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Riso Error T01-520 Drum Stuck

Hi I have a T01-520 error on my Riso RN2550. I changed the colour drum over to one that has not been used in a while and now it will not work and just errors when it goes to make a master. It also will not release the drum. I have tried looking through the service manual, rotating the drum manually and holding the little release switch under the drum to unlock it and it still will not pull out and stay locked! Please help!!

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  • info57690 Oct 01, 2009

    Hi, I can't see any other numbers on the error code. The machine was working perfectly until i put this other drum into the machine. Is there any way I can get this drum to release so that I can put the other one back in to see if it helps? Could it be something with this drum that is stopping the machine motor? I picked this machine up second hand so don't want to have to call in a service guy and would rather try and repair. Should I be able to rotate the drum from under the scanner unit? at the moment it wont budge!

  • info57690 Oct 01, 2009

    Hi I have gone into the service menu and tried to release the drum using service number 556 but it is missing from the service menu. It has 555 and then goes to 557!. I also can't see the pins to see if they are damaged. Any further suggestions?



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Try unplugging it for 5 minutes and letting it reset, this usually works for most electronic devices that dont have a manual reset...

Posted on Oct 02, 2009

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T01-520 is not drum stick. All the All 520 errors refer to main motor lock/ motor limit sensor faults (T01 is fault that requires maintenance). Drum error is T01-520-520. In your case 520 is the problem code, not the area code. It is not the drum stuck, it is the main motor because there is a fault.

Replacing drum won't help , since the fault concerns the main motor.
It would be useful to know if there is an area code after 520.
Print this out, and read here how to check new Riso codes.

Posted on Oct 01, 2009

  • Ginko
    Ginko Oct 01, 2009

    The drum does not release because the motor is not working.Check the drum connector on the drum side and machine side to see if there are any pins damaged.

    To release the drum you have to go to service mode and use code 556.

    to get to service mode you must hold the print position buttons < > down while you turn on the printer at the same time.
    I must warn you that doing this procedure there is risk of more damage. Riso reccomends calling a technician when you get this code.

    Before attempting service mode, try disconnecting power for two minutes, and power cycling the copier (restart it).




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