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RFID Reader I/F Error An interface error was detected
with the RFID reader device.
01: communication error between
the RFID reader and the engine
02: the transceiver circuit error of
the RFID reader.
03: communication error between
the RFID reader and the Tag
04: the RFID Tag detection error
Try the following:
Switch the Power OFF from the back of the Printer and disconnect the
Power cord. Check the Primer Tubes. Reconnect the power cord and
power On the Printer.
Perform the Service Station diagnostic test to troubleshoot the problem
If the System Error continues, replace the Service Station .
If the System Error continues, replace the PrintMech PCA
Most C0900 range codes and specifically the 990 code refers to paper tray lifting. Pull out the paper drawers and check all the paper. Reload all the trays carefully. Then open/close the front door or turn off/on the machine to reset. If the code goes away great. If not then open all of the paper drawers, reset the code with the drawers OPEN. Then close each drawer 1 at a time waiting 30 seconds between each drawer closing. Once you close a drawer the code will come up within about 10 seconds. This will tell you which drawer is causing the issue. You can leave it out a bit so you can use the machine until you either find the issue with the tray or get a service guy out to fix it.
I have the Oki 5650 which had been great for about 18 months. Then found that the C cartridge was showing error as 'not installed'. After much fiddling about with it and checking on the internet I can now rectify this by either pushing down on the top of the printer while it boots up, or removing the small chip on the left top of the toner (make sure you have 'earthed' yourself to prevent any static damaging the chip when you handle it!) and taping securly onto the top of the cartridge above the chips proper slot. This now has been working OK for 6 months. Strange how this only affects the C cartridge (which has also been replaced and had the same problem). I suspect that the printers RFID chip reader for the C cartridge is having problems reading the chip and moving the chip closer to the reader by either taping to the cartridge top of puching on the top cover while printer boots up resolves the problem (for now anyway!) This can also trigger the 'service call 231 fatal error 03' message which also disappears if you follow the above procedure.
Hope this helps you.