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Sanyo VCB-3455P Service Manual page 4

B/w ccd camera

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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
(H + h)
2
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. Set DIP SW2 ON position.
2. Adjust with VL101 so that the voltage is 2.1 ± 0.1 V.
3-3. AGC LEVEL ADJUSTMENT
Adjustment location: VR102
Measuring location: VIDEO OUT
Measuring equipment: Waveform Monitor
Subject: Gray scale chart (γ =0.45)
Adjusting method:
1. Set IRIS switch (S101) to EI position.
2. Display the gray scale chart on full screen.
3. Open iris of lens to MAX.
4. Adjust with VR102 so that the video level is 112 ± 7 IRE
during video output.
CCD camera
L
CS mount surface
− 4 −

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