Iiyama Vision Master 405, Руководство по обслуживанию

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L M R
Fig.1
T Thin
M Thick
B Thin
Fig.2
Thin Thick
Fig.3
Thick
L M R
1-19. FOCUS [PWB-MAIN]
1)
2)
3)
4)
5)
6)
7)
8)
9)
10)
Receive a green cross-hatch signal of MODE 5.
Adjust FOCUS-A VR of T504 (FBT) to make the vertical lines sharpest at
points L, M and R as shown in Fig 1.
Adjust FOCUS-B VR of the T504 to make the horizontal center line
sharpest at points L, M and R as shown in Fig. 1.
If the focus at points T and M is as shown in Fig. 2, adjust V DBF in the
menu with the front buttons to make the horizontal lines have the same
thickness at points T, M and B. And adjust the FOCUS-B VR again to
make the horizontal lines sharpest at points T, M and B. (V DBF should
not be adjusted when focus at points T and M is optimum.)
If the focus at points L and M is as shown in Fig. 3 or vice versa, adjust
DBF Para and DBF Phase in the menu with the front buttons to make the
horizontal center line have the same thickness at points L, M and R. And
adjust the FOCUS-B VR again to make the horizontal center line sharpest
at points L, M and R. (DBF Para and DBF Phase should not be adjusted
when focus at points L and M is optimum.)
Repeat 2) to 6) until the focus is optimum.
Confirm no focus variation on the entire screen.
Check the focus with red and blue respectively.
Receive a H-character signal and repeat 7).
Repeat the FOCUS adjustments until the focus with red, green and blue
is optimum.
1-18. RASTER REGULATION (DYNAMIC) confirmation
1)
2)
3)
4)
5)
Receive an entire white signal of MODE 6.
Set the input signal by the signal generator as follows:
V-DISPLAY-TIME: 150 V-POSI-TIME: 450
Maximize the brightness.
Confirm that
,
W of the right hand side figure is 1.0mm or less when
turning the luminance volume on the signal generator to the maximum
and “1” respectively.
Return the brightness to center indication (adjustment data: 128).
n
n
FOCUS-A
FOCUS-B
SCREEN
T501(FBT)
Back-raster
Picture
W