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MODELS: VS-45609 / VS-50609 / VS-55609 / VS-60609 / VS-60719 / VS-70709
[Focus]
5. Electrostatic Focus
Measuring
--------
Instrument
Test Point
RQ Connector
------
Ext. Trigger
Measuring
-------
Range
Input Signal
Monoscope/Crosshatch
Input Terminal
Video Input
CONVERGENCE MODE
(MENU-0-1-5-9)
COLOR
PRESS
RED
1
GREEN
2
BLUE
3
[Focus]
6. Lens Focus
Measuring
--------
Instrument
--------
Test Point
------
Ext. Trigger
Measuring
-------
Range
Input Signal
Monoscope
Video Input
Input Terminal
Purpose:
To set focus to the optimum point.
Symptom:
Blurred picture.
Note: These adjustments must be performed after Sub Contrast Adjustment.
General
1. Reset the AV Functions
2. Red, green or blue rasters can be activated by using the Convergence Mode
(Table 1).
Electrostatic Focus
1. Supply a Monoscope signal to the Video Input. (Do Not use a Crosshatch.)
2. Activate a red raster.
3. Adjust the Red VR-FOCUS for optimum focus.
4. Repeat steps 2 and 3 for green and blue rasters.
Focus Verification
1. Supply a Crosshatch signal to the Video Input.
2. Verify good focus on the Crosshatch
3. If necessary, readjust focus using the Monoscope pattern.
Purpose:
To set the Lens position for optimum focus
Symptom:
Blurred picture.
Note: This adjustment must follow item 6 (Electrostatic Focus). Perform this
adjustment for RED, GREEN, and BLUE monochrome pictures.
1. Supply a VIDEO signal (Monoscope).
2. Cover the Red and Blue Lens (producing a green raster).
3. Adjust the Green Lens for best focus at the center of the Monoscope pattern.
Note: Attach a white paper to the screen center. During adjustment,
observe the picture on the screen from inside for easier adjustment.
4. Repeat Steps 2 and 3 for the Red and Blue monochrome pictures.
5. Supply a crosshatch pattern and confirm the crosshatch lines at all four sides
are the same width.
6. If not, check the Centering and Static Convergence adjustments.
Page 30
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