Jl audio m6450 power supply issue.

[rhempz01]

Ok so I received a jl in today for a power supply. I have drive showing at the gate pass for the mosfets. The rectifiers are out of curcuit. Yet if I attempt to put a mosfet into curcuit it heats up. I pulled the pnp drivers and tested them (in tester). I changed the 494as well. I could use a little help.

 

[rhempz01]

1

 

[Perry Babin]

What do the gate drive waveforms look like with the gate-source loaded with a 0.01 or similar value capacitor?

If nothing else failed, it may have a shorted transformer.

 

[Jakobsson]

Whats the function of the 4 diodes on each side of the capacitor bank?
No extra windings on transformer for another dc circuit?

 

[rhempz01]

I check the drive which capacitors in curcuit today. Do you know what the light emitting diode in d7 is for. It fails even a diode test and doesn't light. The other one in d2 is fine. Just wondering if it makes any difference.