Beocenter 4000 (early type)

23rd December 2009

In all cases where the cassette section gives odd results that cannot be easily explained it is a good idea to check the various relay contacts in the signal sections. Removing the relays one by one and checking the resistance of each pole with a meter, powering the coil where necessary with a bench power supply or battery, is one method. In one recent case the recorder would play a cassette normally but recordings with Dolby NR sounded odd as the signal was not being encoded on one channel, a single dirty contact being the cause. With care, the relays can be dismantled and cleaned which is fortunate as they are not easy to substitute with modern types. [Beocenter 4000]