Hello, I also have a Beocord 9000 device encountering a similar issue with the Rec Cal not stopping. After a preliminary check, I used a multitester with a diode test function. When I applied it to pin 2 of 13P24, the Rec Cal function worked correctly. I’m not proficient in technical matters, and my capabilities only extend this far. I hope fellow enthusiasts can provide assistance.
YouTube link of my device: https ://youtu.be/Zur4gGsA4pY