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Epson 4003353 Service Manual
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Epson 4003353 Service Manual

Epson 4003353 Service Manual

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EPSON TERMINAL PRINTER
COLOR

SERVICE MANUAL

4003353

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Summary of Contents for Epson 4003353

  • Page 1: Service Manual

    EPSON TERMINAL PRINTER COLOR tyhs SERVICE MANUAL EPSON 4003353...
  • Page 2 All efforts have been made toensurethe accuracy of the contents of this manual. 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 consequence thereof.
  • Page 3 CERTIFIED REPAIR TECHNICIAN. MAKE CERTAIN THAT THE SOURCE VOLTAGE IS THE SAME AS THE RATED VOLT- AGE, 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: Product Description

    The chapters are organized as follows: CHAPTER 1. PRODUCT DESCRIPTION Provides general product overview, lists specifications, and illustrates the main components of the printer. CHAPTER 2. OPERATING PRINCIPLES Describes the theory of printer operation. CHAPTER 3. DISASSEMBLY AND ASSEMBLY Includes a step-by-step guide for product disassembly and assembly.
  • Page 5 Revision Issue Date April 27, 1994 Rev.-A Rev.-B October 4, 1994 Rev.-C November 30, 1994 January 11, 1995 Rev.-D REVISION SHEET Page /Contents 1 st issue Change the WARNING contents Change the explanation for the upper case removal 4-7 to 4-17 Incorporate the simple adjust method.
  • Page 6 TABLE OF CONTENTS CHAPTER 1. CHAPTER 2. CHAPTER 3. CHAPTER 4. CHAPTER 5. CHAPTER 6. APPENDIX PRODUCT DESCRIPTION OPERATING PRINCIPLES DISASSEMBLY AND ASSEMBLY ADJUSTMENTS TROUBLESHOOTING MAINTENANCE vi -...

  • Page 7: Table Of Contents

    Printer Initialization ........
  • Page 8 Figure 1-11. C137 PNL Board Component Layout ..... 1-19 Figure 1-12. Printer Mechanism (M-4A1O) ......1-20 Figure 1-13.

  • Page 9: Features

    Stylus Color Service Manual 1.1 FEATURES The Stylus Color is a 64- + 48-nozzle (monochrome and CMY) color ink jet dot matrix printer that uses new ink jet technology to achieve high-quality, high-speed printing. The major features of this printer are: Q Highquality color printing as a result of new inkjet technology.

  • Page 10: Specifications

    Product Description 1.2 SPECIFICATIONS This section provides statistical facts and other detailed intonation for the printer. 1.2.1 Printing Specifications On demand inkjet system Print system: Nozzle configuration: 64 nozzles ($ 4$ nozzles (16x Magenta Yellow Cyan ..() #l . .

  • Page 11: Table 1-3. Character Tables

    ISO Latin IT (Turkish) Bulgaria (Bulgaria) Abicomp BRASCII o supported SUpported Note: These fonts are not supported for EPSON Roman Tand EPSON Saris Serif H of scalable Fonts: LQ fonts Bitmap - EPSON Roman - EPSON Saris Serif - EPSON Courier...

  • Page 12: Paper Handling Specifications

    Ptvduct &SCf@th Paper Handling Specifications 1.2.2 Friction feed paper is fed from the built-in auto sheet feeder (ASF). Feeding method: Notes: The following operations are 1. Reverse feeding within 3 mm (O. 12in.) from the top edge of the paper or 16mm (0.63 in.) from the bottom edge of the paper.

  • Page 13: Figure 1-3. Printable Area For Cut Sheet

    Stylus Color Service Manual Cut sheet Printable area: Figure 1-3. Printable Area for Cut Sheet Envelope (Left margin) Figure 1-4. Printable Area for Note: A: The minimum top margin= 3 mm (0. 12 in.) B: The minimum left margin= 3 mm (O. ?2 in.) C: The minimum right margin is: A4 size: 3 mm (O.

  • Page 14: Figure 1-5. Adjust Lever

    Product Descfhtion Adjust lever setting: The adjust lever on the carriage unit must be the paper thiclmess, as shown m Table 1-6. Table 1-6. Adjust Lever Setting Lever Position LEFT (Vertical) RIGHT (Horizontal) Carriage Umt Figure 1-5. Adjust Lever 1.2.4 Ink Cartridge Specifications Black Type: Exclusive cartridge...

  • Page 15: Electrical Specifications

    Humidity Shock resistance Vibration resistance :1: For operating the pn”nter, conditions must be in the range shown in the figure below. : These conditions are acceptable when the printer is in its shipping container. : Without condensation. Humidity (% RH) .

  • Page 16: Reliability

    Product Llsscriptkm 1.2.7 Reliability MTBF: Total print volume: Printhead life: 1.2.8 Safety Approvals Safety standanis: Radio frequency interference (RFI): 1.2.9 Physical Specifications Dimension (W Weight stylus Colar &wvke Msnusl 4JIO0 power on hour (pOH) 75,0(X) pages (A4, Letter) 1$00 million dots/nozzIe 120V version: UL1950 with D3, CSA22.2 #950 with D3...

  • Page 17: Interface Specifications

    Stylus Color Service Manual 1.3 INTERFACE SPECIFICATIONS The Stylus Color is standard-equipped with an 8-bit parallel and serial interface. 1.3.1 Serial interface Specifications 8-bit parallel Data format: By STROBE pulse synchronization Synchronization: By BUSY and ACKNLG signals Handshaking: TTL compatible level Signal level: 36 pin 57-30360 (Amphenol) or equivalent Adaptable connector:...

  • Page 18: Table 1-9. Signal And Connector Pin Assignments For Parallel Interface

    If this signal goes LOW, the printer is initialized. The pulse width of this signal must be 50 @ or more. This signal goes LOW if the printer has a fatal error or runs out of paper. Pulled up to +5V through 1.0 KQ resistor in the printer.

  • Page 19: Parallel Interface Specifications

    Recommended I/F cable: Apple@ System Peripheral-8 cable Table 1-11. Signal and Connector Pin Assignments for Serial Interface Signal Name Pin No. * The 1/0 column indicates the data flow as viewed from the printer. Rev. A Buffer Space I/o’ Description...

  • Page 20: Operations

    1.4.1 Control Panel The control panel for this printer has 1 lock type, 5 ncm-lock type push buttons, and 14 LED indicators for easy operation of the various printer functions. J Courier...

  • Page 21: Panel Operation Atpoweron

    Turn on the printer while holding the Pause Rev. A when the printer is on. Blinks during power on and off sequence. when print data is in the input buffer. when the printer is out of paper. Blinks when a paper jam when the ink is exhausted.

  • Page 22: Default Settings

    Product Oesct’iptkm 1.4.3 Default Settings The printer can save some printer setting parameters that define its functions at initializatkn. You can change these parameters by using the printer’s default setting mode. 1.4.3.1 Default Setting Items You can use the det%ult setting mode to change the settings listed in the table below. Activate the default-setting mode by holding down the Economy/Condensed button while turning on the printer.

  • Page 23: Changing The Default Settings

    Italiana Espafiol Press the button. The printer prints the current settings using the selected language. It also prints a table showing how to change the printer settings. button to advance through the setting menu. The current printer settings are Press Font indicated by the Courier, Roman T (PS)~and San Se;if H (PS) LEDs.

  • Page 24: Table 1-17. Character Table Selection

    ISO Latin IT Bulgaria f. Repeat d and e to change other printer settings. The setting menu selection will return to the first menu after the lastmenu *l@ion is over. g. Turn off the printer. The setting is stored intonon-volatile memory.

  • Page 25: Errorconditions

    Hardware initialization is performed by: Turning on the printer. - %mdin~ the parallel interface INIT signal. (If the INIT signal is active when the printer is turned on, hardware initialization is started when the INIT signal becomes inactive.) When the hardware initialization is performed: - The printer mechanism is initialized.

  • Page 26: Main Components

    The reset IC (M51955 and ~ 592) is equipped with both a logic system and a power system. The 8M program ROM is used only fix the NJ.5P (National Language Support Printer) specification..

  • Page 27: Power Supply Board (C137 Psb/Pse Board)

    Power Supply Board (C137 PSB/PSE Board) consists of an RCC switching regulator circuit. This board is equipped with a power switch comected to the secondary circuit. Thus, if the printer is turned off, it can continue to operate in order to eject the paper and perform the head capping operation.

  • Page 28: Printer Mechanism (M-4Aio)

    Product 1.5.4 Printer Mechanism (M-4A1O) The M-4A1O printer mechanism is equipped with a 64-black printhead and M-color (CMY) printhead on the carnage unit. Resolution of 720 dpi is possible with special (non-absorbent) paper. The ink system has both a black pump unit and a coIor pump unit. Waste ink from each printhead is made to flow into the individual caps.
  • Page 29 Printer Mechanism........

  • Page 30: List Of Figures

    2.4.2.8 Figure 2-1. Printer Mechanism Block ......2-1 Figure 2-2. Structure of Printhead......2-2 Figure 2-3.

  • Page 31: Overview

    Stylus Color Service Manual 2.1 OVERVIEW This section describes the operating prinaples of the printer mechanism and the electrical circuits of the Stylus Color. 2.2 OPERATING PRINCIPLES OF THE PRINTER MECHANISM The Stylus Color printer mechanism is composed of the printhead unit, paper feed mechanism, carriage drive mechanism, pump mechanism, and various sensors.

  • Page 32: Printer Mechanism

    The printer mechanism of this printer uses a dropmnde-d inkjet system similar to the system used on all other EPSON ink jet printers. However, the printhead in this system is mmpletely redesigned to make it more mmpact and ensure a high level of reliability. The figure below shows the structure of the printhead and ink supply system.

  • Page 33: Figure 2-3. Principles Of The Printing Operation

    Stylus Color Service Manual Principles of the Printing Operation The printhead operates in one of two modes to inject ink from each nozzle: Normal state No electrical charge is applied to the MLP (Multi-Layer Piezoelectric) element attached to the back of the cavity, and pressure inside the cavity is kept at a constant level. Injecting state The head data signal is applied to the specific nozzle control line to select the active nozzle for printing, and the MLP element is gradually charged by the drive voltage.

  • Page 34: Figure 2-4. Microwave Mode Operation

    In microwave mode, the printer pMts the whole image as a single image rather than as continual lines. In this mode, the printer uses only 15 nozzles of row A of the nozzles (#1 to #lS). After printing the first pass, the printhead moves to a new position 15/360 inch forward.

  • Page 35: Carriage Drive Mechanism

    4-phase, 200-pole, hybrid-type stepping motor mechanism, allowing the printer to stop the carriage or change the carriage movement at any position. The position of the carriage is recognized by the home position sensor, and position information is fed back to the carriage drive control circuit.

  • Page 36: Platen Gapadjust Lever

    The platen gap adjust Iever, which is attached to the carriage unit, needs to be set to an appropriate oosition for the Paper thickness. To change the platm gap, put the printer in the PAUSE state, then ~ress the Font&& while holding dm& the-Alt button; the carriage unit moves the platen gap adjustment position automatically.

  • Page 37: Table 2-5. Drive Terms

    Stylus Color Service Manual Frequency Mode (PP$$) Paper loading 1600 ASF feed 1600 Paper feed Pump Drive 1 1800 Pump Drive 2 pF Motor Pinion Platen Driie Gear Paper Pickup Lever= Roller Hopper Figure 2-7. Paper Feed Mechanism Rev. A Table 2-5.

  • Page 38: Inksystem

    2.2.4 Ink System This printer’s ink system is composed of the fbllowing mechanisms: W Ink cartridge Pump mechanism Cap mechanism Waste ink drain tank Wiping mechanism The figure below shows a diagram of the rnk system. color head ..

  • Page 39: Figure 2-9. Pump Mechanism Block

    Stylus Color Service Manual Pump Mechanism 2.2.5 The paper feed motor drives the pump mechanism when the transmission gear is moved to the position where the paper feed motor disengages the pump mechanism gear trains, when the carriage unit is at the ink system home position. The figure below shows a block of the pump mechanism.
  • Page 40 Opmtlng Princ@8s Wve: Paper I%?@ Mechanism canaige ‘..- ..- . . . - . - ..- . . . : . : . : . : . : . : . : : : : : : : : : : : : ......: . : . : . : . : . : ....:.:.:$:.:.:.

  • Page 41: Table 2-6. Pump Mechanism Operation

    The pump draws ink from the printhead nozzles and drains it into the waste ink drain tank. The printer performs this operation to eliminate dust or bubbles within the nozzles. Figure 2-13 illustrates the pump operation. When the paper feed drive motor rotates CW (forward), the color pulley pumps in the wheel pump unit rotate in the direction of the arrow while squeezing the ink tube to push the ink inside the tube out to the waste ink drain tank.
  • Page 42 The pMter perfimns this operation automatically when print data is not received or when the printer power is turned off during the printing or ink system operations. (Since the power switch is equipped with a semndary circuit, this operation cart be performed.) Also this printer has 2 caps, 1 for the blackhead and 1 for the color head.

  • Page 43: Operating Principles Of The Electrical Circuits

    2.3.1 Operating Principles of the Power Supply Circuit The power supply circuitry for this printer is provided either by the C137 PSB board (120 VAC) or the C137 PSE board (220-240 VAC). Both boards are identical in design and functionality, except for the components in the primary circuit that accommodate the specified input voltage.
  • Page 44 *it that allows the CPU to remain active fbr a while after turned off. This allows the printkad to return to the capping position after power has the printer is been turned off. The CPU that is rnowted CXI the (Power @/ sipl.

  • Page 45: Operating Principlesofthe Main Control Circuit

    2.3.2 Operating Principles of the Main Control Circuit The main control circuit of this printer is the C137 MAIN board. This circuit is controlled by the 16-bit CPU H8/3003 (ICI), running at 14.7456 MHz. This CPU has a unique architecture capable of handling data on the data bus at either an 8-bit or 16-bit bus width.

  • Page 46: Reset Circuits

    ‘6 Figure 2-19. Reset 2.3.2.2 Sensor Circuits The following sensor circuits enable the C137 MAW board to monitor printer mechanism status: HP sensor A photocoupler-type HP (home position) sensor is attachd to the surfam of the printer mechanism to detect the carriage home position. A LOW level from the signal indicates that the carriage is m home position.

  • Page 47: Carriage Motordrivecircuit

    E05A96 (IC2), the serial data is moved into the reference voltage selection circuit and the voltage is changed. Therefore, when the printer is in the constant speed mode, this strobe pulse becomes inactive. The following table indicates the current duty of each carriage motor speed mode.

  • Page 48: Figure 2-22. Serial Data Transfer Procedure

    The following figure shows the contents of the 4-bit serial by the SLA7041MS driver. The step time of the reference voltage is determined by the interval time of the strobe pulse. v-+-l ‘=r* (Phase Signal) 4-bit Serial Data –-–-– STRB At this time, reference voltage selection circuit checks phase Figure 2-22.

  • Page 49: Paper Feed Motor Drive Circuit

    Stylus Color Sefvice Manual Paper Feed Motor Drive Circuit 2.3.2.4 The paper feed motor for this printer drives the following mechanisms: Paper feed mechanism Paper pickup mechanism Pump mechanism Driver IC SLA7041MS (XC14) drives the paper feed motor by a constant current. The operation principle is same as the carriage motor drive circuit.

  • Page 50: Printhead Drive Circuit

    Operating Principles Printhead Drive Circuit 2S.2.5 The pnnthead drive circuit for this printer is composed of the following two parts: Common drive circuit (trapezoidal drive pulse generation) H Head drive circuit (nozzle control built~ theprinthead) The W-bit thermal head driver SED5620D in the head drive circuit on the carriage is used as a nozzle selector to selectively drive the printhead nozzles.

  • Page 51: Figure 2-26. Dma Controller Operation

    Stylus Color Service Manual DMA Controller 2.3.2.6 Data from the host computer is received automatically by the /STB signal via the external Centronics interface. The data is input into the input buffer on the D-RAM (IC5). At this time, E05A96 detects the rising edge of the external /STB signal and outputs the /ST’BDMA (strobe DMA request) signal to the CPU.

  • Page 52: D-Ram Refreshment Controller

    Opwating Pr’inc@es D-RAM Refreshment Controller 2.3.2.7 The H8 CPU is eauimxd with a the refresh controller into the internal mntroller. This CPU can contact the 16-bit ien’~ IC5 D-RAM which is a 2 CAS type. The fallowing table lists the method between the H8 CPU and the 2 CAS BRAM.

  • Page 53: Ink System Management

    Stylus Co/or Service Manual INK SYSTEM MANAGEMENT This section explains how the ink system is system and to ensure high-quality output. operations: Power On Cleaning Selection Micro Absorbing Cleaning 9 Power Off Print Start Refresh Standby H Fail Absorbing Ink Cartridge Replacement These ink system operations are controlled by the following counters and timers: Refresh timer Flashing counter...

  • Page 54: Inkoperations

    Opemting Principles 2.4.1 Ink Operations There are various ink operations that can be perfOrrrd selectively by the printer. 2.4.1.1 Power On Operation This operation is performed when power is turned on. There are four separate sequences of steps, depending on the following a.mditions: 1.

  • Page 55: Cleaning Selection Mode

    1. If the carriage is not in the home position, moves the carriage to the home position. 2. If paper is in the printer, ejects the paper; if paper is not in the printer, releases the carriage lock. 3. Performs the home position seek.

  • Page 56: Micro Absorbing Cleaning Operation

    5. Performs the fail absorbing operation (including the flushing operation). 2.4.1.4 Power Off Operation This operation ensures the carriage is in the home position when the printer turns off, and prevents the disengage gear from turning continuously when the printer turns off.

  • Page 57: Refresh Operation

    If 3 seconds elapses after an RFSH signal, this operation is performed immediately. Also, if 10 seconds elapses, the printer enters the standby mode. 1. Moves the carriage to the flushing position. (If only the black head is being flushed, moves the black head on the color cap position.)

  • Page 58: Ink Cartridge Replacement Operation

    3. The AH button is pressed or until 10 semnds elapse.) While the printer is m this waiting status, performs the following step (3-1) and then advances to step 4. 3-1. Performs the fivepulse flushing operation every 5 secmds (blackhead only).

  • Page 59: Wiping Operation 1

    1. Sets the D/E lever (moves the carriage to the D/Elever set start position). Performs the PF system compensation. 3. Pauses the printer (waits for the D/E gear to move). 4. Releases the pressure to the D/E holder. 5. Moves the carriage to the home position.

  • Page 60: Micro Absorbing Operation

    1. Releases the carriage lock (If paper is loaded, this operation is invalid.) 2. Moves the carriage to the adjust lever operate position. 3. PUtS the printer in pause mode. (When the Ah button is pressed or if 60 seconds elapses, the carriage returns to the home position automatically.)

  • Page 61: Timer (Monochrome And Cmy Head)

    This timer eliminates an increase in the viscosity of the ink inside the printhead nozzles or elimina tes the air bubbles that can block the cavity of the printhead. This timer confirms the time up from the EEPROM when the printer is turned on. (Time Up Interval: 10 days.) The time up values areas follows:...

  • Page 62: Protect Counter

    2.4.2.8 The protect counter A or Ink amount counter R is stored into the EEPROM on the main board, and while the printer is on, this data is stored into the RAM on the main board. Protect counter A This counter is used to manage the total amount of drained ink If the counter value is equal to or exceeds the error on the control panel and maintenance is required.
  • Page 63 3.2.4 Printer Mechanism (NP4A1O) Removal ......3.2.5 Printer Mechanism Disassembly....... 3.2.5.1 Printhead Unit Removal .

  • Page 64: Overview

    If ink comes into contact with your skin, wash it ofl with soap and water. If irm”tation occurs, contact a physician. A lithium battery is installed on the C137MXN board of this printer. Be sure to obseme the follom”ng instructions when servicing the battery: Keep the battery away from any metal or other batteries so that electrodes of opposite polarity do not come in contact with each other.

  • Page 65: Disassembly And Assembly

    Disassembly and Assemb/y 3.2 DISASSEMBLY AND ASSEMBLY Follow the precautions in Section 3.1.1 when disassembling the printer. TMS section consists of the subheads shown in the diagram below. See the exploded view of the printer in the Appendix, if necessary.

  • Page 66: Upper Case Removal

    Disassembly and Assembly Upper Case Removal 3.2.1 Remove the printer cover by releasing the 2 tabs holding it to the upper case. 2. Remove the paper support by releasing the 2 tabs Remove the paper guide by releasing the z tabs holding it to the center while you pressing the =rriage lock lever.

  • Page 67: Power Supply Unit (C137 Psb/Pse Board) Removal

    CBN (0) (M3x6) screw fixing the earth line from the AC cable to the earth plate. 5. Push in the locking tab and take out the power supply unit by sliding it toward the back of the printer. C137 Figure 3-4.

  • Page 68: Main Controller

    3.2.3 Main Controller (C137 MAIN Board) Removal 1. Remove the uppercase. (See Section 3.2.l.) 2. Remove the grounding plate from the shield plate. 3. Remove the 4 CBB (M3x12) screws securing the shield plate to the lower case. 4. Remove the 2 CBB (M3x12) screws securing the Type-B interface cover to the lower case. Grounding Plate CBB(M3X12) \ kl= ,...,,, - x m:...
  • Page 69 C137 MAIN board. When you replace the main board, initialize the EEPROM contents as follows; 1) Reassemble the printer. 2) Turn the pn”nter ON while hold down IAltJ, [Font], ILoadlEject] and [Pause] buttons on the control panel.
  • Page 70 3. Remove the main controller. (See section 3.2.3.) 4. Remove the 4 CBN (M4x13) screws and take out the printer mechanism. Wipe off any ink around the end of the ink drain tube when you remove the printer mechanism. I When reinstalling the printer mechanism, check that the waste ink drain tube is properly...

  • Page 71: Printer Mechanism Disassembly

    3.2.5.1 Printhead Unit Removal 1. Remove the printer mechanism. (See section 3.2.4.) 2. Move the carnage to the middle of the printer while pressing the hook that fixes the carriage unit to the home position. 3. Pull the ink cartridge clamp toward you and remove the ink cartridge.
  • Page 72 Stylus Color Service Manual Disassembly and Assembly CBB(P)(M3X11) ‘P)(M3x1 Head Black , Figure 3-8. Black or Color Head Removal Nose (For Black Head) Figure 3-9. Head Spacer Position 9 When removing the color or Mark head, do lose the that is fixed to spacer each head.

  • Page 73: Carriage Unit Removal

    3.2.5.2 Carriage Unit Removal 1. Remove the printer mechanism. (See section 3.2.4.) 2. Move the carriage to the left side of the printer while pressing the hook that fixes the carriage to the home position. 3. Remove the 2 CBN (0)

  • Page 74: Pump Unit Removal

    Stylus Color Sewks Manual Pump Unit Removal 3.2.5.3 1. Remove the printer mechanism. (See section 3.2.4.) 2. Remove thecarriageunit. (See section3Q.5.2.) 3. Remove the CBN (M3x5) screw securing the pump unit to the bottom frame. 4. Push the pump unit outward while releasing the tab at the bottom side of the pump unit, and then lift up the pump unit.

  • Page 75: Cleaner Head Replacement

    Disassembly and Assembly Cleaner Head Replacement 3.2.5.4 1. Remove the printer mechanism. (See section 3.2.4.) 2. Use tweezers to unhook the cleanerhead from thehookon the cleaning roller. Figure 3-13. Cleaner Head Replacement Keqn”ng the cleaner head clean is extremely important to keep the ink injection system working propmly in theprinthead, and itdimctly aflects pgntingquality.

  • Page 76: Cr Motor Removal

    Figure 3-14. CR Motor Removal PF Motor Removal 3.2.5.6 1. Remove the printer mechanism. (See section 3.2.4.) ~ 2. Remove the 2 CBN (M3x6) screws and then remove the PFmotor. Figure 3-15. PF Motor Removal Rev. A f?kassemblyandA ssembly...

  • Page 77: Carriage Home Position Sensor Removal

    1. Remove theprinter mechanism. (Seesection32.4.) 2. Disconnect the connector horn the PE sensor. 3. Rotate the printer mechanism upside down; use tweezers to release the 2 hooks securing the PE sensor to the paper feed roller assembly; then remove the PE sensor.

  • Page 78: Paper Feed Roller Assembly Removal

    Paper Feed Roller Assembly Removal 3.2.5.9 1. Remove the printer mechanism. (See section 3.2.4.) 2. Remove the carriage unit. (See section 3.2.5.2.) 3. Remove the pump unit. (Seesection3.2.5.3.) 4. Remove the tension spring holding the tension roller assembly to the sub frame.

  • Page 79: Upper Frame Removal

    3.2.5.10 Upper Frame Removal 1. Remove the printer mechanism. (See section 3.2.4.) 2. Remove the carriage unit. (See section 3.23.2.) 3. Remove the E-ring securing the ~ob shfi to the sub frame; then remove the knob with the knob shaft from the side frame (R).
  • Page 80 Chapter 4 Adjustments Table of Contents 4.1 OVERVIEW 4.1.1 Destination Data Writing Operation ......Q-z 4.1.2 Bi-D (Bidirectional Printing) Alignment Adjustment .
  • Page 81 This section describes the adjustments that are required when the printer is disassembled and assembled after repair. Since this printer has both the black head and color head, it needs new adjustments not required fix previous printers. Perform the suitable adjustments by referring to the following table.
  • Page 82 Therefore, this setup value must be written into the EEPROM when the MAIN board or the EEPROM chip is replaced. 1. Comect the PC to the target printer and turn the printer on. 2. Execute BASIC on the PC and runtheprogram “VERxxx.BAS”.
  • Page 83 Bi-D (Bidirectional Printing) Alignment Adjustment 4.1.2 The bidirectional alignment is required when the printer mechanism, the MAIN board, or the printhead (board) is replaced. By perfo rming this adjustment, a compensation value is determined to compensate for the deviation in the print position. This deviation can be caused by the different print speeds due to the tolerance of the mechanical components, and the deviation of print timing between odd-numbered lines and even-numbered lines in bidirectioml printing.
  • Page 84 (The printer pMts the check pattern with a sample compensation value.) 4. The printer pMts a sample such as the one shown in Figure 4-1. 5. If the sample printing isnotverticdy aligned in both the odd-numbered lines (Mackline) and even-numbered lines (magenta), enter a compensation value in the range from-8 to +8.

  • Page 85: Head Angle Adjustment

    Stylus Color Service Manual Head Angle Adjustment 4.1.4 Black The black head angle adjustment is required when the black head is replaced or disassembled. If this adjustment is not correct, the white banding problem might occur or the color head timing might not match the black head timing.
  • Page 86 3. When the main menu appears, choose “Head Angle Confirmation Pattern Printing” by entering “2” from the keyboard. (The printer prints the check pattern with a sample name. ) When replacing both the blackhead and the color head, always adjust the color head angle first.
  • Page 87 Adjustments Turn the printer power off at once. Move the carriage to the center the two ink cartridges. Remove the rubber cap that covering a head screwat a side of color inkcartridge and then loosen(but do not remove) three screws. (Refer to figure 4-6.) Figure 4-6.
  • Page 88 Stylus Color Semicp Manual 11. After replacing the angular spacer, reassembly the ink cartridge holder and reinstall the ink cartridges. Use the BASIC program to veri$ the black head angle. Confirm the angle condition by re-performing the step 1 to step6, and if the angle condition is wrong you must perform this adjustment until the head angle becomes correct.
  • Page 89 When the main menu appears, choose “Head Front/Rear Vertical Position Confirmation” by entering “3” from the keyboard. (The printer prints the check pattern with a sample mme.) When replacing the black head, always adjust the black head angle first, because the black- color head vertical adjustment is based upon the black head angle.
  • Page 90 4. In Figure 4-8, the vertical position is correct when both the magenta line and the black line are aligned [as in position OK (0)]. If the vertical position is correct, turn off the printer. If the black and magenta lines are not aligned, perform the vertical adjustment as described in steps 5-10.
  • Page 91 If the sample is incorrect, change the thickness level of the linear spacer and perform this adjustment until the two black and magenta lines are aligned at the position “OK (0)”. When you complete this adjustment, quit out of the BASIC program and turn off the printer. Rev. D...
  • Page 92 ‘m-’ (Angle Adjustment Concept) Figure 4-12. Connect the PC to the target printer and turn the printer on. Execute BASIC on the PC and run the program “VERXXX.BAS”. When the main menu appears, choose ‘Head Angle Confirmation Pattern Printing” by entering fron the keyboard.
  • Page 93 Figure 4-15. Spacer Select Judgement Turn off the printer at once. 6. Move the carnage to the center manually, and loosen (but do not remove) the screw securing the color head to the carriage.
  • Page 94 Adjustments Stylus Color Service Manual 7. Remove the rubber cap that covering a head screw at a side of color Ink cartridge and then Ioosen(but do not remove) three screws. (Refer to figure below.) Figure 4-16. Removing the Rubber Cap spacer angular(left side only) to new one with referringthe figure below.
  • Page 95 If the sample is incorrect, repeat steps 5-9 until the upper sample lines are aligned with one another and the lower sample lines are exactly equidistant between one another (as shown at B in Figure 4-15). When you complete this adjustment, turn off the printer. Rev. D Stylus Color Service Manual...
  • Page 96 Stylus Color Service Manual 4.1.7 Platen Gap Adjustment This adjustment is required when replacing or removing the carriage unit from the printer mechanism. The distance between the printhead nose and the paper surface should be adjusted to 1.1 mm. 1. Attach the thickness gauge (marketing gauge) at the left side adjust position (on the paper guide plate) shown in the figure below so that one side hooks a paper feed pinch roller unit.
  • Page 97 Gauge Front Frame Figure 4-19. Confirming the Gap 4.1.8 Internal Timer Reset Operation This operation is required when replacing the M-4A1O printer mechanism. There are 6 timers in this printer: 1. Refresh timer 2. Timer (monochrome and CMY) 3. Flushing level decision timer 4.
  • Page 98 UNIT LEVEL TROUBLESHOOTING 5.2.1 Printer does not operate at power on ......5.2.2 Error is detected ......... . .

  • Page 99: Overview

    Stylus Color service Manuel OVERVIEW 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 troubleshooting process.
  • Page 100 Buttons Service maintenance request. (Change the waste ink drain Blink Blink Blink tank and meet the oounter.) Blink Turn off the printer and turn it on again. Manual Recovery the new ink cartridge Rev. A o . . . :...

  • Page 101: Unit Level Troubleshooting

    Table 5-4. Symptom and Problem Symptom Printer does not operate at power on Error is detected Failure occurs during printing Printer does not feed the paper correctly Control panel operation is abnormal Rev.A Problem LEDs do not light up.

  • Page 102: Printer Does Not Operate At Power On

    Troubleshooting 5.2.1 Printer does not operate at power on START Check the output vottage of the C137 I PSBPSE a t CN2. I Replace the C137 MAIN board. !5-4 Styk4# C&M Mthea)rlect Replace the fuse and disconnect CN5 on the C137 MAIN board.

  • Page 103: Error Is Detected

    Replace the waste ink absorbing material, and reset protect counter. (See Chwter6.) E!E!!?- Rev. A Turn the printer Replace the ink cartridge with a new one. Check CR motor and drivers. If they are OK, replace the C137 MAIN board,...
  • Page 104 Tnwbkshooting 5.2.3 Failure occum during printing START Run the Seu-test pn:l ciaimhg. Sty&s Cow ~Mww8/ C4nnectthe Adjustthe priM4gnment or ?2” , (see Chapter4.) Check Seethe sedion drivers, and printhead -w-d for shorts. If they are @ter*ism OK, replace the C137 MAIN board.

  • Page 105: Printer Does Not Feed The Paper Correctly

    Stylus Color Service Manual Printer does not feed the paper correctly 5.2.4 Check the PF motor and drivers. If OK, replace the C137 MAIN board, & Rev. A Load the paper Correotly. Verify that the paper path is clear. Also oonfirm that...

  • Page 106: Control Panel Operation Is Abnormal

    Tmbbhootlng 5.2.5 Control panel operation is abnormal START Replace the control panel. StyklScdurSandce~ ccmectthe Cmttd C137 Replace the MAIN H Rev. A...

  • Page 107: Unit Repair - C137 Psb/Pse Board

    Tnwb/eshooting StY/us Color Service Manual UNIT REPAIR - C137 PSB/PSE BOARD This section describes the problems related to the power supply board (C137 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 108: Unit Repair - C137 Main Board

    - sewkemnua/ Tivubleshootina UNIT REPAIR - C137 MAIN BOARD This desuibes the problems related to the main contder board (C137 MAIN). The table sxtion below provides various symptoms, likely causes, and checkpoints. ‘I& checkpoints refer to waveforms, resistance, and other values to be checked to evaluate the operation of each component.
  • Page 109 Styltas Color Service Manuai Table 5-6. Repair of the C137 MAIN (Cont.) Symptom Condition Carriage The carriage does not does not ICI 5 is defective. operate operate at all. normally. IC2 is defective. Self-test Self-test is printing is not executed. abnormal.

  • Page 110: Unit Repair - Printer Mechanism (M-4Aio)

    ThnlMMhoowg 5.5 UNIT REPAIR -PRINTER MECHANISM (M-4A1O) to W printer problems related troubleshooting procxxiures in Table $7. Repair of the PrhMer Mechanism Table 5-7. Condition Symptom Foreign substances are The pump The PF motor lodged in the gear fai~ to rotate at mechanism of the mechanism.
  • Page 111 Stv/us Co/or service Manual Table 5-7. Repair of the Printer Mechanism (Cont.) Symptom Condition rhe carriage %inting is ]erformed. I The head cable is A particular dot printed. A dot is not printed Abnormal occasionally. printing. Printhead characters are not aligned.
  • Page 112 Tbubkshodng Table Repair of the Printer Symptom condition mn ~~n~ VB@y is lodged in the paper path. Papr feeding F’awr is ‘ot p-r is not fed. ~=mam fed normally. defective. The paper feed motor is defective. !S14 Stylus coblf &rWk9 M9nud Mechanlem (Cont.)
  • Page 113 Maintenance Chapter 6 Table of Contents 6.1 PREVENTIVE MAINTENANCE 6.2 SERVICE MAINTENANCE 6.2.1 Printhead Cleaning ......... 6-2 6.2.2 Waste Ink Drain Tank Replacement .

  • Page 114: Preventive Maintenance

    Stylus Color Service Manual 6.1 PREVENTIVE MAINTENANCE Although this printer is designed so that no specific maintenance is required on a regular basis, it is recommended that you clean the printer thoroughly whenever you get a chance to do so. You can...

  • Page 115: Service Maintenance

    Therefbre, perform this printhead cleaning operation only if print quality dedines, in order to avoid wasting ink. 1. Turn the printer on and press the Paw button to pause the printer. Make sure that the PAUSE LED is on.

  • Page 116: Lubrication And Adhesive

    The printer must be lubricated properly when the printer is disassembled for component replacement, or if the mechanical noise exceeds a certain level. EPSON recommends only the lubricants listed in table below for this printer, both of which have been tested extensively and found to comply with the requirements of this printer mechanism.
  • Page 117 Maintenance Stylus Color service Manual “.7 Figure 6-1. Lubrication and Adhesive Points (1) Rev. A...
  • Page 118 Stylus Co/or Service Manual Maintenance Figure 6-2. Lubrication and Adhesive Points (2) Rev. A...
  • Page 119 Appendix Table of Contents CONNECTOR SUMMARY CIRCUIT DIAGRAM A.3 CIRCUIT BOARD COMPONENT LAYOUT A.4 EXPLODED DIAGRAM Figure A-1. Interconnection of Major Components ..... . A-2 Figure A-2.
  • Page 120 - ..- ......- ......Components Appendix Printhead Unit ..- . z ..Sensor ‘ e nsor Printer Mechanism (M-4A1O)
  • Page 121 Dcoutput (+5VH5V) (to C137 MAIN) Pin Assignments - CN1 Description Strobe signal Data strobe eignal ACK signal Busy signal Paper end signal Printer select signal Auto line feed signal Not connected Ground Frame ground +5V DC Ground INIT signal Error signal...
  • Page 122 Stylus Color service Manual Table A-3. Connector Pin Assignments - CN2 Name /READY IRESET /CMREQ /WRRDY /RDREQ /HWR 1 9 - 2 4 A3-AO 2 5 - 2 8 D15-D8 2 9 - 3 6 Table A-4. Connector Pin Assignments - CN3 Name TXD- RXD-...
  • Page 123 Appendix Connector Table A-6. Name &v Table Connector A-7. CR/A CRCOM Table A-8. Connector Pin Assignments - CN7 Name PF/A PF/B PFCOM Table A-9. Connector Name A-10. Connector Pin Assignments - CN9 Table Name I HPV A-1 1. Connector Pin Assignments- CN1O Table Name 1,3,5,7...
  • Page 124 Stylus Color Service Manual Table A-1 2. Connector Pin Assignments- CNI 1 Name BCLK BLAT 11-16 17-22 Table A-13. Connector Pin Assignments - CN12 Name CCLK CLAT C c o 11-16 18-22 Rev. A Description Ground Clock signal for black head Ground Latch signal for black head Ground...

  • Page 125: Component Layout

    StY/us Color Service Manual -LED9 1161 — ‘ LED I O t9ED, , 1 @ 2 - W - I ? ” LED I 2 qD,4 q,;;; ’ -’w- LED1 6 2 0 1 4 1 5 5 Figure A-9. C137 PNL Rev.
  • Page 126 Stylus Color Service Manual 3.3M -.,.”- ‘ b i b ’ - { % ” - ” ’ - - - - - - o. IU O.lu Figure A-3. C137 MAIN Rev. A TP27 & . . . Board Circuit Diagram (2) Appendix CNlt...
  • Page 127 A p p e n d i x l——————— -. .. Figure A-4. (X37 PSB Board Circuit Diagram A-1 O stylus-sewicem~l UI*” -< x ..[N & Rev. A...
  • Page 128 Stylus Color service Manual 2’ ~“n+-: ‘--l -n-= > Figure A-5. C137 PSE Board Circuit Diagram I .1 I I NN N N N I – ..1 Afmendix...
  • Page 129 Appendix 5 NO 5N O 5N O LOATA LLAT LCLK LCLR CN 1 ~1 o Sw 1 Figure A-6. C137 PNL Board Circuit Diagram A-12 Sty/us Color sefvk@Mmt4d @LEo7 “ L E D 16 0.1 u WD — ~LEO10 c1 m @LED9 @LEt) @LED...
  • Page 130 Sty/us Co/or Service Manual A.3 CIRCUIT BOARD COMPONENT LAYOUT --m9Ez UC+43 CIC17 Igcls C)C19 Ucla CICS3 fgcs Clara m e ! , ~n UC7 Figure A-7. C137 MAIN Board Component Layout Rev. A R3E RIi5 ~nom R1E5 R109 Cs rg mm cm Ig Igcll Appendix 1 .
  • Page 131 Styhscabf sOndce Aml&d Appendx RF17 -4+ a ,— Figure A-8. C137 PSB/PSE Board Component Layout Rev. A A-14...
  • Page 132 EPSON OVERSEAS MARKETING LOCATIONS EPSON AMERICA, INC. Madrona Avenue, 20770 P.O. Box 2842 Torrance, CA 90509-2842 Phone: (800) 922-8911 Fax: (310) 782-5220 EPSON UK LTD. campus 100, Maylands Avenue, Hemel Hempstead, Herts. HP27EZ, U.K. Phone: 442-61144 Fax : 442-227227 EPSON IBERICA, S.A.

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