C414 XLII - which component responsible for polar patterns?

[Sisu MT]

Does anyone know which ICs on the main PCB control the polar pattern and other switches on the c414 XLII? I've got two main PCBs, one of them passes sound, but the switches won't change the lights And it's stuck in Omni. The other doesn't pass sound, but the switches/lights work fine. If it's easier to fix the PCB that doesn't pass sound, I'm up for that, but not really sure how to troubleshoot these boards. Anyone have any suggestions? Thanks, Pat

 

[Whoops]

Auchh those are some horrible SMD pcb's,
Now I know why I was never amazed by the sound of my c414 XLII pair, the mics always sounded much worse than the 414 B-ULS.

I wish you can get a schematic for those because being all smd those will not be easy to fix or to trace