Hi, again.
I received this amplifier under these conditions ....
I replaced all the output transistors (3 IRF 9540 IRF 540 and 3 ...., sorry, one of the latter is IRF9640, I think no problem, right?)
I put in the power supply, (which came empty transistors, as shown in the photo) four IRF 3205, are those real?
I have also placed a new strength came not, R153
I have checked several components, and have not seen anything unusual ...
When connecting, have flown, Q7 and Q15, and electrolytic capacitors C20 and C22 (which also have made new, by the way ...) have been hot ...
Any idea what may have happened?
Does anyone have a schematic?
Thanks in advance.
I received this amplifier under these conditions ....
I replaced all the output transistors (3 IRF 9540 IRF 540 and 3 ...., sorry, one of the latter is IRF9640, I think no problem, right?)
I put in the power supply, (which came empty transistors, as shown in the photo) four IRF 3205, are those real?
I have also placed a new strength came not, R153
I have checked several components, and have not seen anything unusual ...
When connecting, have flown, Q7 and Q15, and electrolytic capacitors C20 and C22 (which also have made new, by the way ...) have been hot ...
Any idea what may have happened?
Does anyone have a schematic?
Thanks in advance.
Attachments
Power supply use: IRF 3205 and 47 ohm gates resistors
Replace the power supply drivers: MMBT3906 and MMBT3904
Confirm no shorted outputs
Confirm no DC on output terminals
This amp only uses IRF 540 and IRF9540 for outputs. IRF640 and IRF9640 are NOT used in this amp.
Do you have a scope?
Replace the power supply drivers: MMBT3906 and MMBT3904
Confirm no shorted outputs
Confirm no DC on output terminals
This amp only uses IRF 540 and IRF9540 for outputs. IRF640 and IRF9640 are NOT used in this amp.
Do you have a scope?
Hey, Sean, greetings and thanks for answering.
Now I'm at work, and I can not go home to replace components ....
But I have one small doubt, is that the last day I was checking parts, I thought I saw two capacitors wrong, and when removed, the broke, and do not know what value are (C13 and C16, the power supply) 0.001 mf ... perhaps?
Thanks again for your advice and ideas, when I have everything ready, I will explain what happens to the amplifier.
Yes, I have an oscilloscope.
Now I'm at work, and I can not go home to replace components ....
But I have one small doubt, is that the last day I was checking parts, I thought I saw two capacitors wrong, and when removed, the broke, and do not know what value are (C13 and C16, the power supply) 0.001 mf ... perhaps?
Thanks again for your advice and ideas, when I have everything ready, I will explain what happens to the amplifier.
Yes, I have an oscilloscope.
The board number is: PC4337F
But, do not worry, I got yesterday reading its value, one of which was broken, and I scored 0.02, which can easily be what you say, 0,027, (and I have replaced them with new ones that value)
Also yesterday, I replaced the 3205 I was missing, I went to check the drivers, power supply, and found one short (Q2) which I replaced also.
Now I am waiting to receive the IRF 9540, I arrive in two days.
As soon as you have, and install one I'm missing, I'll connect, and tell you what happens.
Again I thank you for your advice and support, I help much, you're a great guy.
But, do not worry, I got yesterday reading its value, one of which was broken, and I scored 0.02, which can easily be what you say, 0,027, (and I have replaced them with new ones that value)
Also yesterday, I replaced the 3205 I was missing, I went to check the drivers, power supply, and found one short (Q2) which I replaced also.
Now I am waiting to receive the IRF 9540, I arrive in two days.
As soon as you have, and install one I'm missing, I'll connect, and tell you what happens.
Again I thank you for your advice and support, I help much, you're a great guy.
Well, then installed the latest transistor, and after connecting the amplifier, for an hour, perfect performance!
Another problem solved. thanks Sean, for your help and greetings from Spain.
Another problem solved. thanks Sean, for your help and greetings from Spain.
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