Sony Spaceship Two part 1

We had this old Sony Micro Hifi thing which was always a bit problematic. The CD door which was electrically operated broke quite early in its life. I fixed it a couple of times, then recently the belt broke making the door impossible to operate. Additionally it started making a crackling sound and it was destined for the bin. I was on my way to throwing it out when I turned it sideways... and...…