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ViewSonic Corporation
Make sure it can pass test program.
Fine Tune and Sharpness
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 the
image to eliminate visual wavy noise.
(b)Then, select and enter “Sharpness” function to adjust the clarity and focus of
the screen image.
Boundary
Test Signal: 1280*1024@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.
White Balance
Test Signal: 640*480@60Hz
Test Pattern: White and Black Pattern
1.5.8 R, G, B, Colors Contrast
Test Signal: 1280*1024@60Hz
Test Pattern: R, G, B, Color Intensities Pattern and 16 Gray Scale Pattern
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Check and see if each color is normal and distinguishable.
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If not, please return the unit to repair area.
Screen Uniformity and Flicker
Test Signal: 1280*1024@60Hz
Test Pattern: Full White Pattern
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Check and see if it is in normal condition.
1.5.10 Dead Pixel and Line
Test Signal: 1280*1024@60Hz
Test Pattern: Dark and White Screen Pattern
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Check and see if there are dead pixels on LCD panel with shadow gauge and
filter film.
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The total numbers and distance of dead pixels should be compliant with the
spec.
Mura
Test Pattern: White, RGB, Black, & Grey
Test Tool: 10% ND Filter
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Check if the Mura can pass 10% ND Filter.
Audio
Test Signal: Voice signal (optional, depend on model)
Test Pattern: liberty
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Make sure there is audio output.
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Make sure that audio function (volume 80%) is working without noise and
Summary of Contents for VA712b-2
Page 11: ...11 ViewSonic Corporation 3 Front Panel Function Controls And Indicators...
Page 18: ...18 ViewSonic Corporation 4 2 POWER BLOCK FUNCTION DESCRIPTION Inverter Block Function...
Page 19: ...19 ViewSonic Corporation Power Block Function...
Page 26: ...26 ViewSonic Corporation...
Page 42: ...42 ViewSonic Corporation 3 3 DDC Key In Procedure Sep1 Select and execute DDC Key In program...
Page 43: ...43 ViewSonic Corporation Sep2 Inpute the S N and execute Enter...
Page 44: ...44 ViewSonic Corporation...
Page 45: ...45 ViewSonic Corporation Sep3 Key the Enter and write the data...
Page 46: ...46 ViewSonic Corporation Sep4 If ddc program OK and show data compare ok...
Page 47: ...47 ViewSonic Corporation 6 Trouble Shooting Flow Chart...
Page 66: ...66 ViewSonic Corporation 8 Exploded Diagram And Spare Parts List...
Page 67: ...67 ViewSonic Corporation...
Page 68: ...68 ViewSonic Corporation 5 7 Packing For Shipping...
Page 72: ...72 ViewSonic Corporation Picture 7 Picture 8 Picture 9 Picture 10 Picture 11 Picture 12...
Page 73: ...73 ViewSonic Corporation Picture 13 Picture 14 Picture 15...
Page 74: ...74 ViewSonic Corporation Picture 16 Picture 17 Picture 18 Picture 19 Picture 20...
Page 75: ...75 ViewSonic Corporation 10 Block Diagram...
Page 84: ...84 ViewSonic Corporation 12 PCB Layout Diagram 12 1 MAIN BOARD PCB TOP VIEW...
Page 85: ...85 ViewSonic Corporation...
Page 86: ...86 ViewSonic Corporation 12 2 MAIN BOARD PCB BUTTON VIEW...
Page 87: ...87 ViewSonic Corporation 12 3 KEYBOARD TOP VIEW 12 4 KEYBOARD BUTTON VIEW...
Page 88: ...88 ViewSonic Corporation 12 5 POWER PCB TOP VIEW...
Page 89: ...89 ViewSonic Corporation 12 6 POWER PCB BUTTON VIEW...
Page 90: ...90 ViewSonic Corporation 12 6 AUDIO PCB TOP VIEW BUTTON VIEW...