Question about Panasonic PT-50LC14 50" Rear Projection HDTV-Ready Television

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Experts on Fixya got your Thank you.

Posted on Jan 28, 2009

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6ya6ya
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Tv picture and volume shut off, humming noise coming from back of tv even after shutting off tv and receiver. Had to unplug. what's the problem?


Hi the5,
Welcome to FixYa.
My name is John.
I will be assisting you with your issue.
If you are good at soldering and not scared of HIGH VOLTAGE,
this would be a easy fix. re-post and let me know, and I will let
you know the tools and steps to do this job.
Thanks for choosing FixYa.
John

Jan 06, 2011 | Mitsubishi WD-52525 52" Rear Projection...

Tip

Thank you very much. The pictures posted are exactly the problem. I'll try and...


Below are two of the most common problems encountered with projection TV sets.

Problem #1 - CONVERGENCE PROBLEM

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 Projection TV sets and a fairly simple DIY fix.

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.


1d5e2cf.jpg


ff5b9f6.jpg
7deade1.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

47a7bc4.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 TvRepairKits.com

Their kits include a step by step instruction guide, original OEM Sanyo STK chips, convergence resistors, pico fuses, thermal paste, email/phone support, etc.

Problem #2 CRT Fluid is Cloudy

Projection 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 video.

Pic of a set that needs the fluid changed. Notice how dull the colors are and how white the screen looks. The screen may also look red, orange, dull, etc.

BEFORE

7c190d8.jpg

Set after fluid change. Notice how bright the colors are now. Everthing looks crisp and sharp again.

AFTER

a798d23.jpg



724bcba.pngSolution #2 - CRT FLUID FIX


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.

on Nov 28, 2009 | Philips 46PP9302 46" Rear Projection...

1 Answer

WHEN SETTING CONVERGENCE, BLUE WILL NOT GO UP OR DOWN BUT WORKS SIDE TO SIDE


Hi astump,
Welcome to FixYa.
My name is John.
I will be assisting you with you issue.
It,s time to replace your CONVERGENCE IC,s.
If you can solder, and have a good steady hand, and can be guided,
you can land this job. Post back if you want to do this and I
will let you know what tools and step are needed.
Thanks for choosing FixYa.
John

Jan 06, 2011 | Mitsubishi VS-50805 50" Rear Projection...

1 Answer

I also have one of thos RCA 52 inch tvs and i am having a problem with a double screen like the outline of objects on tv is not centered so it looks like two people and the color is a green and a red...


You most likely have bad convergence IC chips. These chips are located on two large metal heat sinks on the circuit board. They are not very expensive ($60-75 for the pair) but replacing them requires de-soldering the old ones from the board and soldering in new ones. If you have some soldering  experience with electronics It may be a repair you'd like to try. A shop will want $300 and up to do this job. If you'd like further advice on this post back here and I can assist you.

Dec 04, 2009 | RCA D52W20 52" Rear Projection HDTV-Ready...

1 Answer

HITACHI LCD


Hi,

Appreciate the direct "Ask Me".

Offhand without a specific model number or better yet a chassis number, I would be guessing that the blue being absent makes the green too pronounced. This being so on an LCD projection made by Hitachi would indicate probable fault with the light engine. You may want to reference this post that indicates Hitachi would supply the part for free. Incidentally, another post outlined how a user performed a DIY (do-it-yourself) workaround.

Hope this be of initial help/idea. Pls post back the model number or chassis number, how things turned up or should you need additional information. Good luck and kind regards. Thank you for using FixYa.

Nov 11, 2008 | Televison & Video

1 Answer

Have a hitachi 55vg825, gets power but will not turn on


Good Day, titanlife;

So far you have done a great job!

But now what is wrong? I would suspect the power supply, ballast, but the best advice I can give you is that you contact an authorized service center and have come to your home and (make sure) give an estimate.

Sorry, I wasn't more helpful.

Good Luck, big IRISH.

Jul 31, 2008 | Hitachi UltraVision CineForm 55VG825 55"...

1 Answer

Have a panasonic pt-47wx53 47"


crsheidt,
I am having the same problem.Terryfic gave me some good advice I am the process of taking. The service manual will help you locate the convergence IC circuit board so you can remove it to replace the IC`s. If you need I can send you a copy of the location picture from the service manual.I recommend you contact Terryfic for exact advice.

Johnny

Mar 31, 2008 | Panasonic PT-47WX53 47" Rear Projection...

3 Answers

Panasonic Projection HDTV


Hi odd johnny,

My sincerest apologies. My area of experience with Panasonic models are rather limited to diagnosis and power supplies. May I recommend instead hdtv_guru, techman or terryfic who I consider more knowledgeable and experienced on convergence circuits.

Nonetheless, I appreciate you bringing your concern to my attention and wish I could do more.

I have taken the liberty of pre-informing these gentlemen of your concern.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards.

Thank you for using FixYa.

Mar 25, 2008 | Panasonic PT-47WX53 47" Rear Projection...

1 Answer

THANK YOU!!!!!!


Youre welcome, and congratulations on fixing your set. No advice on prevention, just remember that if your set does exhibit any warning signs its better to shut it down and do some investigating and you will save yourself alot of money in repair bills. Enjoy watching the TV that you have fixed. It sure does feel good to have it back to normal doesnt it. Glad I could help you out.

Mar 08, 2008 | Televison & Video

1 Answer

Samsung DLP HLN5065WX/XAA


krugie, get it replaced now or the lamp will burn up, be advised that they are expensive to get replaced, not an easy job to do, fix it now or pay much more later is the best advice I can give you, good luck, BMW Rider

Dec 28, 2007 | Samsung HLN437W 43" Rear Projection HDTV

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