ViewSonic VG921m-2, Service Manual

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ViewSonic Corporation Confidential - Do Not Copy
VG921m-2
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
button(s) )
- 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.