I know a bunch about electronics but not much about optics. I recently acquired a 45" rear projection crt tv with convergence problems. After digging around in it i nodiced that the mirror was cracked and the lenses were dusty. First, how much would it effect the picture to have a crack across the mirror, I know it would hurt the picture but I'm not sure how much. Then, is the mirror anything special or could I just go to a local glass shop and have them cut me a new one? Lastly, is there any special cleaners that I should use to clean the lenses or is there any cleaners that I should stay away from? Thanks in advance.
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If the model is a WS-65809 that sey doesnt come apart. Actually very few rear projection TVs can be seperated Some RCA TVs can be disassembled to several pieces. Also I would let customer know that because a CRT TV has three CRTs that are aligned to each other , Moving the TV will cause the convergence to be adjusted. Based on model it can be just pressing the auto convergence option with the remote, But older rear projection TVs (2003 and older) have been known to blow ICs after a move when trying to reset the convergence. The ICs weaken over age and they can blow anytime the convergence adjustment feature is used, so its always a good thing to let someone know that even if very careful when being moved there set may develop convergence issues after a move because its a 3 CRT rear projection TV
All projection TV sets have two very common problems. One is convergence ( 3D/Warped video or dead set) the other is CRT fluid ( Dull Video). Here are more details and solutions for both.
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. In some cases the TV will also not show any video. 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. Power light will blink. TV may also make a chirping noise.
Here are some pics of convergence problems.
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.
Check all of your video connections and make sure everything is connected properly. Make sure your video sources i.e. cable box, etc. are configured to the proper output resolution. Since your T.V. is a rear projection CRT, I would recommend you do a convergence calibration. This is usually the problem with those kinds of televisions when the picture gets blurry- especially if it has recently been moved. The convergence procedure re-aligns the electron guns inside the T.V. Consult your manual or download one if you are unsure how to perform the convergence calibration.
This tv 100% have a convergence problems,it dead.The tv convergence board,must require changing 2 STK convergence ICS and some or all it resistors.U have tools like a soldering iron,desoldering pump and solders?Know basic electronic,can u do soldering?Tries website like Tvrepairworld.com,Tvrepairkits.com to buy a convergence kit to do the repair ur self.Or the shop,will cost u $300-350 for parts and labors.
sound like when moving tv u knock optical block out of focus to fix problem open up light engine assuming u know a little about electronics reajust lense with mirror in frot of tv u in back adjust untill perfect /// if u have old school projection tv suonds like u have a convergence problem open tv ther should be 2 large black squares on edege or board these r ics they should have letters stk on them replace go 2 nte semiconducter.com purchase 18$ 2 =36 bucks 4 repair good luck i hope i saved u a few bucks not diffulcult takes time
You need the STK392-120 convergence amps replaced along with possibly a couple of 6.8 ohm resistors.As a technician this job can range anywhere between $185.00-$250.00.If you can solder the dificulty level will require some electronics experience.Good luck!!