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  1. #1
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    RISO MZ 770 color drum stuck

    I need help:
    color drum in mz770 machine is stuck, i tried to run the drum release action in test mode but wont work, can´t find the drum release button underneath the drum for a screwdriver, is there something like that?

    thanks!!!!


  2. #2
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    RISO MZ 770 color drum stuck

    VENRISO's Avatar
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    Re: RISO MZ 770 color drum stuck

    tries to remove the front covers, so you can see better inside the machine


  3. #3
    Just a fellow wanderer 2,500+ Posts Iowatech's Avatar
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    Re: RISO MZ 770 color drum stuck

    You should try resetting the machine by holding down the "Reset" key while turning the machine on, and continuing to hold the key down for 5-10 seconds. If I remember correctly, service mode 110 does mostly the same thing as well, so if you are comfortable using service mode you might try that too.
    Along those lines, if you are comfortable taking the back off the machine, you might take a look back there to make sure all of the solenoids are in the default position. While I have never seen that on the MZ line, sometimes on older machines the return spring on a solenoid will break or fall off, and in this case it sounds like the pressure solenoid didn't release and so the pressure roller is still in contact with that drum. Just be REALLY CAREFUL, as there are many sharp edges and very strong springs that WILL HARM YOU OTHERWISE! Especially with the pressure system.
    Hopefully that works, as the next kind of likely thing is that the drum is not in home position. While there is a manual release for the drum, I wouldn't recommend using it if the drum is out of home position as it will only make things worse, and actually a lot worse too if you don't know what to do next.


  4. #4
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    Re: RISO MZ 770 color drum stuck

    Hello

    I Seem to hava a similar problem. My Riso MZ 770 gives me the error Message "Rear Cover Safety Switch OFF" and i am unable to find out what to do about it. Have tried almost everything… I do see that the Print Drum 1 is not in Home Position, and have no clue what i school do now. Do you have any idea what this could be?

    Looking forward to hearing from you. Let me know what other information you need.
    Greetings from Switzerland
    Beni

    By the Way: The Reset function does not work on this machine…¿?

    Quote Originally Posted by Iowatech View Post
    You should try resetting the machine by holding down the "Reset" key while turning the machine on, and continuing to hold the key down for 5-10 seconds. If I remember correctly, service mode 110 does mostly the same thing as well, so if you are comfortable using service mode you might try that too.
    Along those lines, if you are comfortable taking the back off the machine, you might take a look back there to make sure all of the solenoids are in the default position. While I have never seen that on the MZ line, sometimes on older machines the return spring on a solenoid will break or fall off, and in this case it sounds like the pressure solenoid didn't release and so the pressure roller is still in contact with that drum. Just be REALLY CAREFUL, as there are many sharp edges and very strong springs that WILL HARM YOU OTHERWISE! Especially with the pressure system.
    Hopefully that works, as the next kind of likely thing is that the drum is not in home position. While there is a manual release for the drum, I wouldn't recommend using it if the drum is out of home position as it will only make things worse, and actually a lot worse too if you don't know what to do next.



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