Epson L1800 Service Manual
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Epson L1800 Service Manual

Color inkjet printer
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SERVICE MANUAL

Color Inkjet Printer
L1800
Confidential
SEIJ13-007

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Summary of Contents for Epson L1800

  • Page 1: Service Manual

    SERVICE MANUAL Color Inkjet Printer L1800 Confidential SEIJ13-007...
  • Page 2 The contents of this manual are subject to change without notice.  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 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

    Indicates an operating or maintenance procedure, practice, or condition CHAPTER 5.MAINTENANCE that, if not strictly observed, could result in damage to, or destruction of, Provides preventive maintenance procedures and the lists of Epson- equipment. approved lubricants and adhesives required for servicing the product.
  • Page 5 Revision Status Revision Date of Issue Description February 10, 2014 First Release Confidential...
  • Page 6 L1800 Revision A CONTENTS Chapter 1 Product Description 3.2.7 Upper Housing / Printer Cover ..............50 3.2.8 Upper Housing Support Assy ..............52 1.1 Operation Buttons & Indicators (LEDs)..............4 3.3 Removing the Boards ..................53 1.1.1 Operation Buttons ..................4 3.3.1 Board Assy (Main Board/Power Supply Board) ........
  • Page 7 L1800 Revision A Chapter 5 Maintenance 3.7.1.2 Adapter .................... 101 3.7.2 Ink Supply Tube Assy section ..............102 5.1 Overview ......................134 3.7.2.1 Tube Guide Sheet/Tube Guide Sheet Sub ........102 5.1.1 Cleaning ....................134 3.7.2.2 Tube Guide Sheet (w/Tube Guide Sheet sub) ......... 102 5.1.2 Service Maintenance ................

  • Page 8: Product Description

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

  • Page 9: Operation Buttons & Indicators (Leds)

    L1800 Revision A 1.1 Operation Buttons & Indicators (LEDs) 1.1.3 Operation Buttons & LEDs Functions Detailed information on the buttons and LEDs functions are listed below. 1.1.1 Operation Buttons Table 1-3. Operation Button Functions The printer has the following four operation buttons.
  • Page 10 L1800 Revision A Note : --:No change Table 1-4. Indicators (LEDs) Function Flash: Repeats turning On and Off every 1.25 seconds. Indicators (LEDs) Flash at high speed: Repeats turning On and Off every 0.5 seconds. Printer Status Priority* Flashes alternately 1:Same as the “Flash”...

  • Page 11: Errors & Remedies

    L1800 Revision A 1.1.4 Errors & Remedies Table 1-5. Errors & Remedies Error Occurrence terms How to release Fatal error When the unit detects an error which is impossible to work correctly. Turn off and restart the unit. (If occurs repeatedly, it must be repaired.) Ink waste pad overflow error When the ink waste fluid comes full.

  • Page 12: Troubleshooting

    C H A P T E R TROUBLESHOOTING Confidential...

  • Page 13: Overview

    L1800 Revision A 2.1 Overview This chapter describes unit-level troubleshooting. 2.1.1 Troubleshooting according to Error Messages After checking the printer LED and STM3 error indications, you can grasp the fault location using the check list in this section. When you find the fault location, refer to Chapter 3 “Disassembly and Reassembly”...
  • Page 14 L1800 Revision A Table 2-2. Troubleshooting of Communication Error Occurrence Faulty Part/ Phenomenon Detail Check Point Remedy Timing Part Name At power-on The printer does not operate at all. Panel FFC 1. Check that the Panel FFC is connected to the Panel Board 1.
  • Page 15 1. Configure the USB ID setting. Refer to Chapter 4 “Adjustment”. Printer Driver 1. Check that the printer driver for L1800 has already been 1. Install the printer driver for L1800. installed. 2. Check that the connected printer is L1800.
  • Page 16 L1800 Revision A Table 2-3. Troubleshooting of Paper Out Error Occurrence Faulty Part/ Phenomenon Detail Check Point Remedy Timing Part Name At operation When the Paper Switch is ASF Assy. 1. Check the LD Roller or Retard Roller of the ASF Assy for paper 1.
  • Page 17 L1800 Revision A Table 2-3. Troubleshooting of Paper Out Error Occurrence Faulty Part/ Phenomenon Detail Check Point Remedy Timing Part Name At operation Paper Mismatch Error is PE Sensor 1. Check that the connector cable of the PE Sensor is securely 1.
  • Page 18 L1800 Revision A Table 2-4. Troubleshooting of Paper Jam Error Occurrence Faulty Part/ Phenomenon Detail Check Point Remedy Timing Part Name At operation At the time of paper ejection, the – 1. Check that the size of the fed paper is not larger than that of the 1.
  • Page 19 L1800 Revision A Table 2-5. Troubleshooting of Multi-feed error Occurrence Faulty Part/Part Phenomenon Detail Check Point Remedy Timing Name Any time During manual double-sided ASF Assy 1. Check that the Retard Roller Assy is moving properly during the 1. Attach the Extension Spring on the back side printing, multiple sheets are fed feeding operation.
  • Page 20 L1800 Revision A Table 2-7. Troubleshooting of Fatal Error Occurrence Faulty Part/ Phenomenon Detail Check Point Remedy Timing Part Name At power-on At power-on, the CR Motor does CR Motor 1. Check the CR Motor connector cable for damages. 1. Replace the CR Motor with a new one.
  • Page 21 L1800 Revision A Table 2-7. Troubleshooting of Fatal Error Occurrence Faulty Part/ Phenomenon Detail Check Point Remedy Timing Part Name At power-on The power-on sequence is CR drive 1. Check that the Carriage Shaft is lubricated with grease. 1. Wipe the surface of the Carriage Shaft with a...
  • Page 22 L1800 Revision A Table 2-7. Troubleshooting of Fatal Error Occurrence Faulty Part/ Phenomenon Detail Check Point Remedy Timing Part Name At power-on At power-on, the APG Motor APG Motor 1. Check that the connector cable of the APG Motor is connected 1.
  • Page 23 L1800 Revision A Table 2-7. Troubleshooting of Fatal Error Occurrence Faulty Part/ Phenomenon Detail Check Point Remedy Timing Part Name At power-on While the power-on sequence is APG Sensor 1. Check the APG Sensor connector cables is connected to the 1.
  • Page 24 L1800 Revision A Table 2-7. Troubleshooting of Fatal Error Occurrence Faulty Part/ Phenomenon Detail Check Point Remedy Timing Part Name At power-on While the power-on sequence is ASF Motor 1. Check that the connector cable of the ASF Motor is connected 1.
  • Page 25 L1800 Revision A Table 2-7. Troubleshooting of Fatal Error Occurrence Faulty Part/ Phenomenon Detail Check Point Remedy Timing Part Name At power-on While the power-on sequence is Relay FFC 1. Check that the Relay FFC is connected to the Relay Board 1.
  • Page 26 L1800 Revision A Table 2-7. Troubleshooting of Fatal Error Occurrence Faulty Part/ Phenomenon Detail Check Point Remedy Timing Part Name At power-on At power-on, the Carriage Unit Sensor FFC 1. Check that the Sensor FFC is connected to the CR Encoder 1.
  • Page 27 L1800 Revision A Table 2-7. Troubleshooting of Fatal Error Occurrence Faulty Part/ Phenomenon Detail Check Point Remedy Timing Part Name At power-on At power-on, the PF Roller PF Scale 1. Check that the PF Scale is inserted in the slit of the PF Encoder 1.
  • Page 28 L1800 Revision A Table 2-7. Troubleshooting of Fatal Error Occurrence Faulty Part/ Phenomenon Detail Check Point Remedy Timing Part Name During printing After starting to print, ink is not Head FFC 1. Check that the Head FFC is securely connected to the Main 1.

  • Page 29: Troubleshooting Based On Observed Faults

    L1800 Revision A 2.1.2 Troubleshooting based on Observed Faults This section provides troubleshooting procedures based on observed faults such as print quality troubles and abnormal noise. Table 2-8. Print Quality Troubles Faulty Part/ Observed Faults Details of the Fault Check Point...
  • Page 30 L1800 Revision A Table 2-8. Print Quality Troubles Faulty Part/ Observed Faults Details of the Fault Check Point Remedy Part Name Dot missing and Although inks are ejected from Head FFC 1. Check that the Head FFC is securely connected to the Main 1.
  • Page 31 L1800 Revision A Table 2-8. Print Quality Troubles Faulty Part/ Observed Faults Details of the Fault Check Point Remedy Part Name Dot missing and Although inks are ejected from Ink System Unit 1. Check if the Cleaner Blade is covered with paper dust or is bent. 1. Replace the Ink System Unit with a new one.
  • Page 32 L1800 Revision A Table 2-8. Print Quality Troubles Faulty Part/ Observed Faults Details of the Fault Check Point Remedy Part Name Horizontal or vertical Although inks are ejected from Head FFC 1. Check that the Head FFC is securely connected to the Print Head 1.
  • Page 33 L1800 Revision A Table 2-8. Print Quality Troubles Faulty Part/ Observed Faults Details of the Fault Check Point Remedy Part Name Vertical or horizontal The printout has banding vertical Adjustment 1. For printing in the Bi-D mode, check that the Bi-D Adjustment 1.
  • Page 34 L1800 Revision A Table 2-8. Print Quality Troubles Faulty Part/ Observed Faults Details of the Fault Check Point Remedy Part Name Vertical or horizontal When printing at 360 dpi, Adjustment 1. Check that PF Adjustment has executed properly. 1. Perform PF Adjustment properly.
  • Page 35 L1800 Revision A Table 2-8. Print Quality Troubles Faulty Part/ Observed Faults Details of the Fault Check Point Remedy Part Name The printout is The non-printed side or the Front Paper 1. Check that heaps of ink are not formed on the Front Paper Guide 1.
  • Page 36 L1800 Revision A Table 2-8. Print Quality Troubles Faulty Part/ Observed Faults Details of the Fault Check Point Remedy Part Name The printout is Ink smudges appear on the blank Front and Rear 1. Check the Front and Rear Paper EJ Roller Assys for ink stain.
  • Page 37 L1800 Revision A Table 2-8. Print Quality Troubles Faulty Part/ Observed Faults Details of the Fault Check Point Remedy Part Name The printout is Ink smudges appear on the blank PF Roller Shaft 1. Check the PF Roller Shaft for ink stain.
  • Page 38 L1800 Revision A Table 2-8. Print Quality Troubles Faulty Part/ Observed Faults Details of the Fault Check Point Remedy Part Name Borderless Printing Cannot make a borderless PW sensor 1. Check if the paper dust or scrap of the paper is attached to the 1.

  • Page 39: Disassembly And Assembly

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

  • Page 40: Overview

    L1800 Revision A 3.1 Overview 3.1.1 Precautions Before starting the disassembling/reassembling work of this product, always read the This chapter describes procedures for disassembling and assembling this product. following “WARNING” and “CAUTION” carefully. Unless otherwise specified, the disassembled units or main components can be reassembled by reversing the disassembling procedure.

  • Page 41: Tools

    18) C.B.P. 3x12 Penlight 9) C.B.P. M3x6 19) C.B. M3x4 Strong tape 1032813 10) C.B.S. M3x4 Note : All of the tools listed above are commercially available. EPSON provides the tools listed with EPSON tool code. Disassembly And Assembly Overview Confidential...

  • Page 42: Checks And Precautions Before Disassembling

    Ink Leakage during Operation 3.1.4.1 Factors which Affect the Print Quality Ink may spill when removing the following parts from L1800. This section describes the parts that may cause ink spill and the means to minimize the HOW TO PLACE THE INK TANK ASSY WHEN DISASSEMBLING/ ink spill when removing the parts.
  • Page 43 L1800 Revision A MEANS DO TO MINIMIZE THE INK SPILL DISCHARGING INK FROM THE INK SUPPLY TANK Discharging ink is recommended only when disconnecting the Ink Supply Tank Tube Even observing the points described in this section, ink may spill in C A U T I O N Assy from the Ink Supply Tank.
  • Page 44 L1800 Revision A Close the choke valve, then connect the tube connected with the injector to the  It is recommended that the ink in the Ink Supply Tank should C H E C K Ink Supply Tank Tube. P O I N T...

  • Page 45: Protection For Transportation

    L1800 Revision A 3.1.5 Protection for Transportation  Securing the Ink Tank ± Prepare two pieces of strong tape (length: 90 2 mm, width: 22 mm). Before packing the printer for returning it to the user, secure it at the specified points with strong tape to avoid damaging the printer or ink leakage during transport, and Install the Ink Supply Tank Assy to the printer.

  • Page 46: Locking/Releasing The Carriage

    L1800 Revision A 3.1.6 Locking/Releasing the Carriage  Points to be checked before packing the printer Locking and releasing the Carriage is shown below.  The Valve Lever is on the position  All the caps of the Ink Supply Tank shown below (the Choke Valve is Assy are securely closed.

  • Page 47: Method For Making Adapter Guide Holder Removal Tool

    L1800 Revision A 3.1.7 Method for making Adapter Guide Holder removal tool The Adapter Guide Holder (refer to p.58) can be easily removed by using a special tool. The method for making the tool is described below. Prepare a handle part of a clip, or a similar metal wire piece.

  • Page 48: Disassembly

    L1800 Revision A 3.1.8 Disassembly The flowchart below lists the step-by-step disassembly procedures. When disassembling each unit, refer to the page number shown in the figure. Start  The boxes shown in a dotted-line are not the shortest C H E C K P O I N T procedures, but are necessary to proceed to the next step.
  • Page 49 L1800 Revision A Lower Housing / Ink Supply Tube Ink Supply Tank Ink Supply Tank Adapter section Printer Mechanism Assy section Tube Assy section Assy section (p.101) (p.61) (p.102) (p.104) (p.105) Front Paper Guide Pad ASF Assy (p.71) PF Motor (p.95) Waste Ink Pad (p.79)

  • Page 50: Removing The Housings

    L1800 Revision A 3.2 Removing the Housings 3.2.2 Stacker Assy To disengage the guide pin on the right of the Stacker Assy, push the Stopper in 3.2.1 Paper Support Assy the direction of the arrow with a flathead screwdriver or similar tool.

  • Page 51: Front Decoration Plate Left/Right

    L1800 Revision A 3.2.3 Front Decoration Plate Left/Right 3.2.4 Rear Housing Open the Stacker Assy. Remove the two C.B.P. M3 x 8 screws and the C.B.S. M3 x 6 screw that secure the Rear Housing. While releasing the hook on the Front Decoration Plate Left, open the plate in the direction of the arrow, and remove it.

  • Page 52: Panel Unit

    L1800 Revision A 3.2.5 Panel Unit  Align the positioning tabs (one each on the left/right) with the positioning holes (one each on the left/right) on the Upper Open the Printer Cover. Housing.  Align the positioning tabs (three each on the left/right) with the...
  • Page 53 L1800 Revision A Disengage the nine hooks on the bottom of the Panel Unit, and remove the Panel  Be careful not to get the Panel FFC caught underneath the Unit while pulling out its tab. hooks on the Panel Unit.

  • Page 54: Decoration Plate Left/Right

    L1800 Revision A 3.2.6 Decoration Plate Left/Right Release the three hooks on the front of the Decoration Plate Right and lift the plate a little to release the tab and the four guide pins on the upper side, then remove the Remove the Rear Housing.

  • Page 55: Upper Housing / Printer Cover

    L1800 Revision A 3.2.7 Upper Housing / Printer Cover  When installing the Decoration Plate L/R, first align the hooks of the Decoration Plate L/R (two each) with the ribs of the Remove the Decoration Plate Left/Right. (p.49) Lower Housing (two each on the left/right), and then align the Remove the Panel Unit.
  • Page 56 L1800 Revision A REMOVING THE PRINTER COVER  Route the Panel FFC correctly as shown in Figure 3-21.  Install the Upper Housing so that the Grounding Plate properly Remove the Upper Housing / Printer Cover. (p.50) protrudes through the cutout of the Upper Housing.

  • Page 57: Upper Housing Support Assy

    L1800 Revision A Be careful not to damage the surface in step 3 and later. After replacing the following parts, be sure to apply G-26 grease to the A D J U S T M E N T C A U T I O N R E Q U I R E D area specified for each part.

  • Page 58: Removing The Boards

    L1800 Revision A 3.3 Removing the Boards Disconnect all the cables and FFCs connected on the Main Board from the near side one by one. 3.3.1 Board Assy (Main Board/Power Supply Board) Connector Connector Panel Board CN115 CR Motor Remove the Upper Housing / Printer Cover. (p.50)
  • Page 59 L1800 Revision A REMOVING THE POWER BOARD Confirm that the FFCs do not cross each other first, then connect the FFCs and the cables to the Main Board while paying attention Remove the Board Assy (Main Board/Power Supply Board). (p.53) to the edge of the Shield Plate.

  • Page 60: Disassembling The Printer Mechanism

    L1800 Revision A 3.4 Disassembling the Printer Mechanism  Referring to Figure 3-35, correctly route the APG connector cable. 3.4.1 APG Assy  Apply the acetate tape A according to the standard below. Remove the Upper Housing / Printer Cover. (p.50)

  • Page 61: Cr Scale

    L1800 Revision A 3.4.2 CR Scale  Align the phase of the APG Assy in the following procedure. 1.Align the delta marks of Spur Gear 16 and Combination Gear Remove the Upper Housing / Printer Cover. (p.50) 22, 28.8, 32.4.
  • Page 62 L1800 Revision A Remove the coil section of Torsion Spring 24.7 from the tab on the Left CR Shaft Turn the CR Scale 90º, and remove it from the tab on the Left CR Shaft Mounting Mounting Plate with tweezers.

  • Page 63: Printhead / Adapter Guide Holder

    L1800 Revision A 3.4.3 Printhead / Adapter Guide Holder  Pass the CR Scale through the slot on the CR Encoder.  So as not to damage the FFC, do not use any tools with the C A U T I O N sharp ends when removing the Cable Holder.
  • Page 64 L1800 Revision A Using the special tool (refer to Method for making Adapter Guide Holder removal Lift the Adapter Guide Holder and remove it. tool (p42)), disengage tab A of the Adapter Guide Holder on the right rear side of the Carriage Unit.
  • Page 65 L1800 Revision A Disconnect the two Head FFCs on the back side, and remove the Printhead. Head FFC Figure 3-51. Removing the Printhead (2) Tighten the screws in the order shown in Figure 3-50 After replacing or removing the Printhead, always make the required...

  • Page 66: Lower Housing / Printer Mechanism

    L1800 Revision A 3.4.4 Lower Housing / Printer Mechanism 1) C.B.P. M3x10 (6±1 kgf.cm) Remove the Upper Housing Support Assy. (p.52) Remove the Adapter section. (p.101) Remove the Ink Supply Tube Assy section. (p.102) Printer Mechanism Remove the Ink Supply Tank Tube Assy section. (p.104) Remove the Ink Supply Tank Assy section.
  • Page 67 L1800 Revision A  Install the Printer Mechanism to the Lower Housing as follows.  Insert the Waste Ink Tube with the red line into the Ink Tube. (refer to Figure 3-53) 1. Align the two guide pins with the positioning holes as shown below.

  • Page 68: Carriage Shaft / Carriage Unit

    L1800 Revision A 3.4.5 Carriage Shaft / Carriage Unit Remove the two C.B.S. M3 x 6 screws that secure the Frame Support Plate (Left), and remove it. When only removing the Carriage Shaft, you do not need to C H E C K...
  • Page 69 L1800 Revision A Remove the foot of Left PG Torsion Spring from tab A, and remove the coil Place the feet of Left PG Torsion Spring and Right PG Torsion section from tab B to remove Left PG Torsion Spring from the Main Frame.
  • Page 70 L1800 Revision A Remove the extension spring for the Driven Pulley Holder from the Main Frame 11. Remove the CR Drive Belt from the CR Motor Pinion Gear. and the tab on the Drive Pulley Holder with needle-nose pliers. CR Drive Belt...
  • Page 71 L1800 Revision A 13. Loosen the C.B.S. (P4) M3 x 8 screw that secures the Left Parallelism Adjust 15. Lift the Carriage Shaft upwards, and remove the Carriage Shaft Spacer from the Bushing, and rotate the Bushing toward the front of the Printer Mechanism to Carriage Shaft with tweezers.
  • Page 72 L1800 Revision A 17. Lift the Carriage Shaft within the hole on the Main Frame, and remove the Spacer Install the Right PG Cam so that one of these positions marked “0”, and Left PG Cam from the Carriage Shaft.
  • Page 73 L1800 Revision A When performing the following procedure, take care not to scratch  Set the longer end of the Carriage Shaft to the left side. C A U T I O N the Carriage Shaft.  When the Carriage Shaft is removed, the Plain spring and Leaf spring that are attached to the right end of the Carriage Shaft may drop off.
  • Page 74 L1800 Revision A 21. Insert the flathead screwdriver and such to the two holes of the Carriage Unit, and 22. Turn the Belt Holder Mounting Plate in the direction of the arrow, and remove it release the two tabs of the Ink Guide from the two hooks of the Carriage Unit, and from the Carriage Unit.
  • Page 75 L1800 Revision A 24. Release the CR Encoder Board Holder from the three Tabs to remove it from the 25. Disconnect the Sensor FFC from the connector on the CR Encoder Board, pull out Carriage Unit. the Sensor FFC from the Carriage Unit, and remove the Carriage Unit.

  • Page 76: Asf Assy

    L1800 Revision A 3.4.6 ASF Assy Disconnect all the cables and the FFCs from the connectors on the Relay Board.  CN1 : Relay FFC Remove the Upper Housing Support Assy. (p.52)  CN2 : PE Sensor cable Remove the C.B.S. M3 x 8 screw that secures the Earth cables on the right rear ...
  • Page 77 L1800 Revision A Remove the two C.B. M3 x 6 screws that secure the two Guide Roller LDs.  Referring to Figure 3-83, correctly route each of the cables and 10. Gently pull the LD Roller Shaft to the rear of the printer, and remove the Guide FFCs.
  • Page 78 L1800 Revision A 11. Remove the three C.B.S. (P4) M3 x 8 screws that secure the ASF Assy, and  Align the guide pin and four Tabs on the ASF Assy with the remove the ASF Assy from the Printer Mechanism.

  • Page 79: Ld Roller

    L1800 Revision A 3.4.7 LD Roller After replacing or removing the ASF Assy, always make the required A D J U S T M E N T R E Q U I R E D adjustments referring to the following.
  • Page 80 L1800 Revision A Release the two tabs that secure the ASF Sensor Flag from the inside of the ASF While bending the LD Roller Shaft slightly, detach it from the shaft hole on the Assy, and remove the ASF Sensor Flag from the LD Roller Shaft.

  • Page 81: Retard Roller Assy

    L1800 Revision A 3.4.8 Retard Roller Assy  Make sure to install the LD Roller with the triangular groove marked inside as shown below. When replacing the Retard Roller Assy, replace the LD Roller C H E C K P O I N T together with the Retard Roller Assy.
  • Page 82 L1800 Revision A Detach the extension spring from the tab of the Retard Roller Assy, and remove  See below for installing the torsion spring of the Paper Back the Retard Roller Assy from the ASF Assy. Lever Right. Inside...

  • Page 83: Front Paper Guide Pad

    L1800 Revision A 3.4.9 Front Paper Guide Pad After installing the Front Paper Guide Pads, lift the Printer Mechanism, and check the following points. Remove the Printer Mechanism. (Refer to 3.4.4 Lower Housing / Printer Make sure that the tabs on the Pads are not cut midway.

  • Page 84: Waste Ink Pad

    L1800 Revision A 3.4.10 Waste Ink Pad  Route the Waste Ink Tube as shown below. Remove the Printer Mechanism. (Refer to 3.4.4 Lower Housing / Printer Mechanism (p.61).) Waste Ink Tubes Remove the C.B.P. 3x8 screw that secures the Waste Ink Tube.

  • Page 85: Foot

    L1800 Revision A 3.4.11 Foot 3.4.12 Paper EJ Frame Assy Remove the Printer Mechanism. (Refer to 3.4.4 Lower Housing / Printer Remove the Upper Housing Support Assy. (p.52) Mechanism (p.61).) Remove the Ink Supply Tube Assy section. (p.102) Remove the six foot at the backside of the Lower Housing.
  • Page 86 L1800 Revision A When performing the following procedure, take care not to scratch  Hook both rear ends of the Paper EJ Frame Assy onto the tabs C A U T I O N the Star Wheel. on the Main Frame.

  • Page 87: Ink System Unit

    L1800 Revision A 3.4.13 Ink System Unit Remove the two C.B.S. M3 x 4 screws that secure the Ink System Guide Plate, and remove it. Remove the ASF Assy. (p.71) Remove the Paper EJ Frame Assy. (p.80) Remove the Lower Housing / Printer Mechanism. (p.61) Acetate tape Release the Carriage Lock, and move the Carriage Unit to the center.
  • Page 88 L1800 Revision A Remove the two C.B.S. M3 x 6 screws that secure the Ink System Unit. 10. Remove the two C.B.S. 3x6 screws that secure the Right Support Frame, and remove the Right Support Frame from the Main Frame.
  • Page 89 L1800 Revision A 11. Remove the Ink System Unit downwards from the Main Frame. Align the positioning two holes on the Main Frame with the two guide pins on the Ink System Unit. Ink System Unit Main Frame Positioning holes Figure 3-115.

  • Page 90: Front Paper Guide / Paper Ej Roller

    L1800 Revision A 3.4.14 Front Paper Guide / Paper EJ Roller Remove the Spacer from the EJ Roller Shaft. Remove the guide pins on Left Bushing 8 from the Main Frame using tweezers, Remove the Paper EJ Frame Assy. (p.80) and turn Left Bushing 8 toward you to align with the notches on the Main Frame.
  • Page 91 L1800 Revision A Return the Carriage Unit to its home position. 11. Pull out the Shaft of the Left Front Frame from the bushing of the Front Paper Guide and remove the Left Front Frame. Remove the C.B.S. M3 x 6 screw that secure the Left Front Frame.
  • Page 92 L1800 Revision A  Align the positioning holes on the Main Frame with the guide After replacing the following parts, be sure to apply G-45 grease to the A D J U S T M E N T R E Q U I R E D pins on the Front Paper Guide.

  • Page 93: Pf Roller Shaft

    L1800 Revision A 3.4.15 PF Roller Shaft Remove the PG Grounding Spring from the notch on the Main Frame, and remove the PF Grounding Spring from the groove on the PF Roller Shaft. Remove the Front Paper Guide / Paper EJ Roller. (p.85) Remove the PF Encoder.
  • Page 94 L1800 Revision A Remove the guide pin of Left Bushing 8 from the Main Frame using tweezers, and When performing the following procedure, pay attention to the C A U T I O N rotate the Bushing upwards to align with the notch on the Main Frame.

  • Page 95: Release Holder Assy

    L1800 Revision A 3.4.16 Release Holder Assy Be careful not to move Compression Spring 4 and the Leaf Spring C A U T I O N on the left side of the PF Roller Shaft to the coated section on the Remove the Lower Housing / Printer Mechanism.

  • Page 96: Upper Paper Guide Assys

    L1800 Revision A 3.4.17 Upper Paper Guide Assys  Align the three upper tabs on the Release Holder Assy with the positioning holes on the Main Frame. See Figure 3-134 (p.90) Remove the Release Holder Assy. (p.90)  Tighten the screws in the order shown in Figure 3-134 Remove the PE Sensor Holder.
  • Page 97 L1800 Revision A Remove the six Upper Paper Guide Torsion Springs from the tabs on the Main Make sure that the leading end of the Upper Paper Guide Torsion Frame, and pull out the Upper Paper Guide Torsion Springs from the six Upper Spring can be seen through the hole of the Upper Paper Guide Assy.

  • Page 98: Removing The Motors

    L1800 Revision A 3.5 Removing the Motors  Attach two pieces of acetate tape (18 mm) on the Upper Shield Plate. 3.5.1 CR Motor Acetate tape (18mm) Remove the ASF Assy. (p.71) Acetate tape (18mm) Release the Carriage Lock, and move the Carriage Unit to the center.
  • Page 99 L1800 Revision A .Press the Driven Pulley toward the center to loosen the CR Drive Belt, and  Make the Lot No. printed surface on the CR Motor face the remove the CR Drive Belt from the CR Motor Pinion Gear.

  • Page 100: Pf Motor

    L1800 Revision A 3.5.2 PF Motor  Make the slit on the PF Motor face the direction shown in the A D J U S T M E N T R E Q U I R E D figure below.

  • Page 101: Asf Motor

    L1800 Revision A 3.5.3 ASF Motor  Attach a piece of acetate tape (60 mm) on the ASF Motor Cable as shown below. Remove the Upper Housing / Printer Cover. (p.50) Remove the Earth cable. (refer to 3.4.6 ASF Assy Step2 (p71) .)

  • Page 102: Removing The Sensors

    L1800 Revision A 3.6 Removing the Sensors 3.6.2 PF Encoder Remove the Upper Housing / Printer Cover. (p.50) 3.6.1 CR Encoder Disconnect the FFC from the PF Encoder Sensor Board. Remove the Carriage Shaft / Carriage Unit. (p.63) Remove the C.B.S. M3 x 8 screw that secures the PF Encoder Sensor Holder.

  • Page 103: Pw Sensor

    L1800 Revision A 3.6.3 PW Sensor While pressing the guide pin on the PF Encoder Sensor Holder using tweezers, slide the holder upwards to release the three tabs, and remove the PF Encoder Remove the Carriage Shaft / Carriage Unit. (p.63) Sensor Holder.

  • Page 104: Pe Sensor Holder

    L1800 Revision A 3.6.4 PE Sensor Holder Make sure that the PW Sensor FFC is routed as shown in Figure 3-154 Remove the Lower Housing / Printer Mechanism. (p.61) Remove the ASF Assy. (p.71) Remove the PE Sensor connector cable from the five tabs on the Release Holder Assy and the two tabs on the Head Cable Cover.
  • Page 105 L1800 Revision A Align the four tabs and guide pin on the PE Sensor Holder with the positioning holes on the Main Frame correctly so that there is no gap between the PE Sensor Holder and the Main Frame. Tabs...

  • Page 106: Disassembling The Ciss Section

    L1800 Revision A 3.7 Disassembling the CISS section 3.7.1.2 Adapter 3.7.1 Adapter section Hook Adapter 3.7.1.1 Adapter Cover Film Timing Belt Carriage Unit Connection of Ink Supply Tubes Ink Supply Tube Assy Adapter Cover Dowel and Hole Hook Adapter Ink Supply Tube CBP.

  • Page 107: Ink Supply Tube Assy Section

    L1800 Revision A 3.7.2 Ink Supply Tube Assy section 3.7.2.2 Tube Guide Sheet (w/Tube Guide Sheet sub) 3.7.2.1 Tube Guide Sheet/Tube Guide Sheet Sub Step 1 Carriage Unit Tube Guide Sheet Hole 1 Hole 2 Tube Guide Sheet Sub Section A...

  • Page 108: Ink Supply Tube Assy

    L1800 Revision A 3.7.2.3 Ink Supply Tube Assy Ink Supply Tube Assy Ink Supply Tube Assy Carriage Unit Joint Ink Supply Tube Adapter Assy side Joint side 352.5 ± 1 95 ± 1 67.5 ± 1 Yellow Black Light Cyan...

  • Page 109: Ink Supply Tank Tube Assy Section

    L1800 Revision A 3.7.3 Ink Supply Tank Tube Assy section 3.7.3.1 Ink Supply Tank Tube Assy Valve Case Tube Clamp Joint Arch Bottom Tube Holder 179 ± 1 mm 278 ± 1 mm Hole Yellow 453 ± 3 mm Black 424 ±...

  • Page 110: Joint

    L1800 Revision A 3.7.4 Ink Supply Tank Assy section 3.7.3.2 Joint 3.7.4.1 Valve Position Label Ink Supply Tube Joint Cutout 0.5 mm or less Joint Valve Position Label 7.5 mm 7.5 mm 0.5 mm or less Ink Supply Tank Tube...

  • Page 111: Top Cover

    L1800 Revision A 3.7.4.2 Top Cover 3.7.4.3 Tube Valve Holder Front/Rear Refilling Ink Label Ink Supply Tank Tube Refilling Ink Label 13 ± 1 mm Tube Valve Holder Rear Valve Case 6 ± 1 mm Tube Valve Holder Front Tube Valve Holder Rear...

  • Page 112: Valve Lever

    L1800 Revision A 3.7.4.4 Valve Lever 3.7.4.5 Ink Supply Tank Assy Ink Supply Tank Tube Valve Holder Rear Ink Supply Tank Assy Flathead precision screwdriver Film Valve Lever Right Cover Hook Follow the procedure below when removing the Valve Lever.

  • Page 113: Bottom Cover/Left Cover/Right Cover/Cover Joint

    L1800 Revision A 3.7.4.6 Bottom Cover/Left Cover/Right Cover/Cover Joint Left Cover Cover Joint Ink Supply Tank Assy Right Cover Bottom Cover Hook C.B.P. 3X6 (4±1 kgf.cm) Be careful about how to place the Ink Supply Tank Assy in order to prevent printing failure from occurring. (See “How to place the Ink Tank Assy when disassembling/reassembling”...
  • Page 114 C H A P T E R ADJUSTMENT Confidential...

  • Page 115: Adjustment Items And Overview

    L1800 Revision A 4.1 Adjustment Items and Overview This chapter describes adjustments to be made after the disassembly/reassembly of this product. 4.1.1 Servicing Adjustment Item List The items, purposes and outlines of the Adjustment Program are given in the following table.
  • Page 116 L1800 Revision A Table 4-1. Adjustment Items Adjustment Purpose Method Outline Initialize PF The deterioration amount of the PF Roller Shaft is reflected to 1. Select and execute this function in the Adjustment Program. deterioration offset the paper feed correction amount. Every time a sheet of paper is 2.
  • Page 117 L1800 Revision A Table 4-1. Adjustment Items Adjustment Purpose Method Outline CR motor heat protection When replacing the Printer Mechanism, this adjustment is made 1. Select this function in the Adjustment Program. control to measure the load of Carriage sliding, and manufacturing 2.
  • Page 118 L1800 Revision A Table 4-3. Additional Functions Function Item Purpose Method Outline Final check pattern print A4 size Use this to check if the all adjustments have been properly The all adjustment patterns are printed automatically. made. US Letter size EEPROM dump Use this to read out the EEPROM data for analysis.

  • Page 119: Required Adjustments

    L1800 Revision A 4.1.2 Required Adjustments The table below lists the required adjustments depending upon the parts being repaired or replaced. Find the part(s) you removed or replaced, and check which adjustment(s) must be carried out. Table 4-4. Required Adjustment List...
  • Page 120 L1800 Revision A Table 4-4. Required Adjustment List Priority Adjustment Item Part Name Waste Ink Pad/ Remove Front Paper Guide Replace Remove Carriage shaft Replace Remove Carriage Unit Replace Remove Paper EJ Frame Assy Replace Remove Printer Mechanism Replace Remove...

  • Page 121: Required Adjustment Tools

    L1800 Revision A 4.1.3 Required Adjustment Tools Table 4-5. List of Tools Name Part Code Category Overview The following table lists the adjustment tools required for adjustment of this product. Level Block Used to check whether or not 1304994 Adjusting Table 4-5.

  • Page 122: Adjustment Using Adjustment Program

    L1800 Revision A 4.2 Adjustment Using Adjustment Program Additional information In the following cases, reassemble or replace the Printhead and carry out the This section explains the adjustments using the Adjustment Program. adjustment again. 4.2.1 Head angular adjustment  The difference between the adjusted values of 1 -> 80 and 80 -> 1 exceeds 8.

  • Page 123: Pw Adjustment/First Dot Position Adjustment

    L1800 Revision A 4.2.2 PW Adjustment/First Dot Position Adjustment  PW Adjustment How to Judge Patterns are printed as shown below. Enter the value of the line located 5mm away from each edge. Example: In the left figure, enter “0” (top), “5” (bottom), “-3” (left) and “0” (right).

  • Page 124: Bi-D Adjustment

    L1800 Revision A 4.2.3 Bi-D adjustment The pattern shown below is printed for each of the PG settings. Figure 4-3. Bi-D Adjustment Printout Pattern How to Judge Examine the printout patterns for each of the five modes, and enter the value for the pattern with no gap and overlap for each mode.

  • Page 125: Band Printing Adjustment

    L1800 Revision A 4.2.4 BAND printing adjustment  Bi-d band adjustment How to Judge The following pattern is printed on two sheets each for Bi-d band adjustment and Pass offset adjustment with two dot sizes (ECO, VSD1). Examine the printout patterns and enter the values of the most straight lines.

  • Page 126: Pf Adjustment

    L1800 Revision A 4.2.5 PF adjustment  PF- for bottom margin area The following pattern is printed.  PF- for standard print area How to Judge The following pattern is printed. Examine the printout patterns, and enter the value for the pattern with no overlap and gap between the upper and lower ones.

  • Page 127: Pf Band Adjustment

    L1800 Revision A 4.2.6 PF band adjustment 4.3 Adjustment without Using Adjustment Program The following pattern is printed. This section explains the adjustments that do not use the Adjustment Program. 4.3.1 PF Belt Tension Adjustment When either of the following parts has been removed or replaced, this adjustment must be performed to reduce load on the PF Motor and to secure paper feed accuracy.

  • Page 128: Pf Belt Tension Adjustment Method

    L1800 Revision A 4.3.1.1 PF Belt Tension Adjustment Method As the Drive Belt is flipped with the tip of tweezers in the following C A U T I O N steps, carefully choose the flipping position so that the Belt will not...

  • Page 129: Pg Adjustment

    C H E C K around the Print Head. Remaining drops of ink will stick to the adjustment method for L1800 is the same as the one for Stylus P O I N T continuity measurement portion of the Adjustment Gauge, and Photo R1800.
  • Page 130 L1800 Revision A Load Adapter of all colors into the Carriage Unit. With its conductor connection portion up, set the Adjustment Gauge in the specified position (on the left side of the Front Paper Guide). Loosen the screw that secures the Parallelism Adjust Bushing.
  • Page 131 L1800 Revision A To set the PG position to the “--” position, turn the PG Cam on the right end of the The following figure shows the states of the Adjust Parallel Bushing C H E C K Carriage Shaft clockwise so that the point marked “--” faces down.

  • Page 132: Pf Roller Shaft Center Support Position Adjustment

    L1800 Revision A 4.3.3 PF Roller Shaft Center Support Position 12. Move the Carriage Unit onto the Adjustment Gauge.  Moving position Adjustment Align the right end of the Gauge with the right end of the Carriage Unit. This adjustment must be performed to compensate the deflection amount on the PF Roller Shaft and to maintain an appropriate paper feed amount when the following parts are removed and replaced.

  • Page 133: How To Adjust The Pf Roller Shaft Center Support Position

    L1800 Revision A 4.3.4 How to Adjust the PF Roller Shaft Center Tilt the Printer Mechanism at about 45 degrees, and loosen the screws that secure the Center Support Bushing Cam and the Center Support Bush. Support Position Before performing this adjustment, remove the following parts: Bottom of Rear Center ...
  • Page 134 L1800 Revision A Turn the Center Support Bushing Cam so that the long hand position is +30 from Check for any dirt on the PF Roller Shaft when performing the C A U T I O N the “0” adjustment position.
  • Page 135 L1800 Revision A Unevenness Figure 4-24. Outside the Specified Value Range Figure 4-25. Inside the Specified Value Range Adjustment Adjustment without Using Adjustment Program Confidential...

  • Page 136: Asf Guide Roller Lds Position Adjustment

    L1800 Revision A 4.3.5 ASF Guide Roller LDs Position Adjustment Turn Combination Gear 29.11 on the right side of the ASF Assy CCW to raise the Hopper to the upper limit position (until the Hopper Pad contacts the LD Roller).
  • Page 137 L1800 Revision A Light the printer's inside through a gap between the Roll Paper Frame and the ASF Align the guide pin and tab on the 0 Digit Side Guide Roller LD with the Assy with a penlight, and look the tab on the Retard Roller Holder at the back of positioning holes on the Main Frame, and tighten the Guide Roller LD (0 Digit the two reference tabs on the ASF Assy through the notch.
  • Page 138 C H A P T E R MAINTENANCE Confidential...

  • Page 139: Overview

    L1800 Revision A 5.1 Overview 5.1.2 Service Maintenance If print irregularity (missing dot, white line, etc.) has occurred or the printer indicates This section provides information to maintain the printer in its optimum condition. “Maintenance Error”, take the following actions to clear the error.

  • Page 140: Maintenance Request

    L1800 Revision A 5.1.2.2 Maintenance Request  Waste Ink Pads to be replaced When the ink is used for the Print Head cleaning and such, it is drained via the Cap Table 5-1. List of Waste Ink Pads to be replaced Unit to the Waste Ink Pad located on the Lower Housing.

  • Page 141: Lubrication

    The lubrication used for the components of the printer has been decided on based on Bushings (outer circumference) evaluation carried out by Epson. Therefore, the specified amount and places of <Lubrication Type> lubrication given in this section should be strictly observed.
  • Page 142 L1800 Revision A <Lubrication Point> <Lubrication Point> Right PG Torsion Spring Contact point of the Main Frame and Contact point of the Left and Right PG the CR the Scale Mounting Plate Torsion Springs and the Carriage (Left/Right) Shaft. <Lubrication Type>...
  • Page 143 L1800 Revision A <Lubrication Point> <Lubrication Point> Right Side The Driven Pulley Holder The bushing of the Front Paper Guide Front Paper Guide <Lubrication Type> <Lubrication Type> G-26 G-45 <Lubrication Amount> <Lubrication Amount>  1mm x 2mm x 4 points 1.
  • Page 144 L1800 Revision A <Lubrication Point> <Lubrication Point> Upper surface Lower surface PF Grounding Spring Rear Paper Guide 1. Contact point of the Rear Paper Contact point of the Printer Cover Guide and the PF Roller Holder (Left/Right) and the Printer Cover 2.
  • Page 145 L1800 Revision A <Lubrication Point> <Lubrication Point> Right Side Left Side Contact point of the Shaft of the ASF Contact point of the Housing Upper Shaft of the ASF Frame Frame and the Combination Gear and the Printer Cover 29.11 <Lubrication Type>...

  • Page 146: Lubrication Of Carriage Shaft

    L1800 Revision A 5.1.3.1 Lubrication of Carriage Shaft Hold the Carriage Unit, and while turning the Carriage Shaft clockwise and counterclockwise, move the Carriage Unit to spread the grease evenly. Fit the Carriage Unit onto the Carriage Shaft, and move it to the center of the Shaft.
  • Page 147 L1800 Revision A Hold the Carriage Unit, and while turning the Carriage Shaft, move the Carriage Hold the Carriage Unit, and while turning the Carriage Shaft, move the Carriage Unit to the left end of the Carriage Shaft to lubricate the grease evenly.
  • Page 148 C H A P T E R APPENDIX Confidential...

  • Page 149: Connector Summary

    L1800 Revision A 6.1 Connector Summary This section shows the connections between the main components of the printer. CA86 PSB (Power Supply Board) Control Panel CA53MAIN (CD81 Panel Board) (Main Board) Table 6-1. Connection of the Major Components Appendix Connector Summary...

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