Replacing broken micro

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tnnedaboard

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Hi,

I am a programmer, and recently I'm passionate electronics ...

I had a problem (dead) with the microprocessor circuit following ...
I'm venturing to replace the microprocessor, and thus to remake the software, since I know the signals generated.

I wanted to know if the signals on the transformer T1 must have a synchronism between them ...
I came to this, because if I unlink, for example, the signal on pin C of T1, I have an output signal of TP6, and if you remain connected (as it should be) I have no signal, and the MOSFET Q2 (IRF4905) is heating may be significant ...

 

Hi,

if I understand correctly, the signals in antiphase should be such as simulation I've done ... right? :?::?::?:

Note: The signal, black in color, is the original measured when the microprocessor was ok ...

PS: I could not try again because Q3 is dead and look forward to the new ...

[img=http://imageshack.us/scaled/thumb/850/r1x9.jpg]
 

I have tried using the phase-shifted signals and it works!

I do not understand the function of PIN49 (PWM signal to 40KHz)?

I got the gate driver circuit, it may be that I am confused with the type of transistors in SMD.

Q4 is marked BM P07 (should be a PNP?)
Q16 is marked 1Ft 05 (should be a NPN type BC547?).

signal pin49

[img=http://imageshack.us/scaled/thumb/89/99c4.jpg]
 

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