Question about Sony Grand WEGA KDF-42WE655 42" Rear Projection HDTV
Looks to me as an serious (but not uncommon) PSP board problem with Sony plasmas. Contact a Sony service center.
What problems have people had with quality control on these displays? Are they covered under warranty?
You needto calibrate most of the same things that need to be calibrated onother displays. About the only things that don't need to be done areconvergence and geometry. You can usually tinker with picture size andposition, but there's no need to deal with keystone or pincushionadjustments, etc.What is white level? What is black level? How are they adjusted?
Theadjustment for white level is usually labeled "Picture" (as onPanasonics) or "Contrast". "Brightness", on the other hand, refers tothe black level. Yes, this is apallingly counter intuitive. This FAQuses the terms "white level" and "black level", since they betterdescribe what you're actually adjusting, and they're the terms used byAvia and Video Essentials.
How do I adjust hue and saturation?
In another mysterious choice of terms, hue is controlled by the "Tint" setting,and saturation is controlled by the "Color" setting. This FAQ uses theterms "hue" and "saturation", since they're the terms used by Avia andVideo Essentials.
How do I set the white level on a plasma?
Youset the white level by adjusting the "Picture" setting. You will needto use a different test pattern than you would for a CRT. For both plasma displays and LCD displays, you should use the 10 IRE grayscalestep pattern. There are two criteria you want to match on your plasma.
First,you need to make sure the white level is low enough that your displayisn't thresholding (or clamping) bright levels. You should set thewhite level low enough that you can see each of the 10 IRE stepsdistinctly. The Sony seem not to exhibit clamping (in my limitedexperience), even at factory defaults, so this criterion may not beterribly useful.
Second, for the health of your display (e.g.to 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; the Sony comeout of the factory at about 30 fl. On one ISF-calibrated Sony, 23fl was roughly equivalent to a Picture setting of -20 (in the usermenu, not the service menu). To set this precisely you'll need to bringin a calibration specialist, but you can do a lot of good by justdialing down the white level a lot. After seeing the display at 30 fl,23 fl will see very dim. But after a while, you'll find that 23 fl isplenty bright.
How do I set the black level on a plasma?
Youset the black level by adjusting the "Brightness" setting. You can usethe 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 special equipment tomeasure the color. In fact, most ISF technicians lack the equipmentspecific to plasma calibration (a $15K gadget known as aspectroradiometer). But even the standard color measurement equipment(which calibrationists do have) will do a great job.
Thatsaid, one person who had his Sony display calibrated by an ISF specialist said that the Cinema / Warm setting was reasonably close to6500K out of the box. Using that setting is probably the best you'll doon your own.
If you're really determined to screw up yourdisplay, the RGB drive and cutoff settings in the service menu are used to adjust the color temperature.
How do I adjust the color decoder?
There are several issues here. Generally speaking, the Panasonic decoder seems topush blue a bit. The R-Y Axis Angle and B-Y Axis Gain in the servicemenu are used to correct this behavior.
There used to be aproblem 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 industrial model, there is a set of Advanced picture settings. Go to the Picture menu, turn Advanced on, and then hit the down-arrow. In the subsequentmenu you can adjust quite a few parameters, including select 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 find acalibrationist or Panasonic technician would can turn them on longenough 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:
In a word, don't. See the service menu warningabove. If you're bound and determined to make use of the service menu,buy the service manual. It contains more than enough information foryou to ruin your display and/or kill yourself.
Posted on Aug 18, 2009
Tips for a great answer:
Oct 17, 2014 | Sony F-9308-750-0 Model XL-2400...
Dec 08, 2010 | Sony Grand WEGA KF60DX100 60" Rear...
Jan 19, 2010 | Televison & Video
Oct 30, 2009 | Sony Televison & Video
Oct 05, 2009 | Sony KDF-E50A10 50 in. LCD HDTV
Sep 05, 2009 | Sony Grand WEGA KDF-42WE655 42" Rear...
Jun 09, 2009 | Sony KDF-50E2000 50" HDTV
Jan 05, 2008 | Sony Grand WEGA KDF-60XS955 60" Rear...
Aug 13, 2007 | Sony KDF46E2000 46" Projection HDTV
885 people viewed this question
Usually answered in minutes!