VS-50XL20U, VS-67XL20U, VS-50XLW20U
Set-up and Installation Manual
62
1.11. Condenser lens adjustment (for VS-50XL20U and VS-67XL20U)
When the brightness is low after lamp replacement, the brightness may increase if you adjust the
position of the condenser lens.
You don’t have to adjust it at initial setting since the position has been adjusted optimally with built-in
lamp at factory.
[Procedure]
1. After turning on the main power, wait until the brightness becomes stable (about three minutes).
2. Open the lower door and upper door in the rear of the projector.
3. If the WHITE BOOST (chapter 1.5.5.9, on page 32) is set other than OFF, change the setting
OFF in WHITE BOOST in MISC FUNCTION in the system menu.
4. Display any internal test pattern except “full-bit white” by [TEST] button.
5. Press and hold [DISPLAY] button in advanced mode to display the status information. The
luminous sensor value is indicated in the lowest line, L.SENSOR.
6. Loosen the adjustment screw on the optical engine described below by Allen wrench (2.5mm).
7. Move the screw position along the flute to maximize the luminous sensor value and fix it.
Note: Do not tighten it with excessive torque (suggested torque: 0.38Nm
+/-0.03
). Also fix it not to
misalign the position.
8. Set back the WHITE BOOST setting.
9. Set back the lower door and upper door.
Adjustment screw