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   alt.electronics      Electronics design, repair, worship, etc      7,706 messages   

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   Message 6,660 of 7,706   
   Computer Nerd Kev to petrus bitbyter   
   Re: Monitor Sync Signal in 80s Arcade Ma   
   09 Feb 13 06:17:23   
   
   From: not@telling.you.invalid   
      
   petrus bitbyter  wrote:   
      
   > Apparently something wrong in your horizontal drive signal.   
      
   OK, so the sync signal going in is fine then?   
      
   > Most likely the   
   > line output transformer, maybe the horizontal coils but there are still some   
   > other possibilities. Be aware that the coils are current driven.   
      
   Forgive my ignorance, but if a coil or transformer failed, would this be   
   possible in such a way as for the monitor to function for the three minutes   
   it usually runs before failure. Or did you mean the components associated   
   with the the coil or transformer?   
      
   Also, if I go to repair this part of the circuit (and let's assume I'm not   
   replacing the Line Output Transformer, I don't suppose I could find a spare   
   available), I know I'll need to discharge some capacitors, but should I   
   discharge the high voltage output of the transformer as well?   
      
   Thank's for your help.   
      
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