ViewSonic VG921m-2 Service Manual page 20

1.5 Function Test and Alignment Procedure
1.5.1 Memory Recall
You should do "Memory Recall" first. This action will allow you to erase all
end-user's settings and restore the factory defaults.
1.5.2 Auto Image Adjust
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.
1.5.3 Firmware
Test Pattern: Burn In Mode ( Refer to Chapter 3-2. Short Cuts Function from the
- Make sure the F/W is the latest version.
1.5.4 DDC
Test Pattern: EDID program
- Make sure it can pass test program.
1.5.5 Fine Tune and Sharpness
Test Signal: 1280x1024@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 the
image
to eliminate visual wavy noise.
(b) Then, select and enter "Sharpness" function to adjust the clarity and focus of the
screen image.
1.5.6 Boundary
Test Signal: 1280x1024@60Hz
Test Pattern: Horizontal & Vertical Line Thickness Pattern
- Check and see if the image boundary is within the screen frame.
- If not, readjust by the following steps:
(a) Select and enter "Manual Image Adjust" function on OSD Main Menu.
(b) Then, select and enter "Horizontal Size" or "Horizontal/Vertical Position"
function to adjust the video boundary to be full scanned and within screen frame.
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