There are all sorts of problems that you could have with the drive circuit but I don't see any. The drive at the output transistors looks OK. I'm assuming that the drive to the other two banks is OK as well.
Did you try powering up with a limiting lamp in the rail supply lines?
Did you try powering up with a limiting lamp in the rail supply lines?
Did you install the resistor?
As the amp is now, what's the DC voltage across the speaker terminals? No load.
As the amp is now, what's the DC voltage across the speaker terminals? No load.
It’s almost like it’s trying to share the voltage with banks but cycles in and out of protect. I will go back through the driver circuit and double check I didn’t make a mistake
You're losing drive because there's too much DC offset. That may indicate that there is some leakage in the output stage (contamination, leaky output).
Did you try inserting a 120v lamp in the rail supply lines to see if it would more fully power up?
You can try the lamp in the speaker terminals as well. It will be a load but a much lighter load that may allow the amp to power up.
Did you try inserting a 120v lamp in the rail supply lines to see if it would more fully power up?
You can try the lamp in the speaker terminals as well. It will be a load but a much lighter load that may allow the amp to power up.
I rebuilt the driver circuit this morning. I didn’t rebuild it initial because I didn’t see any bad components. When I power the amp with hv the is just cycling in and out of protect.
Rockford 30001 FET soldering
Wow, by sheer coincidence I was surfing for info on a 30001 and found a post from 2 days ago.
I love this forum.
Short of buying a reflow oven, any suggestions on un/soldering output and supply FETs from the boards.
Thanks
Jim
Wow, by sheer coincidence I was surfing for info on a 30001 and found a post from 2 days ago.
I love this forum.
Short of buying a reflow oven, any suggestions on un/soldering output and supply FETs from the boards.
Thanks
Jim
Please don't post in a repair thread that was started by someone else unless you are trying to help them.
Start a new thread if you need help with a repair of your own.
Start a new thread if you need help with a repair of your own.
I placed a 120v light bulb across outputs and amp still did the same thing rail voltage up to 110v on 2 banks and the amp trips protect voltage drops to about 55 and back up to 110v. The amp continuously does this. Maybe I damaged one the outputs heating the mesha board too long at 450 with hot air from the bottom. Not sure I did notice that 2 banks would intermittently on diode check at 0.255 and then sometimes would diode check at 0.475v. This was teste with both driver circuits removed. But can’t verify that theory with old pulling the mesha boards.
When the amp is shutting down, it drives half of the FETs 'on' to control them and prevent a turn'off pop. That drive voltage doesn't immediately drop to 0v so, just after the amp shuts off, they can read as a direct short.
Did you try the lamp in the rail supply lines?
Did you try the lamp in the rail supply lines?