Question about Akai PDP42Z5TA 42 in. Plasma Television

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Spots manual says check to see there is no emitter sources (car, HV cable or nEON lamp) or other possible interference sources. what does this mean?

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Hi,

If I may add to the postings of devocap and coolguy008 (and with their indulgence) in your other posting.

Often, HV would refer to high voltage cables. These are ordinary wires but with extremely thick insulation. Some later day versions uses highly conductive carbon inserts instead of wire to reduce electrical noise emissions. They are used where the voltages transmitted are considerably higher than normally used. Examples are:
1. Sparkplug wires
2. Power leads to neon light advertisements
3. wire from the flyback transformer to anode cap in picture tubes.

Possible sources of electrical noise (that uses HV cables)
a. 2 stroke engines such as those in some lawn mowers, chainsaws, old models of snowmobiles, outboard engines, dirt bikes;
b. neon signs such as those in cafes, clubs, hotels, public places.

Hope that this be of additional help/idea other than those posted by devocap and coolguy008.

Good luck and kind regards.

Posted on Feb 02, 2008

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Plasma TV


Hi and welcome to FixYa,

To get a good signal on all TV units, the source must be good and strong. The source could be an aerial antenna or connection to your local cable provider. The message "No Signal" indicates that the TV cold not receive a decent TV signal. With this in mind, possible solution wouold then be to increase/improve the incoming TV signal:
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  • if you are hooked to a cable provider then it may be to your advantage to bring this concern to their attention. They could try transferring you tap off point to a better distribution box, replace your coaxial cable with low loss or even in some cases, install an inline booster;
  • possible RFI (radio frequency interference) which could come from wireless phones, garage door openers, WiFi, electronic dimmers, electronic ballasts of high density lamps and others. If any are present or within the immediate vicinity, pls try to relocate or reposition.
Just a start, do postback how things turned up or should you need additional information. Good luck and Thank you for using FixYa.

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What is an hv cable?


It's a 5 wire cable that transmits HD signals from your HD components to your HD TV... unlike the 3 wire ones you use to connect VCRs and DVD to TVs... they permit a faster signal speed and allow for a higher bandwidth ! HV may mean HI VOLTAGE witch can cause electro magnetic interference with your tv. When an ac current passes through a cord a magnetic field opens and closes along the cord and sometimes unwanted RF can leak in to your devices via this magnetic field.They are not too expensive..

Goodluck,
Don't forget to arte me as fixya..

Feb 01, 2008 | Akai PDP42Z5TA 42 in. Plasma Television

1 Answer

No picture Just Sound


Hi
There are different possibilities in your case¸but what happened to me ...
The LCD Backligh is out , I mean the bulbs or neons of the screen BACKLIGH, you have to check either the lights itself or the driver circuit which supply the HV to operate it, usually its a separate small long PCB beside the TV main board .
You can try this trick , Keep all lights off in the room and bring a table lamp, preferred a white neon one and face it lighted on the top of the screen with the TV on , try watch a very dark but exact picture with the sound you are hearing. This is a way to be sure that it is LCD backlights problem when using an external light to illuminate the screen .
It worked for me ,Good luck

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1 Answer

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Hello,

 

Picture quality problems (such as lines, fuzzy image, or wrong colors)

  1. Check the cables and connections: Make sure that cable connections are securely fastened to the connectors and try reaseating the connectors. If connecting a device using component cables, make sure all three color-coded cables are connected correctly into the corresponding connectors. Check the condition and length of the cables. Cables that are longer than 3 meters (10 feet), become more susceptible to promoting signal degredation (small dots "sparkling" on the screen and image ghosting). Cables that have been bent or pinched may also cause picture quality problems. Replace the cable or try a different cable type.
  2. Check the  display issue with  a different channel. Picture quality problems on a single channel or on all channels may be caused by the TV station signal (antenna) or the cable signal source.
  3. Make sure that the image quality issue is not coming from your source signal. For example: if the image quality issues occur while viewing TV , switch the source to a DVD player to see if the image quality problems go away. If selecting a different input source (using the remote control) causes the problem to go away, troubleshoot the source device causing the problem - adjust aerial antennas, call the cable company for assistance, and . If a picture quality problem occurs on all sources, the TV or its settings may be the cause of the problem. NOTE: Higher resolution TVs will make it much easier to view signal problems coming from source signals - especially TV signals. For example, if your TV cable company experiences heavy load on their system, you may be able to detect small miscolored squares that briefly scatter across the screen (macro-blocking). On a smaller standard TV, this type of quality problem is much less noticeable on a standard TV, but can become very annoying when viewed with greater detail.
  4. Try to Reset the TV ( LCD) quality options. Please look in to User Guide to make the TV to factory Defaults..
  5. Unplug the TV from its power source. With the power cord unplugged, press and hold the power button for five seconds. Turn on the TV . If the image quality problems still exists across all types of signal sources, the TV should be serviced.

I hope that this should resolve the issue. However, if the issue still persists then please contact LCD manufacturer for further more on the issue.

 

Bye.

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