Epson EPL-5700 User manual

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EPSON EPL-5700
4009173
®

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.
 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 © 1996 SEIKO EPSON CORPORATION. Printed in Japan.

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. NOWORK SHOULD BE PERFORMED ON THE UNIT BY PERSONS UNFAMILIER 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.
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 NONAPPROVED COMPONENTS MAY DAMAGE THE PRODUCT AND VOID ANY APPLICABLE EPSON WARRANTY.

PREFACE
This manual describes basic functions, theory of electrical and mechanical operations, maintenance and repair procedures of EPL-5700. 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. The
chapters are organized as follows:
CHAPTER 1. PRODUCT DESCRIPTIONS
Provides a general overview and specifications of the product.
CHAPTER 2. OPERATING PRINCIPLES
Describes the theory of electrical and mechanical operations of the product.
CHAPTER 3. TROUBLESHOOTING
Provides the step-by-step procedures for troubleshooting.
CHAPTER 4. DISASSEMBLY AND ASSEMBLY
Describes the step-by-step procedures for disassembling and assembling the
product.
CHAPTER 5. ADJUSTMENTS
Provides Epson-approved methods for adjustment.
CHAPTER 6. MAINTENANCE
Provides preventive maintenance procedures and the lists of Epson-approved
lubricants and adhesives required for servicing the product.
APPENDIX
Provides the following additional information for reference:
• Connector pin assignments
• Electric circuit boards components layout
• Exploded diagram
• Electrical circuit boards schematics

REVISION STATUS
Rev. Date Page(s) Contents
A 1998/05/06 All First release

TABLE OF CONTENTS
PRODUCT DESCRIPTION
1.1 FEATURES.................................................................................................................................................................1-1
1.2 PAPER SPECIFICATION ...........................................................................................................................................1-6
1.3 PANEL OPERATION..................................................................................................................................................1-8
1.3.1 Power Switch .................................................................................................................................................................................. 1-8
1.3.2 Control Panel .................................................................................................................................................................................. 1-8
1.3.2.1 Switches................................................................................................................................................................................ 1-8
1.3.2.2 Lights..................................................................................................................................................................................... 1-8
1.3.3 List of Panel Setting ....................................................................................................................................................................... 1-9
1.3.4 Special(alternative) Operation..................................................................................................................................................... 1-13
1.3.4.1 Operation at Power On........................................................................................................................................................ 1-13
1.3.4.2 Up-dating ROM Program..................................................................................................................................................... 1-14
1.4 OPTIONS AND CONSUMABLE...............................................................................................................................1-15

OPERATING PRINCIPLES
2.1 OPERATING PRINCIPLES OF MECHANISM............................................................................................................2-1
2.1.1 Overview.......................................................................................................................................................................................... 2-1
2.1.2 Paper Path....................................................................................................................................................................................... 2-2
2.1.3 Paper Feed Mechanism.................................................................................................................................................................. 2-3
2.1.3.1 Paper Feed Operation........................................................................................................................................................... 2-3
2.1.3.2 Paper Empty Sensor................................................................................................................................................................2-4
2.1.4 Second Paper Feed Unit(Option)......................................................................................................................................................2-4
2.1.4.1 Mechanism...............................................................................................................................................................................2-4
2.1.4.2 Paper Empty Sensor................................................................................................................................................................2-5
2.1.4.3 Cassette Type Sensor..............................................................................................................................................................2-5
2.1.5 Laser Exposure..................................................................................................................................................................................2-6
2.1.5.1 Sub Scanning Direction(Vertical scanning direction)................................................................................................................2-6
2.1.5.2 Main Scanning Direction(Horizontal scanning direction)..........................................................................................................2-7
2.1.5.3 Printable Area ..........................................................................................................................................................................2-7
2.1.6 Charging Process..............................................................................................................................................................................2-7
2.1.6.1 Overview (Refer to Figure2-9 on the next page)......................................................................................................................2-7
2.1.6.2 Cleaning OPC drum.................................................................................................................................................................2-8
2.1.7 Developing .........................................................................................................................................................................................2-9
2.1.7.1 Overview ..................................................................................................................................................................................2-9
2.1.7.2 Function of each parts in the development part.......................................................................................................................2-9
2.1.8 Transfer Process .............................................................................................................................................................................2-10
2.1.8.1 Overview ................................................................................................................................................................................2-10

2.1.9 Fusing Process................................................................................................................................................................................2-11
2.1.9.1 Overview ................................................................................................................................................................................2-11
2.1.9.2 Fusing Temperature Control Circuit.......................................................................................................................................2-11
2.1.9.3 Prevention of paper bent from the fusing...............................................................................................................................2-12
2.1.10 Paper Eject.....................................................................................................................................................................................2-13
2.1.10.1 Face up/Face down disengage mechanism.........................................................................................................................2-13
2.2 ELECTRIC CIRCUIT...................................................................................................................................................2-14
2.3 CONTROLLER OPERATING PRINCIPLES...............................................................................................................2-16
TROUBLESHOOTING
3.1 OVERVIEW...................................................................................................................................................................3-1
3.2 ELECTRIC CHECK POINT...........................................................................................................................................3-1
3.2.1 Rating of Power Fuse F1...................................................................................................................................................................3-1
3.2.2 Coil Resistance of Main Motor..........................................................................................................................................................3-1
3.2.3 Checking Sensors .............................................................................................................................................................................3-2
3.3 PRINTER CONDITION .................................................................................................................................................3-3
3.3.1 Indication............................................................................................................................................................................................3-3
3.3.1.1 “Status” Conditions...................................................................................................................................................................3-3
3.3.1.2 “Error” Conditions.....................................................................................................................................................................3-4
3.3.1.3 “Warning” Conditions ...............................................................................................................................................................3-6
3.3.1.4 Service Req. Error....................................................................................................................................................................3-7
3.3.2 Paper Jam Sensor .............................................................................................................................................................................3-9
3.3.2.1 Overview ..................................................................................................................................................................................3-9
3.3.2.2 Paper Jam Sensor Conditions..................................................................................................................................................3-9
3.3.2.3 Resetting the Paper Jam..........................................................................................................................................................3-9

3.4 TROUBLESHOOTING................................................................................................................................................3-10
3.4.1 Handling Paper Jam ........................................................................................................................................................................3-10
3.4.1.1 Paper Jam at power on..........................................................................................................................................................3-10
3.4.1.2 Paper Jam at Paper Feed and Transporting..........................................................................................................................3-10
3.4.2 Troubleshooting for Abnormal Operations ...................................................................................................................................3-11
3.4.2.1 Abnormal Laser......................................................................................................................................................................3-11
3.4.2.2 Abnormal Polygon Motor........................................................................................................................................................3-11
3.4.2.3 Abnormal Fusing....................................................................................................................................................................3-11
3.4.2.4 Power can not be turned on...................................................................................................................................................3-11
3.4.3 Troubleshooting Print Quality Problems.......................................................................................................................................3-12
3.4.4 Horizontal Lines...............................................................................................................................................................................3-14
DISASSEMBLY AND ASSEMBLY
4.1 OVERVIEW...................................................................................................................................................................4-1
4.1.1 Precaution for Disassembly and Assembly.....................................................................................................................................4-1
4.1.2 Recommended Tools ........................................................................................................................................................................4-2
4.1.3 Specification for Screws...................................................................................................................................................................4-2
4.1.4 Work Completion Check ...................................................................................................................................................................4-2
4.2 DISASSEMBLY PROCEDURE.....................................................................................................................................4-3
4.2.1 Preparation Before Disassembly......................................................................................................................................................4-4
4.2.2 Right Cover Removal.........................................................................................................................................................................4-5
4.2.3 Paper Feed Roller Removal ..............................................................................................................................................................4-6
4.2.4 Paper Empty Sensor Removal(PE1).................................................................................................................................................4-6
4.2.5 ROM(C215PROG-B) Exchange.........................................................................................................................................................4-7
4.2.6 Control Panel Removal......................................................................................................................................................................4-8
4.2.7 Front Cover Removal.........................................................................................................................................................................4-9

4.2.8 Interlock Switch Removal ...............................................................................................................................................................4-10
4.2.9 Main Control Board Removal..........................................................................................................................................................4-11
4.2.10 Left Cover Removal.......................................................................................................................................................................4-12
4.2.11 Print Head Unit Removal...............................................................................................................................................................4-13
4.2.12 Paper Feed Roller Unit Removal ..................................................................................................................................................4-14
4.2.13 Paper Feed Solenoid Removal .....................................................................................................................................................4-15
4.2.14 Top Cover Removal.......................................................................................................................................................................4-16
4.2.15 Rear Cover Removal......................................................................................................................................................................4-17
4.2.16 Fusing Unit Removal.....................................................................................................................................................................4-18
4.2.17 Disassembling the Fusing Unit ....................................................................................................................................................4-19
4.2.17.1 Heater Lamp Removal .........................................................................................................................................................4-19
4.2.17.2 Thermister, Thermostat Removal.........................................................................................................................................4-21
4.2.17.3 Paper Eject Sensor(PS3).....................................................................................................................................................4-22
4.2.18 Transfer Roller Exchange .............................................................................................................................................................4-23
4.2.19 Power Board Removal...................................................................................................................................................................4-24
4.2.20 High Voltage Board Removal........................................................................................................................................................4-26
4.2.21 Paper Sensor(PS1) Removal.........................................................................................................................................................4-27
4.2.22 Main Motor Removal......................................................................................................................................................................4-27
4.2.23 Driving Unit Removal.....................................................................................................................................................................4-28
4.3 DISASSEMBLY AND ASSEMBLY FOR OPTIONAL SECOND PAPER FEED UNIT.................................................4-29
4.3.1 Second Paper Feed Roller Exchange ............................................................................................................................................4-29

ADJUSTMENT
5.1 ADJUSTMENT..............................................................................................................................................................5-1
5.1.1 Interlock Switch Position Adjustment..............................................................................................................................................5-1
MAINTENANCE
6.1 MINTENANCE..............................................................................................................................................................6-1
6.1.1 User Maintenance..............................................................................................................................................................................6-1
6.1.2 Service Maintenance .........................................................................................................................................................................6-1
APPENDIX
7.1 CONECTOR PIN ASSIGMENTS ..................................................................................................................................7-1
7.2 CIRCUIT BOARD COMPONENT LAYOUT..................................................................................................................7-6
7.3 EXPLODED DIAGRAM.................................................................................................................................................7-7
7.4 CIRCUIT DIAGRAM....................................................................................................................................................7-17

PRODUCT DESCRIPTION
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EPL-5700 Chapter1 Product Description
Rev. A 1-1
1.1 FEATURES
EPL-5700 is a small and compact A4 size page printer that semiconductor
laser beam scanning is applied for. Following shows features.
Figure 1-1. Exterior View
PROCESS SPECIFICATION
 Method: Dry mono-component xerographic method
 Light source: Semiconductor laser
 Photoelectric unit: OPC drum(organic photoconductor)
 Charge: Rotating brush charging type
 Developer: Exposed section developer system
 Toner: Mono-component nonmagnetic toner
 Transfer method: Roller transfer
 Fixing: Heat roller system
 Density regulator: Developer bias variation system(user can regulate)
PRINT SPEED
 Resolution: 600 dpi
 Print Speed: 8ppm(A4/LTR/B5/A5),
6.9ppm(legal)
*1:Same with optional cassette
*2:Regarding printing with custom size(non-standard
size)paper, the printing speed will become faster
because cleaning takes place automatically.
 First print: 19 seconds(A4/LTR), 18.2 seconds(B5)
17.3 seconds(A5), 20.2 seconds(legal)
 Warm-up time: 20 seconds or less (at 23 degree Celsius, standard
voltage)
PRINTABLE AREA
 Print area Area within margins of 4mm from each side.
(Refer to Figure 1-2)
Note) The printable area may change depending on
the print mode.
Printable Area
4mm
4mm
4mm
4mm
Figure 1-2. Printable Area

EPL-5700 Chapter1 Product Description
Rev. A 1-
2
PAPER HANDLING
Table 1-1. Paper Handling
Paper supply
method Capacity Supplied paper size Permissible paper thickness
Multipurpose tray 150
sheets*1 Standard paper types are those that fall
within the range of
those usable sizes
given below.
76.2 x 127∼215.9
x355.6 mm
(A4, JIS-B5,A5,
Letter, Government
letter, Executive,
Legal, Government
Legal, F4, Half
Letter) or Custom
size (optional size
that falls within the
range of standard
paper sizes)
Normal paper 60
to 90g/m2 (16 to
24lb)
50sheets
20sheets
Japanese official
post card*2
Japanese official
post card*2
(when printing on
back)
Special paper
190g/m2
10
sheets Envelopes Monarch, C10, DL,
C5,C6
International-B5
Labels/OHP/thick
pages
Normal paper 60
to 90g/m2(16 to
24lb)
Thick paper 90 to
157 g/m2
Special paper
(labels, OHP)
Note) *1 For 20lb(75g/m2) paper.
*2 When printing on the back file of the paper using manual printing,
since the paper may curl, a maximum of 20 pages can be set.
Table 1-2. Paper Handling (Cont.)
Paper supply
method Capacity Supplied paper size Permissible paper thickness
Manual Feed slot*4 1 sheet Standard or
Custom paper
sizes that fall
within the range of
usable sizes given
below.
100x148∼215.9x
355.6 mm
Normal paper 60 to
90g/m2(16 to 24lb)
Thick paper 90 to
157g/m2
Special paper
(labels, OHP)
Lower cassette
*1,*5 500 sheets*1 A4, LG, LT Normal paper 60 to 90g/m2
(16 to 24lb)
Note) *1: For 20lb(75g/m2) paper.
*4: Manually fed papers are inserted one page at a time above the
cover of the paper tray.
*5: Cassette trays can be used for each of the standard paper sizes.
The maximum size of the paper supply including the paper tray is
650 sheets.
CONSUMABLES
 Name: Developer and Toner cartridge
Organic Photoconductor Unit
 Life1* Developer equipment
(Black colored mono component nonmagnetic toner:
Average 6000 sheets.)
OPC drum(organic photo conductor unit):20000
sheets.
Note 1*) These number represent the number of printed pages that can be
printed assuming continuous printing on an A4 page with print duty of 5%.
The life will change based on the print duty and method of printing
(continuous printing, intermittent printing, printing density, toner
economizing)

EPL-5700 Chapter1 Product Description
Rev. A 1-
3
CONTROLLER SPECIFICATION
 CPU RISC VR4300 100MHz
 RAM Standard 4MB(EDO type)
SIMM option: 1
32MB, 16MB, 8MB, 4MB (EDO type, 1 slot)
Maximum 36MB(4MB(standard) + 32MB(expansion
SIMM slot)
 ROM Font: 2Mbytes(mounted on main board)
Program: 4Mbytes (mounted on ROM DIMM board)
 Host interface Standard, Centronics, Bi-direnctional parallel
IEEE-1284 nibble
ECP
RS232C Serial
Type-B I/F: 1 slot
SOFT SPECIFICATION
 Control Code Bi-direction EJL
 Emulation ESC/Page mode
PCL5E mode
GL/2 mode
FX mode
ESC/P2 mode
I239x
Post Script level 2(Option)
ENVIRONMENTAL CONDITION
[Usage conditions including expendable parts]
 Temperature: 10 to 35 °C
 Humidity: 15% to 85% without condensation
 Air pressure(altitude): 760hPa or more(2500 meters or less)
 Surface angle: 1 degree incline or less (for both front
to rear and side to side)
 Luminosity: 3000 lux or less(not exposed to direct
sunlight)
[Environmental conditions for storage and transportation]
Normal 0 to 35 °C
Temperature Extremes
(1/3 of total High 35 to 40 °C
holding period) Low -20 to 0 °C
Normal 30 to 85%
Humidity Extremes
(1/3 of total High 85 to 95%
holding period) Low 10 to 30%
Holding Period 18 months after
manufacture
 Shipping Air Pressure: 460 to 760 hPa
 Resistance to shock: For JIS Z0200 1987 Level 1 with no
abnormalities.
Dropping direction: 1 corner, 6 sides, 3 edges

EPL-5700 Chapter1 Product Description
Rev. A 1-
4
ELECTRICAL SPECIFICATION
 Power supply:
 120 model
120V +/- 10%, 50-60Hz +/-3Hz
 200V model
220 to 240V +/- 10%, 50-60Hz +/- 3Hz
 Electrical characteristic
1) AC line noise: Pulse width: 50 to 1000 ns
Pulse polarity: ±
Repeat: non-simultaneous
Modes: common/normal
Voltage: 1kv
However, the parts can withstand up to 2kv without damage.
2) Instant cutoff: DIP 100%(for standard voltage-10%) for one
cycle with normal print quality.
3) Electrostatic durability:
up to ±10kv: no hardware errors
no unrecoverable software errors for the operator
up to ±15kv: without damage to components
4) Rush current: 1/2 cycle, 50A or less
5) Insulation resistance: 10 M Ωor less
6) Dielectric strength: Assuming the following voltages are input for
one minute with no breakdowns.
120V model: AC 1000V(duration of one
surge)
200V model: AC1500V(duration of one
surge)
7) Leakage current: 3.5mA or less (120V model)
3.5mA or less (200V model)
DIMENSIONS
 Dimensions: Main unit 397(W)mm x 463(L)mm x251(H) mm
 Weight: Approximately 7.5Kg(not including expendable or
optional parts)
RELIABILITY AND DURABILITY
 Product life Approximately 180000 printed pages or five years,
whichever comes first.
 MPBF: 25000 sheets or more
Note) This is the average number of sheets before a breakdown will
occur that either requires the change of parts or for which the user is
unable to resolve.
 MTBF: 3000 hrs(10 months) or more
 Paper Feed Reliability(for recommended paper or normal paper)
 Jam rate: 1/2000 or less(not including multiple pages)
 Misfeed: 1/2000 or less
 Multiple page feed rate: 1/500 or less
 Paper wrinkling: 1/1000 or less
 Paper leading edge folds: 1C or more, 1/1000 or less
Instances of only 1C excluded*1
Note) *1: 1C signifies a corner folded
1mm.

EPL-5700 Chapter1 Product Description
Rev. A 1-
5
APPLICABLE CERTIFICATION STANDARDS AND REGULATIONS
The specification of this engine meet the certification standards and
regulations below. There are cases in which the standards and regulations
that apply differently to products, including the controller, depending on their
destination.
[Safety Standards]
Table 1-3. Safety Standards
Model Name Applicable certification
120V model UL 1950
CSA 22.2 No.950
200V model TÜV-GS(EN60950)
NEMKO(EN60950)
[Safety Regulations]
Table 1-4. Safety Regulations
Model Name Applicable certification
120V model FDA(NCDRH) Class 1
200V model TÜV-GS(EN60825)
NEMKO(EN60825)
[EMC]
Table 1-5. EMC
Model Name Applicable certification
100V model CNS 13438
CISPR22(Taiwan)
FCC Part15 Subpart B Class B/CSA
C108.8 Class B
200V model EC EMC Directive 89/336/PEC
EN55022 Class B
EN61000-3-2
EN61000-3-3
EN50082-1
AS 3548(Australia)
 Power consumption: In compliance with international Energy
Star standards.
 Others:
 Toner: Do not effect on human body(in
accordance with OSHA, TSCA,
EINECS and CSCL)
 OPC: Does not effect human body(in
accordance with OSHA)
 Ozone emissions: Conforms to UL 478, 5th version.
 Materials: Conforms to Swiss environmental
protection laws(does not include CdS)
 Ozone: 0.02 ppm or less.
 Potential toxicity: OPC, toner, and plastic parts are
nontoxic.
 Noise: Stand-by 30 dB(A) or less.
In operation, 47.0 dB(A) or less.

EPL-5700 Chapter1 Product Description
Rev. A 1-
6
POWER CONSUMPTION
 Power consumption
120V model 220-240V model
Standard Maximum current 5.3A 3.0A
Power
consumption Maximum(during warming up) 580W 580W
Average during continuous printing Less than
200W Less than 210W
Standby mode
(average) heater on Less than 40W Less than 40W
heater off*1 Less than
15W Less than 15W
Note) *1 Energy star compliment.
 Resistance to vibration: Vibration frequency, 5 to 100Hz, 100 to 5 Hz.
Acceleration:1G
Cleaning time:10 minutes(one way)
Added vibration direction: 3 directions
Added vibration time: 60 minutes in each
direction X,Y, and Z, for 180 minutes total.
 Output paper: Face-down-maximum 100 sheets (for 20lb. (75g/
m2)paper)
Face up-maximum 20 sheets(for 20lb. (75g/m2) paper,
when using the optional face up tray)
Use the lever on the right side of the printer to switch
the front and rear sides of the paper when changing
the face up orientation.
1.2 PAPER SPECIFICATION
Useable paper types are mentioned below.
PAPER TYPES
 Normal Paper 60g/m2 to 90g/ m2(16 lbs. to 24 lbs.)
Copy, bond, and recycled paper in general use.
 Special Paper Labels, Japanese official post cards, OHP film, Color
paper, thick paper(90 to 157 g/ m2), special DTP
paper, letterhead.
Note) Ibs:ream weight= ib./500 pages/17x22 g/m2:1g/m2=0.2659763 lbs.
CAUTION


The paper type listed below can not be used with
this printer. They will result in bad printouts,
paper jams, and can damage the printer.
•• Carbon paper, non-carbon paper, thermal
transfer paper, impact paper, acidic paper.
•• Paper that has gone through a thermal transfer
or ink-jet printer.
•• Paper that is too thick or too thin.
•• Wet(damp) paper.
•• Paper to which a special coating has been
applied, or colored paper that has gone through
surface process.
•• Paper that has been lubricated(too smooth or
slippery), too rough, or whose texture is
different on the front and back.
•• Paper with holes for binders or perforations.
•• Folder, curled, or damaged paper.
•• Paper of irregular shape or not cut with right
angles.
•• Paper with labels that come off and stick easily.
•• Paper with glue, staples, or paper clips attached.