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ViewSonic Corporation
Confidential - Do Not Copy
38
(4). When the picture show “Verify OK”, ISP finished.
5.7.3 After repair, to ensure the quality you should do the following test and
adjustment
Item Content Equipment
Test OSD function
1.Signal is set as 1280x1024@60Hz
2. LCM button are from left to right, checking whether each single
function key and compound function key can be worked.
Chroma
Signal Generator
Contrast Check
1. Set input mode to 1280x1024@60Hz
2. Set Pattern to 32 gray shades
3. Set contrast to the max. The brightest 6~8 shades brightness cannot
be distinguished.
Chroma
Signal Generator
Color Temperature
1. Do “Auto color” at 640 x 480@60Hz, 5-Mosic pattern
2. Measure color temperature, check it complies with the following
temperature:
5400K x=0.335 +/- 0.02, y=0.350 +/- 0.02
6500K x=0.313 +/- 0.02, y=0.329 +/- 0.02
9300K x=0.283 +/- 0.02, y=0.298 +/- 0.02
Chroma Signal
Generator and color
analyzer
Modes switching
check
1. Use Chroma Pattern Generator to make sequence.
VESA (640x480 800x600 1024x768 1280x1024), MAC 832x624
DOS (640x350 720x400), the detail supported modes and power
saving signal.
2. Confirm the above timing modes must be full screen and the
picture must be normal.
3. LED is Orange at power saving mode.
Chroma Signal
Generator
V
X
193
5
wm-
3
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