This is a follow up to my earlier post, to do with boss cs-3 Compression sustainer.
The attack function doesn't appear to work - due to a poorly done mod attempt.
i thought i'd fixed it but i hadn't.
What seems to bee happening is that there is no noticeable effect unless the sustain is turned up, and increases as its turned.
ok what could i have fried? i assume fried by over heating will mean open circuit , is that correct?
from the following circuit diagram...
1. i cannot have fried ic4a as the sustain control works.....
2 . posssible ic 3 got fried , thouht i didn't solder on a trace attached direcly to this chip ( dbx c1252h2 ja 6054 , its an old mij cs-3)
3. i did colder on a trace to ic1 but i still get normal levels of signal through, from the circuit it wouldn't seem to be obvious
4 im wondering if q8 or q7 might be damaged, though again i didn't solder directly to them.
I tried to replace the caps c6 1uf and c4 1uf with film caps....
c4 goes to pin 1 of ic3 via a 33k resistor, c4 goes to pin 3 of ic4a via 100k resistor.
any one can explain how this circuit works and what migh cause loss of attack control ?