Apple lc 580.performa 580cd Manuale Di Servizio

 

 Troubleshooting

First Checklist/ - 2

 

First Checklist

 

  Read this checklist before you replace a module. Avoid 

needless module replacement.

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• The CRT raster will not always resemble a perfect rectangle. 

CRT tolerances allow for some distortion. Additional distortion 

can be caused by magnetized metal objects (desks, file 

cabinets, etc.). Move the unit to a different location if you 

notice raster bowing or bent raster edges.

• Jitter, faint lines, or screen movement can be caused by 

external interference such as electronic devices and 

fluorescent lights. Move the unit to another room or building to 

help determine if external interference is the source of the 

problem.

• A misadjusted screen can mimic the same symptoms as analog