JVC Model 200 service manual CRT Rotation, CRT Mechanical Focus adjustments

Chapter 3 Service Adjustments

CRT Holder Ring

Set Screw

CRT Thumb Screw

Focus Lock

Screw

Set Screw

Guide Plate

CRT Shield

Figure 3-5.CRT Mechanical Focus adjustments.

3.6CRT 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.

Remove the rear cover (Section 4.2) and tilt the electronic module up (Sections 3.3).

1.Select Test Pattern 8, Center/Lin.

2.View the color for the CRT that requires rotation. Hide the other 2 colors.

3.In the Geometry menu, set “Reg Enable” to off by unchecking the box. Unchecking the Reg Enable box temporarily disables any convergence corrections that have been performed with a different CRT/Yoke assembly and sets these values to the default levels so that CRT Rotation can be accomplished correctly.

3-8 Model 200 Service Manual