Epson LQ-2550 Product Information Guide

LQ-2550 GRAY DOT-MATRIX PRINTER

Ribbon

cartridge

Power cable

Printer Specifications

Printing

Print method:
Print speed:

Ouality
malt

LO

24-pin impact dot matrix
See table below.

CPI

10

12 AW

10
12

Paper guide

Platen knob

Characterslsecondlline

333

111
133

Paper feed methods:

Paper width:

Paper length:

Paper thickness:

Printable area:

Sing.ie

8.5 mm

3mm

sheet

(0.33’)

or more

Friction-

Built-in push feed tractor
Pull tractor (optional)
Double-bin cut sheet feeder (optional)

Single

sheets

7.15 to 14.3 inches

(182

to 364 mm)

Continuous

4.0 to 16.0 inches (101 to 406 mm)

Envelope

No. 6 (166 x 92 mm),
No. 10 (240 x 104 mm)

label

2-l/2

X

15i16

4 X
4 X

15116
l-7116

inches,

inches,

inches,

Single sheets

3.7 to 14.3 inches

Single

sheets

0.0026 to

OX04

(94

to 364 mm)

inches (0.065 to 0.1 mm)

Continuous

0.0023 to 0.018 inches (0.06 to 0.46 mm)

Envelope

01X163

to 0.0197 inches (0.16 to 0.52 mm)

Label

0.0075 inches (maximum 0.19 mm)

Continuous paper

.3

mm f0.12’J

or more

I

I

Printing direction:

tine spacing:

Paper feed speed:
Printable columns:

Character

exe

IOCPI
lOcp! condensed
12CPI

12

CPI

condensed

Buffer:

Character fonts:

1 EpsmF3wnom 1 lalzlr~

‘orrcr-s

~opaaurWilhSl*MllnKomMOdU~

10

Bidirectional logic-seeking for text and
graphics. Unidirectional available through

SeiecType

or software command.

l/6*, l/B’. or programmable in increments of
1/60th,

l/lBOth

or

11360th

of an inch

83 msiiine at

.

See

table below.

l/6’

line spacing

! Maxcmum

I

!
1

printed characters

136

233

163

272

8 Kbyte

--­Characters:

96 standard ASCII character set
(including italic characters)
13 international character sets
Epson Extended Graphics characters

I

I

IOZ

to hlmm

I3

mm
406 mm
26 mm

fO.51’J

(16.0’)

(1.02’)

f4.0

to

15.&J

or

more

paper width

or more

paper

width

‘For printable area for envelopes, see page A-8.
Number of copies:

Continuous. multi-part. no carbon: one
original plus up to five copies. Total thickness
must not exceed 0.018’ (0.46 mm)

-

Ribbon:

Black ribbon cartridge

17762:

Life expectancy (in Letter Quality
characters, at 48 dots/character): 3 million

Color ribbon cartridge

87763:

Life expectancy (in Letter Quality
characters, at Q8 dots/character)

Black: 1.0 million
cyan:
Magenta:
Yellow

0.7 million

0.7 million

0.5 million

Film ribbon cartridge # 7764:

Life expectancy (at 10 cpi, with bi­directional printing, using 136 columns):

0.1 million’

l This number may vary depending on

print direction, characters per inch, or
text density per page.

24-Pin Printers

9/22/89

LQ-2550-1

LQ-2550 GRAY DOT-MATRIX PRINTER

MCBF:

MTBF:

Print head life:
Dimensions and weight:

Voltage:

Power consumption:
Frequency:

Insulation resistance:

Dlelectri~

Temperaturez

Humi+:

Shock:

Vibration:

strength (between AC line and chassis):

For

all

components excluding print head:

5

million lines
6000 power-on hours (at

200

million strokes per wire

Height:
Width:
Depth: 20.4’
Weight: approx. 44

120 VAC + 10%

400

49.5 to 60.5 Hz

ZOM

Can withstand 1.25 kV rms applied for one

minute
Operation: 40°F to 95°F

Storage: -22°F to 140°F (-30°C to
Operation: 10% to 80% (without

condensation)
Storage: 5% to 85% (without condensation)

Operation: Up to 1 G withii 1 ms
Storage: Up to 2 G within 1

Operation: Up to
Storage: Up to 0.50 G at up to 55 Hz

7.7’

26.6’

watts maximum

ohms between AC power line and chassis

25%

Ibs

(5°C

0.25

G at up to 55 Hz

duty)

to 35°C)

60DC)

ms

Reliability

MCBF

(Mean Cycle Between Failure):

Tempera-

Humidity:

Single

binlandbin2

Width

Length

7.17’ LO 14.3’

(182mm

8.27’ to 14.3’

cmmm

Thickness

Weight:
Printable

area :

0.0028’ to 0.0039’

007mm

17 to 22 lb. paper

Operation:

storage:

Operation:

Storage:

sheet

to

to 364mm)

to

364mm)

O.lmm)

a-...=..

100.000 cycles

f41”F (+5”C)

( +3s0cj

-22°F

(+7o”c)
15%

to
condensation
5% to 90% without
condensation

.

(-30°C)

80%

6.50’ to 9.49’

(166mm

3.62’ to

(92mm

0.0043’ to 0.0205’

(0.16mm
12

to 24 lb. paper

to

to

without

envelope

bin1

to 24lmm)

4.09’

to

104mm)

to

I,

+95OF

+15BaF

0.52mm)

The Cut Sheet Feeder

26,7’(W)

Dimensions and

Bin capacity:

’

Envelopes can only be used in bin

Stacker capacity:
Face down

Face up

weight:

X
(mounted on the printer)
approx. 13.2 Ibs.

bin

1

Single sheets. Up to

Envelopes’: Up to 25 (plain and bond type)

bin 2

Single

sheets: Up to

(Total thickness should not exceed 0.59’ or

15mm)

Single sheets:

Envelopes:

Single sheets:

Envelopes:

I

I

22.9’(D) x

1.

16.5’(H)

150

Up to
(Total thickness should not
exceed 0.59’ or

Up to 30 (air mail)

Up to 185 sheets of 17 lb. paper

sheets of 22 lb. paper

185

sheets of 17 lb. paper

15mm)

150

sheets of 22 lb. paper

Up to 60 sheets of 22 lb.

paper

Up to 75 sheets of 17 lb.

paper

Up to 10 (plain and bond

type)

Up to 12 (air mail)

Up

to

150

sheets of 22 lb.

paper
Up

to 185 sheets of 17 lb.

paper

Up to 25 (plain and bond

type)
Up

to 30 (air

mail)

The following is a typical example of a software setup required for
proper operation of your cut sheet feeder. Not
same. so you may find that a bit of experimentation is required before
you find the best equivalent settings to use.

To maintain 54 printed lines per page make the following changes:

Continuous

form settings

Page

Length

Top Margin
Bottom Margin

ail

software is set up the

66

6
6

Cut sheet

feeder settings

61

4

3

22mm

(0

87’)

or

m*re

LQ-2550-2

9/22/89

24-Pin Printers

LQ-2550 GRAY DOT-MATRIX PRINTER

1

Interface Specifications

1

Your printer is equipped with both a parallel and a serial interface. For
specifications for optional interfaces, see the manuals provided with the
optional interfaces.

Parallel interface

The following tables describe the parallel interface.

f’ii

assignments for the

Conmctor

pin assignments and a description of their respective interface

paralleI

interface

signals are shown in the following table.

kann

SlgM

Pin

An

1

19

:

z:

4

2
2

7

2
:

SF

10

26

11

29

I

l All interface conditions are based on

STROBE

DATA
DATA 2

E ,”

DATA 5

k%;

DATA

?i7TRlm

BUSY

I

Snld

1

6

kc-

lrn

lN

STROBE pulse to read dala rn Pulse

wdth

must be more than 0 5

mrcroseconds

IN

These

IN

the 1st 10 8th bits of parallel data.

IN

respectrvely

IN

when

IN

Iog~alCI.

IN

IL!

OUT

About

a 1
Indicates that
and

lhal

more data

OUT A HIGH

cannot

HIGH I”

1) Dunng

2)

Dunng prrntmg

31

When

I

14) Durrng prrnler-error

Tn.

OwrriutlMl

at

Ihe recewrng termrnal

srgnals

represent

Each

dala IS logrcal

recerve

srgnal

1 and LOW when

l~mrrosecond

data

has been

the

prtnter

IS ready lo accept

srgnal lndrcales

data The

the lollowng cases:

data entry

off lrne

level. Both the rise and the

lnformatton

IS at HIGH level

puke.

LOW

recetved

that

Ihe punter

srgnal

goes

(ea

char.

trme)

state.

of

fall times of each signal must be less than 0.2 microseconds.

l Data transfer must be carried out by observing the ACKNLG or

BUSY signal. Data transfer to this printer can be carried out only
after receipt of the

Am

signal or when the level of the BUSY

signal is LOW.

Printing enabled/disabled signals and control conditions
The following table shows the relationship between printing being

enabled or disabled. the on line/off line status, and the receipt of the data
on/off control characters,

DC1

or

pW.

ACKNLG Printing

%Ky

by

when

I

/

I

Default Settings

The following table shows the

the printer is

initialired.

Item
Tap

of

form pasSlcn

Len

and

right margtns

line spacing

Mbcal

tab

Horrzontal

VFU

Font

Userdehned characlers

posrtions

tab

chanti

selectton

pasllions

default conditions that become valid

Reset lo:

Current paper

SeIecTyve seItw

l/&inch line spacing

cleared

Every eight characters

Channel

Reset to

Hardware: Cleared
Software: Deselected only

0

the

cosdion

current

SelecTwe setting

In addition, the data b&r is cleared when the printer is

initial&d

tumingonthepowerorbysendinganINITsignal.

Note: The userdefined character set is not cleared when the
printer is initialized by ESC

@.

I

Choosing from a menu

II

IS

Because the family of Epson printers shares many
use an application program even if it does not

printer selection menu. If the

LQ-2550 is not listed, select the first printer

lit

the

commar&

LQ-2550

you can

on its

available on the following list:

LQ-1050

(LQ-SSO)

LQ-loo0

CLQ-KO,

W-500

LQ-1500
lf none of these printers is listed, select the first one available on the

following list:

LQ

EX
FX

LX

RX
MX
Epson printer
Standard printer
Draft printer

If you are printing in color, it is recommended that you choose LQ-2550
or LQ-2500.

To use all the features of the LQ-2550, however, it is best to use a

program with the LQ-2550 on its menu. If your program does not list
this printer, contact the software manufacturer to see if an update is
available. For further information on using software, see Chapter 4.

‘While printing is disabled, character data is being received and

acknowledged so that the printer can look for another

DC1

character.

which would allow it to resume printing.

Compatible interfaces

The following is a list of Epson interfaces that are compatible with your
LQ printer.

Inlet-face number

#El43
x8148

X8165

Name
New

sew mteriace

lntelllgenr

Inle%gent

send

rnreriace

IEEE-488 Interface

24-Pin Printers

WARNING: When you print on envelopes, be sure that your
application program settings keep the printing entirely within

the printable area shown below.

22mm
(0.87-J

or

more

Note: If the printed results are faint, use the PLATEN GAP ADJUST
button to adjust the distance between the print head and the platen.

I

LQ-2550-3

I

LQ-2550 GRAY DOT-MATRIX PRINTER

PITCH

r-l

[

Roman

10

CPI]

Some of the fonts do not offer all pitches. See the table below.

I

Dran

I

10 13 15

I

International character sets

country

V.S.6

FRPlNCE
GERMW+Y
U.K.

DENMAR

K I

23 24 40

ASCII code (hex)

58

5C 5D5E60787C

7D 7E

In&id-id

graphics option commands

There are four individual graphics option commands that are very much
the same as the
graphics option. AII these commands are for B-pin
Note that the commands contain one less variable than the ESC

ESC

l command, but each one works for only one

graphia

options.

*

command because they don’t need to select a graphics option.

The commands are shown below:

-.., .,

Singledenslty

nn,hb~.n.,t”

----.- -“,.“,.,

CRT

Ill

Tnple.densny

Hexdenslty’

* AdlaCenI dots

cannot be

printed I” lhls mcde

I

-,

1

24 [32

I

-34

I 11

--

24
24
24

-

I

60

1

,m

I

-I

38
39
40

,S”

90

1

180

!

360

1

DENPIARK

II

SPAIN II
LATIN mERIC*

I(ORE&

LEGAL

To select the
COUNTRY option by following the steps in the CHANGE

des~re~.I

mternatlonal character set using

SeIecType.

MACRO

set the

section earlier in this chapter.

The format of the Master Select code is shown below:
ASCII:

Decimal:
Hexadecimal:

Esc

!
27 33

IB

21

”
n
n

The variable n is a number that identifies the mode or combination of
modes. To find the value of n. use the following table to add up either
the decimal or hexadecimal numbers for the featurrs you want.

Feature

10

CD!

12

CPl

PWPiXllOll.3

condensed

empnasued
double.strlke
doublewde

ItalCS

underlme

Dec.

a

16

32

64

128

0

1

2

4

Hex.

00
01

02

04 I

08

10

20

40

60

I

:

!

I
1

J

LQ-2550-4

9/22/89

24-Pin Printers

LQ-2550 GRAY DOT-MATRIX PRINTER

.

.~. _.

_--b-w

Commands in Numerical Order

The following list shows control codes and ESC sequences (with their
decimal and hexadecimal values), and the page number where the
complete command description can be found.

so

SP

<

>

A

Dee

Hex Description

7 07
8 08

9 09
10 OA
11 08

l2oc

13 OD
14 OE
15 OF
17 11
18

12

19 13
20

14

24 18

I27

7F

14 OE

15 OF

25

19
32 20
33 21

3.5 23
36 24
37

25

38 26
422A
43

28

45 2D
47

2F
4830
SO

32
51 33
52 34
53

3.5

5436

55

37

58

3A
60 3c
61 3D
62 3E

63 3F

6440

65 41
6642

67 43

67 43
6844
69 45
70 46
n 47
7248
74

4A

75 4B
76 4C
77 4D
78 4E
79 4F

80.50
81 51
82 52
83 53
83 53
8454

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

Wr

Backspace

Tab horizontally ......................

Line feed

Tab vertically

Formfeed ...........................

Carriage return ...................... .8-12

Select doublewide mode (1 line) ........

Select condensed mode ................. 824

Select printer .........................

Cancelcondensedmode.. ............. .8-25

Deselect printer .......................

Cancel double-wide mode (1 line) ........ E26

Cancel line ...........................

Delete character ......................

Select double-wide mode (1

Select condensed mode .................

Cut sheet feeder mode .................

Set intercharacter space ............... .8-30

Master Select .........................

Cancel MSB control .................. .8-11

Set absolute print position
Select user-defined

Define user-defined characters ........... 832

Select
Select

Turn

Select vertical tab channel ............. .8-18

Select

Selectl/6-iilinespacing

Select

Select italic mode ..................... 831

Cancel italic mode ....................

Enable printable characters .............

Enable upper control codes .............

Copy ROM to RAM .................. 833

Unidirectional mode (1 line) ............

Set MSB to 0 .........................

Set MSB to 1
Reassign

Initialize printer .......................

Select

Set vertical tabs .......................

Se4

Set page length in inches ...............

Set horizontal tabs ...................

Select emphasized mode

Cancel emphasized mode ...............

Select double-strike mode .............

Cancel double-strike mode .............

Perform n/180-inch line feed ............

Select single-density graphics ............

Select double-density graphics ...........

Select 12 cpi

Set skip over perforation ...............

Cancel skip over perforation ............

Select 10 cpi

Set right margin ......................

International character set .............. 832

Select superscript mode ...............

Select subscript mode

Cancel superscript/subscript ............

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

........................... .8-14

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

lime)

.........

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

set

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

graph&

mode ................. .8-35

n/36&nch

underlining on/off ................

1/8-m&t

n/l8Oinch

n/winch

page length in lines .................

line spacing .......... .8-16

line

spa&g

............ .8-15

line spacing .......... .8-15

........................ .8-11

graph+

mode

line spacing ...........

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

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

............ .8-15

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

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

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

ASCII

BEL
BS

I-i-r

LF

vr
A

CR

so
SI

E

DC3

DC4
CAN

DEL

Esc

Esc SI

ESCEM

Esc

ESC!

=cif

ESCS

Esc %

ESC&

ESC’
Esc+

ESC-

ESCi

Esco

ESc2

ESc3

ESc4

ESc5
ESCb

ESC7

Esc:

Esc

Esc =

Esc

ESc7

EsC@

ESCA
ESCB
Escc

E!xco

ESCD
ESC E
ESC F

EKG

ESC H

ESCJ

ESCK

ESCL

ESCM
ESC N
Esco
ESC P

=CQ

ESCR
ESC SO

lx Sl

ESCT

Page

8-12

8-19

8-20

8-17

a13

.a25

8-8

a12

8-25
8-24

8-10

g-22

.8-19
,833

8-29

8-32
8-33
8-34

E-11

.a36

.&lb

8-17

8-13

8-13

,821
,827

8-27

,828

8-28
8-16
8-34

8-34
E-23
8-14

8-14

a23

ax3

. &28

828
8-29

8-9

8-9

8-9

8-8

iAsal
’ Escu

ESCW
ESCY

ESCZ

EC\
ESCa
ESCb

=cg
ESCk

ESCI
ESCP

E’
EC:
ESCW

Escx

Esc (-

DEC.

Ha

85.55

87 57
8959
90

925c

97 61

98

103

107 68

108

112

m

113 n
114
116 74

119

120

78

4028

Desaiption

Unidirectional mode on/off .............

Turn

double-wide mode on/off

High-spesddblety
Quadrupltdensity~phh

SA

Setmlativeprintposition..

S&t justihtion
Setvatlcaltabsinchannels..

62

sdascpi..

67

Sefecttypestylefamily

set left margin

bc

Turn

proportional mode on/off .........

Sekt

character style

Select printing color ...................

72

Select character table

Turndouble-highmodeon/off

77

SelectL.etterQualityordraft

..

Line

..-

S&ct

~C&CS ........

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

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

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

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

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

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

................. .8-29

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

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

.....................-.......... ......

.........

..........

.........

Page

a10

.a25;1

a35

a35

au)

S-30

.817

a23

.822

a18

.&?4

a27

a31

.a26

a21

...8-29

!

j

\
;

1
i

/

(
i
:
)

24-Pin Printers

9/22/89

LQ-2550-5

LQ-2550 IVORY DOT-MATRIX PRINTER

Cable cover

Ribbon cartridge

Cross-head

&

scre~u driver

Power cable

Optional connector lock nuts

Paper guide

Platen

5

knob

Printer Specifications

Printing

Print method:

print speed:

Quality

Draft

LO

24-pin impact dot matrix
See table below.

CPI

10
12
10

12

Characters/second/line

333

4cO

111
133

Paper feed methods:

Paper

width:

Paper length:

Paper thickness:

Printable area:

Single

3mm

--~

sheet

Friction

-~

Built-in push feed tractor

Pull

tractor (optional)

Double-bin cut sheet feeder (optional)
Single sheets

7.15

to 14.3 inches

Continuous

4.0 to 16.0 inches

Envelope

No. 6 (166 x 92 mm),

No. 10 (240 x

Label

2-l/2

X

15’16

4 X

U/16

4 X

l-7/16

SingIe

sheets

3.7 to 14.3 inches

Single sheets

0.0026 to 0.004 inches

Continuous

Envelope

Iabel

-3

to 0.018 inches (0.06 to 0.46 mm)

0.0023

to 0.0197 inches (0.16 to 0.52 mm)

0.0063

inches (maximum 0.19 mm)

0.0075

mm

(0.12”)

or

mom

104

inches,

inches,

inches,

mm)

(182

to

364

mm)

(101

to 406

mm)

(94

to 364 mm)

(0.065

to 0.1 mm)

Continuous paper

Printing

direction:

Line spacing:

Paper feed speed:
Printable columns:

Character size

10

CPI

10

CP~

condensed

12

CPI

12 cpt

condensed

Buffer:

Character fonts:

Font
Epson Draft
Epson Roman

Sam SWlf

Epson

cower

Epson

Prestige

Epson

Scrqt

Epson

OCR-A

Epson

Epson OCR-B

Characters:

Bidirectional logic-seeking for text and
graphics. Unidirectional available through

SelecType

l/6’, l/S’,
1/6Oth. l/lSOth

83 mslline at

or software command.

or programmable in increments of

or 1/360th of an inch

l/6’

line spacing

See table below.

MaxImum

printed characters

136

233

163

272

8 Kbyte

Available Sizes (characlers per

to.12 15

10.12.15. PrOcoltlOnal

10 12.15. Prowrtlonal

10.12.15. Procomonal
10

12.15. Prowmonal

10 12.15. Prowrtlonal

/

10.12.

Prwrllonal

10.12.

Prcoorlbonal

1nch1

96 standard ASCII character set
(including italic characters)

13 international character sets
Epson Extended Graphics characters

width

13.5 mm

(0.53-J

or

more

I

101 to 361 mm (4.0 to
13 mm (0.51 “J or
406 mm

(I6.0’) paper

26 mm

(2.02’)

man?

or more

15.0”) I:

width

‘For printable area for envelopes, see page A-S.

Number of copies:

Continuous, multi-part, no carbon: one
original plus up to five copies. Total thickness

must not exceed 0.018’ (0.46 mm)

Ribbon:

Black

ribbon cartridge

#?762:

Life expectancy (in Letter Quality
characters, at 48 dots/character): 3 million

Color ribbon cartridge

#7763:

Life expectancy (in Letter Quality

characters, at 48 dots/character)

i

Black:

cyan:
Magenta:
Yellow

1.0 million

0.7 million

0.7 million

0.5 million

Film ribbon cartridge #7764:

Life expectancy (at 10 cpi. with bi­directional printing, using 136 columns):

0.1 million’

l This number may vary depending on

print direction, characters per inch, or
text density per page.

LQ-2550-6

24-Pin Printers

LQ-2550 IVORY DOT-MATRIX PRINTER

;

MCBF:

MTBF:

Print head life:
Dimensions and weight:

Voltage:

Power

consumption:

Frequency:

insulation resistance:

TIC stmqth

Temperature:

Humidity:

Shock:

Vibration:

(between AC line and chassis):

For all comoonents excludinn mint head:

5

million

l&s

6ooo

power-on hours (at

200 million strokes per wire

Height:
Width:

Depth: 20.4’

Weight: approx. 44

120

400 watts maximum

49.5 to 60.5 Hz

10M

Can withstand 1.25 kV rms applied for one
minute

Operation:
Storage:

Operation: 10% to

condensation)
Storage: 5% to 85% (without condensation)

Operation: Up to 1 G

Storage: Up to 2 G within 1
Operation: Up to 0.25 G at up to 55

Storage: Up to 0.50 G at up to 55

7.7’

26.6’

VAC f 10%

ohms between AC power line and chassis

40°F

to

-22°F

to

140°F (-30°C

25%

Ibs

95°F (5OC

80%

(without

within 1 ms

-.

duty)

to

ms

350C)

to

Hz

60°C)

Hz

Reliability

MCBF (Mean Cycle Between

Environmental condition4

Temperature:

Humidity:

Paper

Width

L=d

Thickness

Weight:
Printable

area:

Single sheet
binlandbin2

7.17’ to 14.3’

(182mm

0.27’ to 14.3’

(21Omm

0.0028’ to 0.0039’

(0.07mm

17 to 22 lb. paper

Operation:

Storage:

Operation:

Storage:

to 364mm)

to 364mm)

to O.lmm)

Failure):

100,000

cycles

+41”F

(+35oc)

-22°F (-30°C) to

(+70”(I)

15% to 80% without
condensation
5% to 90% without
condensation

(+S’C)

to

+9s°F

+158”F

envelope

bin

1

6.50’ to 9.49’

(166mm

to 241mm)

3.62’ to 4.09’
(92mm to

0.0063 to 0.0205”

(0.16mm

12 to 24 lb. paper

104mm)

to

0.52mm)

The Cut Sheet Feeder

Dimensions

Bin

l Envelopes can only be used in bin 1.

Stacker

Face down

Face up

24-Pin Printers

capacity:

and weight:

capacity:

26.7’(W) X

(mounted on the printer)
approx. 13.2

bin 1

Single

sheets: Up to 150 sheets of 22

Envelopes’: Up to 25 (plain and bond type)

bin2

Single

sheets: Up to

(Total thickness should not exceed 0.59’ or

15mm)

Single sheets:

Envelopes:

Single sheets:

Envelopes:

22.9*(D)

x

16.5’(H)

Ibs.

15mm)

(air

mail)

lb.

lb.

Up to 185 sheets of 17 lb. paper

(Total thickness should not
exceed 0.59’ or

Up to 30 (air mail)

150

sheets of 22

Up to 185 sheets of 17 lb. paper

up

to 60 sheets of 22 lb.

paper

up to 75 sheets of 17 lb.

paper

Up to 10 (plain and bond

type)

Up

to 12 (air mail)

up to 150 sheets of 22 lb.

paper
up

to 185 sheets of 17 lb.

paw

Up to 25 (plain and bond

type)

Up to 30

paper

paper

9/22/89

The following is a typical example of a software setup required for
proper operation of your cut sheet feeder. Not all software is set up the
same, so you may find that a bit of experimentation is required before
you find the best equivalent settings to use.

To maintain 54 printed lines per page make the following changes:

Page Length

Top Margin

Bottom Margin

Continuous Cut sheet

form settings

66

b
6

feeder settings

61

4
3

LQ-2550-7

LQ-2550 IVORY DOT-MATRIX PRINTER

---

Interface Specifications

I

I

Your printer is equipped with both a parallel and a serial interface. For
specifications for optional interfaces, see the manuals provided with the
optional interfaces.

Parallel interface
The following tables describe the parallel interface.

Pm assignmenb for the parallel interface
Connector pin assignments and a description of their respective interface

signals are shown in the following table.

I Sml

I

ktum

I

in

Pin

1

19

2

20

3

2

2

s:

6

;:

B

27

10

28

11

29

l All interface conditions are based on

S$nal

STROBE

DATA 1

F% ;

DATA 4
DATA 5
DATA 6

ii% ;

?if.xtm

BUSY

tire

tm

IN

STROBE pulse to read data in Pulse

mdth

must be more than

mwxeconds

IN

These

IN

the 1st lo 8th

IN

respectively.

IN

when data IS

IN

logIcal

0.

II

IN

CUT Abel

OUT A HIGH

a 11

indicates that data has been recewed

and that the

more data.

cannot
HIGH in the

1)

Dung

2)

Dunng prlntmg

3) When ofl line

4)

Dunng prrntererror

Tn

cemplmn

at the

signals

recewng termwk

represent

brts

of parallel data,

Each

slgnal IS

lqcal

1 and LOW when It

-mIcrosecond
prlnier IS

ready lo accept

slgnal lndrcates

recewe

data. The

lollowng

data entry (ea. char: time)

cases’

state.

level. Both the rise and the

0.5

lnformatlon

at

HlGH

pulse.

LOW

that the

pnnler

srgnal

goes

of
level

fall times of each signal must be less than 0.2 miuoseconds.

l Data transfer must be carried out by

obsening

the ACKNLG or
BUSY signal. Data transfer to this printer can be carried out only
after receipt of the

Am

signal or when the level of the BUSY

signal is LOW.

Printing enabled/disabled signals and control

condition

The following table shows the relationship between printing being
enabled or disabled, the on line/off line status, and the receipt of the data

onioff

control characters, DC1 or

ON LINE

SLctlN DClIDC3 i%RjR BUSY -

DC&

~~

on

lme

on line

on

line

High

High

High/Low

(M, effect) (no dfeet)

DC1
Raov’d

DC3
Recv’d

DClIDC3

L

High

High

OW

High/Low Pulsed

High/Low Pulsed

High

ea. char.

aa.

char. oisabled’

gNBOrneratad

Enabled

Disabled

Default Settings

The following table shows the default conditions that become valid when
the printer is initialized.

bln

Top

of form
Left and
line

Mrtcal tab

Horizontal

VFU

Font
Userdefined characters

In addition, the data

poWion

nghl margms

spacng

pasltlons

tab pxtbons

channel

selectron

bufkr

I

lCurrent

paper

]SelecType setfing
(

W-inch line

Cleared
Every

ecght

Channel 0

characters

Reset lo the current

Hardware: Cleared

JsOffware:

Deselected only

is cleamd when the printer is

posltion

spacing

Reset lo:

SelecType

setting

initial&d

I

by

turningonthepowerorbysendinganINITsignal.

Note: The userdefined character set is not cleared when the

printer is initialized by ESC @.

I

I

Choosing from a merm

IS

Because the family of Epson printers shares many commands. you can
use an application program even if it does not list the LQ-2550 on its
printer selection menu. If the LQ-2550 is not listed, select the first printer
available on the following list:

W-=
LQ-1050 (LQ-8.50)
LOloo0

(Los001

K?-=J

LQ-1500

If

none of these printers is

following

list:

lied,

select the first one available on the

LQ

EX
FX

LX
RX
MX
Epson printer
Standard printer
Draft printer

If you are printing in color, it is recommended that you choose LQ-2550

or LQ-2500.

To use all the features of the LQ-2550, however, it is best to use a
program with the LQ-2550 on its menu. If your program does not list
this printer. contact the software manufacturer to see if an update is
available. For further information on using software, see Chapter

WARNING When you print on envelopes, be sure that your
application program settings keep the printing entirely within
the printable area shown below.

4.

I

r-----i

8.5 mm

‘While printing is disabled, character data is being received and

acknowledged so that the printer can look for another

DC1

character,

which would allow it to resume printing.

Compatible interfaces
The following is a list of Epson interfaces that are compatible with your

LQ printer.

Interface number

X8143
X8148

rr8165

Name
New

serial interface
lrxelllgent serra~ mterface
Intellgenc

IEEE.488 Interface

LQ-2550-8

I

9/22/98

22 mm

(0.87’)

or

more

Note: If the printed results are faint. use the PLATEN GAP ADJUST
button to adjust the distance between the mint head and the platen.

24-Pin Printers

LQ-2550 IVORY DOT-MATRIX PRINTER

--

The Display

1

Roman

Some of the fonts do not offer all pitches.

Draft 10.

Aoman

10.

Sens Serif 10.

Courier 10.

Prestige

Script 10.
OCR-A 10.
OCR-0 10.

International character sets

country

U.S.A.

0
1

France

Germany

2

U.K.

3

Denmark I

4

Sweden

5

Italy

8

Spam I

7

Japan

8

Norway

9

Denmark II

10

Spam

11

Latm

12

II

America

2

!3

E

24 40

PITCH

a

10

12. 15

12. 15.

12. 15.

12. 15.

12. 15.

10.

12. 15.

12.

Propomona

12.

Prcportfonal

ASCII coda (hex)

5C505E 60

58

CPI]

See

the table below.

Proporrlonal
ProportIonal

ProportIonal
Proportional

Proportional

707C7D

7E

1

Graphics

1

Individual graphics option commands

There are four individual graphics option commands that are very much

the same as the ESC l command, but each one works for only one
graphics option. All these commands are for &pin graphics options.
Note that the commands contain one less variable than the ESC l
command because they don’t need to select a graphics option.

The commands are shown below:

m

Horiz densit)

rh+.,in

ln

lhls mode

Pins

1

Option

7

’ Adlacent do%

cannot be printed

!

To select the desired international character set using

COUNTRY option by following the steps in the CHANGE MACRO

section earlier in this chapter.

The format of the Master Select code is shown below:
ASCII:

Decimal:

Hexadecimal:
The variable n is a number that identifies the mode or combination of

modes. To find the value of n. use the following table to add up either

the decimal or hexadecimal numbers for the features you want.

Feature

1OCPl

12CPI

procortlonal

condensed

eft7OhaSlZed

double-Slrtke
douOlewde

leaks

underlme

ESC ! n

27 33 n
IB 21 n

SelecType.

Dec.

0

1

2

4

8

16

32 20
64

128

I

I

!

set the

Hex.

00

01
32
04

08

10

40
80

24-Pin Printers

I

I

/

i
I

9/22/89

LQ-2550-9

LQ-2550 IVORY DOT-MATRIX PRINTER

--­Commands in Numerical Order

I

,

The following list shows control codes and ESC sequences (with their
decimal and
complete command description can be found.

ASCII

BEL

BS

I-l-r

LF

VT

FF
CR
so
SI

DC1

DC2
DC3
DC4
CAN
DEL
Esc so

Esc SI

ESCEM

Esc

-

ESC!

EC#
ESCS
ESC%

ESC
ESC’
ESC +
ESC

ESC/

Esco
ESCZ

Esc3

Esc4

ESCS

ESC 6

ESC 7

ESC :
ESC <
ESC =
ESC >
ESC ?
ESC @
ESC A
ESC B
ESC C
ESC C0
ESC D
ESC E
ESC F
ESC G
ESC H
ESC J
ESC K

ESC L
ESC M
ESC N

ESC O

ESC P

ESC Q

ESC R

ESC SO
ESC S1
ESC T

hexadecimaJ

Dec. Hex Description Page

7 07

8 08
9 09

10 0A
11 08

l2oc

13 0D

14 0E Select double-wide mode (1 line) ........ .8-25

15 0F Select condensed mode ................

17 11 Select printer .........................

18 12

19 13 Deselect printer .......................

20 14 Cancel double-wide mode (1 line) ........

24 18

I27

14 OE Select double-wide mode (1 line) .........

15 OF Select condensed mode .................

SP

&

-

2.5 19

32 20
33 21

3.5 23 Cancel MSB control ................... 811

36 24 Set absolute print position ..............

37 25Select

38 26 Define user-defined characters .......... .8-32

422A

43 2BSelect n/Winch line spacing ...........

45

47 2F

4830 Select

SO
51

52 34 Select italic mode ..................... a31

53 3.5 Cancel italic mode .................... a32

5436 Enable printable characters .............

5.5

58 3A Copy ROM to RAM ..................

60 3c

61 3D
62 3E
63 3F

6440 Initialize printer .......................

65 41

6642

67 43

67 43

6844 Set horizontal tabs .................... 821

69 4s

70 46

7l

72 48

74
75
76 4C

77

78 4E Set skip over perforation ...............

79 4F

80 50

81 51
82 52

83 53 Select superscript mode ................ 828

83 53

84

values), and the page number where the

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

B-F

Backspace

Tab horizontally ..................... .8-20

Linefeed ............................8-14

Tab vertically
Formfeed

Carriage return ..................... ..8-12

Cancel condensed mode

Cancelline...........................8-12

7F

Delete character ......................

Cut sheet feeder mode ................ .8-10

Set intercharacter space ................

Master Select .........................

Select graphics mode .................

2D

Turn

Select vertical tab channel ............. .8-18

32 select

33 Select

37 Enable upper control codes ............. 834

UnidirectionaJ mode (1 lime)

SetMSBtoO.

Set MSB to 1.........................

Reassign graphics mode ...............

Select

Set vertical tabs .......................

Set page length in lines

Set page length in inches ...............

Select emphasized mode ...............

Cancel emphasized mode ...............

47

Select double-strike mode ..............

Cancel double-strike mode .............

4A

Perform n/W-inch line feed ............

48

Select single-density graphics ...........

Select double-density graphics ........... 834

4D

Select 12 cpi

Cancel skip over perforation ...........

Sekt

Set right margin .....................

International character set

Select subscript mode .................. 828

54

Cancel superscript/subscript ............

...........................8-19

....................... .8-17

......................... ..8-13

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

userdefinedset

underlining on/off ................

l%iich

l/&inch

n/180-&h

n/Winch

iocpi

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

line spacing .............

line spacing ............. a15

line spacing ........... a15

............ a9

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

line spacing ...........

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

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

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

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

........

Page

a10

.a25

a35
a35

a20

a30

a17

a23

a22

al8

a24

a27

8-26

a21

I

1

,812

.824

8-8

.8-23

8-9

8-26

8-9

8-25

8-24

8-30

ASCII
ESC U

ESC W
ESC Y
ESC Z
ESC

ESCa
ESCb

ECg

ESCk
ESCI

ESCP
=cq

ESCr
Esct
Escw

ESC X

Dec. Hex Description

85.5

87 57

8959

90

5A

92

\

SC

97 61

98 62
103 67
107

108

112

70
113
114 72
116 74

119 77

UO

78

Unidirectional mode on/off

Turn

double-wide mode on/off

Highspeed dbie-dkty
QuadrupJedensity graphics
Setrefativeprintposition..
select justification

Set

vertical tabs in channels

skt

Selecttypestylefamily

6B

set

left margin

6C

Tim proportional mode on/off
Select character style

n

Select printing color
Select character table

Turn

&lect~terQuaJityordraft

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

15

cpi

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

double-high mode on/off

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

.........

ga~hic~

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

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

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

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

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

..........

.................. a29

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

................. .8-31

..........

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

a22

a19

a33

,835

8-16
8-29

ais

8-33

8-33

8-11

8-11

,836

8-8

,816

a17
a13

a13

,827

a27

8-28

8-28
8-16

,834

a23

a14

,814

a23

.818

832

8-29

LQ-2550-10

24-Pin Printers