Image Enhancer System Adjustment; Ccd Bias Adjustment; Gain Adjustment; Adjustment - Sony DXC-325P Service Manual

3-6. IMAGE ENHANCER SYSTEM ADJUSTMENT
Note: It is necessary to adjust QRV1, Q@RV4
unless these controls are replaced. Do
no touch these controls.
3-6-1. CCD BIAS Adjustment
Object: Grayscale chart
Equipment: Waveform monitor
Preparation: Set the BARS WB switch on the
side of the camera to 3200°K.
Test point: TP1/IE-23 board
Adjustment:
1. Adjust the zoom control so that the gray-
scale chart frame touches the underscanned
picture frame on the monitor.
Monitor Screen
2. Adjust Q@RV1/IE-23 board to maximize the
waveform amplitude. At that time, the top
and bottom of waveform should be not limit-
ed at peaks.
3-6-2. 1H GAIN Adjustment
Object: Grayscale chart
Equipment: Waveform monitor
Preparation: Set the BARS WB switch on the
side of the camera to 3200°K.
Adjustment point: @RV2/IE-23 board
Adjustment:
1. Adjust the zoom control so that the gray-
scale chart frame touches the underscanned
picture frame on the monitor.
Monitor Screen
2. Adjust Q@RV2/IE-23 board so that video out
level does not change when charging over
the Sl (DTL)/IE-23 board to ON or OFF.
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DXC-325P (EK) 3-21
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1E-23 BOARD (COMPONENT SIDE)
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RaTio B LEV BIAS
1E-23 BOARD (PANEL SIDE)
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3. ALIGN