Hifonics brx2416.1d

[rhempz01]

12v there on pin 7 pad

 

[Perry Babin]

Measure pin 6-7 again.

Diode check and resistance. Measure one way then reverse the probes

 

[rhempz01]

With pin 7 connected to the pad?

 

[Perry Babin]

No. I want to see what the IC reads, not the board.

 

[rhempz01]

21.1mv from black on pin 5 red on raised pin 7

 

[rhempz01]

sorry perry i answered incorrectly. resistence is
Black on pin 5/ red on 7: .882mohm
Reversed : 851mohm
Diode Check:
open with red on 5 and black on 7
Red pin7 Black pin 5: .495vdc

 

[rhempz01]

New ic and still current draw. Do you know the proper diode for this placement?

 

[rhempz01]

Sorry photo didn't attach. Is diode d12. This is the one that blew in half.

 

[Perry Babin]

Is the anode connected to leg 3 of the FET?

Is that a 'low-side' FET?

Can you power the amp up long enough to measure the DC voltage between legs 1 and 3 of the output transistors? I just need the voltage from one high-side and one low-side. Black probe on leg 3.

 

[rhempz01]

What is u3? It's a soic8 that is unreadable?

 

[rhempz01]

With the recifiers, I beleive so. Current is very high however. Something may smoke. I'll try.

 

[Perry Babin]

Clamp everything down and use a limiter.

 

[rhempz01]

Irf1: had 12.86vdc and irf5 had 4.6vdc

 

[rhempz01]

I can't seem to get an accurate reading from the low side. It's too inconsistent. -.25 and then above ground.?

 

[Perry Babin]

If you disable the IC by soldering a jumper between pins 2 and 3, does it still draw excessive current?

 

[Perry Babin]

see #35 also

Aren't IRF1 and IRF5 on the same side?

 

[rhempz01]

One of the ps fets just stating smoking when I sodered the bridge in and powered it up
It really hot so I pulled it, still not shorted. But was trying to power through one. I pulled all the output transistors looking for fault as well.

 

[rhempz01]

Yes they are so I thought is strange that they are different.

 

[Perry Babin]

Are the gate resistors within tolerance?

 

[rhempz01]

I have 25.23kohm on one side gate pull down resistors and the other low side measures 1.4kohm shouldn't they all be the same around 10-20k?