Risograph: set master disposal box in place warning won't go away

My Risograph RZ990 master gets wrinkles at the end of the drum.
If your Risograph RZ990 master is getting wrinkles at the end on the drum, it can be a common issue with Risograph machines that may be caused by several factors. Here are some steps to help diagnose and potentially resolve the problem:
1. Master Roll Condition: Inspect the condition of the master roll itself. Wrinkles can occur if the master roll is damaged or has uneven tension. Ensure that the roll is loaded correctly and that it is not excessively loose or tight.
2. Master Roll Alignment: Make sure the master roll is properly aligned with the machine's drum. An improper alignment can lead to wrinkles during the printing process.
3. Drum Cleaning: Check the drum for any dirt, toner residue, or debris. A dirty drum can cause irregularities in the master's transfer, leading to wrinkles. Clean the drum gently with a lint-free cloth or an appropriate cleaning solution recommended by the manufacturer.
4. Drum Condition: Examine the condition of the drum itself. If the drum is scratched, worn, or damaged, it can affect the master's transfer quality. In such cases, the drum may need to be replaced or professionally serviced.
5. Master Roll Tension: Ensure that the tension of the master roll is correctly adjusted according to the manufacturer's guidelines. Incorrect tension can lead to wrinkles in the master.
6. Master Roll Quality: Check the quality of the master roll itself. If it's old or damaged, it may not feed smoothly, resulting in wrinkles. Consider replacing the master roll with a new one.
7. Temperature and Humidity: Environmental factors such as temperature and humidity can impact the performance of the master roll and the printing process. Ensure that the operating conditions are within the recommended range specified by the manufacturer.
8. Printer Settings: Verify that the printer settings, such as speed and pressure, are correctly configured for the type of master and paper you are using. Incorrect settings can lead to issues like wrinkles.
9. Maintenance Schedule: Follow the recommended maintenance schedule for your Risograph machine. Regular cleaning and maintenance can prevent issues like wrinkles and prolong the life of the equipment.
10. Professional Service: If the issue persists despite your efforts, it may be necessary to contact a professional technician who specializes in Risograph machines. They can diagnose and repair more complex issues and ensure that your machine operates smoothly.
Addressing wrinkles in the master of a Risograph RZ990 machine often involves a combination of proper maintenance, correct settings, and occasionally replacing damaged components. It's essential to follow the manufacturer's guidelines and consider seeking professional assistance if needed to resolve the issue effectively.

1. Turn off the machine and unplug it from the power source.
2. Remove the paper tray and any paper that is currently loaded in the machine.
3. Locate the retarder and the paper pickup rollers. The retarder is typically located near the bottom of the machine and is a rubber or plastic component that helps to slow down the paper as it is fed into the machine.
4. Use a screwdriver to remove any screws or fasteners that are holding the retarder in place.
5. Carefully lift the retarder out of the machine and discard it.
6. Install the new retarder by aligning it with the rollers and securing it in place with the screws or fasteners.
7. Replace the paper tray and any other parts that were removed during the process.
8. Plug the machine back in and turn it on to test that the new retarder is working properly.

Note: Before performing any maintenance or repairs on your RISOgraph, consult the machine's manual for specific instructions and precautions.

Question edited for clarity.

Riso rp 3700 t01-520 message - Copytechnet

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Jan 26, 2009 - Re: Riso rp 3700 t01-520 message. First try doing a reset, make sure the drum is back in, turn off the riso, hold the reset key while turning on ...
Missing: RP255, ‎' Must include: RP255,

Serviceman-Call Errors - Riso RP-255 Technical Manual ...

https://www.manualslib.com > ... > Technical manual
Riso RP-255 Manual Online: details on panel messages, Serviceman-Call Errors. 1. Serviceman-Call Errors Error Type T01 [Main-Motor Lock] T01-*** !!System ...


https://www.google.com/search?q=Risograph+RP255%2C+T01-520+system+error

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Wrong section...

Which model of Risograph?
Error type A01: Master mis-feedError point 201: Master-positioning sensor does not go to ON even after the write pulse motor is activated durcing the paster-positioning, master cut, or master-loading operation.
Try this:1) Pull out mastermaking unit and rewind master roll, then re-set master in place.2) Check write pulse motor and its gear

Pls, I have risograph FR3950EP
I need the full drum unit, computer interface card, master and inks of different colours. Kindly help me out. I am in Nigeria.email: [email protected]

Check the Power PCB ,maybe some fusies' ve blown

The master is stucked on the print drum,open print drum remove master and try again.
Let me know for futher help.

Check out copytechnet.com. Its a free service that covers copiers only. You can get in touch with a Risograph technician to give you the answer.

This is a cutter moter lock. you would have to replace the cutter unit.