Sanyo VCC9615P service manual Iris Level Adjustment

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30 sec

VIDEO OUT

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VIDEO OUT

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, color bar chart

Subject: Color bar chart (Display the color bar chart at desig- nated picture angle.)

1. Adjust “Adj.Chroma” in the adjustment window.

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.

550 ± 20 mVp-p

30 sec

VIDEO OUT

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 sec

VIDEO OUT

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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Contents Product Safety Notice Specifications Contents DISASSEMBLY, VR and TP Location and Board Location Adjustment Adjustment ConditionPreparation Table for Servicing ToolsIris Level Adjustment Accessories & Packing Materials Cabinet & Chassis PartsElectrical Parts Compl PWB,CA-1Compl PWB,CA-2 9K JA 1/16WTransformer Compl PWB,CA-3 Flexible Flat CablesOverall WIRING, Block Diagram & Circuit Diagrams Printed Wiring Boards P.W.BProduct Safety Notice Overall Wiring CA-1IC102 Block Diagram CXD3400N Overall Circuit Block Diagram IC101 Block Diagram ICX409AKVout CA-1 Circuit AD9848ACA-2 Circuit Waveforms Test Point Waveform LocationCA-2 Circuit T2521CA-2 Circuit UPPER-LEFT CA-2 Circuit UPPER-RIGHT CN211CN241 IC241CA-2 Circuit LOWER-LEFT CA-2 Circuit LOWER-RIGHT W2003Printed Wiring Boards P.W.B CA-2 Board Side a C2257CA-2 Board Side B TP200Jun./’03