The Pe Paper Detector Assembly

    Chapter3 Disassembly and Assembly 3.2.4.9 Removing the PE Paper Detector Assembly 1. Remove the housing.(Refer to 3.2.1) 2. Release two fixed hooks securing the PE detector assembly from the back of frame and remove the PE detector assembly, sliding it upward. Remove PE board assembly and PE lever if necessary. WORK POINT During assembly, make sure that the tip(sensor part) of the detector lever is in the hole of paper guide assembly.

  • Page 93: Removing The Hp Detector

    EPSON Stylus Color 400 Service Manual 3.2.4.10 Removing the HP Detector 1. Remove the housing. (Refer to 3.2.1) 2. Remove the cable from the HP detector and take it out after releasing the fixed hook. Figure 3-24. Removing the HP Detector 3-26 Rev.
  • Page 94 Chapter 4 Adjustment 4.1 Overview........................4-1 4.1.1 Required Adjustments ......................4-1 4.1.2 Required Adjustment Tools ....................4-1 4.2 Adjustment ......................4-2 4.2.1 Parallel Adjustment ........................ 4-2 4.2.2 Adjustment by Adjustment Program ..................4-4 4.2.2.1 Specification of Adjustment Program ................ 4-4 4.2.2.2 Initial Ink Charge Operation..................4-5 4.2.2.3 VH Voltage Writing Operation ...................

  • Page 95: Required Adjustments

    Chapter4 Adjustment 4.1 Overview This section describes adjustments required when the printer is disassembled and assembled after repair. 4.1.1 Required Adjustments Stylus Color 400 has following required adjustments.(Refer to table 4-1) Refer to figures for the actual procedure and perform appropriate adjustment for each exchanged unit. Table 4-1.
  • Page 96 EPSON Stylus Color 400 Service Manual 4.2 Adjustment This section explains specific procedures for each adjustment required for Stylus Color 400. 4.2.1 Parallel Adjustment When exchanging carriage assembly and or removing it along with disassembly of printer mechanism, perform parallel adjustment when assembling and set the standard distance from the surface of the print head to the paper surface.

  • Page 97: Adjustment

    Chapter4 Adjustment Figure 4-1. Setting of the Gage at Parallel Adjustment Figure 4-2. Parallel Adjustment Figure 4-3. Overlap of Head Surface and Cleaner Brade Rev. A...

  • Page 98: Adjustment By Adjustment Program

    EPSON Stylus Color 400 Service Manual 4.2.2 Adjustment by Adjustment Program In this printer, it is necessary to set correct information for each printer mechanism in order to maintain homogeneous printing function and quality, erasing dispersion of each printer mechanism’s characteristics.

  • Page 99: Initial Ink Charge Operation

    Chapter4 Adjustment 4.2.2.2 Initial Ink Charge Operation There is no ink charged in the ink path of the print head that is mounted on the print head and printer mechanism as spare parts. Therefore, when the following units are exchanged, perform initial ink charge and return the printers after making sure that ink is discharged correctly from the print head.

  • Page 100: Vh Voltage Writing Operation

    EPSON Stylus Color 400 Service Manual 4.2.2.3 VH Voltage Writing Operation There are dispersion in the PZT which are used for print head. It is necessary to set available and appropriate printing by registering mean values(VH voltage) of these PZT dispersion in the EEPROM.

  • Page 101: Print Head Angle Adjustment

    Chapter4 Adjustment 4.2.2.4 Print Head Angle Adjustment The dispersion of print head and carriage that is the base of installing the print head are caused during the production and gives bad influences on the angle of the print head. If the angle of the print head is not correct, overlap of colors is not performed correctly.
  • Page 102 EPSON Stylus Color 400 Service Manual 9. Loosen a screw securing the print head on the carriage. (It is not necessary to remove it completely: Refer to the figure below.) Figure 4-5. Position of the Print Head CAUTION Make sure to loosen the screw. If the screw is not loose, the print head angle can not be changed even if the position of the adjust lever is moved.

  • Page 103: Bi-D Adjustment

    Chapter4 Adjustment 4.2.2.5 Bi-D Adjustment This adjustment is to correct dispersion of printing positions caused by slippage of printing timing in right and left direction during the bi-directional printing. Therefore, it is required to perform this adjustment if the following operations are performed. 1)When exchanging the Print mechanism 2)When exchanging the C206 main board 3)When exchanging the CR motor...
  • Page 104 EPSON Stylus Color 400 Service Manual [Screen 1] [Screen-2] [Screen-3] [Screen-4] [Screen-5] [Screen-6] 4-10 Rev. A...

  • Page 105: Chapter 5 Troubleshooting

    Chapter 5 Troubleshooting 5.1 Troubleshooting....................5-1 5.2 Unit Level Troubleshooting .................5-3 5.2.1 Printer does not operate at power on................... 5-4 5.2.2 Error is detected ........................5-5 5.2.3 Failure occurs during printing ....................5-6 5.2.4 Printer does not feed the paper correctly ................5-7 5.2.5 Control panel operation is abnormal..................

  • Page 106: Troubleshooting

    EPSON Stylus Color 400 Service Manual 5.1 Troubleshooting The printer may exhibit different symptoms for the same problem, which makes troubleshooting more difficult. This section, however, provides simple and effective ways to facilitate troubleshooting. The following flowchart illustrates the main steps of the trouble shooting process.
  • Page 107 Chapter 5 Troubleshooting Table 5-3. Printer Condition and Panel Status Indicators Error status Recovery Power Ink Out Ink Out Paper Out (Black) (Color) Paper Out Load paper by pressing load/eject button. Paper jam condition Blink Eliminate a paper then press load/eject button.

  • Page 108: Unit Level Troubleshooting

    EPSON Stylus Color 400 Service Manual 5.2 Unit Level Troubleshooting When a problem occurs, you can identify the defective unit according to the symptoms exhibited. The table below lists the symptoms of certain problems. Once the problem is identified, refer to the flowchart that corresponds to the problem.

  • Page 109: Printer Does Not Operate At Power On

    Chapter 5 Troubleshooting 5.2.1 Printer does not operate at power on Figure 5-2. Flow Chart 1 Rev.A...

  • Page 110: Error Is Detected

    EPSON Stylus Color 400 Service Manual 5.2.2 Error is detected Figure 5-3. Flow Chart 2 Rev. A...

  • Page 111: Failure Occurs During Printing

    Chapter 5 Troubleshooting 5.2.3 Failure occurs during printing Figure 5-4.Flow Chart3 Rev.A...

  • Page 112: Printer Does Not Feed The Paper Correctly

    EPSON Stylus Color 400 Service Manual 5.2.4 Printer does not feed the paper correctly Figure 5-5. Flow Chart 4 Rev. A...

  • Page 113: Control Panel Operation Is Abnormal

    Chapter 5 Troubleshooting 5.2.5 Control panel operation is abnormal Figure 5-6. Flow Chart 5 Rev.A...

  • Page 114: Unit Repair C206 Psb/Pse Board

    EPSON Stylus Color 400 Service Manual 5.3 Unit Repair C206 PSB/PSE Board This section describes the problems related to the power supply board(C206 PSB/PSE). The table below provides various symptoms, likely causes, and checkpoints. The checkpoints refer to waveforms, resistance, and other values to be checked to evaluate the operation of each component.
  • Page 115 Chapter 5 Troubleshooting Table 5-6. C206PSB Power Supply Board (Continued) Symptom Condition Cause Checkpoint Solution +5V line is IC51 (L4962E) is Check the oscillation(5 Replace dead. dead. -pin) and switching (7- IC51. pin) waveform of IC51. (5-pin) (7-pin) 5-10 Rev.A...

  • Page 116: Unit Repair - C206 Main Board

    EPSON Stylus Color 400 Service Manual 5.3.1 Unit Repair - C206 MAIN Board This section describes the problems related to the main controller board(C206 main). The table below provides various symptoms, likely causes, and checkpoints. The check points refer to waveforms, resistance, and other values to be checked to evaluate the operation of each component.
  • Page 117 Chapter 5 Troubleshooting Table 5-8.Repair of the C206 MAIN Board (Continued) Symptom Condition Cause Checkpoint Solution Printing is Printing is not IC7 is dead. Check the trapezoidal Replace IC6, abnormal. execute. waveform at 3-pin of Q7 Q7, or Q9. on C206 main board. IC2 is dead.

  • Page 118: Repair Of The Printer Mechanism

    EPSON Stylus Color 400 Service Manual 5.4 Repair of the Printer Mechanism This section provides instruction for repairing the printer mechanism. It describes various problems, symptom, likely causes, checkpoints, and solutions. Select appropriate symptom from the table and check each parts and its function as described in the checkpoint.
  • Page 119 Chapter 5 Troubleshooting Table 5-10. Repair of the Printer Mechanism (Continued.) Symptom Condition Cause Check-point Solution Print head surface is Perform the cleaning Perform the Abnormal printing Only a particular dot not clean. operation several cleaning. causes abnormal (dot missing) times and check printing.
  • Page 120 EPSON Stylus Color 400 Service Manual Table 5-11. Repair of the Printer Mechanism (Continued) Symptom Condition Causes Checkpoint Solution Abnormal paper Paper is not fed. Friction of the PF Check if the PF Clean the PF roller feeding. roller. roller rotates when by the cleaning paper is not fed.
  • Page 121 Chapter 6 Maintenance 6.1 OVERVIEW ......................6-1 6.1.1 Cleaning........................... 6-1 6.1.2 Service Maintenance ......................6-1 6.1.3 Lubrication ..........................6-2...

  • Page 122: Service Maintenance

    Chapter 6 Maintenance 6.1 OVERVIEW This section describes the points and the procedures for maintaining the printer in its optimum condition. 6.1.1 Cleaning This printer has no mechanical components requiring regular cleaning. Therefore, the points described below are suggested to be checked for any dirt and make an appropriate cleaning if necessary. CAUTION Never use the chemical solvents, such as thinner, to clean the printer.
  • Page 123 EPSON Stylus Color 400 Service Manual 6.1.3 Lubrication The type and amount of oil and grease used on this printer are determined based on the results of internal evaluations. Therefore, specified type and amount of oil and grease must be applied at specified part of the printer mechanism when servicing the printer.
  • Page 124 Chapter 6 Maintenance Table 6-3. Lubrication Points (Continued) Standard Remarks <Lubrication Point> Use a syringe to apply it. The shaft for “GEAR, 16, 40.8” at “FRAME, LEFT” <Lubricant Type> G-26 <Lubrication Amount> Approx. 5mm long <Lubrication Point> When applying to the right bush, apply it Bush for “ROLER, PF”...
  • Page 125 EPSON Stylus Color 400 Service Manual Table 6-4. Lubrication Points (Continued) Standard Remarks <Lubrication Point> Completely wipe off any grease stack out A round hole of the left frame of ASF to inner side of ASF. (“GEAR, 34” is inserting to this hole) <Lubricant Type>...
  • Page 126 Chapter 6 Maintenance No.2 10mm No.1 "GEAR, 34" No.3 No.11 Rev. A...
  • Page 127 EPSON Stylus Color 400 Service Manual No.5 No.4 "GEAR, 23.2" "GEAR, 16, 40.8" No.4 "GEAR, 67.2" No.4 "COMBINATION GEAR, 8, 14.4" No.6 No.7 Rev. A...
  • Page 128 Chapter 6 Maintenance "HOLDER, PULLEY, DRIVEN" No.8 "HOPPER, ASSEMBLY" No.10 "FRAME, ASF" No.9 Rev. A...
  • Page 129 Appendix A.1 Connector Summary................... A-1 A.2 Connector Summary................... A-2 A.3 EEPROM Address Map ..................A-4 A.4 Circuit Board Component Layouts ..............A-8 A.5 Exploded Diagrams................... A-12...
  • Page 130 EPSON Stylus Color400 Service Manual A.1 Connector Summary Stylus Color 400 has the following primary component units; Main Board(C206 Main) Power Supply Board (C206 PSB/PSE) Printer Mechanism Figure A-1 below illustrates how these component units are connected. Figure A-1. Cable Connection...
  • Page 131 Appendix A.2 Connector Summary Following tables show connector pin assignment of the C206 MAIN board. Table A-1. Connector summary of the C206 MAIN board Connector Function Table to refer Parallel I/F connector Chapter1/Table 1-10 Serial I/F connector Chapter1 •ËControl panel Table A-2 •ËPE sensor Table A-3...
  • Page 132 EPSON Stylus Color400 Service Manual Table A-6. Connector CN7 Signal Name Function Phase drive signal (A) PF-A Phase drive signal (-A) Phase drive signal (B) PF-B Phase drive signal(-B) Table A-7. Connector CN8 Signal Name Function Black ink cartridge detect signal...
  • Page 133 Appendix A.3 EEPROM Address Map Address Explanation Setting QPIT Factory Settings Settings Password 0 Market 0:Word 1:Japan ( 1) 2:Custom(MJ-) 3:Custom(Stylus Color) 4:Custom (other name) 1st dot adjustment -40 n 40 (by 1/1440 inch) ( 1) Bi-D adjustment data -36 n 36 (by 1/1440 inch) ( 1) Uni-D adjustment -36 n 36 (by 1/1440 inch)
  • Page 134 EPSON Stylus Color400 Service Manual Address Explanation Setting QPIT Factory settings settings Interface wait time 0 to 255 (by second) Parallel I/F speed 0:High speed 1:Normal Reserved Reserved Print direction control 0:Bi-D 1:Uni-D 2:Auto CG table 0:PC437 1:PC850 ( 1)
  • Page 135 Appendix Address Explanation Settings QPIT Factory settings settigs Ink Counter Cb(total) 1count=100(ng) Ink counter CY(total) 1count=100(ng) Ink counter Cy(total) 1count=100(ng) Password 5 Ink counter Cc(total) 1count=100(ng) Ink counter Csm(total) 1count=100(ng) Ink counter Csc(total) 1count=100(ng) Reserved Reserved Password 6 Ink counter Rb Ink counter Ry Ink counter A 00H 2...
  • Page 136 EPSON Stylus Color400 Service Manual Address Explanation Setting QPIT Factory settings settings customized model name string of counter strings of model field for Device Rev.A...
  • Page 137 Appendix A.4 Circuit Board Component Layouts Figure A-2. C206 Main Board Component Layout Rev. A...
  • Page 138 EPSON Stylus Color400 Service Manual Figure A-3. C206 PSB Board Component Layout Rev.A...
  • Page 139 Appendix Figure A-4. C206 PSE Board Component Layout A-10 Rev. A...
  • Page 140 EPSON Stylus Color400 Service Manual Figure A-5. C206 PNL Component Layout A-11 Rev.A...
  • Page 141 Appendix A.5 Exploded Diagrams Figure A-6.Stylus Color 400 Exploded Diagram (1) A-12 Rev. A...
  • Page 142 EPSON Stylus Color400 Service Manual Figure A-7. Stylus Color 400 Exploded Diagram (2) A-13 Rev.A...
  • Page 143 Appendix Figure A-8. Stylus Color 400 Exploded Diagram (3) A-14 Rev. A...
  • Page 144 EPSON OVERSEAS MARKETING LOCATIONS EPSON AMERICA, Inc. EPSON DEUTCHLAND GmBH 20770 Madrona Avenue, Zülpicher Straße 6, 4549 Düsseldorf P.O. Box 2842 Germany Torrance, CA 90509-2842 Phone: (800)922-8911 Phone: (0211)56030 Fax: (310)782-5220 Telex: 8584786 EPSON UK LTD. EPSON FRANCE S.A. Campus 100, Maylands Avenue,...
  • Page 145 EPSON SEIKO EPSON CORPORATION...

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