Question about ASK Proxima C170 Multimedia Projector

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Shadow on left side of screen

My c170 has started displaying a shodow on the left side of the display. Looks like maybe a mirror or something is out of aliniment. Can my local computer repair center fix this for me? Can you tell me what causes this?

Posted by projectorken on

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Anonymous

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May be the mirror could be out of alignment, but due to hot beam the inside lamp burns the dust inside and outside because in running mode it's too hot. I think u must take it to the good service centre to clean it fromboth side. same as scanners.Also check the mirrors, they are not changing colour, if u are using it to much.
best of luck...

Posted on Feb 12, 2008

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I would call and ask them if they repair projectors. The mirrors can get out of alignment from being bumped too much.

Posted on Dec 05, 2007

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My Mitsubishi wd57733 DLP projection tv has shadows .. almost like a fog.. what can I do to fix it?

have you cleaned the lens & mirror? you can access those by removing one or both the porthole covers. There is a porthole cover on each side of the unit (left & right ) of the screen.
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Rear projection TV displays a shadow on one corner or side of the screen.

Hi.

This tip may be helpful only if your rear projection TV is displaying a darker shadow on one portion of the screen. If the shadow shape and size will not vary, that means that there is probably a detached mirror in the device called Light Tunnel, located inside your TV.


Most rear projection TV works projecting the light from the internal lamp on the screen. Before reaching the screen , the light will pass through a 'pipe' whose internal surface is covered in rectangular mirrors, located all over the tunnel surface.

A quite common fault is caused by one of the mirror detaching from the the light tunnel internal surface , and falling down or hanging in there. This will be seen on the display as a darker shade located near to one side of the screen.

The light tunnel is located in the light engine. To repair the problem the TV must be disassembled by a technician. Accessing and disassembling the light engine is not a repair that can be done by the owner.

Click here to view pictures of a light engine for a Samsung rear projection model. The tunnel is the optical device located in the light engine.


If you are a technician, to replace the light tunnel you will have to take apart the light engine, that apart of being quite a sensitive optical device, is also the most expensive part on a rear projection TV.

In that case you may find useful the service bulletin posted below, that is illustrating how to replace the light tunnel on a light engine for Samsung rear projection TV. Please be aware, that if you attempt doing this operation without sufficient knowledge and experience, you may damage your TV set beyond repair, as the light engine is very expensive.

How to replace light tunnel on a Samsung rear projection:SERVICE BULLETIN

The file is on PDF format.

Regards.

Ginko.


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3" vertical shadow on left side of screen

Either (on this plasma) a damaged/bad sustain board for left side of screen or a problem with the Display panel--set by model number is 5-6 years old so may or may not be worth fixing.
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The first issue was brightness while watching movies. Then veritcal lines on the left side of the screen. Now faint shadows to the right of pictures on the screen. I need to know what it could be so...

Dear jon,

This problem indicates that display panel is faultyThere is an issue with display panel,so replace display panel.It will solve your problem.

I think it helps.Let me know
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I have a samsung 50 in. DLP PBO2. I have black specs all over the screen and a few white one. Whats wrong?

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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?)
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Jerry G.
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Toshiba 52HMX95 DLP has weird gray think line

DLP TVs work projecting light throught a tube covered with mirrors, called the light tunnel.

The gray shadow it is something in the middle of the light tunnel, probably a mirror that has gone out of place when you moved the TV.
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Spot/shadow on monitor and pictures

Does it appear on the photos if you look at them on a computer or print them out, and does the spot remain when you're using the menu?
If it's there all the time (on menus as well) it would suggest part of the display is starting to fail.
Also, have you done the shutter hold-up so you can check behind the mirror just in case it's something on the sensor (assuming it's not just the LCD that's failing)?
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