(Topic ID: 234834)

Space shuttle U47 sound amp gets very hot????


By Tbirdmatt66SS

8 months ago



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  • 6 posts
  • 2 Pinsiders participating
  • Latest reply 8 months ago by G-P-E
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#2 8 months ago

4 ohm speaker versus 8 ohm speaker?

#4 8 months ago

With no load on that one there isn't much that can go wrong.
Shorted C25?
Abnormally high +12V supply?
Proper R72/R73?
Solder bridge between a couple adjacent pins?

Replaced with TDA2002 or TDA2003?
Where did the parts come from?

#6 8 months ago

Where did the TDA2002 come from?
What type of cap at C25?
Nothing is plugged onto J15?

R72/R73 unlikely but weirder things have happened.
C26 would short out +12 supply and cut power to U47 - not this one.
C29 being shorted could introduce a DC offset into the amp. Yes, that can be bad but still not likely.

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