Wells-Gardner D9100 service manual Adjustment Specification

7. ADJUSTMENT SPECIFICATION:

7-1. Adjustment Sequence:

The monitor requires a minimum of 15 minutes of warm up time before adjustment.

7-2. Adjustment Sequence:

FBT B+ Voltage → G2 Voltage → Hor. Center → Hor. Size → Hor. Position → Ver. Size → Ver. Position → Side-pin → Trapezoid →

Focus → White Balance → Convergence

7-3. Adjustment Procedure.

How to enter the Factory Mode: Press Menu and Down simultaneously and hold down for three seconds. Adjust BRIGHTNESS and CONTRAST to “50” amplitude.

7-3.1 FBT B+ voltage adjustment.

1.Input the crosshatch pattern with the 31KHz 640*480 mode.

2.After connecting a digital voltmeter to D316, cathode and the frame ground, adjust FBT B+ voltage to 76V +/- 0.5V using VR301.

7-3.2 G2 Voltage adjustment.

1.Input the crosshatch pattern with 31 KHz 640*480 mode

2.After connecting a DC high voltage meter to the G2 of the CRT socket, adjust G2 voltage to 450 +/- 10V by changing SCREEN VR of FBT.

7-3.3 Geometry/Display Adjustment.

Refer to controls and adjustment (Article 6)

7-3.4 Focus Adjustment

1.Input the “H” character pattern with 31 KHz 640*480

2.Adjust the focus for the best balance at each point of A,B,C,D,E as shown below by rotation the focus VR of FBT

3.For Dual Focus 17” monitors, adjust FOCUS 1 and FOCUS 2 for sharpest horizontal and vertical lines on a crosshatch pattern in oval area from point B to point C of display. Check overall focus in center and corners.

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