D20,D21,D22 anf D23. I can't even make out what is on the diode, if I had to guess C001.?? On input side rail, all the fets are only reading on middle leg. Gate-Drain-Source, only getting an actual reading on Drain pin??
It's best if you don't refer to anything as 'rails' except for power supply rails. Either the ± rails that feed the output transistors or the low voltage regulated rails that feed the op-amps and such.
Photos save a lot of time and cost nothing.
The hifonics amps that are similar to this one use FR154 diodes to supply voltage to the 12v regulators.
Photos save a lot of time and cost nothing.
The hifonics amps that are similar to this one use FR154 diodes to supply voltage to the 12v regulators.
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So those Diodes due tend to fail alot? And I will take pics of entire board and circle the fets that are not reading in spec .
You can't check much of anything definitively unless you remove it from the circuit.
Those diodes have never failed in any amp that I've had in for repair.
Those diodes have never failed in any amp that I've had in for repair.
There was a broken resistor. Got it going yesterday, but when I unplugged hot, ground and remote, the ends were hot to the touch? Any ideas? Or you think it's in the power supply??
Oh and it was a bad transistor and diode on the tiny tiny driver board thingy. I had to unmount it to remove bad compents.
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