QuestionQUESTION: i am working on a corporate jet, it has a dvd player that goes to an audio/video controller and then an amp>speaker. it has no audio at the speaker and i am trying to eliminate the possible cause and was wondering if ,by checking a voltage or resistance on the output side of the amp if i could figure it out.
ANSWER: I need more information. Specifics like manufacturers and model numbers, how many speakers? It's probably 12v car audio. If not I can give you some simple directions to troubleshoot it. If it's car audio it is proprietary because of the connectors. I would need to know how many connectors, type and number of contacts. You can easily check to see if the speakers are ok by disconnecting the leads and putting a 9V battery across the terminals to see if the cone moves.
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QUESTION: its 28vdc input power for the A/V controller,i believe the amp to be faulty, but just needed to see what type of output i will get if i hook a meter up to the audio out high/low leads
Answer28vdc is not a common B+ supply voltage. The question is, is the power differential. Is there a +28v and -28v supply. Normally I am accustom to seeing a 24vdc B+. Your question though, is a little like asking me to guess what color the jet is. There is a plethora of equipment that can be used. Is the controller a Crestron, AMX or are we talking about car audio?
The output of an amp will show impedance not resistance. Do you have an impedance tester? The output signal of the amp should be AC not DC and it's signal will be proportional to the input. If the speakers are not working why would you think there would be a voltage. Futhermore if there is DC on the output then you have shorted output devices. I still think that a speaker test is far more revealing.
