Finally I reassembled everything and added a missing connector from the right speaker. In the beginning, the CD Player sometimes moved the head up and down without reading the disc. However, after some hours of playback it never happened again. Maybe there are some capacitors that need replacement?
Unfortunately it seems the FM-Tuner does work since it is not possible to find a station. MW and LW are working, so the antenna (yes I first forgot to add the small metal plate from the PCB to the antenna) is working. Since I have no frequency generator it might be hard to recalibrate the tuner.
It has now a special place above the chimney and I am going to start with the second unit.
