NEC MultiSync FE001SB, Service Manual

Page: 88 / 178

5-22
5.5 Geometric Distortion
5.5.1 Partial Distortion
The number of pole point each side
All Preset Signals
Top and Bottom side: Less than 3 point
Left and right side: Less than 2point
5.5.2 Inner Distortion
All Preset Signals With Crosshatch
f
h
≥
38kHz: x
≤
0.5 mm
f
h
< 38kHz: x
≤
1.0 mm
5.5.3 Raster Rotation/Tilt
All Preset Signals
|
a - b
| ≤
1.0 mm
or -0.5 degree
≤ θ ≤ ±
0.5 degree
a
b
Bezel
θ
5.5.4 Pincushion
All Preset Signals
Top
: d1
≤
1.5 mm
Bottom : b1
≤
1.5 mm
|d1-b1|
≤
1.5 mm
Left side : a1
≤
1.5 mm
Right side : c1
≤
1.5 mm
|a1-c1|
≤
1.5 mm
a1
b1
c1
d1
5.5.5 Barrel
All Preset Signals
Top
: d2
≤
1.5mm
Bottom : b2
≤
1.5 mm
Left side : a2
≤
1.5 mm
Right side : c2
≤
1.5 mm
a2
b2
c2
d2
5.5.6 Trapezoid
∆
y
≤
1.5 mm
∆
x
≤
1.5 mm
∆
x = | x1 - x2 |
∆
y = | y1 - y2 |
Pole point
X
Bezel
y1
y2
x1
x2
x2
’
x1’
y1
’
y2’