Beocord VX 5000/VX 5500

15th August 2008

Picture faults of all descriptions in these machines are normally due to defective electrolytic capacitors. The capstan motor, IF unit, modulator panel and signal routing/YC processing panel should all be carefully inspected for leaking electrolyte. A quick check can be made by re-soldering one pin of each capacitor, a hiss of boiling liquid and a strong smell indicate a defective component. Frequently large numbers need to be replaced, due no doubt to the high internal temperatures that these machines operate at. In one case however replacing many capacitors failed to cure a random line pulling effect that spoiled an otherwise excellent picture. Connecting the CVBS input of a monitor directly to the negative end of C241 (47uF) gave the same fault symptoms, clearing the signal routing circuitry from suspicion. The fault was eventually cured by replacing the luminance processing hybrid chip IC201 (HT4847F). [Beocord VX 5000, Beocord VX 5500]