Beovision 3-32

15th August 2008

This set was stuck in standby and did not respond to the remote control. The main HT line did not come up to its full voltage briefly when power was first applied as it is supposed to so a short circuit in the line output stage was suspected. Various items were checked and cleared without success until the set was tried with the tube base panel removed from the tube. The set then started up normally, without a picture of course. Loss of vacuum in the tube as then suspected but applying 6V to the heater pins resulted in the normal heater glow in all three guns so this was discounted. Meter checks showed leakage between pins 5 (G1) and 9 (GND) of the tube. Discharging a 4700 uF capacitor charged up to 50V across these two pins resulted in a bright purple flash in the tube neck, after which the short circuit was gone. On reconnecting the tube base panel a good picture was obtained. [BeoVision 3-32]