Xerox 242 Yellow band running horizontally

Hi All
I have a problem on my Xerox Docucolor 242. I have a yellow band running horizontally across the page when printing A4 LEF. I have run the job A4 SEF as it was urgent. The yellow started to get lighter in density but I managed to complete the job.

I have now tried printing SRA3 SEF with a lot of toner coverage and there is no yellow at all on the job. just a few blobs of yellow in non image areas.

Cheers Dan

 

All sorted it was a developer issue, replaced developer and the latex/plastic cover over the developer housing opening this had perished and got into developer.