Troubleshooting 6 - 5 OKIPAGE 6e/6exService Manual, P/N 59276401CategoryController errors Optional Software ROMCheck ErrorAn error was detected by optionalsoftware ROM check.Check the optional software ROMboard for proper connection orreplace it.PC display status message Trouble or status RemedyOptional RAM CheckErrorFAN Motor ErrorFuser ErrorThermistor Short CheckErrorA fault occured in the fusing unit.(Thermistor short check error)See 6.5.2-4.SSIO Interface Error Power supply board SSIO I/F error Replace the power supply board orthe Main Control PCB.A fault occured in the fusing unit.(Timeout error, etc.)See 6.5.2-4.Thermistor Open CheckErrorA fault occured in the fusing unit.(Thermistor open check error)See 6.5.2-4.A fault occured in the fan motor. – Check the fan motor for properconnection and for any presenceof foreign matter in the fan.(See 6.5.2-5.)– Replace the fan motor or theMain Control PCB.An error was detected by optionalRAM check.– Check the optional RAM boardfor proper connection.– Check the mounting position ofshort plugs and additional RAMchips. (See 7.4.)– Replace the optional RAM board.Table 6-1 (Cont'd)