Question about Ricoh Aficio CL7000 Laser Printer

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My printer is telling me to 'replace the bk dev unit (type d) hel

Do I need to buy an extra part?

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1 Answer

Internal counters control this. Yes! There are 4 of these units: Black, Cyan, Magenta, Yellow, and also 2 drums (Black and colour) You can continue to use the machine. You will likely see a deterioration in quality before long. You will have to contact a Supply company to acquire the units, but you can replace them yourself. Here is a link to the manual if you don't have one:

Hope this helps.

Posted on Feb 14, 2009

  • Anonymous Feb 14, 2009

    Correction, there are actually 4 drums on that machine as well :)



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Related Questions:

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When i turn on the machine,error shows on the screen,development unit is not installed properly

1. Defective electrical connection for the TD sensor.

2. TD sensor not installed correctly

1. Take out the dev unit

and put it back in. If that

does not work, replace

the dev unit.

2. Press the TD sensor

firmly against the frame
of the development unit.

Jan 02, 2016 | Ricoh Aficio Type R1 3228c / 3235c / 3245c...

1 Answer

Got an error code E000020-0340. Can anybody help with the code description. Probably one of the drums by the related answers in other posts.

It may unable to adjust the control voltage at Bk inductance initialization.

1. Check if the Drum Unit (Bk) is installed.
2. Check the Drum Unit Relay PCB (Bk)
3. Check the Drum Unit Memory PCB (Bk)
4. Check the harness/connector between the DC Controller PCB and the Drum Unit Relay PCB (Bk)
5. Replace the Drum Unit (Bk).
6. Replace the DC Controller PCB.


Feb 09, 2015 | Office Equipment & Supplies

1 Answer


first chek dev unit toner? pls insert toner 1087+ 1087+ 130 set dev enter ok then 10 mnt wait and check drum and dp closing time corect sitting or chage edge of dp unit you cleang time smothing wrong?? comng blnk copy

Aug 03, 2012 | Kyocera Mita KM-2550 All-In-One Laser...

1 Answer

Error 7410:0041407

Oh yes 7410 know it well and it is always an easy fix.. forget the digits after the :0041407 , thats how many pages you have printed...41thou

7410 aka Drum is not in position, a jam or press of wrong button in area of waste bottle causes it to move out of socket a tad.

Ok first step, open lid to remove toner but DONT unlock toner from dev unit, no press nothing, just grab the toner unrealeased and lift up, the whole toner and developer unit will emerge.. put it down on level surface.

Open left door and remove waste bottle, Now have a look just above waste bottle area for a little 2cm square grey flat button, this is drum release. Push against this area gently, pushing into the machine from left to inside, drum should move a tad and button should click, put back in waste bottle, slide back in dev unit, power on, your done..

sorry I was late for original poster but thought others may find this helful in time.

please note it is this same answer for all kyocera 7410:whatever faults


Oct 13, 2009 | Kyocera FS-2000D Laser Printer

1 Answer

What does code: DK means?. How can I fix it?

This code indicates that the Black Drum has reached 100k. It could also be the black developer and primary transfer belt are at 100k.

DC = Drum Cyan
DM = Drum Magenta
DY = D
rum Yellow
DK = Drum blacK

Even if it is reset you will still need the drum unit or drum/mc kit replaced very soon. These units do not last much longer than specified. After this the print quality deteriorates rapidly. Eventually the drum edges wear away so much that they can force developer out of the dev tank. You can usually get away with not replacing the K dev. If you reset the K dev at the same time as replacing the K drum unit, the machine adjusts itself can function normally. A dev normally lasts 200-300K. The primary belt unit lasts longer than the 100K spec and often beyond 200K out of them before replacement or refurbishment.

Finally, make sure that the Firmware is up to date.

Sep 30, 2009 | Sharp MX-3501N All-In-One Printer

1 Answer

I have a clp-350n samsung colour printer. Prints B+W images fine. When a colour image is sent to the printer the printer runs and runs and runs but never prints anything. It's as if the imaging belt can't...

There is an "opto coupler" in the main drive gear unit (right ride of machine) which controls the drive to the toner/dev units. If this (or part of the drive) is faulty it will give this error.

Jun 17, 2009 | Samsung CLP-315W Laser Color Printer

2 Answers

Replace Color Dev. Unit (Type B) alert

You stated message said replace dev units. Why did you replace the PCU's? There is a difference. The color pcu's can go into any color slot but the deverloper units can only go in one slot. The dev units have a u shaped green plastic part on the front of them and just slide out. The pcus have a little lever and have to be released.

May 26, 2009 | Ricoh Aficio CL7200 Laser Printer

2 Answers

Ricoh CL7000

You NEED to REPLACE the black development unit with a BRAND NEW item......these things are chipped so it won't accept previously installed units.If the problem still exists try a new PCU (toner cartridge).

Apr 04, 2008 | Ricoh Aficio CL7000 Laser Printer

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