Epson WP-4540 series/ Epson WP-4530 series
Epson WP-4520 series/ Epson WP-4510 series
Epson WP-4020 series/ Epson WP-4010 series
CONFIDENTIAL
SEMF11-002
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, photocopying, recording, or otherwise, without the prior written permission of
SEIKO EPSON CORPORATION.
All effort have been made to ensure the accuracy of the contents of this manual. However, should any errors be
detected, SEIKO EPSON would greatly appreciate being informed of them.
The contents of this manual are subject to change without notice.
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.
Note :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.
All safety procedures described here shall be strictly adhered to by all parties servicing and maintaining this
product.
DANGER
Strictly observe the following cautions. Failure to comply could result in serious bodily injury or loss of life.
1. Always disconnect the product from the power source and peripheral devices when servicing the product or
performing maintenance.
2. When performing works described in this manual, do not connect to a power source until instructed to do so.
Connecting to a power source causes high voltage in the power supply unit and some electronic components
even if the product power switch is off. If you need to perform the work with the power cable connected to a
power source, use extreme caution to avoid electrical shock.
WARNING
Strictly observe the following cautions. Failure to comply may lead to personal injury or loss of life.
1. Always wear protective goggles for disassembly and reassembly to protect your eyes from ink in working. If
any ink gets in your eyes, wash your eyes with clean water and consult a doctor immediately.
2. 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.
PRECAUTIONS
Strictly observe the following cautions. Failure to comply may lead to personal injury or damage of the product.
1. Repairs on Epson product should be performed only by an Epson certified repair technician.
2. No work should be performed on this product by persons unfamiliar with basic safety knowledge required for
electrician.
3. The power rating of this product is indicated on the serial number/rating plate. Never connect this product to
the power source whose voltages is different from the rated voltage.
4. Replace malfunctioning components only with those components provided or approved by Epson;
introduction of second-source ICs or other non-approved components may damage the product and void any
applicable Epson warranty.
5. In order to protect sensitive microprocessors and circuitry, use static discharge equipment, such as anti-static
wrist straps, when accessing internal components.
6. Do not tilt this product immediately after initial ink charge, especially after performing the ink charge several
times. Doing so may cause ink to leak from the product because it may take some time for the waste ink pads
to completely absorb ink wasted due to the ink charge.
7. Never touch the ink or wasted ink with bare hands. If ink comes into contact with your skin, wash it off with
soap and water immediately. If you have a skin irritation, consult a doctor immediately.
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8. When disassembling or assembling this product, make sure to wear gloves to avoid injuries from metal parts
with sharp edges.
9. Use only recommended tools for disassembling, assembling or adjusting the printer.
10. Observe the specified torque when tightening screws.
11. Be extremely careful not to scratch or contaminate the following parts.
Nozzle plate of the printhead
CR Scale
PF Scale
ASF Scale
Coated surface of the PF Roller
Gears
Rollers
LCD
Scanner Sensor
Exterior parts
12. Never use oil or grease other than those specified in this manual. Use of different types of oil or grease may
damage the component or give bad influence on the printer function.
13. Apply the specified amount of grease described in this manual.
14. Make the specified adjustments when you disassemble the printer.
15. When cleaning this product, follow the procedure described in this manual.
16. When transporting this product after filling the ink in the printhead, pack the printer without removing the
ink cartridges in order to prevent the printhead from drying out.
17. Make sure to install antivirus software in the computers used for the service support activities.
18. Keep the virus pattern file of antivirus software up-to-date.
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About This Manual
This manual, consists of the following chapters, is intended for repair service personnel and includes information
necessary for properly performing maintenance and servicing the product.
CHAPTER 1. PRODUCT DESCRIPTIONS
Provides a general overview and specifications of the product.
CHAPTER 2. OPERATING PRINCIPLES
Describes the theory of mechanical operations of the product.
CHAPTER 3. TROUBLESHOOTING
Describes the step-by-step procedures for the troubleshooting.
CHAPTER 4. DISASSEMBLY / REASSEMBLY
Describes the disassembly/reassembly procedures for main parts/units of the product.
CHAPTER 5. ADJUSTMENT
Describes the required adjustments for servicing the product.
CHAPTER 6. MAINTENANCE
Describes maintenance items and procedures for servicing the product.
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. Pay attention to all symbols when they are
used, and always read explanation thoroughly and follow the instructions.
Indicates an operating or maintenance procedure, practice or condition that, if not strictly observed,
could result in serious injury or loss of life.
Indicates an operating or maintenance procedure, practice, or condition that, if not strictly observed,
could result in bodily injury, damage or malfunction 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.
For Chapter 4 “Disassembly/Reassembly”, symbols other than indicated above are used to show additional
information for disassembly/reassembly. For the details on those symbols, see "4.2 Disassembly/Reassembly
Procedures (p58)".
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Revision Status
RevisionDate of IssueDescription
AJune 17, 2011First Release
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Epson WP-4540/4530/4520/4510/4020/4010 seriesRevision A
Contents
Chapter 1 Product description
1.1 Features ................................................................................................................................................................... 10
1.4 Control Panel ........................................................................................................................................................... 14
1.4.2 LEDs and LCD Indications ............................................................................................................................ 17
1.5 Various Settings ...................................................................................................................................................... 22
1.5.1.1 Setup Menu Configuration (WP-4540/4530/4520/4510 series only) .................................................... 22
1.5.1.2 Panel Operation Lock Setting (WP-4540/4530/4520/4510 series only) ............................................... 23
1.5.1.3 Forced Power OFF................................................................................................................................. 24
1.5.1.4 Printer Status Sheet ................................................................................................................................ 24
4.2.3.1 Parts/Units whose Configuration is Different between Models in the Flowchart ................................. 60
4.2.3.2 Exterior Parts ......................................................................................................................................... 62
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7
Epson WP-4540/4530/4520/4510/4020/4010 seriesRevision A
5.2.4 Checking the Platen Gap ................................................................................................................................ 96
5.2.5 MAC Address Setting..................................................................................................................................... 97
5.2.6 Touch Panel Adjustment (WP-4540 series only) ........................................................................................... 98
6.2 Lubrication Points and Instructions....................................................................................................................... 106
8
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CHAPTER 1
PRODUCT DESCRIPTION
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Epson WP-4540/4530/4520/4510/4020/4010 seriesRevision A
1.1 Features
In this manual, the product name is abbreviated to such as “WP-4510 series”, however, the
last digit of the actual name may differ. Identify your product with the first three digits and
refer to the appropriate sections in this manual.
WP-4540/4530/4520/4510/4020/4010 series are color inkjet printers that achieve high quality and high speed
printing with a new printer mechanism. The main features are as follows.
Epson WP-4540/4530/4520/4510/4020/4010 seriesRevision A
Table 1-8. LEDs and LCD Indications
WP-4020/4010 seriesWP-4540/4530/4520/4510 series
LED status
Status
PowerWi-Fi*1Ethernet
Mainte-
nance
box
Paper
Ink
(BK/C/
M/Y)
LCD message
*2
Operating
CancelingFlash---------------Canceling...
Cleaning (PC)Flash---------------
Print head
cleaning
Flash---------------
Canceling
nozzle check
Flash---------------
Cleaning print head. Please wait...
Do not open front cover.
Cleaning print head. Please wait...
Do not open front cover.
Canceling...
pattern print
Canceling
printer status
Flash---------------
Canceling...
sheet print
Initializing
network
Waiting for
network
Flash
Flash
*5
*5
Alternate
Flash2
Alternate
Flash1
---------
Processing... Please wait.
------------------
initialization
Network
initialization
OFF
*5
ONON------------
(LED ON)
Network
initialization
OFF
*5
OFFOFF------------
(LED OFF)
Configuring
wireless
*9
LAN
Configuring
PINCODE
*9
Preparing to
update
firmware
(cancel)
Updating
firmware
Preparing to
update
firmware
Canceling
firmware
update
Powering OFF
ON
ON
*5
ON
ON to
flash
*5
ON
*5
ON
Flash at
high
speed
Alternate
Flash2
Simulta-
neous
Flash
Simulta-
neous
Flash
Alternate
Flash1
Simulta-
neous
Flash
Simulta-
neous
Flash
---------
---------
---------
OFFOFFOFFOFFOFF
Simulta-
neous
Flash
Simulta-
neous
Flash
Simulta-
neous
Flash
Simulta-
neous
Flash
---------
---------
---------------
Establishing a Wi-Fi connection
with Push-Button mode...
Establishing a Wi-Fi connection
with WPS PIN code mode...
PIN Code XXXXXXXX
*10
Preparing to update...
Updating firmware... Do not turn
power off. It turns off and on
automatically when complete.
Preparing to update...
Canceling...
Turning off...
Product descriptionControl Panel19
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Epson WP-4540/4530/4520/4510/4020/4010 seriesRevision A
Table 1-8. LEDs and LCD Indications
WP-4020/4010 seriesWP-4540/4530/4520/4510 series
LED status
Status
PowerWi-Fi*1Ethernet
Mainte-
nance
box
Paper
Ink
(BK/C/
M/Y)
LCD message
*2
Operating
Resetting
Flash at
high
---------------
Restarting product from other
device...
speed
Powering ONFlash
Feeding a paper
(load/eject)
Flash------------------
Alternate
Flash2
Alternate
Flash1
------------
StandbyNo errorON------------------
Maintenance
box near full
ON
Ink level lowON
Front cover
open error
Maintenance
box full
Maintenance
box CSIC error
Flash---------Flash2---
ON
ON
No
maintenance
ON
box error
*5
*5
*5
*5
*5
------Flash------
------------Flash
------ON------
------ON------
------ON------
Maintenance box is nearing end of
its service life.
*8
Ink low.
Front cover is open.
Maintenance box is at the end of its
service life. You need to replace it.
<Maintenance Box> XXXXX
Cannot recognize maintenance
box. Install it correctly.
<Maintenance Box> XXXXX
Cannot recognize maintenance
box. Install it correctly.
<Maintenance Box> XXXXX
*6
*6
*6
Ink end errorON
No ink
cartridge error
Ink cartridge
detection error
ON
ON
Ink cartridge
detection error
(non-Epson
ON
cartridge)
Access point
setting error
(security
information
exchange)
*9
ON---
Access point
setting error
(general)
*9
ON---Flash---------
*5
------------ON
You need to replace the following
*8
ink cartridge(s).
<Ink Cartridges> XXX
*6
The cartridge is installed
*5
*5
------------ON
------------ON
incorrectly. Press it until it clicks
*8
into place.
<Ink Cartridges> XXX
Cannot recognize the following
*8
cartridge(s). Try installing them
again. <Ink Cartridges> XXX
*6
*6
Ink cartridge is not recognized.
*5
------------ON
Please replace the cartridge.
*8
<Ink Cartridges> XXX
*6
Security error while setting Wi-Fi
Flash at
high
---------
with your access point. Try again.
speed
Error while setting Wi-Fi with
your access point. Try again.
Product descriptionControl Panel20
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Epson WP-4540/4530/4520/4510/4020/4010 seriesRevision A
Table 1-8. LEDs and LCD Indications
WP-4020/4010 seriesWP-4540/4530/4520/4510 series
LED status
Status
PowerWi-Fi*1Ethernet
Mainte-
nance
box
Paper
Ink
(BK/C/
M/Y)
LCD message
*2
Standby
Access point
setting error
(registration)
*9
Access point
setting error
(PINCODE
authentication)
Wireless LAN
connection
*9
error
Network
connection
time out error
ON---Flash---------
ON---Flash---------
*9
ON---Flash---------
ON---Flash---------
*9
Registration error.
The access point is busy. Try
again.
PIN code authentication error.
Make sure the PIN code is correct.
The Wi-Fi/network connection
failed.
Print the check report?
The Wi-Fi/network connection
failed.
Print the check report?
Note :--No change
Flash:turns on and off at intervals of 1.25 seconds.
Flash 2: On for 0.5 sec., Off for 0.5 sec., On for 0.5 sec. and Off for 1.0 sec.
Flash at high speed: turns on and off at intervals of 0.5 seconds.
Simultaneous Flash:same as “Flash”
Alternate flash 1:same as “Flash”
Alternate flash 2: turns on and off at intervals of 1.25 seconds.
Note *1: WP-4020 series only
*2: The message WP-4540 series indicates is different but the meaning is the same.
*3: WP-4540/4530/4520/4510 series only
*4: WP-4540/4530/4520 series only
*5: Flashes if the status arises when printing starts or when the printer starts up, but lights if the status arises when printing is
complete.
*6: The corresponding maintenance box, ink cartridge product number or cassette number is indicated.
*7: Occurs in any paper path.
*8: The corresponding ink LED flashes after the ink falls in the ink low status, and lights when it reaches the ink end status.
*9: WP-4540/4530/4020 series only
*10: The corresponding PIN number is indicated.
Product descriptionControl Panel21
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Epson WP-4540/4530/4520/4510/4020/4010 seriesRevision A
1.5 Various Settings
1.5.1 Panel Operation
1.5.1.1 Setup Menu Configuration (WP-4540/4530/4520/4510 series only)
The following explains the setup menu structure and the outline of the menu functions.
Table 1-9. Menu Configuration
MenuDescription
SetupInk Levels---Displays the status of ink cartridges and maintenance box.
MaintenanceNozzle CheckPrints a nozzle check pattern.
Head CleaningRuns a print head cleaning.
Head AlignmentAdjusts the alignment of the printhead.
*
Printer SetupPaper Size LoadedSelects the paper size (1st cassette/2nd cassette
Thick PaperTurn this on when printing on thick paper.
Dry TimeSets the dry time when duplex printing.
SoundTurns the sound on/off.
Date/TimeSelects display format for data/time.
Daylight Saving TimeSelects daylight saving time.
Country/RegionSelects country/region.
LanguageSelects the language displayed on the LCD.
Paper Size NoticeChecks the paper size and selects whether to alert users when an
Print Status Sheet---Prints a printer status sheet.
Lock SettingsOn
Restore Default
Settings
Wi-Fi SetupSelects a connection method for wireless LAN.
Manual Wi-Fi/Network Setup
Wi-Fi/Network Connection
Check
Confirm Wi-Fi/Network
Settings
Wi-Fi/Network
Receive SettingsConfigures fax receive settings.
CommunicationConfigures the details of the fax communication.
Check Fax ConnectionPrints the fax connection settings.
(“Off” when panel operation
is locked)
Change PasswordChanges the password. (See "1.5.1.2 Panel Operation Lock
Fax Send/Receive SettingsInitializes the fax send/receive settings.
Fax Data SettingsDeletes the fax data settings.
Wi-Fi/Network SettingInitializes the Wi-Fi/network settings.
All except Wi-Fi/Network &
Fax Settings
All SettingsInitializes the all settings.
Configures the connection setting for manual setup.
• Checks the network connection status.
• Prints the connection check result.
• Displays the network information.
• Prints a network status sheet.
Sets the access priority when accessing the storage device
connected to the USB host port to USB or Wi-Fi/Network.
Changes the setting of the panel operation lock. (See "1.5.1.2
Panel Operation Lock Setting (WP-4540/4530/4520/4510 series
only) (p23)".)
Setting (WP-4540/4530/4520/4510 series only) (p23)".)
Initializes the settings except Wi-Fi/network/fax settings.
/Rear MP Tray).
Note :The setting items for Wi-Fi is for WP-4540/4530 series only.
Note *:When the optional 2nd cassette is installed for WP-4530/4520/4510/4020/4010 series.
Product descriptionVarious Settings22
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Epson WP-4540/4530/4520/4510/4020/4010 seriesRevision A
1.5.1.2 Panel Operation Lock Setting (WP-4540/4530/4520/4510 series only)
For WP-4540/4530/4520/4510 series, the panel operation for the following can be locked after setting the
password.
The same password is also required when configuring the printer settings through
EPSON NetConfig.
All settings will be initialized when resetting the password.
Table 1-10. Panel Operation Lock Setting
ONThe password is required for the following settings.
• Lock settings
• Printer setup
• Wi-Fi/Network settings
• File sharing setup
• Restoration of individual settings such as network setting (except initializing the all settings)
OFFEntering the password is not required to go to the setting screen even the password is registered.
Password setting method
1. Select “Setup” - “Lock Settings” - “On”, and then press “OK”.
2. Enter the password, and then press “OK”.
3. To verify the password, enter the password again and press “OK”.
Table 1-11. Password Setting
Item
WP-4540 seriesWP-4530/4520/4510 series
Digit of the passwordWithin 1 to 20
Available charactersSpace, !”#$%&'()*+,-./, 0-9, ;<=>?@ A-Z, \]^_`, a-z, {|}~
MethodSelect characters with arrows or ten key. When a
password is already set, the following three
password entries are required: “Enter Current
Password”, “Enter New Password”, and “Verify
New Password”.
Note 1: The password is not set when shipping from the factory.
2: If the entries “Enter New Password” and “Verify New Password” are different, the message “Password is incorrect. Enter correct
password.” is displayed and the menu screen returns to the password entering screen.
3: If the entries up to “Verify New Password” are complete successfully, the change will be reflected and the LCD display returns to
the setup menu.
4: The password is stored on the EEPROM, and kept even the power is off.
Description
Select characters with the arrow buttons. When a
password is already set, the following three
password entries are required: “Enter Current
Password”, “Enter New Password”, and “Verify
New Password”.
Panel operation lock method
1. Select “Setup” - “Lock Settings” - “On”, and then press “OK”.
2. Enter the password, and then press “OK”.
3. When “Free access limited” displays, press “OK”. Then the panel lock setting becomes valid.
Product descriptionVarious Settings23
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Epson WP-4540/4530/4520/4510/4020/4010 seriesRevision A
Resetting the password/unlocking the panel operation lock
If you need to reset the password or unlock the panel operation because of forgetting the password and such,
follow the steps below to reset them.
2. When “Restore all settings to defaults” displays, select “Yes”.
Settings after reset
• Password:Not set
• Panel operation lock:OFF
1.5.1.3 Forced Power OFF
For WP-4540/4530/4520/4510/4020/4010 series, the power can be turned off forcibly by the following panel
operation. If the power is turned off forcibly, the same process of the normal power-off is executed.
Operation method
1. Press the power button and then stop button, and hold down the buttons for seven seconds or more.
2. When the LCD display changes, release the buttons.
1.5.1.4 Printer Status Sheet
WP-4540/4530/4520/4510/4020/4010 series print the printer status sheet by the following operation.
Table 1-12. Status Sheet
ModelProcedure
WP-4540/4530/4520/4510 series1. Press the setup button.
2. Select “Print Status Sheet” from the setup menu.
3. Press the start button.
WP-4020/4010 seriesTurn the power on while pressing the paper feed/eject button.
Note : When printing the network status sheet to check the network information, follow the procedure below.
WP-4540/4530/4520/4510 series:Select “Wi-Fi/Network Settings” - “Confirm Wi-Fi/Network Settings”, and press or
WP-4020/4010 series:Press the “network status sheet” button. (See
(
(
. (See "1.5.1.1 Setup Menu Configuration (WP-4540/4530/4520/4510 series only) (p22)".)
"1.4.1 Operation Buttons & LEDs (p14)"
(
(
.)
Product descriptionVarious Settings24
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CHAPTER 2
OPERATING PRINCIPLES
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Epson WP-4540/4530/4520/4510/4020/4010 seriesRevision A
A#3
A#2
A#1
A#152
A#151
A#150
B#152
B#151
B#150
B#3
B#2
B#1
C#3
C#2
C#1
C#152
C#151
C#150
D#152
D#151
D#150
D#3
D#2
D#1
E#3
E#2
E#1
E#152
E#151
E#150
F#152
F#151
F#150
F#3
F#2
F#1
G#3
G#2
G#1
G#152
G#151
G#150
0.169 mm
1/150 inch)
5.9267 mm
(35/150 inch
)
2.3707 mm
(14/150 inch)
)
0.0423 mm
1/600 inch)
)
0.0847 mm
1/300 inch)
)
BlackCyanMagenta
Yellow
Column A
Carriage movement direction
Paper feed direction
Column B
Column C
Column D
Column E
Column FColumn G
2.1 Overview
In this manual, the product name is abbreviated to such as “WP-4510 series”, however, the
last digit of the actual name may differ. Identify your product with the first three digits and
refer to the appropriate sections in this manual.
This chapter describes the operating principles of WP-4540/4530/4520/4510/4020/4010 series printer
mechanism.
2.2 Printhead
This section describes the printhead.
Print method:On-demand inkjet
(F7-Mach Turbo 2)
Nozzle configuration
ColorBk, C, M, Y (4 colors)
Number of nozzles1064 nozzles (Bk: 152 nozzles x 4, C, M, Y: 152 nozzles per color)
Nozzle pitch0.169 mm (1/150 inch)
The nozzle layout as seen from behind the Printhead is shown below.
Operating PrinciplesOverview26
Figure 2-1. Nozzle Layout
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Epson WP-4540/4530/4520/4510/4020/4010 seriesRevision A
A
Printhead
1
2
4
3
5
6
C
B
2.3 Motors and Sensors
The following table lists the motors and sensors of WP-4540/4530/4520/4510/4020/4010 series.
Printer Mechanism
Table 2-1. List of Motors & Sensors (Printer Mechanism)
MechanismMotor or SensorNo.
Printhead---
Carriage mechanismCR MotorA
CR Encoder1
PW Sensor2
Cover Open Sensor3
Ink supply mechanismDecompress Pump MotorB
Paper loading/feed mechanismPF MotorC
PF Encoder4
PE Sensor5
Paper Stopper Lever Sensor6
Figure 2-2. Motors & Sensors (Printer Mechanism)
Operating PrinciplesMotors and Sensors27
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Epson WP-4540/4530/4520/4510/4020/4010 seriesRevision A
1
A
A
1
2
3
Scanner (WP-4540/4530/4520/4510 series only)
Table 2-2. List of Motors & Sensors (Scanner)
MechanismMotor or SensorNo.
Scanner mechanismScanner MotorA
CIS Unit1
Figure 2-3. Motors & Sensors (Scanner)
ADF (WP-4540/4530/4520 series only)
Table 2-3. List of Motors & Sensors (ADF)
MechanismMotor or SensorNo.
ADF mechanismADF MotorA
PE Sensor1
Document Sensor2
ADF Encoder3
Figure 2-4. Motors & Sensors (ADF)
Operating PrinciplesMotors and Sensors28
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Epson WP-4540/4530/4520/4510/4020/4010 seriesRevision A
A
1
2
2nd cassette
This unit is installed for WP-4540 series, and option for WP-4530/4520/4510/4020/4010 series.
Table 2-4. List of Motors & Sensors (2nd Cassette)
MechanismMotor or SensorNo.
2nd cassetteASF MotorA
Paper Stopper Lever Sensor1
ASF Encoder2
Figure 2-5. Motors & Sensors (2nd Cassette)
Operating PrinciplesMotors and Sensors29
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Epson WP-4540/4530/4520/4510/4020/4010 seriesRevision A
PF MotorPF Timing Belt
Left side of Printer Mechanism
PF Encoder
With cover
Without cover (light-emitting
and receiving devices)
PF Encoder
Light passes
Light does not pass
PF Scale
2.4 Optical Sensor Control
WP-4540/4530/4520/4510/4020/4010 series uses the optical sensor to control itself. The following describes the
operating principles of optical sensor control.
Control method
To ensure accurate printing, each part must be controlled to make an adequate amount (time) of movement. The
optical sensors read the amount (time) of movements as follows to printer to control it for achieving accurate printing.
1. Rotates the motors for control of the printer, and transmits drive force to the each part via the gear or the
timing belt.
2. The encoder reads the drive amount of each part from the scale one by one to printer to monitor that the part
drives for an adequate amount (time).
Controlled parts
The following table lists where the optical sensor control is used.
Table 2-5. Controlled Parts
ItemMotorScaleEncoderTransmission method
Paper feed/load mechanism
PF MotorPF ScalePF Encoder
Front ASF mechanism
(1st cassette)
Rear ASF mechanism
Carriage mechanismCR MotorCR ScaleCR EncoderCR Timing Belt
Front ASF mechanism
(2nd cassette
ADF mechanism
Note *1: Installed on WP-4540 series, and option for WP-4530/4520/4510/4020/4010 series.
*1
)
*2
*2: WP-4540/4530/4520 series only.
ASF MotorASF ScaleASF EncoderGear
ADF MotorADF ScaleADF EncoderGear
Operating principles
The following describes the paper feed mechanism drive control as an example of the actual operation for the
optical sensor.
The PF scale consists of light-passing and light-blocking portions on its surface, and runs through the slit between
the encoder’s light-emitting and light-receiving devices. While the printer is operating, the encoder always emits
light from light-emitting device toward the light-receiving device, and the light-receiving device detects light when
the light is transmitted through the light-passing portion of the scale, and does not detect light when the light is
blocked by the light-blocking portion of the scale. According to the counts of light-detected and non detected times,
the printer controls paper feed drive direction and amount.
When the encoder cannot read light-emitting/blocking counts correctly due to the misalignment, broken or
contaminated scale, paper jam, foreign object and increasing a load, the fatal error occurs and the printer stops.
PF Timing Belt
ASF Timing Belt
Figure 2-6. PF Drive Control Section
Operating PrinciplesOptical Sensor Control30
Confidential
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