Question about Ricoh Aficio SP C410DN Laser Printer

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Ricoh Aficio SP C420dn Printer. The printer at

Ricoh Aficio SP C420dn Printer. The printer at first kept coming up with a message of open slot A and remove the paper jam but nothing was there. And now when we turn the printer on it comes up with Error occurred sc491. The only thing we've done to this printer is replace the black framing within the front door area b/c of a tab being broke on it.

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Sc491 is a high voltage output error. Combined with your jamming issue, it sounds like a possible electrical problem somewhere. A good first step is to turn the machine off and unplug it, then take off the covers and reset any connections or cables you can get to.

If the problem persists, you should have a service technician take a look at it because it might need a board replaced.

Posted on Jun 05, 2010

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Posted on Jan 02, 2017

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2 Answers

My Ricoh Aficio SP C420DN Laser Printer shows color tone SC366 and some time SC365, any ideas?


You just have a problem with colour PCU (SC 365 - magenta, SC366 - cyan). The main reason is that toner density is abnormal. Sometimes, when you replace toners, printer receive to much toner for a short time, and after that you have an abnormal toner density (higher). You can check in service mode (hold up and down arrows for 6-7 sec, release them and press ok button) following thing :
choose 2. engine
then with arrows choose 3. process
then choose Vt display,
for each color by default there should by somewhere arround 2.4V. If you see for some colors, for example 0.02V, then this is a problem(to much toner). In this case the only thing that you can do is to restart printer and try to print enough pages, filled with problem color. Usually you can print max 3 pages. Then restart printer and try another 3 pages. Print until the you will be able to print at least 4 pages continuously.
Good luck and remember that this is a technical problem and you should ask someone qualified for the job. I am sure that 80% of service engineers can't repair this issue. But I can.

Apr 17, 2015 | Ricoh Aficio SP C420DN Laser Printer

1 Answer

How to clear functions


Open left printer cover. Open PCU cover. Pull Magenta, Yellow and Cyan PCU units and check which one has blocked!!! Probably you will need to replace color PCU (type 145). Good luck

Sep 30, 2014 | Ricoh Aficio SP C420DN Laser Printer

1 Answer

What could be the problem on ricoh printer sp c420dn its given me error code sc 364


Probably you have just replace some of the toners (black). The toner density is too high. Restart printer and try to print full A4 black page.

Aug 30, 2014 | Ricoh Aficio SP C420DN Laser Printer

1 Answer

What the solve Ricoh Aficio c420dn error code sc304


Check your charge roller. . Try replacing the charge roller.

Jul 06, 2014 | Ricoh Aficio SP C410DN Laser Printer

1 Answer

Sc362


SC362 is a Cyan TD sensor high error.TD sensor defective. Replace PCU.

Mar 23, 2014 | Ricoh Aficio SP C420DN Laser Printer

1 Answer

I am looking for thresdhold when the Ricoh aficio sp c420dn printer sends out the toner low message. Is it 15%? I cant find this anywhere. There are other Ricoh models also.


Ricoh sense toner in the following methods:

Toner Near End
To detect the toner near-end, the machine uses:
Pixel count (memory chip on the AIO)
AIO rotation distance (memory chip on the AIO)
Toner End
To detect toner end the machine uses:
Output from the TM sensor (center)
After near-end, it is estimated that 200 pages (A4, 5% coverage) can be printed until toner
end occurs.

If I could be of further assistance, let me know. If this helps or solves the issue, please rate it and give a testimonial for my response

Thanks, Joe

Apr 01, 2011 | Ricoh Aficio BP20N Laser Printer

1 Answer

I have ricoh laser printer aficio sp c420dn showing error code SC270


sc270 is an error with the shutter on the laser unit. Turn the machine completely off and then back on -- if the error doesn't clear, the shutter sensor or motor will likely need to be replaced.

Feb 16, 2011 | Ricoh Aficio SP C410DN Laser Printer

1 Answer

How to open front cover for ricoh aficio c820dn printer as it is displaying message " open the front cover to check the paper jam"


Hi there !

You have to open the front cover means that you have to oper the toner compartment and check for the paper jammed inside.

Did it helps your or you find the paper jammed.

Jan 29, 2011 | Ricoh Aficio SP C820DN Laser Printer

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