pioneers ground??

wrap bare wire around the preouts and ground them to a screw on the back of the unit.

There's a pic of it on here somewhere. Too lazy to look. might be in the ground loop fixes section/

Edit: here it is.......http://www.caraudio.com/forum/showthread.php?t=198477

 
well they must have just fixed it, cause i brought 1 back in september and had to ground my rcas

I doubt that, I bought a 600UB about 2 or 3 months ago, and it didnt have it at first, then it happen all of a sudden. But I cant blame Pioneer, it was my fault, quick install, and a wire got loose and grounded itself. But any other HU would have been fine, its just a very weak point on the Pioneers. The wire around the RCAs works wonders though, fix the prob easly.

 
i think an onboard fuse burns out and that fuse grounds the rca's... i read it somewhere awhile back, but its a fuse thats like .123354 of 1 amp or something... the best route is just wrap the wire around or throw it away and get something more reliable... my pioneer just **** on me today, and its going bye-bye.

 
Funny thing is I've been running Pioneer decks for more than 15 years now (including cassette decks) and haven't had ANY pre out issues. Not only that MOST of my friends run Pioneer and don't have problems either. Can't understand what is going on with all these units.

 
Funny thing is I've been running Pioneer decks for more than 15 years now (including cassette decks) and haven't had ANY pre out issues. Not only that MOST of my friends run Pioneer and don't have problems either. Can't understand what is going on with all these units.

Try plugging your RCA's in with the deck powered...//content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

 
i still cont get me and my supervisor erik reed and we cant figure it out whats goin his alpine is doin it a lil but not as much as my pio was... i just dont trust da whole wire thing

 
It's not a hard fix, I did it myself with the help of a soldering iron, a 1/4" of 22ga wire, and a magnifying glass.

Search the DIY forums, there are pictures on how to do it. Basically pull apart the deck, remove the circuit board, and unsolder the pico fuse. Then solder in a piece of wire. The correct thing to do would be to install a new pico fuse, but I couldn't find any and as long as your system is wired correctly you won't hurt anything without the fuse.

I tried grounding the RCA's, the HU chassis, and it did take the noise down, but not away. The only way to fully eliminate it was to replace the fuse, which isn't hard as long as you have a steady hand and a little mechanical knowledge. You can get it done with the circuit board in the chassis, but it limits your workspace.

 
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