UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post

bionicmerlin · 5th Apr 2019, 12:36 pm

Had a little set back .the set died altogether but traced to a faulty 220k resistor on the power supply.
Can someone comferm my readings that the BU105 is suspect as I’m getting what appears to be 136 volts on the base when I think it should be less than 1 volt.
Other transistors appear to have the correct or not far out voltages going on the circuit diagram.
I also believe the BU105 should be upgraded to a 205 . Thanks Andy

5th Apr 2019, 12:36 pm	#32
bionicmerlin Heptode Join Date: May 2010 Location: Warminster, Wiltshire, UK. Posts: 682	Re: Philips 19 inch tv info please Had a little set back .the set died altogether but traced to a faulty 220k resistor on the power supply. Can someone comferm my readings that the BU105 is suspect as I’m getting what appears to be 136 volts on the base when I think it should be less than 1 volt. Other transistors appear to have the correct or not far out voltages going on the circuit diagram. I also believe the BU105 should be upgraded to a 205 . Thanks Andy