Hifonics BRZ1700.1D No Output

[crazyboi311]

so I can use the IRF3205 FETs as a viable replacement along with 47ohm gate resistors and the drivers as BD139 and BD140. When I switch out the drivers, where do each of the drivers go? such as BD139 to Q7 or Q8? BD140 to Q7A or Q8A?

 

[Perry Babin]

The BD 140s go in the locations where you read 0 ohms between the center leg and the ground terminal of the amp.

I'd strongly suggest replacing ALL power supply FETs (12 FETs).

 

[mbates14]

make sure your output transistors arnt shorted first?

 

[crazyboi311]

Okay so this is to follow up on everything. I just got a new dmm in and did testing to the rest of the power supply FETs and all of them tested as 0 ohms or about .5ohms then floating to another number. The resistors all had a weird number such as 23 ohms and only two of them read as 46 and 47 ohms.

I did testing to all of the output FETs and they all read the same which was about 33.1-33.4 ohms. I guess those are fine?

I ordered all of the replacement power supply FETs as Perry recommended and the drivers as well. I will update as soon as I get them in.

Thanks for all of the help!

 

[Perry Babin]

Without knowing precisely where the probes were placed, it would be difficult to determine what they mean.

 

[gpapag]

uncletaylor's http://www.diyaudio.com/forums/members/uncletaylor.html post has been moved

http://www.diyaudio.com/forums/car-...power-protect-light-no-sound.html#post4909449

George