HIFONICS bxi 1606d

[timwebb]

ok i have another one of these,the power supply is shot. what resistors and mofets would be good?
i read on another thread 47 ohms and IRFP064N just need to be sure thanks!

 

[Perry Babin]

What were the originals?

 

[timwebb]

FQP65N06 are the originals and 47ohm resistors

 

[Perry Babin]

FQP65N06

Mouser has the original parts.

The original is in a TO-220 package. The IRFP064 is in the TO-247 package so they're not interchangeable. I think there are two versions of this amp.

Have you checked the outputs?

Does it use the HIP4080 audio driver IC?

 

[timwebb]

yea everything is burned on this amp and it uses the HIP4080 audio driver.

 

[Perry Babin]

If it uses the IRF3710 outputs, order the Z version (IRF3710Z). Also order a new 4080.

Check the low value resistors and the large diodes near the 4080.

 

[timwebb]

i have some 3205 on hand will that work of testing till the new ones come?

 

[timwebb]

here's the board

 

[Perry Babin]

If you're going to install the 3205s, you may as well leave them. This drive circuit can handle the load. If you have a scope, check the drive signal on the gate pads for the power supply FETs before installing any new FETs.

 

[timwebb]

is it common for an amp to have diodes cause all the ones in this amp is are gone

 

[timwebb]

ok ive cleaned the amp off and the 494 is getting no power? on the bottom of the amp it has heat damage should i replace it?

 

[timwebb]

ok ive cleaned the amp off and the 494 is getting no power? on the bottom of the amp it has heat damage should i replace it?

ok now its getting 12v and 4.95v on the third pin

 

[Perry Babin]

With the power supply FETs out of the circuit, do you read ~5v DC on the gate pad for every power supply FET?

 

[timwebb]

the protect light comes on now but goes back off.and im not reading anything

 

[timwebb]

the protect light comes on now but goes back off.and im not reading anything

ok i get 4v on the gate pads

 

[timwebb]

the 494 is putting out a good signal and i get a good signal on the gate pad

 

[m4ick]

Wow, that amp is completely different from the bxi1606d I just fixed.

 

[timwebb]

the layout is different than what im use to dealing with brutus amps.

the 494 just started making a frying noise and them made a little smoke.what should i check before replacing this chip?

 

[Perry Babin]

4v on the gate pads should indicate that you have a good drive signal, especially if all gate pads had the same voltage.

What was replaced before you applied power?

Did you have the transistors tightly clamped to the heatsink?

Which transistors smoked?

 

[timwebb]

i changed four diodes cause they were leaking and checked the 494 and it was hot then i saw smoke come from it.