Page 1 of 1
C84 died after 5 years
Posted:
Tue Apr 23, 2013 5:57 pmby mltamisin
One of my C84's just bit the dust. Weird because it worked for years. Any ideas? I'm not getting any sound unless I slam it and its noisy and barely audible. Switch go bad? I reflowed the solder on the switches just in case..... swapped slots if it were a bad power ribbon cable but all is fine there. I've sent my entire build to Tim 4 years ago for a PSU update and it came back in tip top shape and he checked the build so I know the build was done correctly. It's never been moved. I know it's only been about 4 months since I've used it to mic some toms.
Re: C84 died after 5 years
Posted:
Wed Apr 24, 2013 11:09 amby tpryan
What version is it?
What are the voltages at pins 1, 4, 7, and 8 of each op-amp?
Re: C84 died after 5 years
Posted:
Wed Jul 17, 2013 9:10 amby mltamisin
How do you check voltage on the legs of the opamps?
Re: C84 died after 5 years
Posted:
Fri Jul 19, 2013 8:55 amby twelvetone
Put the negative lead of your meter at ground and the positive lead at the pin of the op amp. The DC reading is your voltage at that pin.
Re: C84 died after 5 years
Posted:
Tue Oct 29, 2013 11:59 amby mltamisin
Okay. Board is Revision 1.9.1. Finally got around to testing the opamps:
U1:
1=32mV
4=-18V
7=36.5mV
8=18V
U2:
1=389mV
4=-18V
7=.41V
8=18V
U3:
1=11.62V
4=-18V
7=15.3mV
8=18V