The basic idea of plasma display is to illuminate a colored gas substance to form an image. What you see on the screen is burning gas between two pieces of glass. The gas substance is called neon or xenon. Average estimates for the screen to last is 40,000 to 60,000 hours. The plasma screen (PDP) contains a complex structure which has millions and millions of colored pixels. Each pixel is powered by tiny electrodes and has its own gas and color .You all know the daylight fluorescent bulbs you use in your house .Just imaging millions of them inside in your plasma screen. Each one controlled by brightness and color . That is what your plasma screen is.
PLASMA COMMON PROBLEMS
Broken Screen
Usually plasma TV problems start with the screen. If the plasma screen is broken or crashed, it's not repairable any more . It needs a new plasma screen replacement, which may cost you more then the plasma TV itself. ( new screen run ..2 -3k in real life .) Budget management !!! Protection front screen (glass on front) can be easily replaced and not so expensive as PDP panel behind it. If you have just protection screen damage your screen(PDP panel) will work without any problem . Plasma screen contains - aluminum base and two pieces of glass with gas between them ( gas inside not rechargeable ). Pixels with gas , controlled by small electrodes . Each pixel contains 3 colored sub pixels : they are green, blue and red. Plasma screen works in 2 steps:
gas ignition picture development
IGNITION- power supply >logic control > Z or X sustain,> screen PICTURE DEVELOPMENT - power supply>,video control board or scaler > ,logic control board>y sustain > x sustain > buffer boards >screen
Common problems with plasma panels - electrodes damage inside, change gas parameters, drivers on ribbon connectors damage.
TYPICAL BAD PLASMA SCREEN SYMTOMS:
1 Flashing red dots or pixels on the screen when it is cold (after warm up it goes away ) - bad screen 2 distorted colors on part of the screen - LEFT OR RIGHT CORNER -BAD SCREEN 3 COLORED VERTICAL LINES ON PICTURE 4 flashing red dots on some part of the screen
90% SCREEN PROBLEMS - NOT REPAIRABLE 10% ON PANELS 42V6 AND 42V5 (YOU HAVE a CHANCE)
BURN-IN-IMAGE
This is an Image you can see on top of the normal picture. It's usually displayed as dark lines or a dark area on the screen. Burn-in image developers: TV in-service in airports, libraries, restaurants, hotels, security networks, bars, all public places. If your plasma TV displays an image that's not moving (static image) for a long time, it will develop burn-in spots. This issue is not repairable and you will need a new screen (PDP panel) . That's why for all those restaurants, bars, and public places, it's better if you use an LCD type TV, not a plasma. For example, a Panasonic plasma TV was in a King County bar for 6 months on a sport channel and it developed a burn-in sport channel image. The estimated cost for this type of problem would be $2,500.00. Be smart and save your money.
Vertical or horizontal lines or bars - 2-3" wide
here is 60% of chance you will need a new screen. The problem you may have is dead driver (part of a screen) or poor connection between plasma glass and ribbon wire connector. There is some solution for it but not for long time. PDP panel and address driver on it not separated. If one of 26-40 drivers is going out, you need new screen. It is a real question why manufacturers don't separate expensive PDP panel ($2000 and more) and $40 driver IC on it. It is easier to replace a small $40 part than the entire screen. So far they just ignore this issue. Future plasma panel will be aluminum + glass + gas only.( no more drivers on it ) Other common problem with lines on screen -- buffer boards , high ammount of failure for these boards due to poor electronic design 1. voltage needed to operate controllers on buffer board just to high for small SMD IC 2. they are not strong enough to drive address electrode). In future it will be changed for more reliable parts .
PLASMA TV FAILURE SYMTOM
DEFECTIVE POWER SUPPLY BOARD OR STANDBYE POWER BOARD
1. no power 2. hard to turn on 3. no power light on front panel 4 .turn on after 20 min 5. turn on and immediately shots down 6 .flashing pixels on screen 7. turn on but no video and sound
X or Y or Z Sustain Board
1.Negative image 2.TV turns on and shots down in 2 sec. 3.Flashing pixels on screen 4.Dark image 5.Has sound but no video 6.Screen goes black and then return to normal picture 7.Vertical color lines on screen no video 8.Vertical color lines with video 9. Vertical bars on screen 10.Horizontal lines on the image 11.Picture goes red after while
LOGIC CONTROL BOARD
1. Just left part of screen working 2. Just right part of the screen is working 3.Vertical and horizontal lines on screen 4.Part of screen not working 5.Some functions not working 6.No video but has sound 7.Functions not working at all
Buffer Board
1 Turns on and shots down no video ,no sound . 2. Part of screen not working 3. Black vertical bars on screen 4.Smell burn 5. Changing in size vertical colored lines 6. Horizontal lines white or colored
Audio Video Main Board
1. No video from one of the inputs 2. No sound 3. No video but has menu lettering on screen 4.Some channels not working properly 5.Just '' snow '' on screen 6.No video but has a gray colored screen 7.Wan't to turn off 8. picture distorted after while 9.Intermittent sound 10.Wan't bring the menu on screen 11.Shots down for no reason
Panel Board
1.Dark image on part of the screen 2. Burn in image 3. Static image from previous seen channel or show clears in few minutes 4.Turn on and shots down 5. Flashing red dots when it is cold (PDP) 6.Intermittent change of colors or brightness
Plasma TV contains a few dangerous voltages that can electricute you in seconds . v s = 203 volts,v a =173 volts, Don't feel like you can walk on the water , better pass it to experience technicians, there is no parts inside need your attention and no parts easy to replace.
Plasma TV contains a few dangerous voltages that can electricute you in seconds . v s = 203 volts,v a =173 volts, Don't feel like you can walk on the water , better pass it to experience technicians, there is no parts inside need your attention and no parts easy to replace.
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