PPI-4100AM schematics

[orbanp]

Hello Everyone,

Looking for the schematics of the Precision Power 4100AM amplifier.
The amplifier came with a car and needs repair.
I only found the user manual on the PPI site.

Thanks, Peter

[Perry Babin]

What's wrong with the amp?

[orbanp]

Probably something in the switching PS part. The amp does not turn on. Visibly, I can not see any blown components.
Do you have a schematics to share?
I did e-mail to PPI but they never bothered replying.

Thanks, Peter

[Perry Babin]

I don't have a schematic for this amp. I'm assuming that it's like the 4200AM.
http://ampguts.realmofexcursion.com/PPI_4200AM/

Post the DC voltage on all 16 pins of the power supply driver IC (likely an SG3525).


Pin 1:
Pin 2:
Pin 3:
Pin 4:
Pin 5:
Pin 6:
Pin 7:
Pin 8:
Pin 9:
Pin 10:
Pin 11:
Pin 12:
Pin 13:
Pin 14:
Pin 15:
Pin 16:

[orbanp]

Hi Perry,

I did see those pictures while I was searching for documentation on the amp.
Mine looks similar, though less power transistors on the sides, it is only 4x25W.
The PCB silkscreen says that it is a PPI 4030 Rev x board. (Don't remember which revision it was.)
I also did find the documentation on the SMPS controller chip, that also should help.
I just hoped that the schematics is available somewhere, and that would make life a lot simpler.

Thanks, Peter