05-07-2022, 08:47 PM
Hello,
I am working on 49-1401 that has no audio output. All tubes test good. Capacitors replaced. Resistors test good. The schematic has a very nice troubleshooting chart which I have attached. Using a signal generator, I get no audio at test points A and E. I do get audio a point C, but not point D. A tried another 6AQ6 with no difference. The 10meg resistor is shown to go between pins 1-2. On my unit the 10meg go to pin 1 and pin 6 with a wire to pin3. Pins 2 and 3 tied together. The schematic is difficult to read clearly. Should pins 2-3 be tied together? Should the 10meg go to pin 2 via pins 6 and 3? Any help is appreciated. A photo of the wiring on tube 6AQ6 might help as well. Thanks
I am working on 49-1401 that has no audio output. All tubes test good. Capacitors replaced. Resistors test good. The schematic has a very nice troubleshooting chart which I have attached. Using a signal generator, I get no audio at test points A and E. I do get audio a point C, but not point D. A tried another 6AQ6 with no difference. The 10meg resistor is shown to go between pins 1-2. On my unit the 10meg go to pin 1 and pin 6 with a wire to pin3. Pins 2 and 3 tied together. The schematic is difficult to read clearly. Should pins 2-3 be tied together? Should the 10meg go to pin 2 via pins 6 and 3? Any help is appreciated. A photo of the wiring on tube 6AQ6 might help as well. Thanks
