sanyo PLC-SU31 RGB lenses are out of horizontal alignment producing 3 images instead of one. There is no menu item to adjust this. How can I adjust it manually? - AVS Forum
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post #1 of 6 Old 07-06-2012, 06:20 AM - Thread Starter
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sanyo PLC-SU31 RGB lenses are out of horizontal alignment producing 3 images instead of one. There is no menu item to adjust this. How can I adjust it manually?
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post #2 of 6 Old 07-06-2012, 08:41 AM
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There is only one lens. It uses a '3LCD' optical engine. Was this dropped? It sounds like you need to get it serviced to either re-align or replace the light engine.
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post #3 of 6 Old 07-06-2012, 10:30 AM - Thread Starter
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By taking off the top cover to the unit, I can see the Red, Green, Blue lenses. but I still would like to know how to adjust them. Green and Blue are very close to alignment, Red is way to the left. Has anyone found a way to manually adjust them?
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post #4 of 6 Old 07-06-2012, 10:32 AM - Thread Starter
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If I need to take it in or send it off for service, where is the closest and best place near Oklahoma City?
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post #5 of 6 Old 07-06-2012, 10:58 AM
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Contact Sanyo for a factory authorized service center.
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post #6 of 6 Old 07-07-2012, 09:40 AM
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You aren't seeing "color lenses" ... the white light produced by the lamp is split into red, green, and blue light. Each color of light has it's own optical path. And there are 3 LCD imagers, one in each of the 3 light paths.

What is required is that you align the 3 LCD imagers. If there is no control in the user menu to do this (some projectors do have this feature... Some Epson models, some new Sony projectors like the 4K model, JVC projectors, etc.) it is not something you can do yourself.

The software alignment tools in the projectors mentioned above actually allow you to do different amounts of adjustment in different parts of the screen. For example, you may need to adjust blue 3-clicks to the right in the lower left corner of the screen, while blue needs to be adjusted 1 click to the right in the right center of the screen. You cannot do that sort of alignment precision with any mechanical adjustment of the 3 LCD imagers.

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