35mm Cinema Film Projector teardown

• 35mm Cinema Film Projector teardown
  Posted by tesla500 on 05 Jun, 2012 19:43
• I know this isn't totally (or even mostly) electronics, but I think you'll find this one interesting. Here's a teardown of a 35mm film projector that I got from a local cinema after they converted to digital projectors.
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
• #1 Reply
  Posted by mikeselectricstuff on 05 Jun, 2012 23:19
• Super cool  - my favorite kind of tech - originally very expensive but now completely obsolete!
  Do you have the Dolby digital decoder ? That would be interesting to see inside.
  
• #2 Reply
  Posted by tesla500 on 06 Jun, 2012 00:16
• Quote from: mikeselectricstuff on 05 Jun, 2012 23:19

  Super cool  - my favorite kind of tech - originally very expensive but now completely obsolete!
  Do you have the Dolby digital decoder ? That would be interesting to see inside.
  

  
  Thanks Mike! I love this kind of stuff too.
  
  Unfortunately the Dolby digital decoders are still being used (as analog preamps for the main theater amps), I'd love to get one though. I'm eager to see how they do this rather intensive decoding job using 90s tech. Probably some high end (for the time) FPGAs. Gotta start checking ebay...
  
  David
• #3 Reply
  Posted by BravoV on 06 Jun, 2012 06:45
• Thank you, really cool and thats is really an impressive machine, and its quite an effort just to drag it home, kudos to you & team.
  
  PS : Actually you've inspired me, I might approach our local cinema, who knows I could get one cheaply. 
• #4 Reply
  Posted by DrGeoff on 06 Jun, 2012 10:49
• Great set of videos. Very interesting to see the internals of those big old projectors.
  So what's next? Teardown of the digital projector ?
• #5 Reply
  Posted by mikeselectricstuff on 06 Jun, 2012 11:37
• Quote from: DrGeoff on 06 Jun, 2012 10:49

  Great set of videos. Very interesting to see the internals of those big old projectors.
  So what's next? Teardown of the digital projector ?
  

  Might have to wait a while for that one - any chance of a quick video tour of the projection room to at least see the outside of all the gear??
  
  Meanwhile here's a teardown of a not-quite-cinema sized projector :
  
• #6 Reply
  Posted by tesla500 on 22 Jun, 2012 15:54
• Update: Ballast and Synchronous motor teardowns posted, check the first post.
  
  Edit: Looks like I've also got a Dolby Digital decoder for teardown too! One of the other theaters in the chain my friend works at is throwing some out.