I’ve recently repaired this amp but I find an occurrence I want to confirm, IRFB5620 are the output and a cross of IRFB4227 was referred as sub, after installed they got hot and no drive waveform, I swapped to another working channel and still warmed. Nothing else was damaged in the amp just one bad output. It was when I purchased the IRFB5620 then the amp worked.
Another puzzling problem is whenever I pulled the output from any one channel, the adjoining channel won’t produce any waveform regardless of four “independent seeming” channels (that is 1 or 2 and 3 or 4). Therefore, if one channel goes bad there is no three channels (like class AB) even if you remove the damaged outputs and free up voltage rails.
Can someone explain?
Another puzzling problem is whenever I pulled the output from any one channel, the adjoining channel won’t produce any waveform regardless of four “independent seeming” channels (that is 1 or 2 and 3 or 4). Therefore, if one channel goes bad there is no three channels (like class AB) even if you remove the damaged outputs and free up voltage rails.
Can someone explain?
They are IRS2092S, but two channels will work on the opposite side of any channel I remove output or drive IC (with led flashing, protect/warning) but the untouched adjoining channel won’t work.
I don't have that diagram but on a similar amp, there are two channels together for a protection circuit. If this is the same, it would explain why two channels work and 2 are in protect.
The ICs will go into protect mode when the outputs are not in the circuit unless you jump through a few hoops. Do original FETs run cool in all locations?
The ICs will go into protect mode when the outputs are not in the circuit unless you jump through a few hoops. Do original FETs run cool in all locations?
Yes, I had time to “play” with the banks. I had this same problem but I didn’t detail it on a Soundstream you helped me fix where the MCU was bad and I ran the power FETs direct with an installed driver board. IRFB4227 runs hot, no sound but when used IRF640 2pcs it ran cool and produce audio. I’ve never known the originals as they were scruffed and just remarked “H6” that amp still plays.
I've never known Taramps to deface parts. I guess that changed.
What are the gate resistors?
This may be the same diagram you're using.
What are the gate resistors?
This may be the same diagram you're using.
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