Original Oki Toners

Manufacturers original toners give the best quality print.   This may be important in some colour print applications.






Original Oki Drums

The drum is actually a developer - drum unit containing most of the print mechanism. Drums have a design life of 20,000 pages.

It may be worth noting that mixing OKI original and compatible toner in a developer is not guaranteed to work at all well. Avoid doing this if print quality is a priority.

Also not that you need to be fairly swift about changing drums, five minutes exposure to bright office lighting is about their limit. If you want to preserve them for any reason put them in a black bag in a box with no holes.






Original Fuser & Belt

The fuser fixes toner powder to the page using a combination of heat and pressure. This fuser has a relatively short life of 60,000 pages (some larger printers achieve fuser lives exceeding 200,000 pages). On the other hand it is not very expensive and cartridge loadable, so you don't need an engineer callout for the job.


The transfer belt likewise is given a short rated life but is user changeable. The belt is under the drum-toner units, secured by two blue latches and liftable by a blue handle. Put the drum-toner units on a clean sheet of newspaper or suchlike whilst you change the belt and cover them with something to keep light off - like a few more sheets of newspaper. Changing the belt isn't an onerous job but since it only happens every 60,000 pages it won't be familiar.



Rollers & Pad

Oki manuals suggest changing the big roller if there is a feed issue and scarcely mention the small roller at all. The small roller doesn't do so much work and isn't quite so easy to change (not difficult though)

Big roller


Little roller


Change the pad if the printer persistently feeds more than one sheet. Worn pads generally have a visible scuff mark on top.


MP tray replacement

The MP tray roller appears difficult to get at and a complete replacement assembly is often used instead. We have not found much discussion of this on the web.






Options

The printer had an optional duplexer, 530 sheet cassette and expansion RAM when it was on the market.



In October 2015 we could find no trace of the other options in distributor pricelists. It seems unlikely that they were ever popular items.

Other Parts

Cassettes have a nasty tendency to get broken.



OKI C5650, C5750, C5850 and C5950

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Oki's 5000 series printers date back to 2002 with the C5100 and then the C5300 in 2003.   It was pretty succesful because they re-used and updated the engine several times, and based a great raft of models on it.

C5100, C5300 introduced 2002/3

12ppm colour, 20ppm mono, 600x1200dpi, 5K CMYK toners

22K drum, 45K fuser, 50k Belt. 420K or 5 year printer life.

Service Manual: 42049001TH dated 2003.

C5200, C5400, introduced 2003

16ppm colour, 24ppm mono, 3K or 5K toners,

22k drum, 45k fuser 50k belt, 420K or 5 year printer life.

and cut-down C3100 (2004), C3200 (2005), C5150n,

12ppm colour, 20ppm mono, Toner size varied with model.

Service Manual: 42615101TH undated (disassembly dated 2004).

C5250, C5450, C5510MFP, C5540MFP, introduced 2005. (AKA ES1624)

16ppm colour, 24ppm mono, 3K or 5K toners. Ethernet introduced as standard.

C5600, C5700, C5800, C5800L, C5900, C6100, introduced 2006 (AKA ES2032, ES2632)

20 or 26ppm colour, 24 or 32ppm mono, 600x1200dpi 4 level, Toner size varied with model.

20k drum, 60k fuser, 60k belt, 420K or 5 year printer life, automatic counter reset.

Service Manual: 43085101TH dated 2006.

C5550MFP, C5650, C5750, C5850, C5950, introduced 2007, brochures still produced in 2009. There was a 6150 but it seems to have been US only. ES2232 and ES2632 were "managed print" and copier sales versions.

22 or 26ppm colour, 26 or 32ppm mono, 600x1200dpi 4 level, Toner size varied with model.

20k drum, 60k fuser, 60k belt, 420K or 5 year printer life, automatic counter reset.

Service Manual: 43827101TH dated 2008.

Variants

Drums and toners change with each printer model (the prime reason for new models is to change toners).

Electronic components on the right hand side change with the feature-set as well.

Most of the other part numbers change as well, although the actual parts do not change much and the illustrations in the spares manuals stay pretty much the same. All printer brands do this to some extent, ordering a new batch of parts for a new model and it isn't clear whether there has been a reworking that means parts can't be swapped.

Next printer up would have been the C7350/C7550 series.

then the C711 - a bit faster at 34ppm colour and with 11k sized cartridges.

A series of A4 colour LED electrophotography printers with colour print speeds of 22 pages or more per minute.

The C5650 to C5950 models were on the market from about 2008 to 2010 so from Oki's point of view they are obsolete, although spares are still available in 2015.   The service manual says these machines were intended to last 5 years or 420,000 pages, but Oki machines are often well built and capable of more.   A lot of people are still using these printers in 2015, there is no reason they cannot last a long time. Quite frankly printing isn't progressing in leaps and bounds so repair will generally be worthwhile.

If the printer is misfeeding the problem is almost certainly the feed rollers or as OKI like to call them "hopping rollers" so repair will be easy - the roller clips onto it's shaft. If you don't use the MultiPurpose (MP) tray much then the test is to try it. If the printer works from the MP tray but not the cassette then the cassette roller is worn. You are meant to replace the big one; some people prefer to replace both.

The choice between more difficult repair and replace issues often come down to a matter of how many fresh toners you have for the old machine - if you have more than a couple in the cupboard then repair may be the better option. Considerations favouring repair are growing used to printer behaviour and building it into QC and staff training. Print manufacturers don't thank us for mentioning it but ready availability of compatible toners is also a point in the older printer's favour.

Things that might point you towards replacement are that Oki UK often give a 3 year warranty and that frankly printers don't go wrong all that much in that period, (they aim to keep you loyal to branded toner, of course). Another attraction is the opportunity to switch to a multifunction printer rather than needing an office copier.

LED Mechanism

Oki printers are "LED electophotographic" rather than laser printers, for the most part. Laser printers have one or two laser beams from a laser-diode very like those in a DVD player pointing at a fast-spinning polygon mirror.   Light is focussed on a photo-conductive drum and controls the accumulation of a static charge on it's surface.   This is well developed technology - it was the basis of the first laser printer back in 1970 and carried on through most modern laser printers. In the early 1990s the laser scanner was quite commonly a point of failure in printers and the parts tended to be expensive.

Oki developed their alternative technology using an array of several thousand LEDs held static over the drum. The LED technology doesn't need the hot-running laser or the polygon mirror; there is nothing but the row of microscopic LEDs pointing onto the drum.   Arguments have gone on since, so most OKI printers use LED technology, some Kyocera, Lexmark and Brother models do - but no HP or Canon models do.   OKIs printhead is unusual.

In practice laser scanners don't go wrong all that much and neither does the LED mechanism. Faults caused in either case tend to be white pages or faded stripes.

Toner, Developer, Drum, Belt and Fuser.

In other respects the Oki mechanism is conventional. A drum precharged by a roller is discharged by light. Where the drum is charged it repels toner presented by a developer roller. Where the drum has been discharged by light it attracts toner and makes an image.

C5650 cross section

This is a colour printer so it uses Cyan, Magenta, Yellow and Black toner-powder - the CMYK process. The CMYK process (known as "subtractive") gives bright print and a wide colour gamut but it does need four processes to run simultaneously, almost all colour printers do. The processes are quite reliable, so the combined vagaries of four of them is not usually a great problem.   Mono printers use just one process so they can be still more reliable.

This printer uses a transfer belt and transfers toner direct to the page. The belt ordinarily holds the "print media" such as paper and rotates under the succession of toner-drum stations. As the drums make the image, charge-rollers under the belt pull it across onto the paper. Once the paper clears the cyan drum the belt rotates away from the page - which continues through the fuser. A combination of heat and pressure in the fuser fixes the image to the page. The page can fall out of the fuser onto the "face-up" tray but ordinarily it goes through the exit assembly to emerge in the "face-down" tray on top of the machine.

Because there are four colour toner-drum combinations the machine has to compensate for slight misalignments caused by their positioning or by thermal expansion. It does this by placing an alignment pattern on the belt when it starts up, whenever the lid is closed, or every 400 pages in normal print. Optical detectors tell software where coloured lines were found, so the machine can automatically correct itself. This does use a bit of coloured toner, but not nearly so much as printing defective misaligned pages would. Waste toner receptacles in the toner cartridges and under the belt catch this.

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People sometimes wonder why consumable designs change with each new model of printer.

Print brands like to explain it as technical advance. There certainly is some advance in processor speeds and memory capacity which make low cost printers faster and more capable than they used to be. Network sharing has improved as well.   However you could be forgiven for thinking that colour printing now is not spectacularly better than it was 15 years ago - we think that as well. If you have the C5650 or one of its stable mates they are perfectly good printers.

One of the advances is price. Printers have got somewhat cheaper, which might partly be explained by scale economies. In the early 1990s a colour laser printer would cost £15,000 or so. In 1999 Minolta introduced a simple device for under £1000 and it proved very popular. Cartridge prices have not fallen and may be a bit more expensive now.

Cartridge designs have to change with new models because a design change gives the printer brand a temporary monopoly on toner sales, which is where the profit is.

Toner sales cross-subsidise new printer sales.

Print brands like Oki are not entirely to blame for this odd state of affairs; it became inevitable one someone had invented the cartridge.

When you think of buying a new printer beware of cartridge prices. There are cheap little colour printers for £100 - they take expensive low capacity cartridges. If you have printed enough to wear out a fuser or belt in one of these things you printed something like 50,000 pages - that's likely to be between 50 and 100 cartridges for cheap printers - costing something like £3,000 to £4,000.  …  The cost of the printer pales into insignificance.

OKI C5000 series

The OKI C5000 series was introduced in 2002/3. Some lower performance models with a basic control panel and no LCD were introduced under the "C3100 / C3200" heading a couple of years later. There is a brief summary of the printer family at the top right.

Introduced in 2007, the C5650 group of printers are an update of the C5000 series colour printers to incorporate new consumables to reflect enhanced performance and new technologies. The print engine did not change greatly in design over a decade. Printers in the same family have many parts in common - including the pickup and feed rollers. Consumable part numbers changed. The fuser changes part number but not appearance. The transfer belt is the same. Drawings in service manuals 43085101TH (C5500/C5600 etc) and 43827101TH (C5650 etc) seem identical - and they are both the same length at 249 pages although the layout changes in places.

Service and logistics personnel need to be careful about which model they have. These machines belong to a series with a quite distinctive design, highly recognisable. Within the series they are similar from the outside, control panels change a bit. Part numbers can be quite different however - and this may or may not signify design variation.

The C5650 Series

Network connection is built-in on all these printers. It became universal from about 2005 onwards - which is when the C5250 and C5450 came with it as standrd. The cost of the extra chip and the "TCP stack" to support it had become trivial.

All the printers take a similar range of accessories. The printers could also be bought as a "DN" Duplex version. A duplexer can/could be retrofitted. Note that expansion memory for the memory for the C5650/C5850 won't fit the C5750/C5950 - they have different processors.

PrinterProductSpeedBlack ColourLanguage ProcessorRAMAccessories
C5650N0121250122/32ppm8K2KHost Based, 200MHz, 64MB,
C5650DN0121260122/32ppm8K2KHost Based, 200MHz, 64MB, Duplex,
C5750N0121270122/32ppm8K2KPostScript, 500MHz, 256MB,
C5750DN0121280122/32ppm8K2KPostScript, 500MHz, 256MB,Duplex,
C5850N0121290126/32ppm8K6KHost Based, 200MHz, 64MB,
C5850DN0121300126/32ppm8K6KHost Based, 200MHz, 64MB, Duplex,
C5950N0121310126/32ppm8K6KPostScript, 500MHz, 256MB,
C5950DN0121320126/32ppm8K6KPostScript, 500MHz, 256MB,Duplex,
C5950DTN0121330126/32ppm8K6KPostScript, 500MHz, 256MB,Duplex, Tray,
C5950CDTN0121340126/32ppm8K6KPostScript, 500MHz, 256MB,Duplex, Tray, Cabinet,

Product Distinction

All models look much the same. Product distinction is between small and large sized colour cartridges and between host-based and PCL/Postscript processing.

Larger Cartridges

Printers that take bigger cartridges cost more. Larger cartridges are usually better value so the printer costs less to run. All the printers take a medium-large 8,000 page black. If you do sometimes intend to print colour but not very often then the C5650 and C5750 with their 2,000 page colour cartridge would have been the right product. If work revolved around colour brochures the C5850 or C5950 have lower running costs.

Standard Languages

The C5750 and C5950 can handle the conventional print languages PCL and PostScript. If you are in the graphics trades then you probably want PostScript because what you produce on your printer stands a better chance of being what colleagues and contractors can print on theirs. Standard print languages give consistency, so the print industry will often insist on files being PostScript.

The C5650 and C5850 were a bit cheaper because they can get by with a weaker processor and memory. They rely on the users computer processor and memory to do formatting in the same way it does for the screen through a Windows OS interface called the GDI(Graphics Device Interface). The computer then transmits this image of the page to the printer as a high speed bitstream . This does require extra resources from user computers, called "hosts" in industry jargon. Since modern PCs have several gigabytes of RAM and multi-core processors running at speeds in the gigahertz this usually works well.

Graphics professionals avoid GDI/host based printers. Odd print languages generally produce a "reasonable" page, but it is more difficult to get a guaranteed accurate page. In the past Adobe PostScript was the best way to have print on an HP LaserJet look just the same on an OKI printer. (We don't know which actual PostScript Oki used).

Printers in the series are pretty similar but the C5750N and C5950N support PCL 5c, PCL 6 and PostScript 3. They can also handle barcodes and an optional hard disk is available for these models as well.

The C5950 also supports PDF DirectPrint v1.5.

The C5550MFP is a multifunction device based on this print engine.

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The printer can produce a menu map to navigate around.

Press the Menu switch until [[Information Menu] appears

Press the Set switch so that [PRINT MENU MAP /EXECUTE] appears, then press Set again.

Software: Driver Installer (Windows only), WebPrint (Windows only), Print Control Server (Windows only), Print Control Client, Storage Device Manager2 (Windows only), Gamma Utility, Profile Assistant2

Control:

2-line 16 character LCD front panel display and menu buttons.

control panels

Support technicians like control panels because they make network setup easier and give explicit and sometimes directly meaningful error messages. These printers all have a control panel (the C3100 cut-down versions of the engine did not).

An embedded web server is also available. Printer Web-servers are often more informative than the control panel, but the control panel helps set the IP address so that you can get to the Web-server.

One of the nice things about these printers is that they do have an actual on/off switch at the right rear as well as a sleep mode and a shutdown mode initiated from the front panel.   This raises a problem; if you have a hard disk the manuals warn you NOT to use the switch but to shutdown from the front panel first. They say shutting down from the switch will damage the disk. (More likely it could corrupt data, but if you don't know how its formatted that has the same effect ).   In general we like on/off switches that break the circuit and really turn things off (10% of electricity is wasted powering things on standby) but this is one of those problem cases.

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Colour and Resolution

The human eye is sensitive to surprisingly fine patterns and can discern individual lines less than a thousandth of an inch thick (1200 dpi) from a distance of a foot or so, over a thousand shades of grey and well over a million colours. Printers need to give fine resolution like 600 or 1200 dpi for diagrams - anything finer will be almost invisible.

Obviously it would be impractical to have a million colours; colour print is often done using just four. The normal choice is to use Cyan, Magenta, Yellow and Black referred to as a CMYK process or "subtractive" colour and that is what these printers do. TVs and computer screens use an RGB "additive" process but that doesn't work well in print since merging inks produces dark shades. The CMYK process allows brighter colours. To get a solid green on a print page a print-works overprints dots of cyan and yellow. To get a lighter colour they print smaller dots and leave more white. Magazine print normally looks good at just 300 dots per inch. A computer printer can usually only print one size of dot and 300 dpi gives rather crude graphics. Computer printers work at 600 or 1200 dots per inch. As it happens the OKI LED mechanism can also manage 4 levels so that "dot modulation" improves things a bit as well.

Luckily for machine designers the eye doesn't discern fine patterns, colour and greyscale all at the same time. We may pick out that a fine line is not a constant black, but would struggle with whether it faded to grey or got thinner. If alternate lines are printed black and white at 1200dpi the result looks grey, but at 600 dpi dots or lines can be discerned and at 300 dpi they are clear.

The OKI C5650 makes a reasonable pass at magazine but perhaps not photographic or arthouse printing when set to its 600x1200 dpi mode. It may however slow down a bit, depending on image complexity, and particularly if it is one of the host-based printers.   If you must have photo-quality print then inkjet and dye-sub are options.

OKI have made a significant advance in this area. Some of their colour LED printers have five colours including a white. This changes the mix of colours that can be achieved - and allows printing on coloured card.

Duty Cycle:

Maximum 60,000 pages per month. Average 1,500 to 5,000 pages per month.

Printer brands would probably like you to buy a new set of cartridges every couple of months. People should probably aim for a printer that runs for at least a couple of months without a change of cartridge - it isn't so much that changing cartridges is trouble (although it can be) as that if you are changing them every month you bought a printer that is small for your needs and costly to run.

It can be quite difficult to estimate printing needs because they are usually made up of a mixture of single page and multipage jobs from a variety of people. The past is a guide, so have a look back through invoices for paper - a box of paper is 5 reams, 2,500 sheets.

The C5650 models print at 22 pages per minute in colour and 32 ppm in black & white.

First page out in 8 seconds mono, and 11 seconds or better colour.

Overhead Projection transparencies are printed with a cooler fuser and longer contact so the print speed drops to 10 pages per minute.

Engine resolution seems to be 600x1200 dpi and the service manual says this is 4 level.Hence the brochures say "ProQ2400 Multi-level technology", 600x1200 dpi

The printhead has a resolution of 600 dpi so for ordinary print that will be the hozontal resolution.

Auto Colour Balance, Photo Enhance via driver (excludes Mac and PostScript drivers)

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One of OKIs unusual (if not unique) selling points is that its laser printers can handle banners up to 1220 mm (48 inches)

This printer can also handle material up to 203 gsm using the MP try - possibly delivering to the face-up tray at the back with heavier material. That's an unusually wide range and has contributed to these machines being popular in the graphics trades.

The built in cassette holds around 300 sheets which is an unusual size - most manufacturers opted for 250 on light duty laser printers and 500 or 550 on office quality machines. The printers capacity could be expanded with one extra 530 page cassette tray - which becomes tray 2.

Series Summary

Paper Handling:

banner paper
legal paper
legal paper
postcard paper

A4 /US letter size paper path. 100 sheet multipurpose tray and 300 sheet main tray.

Multi-purpose tray: Custom Size (up to 1200mm length including Banner), 50 transparencies

Paper capacity of multi-purpose tray: 100 sheets of 80gsm.

Paper sizes: A4, A5, B5, A6, 10 Envelopes (Com-9, Com-10, DL, Monarch, C5), Labels (Avery 7162, 7664, 7666), Custom Size (up to 1200mm length including Banner), 50 transparencies

Paper Weight: 75&203gsm

Paper capacity of tray 1: 300 sheets of 80gsm. Paper sizes: A4, A5, B5, A6

Tray 1 paper weight: 64&120gsm

Paper capacity optional 2nd tray: 530 sheets of 80gsm. Paper sizes: A4, A5, B5,

2nd Tray Paper Weight: 64&176gsm.

According to the user guide print media must be able to withstand 446F (230C) for 0.2 second.

…   that is difficult to determine of course, so consumables recommended by OKI or at least certified for laser printers should be used. The main risk is usually glue on envelopes and transparencies. An inappropriate transparency can make a horrible mess of fuser rollers.

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An auto-duplex unit produces double sided print by taking a newly produced page and feeding it into a chute, in this case just above the cassette, then round and back to the print station. Auto duplex tends to be slower than single sided print but it save paper. It also produces work that looks more professional with less effort.

Duplex:

The auto-duplex unit inserts into the back of the printer and the reversing part protrudes increasing the printer depth a bit. The duplexer directs prints round and under the print mechanism instead of to the output trays; then it recovers them for reinsertion into the print station. Material goes through a path with a couple of fairly tight bends so the duplexer can't cope with stiff card or banner stationery.

Paper goes through a couple of tight bends in the duplexer. Supported paper sizes: A4, A5, B5. Supports Custom Size: Width 148-215.9mm.   Length 210-355.6mm.   Duplex paper weight 75 & 105gsm.   Materials that are out of range for the duplexer like card can be double-sided by doing it manually.

To produce double sided print manually take material that has been printed and put it back in the cassette face-up with the top at the front of the printer. It can also be put through the MP tray face-down with the top pointing into the printer. (The diagram of the printer hints at why).

Oki are quite generous with information about the processor - it is power PC architecture (as in older Apple Macs) and they give specific information as follows:

ProcessorHost Based
5650/5850
PCL etc
5750 /5950
CorePowerPC 405PowerPC 750CL
I-cache16KB32KB
D-cache16KB32KB (Internal L2: 256KB
Clock200MHz500MHz
Bus-width32 bit64 bit

Processor:

C5650 and C5850 are 200MHz supporting "host based" or GDI processing.

C5750 and C5950 are 500MHz supporting PCL and PostScript processing.

The PCL printers have a powerful processor for this generation of machine.

Memory:

C5650 and C5850 have 64MB and expand to a maximum of 320MB. C5750 and C5950 have 256MB and expand to a maximum of 768MB and can take an optional 40GB hard disk.

Because they use quite different processors expansion memories for the C5650/C5850 and C5750/C5950 are not the same.

Interface:

All printers have Hi-Speed USB and 10/100-TX Ethernet. The C5950 (C6050, C6150) also has IEEE 1284 Bi-directional Parallel. This was one of the last generation of printers to provide parallel interface.

C5650 and C5850 are Windows / Mac host based - they rely partly on the PC to compose pages. Transmission from computer to printer uses an OKI specific language called Hiper-C.

C5750 and C5950 use the conventional PCL and PostScript-3 Languages. Specifically:

PCL 5c, PCL6(XL3.0) PostScript 3 as an emulation, SIDM (IBM-PPR, Epson-FX).

Fonts: Scalable: 87 PCL fonts and 136 PostScript fonts; PCL Bitmap fonts. OCR-A/B; USPS ZIP Barcode.

Barcode with Checksum support

System Compatibility:

OS Compatibility Windows 2000, XP Home, XP Professional, XP Professional x64, Server 2003, Server 2003 for x64, Vista (32-bit), Vista (64-bit), Mac OS X PowerPC 10.2.8 or greater, Mac OS X Intel 10.4.4 or greater.

Ubuntu Linux CUPS has drivers for the OKI C5650 driver using foo2hiperc

Power:

AC 220-240 VAC frequency 50/60Hz +/-2%

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Oki's LED printers are similar to laser printers in their use of toner powder that is fused to a page by heat and pressure. Raising a stream of paper to about 200 centigrade takes momentary power roughly equivalent to a hair-dryer to run the "fuser" (sometimes called a fixing unit). Printers are built for the region they will be used in and the correct fuser must be bought. It usually isn't easy to modify a US printer for EU use or vice versa.

One of the points where more recent printers invariably score is that they have better power consumption figures for Off, Idle and Standby. Printers spend most of their time idle. A printer would have to use a lot of power for that to drive a replacement decision.

Power Consumption:

Power save 17W, Idle 100W (average), Typical 490W, Peak 1200W.

A power save mode consumption of 15 watts works out at about 2.5Kw hours per week - probably about 20-30p depending on how you pay for energy. That isn't all waste, (in chilly Britain it's low level room heating) but it is a bit high. OKI do provide an answer - the machine has an actual off switch. If your printer doesn't have a hard disk - and most don't - then turn it on when you come in and off when you leave.

Oki specifically say Operation with UPS: Operation with UPS (Uninterruptible power supply) is not guaranteed. Do not use UPS.   There is slight oddity since they warn people not to simply power off printers with a hard disk. However you need a rather beefy UPS rated at about 2 kilowatts (c 1.5KvA) to reliably work a laser printer - and that might cost more than the printer itself.

clearance around
clearance above

Dimensions:

C5650N339.5mm x 400mm (max 435mm) x 528mm (max 563.5mm) Approx 26kg
C5650DN339.5mm x 400mm (max 435mm x 621mm) Approx 29kg
C5750N339.5mm x 400mm (max 435mm) x 528mm (max 563.5mm) Approx 26kg
C5750DN339.5mm x 400mm (max 435mm x 621mm) Approx 29kg
C5850N339.5mm x 400mm (max 435mm) x 528mm (max 563.5mm) Approx 26kg
C5850DN339.5mm x 400mm (max 435mm) x 621mm Approx 29kg
C5950N339.5mm x 400mm (max 435mm) x 528mm (max 563.5mm) Approx 26kg
C5950DN339.5mm x 400mm(max 435mm) x 621mm) Approx 29kg

These two are what it says in the PDF - they seem odd ???

C5950DTN486.5mm x 400mm(max 435mm) x 621mm- Approx 36kg
C5950CDTN911.5 x 400mm(max 533mm) x 621mm - Approx 51kg

Acoustic Noise:

Operating: Up to 55.6 dB(A)

Standby: 37 dB(A)

Power Save: Background Level

Toner and drum positions
Oki toner and drum cross-section

The toner fits on top the developer, angled leftwards onto the spike of the waste-toner elevator as it is lowered and then locked into place with the blue lever. When the lever is unlocked a shutter closes the toner bottle base and it can be lifted free without much mess.

To remove the developer leave the lock-lever shut and lift the whole mechanism out by the bottle. Place it on a piece of paper whilst you handle it as there will inevitably be some lose toner on its underside. Don't turn the developer upside down - quantities of toner and developer material will fall out.

A new developer comes with an orange stopper over the developer mechanism. Again put it on a clean piece of paper and remove the stopper. Do not then turn the developer over - the material will fall out! Attach the (new) toner cartridge before lowering the thing into the printer.

OKI chose to have different sized toners, they represent different ownership value propositions.   We aren't so clear why they don't have one drum across the printers and indeed for all the colours. Once a developer/ drum has toner in it the colour can't be swapped, but it doesn't have to be sold with toner in and then it wouldn't need to be keyed to the slot. It would have made the logistics easier. They didn't choose that path.

Consumables:

Running cost ought to be one of the key factors in deciding to buy a printer.

With these models OKI gave a choice, pay more for the printer and get the ability to use bigger colour cartridges with a lower price per page. It's a pretty explicit trade-off with these machines but commonplace in the printer industry.

OKI use separate toner and drum units. Drums often have the ability to last longer than toners; in the case of this printer drum life is around twenty thousand pages whilst the small toners last just 2,000 and the large black toners 8,000 pages.   Environmental and economic advantages should favour of OKI's arrangement.

ColourPages: Compatible with OKI codeGTIN
Black8,000 OKI C5650, C5750 4386570805031713039808
Cyan2,000 OKI C5650, C5750 4387230705031713039792
Magenta 2,000 OKI C5650, C5750 4387230605031713039785
Yellow2,000 OKI C5650, C5750 4387230505031713039778

A complete set of Oki C5650 original toner cartridges is usually available for just under £300.

Drum units are as follows:

ColourPages: Compatible with OKI codeGTIN
Black20,000 OKI C5650, C57504387000805031713040125
Cyan20,000 OKI C5650, C57504387000705031713040118
Magenta20,000 OKI C5650, C57504387000605031713040101
Yellow20,000 OKI C5650, C57504387000505031713040095

Note that when you change drum Oki recommend also starting a new toner and a significant part of a 2,000 page toner is expended priming the new drum / developer combination.

The fuser and transfer belt have recommended lives of 60,000 pages.

Fuser60,000 OKI C5650, C5750, C5850, C59504385310305031713039761
Transfer Belt60,000 OKI C5600, 5650, 5700, 5750, 5800, 5850, 5900, 5950 and the C710, MC560 and C5550MFP.43363412 or 4336440205031713041894, 05031713031543

Other Printers in the Family

For convenience and interest in the prices we may as well list the other toner and drums for printers in this family.

ColourPages: Compatible withOKI codeGTIN
Black8,000 OKI C5850, C5950, MC5604386572405031713039884
Cyan6,000 OKI C5850, C5950, MC5604386572305031713039877
Magenta6,000 OKI C5850, C5950, MC5604386572205031713039860
Yellow6,000 OKI C5850, C5950, MC5604386572105031713039853

Rainbow or multipack is sometimes called 4386572-pack

Drum units are as follows:

ColourPages: Compatible with OKI codeGTIN
Black20,000 OKI C5850, C5950, MC5604387002405031713040200
Cyan20,000 OKI C5850, C5950, MC5604387002305031713040194
Magenta20,000 OKI C5850, C5950, MC5604387002205031713040187
Yellow20,000 OKI C5850, C5950, MC5604387002105031713040170

OKI use regional codes for consumables so those listed aren't valid in the US and Asia.

Warranty:

OKI were offering a free 3 year onsite warranty or £50 Cashback. OKI seem keen on this cashback business. All of these printers will now be beyond warranty even if it were extended.

Options and Accessories:

Duplex Optional (43347502)

2nd Tray Optional (43347602)

Memory for C5650 and C5850 - 64MB (01214001) or

256MB (01214002)

Memory for C5750 and C5950 - 256MB (01182901) or 512MB (01182902)

Hard Disk - 40GB. (01184501)

Cabinet Optional (09004619