Film-Tech Forum ARCHIVE: CP650 not sending hi freq on center ch

This is topic CP650 not sending hi freq on center ch in forum Digital Cinema Forum at Film-Tech Forum ARCHIVE.

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Posted by Mike Moreno (Member # 4887) on 01-02-2019, 12:44 PM:

Hi everybody .
Happy new year for all [beer]

and thank you all for sharing your knowledge.

starting this year with a sad sorprise [uhoh]

one of my cp650 is not working fine, is not sendig hi frequency on center channel and I barely heard surrounds.
if 1 see the monitor and the center amp I can see led bars moving even with out pink noise or audio from the projector.

im not sure wich internal card replace in order to fix it.

thanks for your help and have a great year.

mike moreno
Mexico

Posted by Monte L Fullmer (Member # 2797) on 01-02-2019, 06:25 PM:

Pull cards and reseat them for starters with power off. This usually helps with a glitch like this.

Then, check the driver attached to the horn. They do love to open without notice.

Next trick is to switch inputs on the amp to see if a channel died on you, up to checking amp connections.

Pull the speaker wire off the amp assigned to the center horn and take a 9v battery and just bump the leads across the battery to see if the horn driver responds to the bumps.

I've changed out a few that suddenly let go.

Good luck.

Posted by Gordon McLeod (Member # 33) on 01-03-2019, 09:15 AM:

Is the theatre biamped if so it could be the crossover card

Posted by Stephan Shelley (Member # 8587) on 01-03-2019, 02:27 PM:

Do you have a booth monitor wired up so you can compare the amp outputs vs the processor? If so check in the booth monitor and see if it is the 650 or something between the 650 and amp output(s)or as has been suggested above a HF driver. Again with the booth monitor check the surround output. From your description of the signal present lights on the amps going up and down it might not be the 650.

Posted by Mike Moreno (Member # 4887) on 01-12-2019, 01:51 PM:

Hi
I install the cp650 in another auditorium in order to check and fails the same way.
I have to check all the internal cards.

mike morneo

Posted by Stephan Shelley (Member # 8587) on 01-12-2019, 03:19 PM:

There are only two main boards in it plus some option daughter boards that can be added. Are you using the crossover option? If so that could be where the issue is. Note that when this is used the high frequencies come out of the option connector.This can be a very busy connector depending on what options one is using.

Posted by Mike Moreno (Member # 4887) on 01-15-2019, 12:43 PM:

Hi Stephan
I am using USL external crossover.
in fact, it only has a Cat 773 installed and in error logs says Opt_out:L:missing
and if i compare the Board info from another cp650 is diferent, this one says Board: A384x and the ones that work fine says A3843.

Mike Moreno
Mexico

Posted by Stephan Shelley (Member # 8587) on 01-16-2019, 05:36 PM:

Sam Chavez, of Bay Area Cinema Products has new and used boards for the CP 650 for sale. He posts on hear.