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NEC vt460k projector has red outline around figures-prism assembly?

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3 Suggested Answers

  • 4234 Answers

SOURCE: nec vt460 projector pix in

This is a convergence problem that is not easily repaired by a homeowner. This unit should see a servicer.
Dan

Posted on May 29, 2008

  • 2920 Answers

SOURCE: NEC VT560 LCD Projector - Projector Colour probs

replace the bulb

Posted on Nov 21, 2008

  • 87 Answers

SOURCE: I have a 61

The convergence is off. The convergence is basically the assimilation of the image on the screen from the three "guns" behind the screen. There should be a menu option to align the convergence in the image portion of the menu. If this does not fix the issue, then your convergence chip might be on it's last leg.

Posted on Oct 23, 2009

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How do I get rid of the dark shadow across the top of the screen?


This is actually a fairly common issue with the NEC projectors, especially if they are mounted from the ceiling (upside down). The problem is the compartment immediately after the bulb. What happens is the 'paste' they use to adhere the glass prisms to it's plastic component wears off overtime due to the immense heat from the bulb being projected onto it. The glass prism piece ends up leaning against the bulb compartment creating the annoying 'shadow'.

Heads up; you will need to take apart almost the whole projector. You'll need to expose the mirror array to get to the compartment just after the bulb. Once you've dissassembled the projector down to the mirror array, take out the problem part. It's a small black plastic cube frame that's held in by a screw and has 3 glass/plastic prism pieces. Looking down at the disassembled projector, you may not be able to see the glass/plastic prism pieces but I can assure you that it is the small compartment immediately after the bulb compartment.

Once you've identified the component and taken it out, you'll see the prism piece(s). The problem prism is the one that sits closest to the bulb and it was either slightly loose or had fallen off completely. Please note that there is another one of these exact prisms on the other side of the assembly you pulled out just behind the plastic looking prism. This secondary one come loose very rarely but if it does, you'll need to fix that too.

The Fix: Since the component is going to be exposed to immense heat again, you'll need to buy an adhesive that can withstand that heat (think at least a few hundred degrees for safety sake). I bought the JB-Weld Steel Reinforced Epoxy since it can withstand heat up to 550F. Make sure you read the instructions before starting. An added suggestion is to scrape all the old residue from the old adhesive off the component and prism(s) first, then scratch some grooves into the connecting pieces and apply the epoxy/adhesive. Do not scratch up the actual prism itself; scratch the 'extra' glass on the prism piece where it will connect with the plastic component. The grooves help the epoxy bind to the pieces and I highly suggest this since I've had to re-do a few in under a year. Let the epoxy set for a good 24 hours before putting the projector back together.

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1 Answer

How do I clean the Prism/LCD assembly on Eiki LX-85


LCD panels with the prism assembly,
put the assembly into the water,clean with some kitchen cleaners
to dry the assembly up with hair dryer
suggestion: keep the panels and the prism as a assembly,do not take the panels apart from the prism.
any questions, feel free to contact me
We supply original projector lamp,bulb,accessories,Lcd panel,Lens,DMD chip,color wheel,motherboard,powersupply,ballast... with high quality and competitive price.
have a nice day!
Jerry,Lampdeng Limited
skype:lampdeng

Mar 03, 2014 | Office Equipment & Supplies

1 Answer

Dirt on the prism LCD assembly


LCD panels with the prism assembly, put the assembly into the water,clean with some kitchen cleanersto dry the assembly up with hair dryersuggestion: keep the panels and the prism as a assembly,do not take the panels apart from the prism.

Mar 03, 2014 | Office Equipment & Supplies

1 Answer

Alignment


It seems that the lcd panels are failed
Have a nice day!
We supply original projector parts: lamp, bulb, Lcd panel, Lens, DMD chip, color wheel,
motherboard, powersupply ... with high quality and competitive price.
Jerry
Lampdeng Limited

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how to fix image that is half darken on a NEC NP400

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1 Answer

I have a yellow circle on the screen from the projector and need to purchase the prism assemble


it may not be the prism but rather a polarizer glass plate. take the cover off and inspect the optics parts to see which one may be heat affected and damaged.

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1 Answer

Double vision my NEC MT1055 lcd projector has double vision on the menus - looks like the menu was burned in a half in to the left


looks like one of your lcd panels is ghosting. If remember correctly your going to be asked to replace the whole prism.

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its not the bulb problem . the lcd block need sto be replaced , better to buy new projector

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1 Answer

Sony LCD Projector - burned prisms


I have the same projector, but my problem is with red.

A replacement prism assembly is about $2k.

If you can get your hands on another projector for cheap, that's your only hope. You can swap out the blue lcd panel from your prism with someone else... it's a bit of mucking around, but worth it of you can.

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1 Answer

Nec vt460 projector pix in focus but red ghost around figures


This is a convergence problem that is not easily repaired by a homeowner. This unit should see a servicer.
Dan

May 29, 2008 | NEC Televison & Video

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