Apple studio display 17adc adjustement User Manual

							 
 
 
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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 ShapeNot NormalNot Normal 
						

							 
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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 grills vertical wires could vibrate 
much like a guitar stringÑcausing display quality problems for several 
minutes.
These horizontal stabilizing wires are normal and cannot be adjusted out.  
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.
Stabilizing
Wires 
						

							 
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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 
controls. If the display changes (for better or worse) when you move it to 
another location, the environment is the source of the problem. Move the 
monitor or the distortion-causing object.
CRT tolerances allow for some distortion. Additional distortion can be 
caused by magnetized metal objects (desks, Þle cabinets). Rotate the 
monitor or move it to a different location if you notice bowing of the screen 
shape or bent edges. You can also use the Monitors control panel to make 
geometry adjustments to optimize the screen display. 
						

							 
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Making Screen Adjustments With the Monitors Control 
Panel
 
The Monitors control panel is used to make adjustments to the viewable 
area of your screen display. Because adjustments are made to the screen 
before the display leaves the factory, you might never have to use the 
Monitors control panel. 
You can open the Monitors control panel by pressing the button on the 
lower left of the display bezel.
From the Monitors control panel, you can select four main buttons: Monitor, 
Geometry, Color, and Preferences. From these buttons, you can select the 
following settings or adjustments: 
Color Depth 
Resolution
ContrastHeight/Width
Position
Pincushion
Rotate
Keystone
Parallelogram
Bow
Convergence
Degauss
Factory SettingsWhite Point
Gamma Curve
Ambient Light
Import/Export
Preferences
Recalibrate
ColorSync ProfileTheater Mode
Press to open Monitors control panel 
						

							 
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Monitor Button
 
When the Monitors control panel Þrst opens, the Monitor button is selected. 
From this window, you can change the following settings:
¥ Color Depth 
¥ Resolution
¥ Contrast
Under Color Depth, the setting Millions of colors is the default setting. This 
gives your display the widest range of color options. If you ever want a 
narrower range of colors (required by some applications), you can 
temporarily set the Color Depth to Thousands. And if you want your display 
screen to show colors as shades of gray only, select 256, and then select 
Grays. All of these settings can be changed in the Monitors control panel at 
any time. 
Under Resolution, you can select another screen resolution. The number of 
screen resolutions available depend on the amount of video memory 
(VRAM) in your computer and the capabilities of your display.
To adjust the contrast, drag the Contrast slider control left or right to 
decrease or increase the screen contrast. 
						

							 
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Geometry Button
 
When you click Geometry, the Monitors control panel looks like this:
From this window you can change settings to adjust the shape of the 
viewable screen area.   
Important:   
 Do not change geometry settings unless your displayÕs screen 
shape is distorted and you have already tried: 
¥ restarting your system
¥ allowing the display to warm up for 30 minutes to see if the screen 
distortion goes away on its own
¥ unplugging and moving away any electrical motor devices, such as 
fans, away from your monitor 
Factory Settings
 
Important:   
 Clicking the Factory Settings button (in the lower right corner of 
the Geometry window) resets only the geometry controls and convergence. 
The screen image returns to the factory preset levels of geometry and 
convergence for the current screen resolution. 
Adjustments you have made in the Monitor, Color, or Preferences windows 
are not reset when you click Factory Settings. 
						

							 
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Height/Width
 
Normal height and width on an Apple CRT display leaves a black border of 
approximately one-half inch (13 mm) around the screen image.
If the display image appears too short or too narrow (compressed vertically 
or horizontally), you can use the Height/Width controls to adjust the display.
1. Select Height/Width.
2. Move the mouse pointer over the outer edge of the screen rectangle in 
the picture of the display.
3. Drag the left or right side of the screen rectangle to change the width.
4. Drag the top or bottom edge of the screen rectangle to change the 
height.  
Note:  
   Instead of dragging the screen rectangle, you can adjust height 
and width by clicking the arrow buttons for incremental movement. 
						

							 
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Position 
 
The Position selection refers to the centering of the screen image. If the 
image appears shifted up/down or right/left only, adjust it using the Position 
controls. Keep in mind that if you then move the monitor to another location 
you may need to readjust the controls.
1. Select Position. 
2. Move the mouse pointer over the picture of the display.
3. Drag the screen rectangle to center the image.  
Note:  
   Instead of dragging the screen rectangle, you can also adjust 
the image position by clicking the arrow buttons for incremental 
movement. 
						

							 
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Pincushion
 
Pincushion is present if the screen image appears bowed in or bowed out 
on both sides. If just one side is affected, refer to the Bow section.
1. Select Pincushion. 
2. Move the mouse pointer over the picture of the display.
3. Drag the left or right side of the screen rectangle to adjust the image. 
Note:  
  Instead of dragging the screen rectangle, you can adjust the 
shape of the image by clicking the arrow buttons for incremental 
movement. 
						

							 
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Rotate
 
If the entire screen image appears off balance, use the Rotate controls to 
correct it.
1. Select Rotate. 
2. Move the mouse pointer over the picture of the display.
3. Drag the screen rectangle clockwise or counterclockwise to rotate the 
image.  
Note: 
  Instead of dragging the screen rectangle, you can rotate the 
image by clicking the arrow buttons for incremental movement.