Headunit sending DC voltage?

[BobTheSlob 10+ year member]

I have a Cadence amp. Recently, the "Diagnostic" light turned on. The manual says that if the "Diagnostic" light is on, then there is either

"A short in the RCA cable or your headunit is sending DC voltage to the amplifier". Why would my headunit send DC voltage? How can I fix this?

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[hihoslva 10+ year member]

I'm pretty sure a hard-clipped signal is DC voltage.

Did this happen when you had the deck cranked way up? If so, you might have sent a clipped signal to the Cadence. Nice that it has such a protection feature.

Otherwise, check them RCAs. Shorted, crimped, or cut RCAs are really common - you might have just snagged it or pinched it on something - or even damaged one of the connectors and caused a short.

~HH

 

[BobTheSlob 10+ year member]

I replaced the RCA cables, and it still doesnt work. I bought a Voltometer, checked the ground wire, and made sure there was no voltage going through it. I made sure there was voltage running through the remote wire and the power wire. STill doesnt work.

 

[BobTheSlob 10+ year member]

This needs a bump. There is around 50mV going through the ground wire, 14.4V going through the power, remote, AND the RCA cable.

Why is the RCA cable doing this? I've replaced it twice, so it's not the cables.

 

[BobTheSlob 10+ year member]

Originally posted by Jmac Because the pre-outs on your head unit are ****ed ?

Could that actually be the reason? Can I replace a fuse or something?

 

[taylor 10+ year member]

TAKE IT IN:banghead: fuses only protect against over current on main power etc.