So I have a JL Audio that simply keeps power cycling, drawing 2a., then 0 and back again. I pulled all the outputs first and they all test good. So I'm stumped as to what would cause the Amp to fail the start up check.
The first thing to check on these are broken legs on the rectifier then on the other heatsink mounted components.
Is this directly connected to a high-current power supply without a limiter?
Do you see any DC on the speaker output terminals?
Does it pulse with no outputs in the amp?
Do you see any DC on the speaker output terminals?
Does it pulse with no outputs in the amp?
No limiter, outputs are removed from the amplifier and it powers up fine. Draws about 2amps of current.
When the outputs are installed with or without rectifiers the amps just 0-2amps over and over.
When the outputs are installed with or without rectifiers the amps just 0-2amps over and over.
I haven't worked on many of these. Do they give you 15 seconds of low-voltage supply operation if you pulse the remote on for a second?
If so, do you see drive on the gate pads for the outputs?
If so, do you see drive on the gate pads for the outputs?
For some reason the amplifier won't start or come out protection if the outputs are installed. What commonly fails on these output driver cards?
Or is there a way to. Disable protection?
Or is there a way to. Disable protection?
Is pin 10 of the 3525 being driven high when the amp goes into protect?
I didn't see a lot of these but for the ones I did, I never had anything fail on the driver boards.
I didn't see a lot of these but for the ones I did, I never had anything fail on the driver boards.
Cab 1600.1d help in output section.
. Ok so I repair drive. Change out the sn74hc02's on the driver card along with the driver transistors 2n4401-03, voltage regulators are all perfect but the output mosfets still explode. I assume this has to do with the timing of the turning on and off of the high and low side transistors. What is responsible for this?
. Ok so I repair drive. Change out the sn74hc02's on the driver card along with the driver transistors 2n4401-03, voltage regulators are all perfect but the output mosfets still explode. I assume this has to do with the timing of the turning on and off of the high and low side transistors. What is responsible for this?
