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Troubleshooting Symptom Charts/Miscellaneous

(Continued)

- 19

Miscellaneous

(Continued)

Monitor emits

snapping sound;

raster blinks for an

instant

Note:

This symptom, caused by foreign particles inside the CRT,

normally occurs only in new monitors. If the symptom persists

after 40 hours of operation, there is a hardware problem.

1 Replace power supply.

2 Check to see if arcing on main deflection board is cause. If so,

replace main deflection board. If not, CRT is defective.

Picture color uneven Adjust rotation and color uniformity. Refer to “Geometry’’ in the

Adjustments chapter.

Focus blurry on one

side of screen

1 Adjust focus. Refer to “Convergence” in the Adjustments

chapter.

2 Replace main deflection board.

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Apple Multiple Scan 20 Display Specifiche Pagina 40