ViewSonic VLCDS25973-2W Service Manual page 24

5-6 Function Test and Alignment Procedure
All Modes Reset
5-6.1
You should do "All Mode Resent" (Refer to Chapter 6-3) first. This action will allow you to erase all end-
user's settings and restore the factory defaults.
Auto Image Adjust
5-6.2
Please select and enter "Auto Image Adjust" function on Main Menu to see if it is workable. The "Auto
Image Adjust" function is aimed to offer a better screen quality by built-in ASIC. For optimum screen quality,
the user has to adjust each function manually.
Firmware and DDC
5-6.3
Test Pattern: Burn In Mode (Refer to Chapter 6-3)
- Make sure the F/W is the latest version.
- Make sure the S/N is the same as the Spec. label.
- Make sure the model name is correct.
Fine Tune and Sharpness
5-6.4
Test Signal: 1280*1024@60Hz
Test Pattern: Line Moire Pattern
- Check and see if the image has noise and focus performs well eliminate visual line bar.
- If not, readjust by the following steps:
(a) Select and enter "Fine Tune" function on "Manual Image Adjust" to adjust
(b) Then, select and enter "Sharpness" function to adjust the clarity and focus
Boundary
5-6.5
Test Signal: 1280*1024@60Hz
Test Pattern: Horizontal & Vertical Line Thickness Pattern
-
-
(a) Select and enter "Manual Image Adjust" function on OSD Main Menu.
(b) Then, select and enter "Horizontal Size" or "Horizontal/Vertical Position"
White Balance for GM5321 scaler
5-6.6
Test Signal: 1280-1024 @ 60Hz
Test Pattern: 16 Gray Scale
-
R,G,B, Colors Contrast
5-6.7
Test Signal: 1280*1024@60Hz
Test Pattern: R,G,B Color Intensities Pattern and 16 Gray Scale Pattern
- Check and see if each color is normal and distinguishable.
- If not, please return the unit to repair area.
Screen Uniformity and Flicker
5-6.8
Test Signal: 1280*1024@60Hz
Test Pattern: Full White Pattern
- Check and see if it is in normal condition.
ViewSonic Corporation
the image to eliminate visual wavy noise.
of the screen image.
Check and see if the image boundary is within the screen frame.
If not, readjust by the following steps:
function to adjust the video boundary to be full scanned and within screen frame.
Refer to Chapter 6-3
Confidential - Do Not Copy
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VP191b/s-1/-2