Anybody help with F5?

yammy1688 · 25th October 2008, 07:32 AM

I blew the left channel with to much gain from my preamp, on accident of course

Is anybody out there willing to help me get this guy fixed? The imaging is suffering just a tad with one speaker running

cviller · 28th October 2008, 11:58 AM

Post some measurements and tell us what you have done. That way someone might get some clues and will be able to help you.

Probably the best thing you can do is to measure voltages on as many nodes and write them in the schematics and upload that here.

If you just want to start swapping components, I would suggest you start with the small active elements (jfets and diodes) first. If your heatsink was too small, then you should swap the output transistors too.

AMV8 · 28th October 2008, 03:50 PM

Hi

If you look at the pcb of the damaged amp can you see any smoked or damaged components? Possibly output devices or resistors?

Don

25th October 2008, 07:32 AM	#1
yammy1688 diyAudio Member Join Date: Oct 2008	Anybody help with F5? I blew the left channel with to much gain from my preamp, on accident of course Is anybody out there willing to help me get this guy fixed? The imaging is suffering just a tad with one speaker running

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28th October 2008, 11:58 AM	#2
cviller diyAudio Member Join Date: Dec 2005 Location: Copenhagen Blog Entries: 2	Post some measurements and tell us what you have done. That way someone might get some clues and will be able to help you. Probably the best thing you can do is to measure voltages on as many nodes and write them in the schematics and upload that here. If you just want to start swapping components, I would suggest you start with the small active elements (jfets and diodes) first. If your heatsink was too small, then you should swap the output transistors too.

28th October 2008, 03:50 PM	#3
AMV8 diyAudio Member Join Date: Jan 2005 Location: near london	Hi If you look at the pcb of the damaged amp can you see any smoked or damaged components? Possibly output devices or resistors? Don