Film-Tech Forum ARCHIVE: CP55 trouble

This is topic CP55 trouble in forum Film Handlers' Forum at Film-Tech Forum ARCHIVE.

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Posted by Josh Jones (Member # 447) on 10-18-2001, 03:57 PM:

I have a CP 55 with SR that is stuck in mute mode. The processor wakes up in non-sync like it should, but the mute cannot be disabled by pressing the mute button. the local/external fader panel will switch to external, but wont switch back. I hate running bypass.
any help would be appreciated

Josh

Posted by Brad Miller (Member # 2) on 10-18-2001, 04:14 PM:

Do you have any form of automation hooked up to the unit? If memory serves, there are a couple of different automation boards on the back of the unit. Which one do you have?

Posted by Josh Jones (Member # 447) on 10-18-2001, 04:48 PM:

I was a bit suspitious of that board, so I removed it. It didnt help at all.

But, if it helps, the board number is cat. 231

Josh

Posted by Pete Naples (Member # 761) on 10-18-2001, 04:49 PM:

I have had this exact problem. The mute switch itself was faulty. Replaced and off we went. Also check the ribbon cable and plug from the front panel card, and the control logic card.

Posted by Josh Jones (Member # 447) on 10-18-2001, 05:07 PM:

I will give that a try Pete,

Thanks

Posted by Josh Jones (Member # 447) on 10-18-2001, 09:44 PM:

well, I am going to have a replacement cat 243 card shipped out, hopefully here tommorrow. after comparing this units function with another cp 55, we think the control card is at fault. after trying to trip the mute with the automation board and failing, the 243 is about the only option left. I'll keep you updated,

Josh

Posted by Steve Guttag (Member # 268) on 10-19-2001, 04:30 PM:

Here is another thing you can try when troubleshooting...you say you compared it to another CP-55....did you take your board and try it in the other CP-55? It is a sure fire way when you have multiple units to try!

Steve

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"Old projectionists never die, they just changeover!"

Posted by Paul G. Thompson (Member # 655) on 10-19-2001, 10:46 PM:

Josh, with the readings we took over the phone, I also suspect it is the CAT 243. I am not sure if the card was shipped Blue label or Von Ryan's express.

Paul