Epson Stylus pro 7700m User manual

EPSON COLOR INKJET PRINTER
Stylus Pro
SERVICE MANUAL
EPSON 4004825

NOTICE
All rights reserved. Reproduction of any part of this manual in any form whatsoever without SEIKO
EPSON’s express written permission is forbidden.
The contents of this manual are subjects to change without notice.
All efforts 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 notwithstanding SEIKO EPSON can assume no responsibility for any errors in this manual or
the consequence thereof.
Epson is a registered trademark of Seiko Epson Corporation.
General Notice: Other product names used herein are for identication purposes only and may be trademarks
of their respective campanies.
Copyright © 1995 by SEIKO EPSON CORPORATION Nagano, Japan
-i-

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/ mainte-
nance procedures.
DANGER
1. ALWAYS DISCONNECT THE PRODUCT FROM BOTH THE POWER SOURCE AND PERI-
PHERAL DEVICES PERFORMING ANY MAINTENANCE OR REPAIR PROCEDURE.
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 CON-
NECT 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 CERTI-
FIED REPAIR TECHNICIAN.
2. MAKE CERTAIN THAT THE SOURCE VOLTAGE 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 CON-
NECT 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 NONAP-
PROVED COMPONENTS MAY DAMAGE THE PRODUCT AND VOID ANY APPLICABLE
EPSON WARRANTY.
-ii-

PREFACE
This manual describes functions, theory of electrical and mechanical operations, maintenance, and repair of
STYLUS-PRO.
The instructions and procedures included herein are intended for the experience repair technician, and attention
should be given to the precautions on the preceding page. The chapters are organized as follows:
CHAPTER 1. GENERAL DESCRIPTION
Provides a general product overview, lists specifications, and illustrates the main components of the printer.
CHAPTER 2. OPERATING PRINCIPLES
Describes the theory of printer operation.
CHAPTER 3. DISASSEMBLY AND ASSEMBLY
Includes a step-by-step guide for product disassembly and assembly.
CHAPTER 4. ADJUSTMENTS
Includes a step-by-step guide for adjustment.
CHAPTER 5. TROUBLESHOOTING
Provides Epson-approved techniques for adjustment.
CHAPTER 6. MAINTENANCE
Describes preventive maintenance techniques and lists lubricants and adhesives required to service the equipment.
APPENDIX
Describes connector pin assignments, circuit diagrams, circuit board component layout and exploded diagram.
The contents of this manual are subject to change without notice.
-iv-

REVISION SHEET
Revision Issue Date Revision Page
Rev. A May 30, 1995 - 1st issue
Rev. B June 5, 1995 1 - 2, 4-7
&4-10 Change Fig.1-2 and WARNINGs
-v-

TABLE OF CONTENTS
CHAPTER 1. GENERAL DESCRIPTION
CHAPTER 2. OPERATING PRINCIPLES
CHAPTER 3. DISASSEMBLY AND ASSEMBLY
CHAPTER 4. ADJUSTMENTS
CHAPTER 5. TROUBLESHOOTING
CHAPTER 6. MAINTENANCE
APPENDIX
-vi-

Chapter 1 Product Description
Table of Contents
1.1 FEATURES 1-1
1.2 SPECIFICATIONS 1-2
1.2.1 Printing Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
1.2.2 Paper Handling Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
1.2.3 Paper Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
1.2.4 Ink Cartridge Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
1.2.5 Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
1.2.6 Environmental Conditions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
1.2.7 Reliability. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
1.2.8 Safety Approvals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
1.2.9 Physical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
1.3 INTERFACE SPECIFICATIONS 1-9
1.3.1 Parallel Interface Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9
1.3.2 Serial Interface Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11
1.4 OPERATIONS 1-12
1.4.1 Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12
1.4.2 Panel Operation at Power On . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13
1.4.3 Default Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14
1.4.3.1 Default Setting Items. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14
1.4.3.2 Changing the Default Settings . . . . . . . . . . . . . . . . . . . . . . . . . 1-15
1.4.4 Error Conditions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-17
1.4.5 Printer Initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-17
1.4.5.1 Hardware Initialization. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-17
1.4.5.2 Software Initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-17
1.4.5.3 Panel Initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-17
1.5 MAIN COMPONENTS 1-18
1.5.1 Main Control Board (C164 MAIN Board) . . . . . . . . . . . . . . . . . . . . . . . 1-18
1.5.2 Power Supply Board (C137 PSB/PSE Board) . . . . . . . . . . . . . . . . . . . 1-19
1.5.3 Control Panel (C137 PNL Board) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-19
1.5.4 Printer Mechanism (M-4A11). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-20
1.5.5 Housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-20

List of Figures
Figure 1-1. Exterior View of the Stylus Color Pro. . . . . . . . . . . . . . . . . . . . . 1-1
Figure 1-2. Nozzle Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Figure 1-3. Printable Area for Cut Sheets . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
Figure 1-4. Printable Area for Envelopes. . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
Figure 1-5. Adjustment Lever Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
Figure 1-6. Temperature/Humidity Range . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
Figure 1-7. Data Transmission Timing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9
Figure 1-8. Control Panel Appearance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12
Figure 1-9. C164 MAIN Board Component Layout . . . . . . . . . . . . . . . . . . . 1-18
Figure 1-10. C137 PSB/PSE Component Layout. . . . . . . . . . . . . . . . . . . . . 1-19
Figure 1-11. C137 PNL Board Component Layout . . . . . . . . . . . . . . . . . . . 1-19
List of Tables
Table 1-1. Print Speed and Printable Columns . . . . . . . . . . . . . . . . . . . . . . . 1-2
Table 1-2. Character Tables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Table 1-3. Cut Sheet Paper Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Table 1-4. Envelope Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Table 1-5. Adjust Lever Setting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
Table 1-6. Rated Electrical Ranges. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
Table 1-7. Acceptable Environmental Conditions. . . . . . . . . . . . . . . . . . . . . 1-7
Table 1-8. Signal and Connector Pin Assignments for Parallel Interface 1-10
Table 1-9. DTR and X-ON/X-OFF Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11
Table 1-10. Signal and Connector Pin Assignments for Serial Interface . 1-11
Table 1-11. Default Setting Items . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14
Table 1-12. Characteristics of Print Direction Mode. . . . . . . . . . . . . . . . . . 1-14
Table 1-13. Printing Direction and ESC U Command . . . . . . . . . . . . . . . . . 1-14
Table 1-14. Language Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15
Table 1-15. Feature Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15
Table 1-16. Character Table Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16
Table 1-17. Error Indications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-17
Table 1-18. The Comparison between C164 MAIN and C162 MAIN . . . . . . 1-18

1.1 FEATURE
The Stylus Pro is a high-performance color ink jet printer with a small footprint and low cost. The main
components of this printer are similar to the Stylus Color. The main features are:
r High quality color print Super dot 720 dpi printing
Plain paper 720 dpi printing
Special coated paper for 720 dpi printing
r High print speed LQ printing at 200 cps
r Built-in auto sheet feeder Holds 100 cut sheets (55 g/m2)
Holds 10 envelopes
Holds 50 transparency film sheets
Holds 70 sheets of special paper
r Three built-in I/F types Macintosh Serial interface
Parallel interface (I-EEE 1284-compatible)
Type-B interface (optional)
Note : Type-B interfaces are available, except C82324*(ETHERNET I/F CARD for NETWARE).
* The asterisk represents the last digit, which varies by country.
r Easy to set up No DIP switches
Multilingual setting messages (5 languages)
r 4 scalable fonts,
5 LQ fonts Roman T, Sans Serif H, Roman, Sans Serif (scalable), Roman, Sans Serif, Courier, Prestige, Script (LQ)
r Character Tables Italic, PC437, PC850, PC860, PC863, PC865, PC437 Greek, PC852,
PC853, PC855, PC857, PC866, PC869, PC861, BRASCII, Abicomp,
MAZOWIA, Code MJK, ISO 8859-7, ISO Latin 1T, Bulgaria
The figure below shows the Stylus Pro.
Figure 1-1. Exterior View of Stylus Pro
Stylus Pro Service Manual Product Description
Rev.B 1-1

1.2 SPECIFICATIONS
This section provides statistical facts and other detailed information for the printer.
1.2.1 Printing Specifications
Print system: On demand ink jet system
Nozzle configuration: 64 nozzles (16 ×4 staggered): monochrome
48 nozzles (16 ×3 staggered): color
Printing direction: Bidirectional with logic-seeking
The table below shows print speed and printable columns.
Table 1-1. Print Speed and Printable Columns
Character Pitch Printable Columns Print Speed (LQ)
10 cpi (pica) 80 200 cps
12 cpi (elite) 96 240 cps
15 cpi 120 300 cps
17 cpi (pica condensed) 137 340 cps
20 cpi (elite condensed) 160 400 cps
Row CRow D
#2
#3
#7
#6
#62
#63
1/360"
#1
MagentaCyanYellow
#2
#3
#1
#2
#3
#1
#2
#3
#16 #16
1/90"
#16
#1
Row A Row B
#4 #5
#8
#61
#64
1/90"
Figure 1-2. Nozzle Configuration
Product Description Stylus Pro Service Manual
1-2 Rev.B

Character sets: Legal and 21 international character sets.
Character tables: See Table 1-2.
Table 1-2. Character Tables
Character Tables
Bitmap Fonts Scalable Fonts
EPSON Roman
EPSON Sans Serif
EPSON Courier
EPSON Prestige
EPSON Script
EPSON Roman
EPSON Sans Serif EPSON Roman T EPSON Sans Serif H
Italic table mmm
PC437
(U.S./Standard Europe) mmm
PC850 (Multilingual) mmm
PC860 (Portuguese) mmm
PC861 (Iceland) mmm
PC863 (Canadian-French) mmm
PC865 (Nordic) mmm
Abicomp mmm
BRASCII mmm
PC437 (Greek) mm×
PC852 (East Europe) mm×
PC853 (Turkish) mm×
PC855 (Cyrillic) mm×
PC857 (Turkish) mm×
PC866 (Russian) mm×
PC869 (Greek) mm×
MAZOWIA (Poland) mm×
Code MJK (Czecho/Slovakia) mm×
ISO 8859-7 (Greek) mm×
ISO Latin 1T (Turkish) mm×
Bulgaria (Bulgaria) mm×
mSupported ×
Not supported
Note: These character tables are not supported for EPSON Roman T and EPSON Sans Serif H
scalable fonts.
Fonts: Bitmap LQ fonts
r EPSON Roman (10 cpi/12 cpi/15 cpi/Proportional)
r EPSON Sans Serif (10/12/15/Proportional)
r EPSON Courier (10/12/15)
r EPSON Prestige (10/12/15)
r EPSON Script (10/12/15)
Scalable fonts
r EPSON Roman 10.5 points, 8 ∼32 points (in units of 2 points)
r EPSON Sans Serif 10.5 points, 8 ∼32 points (in units of 2 points)
r EPSON Roman T 10.5 points, 8 ∼32 points (in units of 2 points)
r EPSON Sans Serif H 10.5 points, 8 ∼32 points (in units of 2 points)
Control codes: ESC/P 2 and expanded raster graphics codes
Input data buffer: 64K bytes
Stylus Pro Service Manual Product Description
Rev.B 1-3

1.2.2 Paper Handling Specifications
Feeding method: Friction feed paper is fed from the built-in auto sheet feeder (ASF).
Notes: The following operations are not allowed:
1. Reverse feeding within 3 mm (0.12 in.) from the top edge of the paper or 16 mm
(0.63 in.) from the bottom edge of the paper.
2. Reverse feeding beyond 7.9 mm (0.3 in.).
Line spacing: 1⁄6-inch feed, 1⁄8-inch feed, or programmable in 1⁄360-inch minimum increments.
Paper path: Cut sheets: Built-in auto sheet feeder (ASF). Front entry.
Feeding speed: 89 msec. (at 1⁄6-inch feed pitch).
1.2.3 Paper Specifications
Table 1-3. Cut Sheet Paper Specifications
Size (W ×L)
Legal: 216 mm (8.5 in.) ×356 mm (14.0 in.)
Letter: 216 mm (8.5 in.) ×279 mm (11.0 in.)
A4: 210 mm (8.3 in.) ×297 mm (11.7 in.)
Executive: 184 mm (7.25 in.) ×267 mm (10.5 in.)
Statement :140 mm (5.5 in.) ×216 mm (8.5 in.)
Thickness 0.08 mm (0.003 in.) ∼0.11 mm (0.004 in.)
Weight 55 g/m2(17 lb) ∼90 g/m2(24 lb)
Quality Plain paper, special coated paper for 720 dpi, special coated paper for
360 dpi, transparency film, high-quality glossy paper
Note : Printing on special coated paper for 720 dpi, special coated paper for 360 dpi,
transparency film, and high-quality glossy paper is only available at normal temperatures.
Table 1-4. Envelope Specifications
Size (W ×L) C5: 229 mm (9 in.) ×162 mm (6.4 in.)
No. 10: 240 mm (9 1⁄2in.) ×104 mm (4 1⁄8in.)
DL: 220 mm (8.7 in.) ×110 mm (4.3 in.)
Thickness Less than 0.52 mm (0.020 in.)
Weight 75 g/m2(20 lb) ∼90 g/m2(24 lb)
Quality Plain paper
Note: Printing of envelopes is supported only at room temperature. When inserting envelopes,
keep the longer side horizontal.
Product Description Stylus Pro Service Manual
1-4 Rev.B

Printable area:
Cut sheets
Note: A: Mnimum top margin = 3 mm (0.12 in.)
B: Minimum left margin = 3 mm (0.12 in.)
C:Minimum right margin is:
A4 size: 3 mm (0.12 in.)
Letter size: 9 mm (0.35 in.)
Legal size: 9 mm (0.35 in.)
Envelopes: 3 mm (0.12 in.)
D:Minimum bottom margin = 14 mm (0.55 in.)
Envelopes
A
(Top margin)
B
(Left margin) C
(Right margin)
D
(Bottom margin)
Printable area
Figure 1-3. Printable Area for Cut Sheets
Top margin
3 mm (0.12 in.)
Left margin
3 mm (0.12 in.) Right margin 3 mm (0.12 in.)
Bottom margin
14 mm (0.55 in.)
Printable area
Figure 1-4. Printable Area for Envelopes
Stylus Pro Service Manual Product Description
Rev.B 1-5

Adjust lever settings: The adjust lever on the carriage unit must be set to the proper position for the
paper thickness, as shown in Table 1-5.
Table 1-5. Adjust Lever Setting
Lever Position Paper Paper Thickness
LEFT
(Vertical) Cut Sheets 0.08 ∼
0.11 mm
(0.003
∼ 0.004 in.)
RIGHT
(Horizontal) Envelopes Less than 0.5 mm (0.020 in.)
1.2.4 Ink Cartridge Specifications
Black
Type: Exclusive cartridge
Color: Black
Print capacity: 1.2 million characters (315 dots/character, Roman 10 cpi)
Life: The effective life from the indicated production date is 2 years.
Storage temperature: –30 ∼40°C (−22 ∼104°F) Storage under a month at 40°C (104°F)
−30 ∼60°C(−22 ∼140°F) Transit under a month at 40°C (104°F)
−30 ∼60°C(−22 ∼140°F) Transit under 120 hours at 60°C (140°F)
Dimension (W ×D×H): 26.9 ×67.4 ×41.8 mm (1.06 ×2.65 ×1.65 in.)
Color
Type: Exclusive cartridge
Color: Cyan, magenta, yellow
Print capacity: 28 sheets/color (A4, full image printing at 360 dpi)
Life: The effective life from the indicated production date is 2 years.
Storage Temperature: –30 ∼40°C (−22 ∼104°F) Storage under a month at 40°C (104°F)
−30 ∼60°C(−22 ∼140°F) Transit under a month at 40°C (104°F)
−30 ∼60°C(−22 ∼140°F) Transit under 120 hours at 60°C (140°F)
Dimension (W ×D×H): 54.0 ×67.4 ×41.8 mm (2.13 ×2.65 ×1.65 in.)
Notes: r Ink cartridge cannot be refilled; it is the only consumable article.
r Do not use an ink cartridge that has exceeded the ink life.
r Ink freezes below − 3 ° C; however, it can be used after it returns to room
temperature.
1.2.5 Electrical Specifications
Table 1-6. Rated Electrical Ranges
Carriage Unit
Envelopes
Cut Sheets
Figure 1-5. Adjustment Lever Settings
Product Description Stylus Pro Service Manual
1-6 Rev.B

Item 120 V Version 220 - 240 V Version
Rated voltage 120 VAC 220 - 240 VAC
Input voltage range 103.5 ∼
132 V 198 ∼ 264 V
Rated frequency range 50 ∼
60 Hz 50 ∼ 60 Hz
Input frequency range 49.5 ∼
60.5 Hz 49.5 ∼ 60.5 Hz
Rated current 0.6 A 0.4 A
Power consumption Approx. 20 W
(self-test with 10-cpi LQ characters) Approx. 20 W (self-test with 10-cpi LQ characters)
Insulation resistance 10 MΩ,
minimum
(applying 500 VDC between
AC line and chassis)
10 MΩ , minimum
(applying 500 VDC between
AC line and chassis)
Dielectric strength 1000 VAC rms - 1 minute or
1200 VAC rms - 1 second
(between AC line and chassis)
1500 VAC rms - 1 minute
(between AC line and chassis)
1.2.6 Environmental Conditions
Table 1-7. Acceptable Environmental Conditions
Description Operating Non Operating
Temperature 10 ∼
35 ° C (50 ∼ 95 ° F)
*1
− 20 ∼ 60 ° C ( − 4 ∼ 122 ° F)
*2
Humidity 20 ∼
80% RH
*1,3
5∼ 85% RH
*2,3
Shock resistance 1G (within 1 msec.) 2G (within 2 msec.)
*2
Vibration resistance 0.15 G 0.50 G
2
*1 : For operating the printer, conditions must be in the range shown in the figure below.
*
2
: These conditions are acceptable when the printer is in its shipping container.
*
3
: Without condensation.
Humidity
(% RH)
˚C
(˚F)
80%
55%
20%
10˚C
(50˚F) 27˚C (80˚F) 35˚C (95˚F)
Guaranteed range
Figure 1-6. Temperature/Humidity Range
Stylus Pro Service Manual Product Description
Rev.B 1-7

1.2.7 Reliability
Total print volume: 75,000 pages (A4, letter)
Printhead life: 1,000 million dots/nozzle
1.2.8 Safety Approvals
Safety standards: 120 V version: UL1950 with D3,
CSA22.2 # 950 with D3
220-240 V version: EN 60950 (TÜV, SEMKO, DEMKO,
NEMKO, SETI)
Radio frequency interference (RFI): 120 V version: FCC part 15 subpart B class B
220-240 V version: Vfg.243 (VDE0878 part 3, part 30)
EN55022 (CISPR PUB. 22) class B
1.2.9 Physical Specifications
Dimension (W ×D×H): 482 ×530 ×192 mm (18.5 ×20.7 ×7.56 in.)
Weight: Approximately 7.5 kg (16.5 lb)
Product Description Stylus Pro Service Manual
1-8 Rev.B

1.3 INTERFACE SPECIFICATIONS
The Stylus Pro is standard-equipped with an 8-bit parallel and serial interface.
1.3.1 Parallel Interface Specifications
Data format: 8-bit parallel
Synchronization: By STROBE pulse synchronization
Handshaking: By BUSY and ACKNLG signals
Signal level: TTL compatible level
Adaptable connector: 36-pin 57-30360 (Amphenol or equivalent)
Data transmission timing: See Figure 1-7.
Note: Transition time (rise time and fall time) of every input signal must be less than 0.2
µ s.
The Busy signal is active (HIGH) under the following conditions:
rDuring data reception (See Figure 1-7.)
rWhen the input buffer is full
rWhen the INIT input signal is active
rDuring initialization
rWhen the ERROR or PE signal is active
rDuring the self-test mode
rDuring the demonstration mode
rDuring the default setting mode
rWhen a fatal error occurs
The ERROR signal is active (LOW) under the following conditions:
rWhen a paper-out error occurs
rWhen a no ink cartridge error occurs
rWhen a fatal error occurs
The PE signal is active (HIGH) under the following conditions:
rWhen a paper-out error occurs
rWhen a fatal error occurs
Approx. 5 µs
Approx. 5 µs
0.5 µs (minimum)
0.5 µs (minimum)
0.5 µs (minimum)
BUSY
ACKNLG
DATA
STROBE
Figure 1-7. Data Transmission Timing
Stylus Pro Service Manual Product Description
Rev.B 1-9

Table 1-8 shows connector pin assignments and signal functions of the 8-bit parallel interface.
Table 1-8. Signal and Connector Pin Assignments for Parallel Interface
Pin No. Signal Name I/O* Description
1STROBE I
The STROBE pulse is used to read data from the host
computer. Pulse width must be 0.5 µs or more. Normally, it
is HIGH, and data is latched with the rising edge of this
signal.
2-9 DATA 1-8 I
DATA 1-8 are parallel data bits. When one of these signals is
HIGH, the data bit is 1; when LOW, the data bit is 0. The most
significant bit (MSB) is DATA 8. The signal state must be
maintained for 0.5 µs on either side of the STROBE signal’s
active edge.
10 ACKNLG O
ACKNLG is an acknowledge pulse with a width of
approximately 10 µs. This signal goes LOW upon
completion of data reception to indicate that the printer is
ready to receive further data.
11 BUSY O The BUSY signal informs the host computer of the printer’s
status. When this signal is HIGH, the printer cannot accept any
more data.
12 PE O This signal indicates whether paper is available in the printer or
not. A HIGH level indicates no paper.
13 SLCT O Pulled up to +5 V through a 1.0 KΩresistor in the printer.
14 AFXT I
If this signal is set to LOW, the printer automatically performs
one line feed upon receipt of a CR (carriage return) code. The
status of this signal is checked only at power on and
initialization.
31 INIT I If this signal goes LOW, the printer is initialized. The pulse
width of this signal must be 50 µs or more.
32 ERROR O This signal goes LOW if the printer has a fatal error or runs out
of paper.
35 +5 V — Pulled up to +5 V through 1.0 KΩresistor in the printer.
17 CHASSIS — Chassis ground.
16 GND — Signal ground.
19-30 —— —
33,36 — — Not used.
15,18,34 —— —
* The I/O column indicates the direction of the signal as viewed from the printer.
Product Description Stylus Pro Service Manual
1-10 Rev.B

1.3.2 Serial Interface Specifications
Data format: RS-422 serial
Synchronization: Asynchronous
Handshaking: By DTR signal and X-ON/X-OFF protocol
Table 1-9. DTR and X-ON/X-OFF Protocol
State Buffer Space DTR X-ON/X-OFF
Busy Less than 512 bytes Off X-OFF
Ready More than 1,024 bytes On X-ON
Word length
Start bits:
Data bits:
Parity bits:
Stop bits:
1 bit
8 bit
none
1 bit
Bit rate: 57.6K / 230.4K bps
Adaptable connector: 8-pin mini-circular connector
Recommended I/F cable: Apple®System peripheral-8 cable
Table 1-10. Signal and Connector Pin Assignments for Serial Interface
Pin No. Signal Name I/O* Description
1DTR Out Data terminal ready
2NC — No connection
3TXD Out Transmit data
4SG In Signal ground
5RXD In Receive data
6TXD Out Balanced transmit
7NC — No connection
8RXD In Balanced receive
* The I/O column indicates the data flow as viewed from the printer.
Stylus Pro Service Manual Product Description
Rev.B 1-11

1.4 OPERATIONS
This section describes the basic operations of the printer.
1.4.1 Control Panel
The control panel for this printer has 1 lock-type and 5 non lock-type pushbuttons, and 15 LED
indicators for easy operation of the various printer functions.
Buttons
Operate Turns the printer on or off.
Alt Modifies the function of other buttons. Holding down this button for
3 seconds turns the Pause light to come on, and causes the printer to
move the carriage to the ink cartridge installation position. Pressing Alt
again causes the carriage to return to the home position.
Font Cycles through the font choices. Pressing the Font button, while holding
down the Alt button in pause mode causes the carriage to move to the
gap adjustment position. Pressing the Alt button again causes the
carriage to return to the home position.
Economy/Condensed Selects either economy printing or condensed printing mode. Pressing
the Economy/Condensed button while holding down the Alt button turns
the Pause light on and starts the color printhead cleaning cycle.
Load/Eject Either loads a new sheet into the printer or ejects paper currently in
the paper path. Pressing the Load/Eject button while holding down the
Alt button starts the black printhead cleaning cycle.
Pause Stops printing temporarily or resumes printing if it has been stopped
temporarily. Pressing Pause while holding down the Alt button for
about three seconds, or until all LEDs light, resets the printer.
Operate Alt
Font
Economy/
Condensed
Load/Eject
Pause
Figure 1-8. Control Panel Appearance
Product Description Stylus Pro Service Manual
1-12 Rev.B