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Author Topic: Sound Drum Problem. Matthew Stevens Film Handler Posts: 37 From: Colorado Springs, Co Registered: Jan 2004 posted 11-23-2005 05:23 PM                        Hey I'm having a problem with my second projector, every time a splice goes thru the sound drum, a "honking" sound occurs. You could describe it as "Fog Horn" noise. It only occurs in my second projector, never my main projector. The two projectors are exactly the same. Same sound drum, same splicing tape, same everything. The sound drum is a red led, B.A.C.P. LED. Sound drum is a simplex. Anyone have an idea on what's happening?!?  |  IP: Logged Steve Guttag We forgot the crackers Gromit!!! Posts: 12814 From: Annapolis, MD Registered: Dec 1999 posted 11-23-2005 07:50 PM                     My guess is that your lateral alignment is not as good as it could be on the 2nd projector...thus, when a splice goes through, it is allowing the reader to read the perfs until the lateral guide roller corrects it. Additionally, you might want to give the soundhead lateral guide roller assembly a good look...if the spring loaded side (inboard) is not working smoothly (it shouldn't be mushy either) then it needs some service. In either case, Buzz track test film (P35-BT) is required to get things aligned if or when the lateral guide roller is working properly. Steve [ 11-24-2005, 12:50 AM: Message edited by: Steve Guttag ]  |  IP: Logged Monte L Fullmer Film God Posts: 8367 From: Nampa, Idaho, USA Registered: Nov 2004 posted 11-24-2005 02:04 AM                     ..yep, could be picking up the timecode through the optical when the splice goes through...had that happen to me as well.  |  IP: Logged Michael Schaffer "Where is the Boardwalk Hotel?" Posts: 4143 From: Boston, MA Registered: Apr 2002 posted 11-24-2005 05:06 AM                        I think the "foghorn" characterization points more to the reader seeing the perforation when the splice goes through. BTW, I just wanted to point out that not every single part in the sound head is called "sound drum".  |  IP: Logged Louis Bornwasser Film God Posts: 4441 From: prospect ky usa Registered: Mar 2005 posted 11-24-2005 09:02 AM                        Simplex sound head: honking noise on splice. My guess is that you either have an alignment problem OR a small crack has developed in the top piece of the lateral guide swivel. This causes the felt/rubber roller to not track straight and any interruption (splice) causes a serious scan of the perfs. I've seen it more than 20 times. Louis  |  IP: Logged Matthew Stevens Film Handler Posts: 37 From: Colorado Springs, Co Registered: Jan 2004 posted 11-30-2005 04:47 PM                        Found it, laterial alignment was rusted!!! My tech polished it and put it back together. Works great now.  |  IP: Logged

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