Leaderboard

Hi, I'm finishing my MB-6582 and can't find where I messed up. Encoders work, LEDs work, buttons work but don't do what they should do. Third bottom button for example makes third horizontal LED line blink, and LED's go on and of everywhere every time I push a button (LCD menu also changes) Encoders work fine. With the matrix test every LED lights up except the Control Env LED. When I push buttons nothing happens en the LCD. No shorts on the U20, 5V on the pins coming from JD5 and 10kOhm to 5V on every pin. I have not used the BC547 transistors and have bridged across. But that should work, right? Will be great full for any insights! Cheers FC

Thanks for the info! It seems the optional sinking transistors aren't that optional. I put them in (used BC337) and now all works. Cheers FC