I had really bad alternator noise on my Z1, previous owner of my vehicle/z1 had shorted something on install and had put in the hack of grounding the rca wires, but I was still getting some static. I sent in my unit to Pioneer, they said there is a standard $200 repair fee for this model. I got the unit back pretty quick, i believe it was just under two weeks including shipping time. The problem was totally fixed and i undid the rca ground hack. The paperwork from Pioneer said the fix was just a fuse! (part number CEK1260). I looked up the part number on Pioneer's website and they list it