Rockford Fosgate 1001bd

[caraudioguy2100]

I can’t seem to find out where the ground is broken to pin 15 I’ve checked pretty much everything .

 

[Perry Babin]

It connects to terminals 6 and 7. Do you read 0 ohms to those terminals?

 

[caraudioguy2100]

No

 

[Perry Babin]

Try adding a jumper on the bottom of the board.

 

[caraudioguy2100]

Do you have a schematic for this amp ?

PC-3125-F

Or do you know what board locations are the pnp drovers for the power supply ?

Since they do not go to ground either so somewhere I have a break in the ground and wanna track down the issue .

The collector of the pnp drivers should connect to amps ground terminal but they aren’t

 

[Perry Babin]

See attached.

 

[caraudioguy2100]

From pins 6,7,15 of the 3526 to amps ground terminal I should get something like 0.4 ohms correct ?

Right now I’m getting 2k ohms

 

[caraudioguy2100]

Ok I found the break in the ground connection to pond 6,715 fixed the connection

The pnp drivers should also be directly connected to ground amp correct ?

 

[Perry Babin]

The collectors of the PNP drivers should be connected to ground.

 

[caraudioguy2100]

Ok I found the issues and fixed the solder connections I will put new drivers in the amp and the fets back in and see what I come up with

 

[Perry Babin]

Remember to check the drive, initially, with no B+.

 

[caraudioguy2100]

Here is what I get on the gate leg of the fets after I fixed the ground issue .

Scope set to 5us 5volts/div

 

[Perry Babin]

That looks OK. Confirm that it's also good at the gate leg of each of the FETs.

 

[caraudioguy2100]

Power supply is working correctly now .

Next problem I have is Q15 and Q16 regulators get to hot to touch within 10 secs of powering the amp up .

 

[caraudioguy2100]

Found the issue .

One of the MIC4420’s were shorted