
ML5790eco/ML5791eco Specifications
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High duty, high quality 24-pin dot matrix
printers with truly versatile paper handling
Improve the presentation of multi-part
documents with scalable fonts and high print
quality
The ultra reliable ML5790eco and wide carriage
ML5791eco dot matrix printers deliver fast,
high quality printing of multi-part forms, truly
versatile paper handling and low running costs.
Their high 576 characters per second (cps) print
speeds, fast throughput and ability to manage
heavy medias make them perfect for high duty
applications where presentation and print quality
are essential. And with multiple emulations,
replacing slow or failed printers is simple and
straightforward.
Ideal for printing customer facing documents
such as receipts, invoices, dispatch notes and
spreadsheets, on single or multipart paper, the
ML5790/1eco will keep productivity levels high
and document presentation professional.
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Impressive 576cps print speeds
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24-pin print head delivers sharp, detailed text
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Epson LQ, IBM PPR and IBM AGM compatibility
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Resident scalable fonts improve presentation
and speed
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Simple ‘Clean hands’ ribbon changing
Versatile and easy to use
The ML5790/1eco printers can feed both cut
sheet paper and continuous forms with ease.
Front, top, bottom and rear paper input paths and
an on-board tractor feed unit that can be front
or rear mounted provide truly versatile paper
handling. A long life 24-pin print head delivers
superb quality documents on single or multi-part
paper printing up to 6 copies simultaneously.
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Four paper paths handle cut-sheet paper and
continuous forms
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Print single or multi-part papers up to 6 copies
Optional push and pull tractor feed units are
available to allow the loading of two different
media types simultaneously or the feeding of
heavier papers and labels. A Roll Paper Stand
option is available for the ML5790eco for
economical printing of passenger lists, call logs,
data logs etc.
Save money and help the environment
Equipped with long life ribbons and a power
saving 1.5W “Sleep mode” the ML5790/1eco
printers will keep running costs and energy
consumption to the minimum, as well as reducing
your carbon footprint.
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Long life ribbons keep running costs low (8
million characters ML5790eco, 13 million
characters ML5791eco)
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Eco-friendly technology, “Sleep mode”
consumes just 1.5W
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Manufactured at a CarbonZero rated facility
OKI’s commitment to our customers
The OKI brand is one of proven reliability and
value. With almost half a century of experience in
the impact printer industry, you are guaranteed
proven reliability, best-in-class performance and
great value for money products. And, for total
peace of mind, just register your printer and take
advantage of our extended three year on-site
warranty at no extra cost.
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Operates in the most challenging
environments
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Long life 400 million character print head
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Mean Time Between Failure (MTBF) figure of
25,000 hours
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Three year on-site warranty as standard for
total peace of mind
Variants available:
ML5790eco
Narrow carriage
ML5791eco
Wide carriage

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ML5790eco/ML5791eco - Dot Matrix Printers
Printer
Number of pins
Columns
Character pitch
Graphics resolution
Print speed
Interface and Software
Interfaces
Optional interfaces
Emulations
Typeface & font
Typestyle
Barcode fonts
Printer driver
Utilities
Paper Handling
Paper
24
ML5790eco: 80 (10cpi); 160 (maximum in compression mode)
ML5791eco: 136 (10cpi); 272 (maximum in compression mode)
5/6/7.5/8.5/10/12/15/17.1/20 pitch and proportional
Up to 360 x 360 dpi
High Speed Draft: 576cps (12cpi); High Speed Draft: 480cps
(10cpi); Draft: 540cps (15cpi); Draft: 432cps (12cpi); Draft:
360cps (10/20cpi); Draft: 309cps (17.1cpi); Letter Quality:
240cps (20cpi); Letter Quality: 206cps (17.1cpi); Letter Quality:
180cps (15cpi); Letter Quality: 144cps (12cpi); Letter Quality:
120cps (10cpi)
IEEE 1284 parallel interface, USB 2.0 (full speed)
Ethernet 10/100, Serial RS232C
Epson LQ ESC/P2, IBM PPR, IBM AGM
HSD, Draft, Courier (scalable), Roman (scalable), Swiss
(scalable), Swiss Bold, Orator, Gothic, Prestige, OCR-A, OCR-B
Emphasised, Enhanced, Double Width, Double Height, Italics,
Outline, Shadow, Superscript, Subscript, Underline
UPC-A, UPC-E, EAN8, EAN13, Code39, Interleaved 2of5,
Code128 (A/B/C), CODABAR (NW-7), POSTNET, Industrial 2of5,
Matrix 2of5
Windows 2000 / XP (32-bit & 64-bit) / Vista (32-bit & 64-bit) /
1
7 (32-bit & 64-bit) / Server 2003 (32-bit & 64-bit) /
Server 2008 (32-bit & 64-bit) / Server 2008 R2 (64-bit)
Status monitor, Button setup utility, Menu setup utility,
TOF setup utility, Network setup utility, LPR utility
Cut Sheet (single sheet), Continuous Paper (single-part,
multi-part), Roll paper (ML5790eco only), Envelope, Card,
Label (cut sheet and fan fold)
General Features
Input buffer
Power supply
Power consumption
128Kbytes
Single phase 220 to 240VAC, +/- 10%
ISO/IEC 10561 Letter, Roman, Range1: 52W;
Sleep mode: 1.5W (with no optional attachments)
Noise level Normal: 57dB(A); Quiet: 52dB(A); Silent mode: 49dB(A)
Dimensions (HxWxD)
ML5790eco: 191 x 438 x 375mm;
ML5791eco: 191 x 592 x 375mm
Weight ML5790eco: 7.5kg approx; ML5791eco: 10kg approx
Print Head life
Reliability
Warranty
400 million characters
MTBF: 25,000 hours
3 years extended warranty upon registration within
30 days of purchase
Product order numbers ML5790eco: 01293101; ML5791eco: 01293201
Accessories (Order Numbers)
Single Bin Cut Sheet Feeder ML5790eco: 44497402; ML5791eco: 44497502
Push Tractor
(front/rear feeds)
ML5790eco: 44454902; ML5791eco: 44455002
Pull Tractor (bottom feed) ML5720eco: 44753902; ML5721eco: 44754002
Roll Paper Stand
Serial RS232C
Network Card
09002332 (ML5790eco)
44455102
44455302
Consumables (Order Numbers)
Ribbon
(8 million characters)
(13 million characters)
44173405 (ML5790eco)
Ribbon
44173406 (ML5791eco)
Continuous paper (width) ML5790eco: 76.2 - 254.0mm; ML5791eco: 76.2 - 406.4mm
Continuous paper (length)
First printable line
(from top of page)
No. of multi-part forms
Multi-part paper thickness
Paper feeding
Optional paper feeding
1
Check local OKI Printing Solutions website for latest driver releases and OS compatibility
Consumables Information: Only use genuine OKI Printing Solutions Original consumables to ensure the best quality and performance from your hardware. Non OKI Printing Solutions Original
products may damage your printer’s performance and invalidate your warranty.
76.2 - 558.8mm
Continuous: 2.12mm; Cut sheet: 0.5mm
Up to 6 (one original + 5 copies)
Front/rear push feed: 0.36mm; Front/rear pull feed & front/rear
push-pull feed: 0.44mm; Bottom pull feed: 0.48mm
Manual insertion: Front or rear in, top out; Push Tractor: Front or
rear in, top out; Pull tractor: Front or rear or bottom in, top out
Single Bin Cut Sheet Feeder, Push Tractor (front/rear feeds),
Pull Tractor (bottom feed), Roll Paper Stand (ML5790eco only)
Simply Unique - 3 Year Warranty
Our devices are manufactured to the highest standards of quality and technology, which has been confirmed by independent tests. We are so convinced of the high quality of
our products that we are offering you an extension of the standard warranty period to 3 years – for free! Simply register your product within 30 days of purchase to be eligible
for our unique all inclusive offer. Fully covered by OKI! For further information please visit: www.okiprintingsolutions.co.uk/warranty
Without registration, the standard pan-European 1 year warranty applies.
WARNING! This product complies with EN55022 Class B. However when tted with the optional network interface card or optional cut sheet feeder,
compliance to EN55022 is Class A. In a domestic environment this conguration may cause radio interference, in which case the user may be required
to take adequate control measures
Oki Systems (UK) Ltd.
550 Dundee Road, Slough
Berkshire, SL1 4LE
United Kingdom
T +44(0) 1753 819819
F +44(0) 1753 819899
www.okiprintingsolutions.co.uk
© 2011 Oki Europe Ltd. Oki Printing Solution s is the trading name of Oki Europe Ltd. Version 1.2 01/2011.
Specication subject to change without notice. All trademarks acknowledged.