JVC DT-V2000SU Service Manual page 47

DT-V2000SU
NTSC 4 : 3 UNDER SCAN H.SHIFT H.SIZE
•
Test equipment
Signal generator(Cross-hatch pattern)
.............
Test points
Adjustment locations DQ03(H SHIFT), DQ01 (H SIZE)
1. Set the scan size to the UNDER, and set the ASPECT to 4 : 3 in the MENU
385mm
screen.
~
Escutcheon
2. Input the cross-hatch pattern signal of the NTSC to the INPUT B terminal.
-
-------------------
-,~
3. Set the BRIGHT and CONTRAST VR on the front panel to the click position.
4. Adjust the DQ03 to the horizontal center of the input signal agree with the
CRT screen center.
5. Adjust the horizontal screen size to 385mm with the DQ01.
----------------------
•
NTSC 4 : 3 UNDER SCAN V.CENTER, V.SHIFT
Test equipment
Signal generator(Cross-hatch pattern)
Test points
,.
Adjustment locations DQ04(V SHIFT), DQ02(V SIZE)
1. Set the scan size to the UNDER, and set the ASPECT to 4 : 3 in the
MENU screen.
-----------------------,
I
•
2 . Input the cross-hatch pattern signal of the NTSC to the INPUT B
I
I
terminal.
: Escutcheon
3. Set the BRIGHT and CONTRAST VR on the front panel to the click
~
position.
I
280mm
I
4. Adjust the DQ04 to the vertical center of the input signal agree with the
I
I
CRT screen center.
I
I
5. Adjust the vertical screen size to 280mm with the DQ02.
I
,.,
I
I
I
-----------------------
•
NTSC 4 : 3 UNDER SCAN SIDE PINCUSHION, TRAPEZOID, PARALLELOGRAM
Test equipment Signal generator(Cross-hatch pattern)
........
Test points
..........................
Adjustment locations DQ0S(SIDE PIN)
1. Set the scan size to the UNDER, and set the ASPECT to 4 : 3 in the
MENU screen.
2. Input the cross-hatch signal of the NTSC to the INPUT B terminal.
ft
I
II
3. If the vertical lines are distorted in the side pincushion condition, adjust
I
I
the DQ05 to 2nd vertical lines from the screen edges become straight.
I
I
I
I
I
I
I
I
I I
•
L
to straight
_J
No.515198 31