Hifonics BXI 1206

[S Merlington]

Got another one of theese amps in..

I replaced the power supply fets and outputs..

I also replaced all of the 1D and 2D transistors on the audio driverboard..

And replaced the A1220A and the C2690A transistors..

If i try to pwer the amp up it goes into protection mode if i pull the audio driverboard the amp will power up..

Any ideas?

 

[S Merlington]

See post above ..

could the problem be in the power supply driverboard or is it most likely in the audio section?

 

[Perry Babin]

Are you sure that this is a 1206? It sounds more like a 1606 (4 audio drivers) or a 2006 (8 audio drivers).

 

[S Merlington]

Heatsink says BXI 1206D

It has 4 drivers on the main board..

and 3 P2D transistors on the audio driverboard

 

[Perry Babin]

OK. I've never seen a 1206 with that board but it would not be the first time that they've used different boards for the same model.

The TL072s on the board have caused some protection problems.

Are you sure that you didn't damage any vias when you pulled the audio driver board to replace the transistors?

If you replaced them without pulling the driver board, are you sure that you don't have any bad solder connections or bridges? It's difficult to see all connections if you don't pull the driver board.

 

[S Merlington]

Yeah didnt damage any pads or Vias i will replace the tl072's and see if that is the problem..

 

[S Merlington]

Replaced them amp powers up now Thanks for the help..