B-Tech BT899XL-AD Installation Manual & Parts List page 10

8
Adjusting the Projector
i) To tilt/roll, loosen items 17, adjust an d re-tighten.
+ / - 13º pitch
+ / - 6 º roll
ii) Micro-adjustment (if installed).
Loosen item 17 (M6 x 12mm screws) by one turn using item 29.
Micro adjust item 21 (M4 x 30mm screws) using item 29 to roll or tilt the projector.
M6 x 12mm
Screw
21
M6 x 12mm
17 21
Screw
17
Tilt
TILT
29
Roll
ROLL
21
M4 x 30mm
Screws
10