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I finally got around to messing with the Beltron again. I gave up on the small color adapter it's too hacked up. Atleast I can use the other 2 sockets. The next problem is, when I plug it in thebshorts light is constantly flickering, and the heater voltage is pinned at 15 volts, the rheostat has no effect. I assumed because of age the caps might be going out. I opened it up and whoever worked on it was a savage. They replaced one of the caps, and fried the associated traces and jumped them with wire. I replaced both 150uf caps and re soldered as many joints as I could. Then I noticed one of the light bulb sockets was broken. I tried to solder it back together but when when I turned it on the light started flickering and sizzling, one of the ceramic resistors started to smoke. I quickly unplugged it. I let it cool and checked the resistors the good news is they're 1000 ohm resistors and they all track at about 998. The next thing I did was check the voltage coming out of the caps one is 167 volts the other is 365 I think, I have to recheck it. The next thing I did was try to check the diodes. I checked the two rectifier diodes but I didn't remove them from the circuit board, one tested like a diode should the other one seemed open. Then I checked the diode that goes to the very first gauge that one also tested as if it was open. I'm wondering if this would be causing all my trouble. Does anyone have a schematic for this? The only thing I was able to find was a hand drawn one and I'm not sure how accurate it is. According to the drawing the main power diodes are 1N4005, I happen to have some 1N4007's on the bench Can I use them to replace them? I haven't been able to read the one on the gauge I'm going to desolder it and check, but it looks much heavier Duty than the two for the power rectifying. I did check and clean the wire wound pot, it actually reads very well between two ohms and 24 ohms so I don't believe that's the problem. I also dug through my spare parts and found a socket that looks just like the original and replaced it so at least the light socket is no longer a problem
Last edited by Aperna1985; 01-24-2025 at 06:03 PM.
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