Geometric Distortion - Mitsubishi DPLUS 74SB -BKA Service Manual

5.5 Geometric Distortion

5.5.1 Raster Rotation/Tilt
Signal No. 3, 7, 10, 13
| a - b | ≤ 1.8 mm
or -0.5 degree ≤ θ ≤ ± 0.5 degree
5.5.2 Pincushion
Signal No. 3, 7, 10, 13
: d1 ≤ 1.5 mm
Top
: b1 ≤ 1.5 mm
Bottom
: a1 ≤ 1.5 mm
Left side
Right side : c1 ≤ 1.5 mm
5.5.3 Barrel
Signal No. 3, 7, 10, 13
: d2 ≤ 1.1mm
Top
: b2 ≤ 1.1 mm
Bottom
: a2 ≤ 1.5 mm
Left side
Right side : c2 ≤ 1.5 mm
5.5.4 Trapezoid
Signal No. 3, 7, 10, 13
(a) Horizontal
AD BC −
× ≤
100 0.8% or AD - BC
+
AD BC
(b) Vertical
AB DC −
× ≤
100 0.5% or AB - DC
+
AB DC
5.5.5 . Parallelogram
Signal No. 3, 7, 10, 13
-1.6mm ≤ a ≤ +1.6mm
or -0.5 degree ≤ α ≤ +0.5 degree
5.5.6 Overall Distortion
Signal No. 3, 7, 10, 13
Top : |a
max
Bottom : |b
max
Left side : |c
max
Right side : |d
max
Signal No.2,4,5,6,8,9,11,12
Top : |a
max
Bottom : |b
max
Left side : |c
max
Right side : |d
max
≤
3.7mm
≤
3.1mm
– a | < 2.0mm
min
–b | < 2.0mm
min
– c | < 2.0mm
min
– d | < 2.0mm
min
– a | < 3.0mm
min
–b | < 3.0mm
min
– c | < 3.0mm
min
– d | < 3.0mm
min
a
θ
Bezel
d1
a1
b1
d2
a2
b2
AB
AD
DC
α
Edge of Bezel
c
5-20
b
c1
c2
BC
a
a
Video
b
d