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.,-
f
Cause
Phenomenon
Adjustment
Picture length
too
much extended.
Vertical blanking period is less than standard timing.
[m]
$, .,
.. ,,
.:
..
Adjust verticil sizecontrol
@) .
, :.
. . .. .
Picture deviates
upward.
Vertical front porch is less than standard timing.
m
,,. ,..
:J:
,'
J
-.,.-,
..
Adjust vertical centering control
@.
Picture deviates
downward.
Vertical front porch is greater than standard timing.
[=1
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"~ ;~::;,~ ;~:33},
f$~,1 ~,z,,
.- .,,~, .,
Adjust vertical centering control
@
.
..,.
Note:
Adjustment
range has its design limit which may not cover the timing you would
-1
/a
like to see on the display.
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