Question about Sony KP-51HW40 51" Rear Projection Television

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It looks as your looking into a tunnel - Sony KP-51HW40 51" Rear Projection Television

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I have a 5 year old RCA 61LPW42 HD DLP television. A few months ago a small dark shadow appeared in the upper left corner of the screen. Over time it has creeped down and become larger. Still starting...


It's the light tunnel. The tunnel is a square tube made up of 4 mirrors glued together.

It looks like this from the side: |_| (with a piece on top too.)
When the glue breaks down, it shifts inside the little mirror holder. The shifted mirrors looks like this /_/ what you are seeing is the shadow of the tilted mirror tunnel.
ON the RCA's there's not a good fix.

RCA's response:
"Ok, well sadly they do not offer the light tunnel anymore, which is what you need. Sadly you would be rendered to get a whole new light engine assembly. That would be the D.N.D module, light tunnel,color wheel,optic spanner, and oci. mirror. Your best bet would be to search ebay for a broken engine and replace it that ways."

That is the ONLY response I got from them.

I took the set apart and found the 4 tiny mirrors. I will be attempting to epoxy them together. (The set is dead anyway, why not try?)

Apr 04, 2009 | RCA HD61LPW42 61" Rear Projection HDTV

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TV has alittle dark haze,not bad,9inchs in from side,top to Bott


Probably the light tunnel. The tunnel is a square tube made up of 4 mirrors glued together.

It looks like this from the side: |_| (with a piece on top too.)
When the glue breaks down, it shifts inside the little mirror holder. The shifted mirrors looks like this /_/ what you are seeing is the shadow of the tilted mirror tunnel.
ON the RCA's there's not a good fix.

RCA's response:
"Ok, well sadly they do not offer the light tunnel anymore, which is what you need. Sadly you would be rendered to get a whole new light engine assembly. That would be the D.N.D module, light tunnel,color wheel,optic spanner, and oci. mirror. Your best bet would be to search ebay2_bing.gif for a broken engine and replace it that ways."

That is the ONLY response I got from them.

I took the set apart and found the 4 tiny mirrors. I will be attempting to epoxy them together. (The set is dead anyway, why not try?)

Feb 25, 2009 | RCA HD61LPW42 61" Rear Projection HDTV

1 Answer

RCA dlp - Shadow


It's the light tunnel. The tunnel is a square tube made up of 4 mirrors glued together.

It looks like this from the side: |_| (with a piece on top too.)
When the glue breaks down, it shifts inside the little mirror holder. The shifted mirrors looks like this /_/ what you are seeing is the shadow of the tilted mirror tunnel.
ON the RCA's there's not a good fix.

RCA's response:
"Ok, well sadly they do not offer the light tunnel anymore, which is what you need. Sadly you would be rendered to get a whole new light engine assembly. That would be the D.N.D module, light tunnel,color wheel,optic spanner, and oci. mirror. Your best bet would be to search ebay for a broken engine and replace it that ways."

That is the ONLY response I got from them.

I took the set apart and found the 4 tiny mirrors. I will be attempting to epoxy them together. (The set is dead anyway, why not try?)

Nov 08, 2008 | RCA D52W20 52" Rear Projection HDTV-Ready...

1 Answer

TOSHIBA 42PW23P rear projection television


Projection TV sets have several common problems listed below.

Problem #1) Convergence

Symptoms:

  • Screen Looks 3-D
  • Colors wont align
  • Screen may look distorted
  • No Audio/Video - makes a chirping sound.
Example Photo:
5f6e85c.jpg
Problem #2 CRT Fluid has clouded over.

Symptoms


  • Dull Video, Washed out
  • White/Bright looking video
  • Halos around objects
  • Red/Orange looking
Example Photo:
ee1ca68.jpg

You can see more examples and find a fix here...

bb0cf99.pnghttp://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

Oct 21, 2008 | Toshiba TP43H95 43" Rear Projection...

1 Answer

Grag line 4" on left side of tv


This is because one of the mirrors in the light tunnel have fallen. Common problem on your model. There are several ways to fix this, I have seen some people be able to go in and glue it back in place, others have bought a new light tunnel and put it in, and some have to replace the whole light engine to get it back to normal. The difficulty with this repair is the mirror that we are talking about here are small and difficult to handel and get back in the right place. The light tunnel is located next to the color wheel. There is the lamp to the right of the color wheel and the light tunnel is to the right. If you decide to try to fix the tunnel yourself be careful it is delicate and not always easy to do. Let me know what you would like to do and I will help out however I can.

Tim Nolan

Sep 12, 2008 | Samsung HL-R4266W 42" HDTV-Ready...

1 Answer

Samsug rear projection tv, everything looks green


Dust accumulation in color wheel, light tunnel, chip area can cause green tint.

It is very delicate area, light tunnel and chip can be easily damaged. Remove light engine assembly and color wheel. Blow dust out. Re-assemble. If the gasket around the color wheel housing is not replaced in the right position, or the housing screws not tightened correctly dust will contaminate the color wheel/light tunnel area.

Call someone that has done it a few times. If near Calgary, call me.


easyab

Jul 14, 2008 | Samsung HCM4216W 42" Rear Projection...

1 Answer

Three inch shadow running down on right side of screen


Light Tunnel needs replacement.

Web page describes:

http://calgaryconvergencerepair.weebly.com/samsung-light-tunnel.html

If you are in Calgary, Alberta, email me.

If not, look at the repair person finder at Homepage of the Fixya site.

This is only for the Samsung DLP, comment is not indended for the other makes listed below the problem.


easyab

Jun 27, 2008 | Projection Televisions

2 Answers

Diagonal Shadow


Often a piece of foam, debris or such can get in between the lamp and color wheel which can cause the symptom your describeing.

Mar 17, 2008 | Samsung HLN617W 61" Rear Projection HDTV

1 Answer

Large black bar to the left of screen


When replacing the light tunnel, the new one must be installed exactly as the old one came out. This can only be done by marking the screws and backing them our exactly 3 or 4 revolutions and then tightening the new one the exact same revolutions. When looking into the old tunnel you should have been able to see the mirror that came unglued to ensure that was the problem. The problem now can be corrected by loosening the screws on the dmd bd and manually adusting the dmd position in association of how it hits the dlp chip.

Feb 17, 2008 | Samsung HLR5067WX 50" Rear Projection HDTV

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