Service setup
H Series Service Manual
18
020-000802-03 Rev. 1 (12-2016)
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, adjust the focus to make the picture as fuzzy as
possible, and measure the minimum imaging distance. Confirm whether the distance values are
within the lens specification. The allowed tolerance is 3 cm.
• If the value does not meet the lens specification, adjust the three set screws with a M4
hex key.
• If the value does meet the lens specification, do a boresight adjustment.
2
Environment of
adjustment
• Projects an image of 100 inches.
• Must be done in a dark environment (<2 Lux).
3
Criteria
• Unbalance <=50cm
3
1
2
A
B
C
3
1
2
A
B
C
3
1
2
3
1
2
A
B
C
