Epson Stylus Photo 820 User manual

EPSON StylusPHOTO810/820
Color Inkjet Printer
SEIJ01006
®
SERVICE MANUAL

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, 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 respec-
tive owners. EPSON disclaims any and all rights in those marks.
Copyright © 2000 SEIKO EPSON CORPORATION.
TPCS Quality Assurance Dept.

PRECAUTIONS
Precautionary notations throughout the text are categorized relative to 1)Personal injury and 2) damage to equipment.
DANGER Signals a precaution which, if ignored, could result in serious or fatal personal injury. Great caution should be exercised in
performing procedures preceded by DANGER Headings.
WARNING Signals a precaution which, if ignored, could result in damage to equipment.
The precautionary measures itemized below should always be observed when performing repair/maintenance procedures.
DANGER
1. ALWAYS DISCONNECT THE PRODUCT FROM THE POWER SOURCE AND PERIPHERAL DEVICES PERFORMING ANY
MAINTENANCE OR REPAIR PROCEDURES.
2. NO WORK SHOULD BE PERFORMED ON THE UNIT BY PERSONS UNFAMILIAR WITH BASIC SAFETY MEASURES AS DICTATED
FOR ALL ELECTRONICS TECHNICIANS IN THEIR LINE OF WORK.
3. WHEN PERFORMING TESTING AS DICTATED WITHIN THIS MANUAL, DO NOT CONNECT THE UNIT TO A POWER SOURCE UNTIL
INSTRUCTED TO DO SO. WHEN THE POWER SUPPLY CABLE MUST BE CONNECTED, USE EXTREME CAUTION IN WORKING ON
POWER SUPPLY AND OTHER ELECTRONIC COMPONENTS.
4. WHEN DISASSEMBLING OR ASSEMBLING A PRODUCT, MAKE SURE TO WEAR GLOVES TO AVOID INJURIER FROM METAL PARTS
WITH SHARP EDGES. WARNING
1. REPAIRS ON EPSON PRODUCT SHOULD BE PERFORMED ONLY BY AN EPSON CERTIFIED REPAIR TECHNICIAN.
2. MAKE CERTAIN THAT THE SOURCE VOLTAGES IS THE SAME AS THE RATED VOLTAGE, LISTED ON THE SERIAL NUMBER/
RATING PLATE. IF THE EPSON PRODUCT HAS A PRIMARY AC RATING DIFFERENT FROM AVAILABLE POWER SOURCE, DO NOT
CONNECT IT TO THE POWER SOURCE.
3. ALWAYS VERIFY THAT THE EPSON PRODUCT HAS BEEN DISCONNECTED FROM THE POWER SOURCE BEFORE REMOVING OR
REPLACING PRINTED CIRCUIT BOARDS AND/OR INDIVIDUAL CHIPS.
4. IN ORDER TO PROTECT SENSITIVE MICROPROCESSORS AND CIRCUITRY, USE STATIC DISCHARGE EQUIPMENT, SUCH AS
ANTI-STATIC WRIST STRAPS, WHEN ACCESSING INTERNAL COMPONENTS.
5. REPLACE MALFUNCTIONING COMPONENTS ONLY WITH THOSE COMPONENTS BY THE MANUFACTURE; INTRODUCTION OF
SECOND-SOURCE ICs OR OTHER NONAPPROVED COMPONENTS MAY DAMAGE THE PRODUCT AND VOID ANY APPLICABLE
EPSON WARRANTY.

About This Manual
This manual describes basic functions, theory of electrical and mechanical operations, maintenance and repair procedures of the printer. The instructions and
procedures included herein are intended for the experienced repair technicians, and attention should be given to the precautions on the preceding page.
Manual Configuration
This manual consists of six chapters and Appendix.
CHAPTER 1.PRODUCT DESCRIPTIONS
Provides a general overview and specifications of the
product.
CHAPTER 2.OPERATING PRINCIPLES
Describes the theory of electrical and mechanical
operations of the product.
CHAPTER 3.TROUBLESHOOTING
Describes the step-by-step procedures for the
troubleshooting.
CHAPTER 4.DISASSEMBLY / ASSEMBLY
Describes the step-by-stepprocedures for disassembling
and assembling the product.
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:
• Connector pin assignments
• Electric circuit boards components layout
• Electrical circuit boards schematics
• Exploded diagram & Parts List
Symbols Used in this Manual
Various symbols are used throughout this manual either to provide
additional information on a specific topic or to warn of possible danger
present during a procedure or an action. Be aware of all symbols when
they are used, and always read NOTE, CAUTION, or WARNING
messages.
Indicates an operating or maintenance procedure, practice
or condition that, if not strictly observed, could result in
injury or loss of life.
Indicates an operating or maintenance procedure, practice,
or condition that, if not strictly observed, could result in
damage to, or destruction of, equipment.
May indicate an operating or maintenance procedure,
practice or condition that is necessary to accomplish a task
efficiently. It may also provide additional information that is
related to a specific subject, or comment on the results
achieved through a previous action.
I.ndicates an operating or maintenance procedure, practice
or condition that, if not strictly observed, could result in injury
or loss of life.
Indicates that a particular task must be carried out
according to a certain standard after disassembly and
before re-assembly, otherwise the quality of the
components in question may be adversely affected.
ADJUSTM ENT
REQUIRED
CAUTION
CHECK
PO IN T
W ARNING

Revision Status
Revision Issued Date Description
A 2001/8/23 First Release

PRODUCT DESCRIPTION
FEATURES .................................................................................................... 9
SPECIFICATIONS........................................................................................ 10
Physical Specification.............................................................................. 10
Printing Specification............................................................................... 10
Paper Feeding......................................................................................... 11
Paper Specification ................................................................................. 11
Plain Paper 11
Envelope 12
Exclusive paper 12
Printing Area............................................................................................ 14
Cut Sheet 14
Envelopes 15
Ink Cartridge Specification ...................................................................... 15
Black Ink Cartridge 15
Color Ink Cartridge 16
Electric Specification............................................................................... 16
Environmental Condition ......................................................................... 17
Reliability................................................................................................. 17
Safety Approvals..................................................................................... 17
Acoustic Noise......................................................................................... 17
CE Marking.............................................................................................. 17
INTERFACE................................................................................................. 18
Parallel Interface (Forward Channel) ...................................................... 18
Parallel Interface (Reserve Channel) ...................................................... 21
USB Interface.......................................................................................... 22
Prevention Hosts of Data Transfer Time-out........................................... 23
Interface Selection................................................................................... 23
IEEE1284.4 Protocol............................................................................... 23
PANEL CONTROL ....................................................................................... 24
Indicators (LEDs)..................................................................................... 24
Panel Functions....................................................................................... 25
Printer Condition and Panel Status......................................................... 25
Error Status............................................................................................. 26
Printer Initialization.................................................................................. 26
Operating Principles
Overview ...................................................................................................... 28
Printer Mechanism .................................................................................. 28
Printhead................................................................................................. 29
Printing Process 30
Printing Method 30
Carriage Mechanism............................................................................... 31
Paper Loading/Feeding Mechanism ....................................................... 32
Paper Loading Mechanism (ASF unit) 33
Paper Feeding Mechanism 36
Ink System Mechanism........................................................................... 37
Capping Mechanism 37
Pump unit mechanism 39
Ink Sequence .......................................................................................... 40
Electrical Circuit Operating Principles .......................................................... 42
C417 PSB/PSE board............................................................................. 42
C418 MAIN/MAIN-B Board ..................................................................... 45
Main Elements 46
Printhead Driver Circuit 47
PF Motor (PF/ PUMP/ ASF Motor) Driver Circuit 48
CR Motor Driver Circuit 48
Reset Circuit 49
EEPROM Control Circuit 49
Sensor Circuit 50
Troubleshooting
Overview ...................................................................................................... 52
Troubleshooting with LED Error Indications
and Status Monitor 3 Message............................................................. 53
Unit Level Troubleshooting........................................................................... 58
Disassembly and Assembly
Overview ...................................................................................................... 80
Precautions ............................................................................................. 80
Tools ....................................................................................................... 82
Screws.................................................................................................................. 82

Work Completion Check.......................................................................... 83
Disassembly ................................................................................................. 84
Upper housing removal........................................................................... 85
Printhead removal................................................................................... 87
CR unit removal....................................................................................... 89
CR motor removal ................................................................................... 92
ASF unit removal..................................................................................... 93
PSB/PSE unit removal ............................................................................ 95
Holder shaft unit removal ........................................................................ 98
Circuit board removal............................................................................ 102
Waste drain ink pad (under the ASF unit)removal ............................... 105
Lower housing removal......................................................................... 106
Caution regarding Ink system removal, PF roller
unit removal and PF motor removal.......................................... 110
Ink system unit removal
(Cap unit, Pump unit & Waste drain ink pad)........................................ 111
PF roller unit removal............................................................................ 114
PF motor removal.................................................................................. 116
Adjustment
Overview..................................................................................................... 118
Required Adjustment............................................................................. 118
Maintenance
Overview..................................................................................................... 120
Cleaning................................................................................................ 120
Service Maintenance............................................................................. 120
Lubrication............................................................................................. 122
Appendix
Connector Summary................................................................................... 126
Major Component Unit .......................................................................... 126
EEPROM Address Map......................................................................... 128
Component Layout..................................................................................... 132
Exploded Diagram...................................................................................... 134
Parts List..................................................................................................... 140
Electrical Circuits........................................................................................ 142

CHAPTER
1
PRODUCTDESCRIPTION

EPSON Stylus PHOTO 810/820 Revision A
PRODUCT DESCRIPTION FEATURES 9
1.1 FEATURES
The major features of EPSON color inkjet dot matrix printer EPSON Stylus PHOTO
810/820 are:
High Color Print Quality
2880 (H) X 720 (V) dpi printing
Six Color Printing (YMCKmc)
Traditional and New Microweave
Built-in Auto Sheet Feeder
Holds 100 cut-sheets (65g/m2)
Holds 10 envelopes
Holds 10 transparency films
Two built-in Interfaces
Bi-directional parallel I/F (IEEE-1284 level 1 device)
USB
Windows/Macintosh exclusive
Figure 1-1. Product’s external view

EPSON Stylus PHOTO 810/820 Revision A
PRODUCT DESCRIPTION SPECIFICATIONS 10
1.2 SPECIFICATIONS
This section covers specifications of the printer.
1.2.1 Physical Specification
Weight : 3.42 kg (without the ink cartridges)
Dimension
Printing : 479.6 mm (W) x 509 mm (D) x 271.8 mm (H)
1.2.2 Printing Specification
Print Method
On demand ink jet
Nozzle Configuration
Monochrome 48 nozzles
Color 48 nozzles x 5 (Cyan, Magenta, Yellow, Light Cyan, Light Magenta)
Figure 1-2. Nozzle configuration
Print Direction
Bi-direction with logic seeking
Print Speed & Printable Columns
*CPS: Characters/Second
* IPS: Inch/Second
Control Code
ESC/P Raster command
EPSON Remote command
Character Tables
None
- ASCII 96 Codes (Code Number 20H-7FH)
International character sets
None
#48
#47
#46
#45
#48 #48
#47
#46
#45
#3
#2
#1
#3
#2
#1
(Black) (Cyan) (Light Cyan)
(Magenta) (Light magenta)
(Yellow)
120 dpi #47
#46
#45
#3
#2
#1
7.902
(112/360inch) 2.2578
(32/360inch)
Table 1-1. Character mode (Black only)
Character pitch Character quality Printable columns CR speed
10 CPI LQ 80 238 CPS*
Table 1-2. Raster graphics mode
Horizontal
resolution Printable area Available dot CR speed
360 dpi
(Normal dot) 209.8 mm (8.26 inch) 2976 86.36 cm/s (34.0 IPS*)
360 dpi
(Multi shot 3 dot) 209.8 mm (8.26 inch) 2976 60.452 cm/s (23.8 IPS*)
720 dpi 209.8 mm (8.26 inch) 5952 50.80 cm/s (20 IPS*)
1440 dpi 209.8 mm (8.26 inch) 11904 50.80 cm/s (20 IPS*)

EPSON Stylus PHOTO 810/820 Revision A
PRODUCT DESCRIPTION SPECIFICATIONS 11
Typeface
Bit map LQ font : EPSON Courier 10 CPI
Input Data Buffer
32 KB
1.2.3 Paper Feeding
Feeding Method
Friction feed with ASF
Paper Path
Cut-sheet ASF (Top entry Front out)
Feed Speed
1.2.4 Paper Specification
1.2.4.1 Plain Paper
Table 1-3. Feed speed
Feed condition Time Speed
10.16 mm (0.4 inch) feed 110 msec 92.36 mm (3.64 inch)/sec
Continuous feed 140 msec 139.7 mm (5.5 inch)/sec
Table 1-4. Plain paper
Item Width
(mm) Length (mm) Thickness (mm) Weight (g/m 2)Quality
A4 210 297
0.08-0.11 64-90
(17-24(lb)) Plain paper Reclaimed paper
Letter 215.9 279.4
Legal 215.9 355.6
Executive 184.2 266.7
Half Letter 139.7 215.9
B5 182 257
A5 148 210
A6 105 148
User
defined 89-241.3 89-1117.6
CAUTION
Poor quality paper may reduce print quality and cause paper
jams or other problems. If you encounter problems, switch to a
higher grade of paper.
Do not load curled or folded paper.
Use paper under normal conditions : Temperature 15 to 25°
°°
°C (59
to 77°
°°
°F) Humidity 40 to 60% RH

EPSON Stylus PHOTO 810/820 Revision A
PRODUCT DESCRIPTION SPECIFICATIONS 12
1.2.4.2 Envelope
* Envelope printing is only available at normal temperature.
Keep the longer side of the envelope horizontally at setting.
1.2.4.3 Exclusive paper
Quality: EPSON Exclusive paper
Transparency printing is only available at normal temperature
Table 1-5. Envelope
Item Width
(mm) Length (mm) Thickness (mm) Weight (g/m 2)Quality *
No.10 241.3 104.8
N/A 45-75
(12-20(lb))
Bond paper
Air mail
PPC
DL 220 110
C6 162 114
Envelope
220*132 220 132
CAUTION
Poor quality paper may reduce print quality and cause paper
jams or other problems. If you encounter problems, switch to a
higher grade of paper.
Do not load curled or folded paper.
Use paper under normal conditions : Temperature 15 to 25°
°°
°C (59
to 77°
°°
°F) Humidity 40 to 60% RH
Table 1-6. Exclusive paper
Item Size Width
(mm) Length (mm) Thickness (mm) Weight (g/m 2)
Photo Quality
Ink Jet Paper
A4 210 297
0.13
102 (27lb) *
Letter 215.9 279.4
102 (27lb)Legal 215.9 355.6
B5 182 257
Photo Quality
Ink Jet Card
5*8 127 203.2
0.21 180 (48lb)8*10 203.2 254
A6 105 148
360dpi Ink Jet Paper A4 210 297 0.11 89 (24lb)
Letter 215.9 279.4
Premium Luster
Photo Paper Letter 215.9 279.4 0.27 250 (66lb)
Ink Jet Transparencies A4 210 297 0.13 N/A
Letter 215.9 279.4
Photo Quality
Glossy Film
A4 210 297
0.13 N/ALetter 215.9 279.4
A6 105 148
Matte Paper-
Heavyweight
A4 210 297 0.23 167(44Ib)
Letter 215.9 279.4

EPSON Stylus PHOTO 810/820 Revision A
PRODUCT DESCRIPTION SPECIFICATIONS 13
* 98 (26lb) for EU
Photo Paper
A4 210 297
0.23 194 (52lb)
Letter 215.9 279.4
Card 100 148
Photo Paper
4*6 113.6 175.4
Panorama 210 594
Photo Quality Self
Adhesive Sheets A4 210 297 0.19 167 (44lb)
Photo Stickers 16 A6 105 148 0.19 167 (44lb)
Photo Stickers 4 A6 105 148 0.19 167 (44lb)
Iron-On Cool Peel
Transfer Paper
A4 210 297 0.18 124 (33lb)
Letter 215.9 279.4
Premium Glossy
Photo Paper
A4 210 297 0.27 255 (68lb)
Letter 215.9 279.4
Premium Semigloss
Photo Paper
A4 210 297 0.27 250 (66lb)
Letter 215.9 279.4
Premium Ink Jet
Plain Paper A4 210 297 0.11 80 (21lb)
Bright White
Ink Jet Paper A4 210 297 0.13 92.5 (25lb)
Table 1-6. Exclusive paper
Item Size Width
(mm) Length (mm) Thickness (mm) Weight (g/m 2)
CAUTION
Poor quality paper may reduce print quality and cause paper
jams or other problems. If you encounter problems, switch to a
higher grade of paper.
Do not load curled or folded paper.
Use paper under normal conditions : Temperature 15 to 25°
°°
°C (59
to 77°
°°
°F) Humidity 40 to 60% RH
EPSON Photo Quality Glossy Film and Self Adhesive Sheets
should be stored under the following conditions :
Temperature 15 to 30°
°°
°C (59 to 86°
°°
°F) Humidity 20 to 60% RH

EPSON Stylus PHOTO 810/820 Revision A
PRODUCT DESCRIPTION SPECIFICATIONS 14
1.2.5 Printing Area
1.2.5.1 Cut Sheet
Refer to the following table. As for each margin area, refer to Figure 1-3.
* Bottom margin can be set to 3mm when the paper length is designated with
“ESC (S” command). However, the printing quality is not guaranteed in the
area, ranging from 3mm to 14mm, from the form lower end. When the paper
length is not designated, the bottom margin must be wider than 14mm.
(Printable area A)
** When all margins (Left / Right / Top / Bottom) can be set to 0mm at minimum
only when the “no margin” is checked on the printer driver. However, the
printing quality is not guaranteed in the area, ranging from 0mm to 3mm,
from the form lower end.
Figure 1-3. Printable area for cut sheet
Table 1-7. Printing area
Paper size Left margin
(min.) ** Right margin (min.) ** Top margin (min.) ** Blackbottommargin (min.) **
A4 3 mm (0.12”) 3 mm (0.12”) 3 mm (0.12”) 14 mm (0.54”) / 3mm
(0.12”) *
Letter 3 mm (0.12”) 3 mm (0.12”) 3 mm (0.12”) 14 mm (0.54”) / 3mm
(0.12”) *
B5 3 mm (0.12”) 3 mm (0.12”) 3 mm (0.12”) 14 mm (0.54”) / 3mm
(0.12”) *
Legal 3 mm (0.12”) 3 mm (0.12”) 3 mm (0.12”) 14 mm (0.54”) / 3mm
(0.12”) *
Statement 3 mm (0.12”) 3 mm (0.12”) 3 mm (0.12”) 14 mm (0.54”) / 3mm
(0.12”) *
Executive 3 mm (0.12”) 3 mm (0.12”) 3 mm (0.12”) 14 mm (0.54”) / 3mm
(0.12”) *
Printable area A
LM RM
PW
TM
BM
PL
Printable area B

EPSON Stylus PHOTO 810/820 Revision A
PRODUCT DESCRIPTION SPECIFICATIONS 15
1.2.5.2 Envelopes
Refer to the following table. As for each margin area, refer to Figure 1-4.
Figure 1-4. Printable area for envelopes
1.2.6 Ink Cartridge Specification
1.2.6.1 Black Ink Cartridge
Type : Exclusive Cartridge
Color : Black
Print Capacity : 540 pages/A4
(ISO/IEC 10561 Letter Pattern at 360 dpi)
Ink Life : 2 years from production date
Storage Temperature:
Storage -20 oC to 40oC (within a month at 40 oC)
Packing -30oC to 40 oC (within a month at 40 oC)
Transit -30 oC to 60 oC (within 120 hours at 60 oC
and within a month at 40 oC)
Dimension : 20.1 mm (W) x 66.85 mm (D) x 38.5 mm (H)
Figure 1-5. Black ink cartridge
Table 1-8. Envelope margin
Paper 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
(Rib area)
(Rib area)

EPSON Stylus PHOTO 810/820 Revision A
PRODUCT DESCRIPTION SPECIFICATIONS 16
1.2.6.2 Color Ink Cartridge
Type : Exclusive Cartridge
Color : Magenta, Cyan, Yellow, Light Cyan, Light Magenta
Print Capacity : 220 pages / A4 (360 dpi, 5% duty each color)
Ink Life : 2 years from production date
Storage Temperature:
Storage -20 oC to 40oC (within a month at 40 oC)
Packing -30 oC to 40 oC (within a month at 40 oC)
Transit -30 oC to 60 oC (within 120 hours at 60 oC
and within a month at 40 oC)
Dimension : 49.1 mm (W) x 66.85 mm (D) x 38.5 mm (H)
Figure 1-6. Color ink cartridge
Note 1: Ink cartridge can not re-fill, only ink cartridge is prepared for article
of consumption.
Note 2: Do not use the ink cartridge which was passed away the ink life.
Note 3: Ink will be frozen under -18 ~ -21 oC environment, however it will be
usable after placing it more than 3 hours at room temperature.
1.2.7 Electric Specification
[120V Version]
Rated Voltage : AC120V
Input Voltage Range : AC90∼132V
Rated Frequency Range : 50∼ 60Hz
Input Frequency Range : 49.5∼ 60.5Hz
Rated Current : 0.4A
Power Consumption : Approx. 17W (ISO10561 Letter Pattern)
Approx. 4W in standby mode
Energy Star compliant
Insulation Resistance : 100M ohms min.
(between AC line and chassis, DC 500V)
Dielectric Strength : AC 1000V rms. 1 minute or
AC 1200V rms. 1 second
(between AC line and chassis)
[220 ∼ 240V Version]
Rated Voltage : AC220V∼240V
Input Voltage Range : AC198∼264V
Rated Frequency Range : 50∼60Hz
Input Frequency Range : 49.5∼60.5Hz
Rated Current : 0.2 A
Power Consumption : Approx. 17W (ISO10561 Letter Pattern)
Approx. 4.5W in standby mode
Energy Star compliant
Insulation Resistance : 100M ohms min.
(between AC line and chassis, DC 500V)
Dielectric Strength : AC 1500V rms. 1 minute
(between AC line and chassis)
(Rib area)
(Rib area)

EPSON Stylus PHOTO 810/820 Revision A
PRODUCT DESCRIPTION SPECIFICATIONS 17
1.2.8 Environmental Condition
Temperature
Operating : 10 to 35°C (refer to Figure 1-7)
Non-operating : -20 to 60°C (with shipment container)
1 month at 40°C and 120 hours at 60°C
Humidity
Operating : 20 to 80% RH
(without condensation / refer to Figure 1-7)
Non-operating : 5 to 85% RH
(without condensation / with shipment container)
Resistance to Shock
Operating : 1G, within 1 ms
Non-operating : 2G, within 2 ms (with shipment container)
Resistance to Vibration
Operating : 0.15G
Non-operating : 0.50G (with shipment container)
Figure 1-7. Temperature/Humidity range
1.2.9 Reliability
Total Print Volume : 16,000 pages (A4, Letter)
or 5 years although less than 16,000 pages printing
Print Head Life : 3 billion dots/nozzle
1.2.10 Safety Approvals
[120V Version]
Safety Standards : UL1950
CSA22.2 No.950
EMI : FCC part15 subpart B Class B
CSA C108.8 Class B
[220∼240V Version]
Safety Standards: : EN60950 (VDE)
EMI : EN55022 (CISPR Pub.22) Class B
AS/NZS 3548 Class B
1.2.11 Acoustic Noise
Level : Approx. 45dB(A) (According to ISO 7779)
1.2.12 CE Marking
[220∼240V 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
10 27 30 35 40
20
Temperature (°C)
20
30
40
50
90
80
70
60
Humidity (%)

EPSON Stylus PHOTO 810/820 Revision A
PRODUCT DESCRIPTION INTERFACE 18
1.3 INTERFACE
The EPSON Stylus PHOTO 810/820 provides USB and parallel interface as standard.
1.3.1 Parallel Interface (Forward Channel)
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
No ink-cartridge
Maintenance request
PE signal is at high level during paper-out error.
Figure 1-8. Data transmission timing
* Rise and fall time of every output signals
** Rise and fall time of every input signals
*** Typical timing of tack is shown on the following page.
Table 1-9. Data transmission timing
Parameter Minimum Maximum
tsetup 500ns -
thold 500ns -
tstb 500ns -
tready 0 -
tbusy - 500ns
tt-out* -120ns
tt-in** - 200ns
treply 0 -
tack 500ns 10us
tnbusy 0 -
tnext 0 -
DATA data byte n data byte n+1
-STROBE
BUSY
-ACKNLG
thold
tsetup tstb
tready tbusy
treply tack tnbusy
tnext

EPSON Stylus PHOTO 810/820 Revision A
PRODUCT DESCRIPTION INTERFACE 19
* 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 or exceeding 3.0V when the
printer is powered on. The receiver shall provide an impedance
equivalent to 7.5K ohm to ground.
Table 1-10. Typical time of tack
Parallel I/F mode Typical time of tack
High Speed 0.5us
Normal Speed 2us
Table 1-11. 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
Table 1-12. 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.
Each signal is at high level when data is
logical 1 and low level 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 This signal is a negative pulse indicating
that the printer can accept data again.
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 50us 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 +5V via 3.9 K ohm resistor.

EPSON Stylus PHOTO 810/820 Revision A
PRODUCT DESCRIPTION INTERFACE 20
NOTE: In/Out refers to the direction of signal flow from the printer’s point of
view.
35 +5V - Out Pulled up to +5V via 3.3K ohm resistor.
17 Chassis GND - - Chassis GND.
16,33,
19-30 GND - - Signal GND.
15,34 NC - - Not connected.
Table 1-12. Connector pin assignment and signals (continued)
Pin No. Signal name Return
GND pin In/Out Functional description