Projector Instruction Manual

Chapter 3 Service Adjustments

Figure 3-6.

RGB Electronic Focus adjustments.

3.8 ILA

Overlap

This adjustment positions the ILA

assemblies in their sockets.

Adjustment should only be made once or whenever an ILA

replaced.

To determine if this adjustment is necessary:

1. Note the value of the ILA

bias for Red, Green and Blue so

they can be returned to these levels when this procedure is

complete.

2. Hide all three colors.

3. Increase the ILA

biases to maximum for all 3 colors. With all 3

colors at maximum, the image on the screen should be a white

screen with some colors at the edges.

4. Observe the right, left, top, and bottom of the screen. Normally,

green is the reference to which blue and red will be matched.

(NOTE: If the green ILA

was replaced, the blue or red image

should be used as the reference to which green is matched.) If

a red or blue border is present on either side or at the top or

bottom the ILA

overlap needs adjustment. If both red and blue

overlap, the border will be yellow. In either case, proceed with

the adjustment below. If there is no overlap, reset the ILA

biases to their previous levels from Step 2.

To perform an ILA

Overlap adjustment:

Remove the rear cover (Section 4.2) and tilt the electronic module

up (Sections 3.3).

1. Continue with all three colors hidden.

2. Loosen the 2 wing nuts at the top of the ILA

assembly to be

adjusted (Figure 4-12).

3. If the overlap is at the left or right, grasp the ILA

assembly and

slide it to the right or left so that the edges coincide with the

edges of the other two ILA

assemblies. CAUTION! To avoid

3-10 Model 200 Service Manual