Adjustment Procedure - NEC PH3501QL Installationsanleitung

Lens image surface adjustment
(Applicable lens units: L4K-11ZM, L4K-15ZM and L4K-20ZM)
When using the L4K-11ZM, L4K-15ZM or L4K-20ZM lens units, perform the image surface adjustment before
adjusting the lens' focus.

Adjustment procedure

1. Loosen the lock bolt.
2. Set the dial to the value of the projection distance.
Example: If the projection distance is 20 m, set the dial to between 15 and 25.
3. Tighten the lock bolt.
m
5
7
1 0
1 2
1 5
2 5
4 5
∞
Lock bolt Dial
80
4. Projector Adjustment and Connecting