Epson Stylus Scan 2000 User manual

®
SEIJ99006
SERVICE MANUAL
EPSONSTYLUSScan2000
All-in-one printer, scanner, and copier
®

EPSON STYLUS Scan 2000 Revision B
2
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 © 1999 SEIKO EPSON CORPORATION. Printed in Japan.

EPSON STYLUS Scan 2000 Revision A
3
PRECAUTIONS
Precautionary notations throughout the text are categorized relative to 1) Personal injury and 2) damage to equipment.
DANGER
1. ALWAYSDISCONNECTTHEPRODUCTFROMTHEPOWERSOURCEAND PERIPHERALDEVICESPERFORMINGANYMAINTENANCEORREPAIR
PROCEDURES.
2. NOWORK 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.
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 MADE BY THE MANUFACTURER; INTRODUCTION OF SECOND-SOURCE ICs
OR OTHER NONAPPROVED COMPONENTS MAY DAMAGE THE PRODUCT AND VOID ANY APPLICABLE EPSON WARRANTY.
W ARNING
Signals a precaution which, if ignored, could result in
damage to equipment.
CAUTION
Signals a precaution which, if ignored, could result
in damage to equipment.

EPSON STYLUS Scan 2000 Revision A
4
PREFACE
This manual describes basic functions, theory of electrical and
mechanical operations, maintenance and repair procedures of
EPSON STYLUS Scan 2000. The instructions and procedures
includedhereinare intendedfor the experiencedrepairtechnicians,
and attention should be given to the precautions on the preceding
page. The chapters are organized as follows:
CHAPTER 1. “Product Description”
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 step-by-step procedures for troubleshooting.
CHAPTER 4. “Disassembly & Assembly”
Describes step-by-step procedures for disassembling and assembling the prod-
uct.
CHAPTER 5. “Adjustment”
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.
CHAPTER 7. “Appendix”
Provides the following additional information for reference:
• EEPROM Address Map
• Connector Pin Assignment
• Schematics
• Circuit Diagrams

EPSON STYLUS Scan 2000 Revision A
5
Revision Status
Revision Issued Date Description
Revision A October 4, 1999 Full version
Revision B October 20, 1999 Changed Disassembly and Troubleshooting to account for ASP blue
protective tape, also fixed scanner removal description

EPSON Stylus Scan 2000 Revision A
6
Contents
Product Description
Features......................................................................................................... 9
General Specifications ............................................................................... 10
Local copy.............................................................................................. 10
Scan area................................................................................................ 10
Print area................................................................................................ 11
Printer..................................................................................................... 12
Scanner .................................................................................................. 15
Common................................................................................................. 16
Interfaces..................................................................................................... 17
Printer interface..................................................................................... 17
Scanner interfaces................................................................................. 22
Control Panel............................................................................................... 23
Buttons................................................................................................... 23
Control panel indicates the printer’s condition................................... 25
Initialization............................................................................................ 26
Stylus Scan Errors ...................................................................................... 28
Physical Characteristics.............................................................................. 29
Dimensions............................................................................................ 29
Weight.................................................................................................... 29
External view ......................................................................................... 29
Operating Principles
General........................................................................................................ 31
Printer Mechanism Operation ................................................................... 32
Printing Mechanism.............................................................................. 33
Printing Process..................................................................................... 34
Carriage Mechanism............................................................................. 35
Paper Feeding Mechanism................................................................... 37
Ink System ............................................................................................. 42
Pump, Carriage Lock, Head Cleaner Mechanism................................ 43
Scanner Mechanism Operation................................................................. 46
Mechanism ............................................................................................ 46
Local and PC-Centric Copy Principles....................................................... 47
Local copy process................................................................................ 47
PC-Centric copy process....................................................................... 47
Electrical Circuit Operating Principles ...................................................... 49
B101 PSB/PSE Board............................................................................. 50
B101 MAIN Board.................................................................................. 53
Troubleshooting
Unit Level Troubleshooting....................................................................... 57
Printer/Scanner does not operate at power on................................... 58
Error is detected .................................................................................... 59
Failure occurs during printing.............................................................. 59
Printer does not feed paper correctly.................................................. 60
Control panel operation is abnormal................................................... 60
Repair of the Printer Mechanism .............................................................. 61
Troubleshooting the Scanner.................................................................... 65
Scanner Troubleshooting Flowcharts.................................................. 65
Scanner troubleshooting check points................................................ 66
Troubleshooting the Motors and Sensors ............................................... 69

EPSON Stylus Scan 2000 Revision A
7
Disassembly & Assembly
Overview ..................................................................................................... 71
Precautions for Disassembling the Printer.......................................... 71
Tools....................................................................................................... 72
Screw Numbering System and Specifications ................................... 73
Service Checks After Repair ................................................................. 74
Disassembly Procedures............................................................................ 76
Removing the Housing ......................................................................... 77
Removal of printer consumables......................................................... 81
Removing the Circuit Board Tray......................................................... 84
Removing the Scanner Mechanism..................................................... 88
Disassembling the Printer Mechanism................................................ 94
Adjustment
Required Adjustments.............................................................................. 108
Adjustment Tools Required................................................................ 110
Printer Adjustment ................................................................................... 110
Printer hardware adjustments............................................................ 111
Using the Service-Adjustment Program................................................. 113
Installing the program......................................................................... 113
Opening the Start-up menu................................................................ 114
Initial Ink Charge Operation................................................................ 119
Bi-D Adjustment .................................................................................. 120
Head Cleaning Operation.................................................................... 121
Head Voltage ID Input ......................................................................... 122
Head Angular Adjustment .................................................................. 123
Ink draining.......................................................................................... 125
Scanner Adjustment................................................................................. 125
Maintenance
Printer-Related Maintenance................................................................... 127
Cleaning .................................................................................................... 128
Exterior................................................................................................. 128
Inside.................................................................................................... 128
Lubrication ................................................................................................ 129
Printer Mechanism.............................................................................. 129
Appendix
Connector Summary................................................................................ 138
Board Connector Summary................................................................ 139
Connector Pin Assignment................................................................. 140
EEPROM Address Map............................................................................. 143
Exploded Diagrams.................................................................................. 148
Parts List.................................................................................................... 155
Component Layout................................................................................... 160
Circuit Diagrams....................................................................................... 165

CHAPTER
1
PRODUCTDESCRIPTION

EPSON Stylus Scan 2000 Revision A
Product Description Features 9
1.1 Features
The major features of the EPSON Stylus Scan 2000 are:

High Color Print Quality

1440 (H) X 720 (V) dpi printing

Four Color Printing (CMYK)

Traditional and New Microweave

Sheet-fed 300dpi scanning

High quality local copy
One color copy mode Text & Graphics
Two B&W copy modes Black & White, Grayscale

High speed local copy
Color normal mode copy Max. 1.2 PPM
Gray mode copy Max. 1.3 PPM
B/W normal mode copy Max. 3.0 PPM

Local copy settings from the control panel
Enlargement 141%
Reduction 93%, 70%
Copy size protection Letter/Half Letter/5 x 8”/Legal
A4/B5/A6
(Copysizeprotection prevents theprintheadfromfiring inkonto the platen
in cases where the loaded paper size does not match the paper size
selected in the software.)

Built-in Auto Sheet Feeder

Holds 100 cut-sheets (64g/m
2
)

Holds 10 envelopes

Holds 30 transparency films

Two Built-in Interfaces

Bi-directional parallel I/F (IEEE-1284 level 1 device)

USB

Windows/Macintosh exclusive

Copy settings from the computer
Auto Photo Fine
Auto Enlarge
Auto Layout
Background reduction

Installed functions are the same or equivalent to the EPSON Stylus
Color 740 and the GT-2200.

Small footprint 228 x 437 x 279 mm (HWD)

EPSON Stylus Scan 2000 Revision A
Product Description General Specifications 10
1.2 General Specifications
1.2.1 Local copy
1. Local copy
Output mode = data from the scanner ASIC to the printer
2. Enlargement: Default 100%
Enlargement 141%
Reduction 70%, 93%
(not continuous)
3. Copy size Max. copy size 216 x 355.6mm (8.5 x 14inches)
(Top, bottom, and both sides
need 3mm margins)
Copy size protection A4/B5/A6 (A-size version)
Letter/Half Letter/5 x 8”/Legal
(Letter size version)
4. Printing paper size Normal paper A4/Letter
Photo paper A4/Letter
1.2.2 Scan area
Figure 1-1. Scan Area
Table 1-1. Local Copy Specifications
Mode Scan
res. Output mode Print res. Micro Weave Variable dot Head seq. Media
B/W B/W 300x300 Line art 360x360 Off No Bi-D Normal
Grayscale 300x300 Gray 360x360 On No Bi-D Normal
Color Text &
Graphics 300x300 Full
color 360x360 On No Bi-D Normal
Table 1-2. Scan Area
Document
size PW (width) PL (length) LM (left) RM (right) TM (top) BM (bottom)
A4 210mm 297mm at least
3mm at least 3mm at least 3mm at least 3mm
Letter 216mm 355.6m
mat least 3mm at least 3mm at least 3mm at least 3mm
Scanning Area
Starting scan
position (1st bit)
LM RM
TM
BM
PL
PW Document
edge (scale
edge)

EPSON Stylus Scan 2000 Revision A
Product Description General Specifications 11
1.2.3 Print area
Figure 1-2. Print Area
Printable Area
LM RM
TM
BM
PL
PW Paper feed direction
Table 1-3. Print Area
Size PW PL LM RM TM BM
A4 210mm 297mm at least
3mm at least 3mm at least 3mm at least 3mm
Letter 216mm 279mm at least
3mm at least 3mm at least 3mm at least 3mm
B5 182mm 257mm at least
3mm at least 3mm at least 3mm at least 3mm
Legal 216mm 356mm at least
3mm at least 3mm at least 3mm at least 3mm

EPSON Stylus Scan 2000 Revision A
Product Description General Specifications 12
1.2.4 Printer
PRINTING

Print method Drop On Demand ink jet

Nozzle configuration monochrome 144 nozzles (48 x 3 staggered)
color 48 nozzles each (cyan, magenta, yellow)

Print direction Bi-direction with logic seeking

Print speed & printable columns
CONTROL CODES

ESC/P Raster

EPSON Remote Command
PAPER FEED
1. Feeding method Friction feed with ASF
2. Line spacing 1/6 inch or programmable at 1/360 inch
3. Paper path cut-sheet ASF (front enter, front out)
4. Feed speed 2.36 inch/sec. normal/ continuous
4.5 inch/sec. fast/continuous
Table 1-4. Character mode
Character pitch Printable columns LQ speed
10 CPI (Pica) 80 200 cps
Table 1-5. Raster graphic mode
Horizontal
resolution Printable area Available dots CR speed
180 dpi 8.26 inch 1488 20 IPS
360 dpi 8.26 inch 2976 20 IPS
720 dpi 8.26 inch 5952 20 IPS

EPSON Stylus Scan 2000 Revision A
Product Description General Specifications 13
PAPER

Cut-sheets
size: A4 210(W) x 297mm (L) (8.3 x 11.7”)
Letter 216 x 279mm (8.5 x 11.0”)
B5 182 x 257mm (7.2 x 10.1”)
Legal 216 x 356mm (8.5 x 14.0”)
Statement 139.7 x 215.9mm (5.5 x 8.5”)
Executive 184.2 x 266.7mm (7.25 x 10.5”)
Photo paper 101.6 x 152.4mm (4 x 6”)
thickness: 0.08~0.11mm (0.003~0.004”)
weight: 64g/m
2
~90g/m
2
(17~24lb.)
quality: Exclusive paper, bond paper, PPC

OHP sheets, Glossy paper
size: A4 210(W) x 297mm (L) (8.3 x 11.7”)
Letter 216 x 279mm (8.5 x 11.0”)
thickness: 0.075~0.085mm (0.003~0.0033”)
NOTE: Transparencyprintingisonlysupportedatnormaltemperature.

Envelopes
size: No.10 241(W) x 104.8mm (H) (9.5 x 4.125”)
DL 220 x 110mm (8.7 x 4.3”)
C6 162 x 114mm (6.4 x 4.5”)
thickness: 0.16~0.52mm (0.006~0.02”)
weight: 45g/m
2
~75g/m
2
(12~20lb.)
quality: Exclusive paper, bond paper, Air mail
Figure 1-3. Printable Area for Envelopes
NOTE: Envelope printing is only supported at normal temperature.
Load long edge first.

Index cards
size: A6 index 105(W) x 148mm (L) (4.1 x 5.8”)
A5 index 148 x 210mm (5.8 x 8.3”)
5x8” index 127 x 203mm (5.0 x 8.0”)
10x8” index 254 x 203mm (10.0 x 8.0”)
thickness: less than 0.23mm (0.0091”)
Table 1-6. Envelope Margin
Size Left Margin
(min.) Right Margin (min.) Top Margin (min.) Bottom Margin (min.)
#10 3 mm (0.12”) 28 mm (1.10”) 3 mm (0.12”) 14 mm (0.55”)
DL 3 mm (0.12”) 7 mm (0.28”) 3 mm (0.12”) 14 mm (0.55”)
C6 3 mm (0.12”) 3 mm (0.12”) 3 mm (0.12”) 14 mm (0.55”)
Printable Area
LM RM
TM
BM

EPSON Stylus Scan 2000 Revision A
Product Description General Specifications 14
INK
1. Ink cartridge (black)
Type: Exclusive cartridge
Color: Black
Print capacity: 900 pages/A4 (ISO/IEC 10561 Letter pattern
360dpi)
Ink life: Two years from production date
Storage temperature: -20~40°C (storage, less than a month at 40°C)
-30~40°C (packing storage, less than month at
40°C)
-30~60°C (transit, within 120 hours at 60°C and
within a month at 40°C)
Dimensions: 27.8 (W) x 52.7 (D) x 38.5mm (H)
Figure 1-4. Black Ink Cartridge
2. Ink cartridge (color)
Type: Exclusive cartridge
Colors: Magenta, cyan, and yellow
Print capacity: 300 pages/A4 (360 dpi, 5% duty each color)
Ink life: Two years from production date
Storage temperature: -20~40°C (storage, less than a month at 40°C)
-30~40°C (packing storage, less than month at
40°C)
-30~60°C (transit, within 120 hours at 60°C and
within a month at 40°C)
Dimensions: 42.9 (W) x 52.7 (D) x 38.5mm (H)
Figure 1-5. Color Ink Cartridge
NOTE: Ink cartridges are consumable products and cannot by any
means be refilled.
Do not use cartridges that have passed their expiration date.
Ink will freeze at less than -4°C but can be used after thawing
for three hours at room temperature.
27.8
52.7
38.5
42.9 38.5
52.7

EPSON Stylus Scan 2000 Revision A
Product Description General Specifications 15
INPUT DATA BUFFER
64K bytes
1.2.5 Scanner
Product type Sheet-fed color image scanner (without ADF)
Sub scan method Sheet-fed type
Photoelectric device Color CCD line sensor
Max. scan area 8.5 x 14” (216 x 355.6mm)
Max. effective pixels 2550 x 4220 pixels (300dpi)
Scan resolution main = 300dpi and sub = 300dpi
Output resolution 50~4800 dpi (1dpi increments)
Scan speed (300dpi, Draft mode)
Color = 4.25 msec/line
Monochrome (bi-level) = 1.68 msec/line
Color separation By the CCD color filter
Command level ESC/I - B7
Zoom 50~200% (1% increments)
Pixel depth 8 bits/color (input 12 bits/pixel/color,
output 8 bits/pixel/color)
Gamma correction CRT two levels (A,B)
PRINTER three levels (A,B,C)
User defined = one level
Color correction Impact-dot printer
Thermal printer
Ink-jet printer
CRT display
User defined
Brightness Seven levels
Line art Fixed threshold
TET
Digital halftoning AAS
Error diffusion three modes (A,B,C)
(Bi-level, Quad-level) Dither (resident) four modes (A,B,C,D)
Dither (user defined) two modes (A,B)
Interface USB and IEEE1284.4
Light source White cold cathode fluorescent lamp

EPSON Stylus Scan 2000 Revision A
Product Description General Specifications 16
1.2.6 Common
ELECTRICAL SPECIFICATIONS
Rated voltage AC 120V
AC 220~240V
Input voltage AC 99~132V
AC 198~264V
Rated current 0.6A (AC 120V model)
0.4A (AC 220-240V model)
Rated frequency range 50~60 Hz
Input frequency range 49.5~60.5 Hz
Power consumption Approx. 29W (local copy printing)
Insulation resistance 10M
Ω
at 500V DC
(between AC line and chassis)
SAFETY, EMC
Safety UL1950 (UL)
CSA C22.2 No. 950 (CSA)
EN60950 (VDE)
EMC FCC Part15 Subpart B Class B
CSA C108.8 Class B
AS/NZS3548 Class B
CE Marking Low voltage directive 73/23/EEC EN60950
EMC Directive 89/336/EEC EN55022 Class B
EN61000-3-2
EN61000-3-3
EN50082-1
IEC 801-2/801-3/801-4
ENVIRONMENTAL CONDITIONS
Temperature 10~35°C (operating, see figure below)
-20~60°C (non-operating, in packaging)
One month at 40°C
120 hours at 60°C
Humidity 20~80% RH (operating, without condensation, see
figure below)
5~85% RH (non-operating, in packaging without
condensation)
Figure 1-6. Environment
Resistance to shock 1 G, within one ms (operating)
2 G, within two ms (non-operating, in packaging)
Resistance to vibration0.15G (operating)
0.50G (non-operating, in packaging)
RELIABILITY
Main unit Life 75,000 pages
Lamp Life 15,000 hours
10 27 30 35 40
20
Temperature (°C)
10
20
30
40
90
80
70
60
50
Humidity (%)

EPSON Stylus Scan 2000 Revision A
Product Description Interfaces 17
1.3 Interfaces
Thissectionisdividedintoprinterandscannerinterface specifications.Seethe
following section for printer interface details or see “Scanner interfaces” on
page 22 for scanner interface details.
1.3.1 Printer interface
PARALLEL
BUSY signal is set high before setting either -ERROR low or PE high, and held
high until all these signals return to their inactive state.
BUSY signal is at high level in the following cases:

During data entry (see data transmission timing)

When input data buffer is full

During -INIT signal is at low level or during hardware initialization

During printer error (see -ERROR signal)

When the parallel interface is not selected
ERROR signal is at low level when the printer is in one of the following states:

Printer hardware error (fatal error)

Paper-out error

Paper-jam error

Ink-out error
PE signal is at high level during paper-out error.
1. Specifications
Transmission mode 8 bit parallel, IEEE-1284 ECP compatibility/nibble
mode
Synchronization Refer to the IEEE-1284 specification
Handshaking Refer to the IEEE-1284 specification
Packet Refer to the IEEE-P1284.4 Standard for Data Delivery
and Logical Channels for IEEE Std. 1284 Interface
(Draft D1.50)
Signal level TTL compatible level (IEEE-1284 Level 1 device)
Data trans. timing Refer to the IEEE-1284 specification
2. Connector pin assignment and signals
Table 1-7. Forward channel pin assignments and signals
Pin # Signal Name Return
GND pin In/Out Description
1 -STROBE 19 In The strobe pulse. Read-in data is preformed at the falling edge of this
pulse.
2DATA0 20 In
The DATA0 through DATA7 signals
represent data bits 0 to 7, respectively.
Each signal is high whendata is logical
1 and low when data is logical 0.
3 DATA1 21 In
4DATA2 22 In
5 DATA3 23 In
6DATA4 24 In
7 DATA5 25 In
8DATA6 26 In
9 DATA7 27 In
10 -ACKNLG 28 Out A negative signal that indicates the
printer is ready to accept data
11 BUSY 29 Out A high signal that indicates the printer
is not ready and cannot receive data
12 PE 28 Out A high signal indicates a paper-out
error
13 SLCT 28 Out Always at high level when the printer
is on
14 -AFXT 30 In Not used
31 -INIT 30 In
The falling edge of a negative pulse or
a low signal on this line causes the
printer to initialize. Minimum 50us
pulse necessary.

EPSON Stylus Scan 2000 Revision A
Product Description Interfaces 18
3. Data trans. timing Refer to the IEEE-1284 specification and the
following.
32 -ERROR 29 Out A low signal indicates a printer error
condition
36 -SLIN 30 In Not used
18 Logic H -Out Pulled up to +5V via 3.9KΩ resistor
35 +5V - Out Pulled up to +5V via 3.3KΩ resistor
17 Chassis GND - - Chassis GND
16, 33
19-30 GND - - Signal GND
15,34 NC - - Not connected.
Table 1-8. Reverse channel pin assignments and signals
Pin # Signal Name Return
GND pin In/Out Description
1 HostClk 19 In Data or address information
transferred from host to product.
2DATA0 20 In
The DATA0 through DATA7 signals
represent data bits 0 to 7,
respectively. Each signal is high
when data is logical 1 and low when
data is logical 0.
These signals are used to transfer the
1284 extensibility request values to
the printer.
3 DATA1 21 In
4DATA2 22 In
5 DATA3 23 In
6DATA4 24 In
7 DATA5 25 In
8DATA6 26 In
9 DATA7 27 In
10 PeriphClk 28 Out Data transferred from product to
host.
11 PeriphAck 29 Out Printer busy signal and reverse
channel transfer data bit 3 or 7
12 nAckReverse 28 Out Printer goes to Low and approves
nReverseRequest
Table 1-7. Forward channel pin assignments and signals
Pin # Signal Name Return
GND pin In/Out Description
13 Xflag 28 Out X-flag signal and reverse channel
transfer data bit 1 or 5
14 HostAck 30 In
Host uses this signal for flow control
in reverse direction. Also this signal
offers the data bit 9 that is used to
judge whether the data or command
will be sent on the data signal in
forward direction.
31 nReverseReque
st 30 In This signal goes low to change to the reverse channel.
32 nPeriphRequest 29 Out This signal produces a host interrupt.
36 1284-Active 30 In 1284 active signal, High in ECP mode.
18 Periph-Logic H -Out Always high. Pulled up to +5V via
3.9KΩ resistor
35 +5V - Out Always high. Pulled up to +5V via
1.0KΩ resistor
17 Chassis GND - - Chassis GND
16, 33
19-30 GND - - Signal GND
15,34 NC - - Not connected.
Table 1-8. Reverse channel pin assignments and signals
Pin # Signal Name Return
GND pin In/Out Description

EPSON Stylus Scan 2000 Revision A
Product Description Interfaces 19
Figure 1-7. Data Transmission Timing
* Rise and fall time of every output signal
** Rise and fall time of every input signal
* The Logic H signal goes low, 2.0 V or less, when the printer is turned off and
goes high, 3.0 V or more, when the printer is turned on. The receiver shall
provide an impedance equivalent to 7.5 KΩ to ground.
4. Extensibility Request:
Theprinterrespondsaffirmativelywhentheextensibilityrequestvaluesare
00H or 04H, which mean

00H Request nibble mode reverse channel transfer

04H Request Device ID;
Return data using nibble mode reverse channel transfer
Device ID:
The printer sends the following device ID string when it is requested.
IEEE 1284.4 is enabled,
[00H][5EH]
MFG:EPSON;
CMD:ESCPL2,BDC,D4,SPC;
MDL:Stylus[SP]Scan[SP]2000;
CLS:PRINTER
DES:EPSON[SP]Stylus[SP]Scan[SP]2000;
Note: (1)[00H] denotes a hexadecimal value of zero
(2)MDL value depends on the EEPROM setting.
Table 1-9. Data transmission times
Parameter Minimum Maximum
tsetup 500 ns -
thold 500 ns -
tstb 500 ns -
tready 0 -
tbusy - 500 ns
tt-out* -120 ns
tt-in** - 200 ns
treply 0 -
tack 500 ns 10 us
tnbusy 0 -
tnext 0 -
DATA
data byte n data byte n +
-STROBE
BUSY
-ACKNLG
t
hold
t
setup
t
stb
t
ready
t
busy
t
reply
t
ack
t
nbusy
t
next
Table 1-10. Typical tack time
Parallel I/F mode Time required
High speed 1 us
Normal speed 3 us

EPSON Stylus Scan 2000 Revision A
Product Description Interfaces 20
USB
Standard :based on
“Universal Serial Bus Specifications Revision 1.0”
“Universal Serial Bus Device Class Definition for
Printing Devices Version 1.0”
Bit rate :12Mbps (Full speed device)
Data encoding :NRZI
Adaptable connector :USB series B
Suggested cable length :2 meters
Figure 1-8. USB Pins
PREVENTING DATA TRANSFER TIME-OUTS
Generally, hosts abandon data transfer to peripherals when a peripheral is in
the busy state for dozens of seconds continuously. To prevent hosts from
entering this kind of time-out period, the printer slows down the data reception
rate to around several bytes per minute, even if the printer is in the busy state.
This slowdown starts when the remaining open buffer area decreases to
several hundred bytes. The Stylus Scan enters a continuous busy state if the
input buffer becomes full.
Table 1-11. USB connector pin assignments and signals
Pin no. Signal name In/Out Description
1 VCC - Cable power, max. power consumption is
100mA
2-Data bi-directional data
3 +Data bi-directional data, pull up to +3.3V via 1.5K Ωresistor
4Ground -Cable ground
Pin #2 Pin #1
Pin #4
Pin #3