C309a Service Manual, Exploded diagram
I’m pretty handy with repairs. But a Service Manual, and/or an exploded diagram of the HP C309a would really help.
HP Photosmart Premium Wireless All-in-one Color Inkjet Printer/Fax/Copier/Scanner introduced 2009.
At the far right of the cartridge carrier track, there is a biuld-up of black, tar-like gunk. I fear it may be interfering with the printer’s ability to align the print heads. Mainly I just want to give the printer a good cleaning, without damaging anything.