From: davebr@modularsynthesis.com   
      
   I have a 478 Mystic that works fine most of the time but occasionally will   
   blow the 32V breaker.  Since it works most of the time I thought the breaker   
   might be weak so I removed it and tested it and it always blows over 2A.  I   
   pulled both the magazine    
   and gripper motors and rebuilt them.  I was able to drop the current from   
   about 300 mA per motor down to 180 mA.  I monitored the current by looking at   
   the drop across a 10R resistor and it looked very uniform so I don't believe I   
   have any open or    
   shorted windings in either motor.   
      
   If I select a dozen records, it might play them all or somewhere in that set   
   it will blow the breaker.  When I reset the breaker the gripper motor starts   
   and all is well so the issue appears to be at the start of the gripper motor   
   cycle.   
      
   I'm thinking it is NOT a motor issue but could be something else.  Because it   
   is so intermittent it will be hard to track down.  I have the schematics for   
   the 480 and assume the mechanism power supply board is the same.   
      
   In looking at the schematics I can see some possibilities:   
   Weak or bad MOV   
   Leaky drive transistors   
   Microswitch issues or alignment   
   Sticky relay   
   Something temperature related (breaker heats up)   
      
   Any thoughts, tips, or suggestions of what I might check or how to proceed?   
      
   Dave   
      
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