JVC 250 service manual 29 CRT Mechanical Focus adjustments CRT Rotation

Chapter 5---Electronics

Figure 5-29CRT Mechanical Focus adjustments.

CRT Rotation

The CRT tilt adjustment aligns the CRT level with the screen. This is a factory-set adjustment and should not need adjusting unless the CRT or yoke is moved.

Tools Needed

1.5-mm Hex-head wrench

#0 Pozi-drive Phillips-head screwdriver

3-mm Hex-head wrench

To perform the CRT Rotation adjustment:

1.Remove the rear cover.

2.Power the projector ON and allow it to stabilize for at least 15 minutes.

3.Tilt the electronic module to the full up position.

4.Select Center/Lin pattern (test pattern #8).

5-54 Model 250 Service Manual