Fix Kyocera Error C7990: Waste Toner Full
warning Severity: warning
If your Kyocera printer is displaying error C7990, do not worry – this is a known issue with a proven fix. This error typically indicates waste toner full that can usually be resolved without a service call. Follow the steps below to clear this error.
What Causes Kyocera Error C7990?
This error can be triggered by one or more of the following issues:
- Waste toner container is full
- Waste toner sensor triggered
- Waste toner mechanism jammed
How to Fix Kyocera Error C7990
Follow these steps in order. After each step, check whether the error has cleared before proceeding to the next one.
- Step 1: Locate the waste toner container — on ECOSYS models it is typically behind the front cover
- Step 2: Remove the full waste toner container
- Step 3: Install a new waste toner container
- Step 4: Close the cover — the printer resumes automatically
- Step 5: Dispose of the used container properly
Affected Kyocera Printer Models
The following Kyocera printer models are known to display error C7990:
- Kyocera ECOSYS P2235dn
- Kyocera ECOSYS M2540dn
- Kyocera ECOSYS M5526cdw
- Kyocera ECOSYS P5026cdw
- Kyocera TASKalfa 2553ci
- Kyocera ECOSYS M2640idw
- Kyocera ECOSYS P2040dn
- Kyocera TASKalfa 3253ci
Related Kyocera Error Codes
If you are troubleshooting error C7990, these related error codes may also be relevant:
- C6000 – Drum Motor Error
- C6400 – Fuser Motor Error
- C7990 – Waste Toner Full
- CF040 – Color Registration Error
- J0511 – Paper Jam – Tray 1
Frequently Asked Questions
What is Kyocera error C7990?
Error C7990 indicates the waste toner container is full. Excess toner collected during printing has filled the container and it must be replaced.
Where is the waste toner container on a Kyocera printer?
On ECOSYS models, the waste toner container is typically accessible behind the front or side cover. On TASKalfa models, it is usually on the left side. Check your model’s manual for the exact location.
Error still not resolved?
If the steps above did not fix the error, the issue may require professional service. Contact the manufacturer support line or visit an authorized service center near you.