Wells-Gardner D9300 Series service manual Wells-Gardner Electronics Corporation

Wells-Gardner Electronics Corporation

B.Exit and save. (Save is automatic)

1.After finishing adjustments, select “RECALL” using “UP/DOWN” key.

2.Press “SEL” key until OSD disappears. The adjusted value is saved and exits from the factory mode.

C.Adjustment.

All adjustment methods are same as user’s control mode except “COLOR”

7-5 White balance Adjustment:

A.Pre-adjustment.

1.Warm up monitor for 15 minutes.

2.Input the small window pattern with 31KHz 640*480 mode.

3.Degauss the screen with External degaussing coil.

White Balance adjustment (background raster).

1.Remove the video signal.

2.Adjust the sub-brightness of background raster to be 1.0FtL +/- 0.3FtL with SUB BRIGHTNESS control VR501.

B.COLOR ADJUSTMENT.

COLOR 1 - 8500°K: X=0.285, Y=0.294

COLOR 2 - 6500°K: X=0.312, Y=0.329

Check at 2.5fL (BIAS), 50fL (GAIN) light output levels.

Reference size, Horizontal = 361mm +/- 4 mm from CRT phosphor edges. Vertical = 270mm +/- 4mm from CRT phosphor edges.

1.It is best to use a centered small white box pattern. Before adjusting the “COLOR”. “CONTRAST” should be set at the maximum and “BRIGHTNESS” should be set to “50”.

2.In the factory mode, toggle down to “COLOR” using “UP/DOWN” key.

3.Select “COLOR” by pressing “SEL” key. Color sub-menu appears as left below figure.

4.Search a color temperature you want to adjust (gain or bias) using “UP/DOWN” (“GAIN” is the high-beam area’s adjustment and “BIAS”, the low-beam.)

5.Select any item desired by pressing “SEL” key then the OSD changes to the sub-menu as shown in figure below-right.

6.Adjust color temperature using “SEL” and “UP/DOWN” key. (“SEL” key: moves item position, “UP/DOWN” key: changes value.)

7.In the “GAIN” mode, “CO” means sub-contrast adjustment. Sub-contrast is adjusted using “UP/DOWN” key.

8.Press the “MODE” key to finish the “GAIN” or “BIAS” adjustment.

9.If you want to adjust other “GAIN” or “BIAS”, repeat from steps 4-8.

10.Press “MODE” key again to finish the “COLOR” adjustment.

11.When done with the factory adjustment, select “RECALL” as in step B.“Exit and save”.

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