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Author Topic: Clicking Sound Ram Sup Film Handler Posts: 57 From: Malaysia Registered: Mar 2008 posted 11-30-2009 10:07 AM                     There's clicking sound burst from centre HF speaker.Clicking sound only can be heard on analog and when i play in digital everything is ok.I'm using a P35GPS Chirstie projector with CP65,DA20 and DTS6.I've changed the diaphgarm,driver and Amp associated with centre HF speaker.I've also done the A-chain since the problem appears on when playing in SR format.Still there is mild sound burst coming from centre HF. PLease ADVICE as i'm really out of idea on how to solve this problem.  |  IP: Logged Mark J. Marshall Film God Posts: 3188 From: New Castle, DE, USA Registered: Aug 2002 posted 11-30-2009 10:10 AM                    Is the sound there when you switch to SR but don't have any film running? Does it happen without film with the exciter on? Off?  |  IP: Logged Ram Sup Film Handler Posts: 57 From: Malaysia Registered: Mar 2008 posted 11-30-2009 10:50 AM                     It only happens when film is running..  |  IP: Logged Jonathan Worthing Master Film Handler Posts: 384 From: Hereford, UK Registered: Apr 2001 posted 11-30-2009 10:57 AM                     Ram Have you done the hole of the A-Chain including the buzz track test with a scope.  |  IP: Logged Pete Naples Phenomenal Film Handler Posts: 1565 From: Dunfermline, Scotland Registered: Feb 2001 posted 11-30-2009 11:05 AM                     Is this noise regular or random? Changes with modulation? Could be a lump of muck on the scan drum interupting the light beam, or touching the cell as the drum rotates. Also check cell wiring is not touching the drum/shaft. Whilst you're at it check the cell wiring is good and tight.  |  IP: Logged Ram Sup Film Handler Posts: 57 From: Malaysia Registered: Mar 2008 posted 11-30-2009 11:23 AM                     Done the whole a-chain,checked on drum and solar cell wiring but still the same. Could be something wrong with the cards in CP65..?  |  IP: Logged Richard May Phenomenal Film Handler Posts: 1057 From: Floral Park, NY USA Registered: Aug 2004 posted 11-30-2009 11:30 AM                     Check in mono and Dolby A. Also, switch to bypass and see if you still have it.  |  IP: Logged Ram Sup Film Handler Posts: 57 From: Malaysia Registered: Mar 2008 posted 11-30-2009 11:39 AM                     will check on it....  |  IP: Logged Randy Stankey Film God Posts: 6539 From: Erie, Pennsylvania Registered: Jun 99 posted 11-30-2009 11:45 AM                     Check all your projector's belts to be sure they are not frayed or damaged. Be sure they run straight, smoothly and quietly on the pulleys. Check your sound drum to be sure it rotates smoothly and quietly. Also check the sprockets and guide rollers in the sound head. While you're at it, check ALL your sprockets and rollers. Clean, realign, repair and/or replace any parts you find suspect. Next, run the projector motor with no film and the analogue sound turned on. Almost like you're running a movie except with no film. (Turn the projector's xenon lamp off.) After you have cleaned, checked and repaired all your belts, pulleys, rollers and guides, does the problem still occur in the analogue sound, even with no film in the projector? Put film in the projector and run it again. Does the problem occur or not? IF NO film in projector but problem = yes THEN suspect projector at fault. IF (NO film in projector but problem = no) AND ( YES film in projector but problem = yes) THEN suspect cinema processor. IF anything else we need more information.  |  IP: Logged Ram Sup Film Handler Posts: 57 From: Malaysia Registered: Mar 2008 posted 11-30-2009 11:55 AM                     thanks randy... will check and revert back.  |  IP: Logged Demetris Thoupis Phenomenal Film Handler Posts: 1240 From: Aradippou, Larnaca, Cyprus Registered: Apr 2001 posted 11-30-2009 11:59 AM                     Are you certain the drum is not misformed thus passing in front of the reader each time it turns? In Digital a couple of perforations are forgiving but not in analogue. Is the clicking sound in rhythm/pattern or is it random each time it happens? Are you sure you have not overboosted the HF gain on the pre-amp. On A-Chain do you see any frequencies clipping? Do you have a spare pre-amp you can switch and see if the problem is still there? Did you try reseating all cards, especially Cat 222 or 222SR-A and Cat 300 or 350's and also the projector cell pre-amp card? How old is the cable from the reader to the projector? Did you check for continuity between the cable ends? If you test for continuity did you check that moving the ends of the cable the continuity still exists and not making a dry contact? Did you try switching the input from projector 1 to projector 2 and changeover the analogue to see if the problem still exists? Good luck. Demetris  |  IP: Logged Randy Bowden Expert Film Handler Posts: 146 From: Portland, OR, USA Registered: Aug 2000 posted 11-30-2009 05:36 PM                     Could be you have a bad SR card. Try running in Bypass and see if it crops up. If it's possible you could also swap cards with another auditorium and see if the problem follows  |  IP: Logged Sam D. Chavez Film God Posts: 2153 From: Martinez, CA USA Registered: Aug 2003 posted 11-30-2009 08:47 PM                       Does it click on all films? Does it have a reader or Jaxlight or is it an exciter lamp system? It could be static from the film to the drum and then to the reader or Jaxlight through the chassis of the reader. I've had a couple of these before. Try stopping the drum for a moment with the film running, it won't hurt it none. If the clicking stops, it's either static or a bit of hair or some such in the drum.  |  IP: Logged Louis Bornwasser Film God Posts: 4441 From: prospect ky usa Registered: Mar 2005 posted 11-30-2009 09:37 PM                        I'm betting on Sam's ideas. Louis  |  IP: Logged Marty Carr Film Handler Posts: 8 From: Greenfield, IN, USA Registered: May 2009 posted 11-30-2009 11:06 PM                     What kind of platters are you using? I have had this problem with Strong Platters using the micro switch in the control plate. Bad grounding in building wiring.  |  IP: Logged

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