Apple lc 580.performa 580cd Manual Do Serviço

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 Adjustments
Geometry - 13
 
Focus
 
1 Run Display Service 
Utility to display the 
Focus test pattern.
2 Using a flat-head plastic 
adjustment tool, adjust 
the focus control on the 
flyback transformer 
until the Focus test 
pattern reaches the best 
center-of-screen 
performance.
Adjustment
Controls
Flyback
Transformer
Focus
Focus Control