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.
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.
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
I’m happy to assist further over the phone at https://www.6ya.com/expert/joe_8b8c2cd6ce148309
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