Epson Stylus Pro Service 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 productnamesused herein are for identication purposes only andmay 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

WARNING

The precautionary measures itemized below should always be observed when performing repair/ mainte­nance procedures.

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.

Signals a precaution which, if ignored, could result in damage to equipment.

DANGER

1. ALWAYS DISCONNECT THE PRODUCT FROM BOTH THE POWER SOURCE AND PERI­PHERAL 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 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 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 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.

-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

Stylus Pro Service Manual Product Description

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

2

r Built-in auto sheet feeder Holds 100 cut sheets (55 g/m

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

Rev.B 1-1

Product Description Stylus Pro Service Manual

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

Row CRow D

#1

#2

#3

#16

#1

#2

#3

#16

MagentaCyanYellow

#1

1/360"

1/90"

#2

#3

#16

#3

#7

#63

Figure 1-2. Nozzle Configuration

Printing direction: Bidirectional with logic-seeking
The table below shows print speed and printable columns.

Table 1-1. Print Speed and Printable Columns

#2

#6

#62

Row B

#4

#8

#64

Row A

#1

1/90"

#5

#61

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

1-2 Rev.B

Stylus Pro Service Manual Product Description

Character sets: Legal and 21 international character sets.
Character tables: See Table 1-2.

Table 1-2. Character Tables

Bitmap Fonts Scalable Fonts

EPSON Roman

Character Tables

Italic table mmm
PC437

(U.S./Standard Europe)
PC850 (Multilingual) mmm
PC860 (Portuguese) mmm
PC861 (Iceland) mmm
PC863 (Canadian-French) mmm
PC865 (Nordic) mmm
Abicomp
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 ×

EPSON Sans Serif

EPSON Courier

EPSON Prestige

EPSON Script

Not supported

EPSON Roman

EPSON Sans Serif

mmm

mmm

EPSON Roman T

EPSON Sans Serif H

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

Rev.B 1-3

Product Description Stylus Pro Service Manual

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 in1⁄

-inch minimum increments.

360

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

Legal: 216 mm (8.5 in.) × 356 mm (14.0 in.)
Letter: 216 mm (8.5 in.) × 279 mm (11.0 in.)

Size (W × L)

Thickness 0.08 mm (0.003 in.) ∼ 0.11 mm (0.004 in.)
Weight 55 g/m

Quality

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.

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.)

2

(17 lb) ∼ 90 g/m2(24 lb)
Plain paper, special coated paper for 720 dpi, special coated paper for
360 dpi, transparency film, high-quality glossy paper

Table 1-4. Envelope Specifications

C5: 229 mm (9 in.) × 162 mm (6.4 in.)

Size (W × L)

No. 10: 240 mm (9
DL: 220 mm (8.7 in.) × 110 mm (4.3 in.)

Thickness Less than 0.52 mm (0.020 in.)
Weight 75 g/m

2

(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.

1

⁄2in.) × 104 mm (41⁄8in.)

1-4 Rev.B

Top mar gin
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

Stylus Pro Service Manual Product Description

Printable area:
Cut sheets

B
(Left margin)

C
(Right margin)

Printable area

A
(Top margin)

D
(Bottom margin)

Figure 1-3. Printable Area for 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

Figure 1-4. Printable Area for Envelopes

Rev.B 1-5

Product Description Stylus Pro Service Manual

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
LEFT

(Vertical)
RIGHT

(Horizontal)

1.2.4 Ink Cartridge Specifications

Paper Paper Thickness

Cut Sheets

Envelopes Less than 0.5 mm (0.020 in.)

Cut Sheets

Carriage Unit

Figure 1-5. Adjustment Lever Settings

Black

0.08 ∼

(0.003

0.11 mm

∼

0.004 in.)

Envelopes

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:

Dimension (W × D × H): 26.9 × 67.4 × 41.8 mm (1.06 × 2.65 × 1.65 in.)

–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)

Color

Type: Exclusive cartridge
Color: Cyan, magenta, yellow
Print capacity:
Life: The effective life from the indicated production date is 2 years.
Storage Temperature:

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.

28 sheets/color (A4, full image printing at 360 dpi)

–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)

1.2.5 Electrical Specifications
Table 1-6. Rated Electrical Ranges

1-6 Rev.B

Humidity
(% RH)

˚C
(˚F)

80%

55%

20%

10˚C
(50˚F)

27˚C
(80˚F)

35˚C
(95˚F)

Guaranteed range

Stylus Pro Service Manual Product Description

Item
Rated voltage

Input voltage range
Rated frequency range
Input frequency range
Rated current

Power consumption

Insulation resistance

120 VAC 220 - 240 VAC

103.5 ∼
50 ∼

49.5 ∼

0.6 A 0.4 A
Approx. 20 W

(self-test with 10-cpi LQ characters)
10 MΩ,

(applying 500 VDC between

120 V Version 220 - 240 V Version

132 V

60 Hz

60.5 Hz

minimum

AC line and chassis)

1000 VAC rms - 1 minute or

Dielectric strength

1200 VAC rms - 1 second
(between AC line and chassis)

1.2.6 Environmental Conditions
Table 1-7. Acceptable Environmental Conditions

Description
Temperature

Humidity
Shock resistance
Vibration resistance

10 ∼

35°C (50∼95°F)

20 ∼

80% RH

1G (within 1 msec.) 2G (within 2 msec.)

0.15 G 0.50 G

198 ∼

264 V

50 ∼

60 Hz

49.5 ∼

60.5 Hz

Approx. 20 W

(self-test with 10-cpi LQ characters)

10 MΩ

, minimum

(applying 500 VDC between

AC line and chassis)

1500 VAC rms - 1 minute

(between AC line and chassis)

Operating Non Operating

*1

*1,3

−20∼60°
5 ∼

C (−4∼122°F)

85% RH

*2,3

2

*2

*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.

*

Figure 1-6. Temperature/Humidity Range

Rev.B 1-7

Product Description Stylus Pro Service Manual

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: 120V 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)

1-8 Rev.B

Approx. 5 µs
Approx. 5 µs

0.5 µs (minimum)

0.5 µs (minimum)

0.5 µs (minimum)

BUSY

ACKNLG

DATA

STROBE

Stylus Pro Service Manual Product Description

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
Handshaking: By BUSY and

STROBE pulse synchronization

ACKNLG signals

Signal level: TTL compatible level
Adaptable connector: 36-pin 57-30360 (Amphenol or equivalent)
Data transmission timing: See Figure 1-7.

Figure 1-7. Data Transmission Timing

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:

r During data reception (See Figure 1-7.)
r When the input buffer is full
r When the

INIT input signal is active
r During initialization
r When the

ERROR or PE signal is active
r During the self-test mode
r During the demonstration mode
r During the default setting mode
r When a fatal error occurs

The

ERROR signal is active (LOW) under the following conditions:

r When a paper-out error occurs
r When a no ink cartridge error occurs
r When a fatal error occurs

The PE signal is active (HIGH) under the following conditions:

r When a paper-out error occurs
r When a fatal error occurs

Rev.B 1-9

Product Description Stylus Pro Service Manual

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.

1

2-9

10

11

12
13

14

31

32
35

17
16
19-30
33,36
15,18,34

Signal Name I/O* Description

The

STROBE pulse is used to read data from the host

STROBE I

DATA 1-8 I

ACKNLG O

BUSY O

PE O

SLCT O Pulled up to +5 V through a 1.0 KΩ resistor in the printer.

AFXT I

INIT I

ERROR O

+5 V — Pulled up to +5 V through 1.0 KΩ resistor in the printer.

CHASSIS — Chassis ground.

GND — Signal ground.

—— —
— — Not used.
—— —

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.

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

active edge.

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.

The BUSY signal informs the host computer of the printer’s

status. When this signal is HIGH, the printer cannot accept any

more data.

This signal indicates whether paper is available in the printer or

not. A HIGH level indicates no paper.

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.

If this signal goes LOW, the printer is initialized. The pulse

width of this signal must be 50 µs or more.

This signal goes LOW if the printer has a fatal error or runs out

of paper.

STROBE signal’s

* The I/O column indicates the direction of the signal as viewed from the printer.

1-10 Rev.B

Stylus Pro Service Manual Product Description

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
Busy

Ready

Word length

Start bits:
Data bits:
Parity bits:

Stop bits:
Bit rate: 57.6K / 230.4K bps
Adaptable connector: 8-pin mini-circular connector
Recommended I/F cable: Apple

Buffer Space DTR X-ON/X-OFF

Less than 512 bytes Off X-OFF
More than 1,024 bytes On X-ON

1 bit
8 bit
none
1 bit

®

System peripheral-8 cable

Table 1-10. Signal and Connector Pin Assignments for Serial Interface

Pin No.
1

2
3
4
5
6
7
8

Signal Name I/O* Description

DTR Out Data terminal ready

NC — No connection

TXD Out Transmit data

SG In Signal ground
RXD In Receive data
TXD Out Balanced transmit

NC — No connection
RXD In Balanced receive

* The I/O column indicates the data flow as viewed from the printer.

Rev.B 1-11

Product Description Stylus Pro Service Manual

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.

Operate Alt

Font

Economy/
Condensed

Load/Eject

Pause

Figure 1-8. Control Panel Appearance

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.

1-12 Rev.B

Stylus Pro Service Manual Product Description

Indicators

Operate On when the printer is on. Blinks during power on and off.
Data On when print data is in the input buffer. Data and Pause lights blink if

an error occurs.
Paper Out On when the printer is out of paper. Blinks when a paper jam occurs.
No Ink Cartridge Onwhen the ink is out.
Economy Onwhen economy printing mode is selected.
Condensed On when condensed printing mode is selected.
Font These LEDs indicate the selected font.
Pause On when printing is paused.

1.4.2 Panel Operation at Power On

You can activate the modes below by doing the following:
Self-test mode Turn on the printer while holding down the Load/Eject button.

Hex dump mode Turn on the printer while holding down the Font and Load/Eject

buttons. Once this mode is selected, the printer prints all received data

in hexadecimal format.
Default setting mode Turn on the printer while holding down the Economy/ Condensed

button. For more information about the mode, see Section 1.4.3.
Initialize EEPROM Turn on the printer while holding the Alt, Font, Load/Eject, and Pause

buttons.

Rev.B 1-13

Product Description Stylus Pro Service Manual

1.4.3 Default Settings

The printer can save some printer setting parameters that define its functions at initialization. You can
change these parameters using the printer’s default-setting mode.

1.4.3.1 Default Setting Items

In default-setting mode, you can change settings listed in the table below. Activate default-setting mode
by holding down the Economy/Condensed button while turning on the printer.

Table 1-11. Default Setting Items

Menu
Contents

Character table

Print direction

Network I/F mode

Auto line feed
Loading position

Interface mode

Auto I/F wait mode

Table 1-12. Characteristics of Print Direction Mode

Item

Auto

Bi-D

Uni-D

Black and White Printing Color (CMYK) Printing

Throughput and quality is

Print quality may be down.

Selects the character table —
Controls the print direction. (See Tables 1-12 and 1-13)

Auto
Bi-D
Uni-D

Off: For normal environments.
On: For network environments.

On: Valid
Off: Invalid

3.0/8.5 mm (0.12/0.33 in.) 3.0 mm
Auto I/F mode

Parallel I/F mode
Serial I/F mode
Optional I/F mode

10/30 seconds 10 sec.

better.

Throughput is best.

Throughput is worse.
Print quality is better.

Description

Throughput is better.
Color quality with special paper is worse.
(Color correction depends on the printing direction.)

Throughput is better.
Color quality with special paper is worse.
(Color correction depends on the printing direction.)

Throughput is worse.
Color quality is best.

Factory

Setting

—

Off

—

—

Table 1-13. Printing Direction and ESC U Command

Default Setting
Mode

^
Character mode

(for MS-DOS
Raster graphics
mode (for
Windows

®

™

)

)

ESC U0 ESC U1 None ESC U0 ESC U1 None ESC U0 ESC U1 None

Auto Auto Auto Bi-D Uni-D Bi-D Uni-D Uni-D Uni-D

Bi-D Uni-D Auto Bi-D Uni-D Bi-D Bi-D Uni-D Uni-D

Note: Printing direction is controlled by driver in Windows environment.

1.4.3.2 Changing the Default Settings

To change the printer’s default settings:

1-14 Rev.B

Auto Bi-D Uni-D +

Stylus Pro Service Manual Product Description

a. Hold down the Economy/Condensed button and turn on the printer. The printer prints a sheet that

shows the firmware version and describes how to select the language used to print messages.

b. Press the Font button until the appropriate font LED is selected. The following table shows which

language corresponds to which font LED.

Table 1-14. Language Selection

Language
English

Français
Deutsch
Italiana
Español

c. Press the Alt button. The printer prints the current settings using the selected language. It also

prints a table showing how to change the printer settings.

d. Press the Font button to advance through the setting menu. The current printer settings are

indicated by the Courier, Roman T (PS), and San Serif H (PS) LEDs. Each time you press the Font
button, you adance to the next setting, and the three font LEDs change according to the selection.

Font LED

Courier
Roman T (PS)
Sans Serif H (PS)
Roman
Sans Serif

Table 1-15. Feature Selection

Menu

Feature/Menu

Character table On On On See Table 1-16 +
Print direction

Network I/F mode
Auto line feed
Loading position
Interface mode

Auto I/F wait time

e. Change the setting value by pressing Alt button. Pressing the Alt button changes the setting for the

current menu. The status of the LEDs will be changed as the button is pressed.

Courier

LED

On Off Off

Off On Off
On On Off
Off Off On

On Off On

Off On On

Roman T
(PS) LED

Sans

Serif H

(PS) LED

Setting

Auto On Off Off

Bi-D Off On Off

Uni-D On On Off

Off Off Off Off
On On Off Off
Off Off Off Off
On On Off Off

3 mm Off Off Off

8.5 mm On Off Off
Auto On Off Off

Parallel Off On Off

Serial On On Off

Option Off Off On
10 sec. Off Off Off
30 sec. On Off Off

Setting Value

Operate

LED

Data
LED

Paper Out

LED

Rev.B 1-15

Product Description Stylus Pro Service Manual

Table 1-16. Character Table Selection

Version Settings Operate LED Data LED

Italic U.S.A. Off Off Off
Italic France On Off Off
Italic Germany Blinks Off Off
Italic U.K. Off On Off

Common

Standard

NLSP

f. Repeat d and e to change other printer settings. The setting menu selection will return to the first menu

after the last menu selection is over.

g. Turn off the printer. The setting is stored into non-volatile memory.

Italic Denmark 1 On On Off
Italic Sweden Blinks On Off
Italic Italy Off Blinks Off
Italic Spain 1 On Blinks Off
PC437 Blinks Blinks Off
PC850 Off Off On
PC860 On Off On
PC863 Blinks Off On
PC865 Off On On
PC861 On On On
BRASCII Blinks On On
Abicomp Off Blinks On
PC437 Greek Off Off On
PC853 Blinks Off On
PC855 Off On On
PC852 On On On
PC857 Blinks On On
PC866 Off Blinks On
PC869 On Blinks On
MAZOWIA Blinks Blinks On
Code MJK Off Off Blinks
ISO 8859-7 On Off Blinks
ISO Latin 1T Blinks Off Blinks
Bulgaria Off On Blinks

Paper Out

LED

1-16 Rev.B

Stylus Pro Service Manual Product Description

1.4.4 Error Conditions

The printer can detect the various errors and indicate them with LEDs.

Table 1-17. Error Indications

Error Data LED

Paper out Off On Off Off Off Off
No ink cartridge Off Off On Off Off Off
Paper jam Off Blinks Off Off Off Off
Maintenance request Blinks Blinks Blinks Blinks Blinks Blinks
Carriage error Blinks Off Off Off Off Blinks

Paper Out

LED

No Ink

Cartridge

LED

Economy

LED

Condensed

LED

Pause

LED

1.4.5 Printer Initialization

There are three initialization methods: hardware initialization, software initialization, and panel initialization.

1.4.5.1 Hardware Initialization

Hardware initialization is performed by:
r Turning on the printer.
r Sending the parallel interface

(If the

INIT signal is active when the printer is turned on, hardware initialization is started when the INIT

signal becomes inactive.)
When the hardware initialization is performed:

r The printer mechanism is initialized.
r Input data buffer is cleared.
r Downloaded character definitions are cleared.
r Print buffer is cleared.
r Default values are set.

INIT signal.

1.4.5.2 Software Initialization

Software initialization is performed upon receipt of the control code ESC @.
When the software initialization is performed:

r Print buffer is cleared.
r Default values are set.

The last panel settings are kept.

1.4.5.3 Panel Initialization

This printer is initialized by pressing the Load/Eject button while pressing the Alt button.
When the panel initialization is performed:

r Input data buffer is cleared.
r Print buffer is cleared.
r Default values are set.

The last panel settings are kept.

Rev.B 1-17

Product Description Stylus Pro Service Manual

1.5 MAIN COMPONENTS

The main components of the Stylus Pro are:

o Main control board (C164 MAIN Board)
o Power supply unit (C137 PSB/PSE Board)
o Control panel board (C137 PNL Board)
o Printer mechanism (M-4A10)
o Housing

1.5.1 Main Control Board (C164 MAIN Board)

The main control board (C164 MAIN Board) consists of an H8/3003 16-bit CPU, E05A09 gate array, a
program ROM (1/2/4Mb), a program/CG ROM (1/2/4/8Mb), 1 DRAM (4Mb), a mask ROM (4/8Mb), an
EEPROM (1Kb), and a lithium battery for powering the protect counters. The reset IC (M51955 and PST 592)
is equipped with both a logic system and a power system. The C164 MAIN Board is almost the same as the
C162 MAIN Board, except that the C164 board has no solenoid driving circuit for the ADF. (The C162
MAIN Board has a solenoid driver to operate the document feeder. )

Table 1-18. Comparison between C164 MAIN and C162 MAIN

Main Board C164 MAIN Board C162 MAIN Board

DRAMs 1 2
ADF Plunger

Driving Circuit *

None Equipped

* The ADF plunger switches the PF motor operation from paper feed to paper pickup.

CPU (H8/3003)

RAM

Program ROM

Head Common Drive Tansistors

Lithium Battery

164

Gate Array (E05B09)

EEPROM

PF Motor Driver IC

CR Motor Driver IC

CG ROM

Figure 1-9. C164 MAIN Board Component Layout

1-18 Rev.B

L1

C1

R2

CN1

CN2

F1

IC51 (TL494)

T1

Q1

C11

C51

C82

PC1

C3

Q51

DB1

D51

SW6

LED1
/
LED4

LED8
/
LED14

LED5
LED6

LED7

SW4
/
SW0

Stylus Pro Service Manual Product Description

1.5.2 Power Supply Board (C137 PSB/PSE Board)

The power supply board (C137 PSB/PSE Board) consists of an RCC switching regulator circuit. This board is
equipped with a power switch, connected to the secondary circuit. Thus, if the printer is turned off, it can
continue to operate to eject the paper and perform the head-capping operation. The power on/off signal is
always monitored by the E05A09 gate array on the C164 MAIN Board, and the logic system recognizes the
power switch status.

Figure 1-10. C137 PSB/PSE Component Layout

1.5.3 Control Panel (C137 PNL Board)

The 15 LEDs on this board indicate error status (there is no buzzer system). By using the 6 buttons in
combination with one another, you can operate the printer in each protected mode (cleaning color or black ink
systems, exchanging ink cartridges, running a self-test, setting default values, resetting the printer, and
EEPROM clearing).

Figure 1-11. C137 PNL Board Component Layout

Rev.B 1-19

Product Description Stylus Pro Service Manual

1.5.4 Printer Mechanism (M-4A11)

The M-4A11 printer mechanism is equipped with a 64-nozzle black printhead and 48-nozzle color (CMY)
printhead on the carriage unit. A resolution of 720 dpi is possible with special (non-absorbent) paper.

The ink system has both a black pump unit and a color pump unit. Waste ink from each printhead flows into
individual caps. Power for the pump system and paper feed system is supplied by the paper feed motor. This
printer mechanism is based on Stylus Color’s (M-4A10).

1.5.5 Housing

The Stylus Pro’s housing consists of the printer cover, upper case, and the lower case.
Attached to the housing is the front paper tray, with paper separator.

1-20 Rev.B

Chapter 2 Operating Principles

Table of Contents

2.1 OVERVIEW 2-1

2.2 OPERATING PRINCIPLES OF THE PRINTER MECHANISM 2-1

2.2.1 Printer Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

2.2.2 Principles of the Printing Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

2.2.3 Carriage Drive Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

2.2.3.1 Platen Gap Adjust Lever . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

2.2.4 Paper Feed Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

2.2.5 Ink System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7

2.2.6 Pump Mechanism. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11

2.2.7 Cap Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11

2.2.8 Wiping Mechanism. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12

2.3 OPERATING PRINCIPLES OF THE ELECTRICAL CIRCUITS 2-13

2.3.1 Operating Principles of the Power Supply Circuit . . . . . . . . . . . . . . . 2-13

2.3.2 Operating Principles of the Main Control Circuit . . . . . . . . . . . . . . . . 2-14

2.3.2.1 Reset Circuits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15

2.3.2.2 Sensor Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15

2.3.2.3 Carriage Motor Drive Circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16

2.3.2.4 Paper Feed Motor Drive Circuit . . . . . . . . . . . . . . . . . . . . . . . . 2-18

2.3.2.5 Printhead Drive Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-19

2.3.2.6 DMA Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-20

2.3.2.7 DRAM Refresh Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-21

2.4 INK SYSTEM MANAGEMENT 2-21

2.4.1 Ink Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-21

2.4.2 Counter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-23

2.4.2.1 Protect Counter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-23

List of Figures

Figure 2-1. Printer Mechanism Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Figure 2-2. Structure of Printhead. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Figure 2-3. Principles of the Printing Operation . . . . . . . . . . . . . . . . . . . . . . 2-3

Figure 2-4. Platen Gap Lever Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

Figure 2-5. Platen Gap Lever Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

Figure 2-6. Paper Feed Mechanism. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

Figure 2-7. Ink System Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7

Figure 2-8. Pump Mechanism Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8

Figure 2-9. Switch Lever Set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8

Figure 2-10. Paper Feed Mechanism. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9

Figure 2-11. Switch Lever Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9

Figure 2-12. Pump Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10

Figure 2-13. Cap Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11

Figure 2-14. Wiping Mechanism. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11

Figure 2-15. Block Diagram of the Electrical Circuits . . . . . . . . . . . . . . . . . 2-12

Figure 2-16. Power Supply Circuit Block Diagram. . . . . . . . . . . . . . . . . . . . 2-13

Figure 2-17. Main Control Circuit Block Diagram . . . . . . . . . . . . . . . . . . . . 2-14

Figure 2-18. Reset Circuit Block Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15

Figure 2-19. Sensor Circuit Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . 2-15

Figure 2-20. Carriage Motor Circuit Block Diagram. . . . . . . . . . . . . . . . . . . 2-16

Figure 2-21. Serial Data Transfer Procedure . . . . . . . . . . . . . . . . . . . . . . . . 2-17

Figure 2-22. Paper Feed Motor Drive Circuit Diagram. . . . . . . . . . . . . . . . . 2-18

Figure 2-23. Normal/EPSON Micro Dot Switching Block Diagram. . . . . . . 2-19

Figure 2-24. Trapezoidal Drive Waveform. . . . . . . . . . . . . . . . . . . . . . . . . . . 2-19

Figure 2-25. Printhead Drive Circuit Block Diagram . . . . . . . . . . . . . . . . . . 2-20

Figure 2-26. DMA Controller Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-20

Figure 2-27. Junction Method (CPU-DRAM) . . . . . . . . . . . . . . . . . . . . . . . . . 2-21

List of Tables

Table 2-1. Carriage Drive Motor Specifications . . . . . . . . . . . . . . . . . . . . . . . 2-4

Table 2-2. Drive Terms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

Table 2-3. Platen Gap Adjust Lever Position. . . . . . . . . . . . . . . . . . . . . . . . . 2-5

Table 2-4. Paper Feed Drive Motor Specification . . . . . . . . . . . . . . . . . . . . . 2-5

Table 2-5. Drive Terms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

Table 2-6. Pump Mechanism Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10

Table 2-7. DC Voltage Distribution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12

Table 2-8. Serial Data Contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16

Table 2-9. Paper Feed Motor Drive Modes. . . . . . . . . . . . . . . . . . . . . . . . . . 2-18