Hitachi 53SDX20BB - Raster Distortion Check (Normal and 1080 I Throught Mode)

39
(2) Receive 1080i circle pattern of LT-449 (Leader).
5 scales
9~10 scales
5 scales
5
15
26
10
20
30
5
15
26
10
20
30
15
26
10
20
30
15
26
10
20
30
15
10
20
25
30
35
40
15
10
20
25
30
35
40
9~10 scales
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 53” 43”
Top/Bottom pincushion distortion A,B ±6 ±5
Right/Left pincushion distortion C,D ±4 ±4
Center line Vertical line 5 6 5
tilt Horizontal line 5 6 5
Center line Vertical line ±3 ±3 ±3
winding Horizontal line ±3 ±3 ±3
Trapezoidal distortion Vertical line 4 5 4
Skew distortion Horizontal line 5 6 5
(unit: mm)
G
I
J
D
C
A
B
F
E
K
H
L