Epson A794-D100 User Manual
A794 Thermal Receipt Printer
Owner's Guide
A794-D100
TM
Legal Notices
Disclaimer
Information in this document is s u bject to change wi thout notice. Consul t your Axiohm sal es
representative for information that is applicable and current. Axiohm reserves the right to
improve products as new technology, components, software, and firmware become available.
No part of this document may be reproduced or transmitted in any form or by any means,
electronic or mechanical, for any purpose without the express written permission of Axiohm.
Copyright
Copyright © 1999 by AXIOHM
Ithaca, New York USA
All rights reserved
Printed in USA
Confidential, Unpublished
Property of AXIOHM
Trademarks
AXIOHM is a trademark. Other trademarks and registered trademarks are the property of their
respective holders.
Federal Communications Commission (FCC)
Radio Frequency Interference Statement
Warning
Changes or modifications to this unit not expressly approved by the party responsible for
compliance could void the user’s authority to operate the equipment.
Note
This equipment has been tested and found to comply with the limits for a Class A digital device,
pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection
against harmful interference when the equipment is operated in a commercial environment. This
equipment generates, uses, and can radiate radio frequency energy and, if not installed and used
in accordance with the instruction manual, may cause harmful interference to radio
communications. Operation of this equipment in a residential a r ea is likely to cause harmful
interference in which case the user will be required to correct the interference at his own expense.
Information to the User
This equipment must be installed and used in strict accordance with the manufacturer's
instructions. However, there is no guarantee that interference to radio communications will not
occur in a particular commercial installation. If this equipment does cause interference, which can
be determined by turning the equipment off and on, the user is encouraged to contact Axiohm
immediately.
Axiohm is not responsible for any radio or television interference caused by unauthorized
modification of this equipment or the substitution or a ttachment of connecti ng cables and
equipment other than those specified by Axiohm. The correction of interferences caused by such
unauthorized modification, substitution or attachment will be the responsibility of the user.
March 1999 i
In order to ensure compliance with the Product Safety, FCC and CE marking requirements, you
must use the power supply, power cord, and interface cable which were shipped with this
product or which meet the following parameters:
Power Supply
UL Listed (QQGQ), Class 2 power supply with SELV (Secondary Extra Low Voltage), non-energy
hazard output, limited energy source, input rated 100-240 Vac, 1.5/0.8 A, 50/60 Hz, output rated
24 Vdc, 2.3 A.
Use of this product with a power supply other than the Axiohm power supply will require you to
test the power supply and Axiohm printer for FCC and CE mark certification.
Communication Interface Cable
A shielded (360-degree) interface cable must be used with this product. The shield must be
connected to the frame or earth ground connection or earth ground reference at EACH end of the
cable.
Use of a cable other than described here will require that you test the cable with the Axiohm
printer and your system for FCC and CE mark certification.
Power Cord
A UL listed, detachable power cord must be used. For applications where the power supply
module may be mounted on the floor, a power cord with Type SJT marking must be used. For
applications outside the US, power cords that meet the particular country’s certification and
application requirements should be used.
Use of a power cord other than described here may result in a violation of safety certifications
that are in force in the country of use.
Industry Canada (IC)
Radio Frequency Interference Statement
This Class A digital apparatus meets all requirements of the Canadian Interference-Causing
Equipment Regulations.
Cet appareil numérique de la classe A respecte toutes les exigences du Règl ement sur le matériel brouilleur
du Canada.
March 1999ii
A794 Owner’s Guide Contents
Contents
Chapter 1: About the Printer..............................................................1
Description of Printer ....................................................................2
Models Available ...........................................................................3
Model Identification ...............................................................3
Communication Interfaces.....................................................3
Installations.....................................................................................4
On a Flat Surface.....................................................................4
On a Wall (with optional wall-mount kit A794-K260).......4
On a Flat Surface Vertically (see note) .................................5
Features ...........................................................................................5
Options ............................................................................................6
Chapter 2: Using the Printer...............................................................7
Printer Controls..............................................................................8
Changing Paper..............................................................................10
Testing the Printer ..........................................................................13
Troubleshooting the Printer..........................................................15
Printer Tone and Green LED.................................................15
Printing Problems ...................................................................16
Printer Does Not Work...........................................................16
Chapter 3: Media and Supplies Guide.............................................17
Ordering Thermal Paper...............................................................18
Thermal Paper Specifications................................................18
Manufacturers .........................................................................18
How to Order...........................................................................18
Ordering Miscellaneous Supplies................................................19
Ordering Cash Drawers.........................................................19
Ordering Power Supply and Power Cord...........................19
Ordering Communication Cables.........................................20
Wall-Mount Kit........................................................................20
Chapter 4: Print Specifications..........................................................21
Characters........................................................................................22
Print Modes..............................................................................22
Size............................................................................................22
Paper Specifications.......................................................................23
Print Zones......................................................................................23
Print Zones for 80 mm Paper.................................................23
Print Zones for 82.5 mm Paper..............................................2 4
Character Sets.................................................................................25
Code Page 437 .........................................................................25
Code Page 850 .........................................................................26
Code Page 852 .........................................................................27
Code Page 858 .........................................................................28
Code Page 860 .........................................................................29
Code Page 863 .........................................................................30
Code Page 865 .........................................................................31
Code Page 866 .........................................................................32
March 1999
iii
Contents A794 Owner’s Guide
Chapter 5: Communication Interface................................................33
Communication Overview............................................................34
Interface....................................................................................34
Sending Commands................................................................34
RS-232C Interface...........................................................................35
Print Speed and Timing..........................................................35
XON/XOFF Protocol..............................................................36
DTR/DSR Protocol..................................................................36
RS-232C Technical Specifications..........................................37
Parallel Interface.............................................................................39
Chapter 6: Programming Information..............................................41
List of Commands..........................................................................42
Comparisons...................................................................................45
Command Descriptions.................................................................46
Command Conventions..........................................................46
Printer Function Commands .................................................47
Vertical Positioning and Print Commands..........................55
Horizontal Positioning Commands ......................................60
Print Characteristics Commands...........................................68
Graphics Commands..............................................................79
Printer Status Commands......................................................87
Real Time Commands ............................................................100
Bar Code Commands..............................................................108
Page Mode Commands..........................................................112
Macro Commands...................................................................120
Flash Download Commands.................................................122
Index.................................................................................................129
iv
March 1999
Chapter 1: About the Printer
♦ Description of Printer
♦ Models Available
Model Identification
Communication Interfaces
♦ Installations
On a Flat Surface
On a Wall
On a Flat Surface Vertically
♦ Features
♦ Options
Chapter 1: About the Printer A794 Owner’s Guide
Description of Printer
The A794 thermal receipt printer is extremely fast, quiet, and very reliable. With
thermal printing technology, there is no ribbon cassette to change, and paper loading is
extremely simple. The printer is small enough to fit almost anywhere and is easy to use
with the receipt exiting from the top. There is no journal as it is kept electronically by
the host system.
March 19992
A794 Owner’s Guide Chapter 1: About the Printer
Models Available
There are several models of the printer depending on the communication interface and
the combination of options selected.
Model Identification
See the illustration for the features designated by the printer ID number.
A794 Model ID Key
A 7 9 4 - X X X X
1 = no knife
5 = knife
0 = standard character sets
n = other expanded language versions
1 = light gray case
2 = dark gray case
2 = 80.0 mm, 512K Flash
3 = 82.5 mm, 512K Flash
5 = 80.0 mm, 1MB Flash
6 = 82.5 mm, 1MB Flash
Communication Interfaces
♦ RS-232C Serial Interface
♦ IEEE 1284 Bi-Directional Parallel
March 1999 3
Chapter 1: About the Printer A794 Owner’s Guide
Installations
You can set up the printer three ways: set it flat on any level surface, mount it vertically
on any level surface, or mount it on a wall using a wall-mount kit. Either way, be sure to
leave room to open the cover and access the cables.
For more information about See this document
Setting up the printer A794 Setup Guide
On a Flat Surface
On a Wall (with optional wall-mount kit A794-K260)
March 19994
A794 Owner’s Guide Chapter 1: About the Printer
Note: Clearance must
On a Flat Surface Vertically (see no t e)
be provided for the
cords at the rear of the
printer.
Features
Interfaces
Memory/Firmware
Resident Character
Sets
Integrated Bar Codes
Print
Print Resolution
Speed
Human Interface
Cash Drawer Driver
RS-232C, Parallel
512K Flash Memory, History EEROM, 4K Buffer (see “Options”
for additional memory)
PC Code Page 437 (US), PC Code Page 850 (Multilingual), PC
Code Page 852; Code Pages 865, 858, 860, 863, and 866
Code 39, UPC-A, UPC-E, JAN8 (EAN), JAN13 (EAN), Interleaved
2 of 5, Codabar, Code 128, EAN 128, PDF-417 (two-dimensional)
Host-selectable 44 or 56 columns of print on 80 mm wide thermal
paper
8 dots/mm
Up to 130 mm/second throughput
Speaker for software-generated tone, drop-in paper loading,
configuration menu for easy configuration
Connector for one or two cash d rawers (use Y cord for two
drawers)
March 1999 5
Chapter 1: About the Printer A794 Owner’s Guide
Options
♦ Knife (Cutter)
♦ Wall Mount
♦ Power Supply: 55 Watt/75 Watt
♦ Power Cords: US, SEV, UK AC Cord, and Australia AC Cord
♦ 1MB memory
♦ Paper Low Sensor
♦ Paper Width
♦ 82.5 mm
♦ 80 mm
♦ Interface Boards
♦ RS 232C
♦ IEEE Bi-Directional Parallel
March 19996
Chapter 2: Using the Printer
♦ Printer Controls
♦ Changing Paper
♦ Testing the Printer
Chapter 2: Using the Printer A794 Owner’s Guide
Printer Controls
LED (Green)
Paper Feed
Reset
Button
Button
Reset Button
Use the Reset Button to reset the printer in case of a jam or fault condition. When the
Reset Button is pressed, the printer goes through a startup routine as if it had been
turned off, then on again.
Paper Feed Button
Use the Paper Feed Button to advance the paper.
Use the Reset Button with the Paper Feed Button to print the test printout. To configure
the printer, set DIP switch 1 in the down (On) position and use the Reset Button with
the Paper Feed Button. Make sure to reset DIP switch 1 to the up (Off) position, when
you are done configuring the printer.
LED
The green LED shows the printer status by shining or flashing.
Status LED
Paper Is Low Flashes Slowly
Paper Is Out Flashes Quickly
Knife Jam Flashes Quickly then Slowly
March 19998
A794 Owner’s Guide Chapter 2: Using the Printer
Tone
A single beep indicates the printer has successfully completed its startup routine (after
having been reset or the power supply turned on).
If the printer beeps twice, a problem may be indicated.
For more information about See these sections
Paper Feed Button “Testing the Printer”
“Configuring the Printer”
Reset Button “Troubleshooting the Printer”
“Testing the Printer”
“Configuring the Printer”
LED “Troubleshooting the Printer”
Tone “Troubleshooting the Printer”
March 1999 9
Chapter 2: Using the Printer A794 Owner’s Guide
Changing Paper
Change the paper when either of the following conditions occurs:
♦ Colored stripe appears on the receipt paper indicating the paper is low
Change the paper as soon as possible to avoid running out of paper part way
through a transaction.
♦ Green LED flashes (slow flash) indicating the paper is low
Change the paper as soon as possible to avoid running out of paper part way
through a transaction.
♦ Green LED flashes (quick flash) indicating the paper is out
Change the paper immediately or data may be lost.
Caution: Do not operate the printer or host computer if the printer runs out of paper. The printer
will not operate without paper, but it may continue to accept data from the host
computer. Because the printer cannot print any transactions, the data may be lost.
1. Open the cover.
March 199910
A794 Owner’s Guide Chapter 2: Using the Printer
2. Remove the used roll.
3. Tear off the end of the new roll so that the edge is loose.
March 1999 11
Chapter 2: Using the Printer A794 Owner’s Guide
4. Place the new roll into the paper bucket with a few inches of paper extending over
the cabinet front (or top, if printer is mounted vertically).
Caution:Be sure the paper unrolls from the bottom of the roll. Otherwise, the printer will not
print or the paper will jam.
5. Close the cover and remove the excess paper by tearing it against the tear-off blade.
6. Advance the paper if necessary by pressing the Paper Feed Button.
Note:In the event of a paper jam, remove the roll, tear a new clean edge, and replace it in the
paper bucket. Be sure that the paper unrolls from the bottom of the roll.
For more information about See this section
Paper jams “Troubleshooting the Printer”
March 199912
A794 Owner’s Guide Chapter 2: Using the Printer
Testing the Printer
Run this test to check the printer. The test prints the settings for several functions, and
partially cuts the paper between each variation.
The printouts may vary depending on the model. The test ends with a partial cut of the
paper, then begins again. Several feet of paper can be used to print one pass of the test.
Reset
Button
Paper Feed
Button
1. To start the test, press the Paper Feed Button and Reset Button at the same time.
The printer begins printing the data and character sets until you stop the test. This
can be given to a service representative if it appears there is a problem. See the
sample test printout on the following page.
(Another way to run the test is to press the paper feed button and then open and
close the cover.)
2. To stop the test, press the Paper Feed Button.
March 1999 13
Chapter 2: Using the Printer A794 Owner’s Guide
For more information about See this section
Poorly printed test printout “Troubleshooting the Printer ”
March 199914
A794 Owner’s Guide Chapter 2: Using the Printer
Troubleshooting the Printer
The printer is simple and generally trouble-free, but from time to time minor problems
may occur. Follow these procedures to determine the cause and resolution of any
problems the printer may be having. If the procedures in this section do not correct the
problem, contact a service representative.
For more information about See this section
Detailed and technical troubleshooting “Service L e v el Troubleshooting”
in the A794 Service Guide
Printer Tone and Green LED
Problem Possible Causes What to Do Where to Go
Green LED, quick
continuous flashing.
Green LED, slow
continuous flashing.
Printer beeps (twotone—low frequency,
high frequency).
Printer beeps and flashes
green LED in various
combinations.
Paper out.
Cover off.
Knife unable to home.
Paper is low
(if Paper Low Sensor is
installed).
Other problems may be
indicated.
Printer has been turned
on and is ready to
operate.
These all indicate serious
problems.
Put in a new paper roll.
Put the cover on.
Contact your authorized
service representative.
Put in a new paper roll.
Contact your authorized
service representative.
No action is required.
Contact your authorized
service representative.
A794 Owner’s Guide
Contact your authorized
service representative.
A794 Owner’s Guide
March 1999 15
Chapter 2: Using the Printer A794 Owner’s Guide
Printing Problems
Problem Possible Causes What to Do Where to Go
Colored stripe on the
receipt.
Receipt does not come
out all the way.
Printer starts to print,
but stops while the
receipt is being printed.
Receipt is not cut. Paper is jammed.
Paper is low. Change the paper. A794 Owner’s Guide
Paper is jammed. Open the receipt cover,
inspect the knife, and
clear any jammed paper.
Paper is jammed. Open the receipt cover,
inspect the knife, and
clear any jammed paper.
Open the receipt cover,
inspect the knife, and
clear any jammed paper.
The printer is not
configured for a knife.
Print is light or spotty. Paper roll loaded
incorrectly.
Thermal printhead is
dirty.
Vertical column of print
is missing.
One side of receipt is
missing.
This indicates a serious
problem with the printer
electronics.
This indicates a serious
problem with the printer
electronics.
Contact your authorized
service representative.
Check that the paper is
loaded properly.
Use recommended
thermal receipt paper.
Contact your authorized
service representative.
Contact your authorized
service representative.
A794 Owner’s Guide
A794 Media and Supplies
Guide
Printer Does Not Work
Problem Possible Causes What to Do Where to Go
Printer Does Not
Function When Turned
On.
Printer not plugged in. Check that printer cables
are properly connected on
both ends.
A794 Setup Guide
Receipt cover not fully
closed.
Check that the host or
power supply is getting
power.
Close and latch the
receipt cover.
March 199916
A794 Setup Guide
Chapter 3: Media and Supplies Guide
♦ Ordering Thermal Paper
Thermal Paper Specifications
Manufacturers
How to Order
♦ Ordering Miscellaneous Supplies
Ordering Cash Drawers
Ordering Power Supply and Power Cord
Ordering Communication Cables
Wall-Mount Kit
Chapter 3: Media and Supplies Guide A794 Owner’s Guide
Ordering Thermal Paper
Thermal Paper Specifications
The printer requires qualified thermal paper with the following dimensions:
Width Diameter Length
80 mm ± .2 mm (3.15 in. ± .02 in.) 90 mm max. (3.27 in.) 322 ft. nominal.
82.5 mm ± .2 mm (3.25 in. ± .02 in.) 90 mm max. (3.27 in.) 322 ft. nominal.
The paper must not be attached at the core. Use paper with a colored stripe at the end
to indicate that the paper is running low.
Manufacturers
Axiohm recommends the following paper grades produced by their respective
manufacturers. There are a number of paper converters qualified to provide this paper,
provided the POS rolls are from these recommended grades.
How to Order
Manufacturers Phone Paper Grade (Density)
Kanzaki Specialty Papers
(USA)
Appleton Papers, Inc. (USA)
Arjo-Wiggins Thermal Papers,
Ltd. (UK)
Kanzan Spezialpapiere GMBH
(Germany)
Nippon Paper Co., Ltd. ,
Business Communications
Paper Div. (Japan)
Oji Paper Co., Ltd. (Japan)
Additional grades are qualified and available for special media requirements
To order paper rolls, contact your converter of choice. Axiohm can provide the
following paper in small lots to facilitate product evaluation and testing. To order
directly from Axiohm, use the following part numbers:
Voice: 888-526-9254
Fax: 413-731-8864
Voice: 800-922-1729
Fax: 800-922-1712
Voice: 44 1222-422-422
Fax: 44 1222-422-402
Voice: 49 2421 5924 0
Fax: 49 2421 5924 29
Voice: 81-3-3218-8000 TP50 KS (Standard)
Voice: 81-3-5467-1086
Fax: 81-3-5467-6678
P-310 (Standard)
P-300 (Light)
P-350 (Light)
Optima T1012A (Standard)
Optima POS and T1030 (Light)
Sensa 522/60 (Standard)
Sensa 662/60 (Light)
KF60 (Standard)
KF50 (Light)
KF60 (Standard)
KF50 (Light)
♦ Standard Density 50 Rolls Axiohm #A152-002
♦ Light Density 50 Rolls Axiohm #A152-003
March 199918
A794 Owner’s Guide Chapter 3: Media and Supplies Guide
Ordering Miscellaneous Supplies
Ordering Cash Drawers
Order cash drawers from the following suppliers:
Cash Drawers Number
NCR 7052-K657
M-S Cash Drawer Corp. EP-125 K series, EP-127, EP-102
APG Cash Drawer Model 322
Indiana Cash Drawer Model SLD
Ordering Power Supply and Power Cord
Contact your sales representative to order the power supply and power cords listed in
the table. The numbers are for reference only. Suppliers may use other numbers.
Item Type Number
Power supply with attached cable to
printer and U.S. power supply cord
Power supply, attached cable A794-K301
Power supply cord (to outlet) United States
International (no plug)
United Kingdom
S.E.V.
Australia
International (with plug)
A794-K330
A794-K320
A794-K321
A794-K322
A794-K323
A794-K324
A794-K326
March 1999 19
Chapter 3: Media and Supplies Guide A794 Owner’s Guide
Ordering Communication Cables
Contact your sales representative to order the communication cables listed in the table.
The numbers are for reference only. Suppliers may use other numbers.
Communication Cables Length Order Number
RS-232C 25-pin (host) to 9-pin (3 meters—9.8 ft.) A141-0008
RS-232C 9-pin to 9-pin (3 meters—9.8 ft.) A141-0007
Parallel 25-pin to 25-pin (3 meters—9.8 ft.) A141-0009
Wall-Mount Kit
Contact your sales representative to order the wall-mount kit.
Printer wall-mount kit: A794-K260
March 199920
Chapter 4: Print Specifications
♦ Characters
Print Modes
Size
♦ Paper Specifications
♦ Print Zones
Print Zones for 80 mm Paper
Print Zones for 82.5 mm Paper
♦ Character Sets
Code Page 437
Code Page 850
Code Page 852
Code Page 858
Code Page 860
Code Page 863
Code Page 865
Code Page 866
Chapter 4: Print Specifications A794 Owner’s Guide
Characters
Print Modes
Here are the available print modes.
♦ Standard
♦ Compressed
♦ Double High
♦ Double Wide
♦ Upside Down
♦ Rotated
♦ Underlined
♦ Bold
♦ Reverse
♦ Italic
Size
♦ Scaled
Here are the sizes of the characters for the Standard and Compressed mode.
Standard
♦ Characters per Inch: 15.6
♦ Characters per Line: 44
♦ Cell Size: 13 x 24 Dots
Compressed
♦ Characters per Inch: 20.3
♦ Characters per Line: 56
♦ Cell Size: 10 x 24 Dots
For more information about See this section
Programming the printer to
print the various print modes
“Programming Information”
March 199922
A794 Owner’s Guide Chapter 4: Print Specifications
Paper Specifications
The printer requires qualified thermal thermal paper with the following dimensions:
Width Diameter Length
80 mm ± .2 mm (3.15 in. ± .02 in.) 90 mm max. (3.27 in.) 322 ft. nominal.
82.5 mm ± .2 mm (3.25 in. ± .02 in.) 90 mm max. (3.27 in.) 322 ft. nominal.
The paper must not be attached at the core. Use paper with a colored stripe at the end
to indicate that the paper is running low.
Print Zones
Print Zones for 80 mm Paper
Here are the specifications of the print zone for 80 mm paper:
♦ 576 dots (addressable) @ 8 dots/mm, centered on 80 mm
♦ Standard mode: minimum margins: 2.5 mm (.098 inches)
♦ Top margin to manual tearoff: 17.8 mm (0.70 inches)
♦ Top margin to knife cut: 19.0 mm (0.75 inches)
Paper Width = 80 mm (3.15 in.)
Printable Zone, 576 Dots = 72 mm (2.835 in.)
Nominal Margins, 4 mm (0.157 in.)
Cut Edge
Top Margin, 17.8 mm (.70 in.) Minimum
44 Standard Columns = 71.5 mm (2.815 in.)
56 Compressed Columns = 70 mm (2.756 in.)
Cut Edge
March 1999 23
Chapter 4: Print Specifications A794 Owner’s Guide
When printing
graphics or logos,
converted from 6
dot/mm to 8
dot/mm, the
printable zone is
expanded to 598
dots.
Print Zones for 82.5 mm Paper
Here are the specifications of the print zone for 82.5 mm paper:
♦ 640 dots (addressable) @ 8 dots/mm, centered on 82.5 mm
♦ Standard mode: minimum margins: 1.0 mm (0.040 inches)
♦ Top margin to manual tearoff: 17.8 mm (0.70 inches)
♦ Top margin to knife cut: 19.0 mm (0.75 inches)
Printable Zone, 640 Dots = 80 mm (3.15 in.)
Nominal Margins (2) = 1.25 mm (0.05 in.)
Paper Width = 82.5 mm (3.25 in.)
Cut Edge
Top Margin, 17.8 mm (.70 in.) Minimum
Cut Edge
48 Standard Columns = 78.0 mm (3.07 in.)
62 Compressed Columns = 77.5 mm (3.05 in.)
March 1999 24
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