Display Alignment; Times & Display Size; Picture Position; Linearity - Hitachi CM621FET Service Manual

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1. DISPLAY ALIGNMENT

A. TIMING & DISPLAY SIZE
For all presetting mode shall be within the limitation:
H. WIDTH
V. HEIGHT
The external control range of the data area, shall be as follows;
Max. horizontal size
Min. horizontal size
Max. vertical size
Min. vertical size
B. PICTURE POSITION
For all presetting mode shall be within the limitation:
H.PHASE
V.CENTER
The external control ranges of display for all modes listed in section 2.4
H.POSITION
V.CENTER
C. LINEARITY
The CONTRAST and BRIGHTNESS control shall be properly adjusted at 20 F-L with Full-intensity reverse
pattern, then change to crosshatch Pattern 12x10 (H x V), the size of grid of crosshatch pattern in every display
mode shall not vary than 5%(P) or 6%(S).If two line is next to each other, 6%(P) or 7%(S) if they are not next to
each other. The calculation formula was listed below:
H max - H min
H max + H min
300 ± 5mm
225 ± 3 mm
: overscan the screen
: ≤ 285mm
: over the screen
: ≤ 202 mm
SCREEN CENTER ± 3 mm
SCREEN CENTER ± 2 mm
≥ 50 mm
≥ 25 mm
V max - V min
x100%
or
V max + V min
x100%
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