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CP554 Diode bridge compressor / Re: CP554 can't pass Setup process point 6
« on: March 11, 2024, 08:35:52 PM »
Hi JPK
Everything works now
. Finally did it!
Except one thing of one of the units. I can't manage to set the meter on -8dB with the TR6 in step 12. I rechecked all of the connections between Meter - J4,a,b, and J3, alb, but no reaction on the meter with TR6 - it is stucked on - 2dB. Other than that I did the whole setup of the threshold.
I checked all of the connections between the meter - R93, D17,D16, R92,R91,R89,R90.R88, U7, U6.1 and TR6 as seen on the schematic but I can't get any result.
Also checked U6.2 connections on the
schematic.
EDIT:
Well after a couple of days of trying to find the problem I simply put the two CP554 close to one another with one being placed horizontally and the other vertical so that I could plug the PCB6 connector from the working CP554 to the other and saw that the meter went to the same position and wasn't reacting with the TR6 in the exact same way. So mounted back the original meter connector and swapped the U6 op amp, borrowing it from the working one and bingo...everything worked!
I now will have to find one OPA2134 to replace the fault one and getting this big time job done!
Well now I have two working CP554's and the sound is rocking! Although the this was the hardest project of all. I enjoyed it and learned a lot by not giving up the fight and trying to diagnose everything by myself although I am not so good in electronics...
I hope that if needed, this thread will be useful to another user!
Cheers to everybody!
Konstantin.
Everything works now
![Cool 8)](https://www.soundskulptor.com/forum/Smileys/default/cool.gif)
Except one thing of one of the units. I can't manage to set the meter on -8dB with the TR6 in step 12. I rechecked all of the connections between Meter - J4,a,b, and J3, alb, but no reaction on the meter with TR6 - it is stucked on - 2dB. Other than that I did the whole setup of the threshold.
I checked all of the connections between the meter - R93, D17,D16, R92,R91,R89,R90.R88, U7, U6.1 and TR6 as seen on the schematic but I can't get any result.
Also checked U6.2 connections on the
schematic.
EDIT:
Well after a couple of days of trying to find the problem I simply put the two CP554 close to one another with one being placed horizontally and the other vertical so that I could plug the PCB6 connector from the working CP554 to the other and saw that the meter went to the same position and wasn't reacting with the TR6 in the exact same way. So mounted back the original meter connector and swapped the U6 op amp, borrowing it from the working one and bingo...everything worked!
I now will have to find one OPA2134 to replace the fault one and getting this big time job done!
Well now I have two working CP554's and the sound is rocking! Although the this was the hardest project of all. I enjoyed it and learned a lot by not giving up the fight and trying to diagnose everything by myself although I am not so good in electronics...
I hope that if needed, this thread will be useful to another user!
Cheers to everybody!
Konstantin.