Epson 420i User manual

HIGH S

BUSINESS

PEED

PRINTER

USER’S

GUIDE

EPSON AMERICA INC. SERVICE DIVISION

EPSON

420i

HIGH SPEED BUSINESS PRINTER

Epson America, Inc.

Computer Products Division

2780 Lomita Blvd.

Torrance, CA 90505

(213) 539-9140

WARNING:

“This equipment has been certified to comply with the limits for a Class b

computing device, pursuant to Subpart J of Part 15 of FCC Rules. Only com-

puters certified to comply with the Class B limits may be attached to this printer.

Operation with noncertified computers is likely to result in interference to radio

and TV reception.”

“This equipment generates and uses radio frequency and if not installed and

used properly, that is, in strict accordance with the manufacturer’s instructions,

may cause interference to radio and television reception. It has been tested

and found to comply with the limits for a Class B computing device in accor-

dance with the specifications in Subpart J of Part 15 of FCC Rules, which are

designed to provide reasonable protection against such interference in a

residential installation. However, there is no guarantee that interference will

not occur in a particular installation. If this equipment does cause interference

to radio or television reception, which can be determinded by turning the equip-

ment off and on, the user is encouraged to try to correct the interference by

one or more of the following measures:

• Reorient the receiving antenna.

• Relocate the computer with respect to the receiver.

• Move the computer away from the receiver.

• Plug the computer into a different outlet so that computer and

receiver are on different branch circuits.

If necessary, the user should consult the dealer or an experienced radio/televi-

sion technician for additional suggestions. The user may find the following

booklet prepared by the Federal Communications Commission helpful:

“How to Identify and Resolve Radio-TV Interference Problems.”

This booklet is available from the US. Government Printing Office, Washington,

D.C. 20402, Stock No. 004-000-00345-4.

IBM-PC®is a registered trademark of International Business Machines

Corporation.

INTRODUCTION

The Epson 420i is a high speed business printer which is usable with almost all commer-

cial software, including word processing and graphics programs. By changing one switch

on the back of the printer, either the Epson Printer mode or the IBM Graphics Printer

mode is selectable. The two modes differ in character sets and some printer commands.

In contrast with the IBM Graphics Printer, the Epson 420i prints italic characters. Most

programs written for the IBM Graphics Printer do not attempt to print them.

The IBM Graphics Printer mode is selected when extended characters are to be used,

or when software is limited for use with the IBM Graphics Printer.

Refer to the sections tied ‘DIP Switch Setting” (page 26), “Code Table” (pages 30 through

32) and “Differences between the Epson Printer Mode and the IBM Graphic Printer Mode”

(page 36) for details on use of each mode.

iii

PRECAUTIONS FOR USE

• When using fan fold paper, the friction lever should be positioned to the front.

• Do not apply undue force to the transparent printer cover.

• Do not use a power supply voltage which is out of the specified range.

• Do not touch the printhead immediately after printing because it is too hot.

•

Never close the openings of the upper enclosure or place the printer where these

openings are next to a wall.

• Be careful not to twist the ribbon while installing it.

•

Insert the ribbon between the ribbon guide and the printhead as shown in Figure 3.

•

Wait at least two seconds after turning power off before turning it back on again.

The initialization process may not be performed correctly if this is not done.

•

The printer should be used where the humidity is low, there is little dust, and where

it is not in direct sunlight.

•

Do not perform printing without the ribbon cassette and paper properly installed.

EPSON reserves the right to change the contents as stated herein at any time and

without notice. Although every effort has been made to insure that the contents as

stated herein are complete and without error, EPSON cannot be responsible for any

damage that may occur should this not be the case.

CONTENTS

OUTLINE

...............................................................................

SWITCHES AND LAMPS

...................................................... 4

REPLACEMENT OF THE RIBBON CASSETTE

....................

PAPER SETTING

...................................................................

MAIN FUNCTIONS

................................................................

PARALLEL INTERFACE

........................................................

SERIAL INTERFACE

.............................................................. 22

DIP SWITCH SETTING

.......................................................... 26

CODE TABLE ........................................................................

CONTROL CODE

SUMMARY

............................................... 33

PRINT MODE FLOWCHART

.................................................

CONTROL CODE EXPLANATION

........................................ 38

PROGRAM EXAMPLES

.........................................................

APPENDIX ........................................................................

OUTLINE

PRINTING OPERATION

1. Printing Method

Impact dot matrix

Bidirectional logic seeking printing

2. Printhead

8 Pins

3. Character Fonts

(140 characters in each font)

Standard

Italic

High quality (correspondence)

Italic high quality

Superscript / subscript

Italic superscript

subscript

IBM graphics fonts

4. Graphic Printing

Standard

Double-Density

High-Density

5. Print Mode

Horizontal x Vertical

x 8 (maximum value of n is 816)

x 8 (maximum value of n is 1632)

x 16 (maximum value of n is 1632)

Any one of 17 fonts may be selected from the five available print modes. Each font

may be used exclusively or intermixed within any given line. When a mode change

is indicated, data already input is printed in the mode first selected, the printer skips

a few spaces, changes mdoes, and then receives new data.

Speed of printout (CPS) is slightly different in each mode depending on operational

complexity, e.g., the bold print and double-strike mdoes are created with two passes

of the printhead, thus requiring a slightly greater printout time.

See the “Detailed Summary of Character Fonts” Table on page 2 for print

specifications and CPS for each mode.

Detailed Summary of Character Fonts

Paper Feed Function and Form Width

Pin feed method (form width may vary) 5”-15.5”

Friction feed method

11”

7. Line Feed Pitch

Minimum 1/180”

8. Line Feed Speed

60 lines/second - when 6 lines/inch is selected

75 lines/second - when 7.5 lines/inch is selected

9. Copies

Original plus 4 copies, non-carbon, total thickness 0.3mm or less

10. Ribbon

Cassette style, single color

Other Specifications

1. Power Supply 117VAC

10%, 220-240VAC

10%, 50/60Hz

2. Temperature (during operation)

5°C - 40°C (41°F - 104°F)

3. Humidity (during operation)

20% - 80%

4. External Dimensions

595 mm (width) x 194 mm (height) x 405 mm

(depth)

5. Weight

6. Power Consumption

(23.4 x 7.6 x 15.9 inches)

(The depth is 580mm when the paper rack is

attached.)

27kg (60lb)

Printing 250 watts

Stand-by 5.5 watts

SWITCHES AND LAMPS

1. POWER Switch

The power switch is located at the rear,

right-hand side of the printer.

2. ON-LINE Switch

Pressing this switch selects either ON-LINE (green indicator on) or OFF-LINE (green

indicator off) state. If in the OFF-LINE state, the printer outputs a busy signal. The

print-head returns to the home position when entering the ON-LINE state from the

OFF-LINE state.

3. LF Switch (LINE FEED)

Each time this switch is pressed, a 1/6 inch line feed is performed. If held down,

continuous line feeds are performed. This command is valid only in the OFF-LINE

state.

Note: Refrain from performing continuous line feed for one minute or more. It may

affect the longevity of the line feed motor.

4. FF Switch (FORM FEED)

If the FF switch is pressed in the OFF-LINE state, a one page form feed is performed.

The page length is selected by the FORM dial switch or by code designation.

5. TOF SET Switch (TOP OF FORM)

If the TOF SET switch is pressed in the OFF-LINE state, the existing paper position

becomes the TOP OF FORM. The page length is designated by the FORM dial switch.

The buzzer sounds for 0.1 second after this switch is pressed.

6. FORM Dial Switch

This switch selects the length of the page. If the switch is set to “0”, the page length

designated by an external device code, becomes valid. The page length can be

altered by pressing the TOF SET switch in the OFF-LINE state. A page length of

11 inches is automatically selected when the TOF SET switch is pressed for a dial

setting of “0”.

Dial

Page Length

Dial

Page Length

CODE SET 5

14 INCH

8 INCH 615 INCH

8.5 INCH

16 INCH

11 INCH

17 INCH

12 INCH

22 INCH

7. MODE Dial Switch

Each character font may be selected by this switch.

Dial

Code Selected Character Font

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