Focus Setting - Neotec NT-3500 Service Manual

5.8.2 Set contrast R613 to maximum and adjust Brightness VR (R602) until the
background raster is barely visible.
5.8.3 Adjust R938, R937, R936 to obtain a full white pattern, and check to make sure the
brightness is within a range of 5 + -5 Fl.
5.9 WHETE BALANCE CHECKING
5.9.1 Adjust the Brightness VR (R602) until the background raster is just visible.
5.9.2 Adjust the Contrast VR (R613) to obtain a full white pattern of 20 + -0.5F1 and
check the screen center color temperature within range of x: 289 + - 0.025,
y: 305 + - 0.025, if not then repeat 5.8.
5.10 FOCUS SETTING
5.10.1 Adjust the Brightness VR (R602) until the background raster is just visible.
Adjust the Contrast VR (R6 13) to full white pattern of 20+!- 1.0 Fl.
5.10.2 Change the compatible Signal Generator video signal to a 350 line full white
crosshatch pattern video signal. (NT-3 602 480 LINE)
5.10.3 Adjust the Focus VR to get an optimized focus for the total screen.
5.11 MISCONVERGENCESETflNG
5.11.1 Change the compatible Signal Generator video signal to a 350 line crosshatch
pattern. (NT.3602 480 LINE)
5.11.2 Open the knobs of the two 4-pole magnets, and make the blue and red vertical lines
match with each other at the center of the picture.
5.11.3 Turn the magnet while keeping the 4-pole magnets open and make the blue and red
lateral lines match with each other.
5.11.4 Open the knobs of the two 6-pole magnets, and make the green vertical line match
with the blue and red vertical lines at center of the picture.
5.11.5 Turn the 6-pole magnets while keeping their knobs open until the green. lateral line
matches with the blue and red lateral lines at the center of the picture.
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