apple sd17adc_adj_guide free download

File name sd17adc_adj_guide.pdf

Apple Studio Display 17 (ADC) Screen Adjustment Guidelines This document describes how to evaluate your screen display and make display adjustments, if necessary. What Should a Normal Screen Display Look Like? Shape For a monitor that contains a CRT (cathode-ray tube), the normal screen display should have a uniform shape. That is, the rectangular screen image should have about one-half inch (13 mm) of black border around all four sides. Normal Shape Not Normal Not Normal Two Horizontal Lines Most CRT-based Apple monitors contain a "tron" style tube. This display contains a Mitsubishi Diamondtron tube, which uses an aperture grill. Electron beams pass through the aperture grill to display the screen image. Two stabilizing wires, which are thinner than a human hair, can be noticed on a light-colored background screen as light gray horizontal lines across the entire width of the display image. The stabilizing wires decrease the vibration of the aperture grill that can occur when the display is bumped. Without the stabilizing wires, the aperture grill's vertical wires could vibrate much like a guitar string--causing display quality problems for several minutes. These horizontal stabilizing wires are normal and cannot be adjusted out. Stabilizing Wires Colors When you select a single-color screen, you should see no distinct color blotches or areas that are dimmer than the rest of the screen. If you do, check if the same areas of the screen are dim when you select other single- color images. Refer to the Degauss section in this document or Mac Help for more information. 2 - Apple Studio Display 17 (ADC) Screen Adjustment Guidelines What About Magnetic or Electrical Interference? Before assuming that your display requires adjustment or repair, check for magnetic or electrical interference. Fluorescent lights, computers, other monitors, or electronic appliances such as coffee makers and copy machines can cause screen distortion. Move the monitor to another room or building to determine if external interference is the source of the problem. If the full-screen image has shifted up/down or right/left only, adjust it using the geometry controls in the Monitors control panel. Keep in mind that if you then move the monitor to another location you may need to readjust the contro