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ViewSonic Corporation
Е771-4
5-2 Alignment Procedures
S-2-1 High Voltage Adjustment
CONDITION
Display image : Crosshatch pattern
PROCEDURE
Connect DC meter to TPS and adjust VR401 to obtain a DC voltage of -133 + ІУ DC
5-2-2 Screen and White Balance Adjustment
CONDITION
Press [1] and [2] buttons simultaneously when switching the power "Оп".
Bias VRs: VR961, VR901, VR931
Display image : No video
PROCEDURE
1
Raster color setting
1-а.
Setbrightness through OSD menu to -40 V at G1 and 560 V at G2.
l-b
Adjust VR961, VR901 and VR931 to maximum.
1-с
Adjust VR931
to raster just distinguish.
1-4
Setbrightness to maximun.
1-е
Adjust VR901 to get x=280 + 5 and VR961 to get y=280 + 5, brightness = 0.9 ~ 1.2 FL.
1-f
Adjustbrightnessto cut-off.
CONDITION
Display image : 50 mm x 50 mm white block pattern
PROCEDURE
2
6500°K color temperature setting
2-а.
Set brightness to cutoff and contrast to maximum.
2-b
Move cursor on OSD to choose color temperature icon.
2-c.
Press (2 key to G gain then adjust С gain = 68 value, then adjust В, R to y=329+5, х=313+5.
2-4
Checkx-313z5, y=329+5.
3
9300°K color temperature setting
3-a.
Setbrightnessto cutoff and contrastto maximum.
3-b
Move cursor on OSD to choose color temperature icon.
3-с.
Press [5] key to С gain then adjust С gain = 85 value, then adjust B, В to у=297-5, х=283+5.
3-4
Adjust contrast to set y=42+2FL
3-e
Check x=283+5, y=29745.
4
Full white ABL setting
CONDITION
Display image : full white pattern
4-а
Set brightness to cutoff and contrast to maximum.
Confidential - Do Not Copy
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