Boss DD-2 issue : "Delay Time" knob not working

[tupinamba]

Hi everyone,
I was lucky enough today to find a DD-2 in a yard sale for 5€... But the "Delay Time" knob isn't working (whereas the other knobs work perfectly).
I made a quick check on the pot and it seems that the pot is working finely (values change when turning it) and the connections seem allright.
I'm going to look for the schematics but I thought I might get lucky if someone ever experienced this issue...
Thanks in advance!

[tupinamba]

UP ?