Adjusting Procedure - ViewSonic VE175-3-1 VS 10231 Service Manual

5. Adjusting Procedure

5-1 Product
17" LCD Monitor
5-2 Test Equipment
Color Video Signal & Pattern (or PC with SXGA resolution)
5-3 Test Condition
Before function test and alignment, each LCD Monitor should be run-in and warmed up for at least
30 minutes with the following conditions:
(a) In room temperature,
(b) With full-white screen, RGB, and Black
(c) With cycled display modes,
640x480 (H=43.27 kHz, V=85Hz)
800x600 (H=53.7 kHz, V=85Hz)
1024x768 (H=68.67 kHz, V=85Hz)
1280x1024 (H=79.97 kHz, V=75Hz)
5-4 Test Display Modes & Pattern
5-4.1 Compatible Modes
Analog Digital
1. 640 x 350 @ 70Hz, 31.5kHz
2. 640 x 480 @ 60Hz, 31.5kHz
3. 640 x 480 @ 67Hz, 35.0kHz
4. 640 x 480 @ 75Hz, 37.5kHz
5. 640 x 480 @ 72Hz, 37.9kHz
6. 720 x 400 @ 70Hz, 31.5kHz
7. 800 x 600 @ 56Hz, 35.1kHz
8. 800 x 600 @ 60Hz, 37.9kHz
09. 800 x 600 @ 75Hz, 46.9kHz
10. 800 x 600 @ 72Hz, 48.1kHz
11. 832 x 624 @ 75Hz, 49.7kHz
12. 1024 x 768 @ 60Hz, 48.4kHz
13. 1024 x 768 @ 70Hz, 56.5kHz
14. 1024 x 768 @ 72Hz, 58.1kHz
15. 1024 x 768 @ 75Hz, 60.0kHz
16. 1024 x 768 @ 85Hz, 68.67kHz
17. 1280 x 1024 @ 60Hz, 63.4kHz
18. 1280 x 1024 @ 75Hz, 79.97kHz
5-4.2 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.
5-4.3 Firmware
Test Pattern: Burn in Mode (Refer to Chapter III-3. Hot Keys for Function Controls)
- Make sure the F/W is the latest version.
5-4.4 DDC
Test Pattern: EDID program
- Make sure it can pass test program.
5-4.5 Fine Tune and Sharpness
Test Signal: 1280x1024@60Hz
Test Pattern: Line Moiré 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.
ViewSonic Corporation
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VE175-3