Oki Microline 420 User Manual (English)

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It’s designed for commanding performance in

demanding environments.

The OKI

MICROLINE

420 9-pin printer and its

wide-carriage counterpart ML421 are a quantum leap

forward in Impact printer performance.

Engineered for dedicated forms printing in the most

demanding point-of-sale, automation and utility

environments, ML420/421 printers are right at home

in applications such as retail sales counters, medical

facilities, automotive rental and repair shops, airline

boarding gates, financial departments and manufac-

turing sites. Their print speed and versatile paper

handling make them ideal for the office, too.

Performance is built in. The ML420/421 sport

features that give them a strong edge over their

predecessors as well as the competition:

• 3-piece top cover provides easy access and

unsurpassed break resistance

• An internal cooling fan provides continuous airflow

for the printhead—maximizing throughput

productivity for long, unattended print jobs

• Additional feed rollers provide precise forms

handling and printed-character placement accuracy

Highlights:

Rated at 20,000 hours MTBF

3-Year standard warranty

Print speeds up to 570 cps

Integrated USB and IEEE Parallel connectivity

standard

Optional OkiLAN

6120i 10/100 Base-T Ethernet

internal print server

Crisp, clear printing on 6-part forms

Expandable head gap – accommodates multi-

part forms and cut-sheet stock including labels

and stiff index stock

128 KB receive buffer/memory

7.5 million-character ribbon life

200-million character printhead life

Small footprint – ideal for retail countertops

Uses the same accessories as

ML320/321 Turbo Series

SuperSpeed Draft Mode.

Reliable,

fast

and

easy to use.

Exceptional paper-handling versatility. The

ML420/421 have a zero-tear feature that accurately

positions continuous forms for a clean tear at the

perforation, which eliminates wasted stock. You also

get perfect results with single sheets, index stock,

labels and envelopes, too. All without jams or smears.

Value that goes the distance. The OKI ML420/421

deliver the kind of productivity usually reserved for

printers many times the price—starting with a super-

fast print speed of 570 characters-per-second (in

SuperSpeed Draft mode).

Then there’s the rugged printhead—with its

200-million character life, powerful samarium cobalt

magnets and stored-energy pins— delivering precise,

sharp characters all the way through to the last

page of a 6-part form. And the patented OKI

closed-loop feedback system that assures character

placement accuracy.

The OKI ML420/421: Just turn ‘em on and

turn ‘em loose.

This rugged dedicated forms printer

is backed by a 3-Year standard warranty.

Narrow carriage

MICROLINE 420

OKI

MICROLINE

420/421

9-Pin Impact Printers

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Oki Microline 420 Specifications

General

Color	No
Maximum resolution	240 x 216 DPI
Maximum number of copies	6 copies
Media thickness	0.43 mm
Dimensions (WxDxH)	398 x 345 x 152 mm
Power requirements	230 VAC +15%, -14%
Compatible operating systems	Windows Vista 32/64, XP, 2000, 98/95, 3.x & NT 4.0; MS-DOS
Maximum duty cycle	24000 pages per month
Mean time between failures (MTBF)	20000 h
Sound pressure level (printing)	56 dB