My Savin SDC 103 has an SC-172 call service error. The copier was given to me, it only has 7800 copies on it. The error showed up after they moved it.

sc 590 is an exhaust fan motor error
the fan could be failing as for the copy quality the pcu will probably solve that problem

some potentially useful information can be found here: what the error codes mean, and the services manual; (I have pointed to error code 792 but the others are different pages), there is a copy of the service manual too. This is only a starting point !
http://printcopy.info/?l=en&mod=free&chap=erc&brand=Ricoh&model=Aficio 2022&page=6
(link hasn't copied well, last line is part of it)
Try also this
http://copierliquidationcenter.com/Copier_Repair_Service/index.php?topic=44.0
for Error sc792 see
http://www.copytechnet.com/forums/ricoh-savin-gestetner-lanier/35515-ricoh-aficio-2022-a.html
for sc870
Thread Ricoh 2238c SC 870 Address book error
for sc548
Thread RICOH Aficio MP C3500 Error Code SC 548 and 549
hope that lot help :)

Hello.
That error is related to TD sensor error.
I advise you to call a trained Technician

There's a video showing how to clear SC error codes: Resetting Ricoh Savin Lanier SC Error Code There's also a discussion here: Thread Ricoh Aficio 220 error SC392

Ricoh Savin Gestetner Lanier error code errors

TRIY THIS FIRST.
http://www.copy-star.com/component/option,com_contact/task,view/contact_id,1/Itemid,37/lang,el/

THIS NEXT.SEND AN EMAIL WITH ERROR CODE.......

This is a common error code for Ricoh copiers, Savin and Gestetner copiers that need service. Recently Ricoh has purchased Lanier and now is naming all their new machines Lanier instead of Gestetner, Savin and Ricoh. However, the copier service error codes have remained he same.
When you get this copier printer service code it means the fuser or fixing assembly (same part) has thermistor problem. The copier fuser's thermistors help regulate the temperature of the fuser assembly. The fuser assembly on all copiers including Canon, Kyocera, Ricoh, Sharp and other brands is the part that melts the toner onto the page.
Getting back to the repairing the copier on Ricoh, Savin, Lanier and Gestetner models that have the fuser or fixing code error. The majority of the time the fusers' thermistors (Middle and read) need to be replaced. Just cleaning them will not solve the copier repair service code.
It is usually, depending upon the machine, its a 1 to 2 hour copier repair job because the copier repair service technician will need to dissemble the fuser, insert the two new thermistors, re-assemble, reset the error code and test the copier machine repair. Also, ask the copier technicians to to do a copier cleaning maintenance while on site.

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

Unfortunately, I've never seen this error, so I can't give you much help beyond what the code means and the possible solutions that the service manual provides...

SC820:
Self diagnostic error: CPU - Unexpected external error or interrupt occurred.
• Controller board defective
• Software defective

The manual indicates this is a "C" type code, so this should not be displayed on the OP panel, only logged in the SC history in the machine.

That error is for the shift tray motor in your finisher where the copies come out. The tray should move from side to side when you switch the machine off and on. It sounds as if it is binding for some reason.

you have an over heat error. you need to test your thermistors, s and lamps for continuity.replace bad parts. then you need to go to service mode and reset the code

Parts availability ended for this machine Jan of 07, now is a good time just to chuck it.