Adjustment procedure, Focus adjustment =============

20X

107T5

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Electrical Instructions

5.2External degaussing Remove ferromagnetic measuring equipment, Iron tablet, etc., in the neighbourhood of the apparatus within half a meter. Position the set in E-W direction and degauss well via external degaussing coil. Slowly increase the distance between the picture tube and Degaussing coil, keeping the coil in parallel with the Screen of CRT. When the distance is more than 2m, turn of f The degaussing current.

5.3Adjustment mode: 68.7KHz/85Hz with correctly adjusted video size 306x230mm. Use color-analyzer

(Minolta CA-100) to adjust cut-off and white balance. Before alignment, set initial data as item 5.1 and brightness set to 50%.

White alignment measurement equipment set-ups: Setup A: 100x100mm white block , 0.7Vpp input video

signal, contrast at 0%, 9300 mode Calibrate CA100, Low 9300 RGB=100 x=0.283, y=0.297, Y=0.10FL 0.05FL

Setup B: 100x100mm white block , 0.7Vpp input video signal, contrast at 100%, 9300 mode Calibrate Ca100, High 9300 RGB=100 x=0.283, y=0.297, Y=41FL 1FL

Setup C: 100x100mm white block , 0.7Vpp input video

signal, contrast at 0%, 6500 mode Calibrate CA100, Low 6500 RGB=100 x=0.313, y=0.329, Y=0.10FL 0.05FL

Setup D: 100x100cm white block , 0.7Vpp input video signal, contrast at 100%, 6500 mode Calibrate CA100, High 6500 RGB=100 x=0.313, y=0.329, Y=36FL 1FL

Setup E: 100x100mm white block , 0.7Vpp input video signal, contrast at 0%, sRGB mode Calibrate CA100, Low sRGB RGB=100 x=0.313, y=0.329, Y=0.10FL 0.05FL

Setup F: 100x100cm white block , 0.7Vpp input video signal, contrast at 100%, sRGB mode Calibrate CA100, High sRGB RGB=100 x=0.313, y=0.329, Y=36FL 1FL

Setup G: Full white (306x230mm), 0.7Vpp input video signal, contrast at 100% , 9300 mode Calibrate CA100, High 9300 RGB=100 x=0.313, y=0.329, Y=30FL 1FL

Adjustment procedure:

5.3.1Setup A, manually rotate Vg2 pot-meter on LOT until brightness reaches 100 scale.

5.3.2Setup A, adjust RGB cut-off (I2C) for all colors at 100 7 scale, 9300 mode. (x=0.283, y=0.297, Y=0.10 0.05FL)

5.3.3Setup B, adjust RGB gain (I2C) for all colors at 100 2 scale, 9300 mode. (x=0.283, y=0.297, Y=41 0.5 FL)

5.3.4Repeat 5.3.2, 5.3.3 (RGB cut-off and gain) to get both low and high 9300 scales at 100. (0.10FL 0.05FL for low scale; 41FL 1FL for high scale. x/y tolerance 0.005)

5.3.5Setup C, adjust RGB cut-off (I2C) for all colors at 100 7 scale, 6500 mode. (x=0.313, y=0.329, Y=0.10FL 0.05FL)

5.3.6Setup D, adjust RGB gain (I2C) for all colors at 100 2 scale, 6500 mode. (X=0.313, y=0.329, Y=36FL 1FL)

5.3.7Repeat 5.3.5, 5.3.6 (RGB cut-off and gain) to get both low and high 6500 scales at 100. (0.10FL 0.05FL for low scale; 36FL 1FL for high scale. x/y tolerance 0.005)

4.3.8Setup E, adjust RGB cut-off (I2C) for all colors at 100 7 scale, sRGB mode.

(x=0.313, y=0.329, Y=0.10FL 0.05FL)(same values as 6500 mode)

4.3.9Setup F, adjust RGB gain (I2C) for all colors at 100 2 scale, sRGB mode.

(x=0.313, y=0.329, Y=36FL 1FL)(same values as 6500 mode)

5.3.10sRGB brightness at 50%. Adjust sRGB contrast (I2C) to get Y=23FL 1FL for full white pattern.

(0.10FL 0.05FL for low scale, 23FL 1FL for high scale. x/y tolerance 0.005)

5.4Setup G, adjust ABL (I2C) for 30FL 0.5FL, 9300 mode. The above alignment method may be changed, as long as the final results are the same.

(The above method has least amount of adjustment and iteration steps.)

6.Adjustment of the picture geometry

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6.1Alignment of primary geometry

6.1.1Apply Timing 7 (64KHz/60Hz, 1280x1024) with black video signal, set V-position at 50%, set H and V-size for visible raster edges at all sides.

(RGB cut-off can be increased temporarily to make raster visible. After adjustment, restore RGB cut-off to original values.) Slide switch 1603 for centered raster in horizontal Direction. Adjust V-offset (I2C) for centered raster in vertical direction.

Apply Timing 8 (68.7kHz / 85Hz) with crosshatch signal and start geometry alignment.

6.1.2Adjust the Horizontal Size to 306mm.

6.1.3Adjust the Horizontal Position for centered video.

6.1.4Adjust the Vertical Size to 230 mm.

6.1.5Adjust Vertical Position for centered video

6.1.6Adjust picture tilt for correct TOP/BOTTOM lines. (Picture tube should be mounted without tilt w.r.t. cabinet)

6.1.7Adjust pincushion to get optimum vertical line.

6.1.8Adjust trapezoid to get optimum vertical line.

6.1.9Adjust balanced pincushion to get optimum vertical line.

6.1.10Adjust the parallelogram to get optimum vertical line.

6.1.11If needed, adjust the top / bottom corner control to get optimum corner geometry.

Top and bottom corner only affect top and bottom 60mm of the vertical lines.

(6.1.7, 6.1.8, 6.1.9 and 6.1.10 may need to be readjusted.)

6.1.12Store the adjusted result and exit OSD.

(The values for pincushion, trapezoid, balance pincushion and parallelogram can be copied to the other pre-set modes to shorten alignment time.)

6.2Other pre-set mode geometry adjustment

Use following procedure for all pre-set modes (except 68.7kHz/85Hz) (Timing Table 1 - 8)

6.2.1Adjust the Horizontal Size to 306mm.

6.2.2Adjust the Horizontal Position to center position.

6.2.3Adjust the Vertical Size to 230 mm.

6.2.4Adjust the Vertical Position for correctly centred vertical video.

6.2.5Adjust pincushion to get optimum vertical line.

6.2.6Adjust trapezoid to get optimum vertical line.

6.2.7Adjust balanced pincushion to get optimum vertical line.

6.2.8Adjust the parallelogram to get optimum vertical line. (6.2.5, 6.2.6, 6.2.7 and 6.2.8 may need some iteration.)

6.2.9Store the set result and exit OSD.

6.3Other pre-load modes can be visible inside the bezel.

7 Focus adjustment

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With full white pattern display at timing 68Khz /85Hz 1024x768, set brightness at 50% and adjust contrast to 25 FL at the center of the screen.

8 and adjust H and V focus pot-meters which are located at flyback transformer, until H- and V-line focus is optimal over the entire screen.

8 Adjustment of Moir

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Apply full white pattern and adjust contrast till luminance around 15FL. 1/3 area with minor moiré can be acceptable. If needed, use moir cancellation function and adjust the

H- moir or V-moir to cancel the moiré defect, then save at factory.

9 Loading DDC code

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The DDC HEX data (refer to sheet-190) should be written into the DDC by EEPROM writer or equivalent method.

10 Default settings

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The finished product should have the following default Settings: Contrast: 100%, Brightness: 50%, Color: 9300, Language: English(Chinese),

Power Save: On (Remark : Every mode is independent for eset to factory setting.))

TIMING FOR V30 GS4 107T5 71K MODEL

REFERENCE PATTERN GENERATOR : CHROMA 2135 * According to VESA version 1.0 release 0.6p