Help me fix Hifonics brutus BXi1206D

[Cletus]

number one is the far left then moving to the right

1)
leg 1-2 .638m
leg 1-3 521
leg 2-3 .555m

2)
leg 1-2 .798
leg 1-3 520
leg 2-3 1.673

3)
leg 1-2 .757
leg 1-3 520
leg 2-3 .890

4)
leg 1-2 .752
leg 1-3 512
leg 2-3 1.053

5)
leg 1-2 .849
leg 1-3 513
leg 2-3 1.020

6)
leg 1-2 .844
leg 1-3 513
leg 2-3 1.007

 

[Cletus]

Better picture after I removed the clips on the first side

An externally hosted image should be here but it was not working when we last tested it.

My clip removal tool lol

An externally hosted image should be here but it was not working when we last tested it.

 

[Perry Babin]

Those appear to be OK.

There's a good chance that 2 of the surface mount transistors on the driver board have failed (in yellow rectangle in attached photo). Do you think you'd be able to replace them?

 

[Perry Babin]

Reinstall the clips. Do not pull the FETs away from the heatsink.

 

[Cletus]

Will do. I can take it to my dads friend that has the proper equipment to solder those correctly.
He's got a scope he can do it under and such.
Any way to order these online or a part number that i cant try and do some searching for?

 

[Perry Babin]

MMBTA42

They can be replaced without disassembling the amp. Tell him to stand the amp on end to work on the board.

 

[Cletus]

Awesome. I'll get this done and then get back on.
Thank you so much for your help Perry!

 

[Cletus]

He replaced the two transistors and tested the old ones.
The old ones when removed and tested show .624 volts on both legs. Not sure if they are bad cause the new ones when tested have the same reading.

I'm gonna give it a go and see what happens.

 

[Perry Babin]

The Basic Transistor Testing page (link below) shows you how to test the FETs out of the circuit.

 

[Cletus]

Perry do you have a schematic for this amp?

If so could you email it to me
supercletus at gmail dot com

Thanks

Sent from my SPH-D700 using Tapatalk

 

[Perry Babin]

No. It's difficult to get schematic diagrams for hifonics amps.

 

[hakentt]

Perry whats your favorite Rockfort Fosgate monoblock amp and why?

 

[Perry Babin]

I don't have any favorites.

 

[seankane]

As many amps has Perry has repaired or helped repair he probably does not like any of them!! LOL

Lets re-word the question Perry, in your opinion which manufacturer(s) build a solid reliable amp if used as designed to be used and not abused?

 

[Perry Babin]

Sean, let's do this in a new thread titled something like best and worst amps and why. Since you have a lot of experience with amps, feel free to include your opinions.

 

[Blazzing Mucho Bass]

Perry I need help with one of this amps I pulled a rookie move I tested the transistors on the output side and all of them were bad I pulled some ifr9640 and irf640n and I'm trying to figure how Manny do I need of each? I pulled 8 of them and Idk if is 3 of the irf640n or 4 of each please help u can email me at streetlegal6982@gmail.com thanks