Beogram 4002

16th June 2013

In this early version of the Beogram 4002 (AC motor type) the arm would move across when “Play” was selected and stop in the correct position but would then not lower onto the record. After ensuring that the linkage was not seized, attention was turned to the drive circuit for the magnet coil 0RL1. 22V was present at the collector of 0TR4 (TIP41A) and 1R60 was overheating badly. These two observations pointed towards 0TR1 being open circuit, which it proved to be. A replacement returned the cueing system to normal functioning. [Beogram 4002, Beogram 6000]