Raster Distortion Check - Hitachi 53SWX10B Service Manual

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
---Measure the winding of the outside line.
I ~ L
C
I
Item
Top/Bottom pincushion distortion
Right/Left pincushion distortion
Center line Vertical line
tilt Horizontal line
Center line Vertical line
winding Horizontal line
Trapezoidal distortion Vertical line
Skew distortion Horizontal line
A
B
G
Symbol 43"
±5
A,B
±4
C,D
5 5
5 5
±3 ±3
±3 ±3
4 4
5 5
D
J
55 55 55
(unit: mm)
53" 61"
±6 ±6
±4 ±5
6 6
6 6
±3 ±4
±3 ±4
5 5
6 6
E
H
F
K
L