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Author Topic: CP500 issue Travis Cape Expert Film Handler Posts: 122 From: St. Louis, MO, USA Registered: May 2000 posted 08-21-2008 08:14 PM                     I am stumped. I tried running a film on projector two in a dual projector booth today and couldn't get any analog sound. This machine has a Kelmar reader, both the preamp and the LED lights were on, on the power supply, and the CP 500 did changeover to proctor two. I inspected all the wiring, as I haven't run that projector in six weeks. Projector one was just fine. I would suspect the preamp, but while the film was running, I started to set dolby level and the film sound came on briefly. Because of that, I assume that if I thread dolby tone that I can set that, but still no analog sound in any format. Thoughts?  |  IP: Logged Jeremy M Smith Film Handler Posts: 48 From: Taupo New Zealand Registered: Aug 2008 posted 08-21-2008 08:27 PM                     Have you tried pressing the bypass button to see if that makes a difference  |  IP: Logged Travis Cape Expert Film Handler Posts: 122 From: St. Louis, MO, USA Registered: May 2000 posted 08-21-2008 08:39 PM                     I tried bypass and turning the processor off and on. None of that helped.  |  IP: Logged Monte L Fullmer Film God Posts: 8367 From: Nampa, Idaho, USA Registered: Nov 2004 posted 08-21-2008 10:04 PM                     Sounds like that changeover mechanism from Proj. No.2 isn't pulsing the processor over to receive that signal from No.2's soundhead.  |  IP: Logged Travis Cape Expert Film Handler Posts: 122 From: St. Louis, MO, USA Registered: May 2000 posted 08-21-2008 10:13 PM                     Monte, the light on the preamp for projector two does light and the screen display indicates P2.  |  IP: Logged Monte L Fullmer Film God Posts: 8367 From: Nampa, Idaho, USA Registered: Nov 2004 posted 08-21-2008 10:43 PM                     Try this one then: power down the 500, pull the preamp card and reinsert it in its slot. Sometimes the contacts in the card gets a 'set in' and by removing the card then reinserting it clears up this problem. Do you have another preamp card to do a swap?  |  IP: Logged Travis Cape Expert Film Handler Posts: 122 From: St. Louis, MO, USA Registered: May 2000 posted 08-21-2008 11:02 PM                     Monte, I'll try that tomorrow. I don't have another preamp card to check. What confused me more was that you can set dolby level. The processor acknowledges the projector is there for that function...  |  IP: Logged Steve Guttag We forgot the crackers Gromit!!! Posts: 12814 From: Annapolis, MD Registered: Dec 1999 posted 08-21-2008 11:13 PM                     Since it is a CP500 with dsub inputs...have you tried swapping the inputs so P2 feeds P1's preamp and vice-versa. This would quickly locate the source of the problem (soundhead reader or Dolby issue). Steve  |  IP: Logged Travis Cape Expert Film Handler Posts: 122 From: St. Louis, MO, USA Registered: May 2000 posted 08-21-2008 11:28 PM                     Steve, I thought that since the reader works for setting dolby level that meant the issue was with the processor, I just don't know where. I'm having trouble with the fact that you can set dolby level with a machine, but not run a film in analog. What's the difference? Aren't they both running film through the same sound head?  |  IP: Logged Marin Zorica Jedi Master Film Handler Posts: 671 From: Biograd na Moru, Croatia Registered: May 2003 posted 08-22-2008 01:21 AM                     You said you can set dolby level on that PRO2?? Does level light on 222SR/A are burning or?? Probably something with audio chain from preamp to A/D conv. Because if you can set level, than preamp is working.  |  IP: Logged Brad Miller Administrator Posts: 17775 From: Plano, TX (36.2 miles NW of Rockwall) Registered: May 99 posted 08-22-2008 01:47 AM                     Its a CP500. Reboot it. There's better than a 90% chance it will be fine after rebooting it.  |  IP: Logged Louis Bornwasser Film God Posts: 4441 From: prospect ky usa Registered: Mar 2005 posted 08-22-2008 12:11 PM                        Swap (temporarily) the Kelmar power supplies. I think you will find the PRE PREAMP power is intermittent. Louis  |  IP: Logged Travis Cape Expert Film Handler Posts: 122 From: St. Louis, MO, USA Registered: May 2000 posted 08-22-2008 07:58 PM                     I found my problem. I must have not reset dolby level on that projector last month when I had swapped LED power supplies. I set level today and all is well. Louis, you yourself know all I've done with that theatre in the past month. Thanks guys  |  IP: Logged

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