patience and a slow smooth rational approach, you don't want to make things worse after all.
is there a particular reason you don't suspect the caps?
is there a particular reason you don't suspect the caps?
i guess i found the issue, after cleaning between the pins the noise went down considerably, so to get rid of all the noise i have to desolder the ic and clean the space behind it and every joint i resoldered many times before.
no luck doing this on line #4 through, cleaned a lot but the noise didn't lowered enough.
Replaced the IC, the noise is still around, cleaned everything too... altrough the noise appears to be lower than before, is still around.
i want to die
so just what sort of test did you do to the caps in this stage??
in the immortal words of Jack Darr stop fretting the solution is there somewhere, one just has to find it!
in the immortal words of Jack Darr stop fretting the solution is there somewhere, one just has to find it!
thanks for cheering up 🙂, fortunatelly i managed to remove 90% of the noise by bypassing V+ directly to pin 8(vcc pin) so seems to be a bad trace, along with the flux and the bad transistor, also replaced the diodes and the resistors on that section just in case.
now i have to fix channel 4 which has similar issues but worse, the noise is very loud and cleaning flux didnt fix anything.
oh i forgot to mention i just measured the caps with a cheap cap meter from aliexpress, the ones with the green lcd screen, making sure the esr and the voltage loss values were ok.