Epson LQ-2550 Quick reference guide

LQ-2550 GRAY DOT-MATRIX PRINTER
Paper feed methods:
Friction-
Built-in push feed tractor
Pull tractor (optional)
Double-bin cut sheet feeder (optional)
Paper width: 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 x92 mm),
No. 10 (240 x104 mm)
label
2-l/2 X 15i16 inches,
4 X 15116 inches,
4 X l-7116 inches,
Paper length:
Single sheets
3.7 to 14.3 inches (94 to 364 mm)
Paper guide
Ribbon cartridge
Power cable Platen knob
Paper thickness:
Single sheets
I
0.0026 to OX04 inches (0.065 to 0.1 mm)
Printer Specifications
Printing
Print method: 24-pin impact dot matrix
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
I
0.0075 inches (maximum 0.19 mm)
Printable area:
Sing.ie sheet
8.5 mm (0.33’) or more
Continuous paper
Print speed: See table below.
Ouality
malt
LO
CPI
Characterslsecondlline
10 333
12 AW
10 111
12 133
.3 mm f0.12’J
or more
3mm
Printing direction: Bidirectional logic-seeking for text and
graphics. Unidirectional available through
SeiecType or software command.
tine spacing:
Paper feed speed:
Printable columns:
l/6*, l/B’. or programmable in increments of
1/60th, l/lBOth or 11360th of an inch
.
83 msiiine at l/6’ line spacing
See table below.
IOZ to hl mm f4.0 to 15.&J paper
I3 mm fO.51’J or more
406 mm (16.0’) paper width
26 mm (1.02’) or more
width
Character exe
IOCPI
lOcp! condensed
12CPI
12 CPI condensed
! Maxcmum printed characters
I 136
!
233
1 163
272
‘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)
Buffer:
Character fonts:
8 Kbyte ---
-
Characters:
Ribbon: Black ribbon cartridge 17762:
Life expectancy (in Letter Quality
96 standard ASCII character set
(including italic characters)
13 international character sets
Epson Extended Graphics characters
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:
0.7 million
Magenta:
0.7 million
Yellow 0.5 million
Film ribbon cartridge # 7764:
Life expectancy (at 10 cpi, with bi-
directional printing, using 136 columns):
0.1 million’
l This number may vary depending on
print direction, characters per inch, or
text density per page.
1 EpsmF3wnom 1 lalzlr~
I
‘orrcr-s 10
I
~opaaurWilhSl*MllnKomMOdU~
24-Pin Printers 9/22/89 LQ-2550-1

LQ-2550 GRAY DOT-MATRIX PRINTER
MCBF:
a-...=.. . I,
For all components excluding print head:
5 million lines
Reliability
MTBF:
Print head life:
Dimensions and weight:
MCBF (Mean Cycle Between Failure): 100.000 cycles
Voltage:
Power consumption:
Frequency:
Insulation resistance:
6000 power-on hours (at 25% duty)
200 million strokes per wire
Height: 7.7’
Width: 26.6’
Depth: 20.4’
Weight: approx. 44 Ibs
120 VAC + 10%
400 watts maximum
49.5 to 60.5 Hz
ZOM ohms between AC power line and chassis
Dlelectri~ strength (between AC line and chassis):
Can withstand 1.25 kV rms applied for one
minute
Temperaturez
Operation: 40°F to 95°F (5°C to 35°C)
Storage: -22°F to 140°F (-30°C to 60DC)
Humi+:
Operation: 10% to 80% (without
condensation)
Shock:
Vibration:
Storage: 5% to 85% (without condensation)
Operation: Up to 1 G withii 1 ms
Storage: Up to 2 G within 1 ms
Operation: Up to 0.25 G at up to 55 Hz
Storage: Up to 0.50 G at up to 55 Hz
The Cut Sheet Feeder
I
I
Dimensions and weight: 26,7’(W)
X 22.9’(D) x 16.5’(H)
(mounted on the printer)
approx. 13.2 Ibs.
Bin capacity:
bin 1
Single sheets. Up to 150 sheets of 22 lb. paper
Up to 185 sheets of 17 lb. paper
(Total thickness should not
exceed 0.59’ or 15mm)
Envelopes’: Up to 25 (plain and bond type)
Up to 30 (air mail)
bin 2
Single sheets: Up to 150 sheets of 22 lb. paper
Up to 185 sheets of 17 lb. paper
(Total thickness should not exceed 0.59’ or
15mm)
’ Envelopes can only be used in bin 1.
Stacker capacity:
Face down
Single sheets:
Up to 60 sheets of 22 lb.
paper
Up to 75 sheets of 17 lb.
paper
Face up
Envelopes:
Up to 10 (plain and bond
type)
Up to 12 (air mail)
Single sheets: Up
to 150 sheets of 22 lb.
paper
Up to 185 sheets of 17 lb.
paper
Envelopes:
Up to 25 (plain and bond
type)
Up to 30 (air mail)
Tempera-
Humidity:
Operation:
storage:
Operation:
Storage:
f41”F (+5”C) to +95OF
( +3s0cj
-22°F (-30°C) to +15BaF
(+7o”c)
15% to 80% without
condensation
5% to 90% without
condensation
Width
Length
Thickness
Weight:
Printable
area :
Single sheet
binlandbin2
7.17’ LO 14.3’
(182mm to 364mm)
8.27’ to 14.3’
cmmm to 364mm)
0.0028’ to 0.0039’
007mm to O.lmm)
17 to 22 lb. paper
envelope
bin1
6.50’ to 9.49’
(166mm to 24lmm)
3.62’ to 4.09’
(92mm to 104mm)
0.0043’ to 0.0205’
(0.16mm to 0.52mm)
12 to 24 lb. paper
22mm
(0 87’)
or m*re
The following is a typical example of a software setup required for
proper operation of your cut sheet feeder. Not ail 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
form settings
66
6
6
Cut sheet
feeder settings
61
4
3
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 paralleI interface
Conmctor pin assignments and a description of their respective interface
signals are shown in the following table.
SlgM
kann
kc-
Pin
An
Snld
lrn
OwrriutlMl
1
19
STROBE
lN STROBE pulse to read dala rn Pulse
wdth must be more than 0 5
mrcroseconds at Ihe recewrng termrnal
:
z:
DATA 1
IN
DATA 2
These srgnals represent lnformatton of
IN
4
2
2 E ,”
the 1st 10 8th bits of parallel data.
IN respectrvely Each srgnal IS at HIGH level
IN
2
DATA 5
when dala IS logrcal 1 and LOW when II IS
7
: SF
k%;
IN Iog~alCI.
IN
10
11
DATA 6
26 ?i7TRlm
29 BUSY
IL!
OUT About a 1 l~mrrosecond puke. LOW
Indicates that data has been recetved
and lhal the prtnter IS ready lo accept
more data
OUT A HIGH srgnal lndrcales that Ihe punter
cannot recerve data The srgnal goes
HIGH I” the lollowng cases:
1) Dunng data entry (ea char. trme)
2) Dunng prrntmg
31 When off lrne
II
I 14) Durrng prrnler-error state.
lAll interface conditions are based on Tn. level. Both the rise and the
fall times of each signal must be less than 0.2 microseconds.
lData 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
‘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 Name
#El43
New sew mteriace
x8148
lntelllgenr send rnreriace
X8165
Inle%gent IEEE-488 Interface
Default Settings
I
The following table shows the default conditions that become valid when
the printer is initialired.
/
I
Item Reset
lo:
Tap of formpasSlcn
Current paper cosdion
Len and right margtns
SeIecTyve seItw
line spacing
l/&inch line spacing
Mbcal tab posrtions
cleared
Horrzontal tab pasllions Every eight characters
VFU chanti
Channel 0
Font selectton
Reset to the current SelecTwe setting
Userdehned characlers Hardware: Cleared
Software: Deselected only
In addition, the data b&r is cleared when the printer is initial&d by
tumingonthepowerorbysendinganINITsignal.
Note: The userdefined character set is not cleared when the
printer is initialized by ESC @.
I
Choosing from a menu
Because the family of Epson printers shares many commar& you can
use an application program even if it does not lit the LQ-2550 on its
printer selection menu. If the LQ-2550 is not listed, select the first printer
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.
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
I
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
24-Pin Printers LQ-2550-3

LQ-2550 GRAY DOT-MATRIX PRINTER
r-l
PITCH
[ 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
ASCII code (hex)
23 24 40 58 5C 5D 5E 60 78 7C 7D 7E
V.S.6
FRPlNCE
GERMW+Y
U.K.
DENMAR KI
DENPIARK II
SPAIN II
LATIN mERIC*
I(ORE&
LEGAL
To select the des~re~.I mternatlonal character set using SeIecType. set the
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:
Esc ! ”
Decimal:
27 33 n
Hexadecimal: IB
21 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
Dec.
10 CD!
0
12 CPl
1
PWPiXllOll.3
2
condensed
4
empnasued
a
double.strlke
16
doublewde
32
ItalCS
64
underlme 128
Hex.
I
00
01 :
02 !
04 I
08
I
10 1
20
40
60
J
In&id-id 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. AII these commands are for B-pin graphia options.
Note that the commands contain one less variable than the ESC *
command because they don’t need to select a graphics option.
The commands are shown below:
-.., ., I -, - I
Singledenslty
1 24 [ 32 1
60
nn,hb~.n.,t”
I -34 I 11 I
,m
----.- -“,.“,.,
--
CRT Ill
24
Tnple.densny
24
Hexdenslty’
24
* AdlaCenI dots cannot be printed I” lhls mcde
-I
,S”
38 1
90
39 !
180
40 1
360
LQ-2550-4 9/22/89 24-Pin Printers

LQ-2550 GRAY DOT-MATRIX PRINTER
. .~. _.
_--b-w
iAsal
Page !
Commands in Numerical Order
DEC. Ha Desaiption
’ Escu
85.55
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.
Dee
A
ASCII
BEL
BS
I-i-r
LF
vr
A
CR
so
SI
E
DC3
DC4
CAN
DEL
Esc so
Esc SI
ESCEM
Esc SP
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
7 07
Hex Description Page
Wr
.............................. 8-12
Backspace ........................... 8-19
Tab horizontally ...................... 8-20
Line feed ........................... .8-14
Tab vertically ........................ 8-17
Formfeed ........................... a13
Carriage return ...................... .8-12
Select doublewide mode (1 line) ........ .a25
Select condensed mode ................. 824
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
ESCW
ESCY
ESCZ
EC\
ESCa
ESCb
=cg
ESCk
ESCI
ESCP
E’
EC:
ESCW
Escx
Esc (-
87 57
8959
90 SA
925c
97 61
98 62
103 67
107 68
108 bc
112 m
113 n
114 72
116 74
119 77
120 78
4028
Unidirectional mode on/off ............. a10
Turn double-wide mode on/off .a25
;
1 .........
High-spesddblety ~C&CS ........ a35 j
Quadrupltdensity~phh ............. a35
Setmlativeprintposition.. au)
\
............. ;
S&t justihtion ..................... S-30
Setvatlcaltabsinchannels.. .......... .817
sdascpi.. ........................ a23
1
Sefecttypestylefamily .822
i
................
set left margin a18
/
........................
Turn proportional mode on/off ......... .&?4
Sekt character style ................. .8-29
Select printing color ................... a27
(
Select character table
i
.................. a31 :
Turndouble-highmodeon/off ......... .a26
SelectL.etterQualityordraft
)
............ a21
S&ct Line
.. ..- ..................... -. ............... ...8-29
Select printer ......................... 8-8
Cancelcondensedmode.. ............. .8-25
Deselect printer ....................... 8-9
Cancel double-wide mode (1 line) ........ E26
Cancel line ........................... a12
Delete character ...................... 8-9
Select double-wide mode (1 lime) ......... 8-25
Select condensed mode ................. 8-24
Cut sheet feeder mode ................. 8-10
Set intercharacter space ............... .8-30
Master Select ......................... g-22
Cancel MSB control .................. .8-11
Set absolute print position ............. .8-19
Select user-defined set .................
,833
Define user-defined characters ........... 832
Select graph& mode ................. .8-35
Select n/36&nch line spacing .......... .8-16
Turn underlining on/off ................ 8-29
Select vertical tab channel ............. .8-18
Select 1/8-m&t line spa&g ............ .8-15
Selectl/6-iilinespacing ............ .8-15
Select n/l8Oinch line spacing .......... .8-15
Select italic mode ..................... 831
Cancel italic mode .................... 8-32
Enable printable characters ............. 8-33
Enable upper control codes ............. 8-34
Copy ROM to RAM .................. 833
Unidirectional mode (1 line) ............ 8-9
Set MSB to 0 ......................... E-11
Set MSB to 1 ........................ .8-11
Reassign graph+ mode ............... .a36
Initialize printer ....................... 8-8
Select n/winch line spacing ........... .&lb
Set vertical tabs ....................... 8-17
Se4 page length in lines ................. 8-13
Set page length in inches ............... 8-13
Set horizontal tabs ................... ,821
Select emphasized mode ............... ,827
Cancel emphasized mode ............... 8-27
Select double-strike mode ............. ,828
Cancel double-strike mode ............. 8-28
Perform n/180-inch line feed ............ 8-16
Select single-density graphics ............ 8-34
Select double-density graphics ........... 8-34
Select 12 cpi .......................... E-23
Set skip over perforation ............... 8-14
Cancel skip over perforation ............ 8-14
Select 10 cpi .......................... a23
Set right margin ...................... ax3
International character set .............. 832
Select superscript mode ............... . &28
Select subscript mode .................. 828
Cancel superscript/subscript ............ 8-29
24-Pin Printers 9/22/89 LQ-2550-5

LQ-2550 IVORY DOT-MATRIX PRINTER
Cable cover
Ribbon cartridge
&
Cross-head scre~u driver
Paper guide
Power cable
Platen knob
5
Optional connector lock nuts
Printer Specifications
Printing
Print method:
print speed:
Quality
Draft
LO
24-pin impact dot matrix
See table below.
CPI
Characters/second/line
10
333
12 4cO
10
111
12
133
Printing direction:
Bidirectional logic-seeking for text and
graphics. Unidirectional available through
SelecType or software command.
Line spacing:
l/6’, l/S’, or programmable in increments of
1/6Oth. l/lSOth or 1/360th of an inch
Paper feed speed:
Printable columns:
Character size
10 CPI
10 CP~ condensed
12 CPI
12 cpt condensed
83 mslline at l/6’ line spacing
See table below.
MaxImum printed characters
136
233
163
272
Buffer: 8 Kbyte
Character fonts:
Font
Epson Draft
Epson Roman
Epson
Sam SWlf
Epson
cower
Epson
Prestige
Epson
Scrqt
Epson OCR-A
Epson OCR-B
Available Sizes (characlers per 1nch1
to.12 15
10.12.15. PrOcoltlOnal
i
10 12.15. Prowrtlonal
10.12.15. Procomonal
10 12.15. Prowmonal
10 12.15. Prowrtlonal
/ 10.12. Prwrllonal
10.12. Prcoorlbonal
Characters: 96 standard ASCII character set
(including italic characters)
13 international character sets
Epson Extended Graphics characters
--~
Paper feed methods:
-~
Friction
Built-in push feed tractor
Pull tractor (optional)
Double-bin cut sheet feeder (optional)
Paper width: 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 15’16 inches,
4 X U/16 inches,
4 X l-7/16 inches,
Paper length: SingIe sheets
3.7 to 14.3 inches (94 to 364 mm)
Paper thickness:
Single sheets
0.0026 to 0.004 inches (0.065 to 0.1 mm)
Continuous
0.0023
to 0.018 inches (0.06 to 0.46 mm)
Envelope
0.0063
to 0.0197 inches (0.16 to 0.52 mm)
Iabel
0.0075
inches (maximum 0.19 mm)
Printable area:
Single sheet
Continuous paper
3mm
-3 mm (0.12”)
or mom
I
101 to 361 mm (4.0 to 15.0”) I:
13 mm (0.51 “J or man?
13.5 mm (0.53-J or more
406 mm (I6.0’) paper width
26 mm (2.02’) or more
‘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)
Black:
1.0 million
cyan: 0.7 million
Magenta: 0.7 million
Yellow 0.5 million
Film ribbon cartridge #7764:
Life expectancy (at 10 cpi. with bi-
directional printing, using 136 columns):
0.1 million’
l This number may vary depending on
print direction, characters per inch, or
text density per page.
width
LQ-2550-6 24-Pin Printers

LQ-2550 IVORY DOT-MATRIX PRINTER
;
MCBF:
For all comoonents excludinn mint head:
5 million l&s
-.
MTBF:
6ooo power-on hours (at 25% duty)
Print head life: 200 million strokes per wire
Dimensions and weight:
Height: 7.7’
Width:
26.6’
Depth: 20.4’
Weight: approx. 44 Ibs
Voltage:
120 VAC f 10%
Power consumption:
400 watts maximum
Frequency:
49.5 to 60.5 Hz
Reliability
MCBF (Mean Cycle Between Failure): 100,000 cycles
Environmental condition4
Temperature:
Humidity:
Paper
insulation resistance:
10M ohms between AC power line and chassis
TIC stmqth (between AC line and chassis):
Can withstand 1.25 kV rms applied for one
minute
Temperature:
Operation: 40°F to 95°F (5OC to 350C)
Storage: -22°F to 140°F (-30°C to 60°C)
Humidity:
Operation: 10% to 80% (without
condensation)
Shock:
Vibration:
Storage: 5% to 85% (without condensation)
Operation: Up to 1 G within 1 ms
Storage: Up to 2 G within 1 ms
Operation: Up to 0.25 G at up to 55 Hz
Storage: Up to 0.50 G at up to 55 Hz
The Cut Sheet Feeder
Dimensions and weight: 26.7’(W) X 22.9*(D) x 16.5’(H)
(mounted on the printer)
approx. 13.2 Ibs.
Bin capacity:
bin 1
Single sheets: Up to 150 sheets of 22 lb. paper
Up to 185 sheets of 17 lb. paper
(Total thickness should not
exceed 0.59’ or 15mm)
Envelopes’: Up to 25 (plain and bond type)
Up to 30 (air mail)
bin2
Single sheets: Up to 150 sheets of 22 lb. paper
Up to 185 sheets of 17 lb. paper
(Total thickness should not exceed 0.59’ or
15mm)
l Envelopes can only be used in bin 1.
Stacker capacity:
Face down Single sheets:
up to 60 sheets of 22 lb.
paper
up to 75 sheets of 17 lb.
paper
Envelopes:
Up to 10 (plain and bond
type)
Up to 12 (air mail)
Face up
Single sheets:
up to 150 sheets of 22 lb.
paper
up to 185 sheets of 17 lb.
paw
Envelopes:
Up to 25 (plain and bond
type)
Up to 30 (air mail)
Operation:
Storage:
Operation:
Storage:
+41”F (+S’C) to +9s°F
(+35oc)
-22°F (-30°C) to +158”F
(+70”(I)
15% to 80% without
condensation
5% to 90% without
condensation
Width
L=d
Single sheet
binlandbin2
7.17’ to 14.3’
(182mm to 364mm)
0.27’ to 14.3’
(21Omm to 364mm)
Thickness
Weight:
Printable
area:
0.0028’ to 0.0039’
(0.07mm to O.lmm)
17 to 22 lb. paper
envelope
bin 1
6.50’ to 9.49’
(166mm to 241mm)
3.62’ to 4.09’
(92mm to 104mm)
0.0063 to 0.0205”
(0.16mm to 0.52mm)
12 to 24 lb. paper
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 feeder settings
66
61
b
4
6
3
24-Pin Printers 9/22/89 LQ-2550-7

LQ-2550 IVORY DOT-MATRIX PRINTER
---
I
Interface Specifications
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 tire
in
Pin
S$nal
tm
cemplmn
1
19
STROBE
IN STROBE pulse to read data in Pulse
mdth must be more than 0.5
mwxeconds at the recewng termwk
220
DATA 1
IN
3
2
F% ;
These signals represent lnformatlon of
IN
2
the 1st lo 8th brts of parallel data,
IN
s:
DATA 4
respectively. Each slgnal IS at HlGH level
IN
6DATA 5
when data IS lqcal 1 and LOW when It IS
B
;:
DATA 6
IN logIcal 0.
ii% ;
II
27 IN
10
28 ?if.xtm
CUT Abel a 11 -mIcrosecond pulse. LOW
indicates that data has been recewed
and that the prlnier IS ready lo accept
more data.
11
29
BUSY OUT A HIGH slgnal lndrcates that the pnnler
cannot recewe data. The srgnal goes
HIGH in the lollowng cases’
1) Dung data entry (ea. char: time)
2) Dunng prlntmg
3) When ofl line
4) Dunng prrntererror state.
lAll interface conditions are based on Tn level. Both the rise and the
fall times of each signal must be less than 0.2 miuoseconds.
lData 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 DC&
ON LINE SLctlN DClIDC3 i%RjR BUSY -
~~
on lme
High DC1
Raov’d
High High/Low Pulsed
Enabled
ea. char.
on line
High DC3
Recv’d
High
High/Low Pulsed
aa. char. oisabled’
on line
High/Low DClIDC3 L OW
High Disabled
(M, effect) (no dfeet)
gNBOrneratad
‘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 Name
X8143
New serial interface
X8148 lrxelllgent
serra~ mterface
rr8165
Intellgenc IEEE.488 Interface
Default Settings
The following table shows the default conditions that become valid when
the printer is initialized.
bln
Top of form poWion
I
Reset lo:
lCurrent paper posltion
Left and nghl margms
line spacng
]SelecType setfing
( W-inch line spacing
Mrtcal tab pasltlons
Horizontal tab pxtbons
VFU channel
Font selectron
Userdefined characters
Cleared
Every ecght characters
Channel 0
Reset lo the current SelecType setting
Hardware: Cleared
JsOffware: Deselected only
I
In addition, the data bufkr is cleamd when the printer is initial&d by
turningonthepowerorbysendinganINITsignal.
I
Note: The userdefined character set is not cleared when the
printer is initialized by ESC @. I
Choosing from a merm
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 lied, 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.
I
WARNING When you print on envelopes, be sure that your
application program settings keep the printing entirely within
the printable area shown below.
r-----i 8.5 mm
22 mm
(0.87’) or more
I
Note: If the printed results are faint. use the PLATEN GAP ADJUST
button to adjust the distance between the mint head and the platen.
LQ-2550-8 9/22/98 24-Pin Printers

LQ-2550 IVORY DOT-MATRIX PRINTER
--
The Display
1 Graphics 1
PITCH
a
1 Roman
10 CPI]
Some of the fonts do not offer all pitches. See the table below.
Draft 10.
12. 15
Aoman 10.
12. 15. Proporrlonal
Sens Serif 10.
12. 15. ProportIonal
Courier 10.
12. 15. ProportIonal
Prestige 10.
12. 15. Proportional
Script 10.
12. 15. Proportional
OCR-A 10.
12. Propomona
OCR-0 10.
12. Prcportfonal
International character sets
country
0U.S.A.
1 France
2
Germany
3U.K.
4
Denmark I
5
Sweden
8Italy
7Spam I
8
Japan
9Norway
10
Denmark II
11
Spam II
12
Latm America
E
2
ASCII coda (hex)
7
!3 24 40 58
5C 50 5E 60
70 7C 7D 7E
!
To select the desired international character set using SelecType. set the
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:
ESC ! n
Decimal:
27 33 n
Hexadecimal:
IB 21 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 features you want.
Feature
1OCPl
12CPI
procortlonal
condensed
eft7OhaSlZed
double-Slrtke
douOlewde
leaks
underlme
Dec.
Hex.
I
0
00
I
1
01 /
2 32
4
04
8
I
08
16
I
10
32 20
64 !
40 i
128 80
I
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:
1 Option
Pins m
Horiz densit)
rh+.,in
’ Adlacent do% cannot be printed ln lhls mode
24-Pin Printers 9/22/89 LQ-2550-9

LQ-2550 IVORY DOT-MATRIX PRINTER
---
I
Commands in Numerical Order
I
ASCII
,
1
The following list shows control codes and ESC sequences (with their
decimal and hexadecimaJ values), and the page number where the
complete command description can be found.
ESC U
ESC W
ESC Y
ESC Z
ESC \
ASCII Dec. Hex Description Page
ESCa
ESCb
Dec. Hex Description
Page
BEL
BS
I-l-r
LF
VT
FF
CR
so
SI
DC1
DC2
DC3
DC4
CAN
DEL
Esc so
Esc SI
ESCEM
Esc SP
- 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
7 07
B-F
............................. ,812
8 08
Backspace
...........................8-19
9 09 Tab horizontally ..................... .8-20
10 0A Linefeed ............................8-14
11 08
Tab vertically ....................... .8-17
l2oc Formfeed ......................... ..8-13
13 0D Carriage return ..................... ..8-12
14 0E Select double-wide mode (1 line) ........ .8-25
15 0F Select condensed mode ................ .824
17 11 Select printer .........................
8-8
18 12 Cancel condensed mode ............... .8-23
19 13 Deselect printer ....................... 8-9
20 14 Cancel double-wide mode (1 line) ........ 8-26
24 18 Cancelline...........................8-12
I27 7F Delete character ......................
8-9
14 OE Select double-wide mode (1 line) ......... 8-25
15 OF Select condensed mode ................. 8-24
2.5 19 Cut sheet feeder mode ................ .8-10
32 20 Set intercharacter space ................
8-30
33 21 Master Select .........................
a22
3.5 23 Cancel MSB control ................... 811
36 24 Set absolute print position .............. a19
37 25 Select userdefinedset .................. a33
38 26 Define user-defined characters .......... .8-32
422A
Select graphics mode ................. ,835
43 2B Select n/Winch line spacing ........... 8-16
45 2D Turn underlining on/off ................ 8-29
47 2F Select vertical tab channel ............. .8-18
4830 Select l%iich line spacing ............. ais
SO 32 select l/&inch line spacing ............. a15
51 33 Select n/180-&h line spacing ........... a15
52 34 Select italic mode ..................... a31
53 3.5 Cancel italic mode .................... a32
5436 Enable printable characters ............. 8-33
5.5 37 Enable upper control codes ............. 834
58 3A Copy ROM to RAM .................. 8-33
60 3c
UnidirectionaJ mode (1 lime) ............ a9
61 3D SetMSBtoO. ........................ 8-11
62 3E Set MSB to
1 ......................... 8-11
63 3F Reassign graphics mode ...............
,836
6440 Initialize printer ....................... 8-8
65 41 Select
n/Winch line spacing ........... ,816
6642 Set vertical tabs .......................
a17
67 43 Set page length in lines .................
a13
67 43 Set page length in inches ...............
a13
6844 Set horizontal tabs .................... 821
69 4s Select emphasized mode ...............
,827
70 46 Cancel emphasized mode ...............
a27
7l 47 Select double-strike mode ..............
8-28
72 48 Cancel double-strike mode .............
8-28
74 4A
Perform n/W-inch line feed ............ 8-16
75 48
Select single-density graphics ........... ,834
76 4C Select double-density graphics ........... 834
77 4D
Select 12 cpi .......................... a23
78 4E Set skip over perforation ............... a14
79 4F Cancel skip over perforation ...........
,814
80 50
Sekt iocpi
..........................
a23
81 51 Set right margin .....................
.818
82 52 International character set .............. 832
83 53 Select superscript mode ................ 828
83 53 Select subscript mode .................. 828
84 54 Cancel superscript/subscript ............
8-29
ECg
ESCk
ESCI
ESCP
=cq
ESCr
Esct
Escw
ESC X
85.5
Unidirectional mode on/off .............
a10
87 57
Turn double-wide mode on/off .........
.a25
8959
Highspeed dbie-dkty ga~hic~ ........
a35
90 5A QuadrupJedensity graphics .............
a35
92 SC
Setrefativeprintposition..
.............
a20
97 61 select justification .....................
a30
98 62
Set vertical tabs in channels .............
a17
103 67
skt 15 cpi
.......................... a23
107 6B
Selecttypestylefamily .................
a22
108 6C
set left margin ........................
al8
112 70 Tim proportional mode on/off ..........
a24
113 n
Select character style .................. a29
114 72 Select printing color ...................
a27
116 74 Select character table ................. .8-31
119 77
Turn double-high mode on/off ..........
8-26
UO 78
&lect~terQuaJityordraft
............
a21
LQ-2550-10 24-Pin Printers