Help Hifonics Z500D hip4080

[Mjimenez]

Hello friends, greetings, this time I have a Hifonics amplifier it seems nice to me and the problem here is that it could not make the hip4080 start, although I am not sure that in the output stage it has mosfets rfp70n06 and what is the license plate of the IC2 If anyone had information on this little guy I would appreciate it ... Have a great day.

 

[Perry Babin]

http://www.bcae1.com/temp/Fusion-FP9001D caramp - 4080 like stealth.pdf

 

[Mjimenez]

thanks Mr. Perry Babin now I check the diagram since on pin 6 I have 6.3v with a perfect triangular shape and on pin 7 11.53v, I don't know if it is correct.

 

[Perry Babin]

Are any components (IC, FETs...) missing from the circuit?

 

[Mjimenez]

Everything is in place, what is the probability that jfet j112 will fail? in a moment I comment all the voltages on the pins of the hip4080

 

[Mjimenez]

here the voltages of the HIP4080

 

[Perry Babin]

You don't appear to have rail voltage.

 

[Mjimenez]

I see in the diagram that VCC enters through 1 inductor (L3) in my case RFC3 and reaches a drain of 2 fets but I no longer see it later in the HIP4080 where should it be?

 

[Perry Babin]

Try this. Remove the jfet Q5.

Short terminals 1 and 2 of the 5470 together.

Does that allow the voltage on pins 6 and 7 to be equal?

Does the 4080 produce output?

 

[Mjimenez]

pin 7 goes to 5.975v and pin 6 stays at 6.499v although no output is produced on the HIP4080

 

[Perry Babin]

What is the amplitude of the triangle waveform on pin 6?

 

[Mjimenez]

I don't know if my oscilloscope is failing but it gives me 3.43vpp and 125hz

 

[Perry Babin]

Post a photo of the waveform. Post the scope vertical amp and timebase settings and the probe 1x/10x settings.

 

[Mjimenez]

very good tomorrow as soon as i have time i upload the photo greetings

 

[Mjimenez]

Here is the image of the wave I see on pin 6 of the HIP4080

 

[Perry Babin]

Where was the black probe?

 

[Mjimenez]

I tested the black tip on secondary negative 1 time and on another occasion primary negative and the wave and frequency came out the same

 

[Perry Babin]

This makes no sense to me. The waveform should be biased to 6v.

 

[Mjimenez]

What do you think, Mr. Babin?

 

[Perry Babin]

That's better. What did you do to go from the previous display to this one?