Aiwa VX-F21DV1, Руководство по обслуживанию

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White Balance Adjustment
Note: Allow 20 minutes or longer of warm-up time before starting the white balance adjustment. Repeat the entire steps of the white
balance adjustment several times until all three channels of red, green and blue are balanced each other.
Input signal: White raster
Measuring equipment: Pattern generator
Adjustment point:
Adjustment menu PAGE 2-1 to PAGE 2-5
Adjustment method:
1.
Connect the white raster signal from the pattern generator to the input.
2. Find out which color is most strongly illuminating among the three colors of red, green and blue. Set the cut-off value of the
color that you have selected as the most strongly illuminating color, to 127 as the fixed value. Adjust the cut-off values of the
remaining two colors until the optimum white balance is obtained on screen using the VOLUME UP/DOWN keys of the jig
remote controller.
3. Select the adjustment menu 2-4 G. DRIVE and increase the G DRIVE value to 200 or higher using the VOLUME UP/DOWN
keys of the jig remote controller. The screen will get greenish.
4. Then start decreasing the G DRIVE value using the jig remote controller until the green color looks as if it is lost.
5. Select the adjustment menu 2-5 B. DRIVE and increase the B DRIVE value to 200 or higher using the VOLUME UP/DOWN
keys of the jig remote controller. The screen will get bluish.
6. Then start decreasing the G DRIVE value using the jig remote controller until the blue color looks as if it is lost.
7. Repeat the above steps 1 to 6 several times until white balance is obtained.
SUB BRIGHTNESS Adjustment
Input signal: Color bars (stair step)
Measuring equipment: Pattern generator
Adjustment point:
Adjustment menu PAGE 3-2
Adjustment method: Adjust SUB BRIGHTNESS so that the second scale (second step) from the right of the stair step signal just
starts illuminating using the VOLUME UP/DOWN keys of the jig remote controller.
SUB CONTRAST Adjustment
Input signal: Color bars (Q/W, white/100%, chroma/OFF)
Measuring equipment: Oscilloscope, pattern generator
Test point:
SO901 R (R cathode)
Adjustment point: Adjustment menu PAGE 3-1
Adjustment method: Connect an oscilloscope to SO901 R (R cathode). Adjust the SUB CONTRAST so that the 100% white
voltage from the pedestal is 90±2 V using the jig remote controller VOLUME UP/DOWN keys.