This amp has been in service for a couple years in my vehicle and was previously owned and in service. Recently the right front speaker volume was oscillating a little and had some static. Now that channel is not working at all. This is a 4 channel amp. Thanks, Scott
When there is intermittent audio or static, the first thing you should do is to operate all controls through their entire range while listening to the defective channel to see if it ever produces clean audio.
There is no sound at all at this point. I went through the entire range and cannot get it to produce sound anymore. This was in my wifes car and neglected to tell me when it started crackling. I think it's probably been doing it for awhile so now it seems as if it's finally failed completely. What should I check next? Thanks
Find the pin on U5/U6 that has signal on it when you drive a signal into the dead channel. If you can't find one for that channel. Drive signals into the other channels and find their signals. You're looking for signal on pins 3 and 5.
So i am showing my ignorance again, I m not sure how the pins count. Which pin has the square pad?
http://datasheet.octopart.com/NJM4562D-NJR-datasheet-135003.pdf
AC voltage. Drive the input with a strong signal, set the crossovers to flat and max the gains out. Place the black meter probe on one of the non-bridging speaker terminals.
AC voltage. Drive the input with a strong signal, set the crossovers to flat and max the gains out. Place the black meter probe on one of the non-bridging speaker terminals.
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