(Topic ID: 234834)

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

By Tbirdmatt66SS

5 years ago



Topic Stats

  • 6 posts
  • 2 Pinsiders participating
  • Latest reply 5 years ago by G-P-E
  • No one calls this topic a favorite

You

Linked Games

You're currently viewing posts by Pinsider tbirdmatt66ss.
Click here to go back to viewing the entire thread.

#1 5 years ago

Hello. On my space shuttle, the U47 amp for sound on the heat sink gets very hot in a very short time. It has been replaced and I used thermo compound between it and the heat sink. CPU board is on the bench with a pc power supply providing 5v and +12 volts. What would be causing the amp chip to run so hot?
Thanks.

#3 5 years ago

There are no speakers connected at this time. Nothing is connected to the board except +5V and +12V

#5 5 years ago

I believe it was a TDA 2002. No soldier bridges. The voltage is good. I think I replaced c25. Perhaps r72/r73 need looked at as well as the other axial caps in the sound circuit? Maybe C28 and C29 are shorted?

Promoted items from Pinside Marketplace and Pinside Shops!
Wanted
Machine - Wanted
Watertown, MA
$ 36.95
Eproms
Pinballrom
 
From: $ 1.25
Playfield - Other
Rocket City Pinball
 
$ 18.95
Eproms
Pinballrom
 
$ 44.99
Cabinet - Shooter Rods
Pinball Shark
 
$ 50.00
Cabinet - Toppers
Slipstream Mod Shop
 
$ 69.00
Gameroom - Decorations
Pinball Pimp
 
6,500
Machine - For Sale
Homer Glen, IL
From: $ 33.00
Gameroom - Decorations
Rocket City Pinball
 
3,450
Machine - For Sale
Ogden, UT
$ 749.00
Flipper Parts
Mircoplayfields
 
$ 69.00
Gameroom - Decorations
Pinball Pimp
 
$ 27.95
Eproms
Pinballrom
 
From: $ 35.00
Cabinet - Other
Rocket City Pinball
 
$ 69.00
Gameroom - Decorations
Pinball Pimp
 
2,200 (OBO)
Machine - For Sale
Allentown, PA
$ 1.00
Pinball Machine
Pinball Alley
 
$ 18.95
Eproms
Pinballrom
 
$ 69.00
Gameroom - Decorations
Pinball Pimp
 
$ 36.95
Eproms
Pinballrom
 
$ 54.99
Cabinet - Shooter Rods
Lighted Pinball Mods
 
Hey modders!
Your shop name here

You're currently viewing posts by Pinsider tbirdmatt66ss.
Click here to go back to viewing the entire thread.

Reply

Wanna join the discussion? Please sign in to reply to this topic.

Hey there! Welcome to Pinside!

Donate to Pinside

Great to see you're enjoying Pinside! Did you know Pinside is able to run without any 3rd-party banners or ads, thanks to the support from our visitors? Please consider a donation to Pinside and get anext to your username to show for it! Or better yet, subscribe to Pinside+!


This page was printed from https://pinside.com/pinball/forum/topic/space-shuttle-u47-sound-amp-gets-very-hot?tu=tbirdmatt66ss and we tried optimising it for printing. Some page elements may have been deliberately hidden.

Scan the QR code on the left to jump to the URL this document was printed from.