Adjusting The Focus; Adjusting The Back Focus - Christie GS Series Service Manual

6.To adjust the ROD assembly on the engine module, tighten or loosen the two M3 screws (shown
below).
7.Adjust the ROD until the yellow or blue image artifacts disappear.
8.To fix the screws, use Loctite 222 or green glue (BONBOND LOCK BB-2100).

Adjusting the focus

If the projected image appears fuzzy with the unbalance over 30 cm, perform adjusting the focus.
Warning! If not avoided, the following could result in death or serious injury.
• This projector has built-in Class 4 laser module. Never attempt to operate the projector without all
covers properly installed unless instructed to do so in this manual for service.
• Do not look into the projector lens when the laser is on. The extremely high brightness can cause
permanent eye damage.
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.
GS Series 1075 Service Manual
020-001236-02 Rev. 1 (12-2019)
Screw 1
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.
Service setups
Screw 2
25