Epson 2000P - Stylus Photo Color Inkjet Printer User manual

EPSON Stylus PHOTO 2000P
Color ink jet printer
SEIJ00003
®
SERVICE MANUAL
SERVICE MANUALSERVICE MANUAL
SERVICE MANUAL

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 © 2000 SEIKO EPSON CORPORATION. Printed in Japan.

3
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 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 COMPONENTS BY THE MANUFACTURE; INTRODUCTION OF
SECOND-SOURCE ICs OR OTHER NONAPPROVED COMPONENTS MAY DAMAGE THE PRODUCT AND VOID ANY APPLICABLE EPSON
WARRANTY.

4
PREFACE
This manual describes basic functions, theory of electrical and mechanical operations, maintenance and repair procedures of EPSON Stylus
PHOTO 2000P. 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 Summary
• EEPROM Address Map
• Circuit Board Component Layout
• Exploded Diagrams
• Parts List
• Electrical Board Circuit Diagrams

5
Revision Status
Revision Issued Date Description
A May 11, 2000 First Release

Stylus PHOTO 2000P Revision A
6
Contents
Chapter 1 Product Descriptions
1.1 General Characteristics .................................................................. 10
1.2 Printing specification ...................................................................... 11
1.2.1 Printing specification ................................................................. 11
1.2.2 Paper feeding ............................................................................ 11
1.2.3 Input data buffer ........................................................................ 12
1.2.4 Electric specification .................................................................. 12
1.2.5 Environmental condition ............................................................ 13
1.2.6 Reliability ................................................................................... 14
1.2.7 Safety Approvals ....................................................................... 14
1.2.8 Acoustic noise ........................................................................... 14
1.2.9 CE Marking ................................................................................ 14
1.3 Interface ............................................................................................ 15
1.3.1 Hardware interface .................................................................... 15
1.3.1.1 Parallel interface ................................................................. 15
1.3.1.2 Parallel Interface (Reverse Channel) ................................. 18
1.3.1.3 USB interface ..................................................................... 19
1.3.1.4 Prevention Hosts from Data Transfer Time-out .................. 20
1.3.1.5 Interface Selection .............................................................. 20
1.3.1.6 IEEE1284.4 protocol .......................................................... 20
1.4 Operator Controls ............................................................................ 21
1.4.1 Buttons ...................................................................................... 21
1.4.2 LED Indicators ........................................................................... 21
1.4.3 Panel Functions ......................................................................... 22
1.4.4 Special Setting Mode ................................................................ 22
1.4.5 Printer Condition and Panel Status ........................................... 23
1.4.6 Errors ......................................................................................... 23
1.4.7 Printer Initialization .................................................................... 24
1.5 Paper ................................................................................................. 25
1.5.1 Paper handling .......................................................................... 25
1.5.2 Paper specification .................................................................... 25
1.5.2.1 Cut Sheet ........................................................................... 25
1.5.2.2 Envelope ............................................................................ 25
1.5.2.3 EPSON special media ........................................................ 25
1.6 Printing area .................................................................................... 27
1.6.1 Cut Sheet .................................................................................. 27
1.6.1.1 Envelopes ........................................................................... 28
1.7 Ink cartridge ..................................................................................... 29
1.7.1 Black ink cartridge ..................................................................... 29
1.7.2 Color ink cartridge ..................................................................... 29
1.8 Physical specification ..................................................................... 30
Chapter 2 OPERATING PRINCIPLES
2.1 Overview .......................................................................................... 32
2.1.1 Printer Mechanism .................................................................... 32
2.1.2 Ink ............................................................................................. 33
2.1.2.1 Comparison between Pigment Ink and Dye Ink ................. 33
2.1.2.2 Drop of Pigment Ink and Dye Ink ....................................... 33
2.1.3 Printhead Mechanism ............................................................... 34
2.1.4 Carriage Mechanism ................................................................. 35
2.1.4.1 Carriage Motor (CR Motor) ................................................. 35
2.1.4.2 Platen Gap (PG) /Parallelism Adjustment Mechanism ....... 36
2.1.4.3 Carriage Home Position (HP) Detection ............................. 36
2.1.5 Paper Feeding Mechanism ....................................................... 36
2.1.5.1 CR Lock Mechanism .......................................................... 38
2.1.6 Paper Loading Mechanism ....................................................... 39
2.1.6.1 Drive Transmission to the ASF Unit ................................... 39
2.1.6.2 Paper Loading Operation ................................................... 40
2.1.6.3 Pump Mechanism ............................................................... 41
2.1.6.4 Capping Mechanism ........................................................... 42
2.2 Electrical Circuit Operating Principles .......................................... 43
2.2.1 C298PSB/PSE Board ................................................................ 43
2.2.1.1 Electrical Circuit .................................................................. 43
2.2.1.2 Protection Circuits .............................................................. 45
2.2.1.3 Power Supply Control Function .......................................... 45

Stylus PHOTO 2000P Revision A
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2.2.1.4 Energy Save Mode ............................................................. 45
2.2.2 C304MAIN Board Circuit Operation Principles .......................... 46
2.2.2.1 Printhead Driver Circuit ...................................................... 48
2.2.2.2 Reset Circuit ....................................................................... 49
2.2.2.3 Motor Driver Circuit ............................................................ 49
2.2.2.4 ASF/Pump Motor Driver Circuit .......................................... 52
2.2.2.5 EEPROM Control Circuit .................................................... 53
2.2.2.6 Sensor Circuit ..................................................................... 53
Chapter 3 TROUBLESHOOTING
3.1 Overview ........................................................................................... 56
3.1.1 Self-Diagnostic Function ........................................................... 57
3.1.1.1 Troubleshooting with LED Error Indicators ......................... 57
3.1.1.2 Error Conditions ................................................................. 58
3.1.1.3 Remedies for Paper Out Error ............................................ 60
3.1.1.4 Remedies for the Paper Jam Error ..................................... 62
3.1.1.5 Remedies for No Ink Cartridge Error/Ink Cartridge Problem 63
3.1.1.6 Remedies for Maintenance Request Error ......................... 63
3.1.1.7 Remedies for Fatal Error .................................................... 64
3.1.2 Isolating the Faulty Part on the Power Supply Board ................ 67
3.1.3 Isolating the Faulty Part according to the Phenomenon ............ 69
3.2 FAQ ................................................................................................... 73
Chapter 4 DISASSEMBLY AND ASSEMBLY
4.1 Overview ........................................................................................... 76
4.1.1 Precaution for Disassembling the Printer .................................. 76
4.1.2 Tools .......................................................................................... 77
4.1.3 Specifications for Screws .......................................................... 78
4.1.4 Service Checks After Repair ..................................................... 79
4.2 Disassembly Procedures ................................................................ 80
4.2.1 HOUSING Removal .................................................................. 81
4.2.2 Circuit Board Assembly Removal .............................................. 82
4.2.3 Panel Unit Removal ................................................................... 85
4.2.4 Printhead Unit Removal ............................................................ 87
4.2.5 TRAY, ABSORBER ASSEMBLY Removal ............................... 89
4.2.6 Ink Unit Removal ....................................................................... 91
4.2.7 MOTOR ASSEMBLY, CR Removal .......................................... 94
4.2.8 MOTOR ASSEMBLY, ASF Removal ........................................ 95
4.2.9 DE Unit Removal ....................................................................... 96
4.2.10 ASF Unit Removal ................................................................... 99
4.2.10.1 SHAFT, ROLLER, LD Removal ..................................... 101
4.2.10.2 ROLLER ASSEMBLY, LD, RIGHT/LEFT Removal ........ 106
4.2.11 Carriage Unit Removal .......................................................... 107
4.2.12 BOARD ASSEMBLY, ENCODER Removal .......................... 109
4.2.13 ROLLER, PF Removal .......................................................... 110
4.2.13.1 SCALE, PF Installation ................................................... 113
4.2.14 MOTOR ASSEMBLY, PF Removal ....................................... 116
4.2.15 PE Sensor Unit Removal ...................................................... 117
Chapter 5 ADJUSTMENT
5.1 Overview ........................................................................................ 119
5.1.1 Adjustment Items .................................................................... 119
5.1.2 Adjustment Tools .................................................................... 120
5.2 Adjustment ..................................................................................... 121
5.2.1 Parallelism Adjsutment ........................................................ 121
5.2.2 Backlash Adjsutment ............................................................ 123
5.2.3 Using the Adjustment Program ............................................... 125
5.2.3.1 About the Adjustment Program ........................................ 125
5.2.3.2 How to Install the Program ............................................... 125
5.2.3.3 How to Uninstall the Program ........................................... 125
5.2.3.4 Starting the Adjustment Program ..................................... 126
5.2.4 Head voltage ID input ........................................................... 126
5.2.4.1 Where to Find the Head ID ............................................... 126
5.2.4.2 Check Present Data ......................................................... 127
5.2.4.3 Change Data .................................................................... 127
5.2.5 Head angular adjsutment ..................................................... 128
5.2.6 Bi-Directional adjustment ..................................................... 130
5.2.7 USB ID check/input ............................................................... 132
5.2.7.1 Inputting/Checking the USB ID ......................................... 132
5.2.8 Head cleaning ........................................................................ 133
5.2.9 Initial ink charge .................................................................... 134
5.2.10 Protection counter check ................................................... 134
5.2.10.1 Check the Present Counter Value .................................. 134
5.2.10.2 Clear the Protection Counter Values .............................. 135
5.2.11 CSIC information ................................................................. 136

Stylus PHOTO 2000P Revision A
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5.2.12 Print A4 pattern ................................................................... 137
5.2.12.1 Recovery Routine ........................................................... 137
Chapter 6 MAINTENANCE
6.1 Overview ......................................................................................... 139
6.1.1 Cleaning .................................................................................. 139
6.1.2 Service Maintenance ............................................................... 139
6.1.2.1 Head Cleaning .................................................................. 139
6.1.2.2 Paper Eject Roller Cleaning ............................................. 140
6.1.2.3 ASF Roller Cleaning ......................................................... 141
6.1.2.4 Maintenance Request Error Clear .................................... 142
6.1.3 Lubrication ............................................................................... 142
Chapter 7 APPENDIX
7.1 Connector Summary ..................................................................... 149
7.1.1 Connector Pin Assignment ...................................................... 149
7.2 EEPROM Address Map ................................................................. 153
7.3 Circuit Board Component Layout ................................................ 157
7.4 Exploded Diagrams ....................................................................... 160
7.5 Parts List ........................................................................................ 161
7.6 Electrical Circuit Board Diagrams ............................................... 167

CHAPTER
1
PRODUCT DESCRIPTIONS

EPSON Stylus PHOTO 2000P Revision A
Product Descriptions General Characteristics 10
1.1 General Characteristics
High color print quality
- 2880 (H) x 720 (V) dpi printing
- 6 color printing (YMCK)
- Traditional and New Microweave
- Pigment Ink supported
Built-in auto sheet feeder
- A3+paper supported
- Holds 100 cut-sheets (64 g/m2)
- Holds 10 envelopes
- Holds 30 transparency films
Built-in 2 I/F
- Bi-directional parallel I/F (IEEE-1284 level 1 device)
- USB
Windows/Macintosh exclusive

EPSON Stylus PHOTO 2000P Revision A
Product Descriptions Printing specification 11
1.2 Printing specification
1.2.1 Printing specification

Print method : On demand ink jet

Nozzle Configuration: 48 nozzles x 6 colors
(Black, Cyan, Magenta, Yellow,
Light-Cyan, Light-Magenta)
Print direction: Bi-direction with logic seeking
Print speed & Printable columns
* Do not mention in the user’s manual.
** This value is the speed of normal-dot printing.

Control code : ESC/P Raster command
: EPSON Remote command

Character tables : 2 international character sets
- PC 437 (US, Standard Europe)
- PC 850(Multilingual)

Typeface : Bit map LQ font
- EPSON Courier 10 CPI
1.2.2 Paper feeding
Feeding Method
Friction feed with ASF
Line Spacing
Programmable by 1/6” or 1/360” step
Paper Path
Cut-sheet ASF (Top entry Front out)
Feed Speed
110msec (10.16mm feed)
152.4mm/sec (6.0 inch/sec) (Fast, continuous feed)
Table 1-1. Character Mode
Character pitch Printable columns LQ speed
10 CPI (Pica) 127 238 CPS**
Table 1-2. Raster Graphic Mode
Horizontal
resolution Printable area Available dot CR Speed
180 dpi 322.986mm(12.71
6 inch)
2289 60.452/48.26cm/
s(23.8/19 IPS)
360 dpi 322.986mm(12.71
6 inch)
4578 60.452/48.26cm/s
(23.8/19 IPS)
720 dpi 322.986mm(12.71
6 inch)
9156 48.26cm/s(19 IPS)

EPSON Stylus PHOTO 2000P Revision A
Product Descriptions Printing specification 12
ASF Hopper Specification
Paper size
90mm x 205mm ~ A3+
Thickness
8mm or less
Number of sheets
Stacker Capacity
NOTE: The figures in the table is measured in the normal room condition.
1.2.3 Input data buffer
: 256KB
1.2.4 Electric specification
120 V version
Rated voltage: AC 120 V
Input voltage range: AC 99 - 132 V
Rated frequency range: 50 - 60 Hz
Input frequency range: 49.5 - 60.5 Hz
Rated current: 0.4A
Power consumption: Approx. 1815W (ISO10561 Letter Pattern)
Approx. 3.5W in standby mode
Energy Star compliant
Insulation Resistance: 10 M ohms min.
(between AC line and chassis, DC 500 V)
Table 1-3. Hopper Capacity
Paper Type Size Sheets
Plain paper (65g/m2) A4, A3, Letter, Legal approx. 100 sheets
Envelope See “Paper specification” on
page -25
10 sheets
Premium Semigloss Photo
Paper
A3+, A3, A4, Letter, US B 1 sheet
Glossy Paper-Photo Weight A3+, A3, A4, Letter, US B 1 sheet
Archival Matte Paper A4, Letter 1 sheet
A3, A3+, US B 20 sheet
Watercolor Paper-Radiant
White
A3+ 1 sheet
Super Fine A3+, A3, A4 approx. 65 sheets
Table 1-4. Stacker Capacity
Paper Type Print Type Stacker Capacity
Plain paper Text 30 sheet or more
Graphics 20 sheet or more
Envelope Text 10 sheet or more
Archival Matte Paper Graphics 10 sheet or more
Super Fine Graphics 10 sheet or more
Other special paper Graphics 1 sheet or more

EPSON Stylus PHOTO 2000P Revision A
Product Descriptions Printing specification 13
Dielectric strength: AC 1000 V rms. 1 minute or
AC 1200 V rms. 1 second
(between AC line and chassis)
220-240 V version
Rated voltage: AC 220 - 240 V
Input voltage range: AC 198 - 264 V
Rated frequency range: 50 - 60 Hz
Input frequency range: 49.5 - 60.5 Hz
Rated current: 0.2A
Power consumption: Approx. 1815W (ISO10561 Letter Pattern)
Approx. 3.5W in standby mode
Energy Star compliant
Insulation Resistance: 10 M ohms min.
(between AC line and chassis, DC 500 V)
Dielectric strength: AC 1500 V rms. 1 minute
(between AC line and chassis)
1.2.5 Environmental condition
Temperature : 10 to 35 °C (operating *3)
: -20 to 60 °C (non-operating, *1)
1 month at 40 °C
120 hours at 60 °C
Humidity : 20 to 80% RH (operating, *2,*3)
: 5 to 85% RH (non-operating, *1, *2)
Resistance to shock: 1 G, within 1 ms (operating)
: 2 G, within 2 ms (non-operating, *1)
Resistance to vibration: 0.15G (operating)
: 0.50G (non-operating, *1)
NOTE: *1: with shipment container
*2: without condensation
*3: Condition is as following figure.
Figure 1-1. Environmental Condition
10 27 30 35 40
20
Temperature (°C)
20
30
40
50
90
80
70
60
Humidity (%)

EPSON Stylus PHOTO 2000P Revision A
Product Descriptions Printing specification 14
1.2.6 Reliability
Total print volume : 25,000 pages(Black)/10,000 pages(Color) (A4, Letter)
Print Head Life : 3000 million dots/nozzle
1.2.7 Safety Approvals
120 V version:
Safety standards : UL1950
CSA22.2 No.950
EMI : FCC part15 subpart B class B
CSA C108.8 class B
220-240 V version:
Safety standards : EN 60950(VDE)
EMI : EN 55022(CISPR Pub.22) class B
: AS/NZS 3548 class B
1.2.8 Acoustic noise
Level : Approx. 42 dB(A) (According to ISO 7779)
1.2.9 CE Marking
220-240 V version
Low Voltage Directive 73/23/EEC: EN60950
EMC Directive 89/336/EEC: EN55022 class B
EN61000-3-2
EN61000-3-3
EN50082-1
IEC801-2
IEC801-3
IEC801-4

EPSON Stylus PHOTO 2000P Revision A
Product Descriptions Interface 15
1.3 Interface
1.3.1 Hardware interface
This printer provides USB and parallel interface as standard.
1.3.1.1 Parallel interface
Transmission mode : 8 bit parallel, IEEE-1284 compatibility mode
Synchronization : By STROBE pulse
Handshaking : By BUSY and ACKNLG signal
Signal level : TTL compatible level
Adaptable connector : 57-30360(amphenol) or equivalent
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.
Data transmission timing
DATA data byte n data byte n+1
-STROBE
BUSY
-ACKNLG
thold
tsetu tstb
tready tbusy
treply tack tnbusy
tnext

EPSON Stylus PHOTO 2000P Revision A
Product Descriptions Interface 16
Typical timing for tack is shown below.
* A low logic level on the Logic H signal is 2.0V or less when the printer is
powered off, and this signal is equal to or exceeding 3.0V when the printer
is powered on. The receiver shall provide an impedance equivalent to 7.5K
ohm to ground.
Table 1-5. Parameters
Parameter Minimum Maximum
tsetup 500ns -
thold 500ns -
tstb 500ns -
tready 0 -
tbusy - 500ns
tt-out*1
*1:Rise and fall time of every output signal.
-120ns
tt-in*2
*2:Rise and fall time of every input signal.
- 200ns
treply 0 -
tack 500ns 10us
tnbusy 0 -
tnext 0 -
Table 1-6. Typical Time of Tack
Parallel I/F Mode Typical Time of tack
High Speed 0.5us
Normal Speed 2us
Table 1-7.
Signal Level: TTL Compatible (IEEE-1284 level 1 device)
Parameter Minimum Maximum Condition
VOH* - 5.5V
VOL* -0.5V -
IOH* - 0.32mA VOH = 2.4V
IOL* -12mA VOL = 0.4V
CO - 50pF
VIH -2.0V
VIL 0.8V -
IIH -0.32mA VIH = 2.0V
IIL - 12mA VIL = 0.8V
CI -50pF

EPSON Stylus PHOTO 2000P Revision A
Product Descriptions Interface 17
NOTE: In/Out refers to the direction of signal flow seen from the printer side.
Table 1-8. Connector Pin Assignment and Signals
Pin
No.
Signal
Name
Return
GND
pin
In/Out Functional description
1 -STROBE 19 In The strobe pulse. Read-in of data is
performed at the falling edge of this pulse.
2DATA0 20 In The DATA0 through DATA7 signals
represent data bits 0 to 7, respectively.
3 -9 DATA1-7 21-27 In Each signal is at high level when data is
logical 1 and low level when data is logical
0.
10 -ACKNLG 28 Out This signal is a negative pulse indicating
that the printer can again accept data.
11 BUSY 29 Out A high signal indicates that the printer
cannot receive data.
12 PE 28 Out A high signal indicates paper-out error.
13 SLCT 28 Out Always at high level when the printer is
powered 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 50 us pulse is
necessary.
32 -ERROR 29 Out A low signal indicates printer error
condition.
36 -SLIN 30 In Not used.
18 Logic H -Out Pulled up to +5 V via 3.9 K ohm resistor.
35 +5V - Out Pulled up to +5 V via 3.3 K ohm resistor.
17 Chassis
GND
- - Chassis GND.
16, 33
19-30
GND - - Signal GND.
15, 34 NC - - Not connected.
Table 1-8. Connector Pin Assignment and Signals
Pin
No.
Signal
Name
Return
GND
pin
In/Out Functional description

EPSON Stylus PHOTO 2000P Revision A
Product Descriptions Interface 18
1.3.1.2 Parallel Interface (Reverse Channel)
Transmission mode : IEEE-1284 nibble mode
Adaptable connector : See forward channel
Synchronization : Refer to the IEEE-1284 specification
Handshaking : Refer to the IEEE-1284 specification
Data trans. timing : Refer to the IEEE-1284 specification
Signal level : IEEE-1284 level 1 device
See forward channel
NOTE: In/Out refers to the direction of signal flow seen from the printer side.
Table 1-9. Connector pin assignment and signals
Pin
No. Signal Name
Return
GND
Pin
In/
Out* Functional description
1 HostClk 19 In Host clock signal.
2DATA0 20 In The DATA0 through DATA7 signals
represent data bits 0 to 7,
3 DATA1 21 In respectively.
4DATA2 22 In Each signal is at high level when data
is logical 1 and low level when
5 DATA3 23 In data is logical 0.
6DATA4 24 In These signals are used to transfer the
1284 extensibility request values
7 DATA5 25 In to the printer.
8DATA6 26 In
9 DATA7 27 In
10 PtrClk 28 Out Printer clock signal.
11 PtrBusy /
DataBit-3,7
29 Out Printer busy signal and reverse
channel transfer data bit 3 or 7.
12 AckDataReq /
DataBit-2,6
28 Out Acknowledge data request signal and
reverse channel transfer data bit 2 or
6.
13 Xflag /
DataBit-1,5
28 Out X-flag signal and reverse channel
transfer data bit 1 or 5.
14 HostBusy 30 In Host busy signal.
31 -INIT 30 In Not used.
32 -DataAvail /
DataBit-0,4
29 Out Data available signal and reverse
channel transfer data bit 0 or 4.
36 1284-Active 30 In 1284 active signal.
18 Logic-H -Out Pulled up to +5 V via 3.9 K ohm
resistor.
35 +5V - Out Pulled up to +5 V via 3.3 K ohm
resistor.
17 Chassis GND - - Chassis GND.
16, 33
19-30
GND - - Signal GND.
15, 34 NC - - Not connected.
Table 1-9. Connector pin assignment and signals
Pin
No. Signal Name
Return
GND
Pin
In/
Out* Functional description

EPSON Stylus PHOTO 2000P Revision A
Product Descriptions Interface 19
Extensibility Request
The printer responds affirmatively when the extensibility request values
are 00H or 04H,
00H : Request Nibble Mode Reverse Channel Transfer.
04H : Request Device ID;
Return Data Using Nibble Mode Rev Channel Transfer.
Device ID
World Standard Model
The printer sends following device ID string when it is requested.
When IEEE1284.4 is enabled,
[00H] [5CH]
MFG:EPSON;
CMD:ESCPL2,BDC,D4;
MDL:Stylus[[SP]Photo[SP]2000P;
CLS:PRINTER;
DES:EPSON[SP]Stylus[SP]Photo[SP]2000P;
When IEEE1284.4 is disabled,
[00H] [59H]
MFG:EPSON;
CMD:ESCPL2,BDC;
MDL:Stylus[SP]Photo[SP]2000P;
CLS:PRINTER;
DES:EPSON[SP]Stylus[SP]Photo[SP]2000P;
1.3.1.3 USB interface
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
Recommended cable length: 2 meters
Figure 1-2. USB Pin Assignment
Table 1-10. Connector pin assignment and signals
Pin No. Signal
name In/Out Function description
1 VCC - Cable power. Maximum power
consumption is 2mA
2-Data bi-directional data
3 +Data bi-directional data, pull up to +3.3V via 1.5K ohm
resistor
4Ground -Cable ground
Pin #1
Pin #3
Pin #2
Pin #4

EPSON Stylus PHOTO 2000P Revision A
Product Descriptions Interface 20
1.3.1.4 Prevention Hosts from Data Transfer Time-out
Generally, hosts abandon data transfer to peripherals when a peripheral
is in the busy state for dozens of seconds continuously. To prevent hosts
from this kind of time-out, the printer receives data very slowly, several
bytes per minute, even if the printer is in busy state. This slowdown is
started when the rest of the input buffer becomes several hundreds of
bytes. Finally, the printer is in the busy state continuously when the input
buffer is full.
USB and IEEE1284.4 on the parallel interface do not require this function.
1.3.1.5 Interface Selection
The printer has 2 built-in interfaces; the USB and parallel interface.
These interfaces are selected automatically.
- Automatic selection
In this automatic interface selection mode, the printer is initialized to the
idle state scanning which interface receives data when it is powered on.
Then the interface that receives data first is selected. When the host stops
data transfer and the printer is in the stand-by state for the seconds, the
printer is returned to the idle state. As long as the host sends data or the
printer interface is busy state, the selected interface is let as it is.
- Interface state and interface selection
When the parallel interface is not selected, the interface got into the busy
state. When the printer is initialized or returned to the idle state, the
parallel interface got into the ready state. Caution that the interrupt signal
such as the -INIT signal on the parallel interface is not effective while that
interface is not selected.
1.3.1.6 IEEE1284.4 protocol
The packet protocol described by IEEE1284.4 standard allows a device to
carry on multiple exchanges or conversations which contain data and/or
control information with another device at the same time across a single
point-to-point link. The protocol is not, however, a device control
language. It does provide basic transport-level flow control and
multiplexing services. The multiplexed logical channels are independent
of each other and blocking of one has no effect on the others. The
protocol operate over IEEE1284.
Automatic selection
An initial state is compatible interface and starts IEEE1284.4
communication when magic strings (1284.4 synchronous commands) are
received.
On
An initial state is IEEE1284.4 communication and data that received it by
the time it is able to take synchronization by magic string (1284.4
synchronous commands) is discarded.
Off
An initial state is compatible interface and never starts IEEE1284.4
communication even if magic strings (1284.4 synchronous commands)
are received.