Digitech 2101 compressor

Tube or solid-state, this section goes to eleven!
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jmpj45
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Post by jmpj45 »

Hello I was wanting to see if somebody could tell me how this compressor works in the 2101 . It doesn’t work only in bypass. If I turn it on it turns off all the sound. I was doing the compressor setup from tube tester sight you should be able to turn p2 trimmer until you get 0vdc or +or- 30mV on pin 1 of u9a. All I get is around 9vdc. So I changed p2 trimmer and u9a with new ones hoping that would fix it that didn’t do anything. If someone could look at the schematic tell what causing we’re I can’t adjust p2 trimmer or something else on the schematic I should be looking at. We’re I can fix it and get it working. Thanks
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bow_and_error
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Post by bow_and_error »

Check the voltages on the +12V & -12V rails (the other side of R121 & R122).

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jmpj45
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Post by jmpj45 »

Ok I’ll check thanks. I wonder if u27 has gone bad dbx 2155.

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mictester
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Post by mictester »

I've never had a DBX chip fail. It really isn't likely to be that!
"Why is it humming?" "Because it doesn't know the words!"

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Post by bow_and_error »

jmpj45 wrote: 23 Oct 2021, 22:48 Ok I’ll check thanks. I wonder if u27 has gone bad dbx 2155.
What were the +12V & -12V rail voltages?

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Post by jmpj45 »

Finally found the problem u62 was bad solder a new in works perfect now. Thanks for the help

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