Asteroids by Atari 1980 - Monitor repair

This is a repair of an Asteroids arcade game made by Atari in 1980.  The monitor was dead on this one.  These old monitors are an XY type black and white design.  In effect just a slow speed oscilloscope design with a slow phosphor in the picture tube.  Usually the output transistors are damaged due to dirty, rusted connections or dirty potentiometers on the game board.  The high voltage box is usually unstable for the same reasons. 
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