Hey all, back to my LOTR LED question & identified solution - adding the LED OCD board...
I installed the LED OCD board last night, easy installation - works great & love the lighting effect!
But… there is a slightly concerning side effect. There is an audible buzz in the speakers now associated with the LED driver ?? Most noticeable when in attract mode and the lights are cycling on/off/etc. When there is no audio being played you can hear the buzz cycling perfectly in sequence with the lights. The more lights that are on, the louder it is.
I disconnected the board & rewired as stock & no noise at all when the lights are sequencing, dead silent. But with OCD card installed in circuit, its back there again.
Pretty low level, but if you are standing right at the machine, when the lights really kick in , you notice it – backboard and cabinet speaker. Not as loud as the speaker hiss was - but distinctly noticeable since it varies in pitch/intensity with the LED lighting load
I just got rid of the darn speaker hiss, and now this, ugh...
Can you advise if this is expected/normal or if I possibly have a bad board or if there a way to filter, is it a grounding issue with the OCD board?
It bothers me mostly because it should not be happening, but now that I hear it, it will annoy me until solved or I may pull the board out, which would be a bummer. Appreciate any/all thoughts.