I wouldn't have expected it to survive since the supply voltage would have been reversed. You can try reinstalling it.
I’ll see if I can find a new one in my parts I have here if I find one I will install it and post back
I used one of the old ic’s . The outputs board is out of the amp right now .
Do you want the voltages with it out or just the voltages when the output board is installed ?
Do you want the voltages with it out or just the voltages when the output board is installed ?
I replaced R9 and installed the output board .
I noticed the following outputs getting hot Q2006,2007,2008,2009.
The whining came back from the transformer .
Do you need the voltages on Q2000,2010 ect now ?
I noticed the following outputs getting hot Q2006,2007,2008,2009.
The whining came back from the transformer .
Do you need the voltages on Q2000,2010 ect now ?
I'd desolder and lift the center leg of the rectifiers and check the drive signals with no rail voltage.
If I remove the output board from the amp . The whining goes away from the transformer and the outputs remain cold . I’m wondering if one of the ic’s is defective . I guess I’m gonna have to order new ic’s again and see if that fixes the issues .
Also I noticed that for a second I had very low audio then it went away . So I’m guessing something on the output board is still defective
Also I noticed that for a second I had very low audio then it went away . So I’m guessing something on the output board is still defective
If I solder the output board back in disconnect the rectifiers do I need to do anything else to check the drive in the outputs ?
If you're repeatedly installing the driver board, using jumper wires (as shown below) will likely be a better option. Search eBay for 'Arduino breadboard jumper wires' to find jumpers that are easy to work with.
I can't tell you that you absolutely won't need to do anything else.
I can't tell you that you absolutely won't need to do anything else.
Attachments
Confirm that there is no voltage on the source leg of the FETs.
Connect the scope ground to the source leg. then recheck.
Connect the scope ground to the source leg. then recheck.
I’m gonna have to order new ic’s for the output board . No change in drive signals . Also the amp will power up and after 3 secs go into thermal protection and repeat the cycle . If I remove the board the amp remains on and idles fine
I replaced all of the ic’s on the output board and reinstalled it . The voltages on the regulators is still not correct something is dragging the voltages down .
where do I go from here
where do I go from here