Question about Pioneer Projection Televisions

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1996 pioneer projection model#sd5191 is making a hissing noise when turned on and also makes flashes of color through the screen what do i replace?? I recently cleaned bulbs and back mirror and behind screen and was very clear afterwards then the whistling noise started,,,what do i do,,,Brian johnson

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  • Pioneer Master
  • 8,617 Answers

Sounds like the HV leads may have been disturbed on the flyback or the flyback itself may be going bad. The set is 12 years old now so it wouldnt be unusual for the flyback to need replacement. Its actuallt an easy inexspensive repair if you do the job yourself which only requires basic soldering skill. let me know if you need more info or where to get a flyback for your set.

Posted on May 22, 2008

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Power supply


Projection TV sets have two very common problems. One is convergence ( 3D/Warped video) the other is CRT fluid ( Dull Video). Below are more details for both items. Also, complete repair kits with instructions and repair support are avail from site such as www.TvRepairKits.com

Common Problem #1) Convergence has gone out

Projection TV sets need to have all three colors - RED - BLUE - GREEN - lined up correctly on the screen in order for the video to look normal. When its out of alignment the video will look 3D, wavy, distorted, etc. Most of the time you just need to adjust your convergence in the TV menu. If you cannot adjust it in the menu - then your convergence is broken and needs to be repaired.

This is a very common failure on these projection sets and a fairly simple DIY fix. All projection sets including Samsung, RCA, Sony, Philip Magnavox, Panasonic, Pioneer, Akai, GE, JVC, Toshiba, and others at some point will have the same problem.

Common Symptoms include....
  • Screen looks 3D
  • Colors don't line up
  • One or more colors can't be adjusted when using the convergence menu.
  • Screen is bowed or warped.
  • TV shuts off after powering on. The power light will blink. TV may also make a chirping noise.
Here are some pics of convergence problems.


7859b01.jpg

e87380c.jpg
69189a5.pngSOLUTION #1

What you will need to do is convergence. You can get a repair kit from TvRepairKits.com . It includes replacement parts,step by step instructions, support, etc.

Common Problem #2) CRT Fluid is Cloudy

Projection TV tubes have a liquid coolant that is used to keep them from overheating. After many years the coolant in the blue and green tubes will become cloudy and cause the screen to look dull, red/orange, etc. You may even see halos around images.

Picture of a set that needs the fluid changed.

578ba6c.jpg
TV set after fluid change

65af323.jpg

69189a5.pngSOLUTION

What you will need to do is replace the coolant and clean the crt. You can get a repair kit from TvRepairKits.com . It includes replacement coolant,step by step instructions, support, etc.

Sep 29, 2012 | Philips Magnavox 51MP392H Rear Projection...

1 Answer

I have a pioneer Pro 200 and have had it for a dozen years. I have an HD in my office and the picture is so good and bright on the Pioneer I just cannot bring myself to get rid of it. The TV blinks off...


Im going to guess that if you try turning it on, sometimes you hear a "click" and nothing then the problem persists over and over until it finally turns on? If so, it's a problem with the power that "jumpstarts" the screen. Worn out capacitors on older models don't hold the necessary charge it takes to "start" the inverter that powers the screen. Once those start to go, it's usually bye bye for the tv. That is IF this is your problem. Let me know. Sometimes it makes hissing or cracking noises along with it. hope this helps!

Jun 11, 2012 | Pioneer PRO-200 60" Rear Projection...

1 Answer

Red screen


Your red tube is going bad or the CRT board is cracked. Either way your TV is done. You cannot get replacement parts anymore.

Jun 06, 2012 | Philips 51PP9200D Television

1 Answer

We have a Samsung #HLN5065WX/XAA that has started making a very strange noise and flashing "Check fan no. 2". The colors are also off. What can I do to fix this?


The tv is making loud noises like humming or motor noises and tv have strange colors flashes or black and white backgrond flashes.The tv Colors wheel it is dying and not spinning the right speed of it RMP speed any more.The tv colors wheel must have be replaced to solved this problems.Have no mechanicals skills hire a tv tech. to change the tv colors wheel because u have to take out alot of mechanical parts out before u can come to the tv colors wheel itself to replace it.

Aug 20, 2011 | Samsung HLN5065W 50" Rear Projection...

2 Answers

My HLN5065WX will turn on, play for about 1 minute, flash funky colors then go black. Once this happens you can not shut down the TV. You must unplug to turn off.


Bad Color Wheel, its located behind the Lamp Pull Lamp out and use a Flash Light You should be able to see it.
Encompass Parts Distribution 1-800-638-3328
Samsung Parts.com 1-800-627-4368
You can also go to Encompass website and look up your Model#

Oct 27, 2010 | Samsung HLN5065W 50" Rear Projection...

2 Answers

The screen color started flashing funny. I turned the TV off. When I turned it back on, it makes a horrible groaning almost grinding noise, on and off, then finally stops trying to do what ever it's trying...


This tv have a colors wheel,it dying,now it dead.Colors flashes black&white and grinding noises,the colors wheel was spinning off of it motor axis and rubbing it sides wall.The colors wheel,now require changing to make the tv work again.The colors wheel it pretty hard to replaced,because it require take out many machanicals parts even can get to the colors wheel to replaced it.Best it to hire a tv tech. to do the job.If u never done or change anythings,that require take out alots and many machanicals parts before.

Oct 20, 2010 | Samsung HLP4663W 46" Rear Projection HDTV

1 Answer

Dlp TV won't turn on


possible color wheel , or just a lamp. depending on what the noise sounded like. check out some videos on you tube on how to replace color wheel. Not to hard

May 27, 2009 | Samsung HLR5667W 56" Rear Projection HDTV

1 Answer

Distorted picture


Projection TV sets need to have all three colors - RED - BLUE - GREEN - lined up correctly on the screen in order for the video to look normal. When its out of alignment the video will look 3D, wavy, distorted, etc. Most of the time you just need to adjust your convergence in the TV menu. If you cannot adjust it in the menu - then your convergence is broken and needs to be repaired.

Convergence problems are very common on all Projection TV sets including Sony, Samsung, JVC, Philip Magnavox, Panasonic, Akai, Pioneer, Hitachi, Zenith, and others. You can get a convergenece repair kit from the link below.

Common Symptoms include....
  • Screen looks 3D
  • Colors don't line up
  • One or more colors can't be adjusted when using the convergence menu.
  • Screen is bowed or warped.
  • TV shuts off after powering on - TV may also make a chirping noise.
Here are some photos of convergence problems.

49abec3.jpg
f0add3d.jpg


Here is a quick test....

Using your original remote go-to the settings menu then goto the convergence section.

Try to adjust the red and then the blue convergence.

You should be able to move RED and BLUE in all directions - up, down, left, and right.

If you can't move them in all directions or cant move them far enough your convergence chips are bad and should be replaced. This is a common problem.

Note: If you TV has as flash focus or magic focus button only try pressing the button. If it fails to fix the convergence your need to fix it. See below for a solution

93a1209.pngCONVERGENCE SOLUTION

You will need to replace the convergence chips and possibly some convergence resistors and pico fuses.
This is a a fairly easy DIY job if you know what you are doing. If you have never done this before we would advise calling a shop or if you want to do it yourself get a complete kit with instructions and support from www.TvRepairKits.com

Feb 18, 2009 | Pioneer SD-643HD5 64" Rear Projection...

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