Kristel 1428-30k series, Руководство по обслуживанию

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Background white balance adjustment:
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set all bias VR’s (204, 205 and 206) to max. and let the raster to be invisible
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display black pattern (all video signals are disable) and adjust SCREEN VR,
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as soon as the raster appears, check out which color (red, green or blue) comes out first
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adjust bias VR of the other 2 colors to get gray raster
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adjust SCREEN (from FBT) to let the gray raster no larger than 1FT - L
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White balance adjustment:
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use color analyzer photometer, display center block patern, set the brightness to mini-
mum than adjust the contrast VR to let brightness to be 35 FL and RGB balanced
per Minolta reading.
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X-RAY protection seeting: VR602
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input 31.5 kHz (640x489) with crosshatch pattern
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connect the positive lead of multimeter to ZD601 (+)
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adjust VR 604 to obtain a 3.5 - 5.4vDC reading
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Purity adjustment:
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is associated with convergence alignment / see procedure - required previous experience/
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display magenta color pattern
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adjust the purity magnet so that the picture is in magenta color. By turning two overlap-
ping pawls in opposite directions, move them until they are at the same angle, 9 o’clock
and 3 o’clock respectively. / as shown in fig.1 /
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for static convergence adj. / as shown in fig.2 and fig.3 / follow the next steps:
a/ display magenta crosshatch pattern
b/ open the two pawls of the 4-pole magnets to allow the red and blue vertical line to unite
c/ open and rotate the two pawls at a constant angle so that the red and blue horizontal lines
can unite
d/ if the vertical line deviates, open the two pawls at the deviation position and make a minor
adjustment by changing its angle.
e/ display cross hatch pattern
f/ make the red and blue vertical lines at the center unite whith the green by opening the two
6-pole pawls.
g/ rotate the two pawls at constant angle so that red and blue horizontal libes can unite with
the green.
f/ if the vertical lines deviate, change the angle of pawls from the deviation pos.
pg.20
1428-30k series