Convergence Check - Hitachi 36SDX88B Service Manual

3.6 Convergence Check
Preparation for adjustment Adjustment procedure
(1) Input LINEARITY TEST
(1) Measure mis-convergence value
PATTERN (9 x 11 lines) between red and green, blue and
signal.
green and red and blue.
(2) Touch up with ferrite sheet in case
red vertical and horizontal lines,
especially in Zone C, are remarkably
visible, even if set meet the following
specifications.
Criteria
Area A B
c
Mis-convergence Within 1 .Omm Within ? .5mm
Within 2.5mm
specification
(0.0394 inches) (0.0591 inches) (0.0787 inches)
4
H
w
(Height of front frame)
Area A, B and C on the screen
Area A: Inside circle with radius of l/2 V (height of front frame)
Area B: Inside circle with radius of l/2 H (width of front frame), outside Area A
Area C: Outside Area B
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