Rockford Fosgate Punch 160.2

[S Merlington]

Is it D203 and D205 that disable's the protection in the right channel??

Or does anyone know which 2 i lift to disable it??

Amp has distorted output on the right channel

 

[seankane]

Has the amp been previously repaired or is this how it came to you.

Just want some info before stating the obvious.

 

[S Merlington]

It had blown power supply fets with i changed ..

It also had both 540's blown in both channels which i changed along with the drivers for the outputs..

 

[S Merlington]

The right channel wont bias..

So its a bias issue..

I switched the MPS6521 I also switched Q208 and Q218..

with no luck..


where do i go from here?

 

[seankane]

If you don't have any shorted or open source resistors or if you did, you must have some damage in the protection circuit.

I am assuming you metered the resistors in the area around the blown outputs?

Check the 1A and 2A transistors as well.

If there is a fault sometimes the bias wont set properly.

What resistance do you get from source to drain on each of the outputs?

Its likely a shorted diode marked 5D.

 

[Perry Babin]

If it's the same as the 160a2 (see photo), it's D202 and D204.