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Epson L1800 Service Manual

SERVICE MANUAL
Color Inkjet Printer
L1800
Confidential
SEIJ13-007
Notice:
All rights reserved. No part of this manual may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical,
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.
The above not withstanding SEIKO EPSON CORPORATION can assume no responsibility for any errors in this manual or the consequences thereof.
EPSON is a registered trademark of SEIKO EPSON CORPORATION.
General Notice: Other product names used herein are for identification purpose only and may be trademarks or registered trademarks of their
respective owners. EPSON disclaims any and all rights in those marks.
Copyright © 2014 SEIKO EPSON CORPORATION.
Printer CS Quality Assurance Department
Confidential
PRECAUTIONS
Precautionary notations throughout the text are categorized relative to 1)Personal injury and 2) damage to equipment.
DANGER Signals a precaution which, if ignored, could result in serious or fatal personal injury. Great caution should be exercised in performing procedures preceded by
DANGER Headings.
WARNING Signals a precaution which, if ignored, could result in damage to equipment.
The precautionary measures itemized below should always be observed when performing repair/maintenance procedures.
DANGER
1. ALWAYS DISCONNECT THE PRODUCT FROM THE POWER SOURCE AND PERIPHERAL DEVICES PERFORMING ANY MAINTENANCE OR REPAIR PROCEDURES.
2. NO WORK SHOULD BE PERFORMED ON THE UNIT BY PERSONS UNFAMILIAR WITH BASIC SAFETY MEASURES AS DICTATED FOR ALL ELECTRONICS TECHNICIANS IN THEIR LINE OF WORK.
3. WHEN PERFORMING TESTING AS DICTATED WITHIN THIS MANUAL, DO NOT CONNECT THE UNIT TO A POWER SOURCE UNTIL INSTRUCTED TO DO SO. WHEN THE POWER SUPPLY CABLE MUST BE CONNECTED, USE EXTREME CAUTION IN WORKING ON POWER SUPPLY AND OTHER ELECTRONIC COMPONENTS.
4. WHEN DISASSEMBLING OR ASSEMBLING A PRODUCT, MAKE SURE TO WEAR GLOVES TO AVOID INJURIER FROM METAL PARTS WITH SHARP EDGES.
WARNING
1. REPAIRS ON EPSON PRODUCT SHOULD BE PERFORMED ONLY BY AN EPSON CERTIFIED REPAIR TECHNICIAN.
2. MAKE CERTAIN THAT THE SOURCE VOLTAGES IS THE SAME AS THE RATED VOLTAGE, LISTED ON THE SERIAL NUMBER/RATING PLATE. IF THE EPSON PRODUCT HAS A PRIMARY AC RATING DIFFERENT FROM AVAILABLE POWER SOURCE, DO NOT CONNECT IT TO THE POWER SOURCE.
3. ALWAYS VERIFY THAT THE EPSON PRODUCT HAS BEEN DISCONNECTED FROM THE POWER SOURCE BEFORE REMOVING OR REPLACING PRINTED CIRCUIT BOARDS AND/OR INDIVIDUAL CHIPS.
4. IN ORDER TO PROTECT SENSITIVE MICROPROCESSORS AND CIRCUITRY, USE STATIC DISCHARGE EQUIPMENT, SUCH AS ANTI-STATIC WRIST STRAPS, WHEN ACCESSING INTERNAL COMPONENTS.
5. REPLACE MALFUNCTIONING COMPONENTS ONLY WITH THOSE COMPONENTS BY THE MANUFACTURE; INTRODUCTION OF SECOND-SOURCE ICs OR OTHER NON-APPROVED COMPONENTS MAY DAMAGE THE PRODUCT AND VOID ANY APPLICABLE EPSON WARRANTY.
6. WHEN USING COMPRESSED AIR PRODUCTS; SUCH AS AIR DUSTER, FOR CLEANING DURING REPAIR AND MAINTENANCE, THE USE OF SUCH PRODUCTS CONTAINING FLAMMABLE GAS IS PROHIBITED.
Confidential
About This Manual
This manual describes basic functions, theory of electrical and mechanical operations, maintenance and repair procedures of the printer. The instructions and procedures included herein are intended for the experienced repair technicians, and attention should be given to the precautions on the preceding page.
Manual Configuration
This manual consists of six chapters and Appendix.
CHAPTER 1.PRODUCT DESCRIPTIONS
Provides a general overview and specifications of the product.
CHAPTER 2.TROUBLESHOOTING
Describes the step-by-step procedures for the troubleshooting.
CHAPTER 3.DISASSEMBLY / ASSEMBLY
Describes the step-by-step procedures for disassembling and assembling the product.
CHAPTER 4.ADJUSTMENT
Provides Epson-approved methods for adjustment.
CHAPTER 5.MAINTENANCE
Provides preventive maintenance procedures and the lists of Epson­approved lubricants and adhesives required for servicing the product.
APPENDIX Provides the following additional information for reference:
• Connector Summary
Symbols Used in this Manual
Various symbols are used throughout this manual either to provide additional information on a specific topic or to warn of possible danger present during a procedure or an action. Be aware of all symbols when they are used, and always read NOTE, CAUTION, or WARNING messages.
Indicates an operating or maintenance procedure, practice or condition that is necessary to keep the product’s quality.
Indicates an operating or maintenance procedure, practice, or condition that, if not strictly observed, could result in damage to, or destruction of, equipment.
May indicate an operating or maintenance procedure, practice or condition that is necessary to accomplish a task efficiently. It may also provide additional information that is related to a specific subject, or comment on the results achieved through a previous action.
Indicates an operating or maintenance procedure, practice or condition that, if not strictly observed, could result in injury or loss of life.
Indicates that a particular task must be carried out according to a certain standard after disassembly and before re-assembly, otherwise the quality of the components in question may be adversely affected.
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Revision Status
Revision Date of Issue Description
A February 10, 2014 First Release
Confidential
L1800 Revision A
CONTENTS
Chapter 1 Product Description
1.1 Operation Buttons & Indicators (LEDs)................................................................ 4
1.1.1 Operation Buttons ........................................................................................ 4
1.1.2 Indicators (LEDs) ........................................................................................ 4
1.1.3 Operation Buttons & LEDs Functions ........................................................ 4
1.1.4 Errors & Remedies ...................................................................................... 6
Chapter 2 Troubleshooting
2.1 Overview ............................................................................................................... 8
2.1.1 Troubleshooting according to Error Messages ............................................ 8
2.1.2 Troubleshooting based on Observed Faults .............................................. 24
Chapter 3 Disassembly And Assembly
3.1 Overview ............................................................................................................. 35
3.1.1 Precautions ................................................................................................ 35
3.1.2 Tools .......................................................................................................... 36
3.1.3 Screws ........................................................................................................ 36
3.1.4 Checks and Precautions before Disassembling ......................................... 37
3.1.4.1 Factors which Affect the Print Quality .............................................. 37
3.1.4.2 Factors which Affect the Safety of Service Personnel such as
Ink Leakage during Operation ........................................................... 37
3.1.5 Protection for Transportation .................................................................... 40
3.1.6 Locking/Releasing the Carriage ................................................................ 41
3.1.7 Method for making Adapter Guide Holder removal tool .......................... 42
3.1.8 Disassembly ............................................................................................... 43
3.2 Removing the Housings ...................................................................................... 45
3.2.1 Paper Support Assy ................................................................................... 45
3.2.2 Stacker Assy .............................................................................................. 45
3.2.3 Front Decoration Plate Left/Right ............................................................. 46
3.2.4 Rear Housing ............................................................................................. 46
3.2.5 Panel Unit .................................................................................................. 47
3.2.6 Decoration Plate Left/Right ....................................................................... 49
3.2.7 Upper Housing / Printer Cover .................................................................. 50
3.2.8 Upper Housing Support Assy .................................................................... 52
3.3 Removing the Boards .......................................................................................... 53
3.3.1 Board Assy (Main Board/Power Supply Board) ....................................... 53
3.4 Disassembling the Printer Mechanism................................................................ 55
3.4.1 APG Assy .................................................................................................. 55
3.4.2 CR Scale .................................................................................................... 56
3.4.3 Printhead / Adapter Guide Holder ............................................................. 58
3.4.4 Lower Housing / Printer Mechanism ........................................................ 61
3.4.5 Carriage Shaft / Carriage Unit ................................................................... 63
3.4.6 ASF Assy ................................................................................................... 71
3.4.7 LD Roller ................................................................................................... 74
3.4.8 Retard Roller Assy .................................................................................... 76
3.4.9 Front Paper Guide Pad .............................................................................. 78
3.4.10 Waste Ink Pad .......................................................................................... 79
3.4.11 Foot .......................................................................................................... 80
3.4.12 Paper EJ Frame Assy ............................................................................... 80
3.4.13 Ink System Unit ....................................................................................... 82
3.4.14 Front Paper Guide / Paper EJ Roller ....................................................... 85
3.4.15 PF Roller Shaft ........................................................................................ 88
3.4.16 Release Holder Assy ............................................................................... 90
3.4.17 Upper Paper Guide Assys ........................................................................ 91
3.5 Removing the Motors.......................................................................................... 93
3.5.1 CR Motor ................................................................................................... 93
3.5.2 PF Motor .................................................................................................... 95
3.5.3 ASF Motor ................................................................................................. 96
3.6 Removing the Sensors......................................................................................... 97
3.6.1 CR Encoder ............................................................................................... 97
3.6.2 PF Encoder ................................................................................................ 97
3.6.3 PW Sensor ................................................................................................. 98
3.6.4 PE Sensor Holder ...................................................................................... 99
3.7 Disassembling the CISS section........................................................................ 101
3.7.1 Adapter section ........................................................................................ 101
3.7.1.1 Adapter Cover ................................................................................. 101
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1
L1800 Revision A
3.7.1.2 Adapter ............................................................................................ 101
3.7.2 Ink Supply Tube Assy section ................................................................. 102
3.7.2.1 Tube Guide Sheet/Tube Guide Sheet Sub ....................................... 102
3.7.2.2 Tube Guide Sheet (w/Tube Guide Sheet sub) ................................. 102
3.7.2.3 Ink Supply Tube Assy ..................................................................... 103
3.7.3 Ink Supply Tank Tube Assy section ........................................................ 104
3.7.3.1 Ink Supply Tank Tube Assy ............................................................ 104
3.7.3.2 Joint ................................................................................................. 105
3.7.4 Ink Supply Tank Assy section ................................................................. 105
3.7.4.1 Valve Position Label ....................................................................... 105
3.7.4.2 Top Cover ........................................................................................ 106
3.7.4.3 Tube Valve Holder Front/Rear ........................................................ 106
3.7.4.4 Valve Lever ..................................................................................... 107
3.7.4.5 Ink Supply Tank Assy ..................................................................... 107
3.7.4.6 Bottom Cover/Left Cover/Right Cover/Cover Joint ....................... 108
Chapter 4 Adjustment
4.1 Adjustment Items and Overview....................................................................... 110
4.1.1 Servicing Adjustment Item List ............................................................... 110
4.1.2 Required Adjustments ............................................................................. 114
4.1.3 Required Adjustment Tools ..................................................................... 116
4.2 Adjustment Using Adjustment Program ........................................................... 117
4.2.1 Head angular adjustment ......................................................................... 117
4.2.2 PW Adjustment/First Dot Position Adjustment ...................................... 118
4.2.3 Bi-D adjustment ....................................................................................... 119
4.2.4 BAND printing adjustment ...................................................................... 120
4.2.5 PF adjustment .......................................................................................... 121
4.2.6 PF band adjustment ................................................................................. 122
4.3 Adjustment without Using Adjustment Program .............................................. 122
4.3.1 PF Belt Tension Adjustment ................................................................... 122
4.3.1.1 PF Belt Tension Adjustment Method .............................................. 123
4.3.2 PG Adjustment ........................................................................................ 124
4.3.2.1 PG Adjustment Method ................................................................... 124
4.3.3 PF Roller Shaft Center Support Position Adjustment ............................. 127
4.3.4 How to Adjust the PF Roller Shaft Center
Support Position ............................................................................................... 128
4.3.5 ASF Guide Roller LDs Position Adjustment .......................................... 131
4.3.5.1 Adjusting the Position of the ASF Guide Roller LDs ..................... 131
Chapter 5 Maintenance
5.1 Overview ........................................................................................................... 134
5.1.1 Cleaning ................................................................................................... 134
5.1.2 Service Maintenance ............................................................................... 134
5.1.2.1 Head Cleaning ................................................................................. 134
5.1.2.2 Maintenance Request ...................................................................... 135
5.1.3 Lubrication .............................................................................................. 136
5.1.3.1 Lubrication of Carriage Shaft .......................................................... 141
Chapter 6 Appendix
6.1 Connector Summary.......................................................................................... 144
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2

PRODUCT DESCRIPTION

CHAPTER
1
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L1800 Revision A
Power Button Ink ButtonPaper Button
Power LED Ink LEDPaper LED
Cancel Button

1.1 Operation Buttons & Indicators (LEDs)

1.1.1 Operation Buttons

The printer has the following four operation buttons.
Table 1-1. Operation Buttons
Button Function
Power Turn the power of this unit on/off.
Paper
Ink Start Initial Ink Charge or Head cleaning.
Cancel In motion:Cancels the job execution / Release error

1.1.2 Indicators (LEDs)

Three indicators (LEDs) are provided to indicate settings or printer status.
LED Function
Power LED (green) Indicates power on/off.
Paper LED (red) Indicates paper error.
Ink LED (red) Light when the maintenance error occurring.
In motion:Release error In Idle: Load and Eject paper
Table 1-2. Indicators (LEDs)

1.1.3 Operation Buttons & LEDs Functions

Detailed information on the buttons and LEDs functions are listed below.
Table 1-3. Operation Button Functions
Button
Power
Paper On
Ink (Press 3 seconds or more)
Cancel On
Paper + Power On
Printer
Status
Off
On
On
Function
Turns the power on.
Turns the power off.
When the condition is Idle, Loads and Ejects the
paper.
When the following condition, loads the paper by
pressing this key. Release the error display and continue the procedure if the paper loading is success.
•Paper Out Error
• Multiple Feed Error
• Ink waste pad near end error
When the following condition, ejects the paper by　
pressing this key. Release the error display and　 continue the procedure if the paper ejecting is　 success.
• Paper jam error
Runs a head cleaning.Runs a Initial Ink Charge.
Stop printing, and cancel the job of print.When the error occurs, it cancels error release &
stops printing and ejects the paper if it exists.
Print nozzle check pattern after normal Initializing
procedure is done.
If initial ink fill is not done, execute only initial ink
fill. Printer does not print nozzle check pattern.
Figure 1-1. Buttons & LEDs
Product Description Operation Buttons & Indicators (LEDs) 4
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L1800 Revision A
Table 1-4. Indicators (LEDs) Function
Printer Status
Power off (shutting down)
Firmware update (While preparing) -- -- --
Firmware update (Starting) Flashes OFF OFF
Fatal error OFF
Ink waste pad overflow error --
Ink waste pad near end error --
Paper jam error -- Flashes -- 6
Initial Ink Charge Preparing Flashes -- OFF 7
Initial Ink Charge Waiting ON -- ON 8
Initial Ink Charging
Multi-feed error -- ON -- 11
Paper out error -- ON -- 12
Ink Sequence Flashes -- -- 13
PC Printing Flashes -- -- 14
Stop printing & job canceling Flashes -- -- 15
Loading / Ejecting Flashes -- -- 16
Power On Sequence Flashes -- -- 17
Idle ON -- -- 18
Reset Requirement*
2
Power Paper Ink
Flashes at
high speed
Flashes
alternately 1
Indicators (LEDs)
-- -- 1
Flashes at
high speed
Flashes
alternately 1
Flashes
alternately 1
--
ON ON ON --
Flashes at
high speed
Flashes
alternately 2
Flashes
alternately 2
Flashes
alternately 2
Priority*
Note : --:No change
Flash: Repeats turning On and Off every 1.25 seconds.
1
2
3
4
5
9
Flash at high speed: Repeats turning On and Off every 0.5 seconds. Flashes alternately 1:Same as the “Flash” Flashes alternately 2:Repeats turning Off and On every 1.25 seconds.
Note *1: When two or more errors occur at the same time, the one with higher priority will be
indicated.
*2: The all LEDs light for 0.2 seconds when a reset requirement is received.
Product Description Operation Buttons & Indicators (LEDs) 5
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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. Turn off the unit.
Change the absorber in the printer enclosure by a service person. and write EEPROM’s data.
Ink waste pad near end error When the ink waste fluid nears full capacity. Press the Release error key.
By pressing the Stop key, it cancels print data.
Paper jam error When the paper loading or paper ejecting is not success.
Paper out error Failure to load paper to print.
Multiple feed error When the paper is ejected without printing.
When the fed paper size is longer than the specified value during duplex printing.
Remove paper and push the Release error key to continue.By pressing the Release error key, ejects the paper and continue the procedure if
the paper ejecting is success.
By pressing the Cancel key, it cancels error display and cancels print data and
returns from error status.
Set paper and push the Release error key to continue.By pressing the Release error key, feeds the paper and continue the procedure if
the paper feeding is success.
By pressing the Stop key, it cancels error display and cancels print data and
returns from error status.
Reset the incorrectly ejected paper and push the Release error key to continue.By pressing the Release error key, feeds the paper and continue the procedure if
the paper feeding is success.
By pressing the Stop key, it cancels error display and cancels print data and
returns from error status.
Note : For more information on the remedies, see “2.1.1 Troubleshooting according to Error Messages” (p.8).
Product Description Operation Buttons & Indicators (LEDs) 6
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TROUBLESHOOTING

CHAPTER
2
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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” and change the corresponding part and/or unit. The following table indicates the check point reference tables corresponding to the error states (LED and STM3).
Table 2-1. List of Error Messages
Error Status
Paper out error
Paper jam error
Multi-feed error
Maintenance request
Fatal error
Note : --: No change
Flash: Repeats turning On and Off every 1.25 seconds. Flash at high speed: Repeats turning On and Off every 0.5 seconds. Flashes alternately 1: Same as the “Flash” Flashes alternately 2: Repeats turning Off and On every 1.25 seconds.
Power Paper Ink
- Light -
-Flash-
- Light -
Off Flashes alternately 1 Flashes alternately 2
Off Flashes at high speed Flashes at high speed
LED Indications
See the table for Troubleshooting
Refer to Table 2-3 “Troubleshooting of Paper Out Error” (P.11)
Refer to Table 2-4 “Troubleshooting of Paper Jam Error” (P.13)
Refer to Table 2-5 “Troubleshooting of Multi-feed error” (P.14)
Refer to Table 2-6 “Troubleshooting of Maintenance Request” (P.14)
Refer to Table 2-7 “Troubleshooting of Fatal Error” (P.15)
Troubleshooting Overview 8
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L1800 Revision A
Panel FFC
CN4
Panel Board
connector
Panel FFC
Connector cable of the
Power Supply Board
CN60
Table 2-2. Troubleshooting of Communication Error
Occurrence
Timing
Phenomenon Detail
Faulty Part/
Part Name
Check Point Remedy
At power-on The printer does not operate at all. Panel FFC 1. Check that the Panel FFC is connected to the Panel Board
connector and Main Board connector CN4.
2. Check the Panel FFC for damages. 2. Replace the Panel FFC with a new one.
Panel Board 1. Check the Panel Board for damages. 1. Replace the Panel Board with a new one.
Power Supply Board
1. Check that the connector cable of the Power Supply Board is connected to the Main Board connector CN60.
1. Connect the Panel FFC to the Panel Board and Main Board connectors.
1. Connect the connector cable of the Power Supply Board to the Main Board connector CN60.
Troubleshooting Overview 9
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L1800 Revision A
Fuse F1
Power Supply Board
Table 2-2. Troubleshooting of Communication Error
Occurrence
Timing
At power-on The printer does not operate at all. Power Supply
At operation Operation at power-on is normal,
Phenomenon Detail
but the error appears when the print job is sent to the printer.
Faulty Part/
Part Name
Board
Interface cable 1. Check that the Interface cable is connected between the PC and
Check Point Remedy
2. Check that the Fuse F1 on the Power Supply Board has not blown.
3. Check the components on the Power Supply Board for damage. 3. Replace the Power Supply Board with a new
printer.
2. Check the Interface cable for breaking. 2. Replace the Interface cable with a new one.
2. Replace the Power Supply Board with a new one.
one.
1. Connect the Interface cable to the PC and printer.
USB 1. Check that the PC and printer are connected via the USB hub. 1. Configure the USB ID setting.
Refer to Chapter 4 “Adjustment ”.
Printer Driver 1. Check that the printer driver for L1800 has already been
installed.
2. Check that the connected printer is L1800. 2. Connect the L1800 printer.
Main Board 1. Check that a wrong model name has not been input to the
EEPROM on the Main Board.
1. Install the printer driver for L1800.
1. Make the initial setting using the Adjustment Program. Refer to Chapter 4 “Adjustment ”.
Troubleshooting Overview 10
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L1800 Revision A
Cleaning sheet Postcard used
as mount
Non-adhesive part
Adhesive part
This side down
Stapling
Cloth damped
with alcohol
Table 2-3. Troubleshooting of Paper Out Error
Occurrence
Timing
Phenomenon Detail
At operation When the Paper Switch is
pressed, the LD Roller attempt to feed paper but the paper is not fed.
Faulty Part/
Part Name
Check Point Remedy
ASF Assy. 1. Check the LD Roller or Retard Roller of the ASF Assy for paper
dust and foreign matter.
1. Using a cleaning sheet, clean the LD Roller and Retard Roller. The procedure is as follows.
(1) Place the cleaning sheet upside down and
put it into the ASF Assy.
(2) Press the Paper Switch to start paper feed.
(3) Repeat the above steps several times.
* To remove persistent contamination, staple
an alcohol-dampened cloth to a postcard and clean the rollers in the following method.
(1) Place the alcohol-dampened cloth toward
the LD Roller surface of the ASF Assy.
(2) Hold the mount top end securely and press
the Paper Switch.
(3) Repeat the paper feed sequence several
times to clean the LD Roller surface of the ASF Assy.
Troubleshooting Overview 11
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L1800 Revision A
CN2
PE Sensor connector
Sensor Holder
Detection Lever
Torsion Spring
Table 2-3. Troubleshooting of Paper Out Error
Occurrence
Timing
At operation Paper Mismatch Error is
Phenomenon Detail
indicated.
Faulty Part/
Part Name
PE Sensor 1. Check that the connector cable of the PE Sensor is securely
connected to the PE Sensor and Relay Board connector CN2.
2. Check that the Sensor Holder is mounted to the Mechanical frame correctly.
Check Point Remedy
1. Connect the connector cable of the PE Sensor to the PE Sensor and connector CN2 on the Relay Board correctly.
2. Install the Sensor Holder correctly.
3. Move the Detection Lever manually as when the paper passes, and check that the Detection Lever returns to the original position automatically by the Torsion Spring when released. Refer to the above photo.
4. Using a tester, check that the PE Sensor is normal.
Paper absent : 2.4V or more Paper present : 0.4V or less
Troubleshooting Overview 12
3. Replace the PE Sensor Holder Unit with a new one.
4. Replace the PE Sensor Holder Unit with a new one.
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L1800 Revision A
Paper EJ Frame Assy.
Star Wheel Units
Spur Gear 68
Spur Gear 16; B
Table 2-4. Troubleshooting of Paper Jam Error
Occurrence
Timing
At operation At the time of paper ejection, the
Phenomenon Detail
PF Roller advances the paper but cannot eject it completely.
Paper is not ejected completely and causes a jam near the Paper Eject Frame.
Faulty Part/
Part Name
– 1. Check that the size of the fed paper is not larger than that of the
paper specified by the driver.
ASF Assy. 1. Check that the paper is fed along the Right Edge Guide. 1. Feed the paper along the Right Edge Guide.
Paper EJ Frame Assy.
Spur Gear 68 Spur Gear 16; B Paper EJ Roller Assy.(front/rear)
1. Check that the Star Wheel Units have not come off the Paper EJ Frame Assy.
2. Check the Paper EJ Frame Assy for deformation or damages. 2. Replace the Paper EJ Frame Assy with a new
1. Check the Spur Gear 68 or Spur Gear 16; B for damages. 1. Replace the Front (or Rear) Paper EJ Roller
Check Point Remedy
1. Tell the user that the paper size specified by the driver is not available for the printer.
1. Securely install the Star Wheel Units to the Paper EJ Frame Assy.
one.
Assy with a new one.
Troubleshooting Overview 13
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L1800 Revision A
Extension Spring
Retard Roller
Assy
Bottom of
the ASF Assy
ASF Assy
Table 2-5. Troubleshooting of Multi-feed error
Occurrence
Timing
Any time During manual double-sided
Occurrence
Timing
At power-on At power-on, the printer does not
Phenomenon Detail
printing, multiple sheets are fed at a time.
Phenomenon Detail
operate at all.
Faulty Part/Part
Name
ASF Assy 1. Check that the Retard Roller Assy is moving properly during the
feeding operation.
2. Check that the position of the ASF Guide Roller LDs has been adjusted correctly.
Check Point Remedy
Table 2-6. Troubleshooting of Maintenance Request
Faulty Part/
Part Name
Waste Ink Pads 1. Using the Adjustment Program, check if the values of the
Protection Counter A and B have exceeded the threshold value.
Check Point Remedy
1. Attach the Extension Spring on the back side of the Retard Roller Assy correctly. Refer to Chapter 3 Retard Roller Assy (P.76).
2. Adjust the position of the ASF Guide Roller LDs. Refer to Chapter 3 ASF Assy (P.71).
1. Replace the Waste Ink Pads and reset the Protection Counter A and B value with the Adjustment Program.
Troubleshooting Overview 14
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L1800 Revision A
CN115
Table 2-7. Troubleshooting of Fatal Error
Occurrence
Timing
At power-on At power-on, the CR Motor does
Phenomenon Detail
not operate at all.
Faulty Part/
Part Name
CR Motor 1. Check the CR Motor connector cable for damages. 1. Replace the CR Motor with a new one.
2. Check if the CR Motor operates normally. 2. Replace the CR Motor with a new one.
3. Check that the CR Motor connector cable is connected to the Main Board connector CN115.
Check Point Remedy
3. Connect the CR Motor connector cable to the Main Board connector CN115.
Troubleshooting Overview 15
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L1800 Revision A
Carriage Shaft
CN116
Table 2-7. Troubleshooting of Fatal Error
Occurrence
Timing
At power-on The power-on sequence is
Phenomenon Detail
executed but Fatal error is displayed.
Faulty Part/
Part Name
CR drive mechanism
Check Point Remedy
1. Check that the Carriage Shaft is lubricated with grease. 1. Wipe the surface of the Carriage Shaft with a dry, soft cloth, and lubricate the Carriage Shaft with grease G-71. Refer to Chapter 5 “Maintenance ”.
At power-on, the PF Motor does not operate at all.
PF Motor 1. Check that the connector cable of the PF Motor is connected to
the Main Board connector CN116.
2. Check the PF Motor connector cable for damages. 2. Replace the PF Motor with a new one.
3. Check if the PF Motor operates normally. 3. Replace the PF Motor with a new one.
1. Connect the PF Motor connector cable to the Main Board connector CN116.
Troubleshooting Overview 16
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L1800 Revision A
CN118
CN117
Table 2-7. Troubleshooting of Fatal Error
Occurrence
Timing
At power-on At power-on, the APG Motor
Phenomenon Detail
does not operate at all.
At power-on, the Pump Motor does not operate at all.
Faulty Part/
Part Name
APG Motor 1. Check that the connector cable of the APG Motor is connected
to the Main Board connector CN118.
2. Check the APG Motor connector cable for damage. 2. Replace the APG Assy with a new one.
3. Check if the APG Motor operates normally. 3. Replace the APG Assy with a new one.
Pump Motor 1. Using a tester, check the resistance value of the Pump Motor.
Value of resistance: 10.3 ± 10%
2. Check the Pump Motor connector cable for damages. 2. Replace the Ink System with a new one.
3. Check that the Pump Motor connector cable is connected to the Main Board connector CN117.
Check Point Remedy
1. Connect the APG Motor connector cable to the Main Board connector CN118.
1. If the resistance value is abnormal, replace the Ink System with a new one.
3. Connect the Pump Motor connector cable to the Main Board connector CN117.
4. Check the Pump Motor connector cable for damages. 4. Replace the Ink System with a new one.
Troubleshooting Overview 17
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L1800 Revision A
APG Sensors
APG Sensor connector cables
Table 2-7. Troubleshooting of Fatal Error
Occurrence
Timing
At power-on While the power-on sequence is
Phenomenon Detail
being executed, Fatal error is displayed.
Faulty Part/
Part Name
APG Sensor 1. Check the APG Sensor connector cables is connected to the
APG Sensor connectors.
2. Check if the connector cables of the APG Sensor is broken.
3. Check the APG Sensors for damages. 3. Replace the APG Assy with a new one.
Check Point Remedy
1. Connect the APG Sensor connector cables to the APG Sensor connectors.
2. Replace the ASF Assy with a new ones.
Troubleshooting Overview 18
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L1800 Revision A
Relay connector
ASF Motor
CN119
Table 2-7. Troubleshooting of Fatal Error
Occurrence
Timing
At power-on While the power-on sequence is
Phenomenon Detail
being executed, Fatal error is displayed.
Faulty Part/
Part Name
ASF Motor 1. Check that the connector cable of the ASF Motor is connected
to the Relay connector.
Check Point Remedy
1. Connect the connector cable of the ASF Motor to the Relay connector.
Relay connector cable
2. Using a tester, check the resistance value of the ASF Motor. Value of resistance: 7.0  ±10%
3. Check the ASF Motor connector cable for damages. 3. Replace the ASF Motor with a new one.
1. Check that the Relay connector cable is connected to the Main Board connector CN119.
2. Check the Relay connector cable for damages. 2. Replace the Relay connector cable with a new
2. If the resistance value is abnormal, replace the ASF Motor with a new one.
1. Connect the Relay connector cable to the Main Board connector CN119.
one.
Troubleshooting Overview 19
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L1800 Revision A
CN1
CN5
Relay FFC
CR Scale
CR Encoder
Sensor Board
Table 2-7. Troubleshooting of Fatal Error
Occurrence
Timing
At power-on While the power-on sequence is
Phenomenon Detail
being executed, Fatal error is displayed.
At power-on, the Carriage Unit moves away from the home position and bumps against the right of the Frame, then hits the left of the Frame.
Faulty Part/
Part Name
Relay FFC 1. Check that the Relay FFC is connected to the Relay Board
connector CN1 and Main Board connector CN5.
2. Check the Relay FFC for damages. 2. Replace the Relay FFC cable with a new one.
CR Scale 1. Check that the CR Scale is inserted in the slit of the CR
Encoder Sensor.
Check Point Remedy
1. Connect the Relay FFC to the Relay Board connector CN1 and Main Board connector CN5.
1. Insert the CR Scale into the slit of the CR Encoder Sensor.
2. Check the CR Scale for damages and dirt. 2. Wipe off the dirt completely or replace the CR Scale with a new one.
CR Encoder
Troubleshooting Overview 20
Sensor Board
1. Check the CR Encoder Sensor for paper dust, etc. 1. Remove the paper dust, etc. from the CR Encoder Sensor.
2. Check the CR Encoder Sensor Board for damages. 2. Replace the CR Encoder Sensor Board with a new one.
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L1800 Revision A
CN9
CR Encoder Sensor
Board connector
CN6
PF Encoder Sensor
Board connector
Table 2-7. Troubleshooting of Fatal Error
Occurrence
Timing
At power-on At power-on, the Carriage Unit
Phenomenon Detail
moves away from the home position and bumps against the right of the Frame, then hits the left of the Frame.
At power-on, the PF Roller rotates fast about a half turn.
Faulty Part/
Part Name
Sensor FFC 1. Check that the Sensor FFC is connected to the CR Encoder
Sensor Board connector and Main Board connector CN9.
2. Check the Sensor FFC for damages. 2. Replace the Sensor FFC with a new one.
PF Encoder Sensor Holder
1. Check that the PF Encoder Sensor Holder is mounted correctly. 1. Install the PF Encoder Sensor Holder
2. Check that the FFC of the PF Encoder Sensor is securely
connected to the PF Encoder Sensor Board connector and Relay Board connector CN6.
Check Point Remedy
1. Connect the Sensor FFC to the CR Encoder Sensor Board connector and Main Board connector CN9.
correctly.
2. Connect the PF Encoder Sensor FFC to the PF Encoder Sensor Board and Relay Board connector CN6.
3. Check the PF Encoder Sensor for paper dust, etc. 3. Remove the paper dust, etc. from the PF Encoder Sensor.
4. Check if the PF Encoder or the FFC is damaged. 4. Replace the PF Encoder with a new one.
Troubleshooting Overview 21
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L1800 Revision A
Slit
PF Scale
CN9, CN12, CN13, CN14
Table 2-7. Troubleshooting of Fatal Error
Occurrence
Timing
At power-on At power-on, the PF Roller
During printing After receiving a print data, an
Phenomenon Detail
rotates fast about a half turn.
error is displayed on the LED and STM3.
Faulty Part/
Part Name
PF Scale 1. Check that the PF Scale is inserted in the slit of the PF Encoder
Sensor.
2. Check the PF Scale for damages and dirt. 2. Replace the PF Scale with a new one.
Head FFC Sensor FFC
1. Check that the Head FFC and the Sensor FFC are securely
connected to the Main Board connectors CN9, CN12, CN13, and CN14.
Check Point Remedy
1. Install the PF Scale in the slit of the PF Encoder Sensor correctly.
1. Connect the Head FFC and the Sensor FFC to the Main Board connectors CN9, CN12, CN13, and CN14.
Troubleshooting Overview 22
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L1800 Revision A
CN12, CN13, CN14
Print Head Connector
Head FFC
Table 2-7. Troubleshooting of Fatal Error
Occurrence
Timing
During printing After starting to print, ink is not
Phenomenon Detail
ejected and paper stops midway.
Faulty Part/
Part Name
Head FFC 1. Check that the Head FFC is securely connected to the Main
Board connectors CN12, CN13, and CN14.
2. Check the Head FFC for damages. 2. Replace the Head FFC with a new one.
Head FFC 1. Check that the Head FFC is securely connected to the Print
Head connectors.
Check Point Remedy
1. Connect the Head FFC to the Main Board connectors CN12, CN13, and CN14.
1. Connect the Head FFC to the CR Relay Board connectors CN1 and CN2.
2. Connect the Head FFC to the Print Head connectors.
2. Check the Head FFC for damages. 3. Replace the Head FFC with a new one.
Ink is not ejected from most nozzles.
Troubleshooting Overview 23
Print Head 1. Check for occurrence of Head Hot. 1. Replace the Print Head with a new one.
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L1800 Revision A
Seal Rubbers
Extension Spring, 1.19 IS

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
Observed Faults Details of the Fault
Dot missing and mixed colors
Inks are not ejected from the Print Head to the Cap.
Although inks are ejected from the Print Head to the Cap, the trouble still occurs after executing a cleaning cycle.
Faulty Part/
Part Name
Ink System Unit (Cap)
Print Head 1. Run a Nozzle Check, and check the printed pattern if it has
1. Check for foreign matter around the Seal Rubber on the Cap Unit.
2. Check that the Extension Spring 1.19 IS is correctly installed to the Cap Unit.
broken lines or missing segments.
Check Point Remedy
1. Remove the foreign matter around the Seal Rubber completely.
2. Replace the Ink System Unit with a new one.
1. After running a Head Cleaning, check the Nozzle Check Pattern again.
Troubleshooting Overview 24
Confidential
L1800 Revision A
CN12, CN13, CN14
Print Head Connector
Head FFC
Table 2-8. Print Quality Troubles
Observed Faults Details of the Fault
Dot missing and mixed colors
Although inks are ejected from the Print Head to the Cap, the trouble still occurs after executing a cleaning cycle.
Faulty Part/
Part Name
Head FFC 1. Check that the Head FFC is securely connected to the Main
Board connectors CN12, CN13, and CN14.
2. Check the Head FFC for damages. 2. Replace the Head FFC with a new one. If the
Head FFC 1. Check that the Head FFC is securely connected to the Print Head
connectors.
Check Point Remedy
1. Connect the Head FFC to the Main Board connectors CN12, CN13, and CN14.
trouble still occurs after replacing it, replace the Print Head with a new one.
1. Connect the Head FFC to the CR Relay Board connectors CN1 and CN2.
2. Connect the Head FFC to the Print Head connectors.
2. Check the Head FFC for damages. 3. Replace the Head FFC with a new one. If the trouble still occurs after replacing it, replace the
Troubleshooting Overview 25
Print Head with a new one.
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