Spares



















OKI Microline 520 Elite Marrow Carriage and 521 Wide Carriage 9-Pin Dot Matrix Printers

9-Pin dot matrix printer aimed at dedicated forms printing. Ideal for wholesale, retail and service environments where a verifiable paper record is wanted and for labels and listings. Maximum speed 433 cps.

  • Choice of 80 column ML520 (A4) or 136 column width ML521 at 10cpi.
  • High durability 9 pin head with a 200 million character life
  • "Intelligent Print Head" automatically adjusts printhead gap and print energy.
  • Print speed to 433cps at 10 cpi and 12 cpi
  • Barcode support.
  • Centronics Parallel interface as standard
  • RS232 Serial version available
  • 4 million character ribbon life
  • Up to 5 part forms, 1 original and 4 copies

The Elite models are upgrades to a a design dating back to 1992. OKI rather discouragingly quote MTBF figures of a few thousand hours for these printers but some of the original machines are still in use. OKI engineers have been very innovative in their designs, but rather conservative in their MTBF figures.

The 500 series advance over the "300" series is use of "intelligent head" technology automatically adjusting head-gap and print force.

The ML3320 and 3321 are very similar and have barcode support but the ML520 beats them at 10 cpi utility print. The ML5520 is a newer design with an almost identical basic specification but higher print speeds and a network option.

Control:

Touch-Buttons and lights along front of the printer.

Duty Cycle:

Base model MTBF 6,000 hours

Ribbon life:4 million characters in utility mode at 10cpi (re-inking cartridge)

Printhead life:200 million characters

Characters per second at 12 dpi.

High speed draft (12cpi & 10cpi) - 433cps

Utility (12cpi & 10cpi) - 325cps

Near letter quality (12cpi & 10cpi) - 81cps

Fastest print speed (10cpi) - 433cps

Up to 240 x 216 dpi

Carriage Widths:at (10cpi) 80 columns and 136 columns. In compressed mode 160 columns and 272 columns

Character Pitch: 10/12/15/17.1 /20 pitch & proportional

Typeface & Font: NLQ-Courier, NLQ-Gothic, OCR-B, High Speed Draft, Utility + Barcodes

Typestyles: Emphasised, Enhanced, Double Width, Double Height, Italics, Bold, Superscript, Subscript, Underline, Overscore

Paper Handling:

2 Versions ML520 with narrow cartridge 76&254mm. ML521 with wide carriage 76&406mm.

Standard Paper Handling: Paper parking, Zero tear-off, Autoload single sheet, Rear Push tractor.

Paper parts: 5 part forms, 1 original and 4 copies

Continuous paper 76&254mm 76&406mm

Continuous envelopes 165 x 91mm 239 x 102mm

First printable line (from top of page) 8.9mm

Optional Paper Handling: Pull tractors, Single/dual bin cut- sheet feeder, Roll Paper Stand (ML520 Elite only). Bottom tractors with stand and zero tear-off.

Memory:

64kb

Interface:

Standard Interfaces: Centronics Parallel

Optional Interfaces: Serial RS 232C/RS 422/Current Loop

Emulations: Epson FX, IBM ProPrinter/Graphics, Oki MicroLine

Power:

230V AC Frequency 50/60Hz.

Dimensions:

ML 520 Elite Narrow Version 165 x 431 x 380 mm

ML 521 Elite Wide Version 165 x 585 x 380 mm

Weight:

ML 520 Elite Narrow Version 8kg

ML 521 Elite Wide Version 10.1kg

Acoustic Noise:

57dB(A)/52dB(A) (quiet mode)

Consumables:

Ribbon (Life 4 million characters in utility mode at 10cpi (re-inking cartridge))

Printhead (Life 200 million characters)

Spares:

Access Cover - 2PA4094-7381G1

Back Up Roller Assy - 40917101

Cable Head Carriage - 2PU4007-1193P1

Case Gear Assy - 3PA4025-3406G1

Guide Roller Assy - 4PA4025-3719G1

Leaf Spring - 3PP4025-3320P1

LF Motor Gear - 3PB4055-2893P1

Operator Panel - 3PP4025-3670G2

Platen Assy - 3PA4025-3370G1

Platen Knob - 42269201

Pull Up Roller Assy - 3PA4025-3440G2

Ribbon Protector - 3PP4025-3430P1

Space Rack - 40904401

Support Protect Assy - 4PA4025-3382G1

Tractor Assy - 3PA4025-3330G1

Print Head - 4YA4023-2801G1

Logic Board - 4AY4042-1515G301

Power Supplies - 4YB4049-7031P2

Line Feed Motor - 3P4025-3357P2

Space Motor - 4YA4025-3250G1

Options and Accessories:

Roll paper stand (ML520 elite only)

Pull tractor feed - narrow, wide

Single bin sheet feeder

Dual bin cut sheet feeder

Bottom tractors with stand and zero tear-off

Serial RS 232C/RS 422/Current Loop Interface:

There is no specific Network print server. The OkiLAN 7120E is used with the ML5520/21 and that might be an argument for the more recent model.