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Author Topic: Christie AW3 Problem William Dickson Film Handler Posts: 41 From: Riverside, Ca. USA Registered: Jan 2000 posted 01-06-2003 04:18 PM                     Yesterday I got a call from a projectionist that said when he was threading a film the return platter would spin for a couple seconds, stop, then start again. I went in to check it out and found the plug for the LED assembley was loose. After I reconnected it, I checked the LED intensity and got no reading. When I put the platter card back in, the platter spun just fine. I took the card out and once again could not get a reading on my meter. What could cause this? I checked all the obvious things: meter operational, platters turned on after I removed the cards and hooked up the meter, feed arm set to full speed, etc. Any ideas? Thanks in advance.  |  IP: Logged Paul G. Thompson The Weenie Man Posts: 4718 From: Mount Vernon WA USA Registered: Nov 2000 posted 01-06-2003 06:45 PM                     Did you get any reading at all with the card in and out? Remember...it is a DC voltage. Is it possible you were on the wrong function with your meter?  |  IP: Logged William Dickson Film Handler Posts: 41 From: Riverside, Ca. USA Registered: Jan 2000 posted 01-06-2003 08:09 PM                     What I was measuring was the the resistance in ohms to set the LED intensity. There was DC voltage with the card in as the motor was running.  |  IP: Logged Matthew Bailey Master Film Handler Posts: 461 From: Port Arthur,TX Registered: Sep 2000 posted 01-06-2003 08:58 PM                     Don't take voltage reading with your meter in ohms setting. It can damage your meter.  |  IP: Logged Tim Reed Better Projection Pays Posts: 5246 From: Northampton, PA Registered: Sep 1999 posted 01-06-2003 09:58 PM                       Pins 14 and 16 are across the LDR assembly. That is a pure resistance, you don't read it with a voltmeter.  |  IP: Logged Bob Koch Expert Film Handler Posts: 183 From: williams ca Registered: Nov 2001 posted 01-06-2003 10:05 PM                     Post deleted by moderator. Please read the FAQ before posting again.  |  IP: Logged Jon Bartow Master Film Handler Posts: 287 From: Massachusetts Registered: Nov 1999 posted 01-06-2003 10:20 PM                     Actually it's pins 12 & 14. They are the two pins farthest from the platter decks in each of the motor speed card slots. Double check that the meter is set for Ohms (or the greek omega symbol) not voltage or diode funtion etc. Are you removing only the speed card for the deck in question or are you removing the LED intensity card as well? Can you use your equipment to check another deck? Are any of the selector switches pushed in? Do any of the cards or the transformer or motor resistors show signs of damage? It sounds to me like there is a loose connection somewhere or a burnt trace on a card (possibly the LED intensity card or on the back of the selector switches. It is also possible that the motor needs servicing (i.e. new brushes or a good cleaning) PS. Mr. Koch: you need to read the FAQ's. in particular the last paragraph  |  IP: Logged Manuel Francisco Valencia Expert Film Handler Posts: 151 From: Oklahoma City, OK, USA Registered: Dec 2000 posted 01-06-2003 10:52 PM                     Check the filter to make sure it rotates smoothly. Also check the spring as well.  |  IP: Logged Tim Reed Better Projection Pays Posts: 5246 From: Northampton, PA Registered: Sep 1999 posted 01-07-2003 01:49 AM                       quote: Actually it's pins 12 & 14. Sorry about that, thanks, Jon. I'm a little out of practice... always seem to be 2 off on everything...  |  IP: Logged William Dickson Film Handler Posts: 41 From: Riverside, Ca. USA Registered: Jan 2000 posted 01-07-2003 12:14 PM                     I guess my big concern is how can a platter appear to run properly when I am getting no reading at pins 14 and 16 on that card slot? Yes the meter is working properly, set properly, and the platter is not selected for build up.  |  IP: Logged

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