Replacing broken micro

[tnnedaboard]

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 ...

 

[chuckey]

Q1 and Q2 provide an inverter drive to each side of T1, their DC (18V) is fed in on B. Some where the output from T1 must be used, but you have not shown it.
Frank

 

[tnnedaboard]

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]

 

[tnnedaboard]

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]