UD100 User Guide Document: UD100-3
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14.5. Image position shift after installation
The position shift in the projector will be enlarged to more than 10x due to projection distance. 1 mm
image shift inside projector may appear 1 cm image shift on the screen. User will clearly see blurred
effect on overlap region in edge blending setup.
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There will be some image position shift after system setup. The main reasons are as follows:
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Thermal drift due to projector internal temperature change. The image position in projector
power on stage and after 20-30 minutes may have big difference. Different projector will
have different thermal drift range.
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Stability of rack mounting system.
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Projector structure change after installation due to weight and thermal effect.
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Cable connection and cause weight balance issue.
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Change lamp.
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Earth quake or caused by human reasons.
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The first projector image position calibration should be done within one month after installation.
The second calibration may be required after 3 months, then every 6 months or once a year.
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If user finds big position shift and doesn’t know the real issue. Please follow below procedures
to confirm the issue is from GeoBox or not.
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Turn off GeoBox and open projector internal test pattern.
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Mark the corner positions of the projector image and overlap region borders.
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Check projector image shift condition after some time with GeoBox in OFF condition.
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User will clearly identify that the position shift is from GeoBox or not after this procedure.
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GeoBox is digital processor and will not change image position only for few pixels.
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Please open test patters in GeoBox before edge blending and put marks on 4 corners of each
projector as reference for future image position recovery by [2x2] alignment.
14.6. System crash and malfunction
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After FW update, please reset the system through a pin inserting to reset hole on the back panel
for 5 seconds to avoid abnormal settings inside the system. It will erase Profile settings.
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If only one channel is abnormal, please reset this channel through remote controller. It will not
affect other channels.
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When the input source is PC graphics, only [Brightness], [Contrast] and [Sharpness] items under
[Picture] menu can be executed. If the input is 4:2:2 video source, all the items are functional.
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When implement [Corner Wall] alignment, other geometry functions will be not functional.
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Remote controller may be interfered by environment and can’t be smoothly operation.
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When geometry alignment is over the maximum adjusting range, the system may crash. It can be
recovered by system reset.
