Adjustment - Sanyo VCB-3385P Service Manual

3. ADJUSTMENT

3-1. ADJUSTMENT PREPARATION
1. Use the 3,200K viewer for the subject.
2. Set the ITE gray scale chart II (γ =0.45) to the viewer.
3. Set the angle of adjustment control (VR) before starting
adjustment at the center or temporary adjustment (nearly
adjusted) unless specified.
3,200 K viewer
H
2
(H + h)
X f − 12.5 mm
L =
H X h
L: Distance from CS mount to pattern (mm)
H: Pattern height (mm)
f : Lens focal length (standard 12.5 mm)
h: Height (4.8 mm) of CCD imaging surface
Note : The video monitor should be an under-scan TV.
3-2. PCO VOLTAGE ADJUSTMENT
Adjustment location: VL101
Measuring location: T102 (PCO)
Measuring equipment: Multimeter
Subject: No designation, L-L mode
Adjusting method:
1. Adjust with VL101 so that the voltage is 2.1 ± 0.1 V.
3-3. AGC LEVEL ADJUSTMENT (BLC OFF)
Adjustment location: VR102
Measuring location: VIDEO OUT
Measuring equipment: Waveform Monitor (Oscilloscope)
Subject: Gray scale chart (γ =0.45)
Adjusting method:
1. Display the gray scale chart on full screen.
2. Open iris of lens to MAX.
3. Adjust with VR102 so that the video level is 105 ± 5 IRE
(750 ± 50 mV) during video output.
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CCD camera
L
CS mount surface
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