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SC 544 is a fuser overheat error. This could be caused by power outage or fluctuation in the power.
go to service mode. Hold down both "home" and "simple screen" for about 5 sec. and then press "user tools"
once in service mode go to SP5810 reset fuser error.
and reboot the machine.
998 Application start error • Software defective; change the firmware for the application that failed • An option required by the application (RAM, DIMM, board) is not installed
SC995
Serial Number Setting Incorrect
The 11-digit serial number is printed on the data plate. This information is compared with the installed components to detect mismatches. Did you remove any of the machine parts or components? Reinstall anything you removed and see if the error is resolved. If it's a problem with the NVRam, you'll need to contact an expert.
Here is the answer from the Ricoh Service Manual...
An SC899 occurs if the MFP is accessed from WIM (Web Image Monitor) after receiving an IP-FAX.
Because a firmware bug in the Network Support firmware is causing this symptom.
Call a Ricoh tech and have them update the Network Support firmware to ver.10.55 or later.
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