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istered trademark of SEIKO EPSON CORPORATION.
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PRECAUTIONS
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Precautionary notations throughout the text are categorized relative to 1)Personal injury and 2) damage to equipment.
DANGER
WARNING
The precautionary measures itemized below should always be observed when performin
Signals a precaution which, if ignored, could result in serious or fatal personal injury. Great caution should be exercised in
performin
Signals a precaution which, if ignored, could result in damage to equipment.
procedures preceded by DANGER Headings.
repair/maintenance procedures.
DANGER
1. ALWAYS DISCONNECT THE PRODUCT FROM THE POWER SOURCE AND PERIPHERAL DEVICES PERFORMING ANY
MAINTENANCE OR REPAIR PROCEDURES.
2. NOWORK SHOULD BE PERFORMED ON THE UNIT BY PERSONS UNFAMILIER WITH BASIC SAFETY MEASURES AS DICTATED FOR
ALL ELECTRONICS TECHNICIANS IN THEIR LINE OF WORK.
3. WHEN PERFORMING TESTING AS DICTATED WITHIN THIS MANUAL, DO NOT CONNECT THE UNIT TO A POWER SOURCE UNTIL
INSTRUCTED TO DO SO. WHEN THE POWER SUPPLY CABLE MUST BE CONNECTED, USE EXTREME CAUTION IN WORKING ON
POWER SUPPLY AND OTHER ELECTRONIC COMPONENTS.
WARNING
1. REPAIRS ON EPSON PRODUCT SHOULD BE PERFORMED ONLY BY AN EPSON CERTIFIED REPAIR TECHNICIAN.
2. MAKE CERTAIN THAT THE SOURCE VOLTAGES IS THE SAME AS THE RATED VOLTAGE, LISTED ON THE SERIAL NUMBER/
RATING PLATE. IF THE EPSON PRODUCT HAS A PRIMARY AC RATING DIFFERENT FROM AVAILABLE POWER SOURCE, DO NOT
CONNECT IT TO THE POWER SOURCE.
3. ALWAYS VERIFY THAT THE EPSON PRODUCT HAS BEEN DISCONNECTED FROM THE POWER SOURCE BEFORE REMOVING OR
REPLACING PRINTED CIRCUIT BOARDS AND/OR INDIVIDUAL CHIPS.
4. IN ORDER TO PROTECT SENSITIVE MICROPROCESSORS AND CIRCUITRY, USE STATIC DISCHARGE EQUIPMENT, SUCH AS
ANTI-STATIC WRIST STRAPS, WHEN ACCESSING INTERNAL COMPONENTS.
5. REPLACE MALFUNCTIONING COMPONENTS ONLY WITH THOSE COMPONENTS BY THE MANUFACTURE; INTRODUCTION OF
SECOND-SOURCE ICs OR OTHER NONAPPROVED COMPONENTS MAY DAMAGE THE PRODUCT AND VOID ANY APPLICABLE
PREFACE
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This manual describes basic functions, theory of el ectrical and mechanical operations, maintenance and repair pro cedures of Stylus Color 440/640/
740. The instructions and procedures included herein are intended for the experienced repair technicians, and attention should be
precautions on the precedin
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.
iven to the
CHAPTER 6.MAINTENANCE
Provides preventive maintenance procedures and the lists of Epson-approved lubricants and
adhesives required for servicing the product.
APPENDIX
Provides the following additional information for reference:
• Connector pin assignments
• Electric circuit boards components layout
• Exploded diagram
• Electrical circuit boards schematics
REVISION STATUS
Rev.DatePage(s)Contents
A1998/07/15AllFirst Release
B1998/09/30Page 188
Pages 195 to 212
The exploded diagrams and part list for the Stylus Color 740 has been added.
Product Description
Features ................................... ....... ...... ....... ...... ....... .............................. 9
EPSON Stylus Color 440/640/740 are designed for PC users at home
and low price for hat high performance. Also, Stylus Color 440 printer
has the same high color print quality (720 X 720dpi) as Stylus ProXL,
and Stylus Color 640,740 have the same high color pri nt quality ( 1440 X
720) as Stylus Color 600 and Stylus Pro 5000. The major printer
features are;
High color print quality
720 (H) x 720 (V) dpi printing (for Stylus Color 440)
1440 (H) X 720 (V) dpi printing (for Stylus Color 640,740)
4 color printing (YMCBk)
Traditional and New Microwave
Black 64 nozzles, CMY 21 nozzles (for Stylus Color 440)
Black 64 nozzles, CMY 32/color nozzles (for Stylus Color 640)
Black 144 nozzles, CMY 48/color nozzles (for Stylus Color 740)
Built-in auto sheet feeder
Holds 100 cut-sheets (55g/m
2
)
Compact size
429mm (W) x 231mm (D) x 155mm (H) (for Stylus Color 440)
429mm (W) x 231mm (D) x 157mm (H) (for Stylus Color 640)
429mm (W) x 261mm (D) x 157mm (H) (for Stylus Color 740)
Stylus Color 4401080200 CPS--Stylus Color 6401080200 CPS400 CPS
Stylus Color 7401080200 CPS---
Character
Pitch
Printable
Column
LQ SpeedDraft Speed
Chapter 1Product Description11
EPSON Stylus Color 440/640/740Revision A
Y1
Y2
Y3
Y4
Y19
Y20
Y21
M 1
M 2
M 3
M 4
M 19
M 20
M 21
#1
90DPI
#3
#5
10.16 mm2.2578 mm
7.9022 mm
C1
C2
C3
C4
C19
C20
C21
#23
#25
#27
#29
#59
#61
#63
#2
#4
#6
2.2578 mm
#24
#26
#60
#62
#64
180DPI
Y1
Y2
Y3
2.2578 mm
Y12
Y13
Y14
Y15
Y30
Y31
Y32
M1
M2
M3
10.16 mm
M12
M13
M14
M15
M30
M31
M32
C1
C2
C3
7.9022 mm
C12
C13
C14
C15
C30
C31
C32
90DPI
#1
#3
#5
#23
#25
#27
#29
#59
#61
#63
#2
#4
#6
2.2578 mm
#24
#26
#60
#62
#64
180DPI
(Y)
(M)
(C)
(B2)
(B1)
(Y)
(M)
(C)
(B2)
(B1)
Figure 1-1. Nozzle Configuration for Stylus Color 440
Figure 1-2. Nozzle Configuration for Stylus Color 640
Chapter 1Product Description12
EPSON Stylus Color 440/640/740Revision A
Feeding method
32/360"
#1
#2
#3
#4
#5
#6
#7
#8
#9
#10
#11
112/360"
#1
#2
#3
#4
#5
#6
#7
#8
#9
#10
#11
32/360"
#1
#2
#3
#4
#5
#6
#7
#8
#9
#10
#11
112/360"
#1
#4
#7
#10
#13
#16
#19
#22
#25
#28
#31
32/360"
#2
#5
#8
#11
#14
#17
#20
#23
#26
#29
#32
#3
#6
#9
#12
#15
#18
#21
#23
#26
#29
#32
Friction feed with ASF
Line spacing
1/6 inches or programmable at 1/360 inches (only for Stylus
Color 440)
1/6, 1/8 inches or programmable at 1/360 inches (for Stylus
Color 640,740)
Paper path
Cut-sheet ASF (Top entry)
Feeding speed
<Stylus Color 440, 640>
190 ms (1/3 inch)
2.0 inches/seconds (continuous)
<Stylus Color 740>
110 ms (10.16 mm)
114.3 mm/second (Continuous)
Ink supply
Exclusive ink cartridge (Black and CMY)
(B1)
#139
#142
(B2)
#140
#141
#143
#144
(B3)
#47
#48
#47
#48
(M)(Y)
#47
#48
(C)
Figure 1-3. Nozzle Configuration for Stylus Color 740
Chapter 1Product Description13
EPSON Stylus Color 440/640/740Revision A
Paper holding capacity of Hopper
Size:Index card ∼Legal
Thickness:Less than 8mm
Paper capacity:100 Cut sheets
10 Envelopes
65 Coated papers (360 dpi)
65 Coated papers (720 dpi)
20 Glossy papers, Photo Paper
10 Transparent sheets
30 Index cards
1 Panoramic Photo Paper, Iron-On Cool Peel
Transfer Paper, and Photo Sticks,
Glossy Film, Self Adhesive
Character tables:2 international character sets (Not Opened)
<Stylus Color 440, 640>
PC437 (US, Standard Europe)
PC850 (Multilingual)
Typeface
Bit map LQ font:EPSON Courier 10CPI
<Stylus Color 740>
Standard version:11 character tables
Italic table, PC437 (US Standard, Europe), PC 850
(Multilingual), PC860 (Portuguese), PC861 (Icelandic), PC863
(Canadian-French), PC865 (Nordic), Abicomp, BRASCII,
Roman 8, ISO Latin 1
NLSP Version:30 character tables
NOTE:*1 is not opened. These character tables can not be selected in
NOTE:The above typeface has 4 variations individually as follows;
Bulgaria, ic), PC774, Estonia, ISO 8859-2, PC866-LAT, PC866 UKR,
Scaleable font:
EPSON Roman10.5pt., 8pt. to 32 pt. (every 2 pt. unit)
EPSON Sans Serif10.5pt., 8pt. to 32 pt. (every 2 pt. unit)
EPSON Roman T10.5pt., 8pt. to 32 pt. (every 2 pt. unit)
EPSON Sans Serif H 10.5pt., 8pt. to 32 pt. (every 2 pt. unit)
EPSON Roman, EOSON Roman bold
EPSON Roman Italic, EPSON Roman bold Italic
Control code
<Stylus Color 440, 640>
ESC/P Raster
EPSON Remote command
<Stylus Color 740>
ESC/P2 and ESC/P Raster
EPSON Remote command
Italic table, PC437, PC437 Greek, PC 850, PC852, PC853, PC855,
PC857, PC860, PC861, PC865, PC866, ISO8859-7, ISO Latin 1T,
Chapter 1Product Description14
EPSON Stylus Color 440/640/740Revision A
1.2.2 Paper Specification
This section describes the printa ble area and types of paper that can be
used in this printer.
1.2.2.1 Cut Sheet
[Size]
A4:[Width 210mm (8.3”) x Length 297mm (11.7”)]
Letter: [Width 216mm (8.5”) x Length 279mm (11.0”)]
B5:[Width 182mm (7.2”) x Length 257mm (10.1”)]
Legal: [Width 216mm (8.5”) x Length 356mm (14.0”)]
Statement: [Width]139.7mm (5.5”) x Length 215.9mm (8.5”)]
Exclusive: [Width 190.5mm (7.5”) x Length 254mm (10”)]
[Thickness]
0.08mm (0.003”) - 0.11mm (0.004”)
[Weight]
2
64g/m
(17Ib.) - 90g/m2 (24Ib.)
1.2.2.2 Transpa rency, Glossy Paper
[Size]
A4:[Width 210mm (8.3”) x Length 297mm (11.7”)]
Letter:[Width 216mm (8.5”) x Length 279mm (11.0”)]
[Thickness]
0.075mm(0.003”) - 0.085mm(0.0033”)
NOTE:Transparency printing is only available at normal temperature.
1.2.2.3 Envelope
[Size]
No.10 Width 241mm (9 1/2”) x Length 104.8mm (4 1/8”)
DL Width 220mm (8.7”) x Length 110mm (4.3”)
C6 Width 162mm (6.4”) x Length 114mm (4.5”)
[Thickness]
0.16mm (0.006”) - 0.52mm (0.02”)
[Quality]
Exclusive paper, Bond paper, PPC
[Weight]
2
45g/m
[Quality]
Bond paper, Plain paper, Air mail
(12Ib.) - 75g/m2 (20Ib.)
NOTE 1 Envelope printing is only available at normal temperature.
NOTE 2 Keep the longer side of the envelope horizontally at setting.
Chapter 1Product Description15
EPSON Stylus Color 440/640/740Revision A
1.2.2.4 Index Card
[Size]
A6 Index card: Width 105mm (4.1”) x Length 148mm (5.8”)
A5 Index card: Width 148mm (5.8”) x Length 210mm (8.3”)
5x8” Index card: Width 127mm (5.0” x Length 203mm (8.0”)
10x8” Index card: Width 127mm (5.0”) x Length 203mm (8.0”)
[Thickness]
: Less than 0.23mm (0.0091”)
Chapter 1Product Description16
EPSON Stylus Color 440/640/740Revision A
1.2.3 Printing Area
[Cut Sheet]
See Figure 1-4 in the right column and the tables in the following page
for the printable areas for Raster Graphics mode and Character mode.
NOTE:Character mode is only suitable for Stylus Color 740.
LM
PW
Printable
Area
RM
TM
PL
BM
Figure 1-4. Printable Area for Cut sheet
Chapter 1Product Description17
EPSON Stylus Color 440/640/740Revision A
Table 1-4. Raster Graphics Mode (for 3 models)
Paper SizePWPLLMRMTMBM/min.
A4210 mm (8.3”)297 mm (11.7”)3 mm (0.12”)3 mm (0.12”)3 mm (0.12”)
Letter216 mm (8.5”)279 mm (11.0”)3 mm (0.12”)9 mm (0.35”)3 mm (0.12”)
B5182 mm (7.2”)257 mm (10.1”)3 mm (0.12”)3 mm (0.12”)3 mm (0.12”)
Legal216 mm (8.5”)356 mm (14.0”)3 mm (0.12”)9 mm (0.35”)3 mm (0.12”)
Statement139.7 mm (5.5”)215.9 mm (8.5”)3 mm (0.12”)3 mm (0.12”)3 mm (0.12”)
Exclusive190.5 mm (7.5”)254 mm (10”)3 mm (0.12”)3 mm (0.12”)3 mm (0.12”)
14 mm(0.54”)
3 mm (0.12”)
14 mm (0.54”)
3 mm (0.12”)
14 mm (0.54”)
3 mm (0.12”)
14 mm (0.54”)
3 mm (0.12”)
14 mm (0.54”)
3 mm (0.12”)
14 mm (0.54”)
3 mm (0.12”)
Table 1-5. Character Mode (only for Stylus Color 740)
Table 1-6 and Figure 1-5 show the printable area for envelopes.
Table 1-6. Envelopes Margin
Paper SizeLMRMTMBM/min.
#1028 mm (1.10”)3 mm (0.12”)3 mm (0.12”)
DL7 mm (0.28”)3 mm (0.12”)3 mm (0.12”)
C63 mm (0.12”)3 mm (0.12”)3 mm (0.12”)
LM
14 mm (0.54”)
3 mm (0.12”)
14 mm (0.54”)
3 mm (0.12”)
14 mm (0.54”)
3 mm (0.12”)
RM
Printable
Area
TM
BM
1.2.3.1 Adjust Lever Setting
The adjustment lever located on the right side (dark blue) under the
printer cover needs to be set to the proper position accord ing to the
paper you print. (Refer to the Tabl e 1-7.) Al so, if t here is any dirt caus ed
by friction on the way or wrinkled paper, this can be prevented by
changing the lever position to rear position (marked with “+”) in spite of
paper types.
Table 1-7. Adjust Lever Setting
Lever PositionClearance between head and platen
Plus Position1.04 mm
Zero Position1.74 mm (+0.7 mm)
NOTE:Return the adjust lever to the zero position, which is normal
position, after you finish printing on all media. Leaving the lever
in the plus position may cause the printed image to have gaps
on other media.
Figure 1-5. Printable Area for Envelopes
Chapter 1Product Description19
EPSON Stylus Color 440/640/740Revision A
18.3
38.5
51.2
19.8
52.7
27.8
52.7
38.5
51.2
26.3
18.3
38.5
51.2
19.8
52.7
for Stylus C olor 440, 640
for Stylus C olor 740
1.2.4 Ink Cartridge Specifications
[Black Ink Cartridge]
Table 1-8. Black Cartridge Specifications
ItemsSpecifications
TypeExclusive Cartridge for Stylus Color 440, 640
Exclusive Cartridge only for Stylus Color 740
ColorBlack
Print Capa city<Stylus Color 440,640>
Validity2 years (sealed in package) / 6 months (out of package)
Environmental
conditions
WeightTotal Ink Cartridge: 30 g
540 pages / A4 (ISO/IEC 10561 Letter Pattern at 360 dpi)
<Stylus Color 740>
900 pages / A4 (ISO/IEC 10561 Letter Pattern at 360 dpi)
• Temperature
- Storage: -20°C~40°C (within a month at 40 °C)
- Packing storage: -30°C~40°C (within a month at 40 °C)
- Transit: -30°C~60°C (within 120 hours at 60°C and within
a month at 40°C)
• Humidity
5% to 85% (without condensation)
Note:
Ink freezes below -3°C, but it returns to normal after 3 hours at
room temperature. (25 °C)
• Dimension
<Stylus Color 440,640>
19.8 mm (W) X 52.7 mm (D) X 38.5 mm (H)
<Stylus Color 740>
27.8 mm (W) X 52.7 mm (D) X 38.5 mm (H)
Total Ink: 16.4 +/-0.5 g
Consumable Ink weight: more than 12.1 g
Figure 1-6. Black Ink Cartridge Appearance
Chapter 1Product Description20
EPSON Stylus Color 440/640/740Revision A
[Color Ink Cartridge]
Table 1-9. Color I/C Specifications
ItemsSpecifications
TypeExclusive Cartridge for Stylus Color 440, 640, 740
ColorCMY
Print Capacity300 pages / A4 (360 dpi, 5% duty each colors)
Validity2 years (sealed in package) / 6 months (out of package)
Environmental
conditions
• Temperature
- Storage: -20°C~40°C (within a month at 40 °C)
- Packing storage: -30°C~40°C (within a month at 40 °C)
- Transit: -30°C~60°C (within 120 hours at 60°C and within a
month at 40°C)
•Humidity
5% to 85% (without condensation)
Note:
Ink freezes below -3°C, but it returns to normal after 3 hours at
room temperature. (25 °C)
• Dimension
42.9 mm (W) X 52.7 mm (D) X 38.5 mm (H)
WeightTotal Ink Cartridge: 67 g
Total Ink: 12.8 +/-0.5 g/colors
Consumable Ink weight: more than 9.6 g/colors
52.7
42.9
43.2
51.2
38.5
41.4
Figure 1-7. Color Ink Cartridge
Chapter 1Product Description21
EPSON Stylus Color 440/640/740Revision A
1.2.5 Environmental Condition
Temperature
Operating :10 to 35 °C (Refer to Figure 1-8 for condition)
Non-operating:-20 to 60 °C (with shipment container)
NOTE: 1 month at 40 °C and 120 hours at 60 °C
Humidity
Operating:20% ~ 80% RH
(without condensation Refer to Figure 1-8 for condition)
Resistance to shock
Operating:1G, within 1 ms
Non-operating:2G, within 2 ms
Resistance to vibration
Operating:0.15G (Operating)
Non-operating:0.50G (Non-Operating)
X,Y,Z directions
X,Y,Z directions (with shipment container)
Non-operating:5% ~ 85% RH
(without condensation and with shipment container)
Humidity
(% RH)
80%
55%
20%
Figure 1-8. Temperature / Humidity of Range
Guaranteed
Area
102735
50
80
95
NOTE 1:During non-operating, make sure that the head is capped.
NOTE 2:During the transport, make sure that the head is capped and
ink cartridge is installed to the printer.
NOTE 3: If the head is not capped at the powe r-off sta te, tur n the power
on with installed ink cartridge and turn off the power after
confirming that Power on operati on is completed and the head
is capped.
NOTE 4: Ink will be frozen less than -3°C environment, however it
will be usable after placing it more than 3 hours at 25°C.
( C )
( F )
Chapter 1Product Description22
EPSON Stylus Color 440/640/740Revision A
1.2.6 Electric Specification
[120V version]
[Rated voltage]AC120V
[Input voltage range]AC99∼132V
[Rated frequency range] 50∼60Hz
[Input frequency range]49.5∼60.5 Hz
[Rated current0.4A (Max. 0.5A)
[Power consumption]Approx.15W (ISO/IEC 10561 Letter pattern)
Energy Star compliant
[Insulation Resistance] 10M ohms min.
(between AC line and chassis, DC 500 V)
[Dielectric strength]AC1000 V rms. 1 minute or AC1200 Vrms.
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∼60.5 Hz
[Rated current]0.2 A (Max. 0.3A)
[Power consumption]Approx.15W (ISO/IEC 10561 Letter pattern)
Energy Star compliant
[Insulation Resistance]10M ohms min.
(between AC line and chassis, DC500V)
[Dielectric strength]AC1500 V rms.
1 minute (between AC line and chassis)
1.2.7 Reliability
[Total print volume]
Stylus Color 440:10,000 pages (A4, Letter)
Stylus Color 640:25,000 pages (A4, Letter)
Stylus Color 740:75,000 pages (A4, Letter)
[Print head life]
Stylus Color 440:2000 million dots/nozzle
Stylus Color 640:2000 million dots/nozzle
Stylus Color 740:4000 million dots/nozzle
1.2.8 Safety Approvals
[120V version]
Safety standardUL1950 with D3
CSA22.2 No.950 with D3
EMIFCC part 15 subpart B class B
CSA C108.8 class B
[220∼240V]
Safety standardEN 60950 (VDE,NEMKO)
EMIEN55022 (CISPR Pub.22) class B
AS/NZS 3548 class B
Chapter 1Product Description23
EPSON Stylus Color 440/640/740Revision A
1.2.9 Acoustic Noise
Stylus Color 440:Approximately 45 dB
Stylus Color 640,740: Approximately 47 dB
1.2.10 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
1.2.11 Input Data Buffer
10 K byte (for Stylus Color 440)
32 K byte (for Stylus Color 640)
64 K byte (for Stylus Color 740)
Chapter 1Product Description24
EPSON Stylus Color 440/640/740Revision A
1.3 Interface
This printer provides parallel i nterface as standard.
BUSY signal is set high before setting either/ERROR low or PE high
and held high until all these signals retur n 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
8 bit parallel, IEEE-1284 compatibility mode
By /STOPBE pulse
BY BUSY and /ACKLG signal
TTL compatible level
57-30360 (amphenol) or equivalent
See Table 1-10 in the following page which shows the signal and
connector pin assignments f or paralle l interface (forward channel *1) . In
case of these signals, twist pair line is used and returning side is
connected to signal GND.
*1: Forward channel is the mode when the ordi nary data such as an order
to print is sent from the PC to the printer.
During printer error (See /ERROR signal)
/ERROR signal is at low level when the printer is in one of the fol lowing
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.
Chapter 1Product Description25
EPSON Stylus Color 440/640/740Revision A
Table 1-10. Parallel I/F Forward Channel
Pin No.
1/STROBE19I
2-9DATA0-720-27I
10/ACKNLG28O
11BUSY29O
12PE28OA high signal indicates paper-out error.
13SLCT28O
14/AFXT30INot used.
31/INIT30I
32/ERROR29O
36/SLIN30INot used.
18Logic H----OPulled up to +5V via 3.9K ohm resistor.
35+5V----OPulled up to +5V via 3.9K ohm resistor.
17
16,33,
19-30
15,34NC-------Not connected.
Signal
Name
Chassis
GND
GND-------Signal GND.
Note) In and Out refer to the direction of signal flow from the printer’s point of view.
Return
GND Pin
-------Chassis GND.
In/OutFunctional Description
The strobe pulse. Read-in of data is
performed at the falling edge of this
pulse.
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.
This signal is a negative pulse indicating
that the printer can again accept data.
A high signal indicates that the printer
cannot receive data.
Always at high level when the printer is
powered on.
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.
00H:Request Nibble Mode Reverse Channel Transfer.
04H:Request device ID; Return Data using Nibble Mode Rev
Channel Transfer.
IEEE-1284 nibble mode
Refer to the IEEE-1284 specification
Refer to the IEEE-1284 specification
Refer to the IEEE-1284 specification
IEEE-1284 level 1 device
TTL compatible level
57-30360 (amphenol) or equivalent
The printer responds affirmatively when
the extensibility request values are 00H or
04H, that mean;
NOTE:The printer sends following device ID string when it is requested.
Table 1-11. Details of Device ID
00H3CHContents
MGFEPSON;Production Maker
CMDESCPL2,BDC;Command system
Stylus[SP]Color[SP] 440;
MDL
CLSPRINTER;Class
NOTE:
NOTE:
[00H] denotes a hexadecimal value of zero. MDL value depends on the
EEPROM setting.
MDL value depends on the EEPROM setting. Model name can be changed by
changing a certain address in the EEPROM.
Stylus[SP]Color[SP] 640;
Stylus[SP]Color[SP] 740;
Model name
Table 1-12 shows pin assignment for reverse channel (*3). In these
case of signals, twist pair lin e is used and returni ng side is connect ed to
Signal GND.
*3: Reverse channel is the mode that any data is transferred from th e
printer to the PC.
Chapter 1Product Description27
EPSON Stylus Color 440/640/740Revision A
Table 1-12. Parallel I/F Reverse Channel
Pin No.Signal Name
1HostClk19IHost clock signal.
2-9Data0-720-27I
10PrtClk28OPrinter clock signal.
11PtrBusy, Data Bit-3,729O
31/INIT30INot used.
32/DataAvail, DataBit-0,429O
361284-Active30I1284 Active Signal
18Logic-H----OPulled up to +5V via 3.9K ohm resister.
35+5V----OPulled up to +5V via 3.3K ohm resister.
17Chassis GND-------Chassis GND.
16,33, 9-30GND-------Signal GND.
15,34NC-------Not connected.
Note) In/Out refers to the direction of signal flow from the printer’s point of view.
Return GND
Pin
In/OutFunctional Description
The DATA0 through DATA7 signals represent data
bits 0 to7, respectively. Each signal is at high level
when data is logical 1 and low level when data is
logical 0. These signals are used to transfer the 1284
extensibility request values to the printer.
Printer busy signal and reverse channel transfer data
bit 3 or 7.
Acknowledge data reque st sign al and rev erse ch annel
transfer data bit 2 or 6.
X-flag signal and reverse cha nn el transf er data bit 1 or
5.
Data available signal and reverse channel transfer
data bit 0 or 4.
Chapter 1Product Description28
EPSON Stylus Color 440/640/740Revision A
The following are the points to note when using the parallel Interface.
NOTE 1:“Return GND pin” in the table means twist pair return and is
used for all control signals except for Logi c H,+5V, Chassis,
GND and NC. In this twist pair return, returning side is
connected to GND (16,33, 19-30 pi n) for t wist pair ret urn. Also,
these cables are shielded wires and it is effective to connect to
each chassis GND in the PC and printer for electrostati c noise.
NOTE 2:Conditions for Interface are based on TTL level. Rise and fall time
should be within 0.2µs.
NOTE 3:Refer to Figure 1-9 for transmission timing of each signals.
NOTE 4:Do not perform data transmission ignoring /ACK or BUSY
signal. (Perform the data transmission after confirming that /
ACK and BUSY signals are Low.)
NOTE 5:It is possible to per form the printing test including interfac e circuit
without using equipment from outside when 8-bit data signal
(20-27 pin) is set to appropriate word code and connect them
forcefully to /ACK and /STRB.
Data
/STROBE
BUSY
/ACKNLG
Byte Data n
Tsetup
Tstrb
TreadyTbusy
Thold
Treply
TackTnbusy
Byte Data n+1
Tnext
Figure 1-9. Data Transmission Timing for Forward Channel
Table 1-13.
Maximum and Minimum Timing for Data Transmission
ParameterMinimumMaximum
tsetup500ns---
thold500ns---
tstb500 ns---
tready0---
tbusy---500ns
tt-out*---120ns
tt-in**---200ns
treply0---
tack500ns10us
tnbusy0---
tnext0---
* Rise and fall time of every output signal.
** Rise and fall time of every input signal. Typical timing for the tack
parameter is shown below.
Chapter 1Product Description29
EPSON Stylus Color 440/640/740Revision A
Table 1-14. Typical Tack Timing
Parallel I/F ModeTypical Tack Timing
High speed
Normal speed
2us (for Stylus Color 440,640)
1us (only for Stylus Color 740)
4us (for Stylus Color 440,640)
3us (only for Stylus Color 740)
Table 1-15. Signal level for TTL (IEEE-1284 level 1 device)
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.
1.3.2.1 Prevention Hosts from Data Transfer time-out
Generally, hosts abandon data t ransfer to periph erals when a peripheral
is in the busy state for dozens of seconds continuously. To prevent
hosts this kind of ti me-out, the print er receives dat a very s lowly, seve ral
bytes per minute, even if the printer is in busy state. This showdown 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.
1.3.2.2 Auto Interface Selection (for Stylus Color 640, 740)
Manual Selection:
One of two interfaces can be selected by the default setting mode.
Automatic Selection:
The automatic interface selection is enabled by the default setting
mode. 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 an d the pr inter is in the
stand-by state for the seconds, the printer is ret u rned to the idle
state. As long as the host sends data or the printer interf ace is busy
state, the selected interface is let as it is.
Following explains conditions of other inte rfaces when a particular
interface is selected.
When the parallel interface is not selected, the interface gets
into BUSY state. At this time, LH s ignal is set to “ L”. That means
blocking power supply and no responds from 1284. Therefore, it
is necessary for the host, which requires Reverse transfer, to
check LH state.
When the serial interface is not selected, the interface sets the
DTR signal MARK.
When the printer is initialized or returned to the idl e state,
Parallel interface becomes the ready condition and DTR of serial
interface becomes SPACE (Low) condition and reset off-line bit
of Main Status Register (MNSTS)to, option interface.
Chapter 1Product Description30
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