Me marca error sc400 una ricoh c2030 - Ricoh Office Equipment & Supplies

This is where you can get the manual with the answer:
http://support.ricoh.com/bb_v1oi/html/oi/rc2/model/spc250sf/spc250sfen.htm

SC400 cannot be cleared by the user. This is a fatal hardware error code. Call you dealer or repair company to get it fixed.

Problem with the yellow laser unit. Probably need a tech for that one.

it needs to install the drivers of the scanner

fix copier is a youtube channel
fixing error in videos
this is a video see you how to fix sc 395
https://www.youtube.com/watch?v=cI6o6mYOqow

Nashuatec is made by Ricoh.. SC400 means that there is a problem with the fixing unit.

That error is caused by an overload in the Fuser Unit.
See if you have any jam. If so try try to remove it with careful.

how to solve

TD sensor error

Symptom: The TD sensor outputs less than 0.5V
or more than 4.0V 10 times
consecutively during copying.

Possible Cause: • TD sensor abnormal
• Poor connection of the PCU

sc400 is a process control error. Did you just replace the all-in-one toner cartridge? If so, take it back out and try again -- it might not have been in all the way. If the error still occurs, check the contacts between the toner cartridge and the machine -- they may have gotten bent or dirty.