I have the same printer too and it stopped working 2 months ago. Unfortunately I don't have the time disassemble and repair it. Still one of the best A3 size printers around and will be fixing as soon as I have some free time to do so.
Originally Posted by Snapshot9
I would suggest searching Google for the HP1220C Service Manual to troubleshoot the printer.
"Believe me! The secret of reaping the greatest fruitfulness and the greatest enjoyment from life is to live dangerously!"
Friedrich Wilhelm Nietzsche