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Adjustment Procedures
5–16
AM700 Audio Measurement Set Service Manual
4. Insert the Monitor adjustment disk to in the PC, and run the program to
display cross hatch pattern.
5. Make the display monitor size and linearity adjustments.
a. Adjust L4 (HORIZ WIDTH) so that the width of the test pattern is as
wide as the test graticule.
b. Adjust R43 (V SIZE) so that the height of the test pattern is as tall as the
test graticule.
c. Adjust R57 (V CENTER) to center the test pattern vertically in the test
graticule.
d. Adjust R15 (H PHASE) to center the test pattern horizontally in the test
graticule.
e. Adjust R48 (V LIN), if needed, so that the squares of the test pattern are
all the same size and that the circle is round not squashed.
NOTE. Magnets are added to yoke assembly at the factory to square up the
corners of the display. The magnets are secured with RTV silicone adhesive and
should not require replacement or relocation under normal operation. In the
event that a new CRT is installed, some adjustment to the magnets may be
required for the best adjustment of the corners.
f. Interaction between these adjustments requires a recheck of part a
through part e for best size and linearity.
g. Remove the test graticule.
6. Adjust black and white levels
a. Adjust R64 (BLACK), if needed, until the retrace lines just disappear
(second box on upper left just turns invisible).
b. Display the full-white test pattern.
c. Adjust R4 (WHITE), if needed, for 95 to 105 fl at 70% brightness with
the touch screen removed.
d. Check for approximately 190 to 260 fl at 100% brightness.
7. Adjust focus
a. Display the full screen of the “small e” test pattern.
b. Adjust R36 (FOCUS) if needed, for the best focus possible in the center
of the screen.