Newbie question

[relative4]

I just bought an old car with a modern stereo, a Panasonic CQ-C1300U if it matters. The stereo turns on and reads CDs. However, it makes no noise at the speakers. Any time the stereo is on, there are 12-13 mV and 5-6 mA, steady, at the speakers. No voltage or current when the stereo is off. I attached a known-good speaker and got no noise.

Can anyone explain how to continue the diagnosis of this problem?

Thanks!

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[dman4486 5,000+ posts]

define old, and what kind of car?

 

[relative4]

1980 Mgb

 

[dman4486 5,000+ posts]

1980 Mgb

i am going to guess it is in the wiring...if the unit turns on, and there is no external amp attached, then somewhere between the unit and the speakers....remove the Hu from the dash, and connect a short wire from it to a speaker and see what happens, or measure with a dmm to see what output voltage is there

 

[relative4]

It failed that test, so looks like the internal amp is bad. Time for a new unit. Thanks for your help!