B. Instrument alignment.
1.
Defection
presets.
Control pots VR101, VR401, VR403 Focus VR are set at middle point, screen VR set to MIN.
2.
Power
adjustment.
2.1
Input crosshatch pattern at 31K 640×480, beam current set at 0µA.
2.2
Adjust VR101 until DC = 75V
̈́
0.3V at TP201.
2.3
Adjust VR403 until voltage at TP208 = 63V
̈́
0.3V for LG CRT.
63.5V
̈́
0.3V for SDI CRT.
3.
Size
&
Geometry
Adjustment.
3.1
Raster
Centering.
3.1.1 Input cross hatch pattern at 60K 1024*768 Hz mode.
3.1.2 Adjust contrast to 10FL, adjust screen just raster visible.
3.1.3 Adjust VR401 to center raster on screen such that the horizontal distance from the midpoint of the left
display edge to the left bezel edge is within 2mm of the distance from the midpoint of the right display
edge to the right bezel edge.
3.2
Picture
size.
Input mode 1 ~ 12 signal adjust V-size, H-size to achieve.
H-size
Κ
310mm
̈́
2mm.
V-size
Κ
230mm
̈́
2mm.
3.3
Picture
position.
Input mode 1~12 adjust V-position, H-position such
that the picture is centered with the screen.
3.4
Geometry
adjustment.
3.4.1
Input
mode
1~12.
3.4.2 Pincushion and barrel distortion.
3.4.3 Trapezoid and parallelogram distortion trapezoid
/
parallelogram
Љ
1.5mm.
3.4.4
Rotate
adjustment.
h ¡Ø 1mm
310mm
230mm
Rotation
A
B
Bezel
Raster
A-B
Raster center
2mm
Bezel
Picture
D
A
B
C
¡ýA - B¡ý¡Ø 2mm
¡ýC - D¡ý¡Ø 2mm
Picture position
Bezel
Picture
310mm
230mm
Picture size
A
A'
B
B'
C
C'
D
D'
Pinchshion
ู
1mm (A’,B’,C’,D’)
Barrel
ู
1mm (A,B,C,D)
Pincushion / Barrel distortion
29
ViewSonic Corporation
Co
nfidential - Do Not Copy
70f+SB-3
E
Summary of Contents for E70F - 17" CRT Display
Page 36: ...33 ViewSonic Corporation Confidential Do Not Copy 70f SB 3 E...
Page 37: ...34 ViewSonic Corporation Confidential Do Not Copy 70f SB 3 E...
Page 38: ...35 ViewSonic Corporation Confidential Do Not Copy 70f SB 3 E...
Page 57: ...54 ViewSonic Corporation Confidential Do Not Copy 70f SB 3 E...
Page 58: ...55 ViewSonic Corporation Confidential Do Not Copy 70f SB 3 E...
Page 59: ...56 ViewSonic Corporation Confidential Do Not Copy 70f SB 3 E...
Page 60: ...57 ViewSonic Corporation Confidential Do Not Copy 70f SB 3 E...
Page 61: ...58 ViewSonic Corporation Confidential Do Not Copy 70f SB 3 E...
Page 62: ...59 ViewSonic Corporation Confidential Do Not Copy 70f SB 3 E...
Page 65: ...Model No E70f SB 3 62 ViewSonic Corporation Confidential Do Not Copy 70f SB 3 E...
Page 66: ...Model No E70f SB 3 63 ViewSonic Corporation Confidential Do Not Copy 70f SB 3 E...
Page 67: ...Model No E70f SB 3 64 ViewSonic Corporation Confidential Do Not Copy 70f SB 3 E...
Page 68: ...Model No E70f SB 3 65 ViewSonic Corporation Confidential Do Not Copy 70f SB 3 E...
Page 77: ...11 PCB Layout Diagrams 74 ViewSonic Corporation Confidential Do Not Copy E70f SB 3...