What is a e021 error?

This error code might apply to different devices or equipment, including printers, copiers, or other electronic devices. Please note that the troubleshooting steps may vary depending on the specific device you are using.In general, an E021 error code could indicate the following issues:

1. Paper Jam: The most common reason for an E021 error is a paper jam inside the device. Open the appropriate panels or compartments and carefully remove any jammed paper.
2. Sensor Issue: Some devices have sensors that detect paper movement or other functions. If a sensor is dirty, blocked, or malfunctioning, it could trigger the E021 error. Inspect and clean the sensors if possible.
3. Mechanical Problem: There might be a mechanical issue preventing proper operation. Check for any broken or misaligned parts and perform necessary repairs.
4. Firmware or Software Error: In some cases, an E021 error could be caused by a firmware or software problem. Check for available updates and try resetting the device to its default settings.
5. Electrical Issue: Electrical problems, such as power fluctuations or faulty connections, could also lead to error codes. Ensure the device is receiving stable power and check all connections.
6. System Overload: If the device is being used heavily or for extended periods, it might encounter an E021 error due to internal stress. Allow the device to cool down and reduce the workload if applicable.

To resolve the E021 error, I recommend the following general steps:

1. Turn off the device and unplug it from the power source for a few minutes.
2. Check for any visible obstructions or jams, such as paper or debris, and remove them carefully.
3. Restart the device and see if the error persists.
4. If the error continues, consult the user manual or contact the manufacturer's support for device-specific troubleshooting steps.

hello,
this is error for the faulty developing rotary mechanism ( the mechanism that rotates the toner units ).

As remedy, you can try to check for broken parts, check if the motor turns the rotary assy, ... or call service!

Hope that helps!

May 8, 2006 Product : imageRUNNER C3100 / C3170 Title : E021-000x Error Code Error :
E021-000x Error Code: Developing rotary does not rotate and abnormal noise comes from motor.

E021 can be displayed when an error occurs in the developing rotary.
The detail codes are:
0001: The developing rotary home position cannot be detected.
0002: The intervals of flag detection during rotation is too short or long.
0003: The sensor does not detect the flag when the developing rotary stops at development point

As a result of inspection, it was found that the DC Controller PCB was unable to control the motor because it was faulty.

Workaround :
1. Check whether or not the developing rotary receives any physical load.
Rotate the developing rotary in a counterclockwise direction by hand to see whether it rotates smoothly. If any abnormality is found, eliminate the root cause. No problem is found, go to the Step 2.
2. Make sure that the connectors are securely fitted between J313 on the DC Controller PCB and the Rotary Motor (M8) or there is no pinched wire. No problem is found, go to the Step 3.
3. Replace the DC Controller PCB with a new one. If the symptom still recurs, go to the Step 4.
4. Replace the Rotary Motor with a new one.
DC Controller PCB: FG3-3846-030
Rotary Motor: FM2-0080-000 Canon USA, Inc. Systems & Technical Support Division

I think that E021 is caused by the rotating unit not rotating or the sensor that detects the rotation is not working. check to make sure that all the colour units are in correctly and not stopping the rotation or maybe something else obstructing it.

In my office this error message E021 came up today,too. So I called customer service to solve this problem.Operator advised me to shut off the power suply with pull out source plug about 5 minutes,after that, put plug in socket again.
If error message E021 still comes up,it needs repair(fix) by cannon support because of breakdown.
gambatte!!(^^)/

E021 = DEVELOPING ROTARY MOTOR FAULT
Please check the connector of the developing rotary motor.
Maybe you will need to replace the DEVELOPING ROTARY MOTOR or DC CONTROLLER PCB ASSY.

Hi,
In my home office this error message came up, E021. I opened the Printer cover, closed it, unplugged and replugged and got a Paper Jam message. I removed the paper jam and did the cover/plug routine. Now I have a message CHECK PRINTER OPEN AND CLOSE COVER. But I can't find anything wrong! I have been searcing for an explanation of the error message online, but haven't found that either. my printer may be infested by aliens.
The best advice I can give is to reseat the various parts (drum and toners).

Thanks

Make sure you have the developers correctly installed ... E021 means you have a rotary error.....

I believe that is a dirty sensor error message.


E021. Transfer Belt Cleaner Contanct/ Rease Problem.
Cleaner pressure flapper solenoid, Belt cleaner detect sensor, engine PCB.

E008. Is a Main Motor Problem.
Main Motor, Engine, power unit

E021. Transfer Belt Cleaner Contanct/ Rease Problem.
Cleaner pressure flapper solenoid, Belt cleaner detect sensor, engine PCB.

Make sure inside on unit, has no toner spilled in it.