Christie GS Series Service Manual page 21

ID Part name
1 Test equipment
2 Environment of
adjustment
3 Criteria
Adjusting the back focus
To set up for the back focus adjustment, follow the steps below.
1. Use the PC to project a Full Screen test pattern.
2. Adjust the lens zoom to its widest position.
3. Adjust the focus to make the picture as fuzzy as possible.
4. Measure the minimum imaging distance.
5. Confirm whether the distance values differ less than 3 cm from the lens specification values.
• If the value does not meet the lens specification within 3 cm, adjust the three set screws
with a M4 allen key.
• If the value does meet the lens specification within 3 cm, do a boresight adjustment.
GS Series 700-850 Service Manual
020-001054-02 Rev. 1 (04-2017)
Description
• Optional lens 0.75~0.95
• Tapeline
• M4 allen key
• Projects an image of 100 inches.
• Must be done in a dark environment (< 2 Lux ).
• The image is clear, crisp, and sharp.
1
3
A
B
2
C
Service setups
21