Chroma Gain Adjustment - Hitachi VK-S214R Service Manual

Color video camera

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Specifications (2 pages)

Table Of Contents

Table of Contents

Adjustment > Adjustment (Camera Adjustment)

6-5-3 Chroma gain adjustment (Figs. 6-5-1, 6-5-2, 6-5-3)

Incompleted Phenomenon

1) Color of the picture is denser than that of the subject.

2) Color of the picture is lighter than that of the subject.

Test Point

Video Out (PG1601-6)

Equipment/Jig

1) Vectorscope or Oscilloscope

2) C12 light balance filter

Condition

1) Attach a C12 light balance filter to lens.

2) Point at a color bar chart.

Procedure

1) Input 3 to PC on the adjustment menu screen.

2) The chroma gain adjustment screen will appear.

3) When using a vectorscope (Figs. 6-5-1, 6-5-2):

Press the D or U key to set the red vector to approx. 240%

of burst vector. Then, while holding down the Ctrl key,

press the D or U key to set the red vector to approx. 240%

± 5% of burst vector.

When using an oscilloscope (Fig. 6-5-3):

Press the D or U key to set the red level on waveform to

approx. 686 mVp-p.

Then, while holding down the Ctrl key, press the D or U

key to set the red level on waveform to approx. 686 mV ±

20 mVp-p.

4) Press the Enter key: The PC display will switch from the

chroma gain data write screen to chroma gain

adjustment complete screen.

5) Press any key to restore the adjustment menu screen.

RED

BURST

100%

Fig. 6-5-1 Chroma Gain

(For VK-S214R)

RED

BURST

240%

± 5%

100%

Fig. 6-5-2 Chroma Gain

(For VK-S214ER)

6 - 10

Adjustment menu

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ADJUSTMENT

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[1]

AUTO IRIS CONTROL

[2]

WHITE BALANCE

[3]

CHROMA GAIN

[ESC] RETURN TO MAIN MENU

Please select [1] - [3] or [ESC]

Input 3.