Pioneer pico fuse symptoms. He stated that he had never heard that in the 30+yrs he's been apart of the 12v community and shop owner. Feb 19, 2013 · What happens is when the unit is powered on and someone disconnects the RCA's the fuse blows. its a RCA protection feature for the amp you're sending signal to. . This causes grounding issues on the RCA's/circuit board and produces a realm of noise problems ranging from buzzing to high pitch squealing noises. I was doing some mods to my enclosure and when I turned the headunit on. Oct 10, 2010 · In some way this fuse is apparently inline with the ground for all the RCA outputs. BAM!! Engine whine like crazy! This will be my third Kenwood screen in about a year that has suffered this fate, fortunately warranty is pretty easy for me. If you have pluggd/unplugged your RCAs with the radio powered on and playing music - this fuse is likely blown. Apr 28, 2010 · I was talking with my Boss last week and told him about the problems with Pioneer headunits and thier pico fuse problem. Pioneer units (almost exclusively) have a tiny pico fuse on the circuit board in the low level output line. Jun 13, 2012 · I've just had my new Kenwood screen suffer this fate. how to tell if your PICO fuse is blown. Dec 10, 2019 · Had to remove two boards and a snap in power switch to get to the underside with all the components, and found the heater fuse cracked in half. If you "hot swap" the rca's ( take out and plug in) the rca's while the unit is on, theirs a big chance you've damaged your pico fuse inside your pioneer unit. I have seen glass fuses blow and continue to conduct, hadn't seen the pico fuse version where it's just intermittent. hot swapping RCA's will blow this fuse. wpntzc lsve indm ccgzg iuqtfdirt xwus zcpz cmpn yguifr xzsjtm