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R5906848 /04
DP2K SLP Series
205
5.
Gently turn (by hand) the Scheimpflug adjustment nut at the lower left of the Lens Holder (reference 4
Image 17-12) against the Lens Holder front plate without disturbing the projected image.
6.
Turn in the set screw at the lower left of the Lens Holder (reference 14 Image 17-12) without disturbing the
projected image. Use a 3mm Allen wrench.
Note:
Ensure that the edges of the projected test pattern remain in place on the screen. Any
movement of the image will affect the Scheimpflug adjustment.
Tip:
Fasten the set screw and the Scheimpflug nut alternately, without disturbing the projected image,
until the Scheimpflug nut and set screw are completely tightened.
4
14
24
Image 17-12
7.
Fasten the lock nut at the lower left of the Lens Holder. Use a 10mm nut driver.
17.4 Back Focal Length adjustment
When to adjust the Back Focal Length?
If a lens is used with a throw ratio suited for the application, (lens selection depends on projection distance
and screen size) typically one would NEVER need to adjust the Back Focal Length of the projector.
A Back Focal Length adjustment is only required in case the Focus range of the installed lens does not
capture the projection screen either for FLAT and/or for SCOPE. In other words, when it is impossible to focus
the image on the screen for FLAT and/or for SCOPE. Note that the lenses for the DP2K-SLP Series projector
are varifocal. So, switching between FLAT and SCOPE (zoom action) requires a readjustment of the focus.
What is Back Focal Length adjustment?
Back Focal Length adjustment means moving the lens plane (Lp), thus the Lens Holder front plate, closer to or
further from the DMD plane. The closer the lens plane to the DMD plane the further the focus range (Fr) of the
lens will be.
S
C
R
E
E
N
DMD
Lp1
Lp2
Fr1
Fr2
Image 17-13
Do not abuse the Back Focal Length adjustment of the Lens Holder. Neglecting this will result in
loss of image quality because of the lens design. Cases requiring Back Focal Length adjustment
normally indicate incorrect lens choice (throw ratio).
Summary of Contents for DP2K SLP Series
Page 1: ...ENABLING BRIGHT OUTCOMES Service Manual DP2K SLP Series ...
Page 4: ......
Page 10: ...R5906848 04 DP2K SLP Series 10 ...
Page 14: ...R5906848 04 DP2K SLP Series 14 Safety ...
Page 24: ...R5906848 04 DP2K SLP Series 24 General ...
Page 30: ...R5906848 04 DP2K SLP Series 30 Preventative maintenance actions ...
Page 38: ...R5906848 04 DP2K SLP Series 38 Mains Input ...
Page 90: ...R5906848 04 DP2K SLP Series 90 Laser Phosphor Light Source ...
Page 94: ...R5906848 04 DP2K SLP Series 94 10 Reinstall all covers Liquid cooling circuit ...
Page 138: ...R5906848 04 DP2K SLP Series 138 Light Pipe ...
Page 147: ...147 R5906848 04 DP2K SLP Series Optical alignment 12 ...
Page 150: ...R5906848 04 DP2K SLP Series 150 Optical alignment ...
Page 248: ...R5906848 04 DP2K SLP Series 248 Card Cage ...
Page 263: ...263 R5906848 04 DP2K SLP Series Exhaust system 20 ...
Page 265: ...265 R5906848 04 DP2K SLP Series Board Diagnostic LED s 21 ...
Page 270: ...R5906848 04 DP2K SLP Series 270 Board Diagnostic LED s ...
Page 290: ...R5906848 04 DP2K SLP Series 290 Dust Filters ...
Page 294: ...R5906848 04 DP2K SLP Series 294 Troubleshooting ...
Page 382: ...R5906848 04 DP2K SLP Series 382 Troubleshooting ...
Page 394: ...R5906848 04 DP2K SLP Series 394 Projector cleaning ...
Page 395: ...395 Overview Hazards R5906848 04 DP2K SLP Series Appendix A ...
Page 409: ...R5906848 04 DP2K SLP Series 409 ...