Soundcraft SPIRIT FOLIO Notepad; fixing distorted stereo input
A few seconds after switching on, left channel clipped the signal 0:00.
Green wire on stereo 1/4" jack (0:08) is connected to black RCA (0:14), which is connected into left side of stereo STE-A input - distorted signal 0:22.
Red wire on stereo 1/4" jack (0:29) is connected to red RCA (0:35), which is connected into right side of stereo STE-A input - beautiful signal 0:43.
FOLIO Notepad PCB 0:50. Stereo IN - OUT section 0:57.
Left 5532 (which represents stereo STE-A input) is faulty 1:03. IC5 was removed 1:10 and inserted 8-pin socket 1:17. I didn't have 5532 at the time and used TL072 which works just fine.
Now both channels are working as they should 1:32 to 2:07.
And Debussy is also satisfied.
IIRC two inputs of this faulty IC5 were short-circuited, so probably one or both input protection diodes were burnt out
https://html.alldatasheet.com/html-pd...
It is interesting to note that this little mixer has also the option of connecting the turntable on both stereo inputs (STE-A, STE-B).
Debussy's Faun was played with Korg M1-EX, patch Hard flute I-72, but actually I changed multisound 138-Hard flute to 27-Pan flute (which exists also in standard Korg M1 multisound list).