C.ITOH 1550S EP User manual

DOT MATRIX SERIAL IMPACT PRINTER
MODEL
1550S/SC EP
USERS MANUAL
<€P c. aTOH & co., LTD.
e.p.o. Box 136 Tokyo 100-91 Japan
U.S.A.:
C.ITOH ELECTRONICS, INC.
5301 Beethoven Street,
Los Angeles, Calif.
90066 U.S.A.
EUROPE:
C.ITOH ELECTRONICS CO.,
LTD.
Beacon House 26128
Worple Road, Wimbledon,
London SW19 4EE
United Kingdom
C. ITOH ELECTRONICS CORP.
Toho Seimei Bldg. 27th,
2-15-1 Shibuya, Shibuya-ku,
Tokyo
150 Japan
C.ITOH ELECTRONICS GmbH
RoBstraBe 96
4000 Dusseldorf 30
West Germany

Thank you for purchasing the model 1550S/SC EP.
"This equipment generates
and uses radio frequency energy and if not installed and us-
ed properly,
that is, in strict accordance with the manufacturer's instructions, may cause
interference to radio
and television reception. It has been type tested and found to com-
ply with-the limits for a Class B computing device in accordance with
the specifications
in Subpart J of Part ·15 of FCC Rules; which are designed to provide reasonable protec-
tionagainst 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 determined by turning the
equipment
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 clif-
ferent branch circuits
If necessary, the user should consult the dealer or an experienced radio/televisiontechni-
cian for additional suggestions.
The user may find the following booklet prepared by
the Federal Communications Commission helpful:
"Howto 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~'
Note:
In order to comply with the limits for a Class B computing device pursuant to Subpart
J of Part 15 of FCC Rules, please use the Shield cable for interfacing with the host com-
puter. (US. VERSION ONLY)
This equipment is manufactured
to comply with VDE-871/875. However there is no
guarantee that the fault
wave to other equipments will not occur in a paticular connection.
"All of the features and specifications are
subject to change without prior notice"

TABLE OF CONTENTS
Page
INTRODUCTION
................................................................ 1
1.1 Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. I
1.2 Printer Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.. 2
INSTALLATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.. 4
2.1 Unpacking Instmctions ................................................... 4
2.2 Ribbon Cassette Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.. 6
2.3 Paper Insertion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 7
2.3.1 Pin Feed (fan-folded paper) ......................................... 7
2.3.2 Friction Feed (roll paper and sheet paper)
.............................. 10
2.4
Use of the Paper Guide Separator (option) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 11
2.5 Print Position Adjustment ................................................. 12
2.6 Adjustment
of Gap between Dot Head and Platen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 13
2.7 Power Cord Connection ................................................... 13
OPERATION .................................................................... 14
3.1 Appearance and Nomenclature. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.. 14
3.2 Power Switch and Control Panel
............................................ 15
3.3 Operating Switches. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 16
3.3.1 SEL (Select) Switch
............................................... 16
3.3.2 LF (Line Feed) Switch
............................................. 16
3.3.3 TOF (Top
of Form) Switch ......................................... 16
3.4 Alert Switches
.......................................................... 16
3.4.1
PE (Paper Empty) Switch. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 16
3.4.2 Cover Interlock Switch. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.. 16
3.5 Indicator Lamps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.. 17
3.5.1 SEL Lamp (Green) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 17
3.5.2 PE Lamp (Red) .................................................. 17
3.5.3 Power on Lamp (Green) ............................................ 17
3.6 Other Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.. 17
3.6.1 Self-Test Function ................................................ 17
3.6.2 Print Start Conditions ............................................. 17
3.6.3 PE Over Ride Function ............................................ 18
3.6.4 Print Stop Function in Case of Emergency .............................. 18
3.6.5 Received Data Hexadecimal Print
Out Function ......................... 18
3.7 DIP Switches Setting
......................................... , ........... 19
3.8 Connecting the Interface Cable
............................................. 21
3.9 Specification of Parallel Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 23
3.10 Parallel Interface Timing Chart
.............................................. 23

3.11 Connector Pin Assignment and Descriptions .................................... 24
3.12 Print Modes
............................................................. 27
3.13 Control Codes for Printing
.................................... , ............. 27
3.14 List
of ESC Commands and Print Samples ...................................... 31
3.15 General Operating Notes ................................................... 40
-3.16 Periodic Maintenance ...................................................... 40
3.17 Print Paper Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . .. 43
3.17.1
FanfoldComputerForms ............................................ 43
3.17.2 Single Sheet Paper
........................................ , ........ 46
3.17.3 Roll Paper
....................................................... 47
APPENDIX 1 Specification of Color Print . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 48
ii

INTRODUCTION
MODEL l550S/SC EP PRINTER
1.1 Features
The l550S/SC EP
is a sophisticated compact dot matrix printer which can greatly enhance the printout
capability and control flexibility for your computer system.
It is designed for high compatibility, fast printing (180 characters per second).
A precision 9-wire print head will produce high resolution characters in a variety
of printing modes: 132
characters per line in the standard mode, 218 characters per line in the compressed mode, 66
or 109 double-
width characters per line in
the standard mode or compressed mode respectively.
Main features of the printer also include:
* Full 96 ASCII characters with descenders.
* Extended character sets of international languages.
* Subscript, superscript, and underline.
* Programmable graphics.
* Double-size characters.
* Double-strike (enhanced) printing.
* Extensive line feed control.
* Standard 2K buffer, optionally expandable.
* Hex Dump Function.
* SelfTest Function.
* Color print capability (M-1550SC EP only)
In the case
of an IBM PC (XT), or its equivalent, the printer is to be connected to the computer through
a printer adapter card
or through another adapter card which is good for connecting the printer and a
monochrome display
as well. The interface cable, in that case, should have a 25-pin D-shell connector on
its end toward
the computer and a 36-pin connector on its end toward the printer.
IBM is a trademark of International Business Machines Corp.
-1-

1.2 Printer Specifications
(1) Type
(2) PrintSpeed
(3) Print Direction
(4) Pin Number in Print Head
(5) Line Space
(6) Character Format
Dot Matrix
Double-size characters
Other characters
(ASCII, European, etc.)
Character Set
Print Characteristics
Extra Character Set
Graphics
(7) Character Pitch
Normal
Double Width
Compressed
Double Width-Compressed
Subscript
Superscript
Serial Impact Dot Matrix
180
CPS (Draft)
120 CPS (Normal)
Bidirectional with Logic Seek
9
1/6" (4.23mm) or programmable
(H xW)
2 types
Draft
12Xl2
9X12
Refer
to Figure 21, 22
Double-size characters
176-223, 244 and 245
No.1
Normal
12X8
9X8
Type
1: Draft
Type
2: Normal
Additional ASCII numbers from 160
to 175 for European
chars.; numbers from 176 to 223 for Graphic chars.; numbers
from 224
to 239 for selected Greek chars.; number from
240
to 255 for math. and extra symbols.
No.2
The differences between No.1 and No.2 are ASCII numbers 3,
4, 5, 6 and 21; ASCII numbers from 128 to 159 for European
chars
..
Including 50 block chars. and Programmable Graphics.
Characters Maximum number
per inch
of characters/line
10 132
5 66
16.5 218
8.25 109
10 132
10 132
-2-

(8) Media Handling
Paper Feed
(9)
(10)
(11)
(12)
Paper Width
Number
of Copies
Paper Loading
Interface
Inked Ribbon
Color
Type
Life Expectancy
Environmental Conditions
Operating Temperature
Operating Humidity
Power Requirement
Voltage
Power Consumption
(13) Dimensions and Weight
Height
Width
Depth
Weight
Sprocket pin feed and friction feed (Selectable)
4.25"
(l08mm) to 15" (38lmm)
Original plus two carbon copies (Total thickness must not
exceed 0.011" (0.28mm); Minimum paper thickness is 0.002"
(0.05mm)
From Rear-Top
8-bit Parallel
Black .
Cartridge
2 million characters
41 to 104°F (5 to 40°C)
10
to 85% RH non-condensing
115 VAC, 60Hz
220 V
AC, 50Hz
240 VAC, 50Hz
180 Wmax
5.7" (144.Smm)
21.7" (SSOmm)
12.4"
(3l4mm)
25 Alb (11.5kg)
-3-

2.1 Unpacking Instructions
Paper Guide Separator
(OPtion)
Aibbon Cassette
Side Pad
(L)
SECTION II
INSTALLATION
Paper Stand
.dI"""---TopPad
Power Supply Cord
Printer
Side Pad (A)
Outer Carton
Fig. 1 Unpacking (1)
-'-4-
1. After opening the outer carton,
take
out the top pad in which
the ribbon cassette, the power
supply cord and the paper stand
are packed. (The paper guide
separator is optional.)
2. Hold the left and right pads with
both hands and carefully draw
out
the printer from the outer carton.
3. Remove the left and right side pads
from the printer.

Packing Bag
Fig.2 Unpacking (2)
Filament Tapes
5. Carefully remove clear plastic pack-
ing bag from printer. (See Fig. 2.)
6. Remove the filament tapes.
7. Open the carrier cover.
Then remove the corrugated tube
that is provided to retain the head.
(See Fig. 3.)
Top Cover
Fig.3 Unpacking (3)
-5-

2.2 Ribbon Cassette Installation
To install the ribbon cassette
onthe printer, proceed as follows:
(1) . Open the carrier cover.
(2) Gently move the printer head carrier assembly to a position where no roller
is fitted on the roller
shaft.
(3) To install the ribbon cassette, turn the Cassette Drive Knob in the direction
of the arrow (clockwise)
to tension the ribbon. (See Fig. 4.) Holding the cassette, carefully insert the ribbon end between
the ribbon guide plate and ribbon guide, and push the
casset~e down on the ribbon deck. At this
time, align the two guide projections at the cassette bottom with the cassette guide
~oles. Make
sure that
th~ notches on both sides of the cassette are supported completely by the two cassette
supporters.
If not supported by the cassette supporters (the cassette is raised), push down on the
cassette while turning the ribbon drive gear clockwise. (See Fig. 5.)
After the Ribbon Cassette
is firmly in place, turn the Cassette Drive Knob in a clockwise direction
to make sure the Cassette Drive Gear and the Unit Ribbon Drive Gearare locked together properly.
Note: To ease the ribbon cassette installation, set the Gap Adjusting Lever to the Gap 4 position.
(Refer
to section 2.6)
Notch
Print Head
Cassette Supporter
Cassette Guide Holes
Cassette Drive Knob
Fig.4 Ribbon Cassette
Ribbon Drive Gear
Ribbon Deck
Fig. 5 Ribbon Deck
without Ribbon Cassette
-6-

2.3 Paper Insertion
2.3.1 Pin Feed (fan-folded paper)
(l) Open the paper cover.
(2) Open the paper cutter, and pull the roller shaft toward the front
of the printer.
(3) Pull the release lever toward the front. (See Fig. 6.)
Paper Cutter
Fig. 6 Paper Insertion (1)
(4) Lift the paper retainers on the left and right sprocket tractors.
Paper Retainer
Platen
Paper Cover
Sprocket Tractor
Fig. 7 Paper Insertion (2)
-7-
Paper
Paper Cover
Paper Retainer

(5) Fit the paper sprocket holes onto the right and left sprocket tractor pins. If the paper width ne-
cessitates adjusting the distance between the sprocket tractors, push back therightorleftsprocket
lever (allowing the sprocket tractor(s)
to move freely) and move the sprocket tractor(s) right or
left
~ needed to match paper width. Then pull the sprocket lever(s) forward to lock the position
of the sprocket tractor(s). (Refer to Fig. 8.)
Sprocket Lever
Paper Retainer
Fig.8 Paper Insertion (3)
(6) Now push down the paper retainer of the sprocket tractors. Turn the platen knob clockwise,
bringing the paper
to the front side of the platen. Return the roller shaft to hold the paperagainst
the platen and the Release lever
to the rear for pin feed operation. (See Fig. 9.)
Platen Knob
Fig. 9 Paper Insertion (4)
-8-

(7) How to install paper stand.
Install the paper stand
as shown below.
•
t
Fig. 10 Paper Insertion (5)
(8) Positions of Bail Rollers.
When inserting paper, set
the bail rollers as shown below.
~
-----
0 0
0 0
0 0
~ E!!'!!!!
-'"
0
~
~
--
0
0 0
0 0
~
-
--
0..-
A A
2XA
A A
L
Fig. 11 Positions of Bail Rollers
L =Paper width
Example: L IS
In case of IS-inch paper: A =6= (5 =2.5 inches (63.5 mm)
-9-

2.3.2 Friction Feed (ron paperand sheet paper)
(1) Open the print cover, and pull the roller shaft toward the front of the printer.
(2) Move the print head carrier assembly
to the left side of the printer.
(3) Push the release lever
to the rear of the printer.
(4) Insert the paper
into the paper inlet on the paper cover (behind the pal;>er cover for roll paper).
When the paper end appears on the platen, set the paper properly, pull the release lever toward
the front
(to the "friction feed" position), and reposition the roller shaft and print cover. (See
Fig. 12.)
Paper End
Paper
Roll Paper Inlet
"7""-+-_ Paper Cutter
Release Lever
·+------""~rv/
Fig. 12 Friction Feed Set-up
-10-

2.4 Use of the Paper Guide Separator (option)
Install the optional paper guide separator on the printer
as follows:
(I) Insert the legs of the paper guide separator into the square hol~s on the rear of the printer top
cover.
'idJ._-- Paper Guide Separator (Option)
~Topcover
Notes:
• Connect the ground wire from the paper guide separator
as follows:
Remove the screw at top left
of the power supply unit plate, pass the screw through the hole at
the end
of the ground wire, and reposition and tighten the screw together with the ground wire.
Do not remove these two screws.
• To remove the paper guide separator from the printer, pull the ground wire on its paper guide
separator side.
Fig. 13 Mounting the Paper Guide Separator
-11-

(2) Pass thepaperthrough thepaper guide separator, andinto the printer. (See 2.3 "Paper Insertion".)
When the paper end comes on the platen, draw it over the top of the paper guide separator, and
drop it
from the rear. (See Fig. 14.)
Paper Guide Separator
Platen Knob
Fig. 14 Example of Paper Guide Separator Application
2.S Print Position Adjustment
After the paper is properly installed, tum the platen knob clockwise to adjust the print position.
-12-

2.6 Adjustment of Gap between Dot Head and Platen
The gap between the Print head and the platen
is adjustable in 4 steps.
(a) When
the gap adjusting lever is moved fully counterclockwise, the gap between the Print head
and the platen will be narrowed to the limit. The lever
is usually set at this position when a
single sheet paper
is used.
(b) To obtain high printing quality, move the gap adjusting lever to adjust the gap.
Platen
Print Head
Platen-to-head gap with gap
adjusting lever pushed fully
to rear.
'-----Gap 1
(Single paper)
Fig. 15 Gap Adjustment between
Dot Head and Platen
2.7 Power Cord Connection
Connect the attached power cord to the printer, and insert the plug into the
AC outlet.
-13-

3.1 Appearance
and
Nomenclature
Paper
Cutter
Top
Cover.
Release Lever
-I---~-i."
Power Switch
Carrier Cover
(B)
SECTION III
OPERATION
Fig.
16 Front Exterior View
Platen Knob
/'o.---Carrier
Cover
(B)
~~~"'--_
Front
Control Panel
Bottom
enclosure
Paper Cover
Paper Inlet
Fuse
Interface Connector
Fig.
17
Rear
Exterior View
-14-

3.2 Power Switch and Control Panel
(1 ) Power Switch
The power ON-OFF switch
is located on the
left side
of the printer.
Its • mark side should be pushed to turn it
ON.
(2) Control Panel
Power Switch
(ON)
Fig. 18 Power Switch
The control panel is located at the right front of the printer. As shown in Fig. 19, the panel has 3
push switches, 2 green LEDs, and one red LED.
POWeR P.E SEL L.F TOF
LED (green) Push Switches
LED (red)
Fig.
19 Control Panel
-15-

3.3 Operating Switches
The 3 operating switches are
of the push type and are located in the right hand section of the control
panel.
3.3.1 SEL (Select) Switch
(a) SELECT and DESELECI' states alternate with every push.
(b) When power is applied, the printer will become SELECT.
Data transmission and printing
of data in the DATA BUFFER can be stopped temporarily. To
perfonn this operation, press the SEL switch with the LF switch already depressed. To resume
printing and data transmission, press the SEL switch.
3.3.2 LF (Line Feed) Switch
(a) One line feed occurs with every push.
(b)
When the switch is kept depressed, paper is fed one line as far as 4 lines. Thereafter, continuous
forward line feed takes place until the switch
is turned off.
(c) Line feed can be performed only when the printer
is in a DESELECT state.
3.3.3 TOF (Top
of Form) Switch
(a) When this switch
is pressed, the paper feeds to the next TOF position.
(b) TOF can be performed only when the printer
is in a DESELECT state.
(c) Paper advance
is done only once even if this switch is kept depressed.
3.4 Alert Switches
3.4.1 PE (Paper Empty) Switch
(a) This
is a microswitch located near the bottom of paper feed platen which detects the end of
paper or absence of paper.
(b) When the
end of paper is detected, printing is stopped. When the SEL switch is pressed to con-
tinue printing, the printer prits one line and then stops.
Upon detection
of paper empty by this switch, the PE lamp lights, and the printer is deselected.
The printer
is deselected immediately when the printer power is turned on or if PE status has
been detected when an INPUT PRIME is entered.
3.4~2 Cover Interlock Switch
(a) This
is an interlock switch which detects that the top cover is opened.
(b) Upon detection
of cover opening during printing, the printer automatically stops and is deselect-
ed ·after printing one line. If not during printing, the printer is immediately deselected.
(c) To select the printer again, it
is necessary that the SEL switch is depressed after closing the top
cover.
-16-