Jerry Scaduto
Member
Hello All. I am working on a Arctic thunder with a NT-3602 in it. The screen is showing a thin brite vertical line in the center. I have spent much time on this and not gotten anywhere. I have swapped out the flyback with a known working fly, neckboard, Q402 (HOT), re-flowed the 4 pins for the yoke. I know the tube and yoke are fine because I pulled the chassis from it's twin and put it in there to verify. I have those 3x headband goggles and have verified every square inch of the section.
One wierd thing: I am measuring 90 volts on the B+ (which I think should be 120 or so volts)and 15 volts on the other diode (which should be around 25 volts) on the power supply. When I raise the voltage, the voltages drop! I think something is loading down my board, but I cannot figure this out because I have neck glow, I have high voltage.
The heatsink where the Q402 (HOT) is mounted to gets VERY VERY HOT to the touch quickly! No other components get hot. I swapped the HOT, but the same results.
I heard that a forum member on here has a neotec troubleshooting guide, but I could not find it. I contacted neotec, and they emailed me a poor copy of the schematics. I did find a 27E book in my drawer, and it seems to be almost the same.
I appreciate any help that can be offered.
Thanks
One wierd thing: I am measuring 90 volts on the B+ (which I think should be 120 or so volts)and 15 volts on the other diode (which should be around 25 volts) on the power supply. When I raise the voltage, the voltages drop! I think something is loading down my board, but I cannot figure this out because I have neck glow, I have high voltage.
The heatsink where the Q402 (HOT) is mounted to gets VERY VERY HOT to the touch quickly! No other components get hot. I swapped the HOT, but the same results.
I heard that a forum member on here has a neotec troubleshooting guide, but I could not find it. I contacted neotec, and they emailed me a poor copy of the schematics. I did find a 27E book in my drawer, and it seems to be almost the same.
I appreciate any help that can be offered.
Thanks