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K7000 19” Blowing Main Fuse

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Man it's been a while.
In the past couple years, my 1943 started playing blind. I finally got around to troubleshooting it, and found a blown main fuse. Just to check, I replaced the fuse and tried to start it with the degausser unplugged. It blew the new fuse after 20 seconds.

Per the flowchart, I checked:
  • The HOT collector is in the thousands of ohms to ground, and which rises quickly
  • D18 is not shorted
  • D19-D22 are not shorted, but have approximately the same resistance in...

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