Hi Taga,
I understand you have a Deskjet 3050A that is producing poor print quality. I'm sorry to hear this, but I will absolutely do my best to assist you!!
I would recommend that you start with following this Troubleshooting Print Quality Issues document and hopefully it can get your print quality to improve. I would also suggest that you plug the printer directly to a wall outlet to ensure it has all the power it needs to function correctly.
Hope this helps, have a great day!!