Tweet
Good night friends, I have a JBL PRX715 which is not amplifying but at times when I set the volume control to a minimum and raise it, a little volume usually comes out and it goes down completely after 2 seconds, staying on and showing me the signal indicator like qee if there is audio input signal.
Check the Amplifier stage (Without input audio signal) where there are 4 mosfets divided into 2 groups of 2 of these and in one group 70V is arriving and in the gate there is 4V but in the other group there are no gate voltages and I am suspecting one of the IRS20957S because where there is 4V in gate, its input is 1.8V and in the IRS where there is no output Gate voltage, more than 4V appears in its input.
If any colleague could help me by providing me with the diagram or voltage data of the circuit, I would greatly appreciate it.
I attach photos and some measurements that I could do
Thanks friends.
imagen 1
imagen 2
imagen 3
Check the Amplifier stage (Without input audio signal) where there are 4 mosfets divided into 2 groups of 2 of these and in one group 70V is arriving and in the gate there is 4V but in the other group there are no gate voltages and I am suspecting one of the IRS20957S because where there is 4V in gate, its input is 1.8V and in the IRS where there is no output Gate voltage, more than 4V appears in its input.
If any colleague could help me by providing me with the diagram or voltage data of the circuit, I would greatly appreciate it.
I attach photos and some measurements that I could do
Thanks friends.
imagen 1
imagen 2
imagen 3