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Author
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Topic: Christie soundhead alignment problem
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Jean-Michel Grin
Expert Film Handler
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Posts: 222
From: Geneva & Lausanne, Switzerland
Registered: Jul 2002
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posted 05-14-2007 02:52 PM
Hi everyone,
Recently my boss asked me to align some dolby digital basement reader on various Christie P-35GPS. For this, I used the famous alignement tool from Christie “SK 1994-3”, Like explained by Brad Miller in the “Christie 35mm P-35GPS projector (re-review) “ an oscilloscope, a pc running the DRAS Software, and a Dolby Cat 530 film test loop. All the bearings on the soundrum shaft was replaced few weeks ago and all readers was perfectly clean. So I performed the alignement as usual, (I’m more familiar with Component Engineering basement reader on Simplex / Strong Cinema projectors by the way) The result on the scope an on the PC was perfect. The error rate was dramaticly low on the Dolby CP500 processor (3.5 – 4.0 ) Before it was on 6.5 – Fault. All seems me perfect at this time, but when I played the main feature again, the result was a disaster ! The error rate was ever on “Fault” I tried to re-align the reader with an another test loop, the result was fine, but when I played again the movie: same problem again. I suspected that the print had a bad digital sound track, but I tried with a another print and the result was deceiving too. On some other P35GPS projector that I aligned the result was fine for one day, and the day after with the same print, the error rate was on “F” again. I have no more idea to solve the problem, but if someone could give me some advice, it will be thankfull I’m realy deceived with these readers, and I think that the better solution could be to install on each projector a Dolby Cat 702 Digital sound reader. I saw that few years ago in a brand new multiplexe owned by Cinemark in Lima (Peru) when I was there for vacations: They running Christie P-35 projector and penthouse dolby digital reader...
Thanks for Your help and appologyses for my really weak English !
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