Jump to content
Mike Harris

How good are you at electronic Repairs

Recommended Posts

Posted (edited)

I recapped one ADAM and the other one I just can't figure out.

I have the first working just fine but when I went to repair my second ADAM I encountered an anomaly.

 

Of course I checked the power supply and all lines are correct. 12v 5v and -5v...Ground...


Well, after changing a burned out tant cap the voltage on that line stabilized to +5 which it should however..

 

The trace feeding L4 and all the circuits on that line shows 24v which leads me to believe that 2 12v lines are being combined if such a thing is possible.  I mean, it's only being fed 12v into the system so how can there be 24v unless the power is being double by something.

Capacitor filled to 24v then dumping the power somewhere?

If someone has suggestion then I can give a more accurate detail of my testing but that is the major points.

All the main chips seem to be fine and are all being fed only 5 volts.
The 12v is only used for the digital data drive motors so the circuit is isolated to my knowledge.
Either way, I can't get it to boot up until I stabilize that back down to 12v

Edited by Mike Harris

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...

  • Recently Browsing   0 members

    No registered users viewing this page.

×
×
  • Create New...