Adjustment - Eiki EK-800U Service Manual

Chapter 4 Test & Inspection

4-5 Adjustment

1. Focus Adjustment
Note: This step must be done only when the optical engine
module is changed.
Inspection item- Check the focus under the pattern of full
screen by the distance of 2.5m.
Criteria - Unbalance<=30cm
Procedure - If the unbalance is over 50cm,pls do the
focus adjustment as below procedure.
1. Back focus ensure
- Change to "Full Screen" pattern, adjust the
lens room widest, adjust the focus fuzzy,
then measure the minmum imaging distance,
confirm whether the distance value in the
lens specifications of +/- 3cm.
- If not, adjust the three setscrew to the
specification.
- If yes, go to next step to do bore sight
adjustment.
2. Bore sight adjustment.
- Use focus button to adjust focus to make
position 1 in focus.
- Once position 1 is in focus, check position 2.
If position 2 is not in focus, use focus up or
down key to adjust focus till it is in focus.
- If pressing focus up key can focus position
2, adjust setscrew B clockwise. If pressing
down key can focus position 2, adjust set
screw B counterclockwise.
- Refocus position 1 and see if position 2 is
also in focus. If not, repeat step 1 to 3.
- Adjust position 3 is the same method as
position 2.
- Repeat step till positions 1, 2 and 3 are in
focus at the same time.
4-10
Full screen
EK-800U