CP65 remote fader / remote muting question

[Emiel de Jong]

I am building a remote fader / control box for the CP65. I did some tests today: remote switching (all through J18) works, the indicator leds of the different formats light up as they should be. When I connect the leds that indicate remote fader selected and muting something strange happens: the leds that indicate muting, both on the CP65 itself and on the remote control, are now on all the time: constantly when not muting and flashing high/low when muting. Also the led on the CP65 itself that indicates local fader selected is now on all the time: at a lower level when remote fader is selected but not off.
I connected all leds on the remote control to the different ID lines and ground (line 12). Is this not correct? Or has anybody an idea what could be wrong?

[Sam Chavez]

My advice is to start with just the remote fader potentiometer connected to the backplane as shown in the Dolby CP55/65 manual and once you know the CP65 remote switch on the front door works correctly, ie., remote fader is operating, proceed from there.

I believe there's a jumper on the 443 that disables the remote fader switch so you don't accidentally send the fader to nowhere. I worked on all this many tears ago but that's all I recall for now.

Good luck.

[Alan Lyman]

Hi

you need to tie the MUTE and FADER-LED´s to +15v.The FORMAT LEDS are tied to ground.

Alan

[Emiel de Jong]

Thanks Sam and Alan. Exactly what Alan wrote: that did the trick. It's all working now.