Someone gave me a Dell color laser printer (3010cn), supposedly because it wouldn't work with Windows 10. When I set it up, it seemed to be working (it printed 1 test page just fine).
The next time I tried to use it, it diagnosed itself with error 004-321 and demanded that I "restart printer reseat drum contact support."
I followed this guide as closely as I could:
http://www.dell.com/support/article/us/en/19/SLN153697It boils down to reseating the drum, cleaning some belts and sensors, and if that doesn't work:
- Run the IBT rotation sensor diagnostic
- Remove the drum and run the photoreceptor motor diagnostic
- Replace the drum and run the photoreceptor motor diagnostic
The printer passed all 3 diagnostics but still gives the same error. The troubleshooting guide says I should now contact support, but Dell doesn't support this model.