JVC TM-H1700G/E Service Manual page 34

TM-H1700G
Item Test equipment
Under scan Signal generator
Horizontal (Circle pattern)
Size
Horizontal
center
Adjustment
Only for PAL
signal
adjustment
6 ～ 9mm
Under scan Signal generator
(Crosshatch pattern)
Horizontal
Size
Horizontal
center
Adjustment
Signal generator
16:9
Under scan
(Crosshatch pattern)
Side
pincushion
Adjustment
34
Adjustment
Test points
locations
DD01 (H. CENTER)
DD02 (H. SIZE)
[SERVICE MENU]
PICTURE
SIZE
Effective
screen size
6 ～ 9mm
DD07
(E-W PARABOLA)
DD08
(E-W CORNER)
[SERVICE MENU]
DF07
(E-W PARABOLA)
DF08
(E-W CORNER)
[SERVICE MENU]
No. 51922
Adjustment procedure
22. Input the PAL circle pattern signal.
23. Select the under scan mode.
24. Select the DD01 and adjust it to the left and right
blanking width become equal.
25. Select the DD02 and adjust it to the left and right
blanking width become the value given below.
Horizontal
Blanking Width
(one side of screen)
26. Confirm the side pincushion of the four corners in
the screen.
27. If not optimum, adjust the DD07 and DD08 to
become correctly.
28. If the warps are happened by adjust the side
pincushion, readjust the above-mentioned DD01
and DD02.
29. Switch the aspect ratio to the 16:9 mode.
30. Confirm the side pincushion of the four corners in
the screen.
31. If not optimum, adjust the DF07 and DF08 to
become correctly.
32. If the warps are happened by adjust the side
pincushion, readjust the above-mentioned DD01
and DD02.
33. Turn the scan size to the normal.
6～ ～ ～ ～ 9mm