1

CP4500 Stereo Bus Compressor / Re: Setup Help THRESHOLD potentiometer counter clockwise reduces the out ?

« on: September 01, 2021, 11:59:50 PM »

Hi Jean-Pierre,

thanks for the hint. Turns out the problem was with the test pins. Once I applied solder from the top, everything works as it should.

On this build either the pins were bigger or the holes smaller. I remember them sliding in easily on the mp573 and cp5176. This time I actually had to widen the holes a little to get them even in. Maybe there was not enough space for the solder to flow through to the top side.

Maybe this is of help for others.

What a fantastic sounding unit! Makes me regret having spent money on plugin compressors.

Thanks,
Philipp

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CP4500 Stereo Bus Compressor / Re: Setup Help THRESHOLD potentiometer counter clockwise reduces the out ?

« on: August 30, 2021, 10:20:11 PM »

Sorry, had 5-8 reversed.

So:
1,2,3,5,6: 0V
4: -15.9V
7: +2.9V
8: +16V

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CP4500 Stereo Bus Compressor / Re: Setup Help THRESHOLD potentiometer counter clockwise reduces the out ?

« on: August 29, 2021, 03:11:19 PM »

Dc Voltages at U21 pins with Threshold at +15 and makeup at 0 and 0 input:

1,2,3,7,8: 0V
4: -15.9V
5: +16V
6: +2.9V

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CP4500 Stereo Bus Compressor / Re: Setup Help THRESHOLD potentiometer counter clockwise reduces the out ?

« on: August 29, 2021, 01:44:26 PM »

Hi,

I got board REV1.3.

I have the same issue: Level does not decrease with Threshold control.

I did the voltages check. On step 4, TP13 does not show any DC, no matter where I have the pot. The pot itself seems fine. Also checked the components U21, and R95...R99. Direction, values and joints seem fine.

What should I check next?

Thanks and regards,
Philipp