Hi,
I have a faulty Valley 440 comp/lim on my bench that needs repair, but I really can't understand where is the problem.
Manual and schems are here: http://www.galaxyaudio.com/products/PDF2/440.pdf
Basically it has a strange behaviour, sometimes there's no output signal, other times there's out signal but no compression, led bars go at full scale after some juggling with pots, etc.
I started looking at psu and it looks good, I have approx +15V and -15V from 7815/7915 to ground, but when I try to measure voltage from +15 to -15 my meter goes mad and after a while the fuse burns...
Also if I measure +V and -V on opamps I get approx +15V instead of the expect 30...
Any ideas?
Thanks
Frank
I have a faulty Valley 440 comp/lim on my bench that needs repair, but I really can't understand where is the problem.
Manual and schems are here: http://www.galaxyaudio.com/products/PDF2/440.pdf
Basically it has a strange behaviour, sometimes there's no output signal, other times there's out signal but no compression, led bars go at full scale after some juggling with pots, etc.
I started looking at psu and it looks good, I have approx +15V and -15V from 7815/7915 to ground, but when I try to measure voltage from +15 to -15 my meter goes mad and after a while the fuse burns...
Also if I measure +V and -V on opamps I get approx +15V instead of the expect 30...
Any ideas?
Thanks
Frank