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

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.





SOLUTION #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.


TV set after fluid change



SOLUTION

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.

got a model number?

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!

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

set is in shutdown as it detects either a missing voltage or a short somewhere----repair in these sets is trial and error---check a few things and then begin replacing boards----an expensive situation and Pioneer is not exactly easy to get parts from on some models......

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#

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.

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

color wheel

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.





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

CONVERGENCE 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