Hifonics bxi 1606d led red

[Mjimenez]

Hello, such friends and administrators I have a problem with a amplifier hifonics bxi 1606d I got protected and I came with mosfet (irfz44n) my question if someone will have a picture or if he knew what the originals and remove the 12 that this amplifier carries and it has been fine without problems only that I tested the mosfets and only 3 damaged and put new ones when placing them returned protection, remove them and turn on the green light again I will add an image so that they see the plate of the hifonics and beforehand I would appreciate your help

 

[Jason Smith 616]

For the power supply fets i recommend using IRF3205 with 47 ohm gate resistors .

You may have shorted outputs in this amp since it still protects on you.

If all of the outputs test fine and none are shorted or leaking the remove the audio driver board after replacing the power supply fets . Does this make the amp power up after removing the audio driver board?

There are 2 smd transistors on the audio driver board that fail ..

The power light is driven off the pwm board in this amp i believe so when you have fets in the amp it will protect showing another fault and when you remove them the amp is not powering up you are only supplying voltage to the pwm board which runs the power led

 

[Mjimenez]

Oky I will confirm the resistors and the smd transistors of the audio controller board. In fact, I think that the outputs have been removed, so it has turned me on right now. It confirmed what was said and I told them how it was.

 

[Mjimenez]

Oky and I checked apparently they are in good condition I just need to corroborate and try the (irf3205) if they are the originals by the way in another post I just read that the original fqp65n06 are true?

 

[Mjimenez]

these I occupy are the mosfets Q9 to Q20

 

[Perry Babin]

These are the transistors that he was referring to. If the board around them is even the slightest bit discolored/darkened, replace them. Use a bright lighted magnifying glass to examie carefully. They may check as being OK with a multimeter but can't perform at high frequencies.

They used various FETs in the power supply. The ones he suggested are more likely to survive until the protection circuit can shut the amp down if the outputs fail.

 

[Mjimenez]

Hi, what's up again if you notice that if it reflects something of that let me see how I upload the photo that I just took so you can see it and the transistor has this legend (1D 2) that the part name or model has this component

 

[Perry Babin]

Go Advanced below then Manage Attachments on the next page

 

[Mjimenez]

here you can see something like an explosion

 

[Perry Babin]

Two things. They turn brown when they run hot for a long time. At least one is brown. Secondly, look at the board between the base and emitter terminals. The board show signs of heat stress. Compare to other transistors of the same style.

I'd replace them.

 

[Mjimenez]

I already checked the two and they are well they are pnp according to the ZXTP07040DF datasheet and they are well m prove the other component in the same way I comment that also without this tablet prendenormal

 

[Perry Babin]

1D is an MMBTA42.
http://www.onsemi.com/pub/Collateral/PZTA42-D.pdf

 

[Mjimenez]

Oky I will replace them and I checked them again and gave them a good replacement and I will tell you if it worked

 

[Mjimenez]

Hola Perry Babin , I'm waiting for the 2 transistors to arrive and I'll change them and I'll tell you how it went.

 

[Mjimenez]

Hello, I have already changed the aforementioned transistors, I do not see a change in fact, I have removed the mosfets from the exits and it turns on but I think that the led is with a very low brightness more check to see what I find

 

[Mjimenez]

Hello, such friends have already given solution to my amplifier in if it was an irf640n transistor which was doubtful because it failed him tests and went well in one of those notes that warmed up and changed it and resolved business greetings and thanks for your help Perry Babin

 

[Mjimenez]

Hello Perry Babin, sorry, is it normal for the pwm card to warm up already working?

 

[Perry Babin]

It gets too hot to touch. That's why components on it fail. I build a heat spreader to distribute the heat.

 

[Mjimenez]

Ok

 

[Mjimenez]

Oky will manufacture a heatsink ... should it go through the front or back of the card as it would be more efficient?