Hitachi 53SWX10B, Service Manual

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2.19 Raster distortion check
Checking condition
(1) Digital convergence adjustment should have been completed.
(2) Receive the cross-hatch signal (internal signal of the the set is acceptable).
(3) Brightness/Contrast --- standard condition
Contrast : max
Other controls : center position
(4) Check the raster distortion specification: Value shown in the table below or less.
A ~ D
I ~ L
---Measure the winding of the outside line.
Item Symbol 43” 53” 61”
Top/Bottom pincushion distortion A,B
±
5
±
6
±
6
Right/Left pincushion distortion C,D
±
4
±
4
±
5
Center line Vertical line 5 5 6 6
tilt Horizontal line 5 5 6 6
Center line Vertical line
±
3
±
3
±
3
±
4
winding Horizontal line
±
3
±
3
±
3
±
4
Trapezoidal distortion Vertical line 4 4 5 5
Skew distortion Horizontal line 5 5 6 6
(unit: mm)
G
I
J
D
C
A
B
F
E
K
H
L