Autotek MX3000.1

[RJohns777]

Working on an Autotek MX3000.1. Board is burned around the power supply driver transistors. Would be a big help if someone could post a picture of the top and bottom of the board around the drive circuit so I can rebuild it. Thanks

 

[Perry Babin]

All of the traces appear to be there. What is it that you need to know about the circuit?

 

[RJohns777]

Here's a couple of clearer pictures of what I've got. I can guess where most go but not 100 percent sure.

 

[Perry Babin]

Start with what you know and work from there. It appears to be a typical drive circuit.

What are you going to do about the carbonized fiberglass? It needs to be 100% removed.

 

[RJohns777]

Yes I know. Wasn't going to go through all that till I was sure I could get it working. Thanks!

 

[Perry Babin]

Does the owner know (is he OK with) that the board will have to be cut away?

Are you going to fill the hole or leave it open?

 

[RJohns777]

He knows there is no other option if he wants it repaired. As long as the repair is stable. The issue is can I get the drive circuit repaired and secured enough that things won't vibrate apart. Is this something you would repair or walk away from?

 

[Perry Babin]

It would likely depend on how much work was coming in. If I was starving to death, I'd do it. If I had stacks of amps for paying customers waiting to be repaired, I'd pass.

 

[RJohns777]

Good answer. I think I have the circuit figured out. Like you said typical NPN PNP drive circuit. There was two traces in question. Now if I can reconstruct it once I get the board cut out.