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» Film-Tech Forum ARCHIVE   » Operations   » Film Handlers' Forum   » Dolby Digital--Error Number Increase Cause (Page 2)

 
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Author Topic: Dolby Digital--Error Number Increase Cause
Mark Gulbrandsen
Resident Trollmaster

Posts: 16657
From: Music City
Registered: Jun 99


 - posted 09-24-2007 02:57 PM      Profile for Mark Gulbrandsen   Email Mark Gulbrandsen   Send New Private Message       Edit/Delete Post 
While I am too a CAT 700 fan beware that there are no light pipes available for them any longer. If you're moving them around pack them in an exceptional foam lined case! If you crack it or scratch its surface its an expensive upgrade at Dolby to make it into a CAT 702, basically about 2/3 the cost of a new reader and not worth it. We had one such reader like this that a customer bought used off of E-Bay. The surface of the light pipe was scratched and although we found an optical person at Hill Air-Force base that polished the scratch out for us there was still a crack within the light pipe that prevented normal illumination of the track. For this reader I machined my own LED mount half to accept Dolby's standard LED and the reader is working fine again.

Its somewhat surprising that Dolby has not gone to a single super bright LED as was used on the Sony 3000 penthouse. All of those Sony LED's around here are still going strong after many many years of service. At least Sony did one aspect of the SDDS system quite well.

Mark

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System Notices
Forum Watchdog / Soup Nazi

Posts: 215

Registered: Apr 2004


 - posted 12-31-2009 09:06 PM      Profile for System Notices         Edit/Delete Post 

It has been 829 days since the last post.


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Ron Curran
Jedi Master Film Handler

Posts: 504
From: Springwood NSW Australia
Registered: Feb 2006


 - posted 12-31-2009 09:06 PM      Profile for Ron Curran   Author's Homepage   Email Ron Curran   Send New Private Message       Edit/Delete Post 
Sorry to drag up this old thread but it is for good news.
I saw my first 0 (zero) on my Dolby Digital processor today. Old system, new print of The Princess and the Frog.
Some printers can do it right.

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Jeremy Weigel
Phenomenal Film Handler

Posts: 1062
From: Edmond, OK, USA
Registered: Mar 2007


 - posted 12-31-2009 10:50 PM      Profile for Jeremy Weigel   Email Jeremy Weigel   Send New Private Message       Edit/Delete Post 
We had a trailer not too long ago that was giving solid zeros and occasional ones. I took pics of it, because I'd never seen it happen before.

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John Wilson
Film God

Posts: 5438
From: Sydney, Australia.
Registered: Dec 1999


 - posted 01-03-2010 04:11 PM      Profile for John Wilson   Email John Wilson   Send New Private Message       Edit/Delete Post 
quote: Ron Curran
new print of The Princess and the Frog.
Did you get a print from Thailand too, Ron? [thumbsup]

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Chris Slycord
Film God

Posts: 2986
From: 청주시, 경북도, South Korea
Registered: Mar 2007


 - posted 01-03-2010 05:36 PM      Profile for Chris Slycord   Email Chris Slycord   Send New Private Message       Edit/Delete Post 
A bit off-topic but I remember opening up a CP-500 to check the error levels since I didn't know why it'd reverted to SR.

Instead, the thing said "O - H - E - L - P". It made me chuckle that the device was asking for help. Thankfully, a tech fixed it the next day.

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Ron Curran
Jedi Master Film Handler

Posts: 504
From: Springwood NSW Australia
Registered: Feb 2006


 - posted 01-03-2010 06:45 PM      Profile for Ron Curran   Author's Homepage   Email Ron Curran   Send New Private Message       Edit/Delete Post 
John,
Can't find a source on the box or print - just Technicolor and Ship to Australia, so we can assume it came from out there.
Image is nice too. Just when I thought we needed a new lens, along comes a print that looks great.

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Jeremy M Smith
Film Handler

Posts: 48
From: Taupo New Zealand
Registered: Aug 2008


 - posted 01-09-2010 02:34 AM      Profile for Jeremy M Smith   Email Jeremy M Smith   Send New Private Message       Edit/Delete Post 
Wish I could be so lucky I have one that does the 4 - F - 5 - F ect fixed it once with changing the bearing in the layon roller what a mission 6 months later it back to it's old tricks. One day I might see a 0

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Demetris Thoupis
Phenomenal Film Handler

Posts: 1240
From: Aradippou, Larnaca, Cyprus
Registered: Apr 2001


 - posted 01-09-2010 02:57 AM      Profile for Demetris Thoupis   Email Demetris Thoupis   Send New Private Message       Edit/Delete Post 
Jeremy what projector are u using?

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Jeremy M Smith
Film Handler

Posts: 48
From: Taupo New Zealand
Registered: Aug 2008


 - posted 01-09-2010 03:22 AM      Profile for Jeremy M Smith   Email Jeremy M Smith   Send New Private Message       Edit/Delete Post 
Demetris it is a simplex 5 star sound head

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Demetris Thoupis
Phenomenal Film Handler

Posts: 1240
From: Aradippou, Larnaca, Cyprus
Registered: Apr 2001


 - posted 01-09-2010 01:18 PM      Profile for Demetris Thoupis   Email Demetris Thoupis   Send New Private Message       Edit/Delete Post 
Hello Jeremy,
What is the status of the dampen roller? Is it steady or is it bouncing back and forth during playback? Is the lateral adjustment tight or is it moving? Is the sounddrum spinning properly or is it glitched? When you turn it by hand it should spin freely on the flywheel and take a while to stop. If its spinning with difficulty then that is where your problem is. Check whether the flywheel has come loose for some reason. Also confirm the correct video level (4V) is coming in your processor.
Demetris

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Jeremy M Smith
Film Handler

Posts: 48
From: Taupo New Zealand
Registered: Aug 2008


 - posted 01-10-2010 02:54 AM      Profile for Jeremy M Smith   Email Jeremy M Smith   Send New Private Message       Edit/Delete Post 
What do you mean by the dampen roller is ti the one that lays on the top to hold the film in place for the sound drum ?

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Demetris Thoupis
Phenomenal Film Handler

Posts: 1240
From: Aradippou, Larnaca, Cyprus
Registered: Apr 2001


 - posted 01-10-2010 03:00 AM      Profile for Demetris Thoupis   Email Demetris Thoupis   Send New Private Message       Edit/Delete Post 
There should be a roller after the soundrum which acts like a balancer and acts like a spring when you try to move it.
Demetris

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Ron Curran
Jedi Master Film Handler

Posts: 504
From: Springwood NSW Australia
Registered: Feb 2006


 - posted 01-28-2010 11:17 PM      Profile for Ron Curran   Author's Homepage   Email Ron Curran   Send New Private Message       Edit/Delete Post 
Just to update. Our Princess and the Frog print was still bringing up 0 error rates at the end of its 4 week run.
FilmGuard used every alternate session.

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Monte L Fullmer
Film God

Posts: 8367
From: Nampa, Idaho, USA
Registered: Nov 2004


 - posted 01-29-2010 12:16 AM      Profile for Monte L Fullmer   Email Monte L Fullmer   Send New Private Message       Edit/Delete Post 
quote: Demetris Thoupis
There should be a roller after the soundrum which acts like a balancer
..Called the "snubber roller" and a lot of times, the goop that adds the return friction under that spring goes bad and have to be re-gooped so the snubbing action can return to balance out the film flutter as it goes around the scanner drum.

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