(Topic ID: 81614)

Missing music on CFTBL


By vilant

5 years ago



Topic Stats

  • 54 posts
  • 7 Pinsiders participating
  • Latest reply 5 years ago by ChrisHibler
  • Topic is favorited by 2 Pinsiders

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#36 5 years ago

Please post a YT video of what you are seeing.
It'll be much easier to make suggestions.
--
Chris Hibler - CARGPB #31
http://www.Team-EM.com
http://webpages.charter.net/chibler/Pinball/index.htm
http://www.PinWiki.com - The new place for pinball repair info

#44 5 years ago

I'd try JWJs suggestion.
Boot the game and get into sound test and let it run.
Remove the ribbon connection that goes from the sound board to the dot controller at the dot controller. Any change?
Next remove the 2nd connector from the four position ribbon at the FlipTronics board. Any change?
This can be done with the game on, generally. If you hear anything lock on, power down.
The display will not work, as you've removed its data source. No biggie.

If these tests don't yield anything, my next suspicion is the sound board RAM. I've seen only one failed sound board RAM, but the results were similar to yours. That RAM isn't tested by the boot diagnostics.

It's not socketed, so use the diode test, comparing between your TAF and Creech boards, looking for differences. You'd like to be more sure before attempting repair or sending the board out. If you haven't acquired good PCB repair skills, send it out. Those boards are pricey and you don't want to hack it. While it's out, replace all the 47uf caps on the board. They are generally dried out and not doing there job.
--
Chris Hibler - CARGPB #31
http://www.Team-EM.com
http://webpages.charter.net/chibler/Pinball/index.htm
http://www.PinWiki.com - The new place for pinball repair info

#47 5 years ago
Quoted from vilant:

OK mystery solved. Pulled the ribbon cable off the fliptronics board and everything works perfect. Now to figure out what on the fliptronics board is causing this strange behavior.

Bingo.
The bus interface ICs are the chief suspects after checking for solder bridges as JWJ suggested.
--
Chris Hibler - CARGPB #31
http://www.Team-EM.com
http://webpages.charter.net/chibler/Pinball/index.htm
http://www.PinWiki.com - The new place for pinball repair info

#54 5 years ago

Nice work! That was an odd one. I like the odd ones.
--
Chris Hibler - CARGPB #31
http://www.Team-EM.com
http://webpages.charter.net/chibler/Pinball/index.htm
http://www.PinWiki.com - The new place for pinball repair info

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