Sc990 in ricoh aficio2045 - Microsoft Windows XP Professional

Common error code on them. Reset is normally by power cycling.

https://www.google.com/search?q=Ricoh+MPC2051.+How+to+solve+SC990+error

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SC990 means that the hard drive has failed..... It needs to be replaced with a new one or a hard drive from another copier of the same model. Or you can disconnect the finisher.

this is software performance error.but this in most cases will appear on life over of either drum or developer.

sc990 has many reasons first drum unit defeactive and software on machine sluggish

sc990 is a general software error. It could be caused by a specific application or function, or it could be caused by a problem with the process control. In general, you can get rid of the sc990 error by turning the machine off with the main power switch (the orange switch on the left side of the copier) but if the error comes right back, the best first solution is to update the machine's firmware.

sc990 is the software problem. replace the HDD of the machine and it should be fine. don't format the hard drive as it might result in laser error code.

El c?digo de error SC 990 tambi?n puede estar asociado con tiempo de mantenimiento, te sugiero que reemplaces el PCU o repares tu PCU actual.

The light copies and overtoning is probably caused by the developer going bad. Do you have a service contract on your copier? It's likely time for a whole PM (preventive maintenance) procedure.

The sc990 is probably caused by the copier's condition as well. Once you have the PM done (or at least replace the developer, rebuild the photoconductor unit, and clean or rebuild the transfer unit) the sc990 codes should go away along with the poor copy quality.

sc 990 relates to the nv ram chip on the main board also check the values of the lazer unit are correct and not changed

If you use Katun OPC drum in your machine and is work more 80000 copies you need to replace the OPC drum and the drum cleaning blade.After replace the drum perform the process comtrol and the SC990 disipaire.Whenever use other genuine parts and not original Ricoh parts appair SC codes to refer HDD parts.100% this method is working.