Question about Sony Grand WEGA KDF-55WF655 36" Rear Projection HDTV

2 Answers

Sony Plasma KDE-P42XS1 Television

The set is 3 years old and has developed a fault with the picture. It keeps on dissapearing and reappearing as soon as it is warmed up.

Posted by on

2 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.


    An expert whose answer got voted for 500 times.

  • Master
  • 1,734 Answers
Re: Sony Plasma KDE-P42XS1 Television

Looks to me as an serious (but not uncommon) PSP board problem with Panasonic plasmas. Contact a Panasonic service center.

What problems have people had with quality control on these displays? Are they covered under warranty?

  1. Certain displays emitted an extremely loud buzz. This was covered by warranty repair.
  2. Certain displays had a problem with the Y/C delay on their S-video input. This was also correctable.
  3. One person reported red vertical lines on his display.Was this covered by warranty? Was it an input problem or a pixelproblem?
  4. Afew bad pixels here and there are not covered underwarranty. Largeclusters are generally covered. It's up to Panasonic'sdiscretion. Onthe plus side, however, bad pixels are becomingincreasingly rare. Mostpeople are reporting no bad pixels at all!
CALIBRATINGWhat needs to be calibrated on a plasma?
You needto calibrate most of the same things that need to be calibratedonother displays. About the only things that don't need to be doneareconvergence and geometry. You can usually tinker with picture sizeandposition, but there's no need to deal with keystone orpincushionadjustments, etc.What is white level? What is black level?How are they adjusted?
Theadjustment for white level is usuallylabeled "Picture" (as onPanasonics) or "Contrast". "Brightness", on theother hand, refers tothe black level. Yes, this is apallinglycounterintuitive. This FAQuses the terms "white level" and "blacklevel", since they betterdescribe what you're actually adjusting, andthey're the terms used byAvia and Video Essentials.
How do I adjust hue and saturation?
In anothermysterious choice of terms, hue is controlled by the "Tint"setting,and saturation is controlled by the "Color" setting. This FAQuses theterms "hue" and "saturation", since they're the terms used byAvia andVideo Essentials.
How do I set the white level on a plasma?
Youset the white level by adjusting the "Picture" setting. You willneedto use a different test pattern than you would for a CRT. Forbothplasma displays and LCD displays, you should use the 10 IREgrayscalestep pattern. There are two criteria you want to match on yourplasma.
First,you need to make sure the white level is low enoughthat your displayisn't thresholding (or clamping) bright levels. Youshould set thewhite level low enough that you can see each of the 10IRE stepsdistinctly. The Panasonics seem not to exhibit clamping (in mylimitedexperience), even at factory defaults, so this criterion may notbeterribly useful.
Second, for the health of your display ( avoid burn-in), you should turn down the white level. Just becauseyour display can display blindingly bright pictures doesn't mean that it should.Plasma displays should be set between 21 fl and 25 fl light output; thePanasonics comeout of the factory at about 30 fl. On one ISF-calibratedPanasonic, 23fl was roughly equivalent to a Picture setting of -20 (inthe usermenu, not the service menu). To set this precisely you'll needto bringin a calibration specialist, but you can do a lot of good byjustdialing down the white level a lot. After seeing the display at 30fl,23 fl will see very dim. But after a while, you'll find that 23 flisplenty bright.
How do I set the black level on a plasma?
Youset the black level by adjusting the "Brightness" setting. You canusethe same test pattern you would use for any other display.
How do I calibrate grayscale (calibrate the color temperature)?
Unfortunately,this is one you can't do yourself. You need specialequipment tomeasure the color. In fact, most ISF technicians lack theequipmentspecific to plasma calibration (a $15K gadget known asaspectroradiometer). But even the standard color measurementequipment(which calibrationists do have) will do a great job.
Thatsaid, one person who had his Panasonic display calibrated by anISFspecialist said that the Cinema / Warm setting was reasonably closeto6500K out of the box. Using that setting is probably the best you'lldoon your own.
If you're really determined to screw up yourdisplay,the RGB drive and cutoff settings in the service menu are usedto adjustthe color temperature.
How do I adjust the color decoder?
Thereareseveral issues here. Generally speaking, the Panasonic decoder seemstopush blue a bit. The R-Y Axis Angle and B-Y Axis Gain in theservicemenu are used to correct this behavior.
There used to beaproblem on some Panasonics with the Y/C delay on the S-video input.Seethe Quality Control section for more information.
How do I adjust the gamma?
On the industrialmodel, there is a set of Advanced picture settings. Goto the Picturemenu, turn Advanced on, and then hit the down-arrow. Inthe subsequentmenu you can adjust quite a few parameters, includingselect from a fewgamma settings.
This advanced menu appears to be missing from the consumer model.
How do I calibrate my consumer model given these missing menus?
Thereis apparently a way to activate these menus. Perhaps you can findacalibrationist or Panasonic technician would can turn them onlongenough to do the calibration.
What's the overall calibration procedure?
In general, the order Avia sets out is the correct one. A more complete list is:
  1. White level (picture)
  2. Black level (brightness)
  3. Repeat (1) and (2) until you have a good balance.
  4. Grayscale (requires special hardware and mucking about in the service menu)
  5. Sharpness
  6. Hue and Saturation (tint and color)
  7. Color decoder (requires use of the service menu)
  8. Repeat (6) and (7) for red and green until you have a good balance.
SERVICE MENU How do I access the service menu?
In a word, don't. See the service menu warningabove.If you're bound and determined to make use of the service menu,buy theservice manual. It contains more than enough information foryou to ruinyour display and/or kill yourself.

Posted on Aug 18, 2009

Re: Sony Plasma KDE-P42XS1 Television

We had the same problem discovered it was the TV bulb was going out. Thought the light would blink before that happened according to the book but found out it only blinks when it goes out completely. Buy the bulb and put it in yourself, it's easy and will save you at least $100.00

Posted on Feb 03, 2008

Add Your Answer

0 characters

Uploading: 0%


Complete. Click "Add" to insert your video. Add


3 Points

Related Questions:

1 Answer

Videocon TV PIP model 53

You have answered your own question--a broken or loose connection is your problem.

Most sets with a picture tube (old projection have 3) have a socket for the tubes which can develop bad connection.

Let me know the full model number off the rear of the set if possible.

Apr 03, 2012 | Projection Televisions

1 Answer

Six year old 53UDX10B - Faint Horizontal Lines in Picture

This is a pretty common fault here Mike. I cannot remember the capacitor number, but it is right off of the flyback transformer and supplies the screen voltage to the picture tube driver transistors. You will need to get a scematic and trace out and check the flyback secondary capacitors for leakage, I am sure you will have more then on or two capacitors that need to be replaced. One more thing with this TV set. Look right under where the picture tubes are on the printed circuit boards, for an indication of fluid leakage or an oily substance. If you see any evidence of this, turn off the TV set and unplug it and call out a tech to try and clean off these boards before any further damage happens. Good Luck

Jun 24, 2007 | Hitachi 53UDX10B 53" Rear Projection...

1 Answer

I have a 8 year old 57in Sony projection HDTV,when the picture is dark you can see faint blue lines in a curved arch like pattern across the screen.Any ideas? Thanks

The tv problems is call a convergence picture problems,it is just starting to developing.This problems when it is fully developing into a convergence picture problems to the tv eventually.Tv will develope into a colors lines R,G,B mis alignments,have a colors shadow pictures or into a picture 3D look alike.Eventually the tv convergence board will dies,have to have it parts replaced like 2 STK convergence ICS and some or all of it resistors too.This problems the tvs shops will cost u like $300-350 for parts and lobors.

Aug 13, 2011 | Sony KP-57WS500 57" Rear Projection...

1 Answer

My sony KDP-51WS550 tv has no picture, only sound, when i turn it on then shuts off and red light blinks 10 times . but by turning it off and on a few times the picture will come back on and stay through...


The problem is from the lamp of the television, it is about to develop a fault that is why the picture goes off but you have sound.

The 10 blinks you see on the led is a symbol that the television is having a fault that needs to be checked.

The solution is for you to open up the television and locate the lamp and replace it with a new one, once you replace the lamp, the television will be in good condition once again.

Take care and good luck

Oct 31, 2010 | Sony Projection Televisions

1 Answer

Rear proj TV picture keeps blinking out

comon sony problem Sony has and Ik circuit tha is suppose to not allow video in there is an uneven emission from the crts what you have on both sets the tube are getting so weak causing the circuit to kick in and out in other word you need crts inboth set and they are not avail new you can have them rebuild but the set will never look good again time to retire them

Dec 01, 2009 | Sony Grand WEGA KDF-50WE655 50" Rear...

1 Answer

Sony 52" rear projection tc

Hi, thats the code for AKB fault, this requires a tv tech to fix,, not a big bucks repair, video-tek

Feb 09, 2009 | Sony KP-43T90 43" Rear Projection...

2 Answers

Sony KP-51HW40

I had the same problem with mine 2 years ago (TV was 1.5 years old at that time) I had extended warranty on TV and it was fixed by Sony at no cost to me. Now yesterday I have another problem with it. All of a sudden screen went BLUE. No Sound either. It could be the CRT (That's what I read here) Out of luck this time. Will call local Repair shop (70 miles away) and see how much it will cost to fix it. Good luck.

May 31, 2007 | Sony KP-51HW40 51" Rear Projection...

1 Answer

Horizontal Lines in picture


Jan 12, 2007 | Mitsubishi VS-45607 45" Rear Projection...

Not finding what you are looking for?
Sony Grand WEGA KDF-55WF655 36" Rear Projection HDTV Logo

324 people viewed this question

Ask a Question

Usually answered in minutes!

Top Sony Projection Televisions Experts

Steve Sweetleaf
Steve Sweetleaf

Level 3 Expert

1128 Answers


Level 2 Expert

103 Answers

Jason Harris
Jason Harris

Level 2 Expert

256 Answers

Are you a Sony Projection Television Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides