JVC 250 service manual ILA Remove and Replace

Chapter 4---Optical

8.Loosen the two hex bolts (see Figure 4-10) on the ILA® assembly in front of the Relay Lens.

9.Slide the Relay ILA® /Lens/CRT assembly forward or backward to achieve the sharpest spacer ball focus.

NOTE: Do not use the projection lens focus while performing this step.

10.Tighten the hex bolts on the Green ILA® Assembly and the wing nut on the Green Relay Lens.

11.Repeat Steps 7-10 above for other colors that need ILA® Back Focusing. Be sure to hide the other two colors.

ILA® Remove and Replace

Each projector has three ILA® s; each located on the front of a Relay Lens.

Tools Needed

4-mm Hex wrench

Parts Needed

Super Contrast

Blue 102630-14

Green 102630-15

Red 102630-16

NOTE: Do not interchange Super Contrast ILA® s. The Compensators on the ILA® s are color specific and can not be interchanged i.e. the green ILA® can not be put in the red channel or blue channel.

To Remove the ILA®

1.It is not necessary to power off the projector.

2.Remove the Rear cover. It is not necessary to tilt the Electronics Module up.

3.Loosen the two Hex nuts using a 4-mm Hex nut wrench and slide the ILA® /Relay Lens/CRT Assembly back.

4.Loosen the two wing nuts on the ILA® and pull back the spring clip.

5.Disconnect the connector from the ILA® and remove the ILA® assembly (it will slide out with some resistance).

It will be necessary to reset ILA® bias, and Overlap. ILA® Compensator, G2 setting, and shading for the ILA® being replaced should be checked.

Model 250 Service Manual 4-19