Dwm0608X_V20

[trean27]

Dwm0608X_V20
any way to get these board somewhere,
its installed on a Ground zero gzua 1.1000dx.
Or if someone sits on scematic on this board. ?

I overheated the pads on the to ics so pretty much destroyed the copperlines around.
i reflowed the u2 an u3 too many times ,
i assume u2 was tl072 and u3 is lm311 or 211..

so it got this board messed up.

best regards
Niklas .

 

[Perry Babin]

Do you have a scope?

 

[trean27]

no, only magnifing glass.

 

[Perry Babin]

Oscilloscope, not microscope.

 

[trean27]

Yes. I Have a ossilioscope

 

[Perry Babin]

Please (and this applies to anyone who needs repair help) use your sig line to list all equipment you have, editing it as equipment changes. Include the model numbers.

Oscilloscope (yes or no)
Multimeter(s)
Type of signal source (grounded RCA shields preferred).
Soldering iron
Desoldering pump
Power supply
2 ohm current limiting resistor (hollow cylindrical ceramic 100w preferred)

 

[trean27]

I have all of the above. including a magnifiying glass... 🙂 🙂

 

[Perry Babin]

Are you going to use your sig line to list the equipment?

If you drive a signal into the amp, do you see that signal on the output terminals of the TL072 and the LM211?

 

[trean27]

I will purchase your repair tutorial, still not a expert, and i need to learn more,
I have removed the tl072 and the lm211 from board right now, and as I wrote before, I destroyed some of the copper lines for the ics. I had hope to be able to buy a new board, but thats probably impossible.

thanks .
I send you a email for the tutorial

 

[trean27]

Hi, thanks Perry for a very instuctable tutorial file i got from you.
It is almost the same from your file the dwm0608,
but i ruined some of the board with my hot air gun... and lost c13 capacitor...
Do you know the value for that between pin 1 and 2 on tl0272?
I will start the repair process this weekend.
thanks.

 

[Perry Babin]

I'm not 100% sure but a 1200pF capacitor it used there on other 3S-tech amps.