Sanyo VCC-9615P Service Manual page 4

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2-6. Iris Level Adjustment
Adjustment location: VR244 (CA-1)
Measuring location: VIDEO OUT
Measuring equipment: Oscilloscope, color bar chart
Subject: Gray scale chart
Adjusting method:
1. Display the color bar chart at designated picture angle.
2. Click the "NEXT" to be "Agc Off(AutoIrisLens Adj)" in the
adjustment window.
3. Turn the VR244 to the right so that the white level is maxi-
mum.
4. Turn the VR244 to the left so that the output level is 550 ±
20 mVp-p.
30 µsec
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2-7. AGC Level ADJUSTMENT
Adjustment location: Computer screen
Measuring location: VIDEO OUT
Measuring equipment: Oscilloscope, color bar chart
Subject: Gray scale chart
Adjusting method:
1. Display the color bar chart at designated picture angle.
2. Click the "NEXT" to be "Adj.Agc" in the adjustment window.
30 µsec
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550 ± 20 mVp-p
After finishing AGC level adjustment, start Hue and
chroma adjustment automatically.
2-8. Hue and Chroma Adjustment
Adjustment location: Computer screen
Measuring location: VIDEO OUT
Measuring equipment: Oscilloscope, vectorscope,
Subject: Color bar chart (Display the color bar chart at desig-
nated picture angle.)
1. Adjust "Adj.Chroma" in the adjustment window.
2-9. CCD White Point Defect Detect Adjustment
Measuring location: VIDEO OUT
Measuring equipment: Monitor display
Adjustment method:
1. After finishing Hue and Chroma adjustment, shield light with
a lens cap to provide dark condition.
2. Click the "NEXT" button to be CCD White Point Defect De-
tect Adjustment.
3. After completing this adjustment, it comfirms that white point
can not be seen on the monitor display.
4. "OK" will display in the "STATUS".
5. Click the "CLOSE" in the adjustment window, and complete
the adjustment window.
2-10. 28 MHz VCO Voltage ADJUSTMENT
Adjustment location: CT232 (CA-2)
Measuring location: TP232 (CA-2)
Measuring equipment: Digital voltmeter
Subject: No designation
Adjusting method:
1. Adjust with CT232 to 6.0 ± 0.2 V.
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30 µsec
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color bar chart
30 µsec
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