Apple 550 Manuale Utente

 

 Troubleshooting

Symptom Charts/Video

 

 (Continued)

 

 - 6

 

Flashing or wavy 

screen or monitor 

emits high-pitched 

noise

Replace analog board.

Raster size too short/

tall or narrow/wide

1 Adjust horizontal or vertical size control. Refer to 

Adjustments chapter.

2 Replace analog board. 

Linearity bad (size of 

text/graphics differs 

at top, bottom, or 

sides of screen)

1 Perform video adjustments. Refer to “Video” in Adjustments 

chapter.

2 Replace analog board.