Fatal error 122 on a oki c5200 printer

Here's a place to start: http://www.oki.co.uk/support/printer/troubleshooting/detail.aspx?id=tcm:122-98675-16&prodid=tcm:122-2888

Hi,
Error030 indicates that an error has been detected in operation checks on the RAM in slot 1. First note the 24-digit addresses (generally 3), then restart the printer. Check reproducibility if possible. Repeat the same operation after restarting the printer and check if the same service call message appears.

OKI C 5800Service Call 106:Fatal Error.

Fuser error. Replace fuser or if no-go, Main board.

Replace the transfer belt unit. A 917 is a belt **** sensor error.

We had a similar problem with an Oki C7300. It was reading "Fatal Error 121" on the display.

We fixed it by simply unplugging the printer from a surge strip and plugging it into the wall directly. After that, the error went away and has not come back.

I had the same error with an Oki C9600N. Called OKI, and was told one of two things has apparently gone bad: a DIMM (in slot 1) or the controller board. I removed the RAM, cleaned the contacts, blew out the slots (w/canned air), and reseated the RAM. Printer is back up and running. Hope this helps someone.

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Take the printer off the network. (Remove the network cable) Then enter the menu and select network menu. You want to change the settings as described below:

Change the Hublink Setting to "100 base tx full"
Change the FTP Setting to "Disable"

Once done and machine says online, shut it off, reattach the network cable and restart the printer.

You may also want to change the printer's IP address.

If this does not help, or you cannot get past the 002 fatal error then the machine will require service.

From OKI error log:

Lower heater temp state - Low
backup roller thermistor indicates low temp
seek service if turning off/on printer does not solve problem

from your service manual....main board issue

177 - Replace fuser