Ricoh 3050 printer, Error 990

SC-990 - Communication problem between BICU and input output board or software performance error.

I would suggest contacting Ricoh customer service.

Error 990 indicates a dirty sensor, so either a maintenance unit is dirty or you have a clogged print head. You can read more about this error on Richo website where you can see in the images what you need to clean.

http://forums.linux-foundation.org/read.php?30,2996 Date: October 31, 2008 02:18PM
ERR (990) ??? I turned it off and back on & still gives me this error code?
Date: January 09, 2009 03:26PM
This is a known manufacturer error. Call Ricoh Direct and talk to someone in Tech Support. If your product is registered with them, they will send you a new printer. You will have to ship the old one back in the same box the new one was shipped to you in, but they provide an RMA # so there isn't any charge.

Hi,
Error 990 means the problem is with the scanning unit which is basically called a laser unit as well that requires a replacement.
Thanks and regards,
Anil.B.R

replace drum, drum cleaning blade,charge roller. this will sort Sc 990

This is an error that has to do with the ink drying up on the maintenance unit. This cannot be fixed by the end user and must be fixed by Ricoh. Error 990 is a Ricoh defect in which the printer should qualify for replacement.

change the ink collector located in the rear of the machine

ink collection tank full .

Error 990 can be cuased by many things. Most of the time it is related to the Hard Drive. you could try replacing it.

990 A Waste Tank Full Sensor Defective
The waste ink tank full sensor (a
photosensor) on the corner of
the waste tank is not operating.
• Waste ink tank sensor on the corner of
the ink waste tank is defective.
• Replace the waste ink tank.