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Discussion in 'Electronic Repair' started by Frank, May 18, 2007.

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  1. Frank

    Frank Guest

    Looking to replace our TV. With all that's out there now I am confused Plasma ? LCD? Projection? 750 or 1080 P
    Most of you hear this all the time sorry but help would be appreciated. would like 37 to 42" screen
    Ktech
     
  2. Charles

    Charles Guest

    Looking to replace our TV. With all that's out there now I am confused Plasma ? LCD? Projection? 750 or 1080 P
    Most of you hear this all the time sorry but help would be appreciated. would like 37 to 42" screen
    Ktech

    I like the LCDs. Go look at them at Best Buy, etc. The Samsungs seem nice for the money. Get the most resolution that you can afford and progressive scan.
     
  3. Ken

    Ken Guest

    http://www.hdtvinfoport.com/HDTV-Glossary.html
     
  4. Engineer

    Engineer Guest

    Not my field (I'm strictly audio), so others can correct me...
    For nominally same size TV:
    LCD cheaper than Plasma
    LCD lower power consumption than plasma
    Plasma brighter than LCD at the bright end
    Plasma shorter life than LCD
    I've forgotten which has the "best deep blacks"
    Hope this helps.
    I don't expect to buy a flat screen TV very soon as we've just
    inherited a newish CRT based 27 inch TV.
    Cheers,
    Roger
     
  5. lcd 250w constant draw of power due to back light plasma varies with
    brightness over all very close to the same in power use
    lcd better in bright rooms plasma for the rest
    Panels in both (panasonic) rated at 60,000 hours
    plasma contrast ratio 10000 to 1 lcd 5000 to 1 plasma produces better
    blacks
     
  6. What size?

    Under 32 inch LCD 1080p

    Over 32 inch Plasma 1080p
     
  7. Looking to replace our TV. With all that's out there now I am confused
    Plasma ? LCD? Projection? 750 or 1080 P
    Most of you hear this all the time sorry but help would be appreciated.
    would like 37 to 42" screen
    Ktech

    IMO, get a tube model or don't pay much and look at the warranty.
     
  8. Guest

    Hia Frank,
    I am a technical advisor, and have been a workshop (TV) engineer for
    over 30 years. The info you have already been given seems to be
    correct with regard to the power consuption etc. Plasma is better for
    dark/black detail, and better for fast action as you may get some
    delay artifacts on LCD. Lcd has a higher pixel count, thefore has
    finer detail but at the viewing distance required (about 10 - 15 foot)
    you probablt wont notice the difference. The best advice I can give
    you, is to go to a large store such as Comet, where they will have a
    lot of sets on display, and you can make your own judgment. The
    branded makes such as Panasonic, Toshiba, Sony, Sharp, Hitachi, philps
    etc are probably better than own branded makes, but that depends on
    how much you want to spend. I think Panasonic are probably the best
    for Plasma, and Toshiba or sharp are excellent LCD sets. One thing you
    must bear in mind that, when you get such a large display, you are
    blowing up (like a baloon) the same definition therefore the
    definition is not as good as a small set. These sets are crying out
    for HD (high definition). Ask the store to show you a set running in
    HD. I think you will be amazed! Bear in mind that the only source(s)
    of HD are a dedicated HD player such as Toshiba or Sony do, the former
    costs about £350 and has the HD DVD format. Blue ray is the other
    format, and has more film rights, hence most of the new films tend to
    me Blue Ray. Blue ray players are more expensive, but the new Sony
    Playstation 3, has a blue ray player built in. The film itself has to
    have been recorded in HD, but these players are backward compatable,
    and will play normal DVD's.
    They currently cost around £15 a film in HD. The other source of HD is
    Sky Plus, but please bear in mind that only a few channels transmit
    true HD. You should make sure you use an HDMI lead for HD. You can use
    component video or DVI, but these last two require seperate sound
    connections.

    Hope this helps

    Rod
     
  9. Jerry G.

    Jerry G. Guest

    Your advice is best I have seen sofar!

    One thing I would like to add, is that I found that rear screen
    projection sets are not that great. They look soft, and the replacement
    lamps don't always last very long, and are very expensive. A few people
    I know bought a rear screen LCD projection TV because they like the
    size. I found it to be a bit soft compared to a standard front view.
    They also learned the hard way that about every 6 to 8 months, they had
    to replace the projection lamp. This lamp is over $200 US! The TV is
    used every day for most of the day.

    As for LCD screens, I also found that with age, they do not drift in
    colour temperature. After about 60,000 hours the backplane lamp and its
    power supply may burn out. But, after that many hours, I would be
    looking at replacing the set rather than servicing it. There are many
    other types of components that can die in a TV or monitor after many
    hours of use.


    --

    Jerry G.


    Hia Frank,
    I am a technical advisor, and have been a workshop (TV) engineer for
    over 30 years. The info you have already been given seems to be
    correct with regard to the power consuption etc. Plasma is better for
    dark/black detail, and better for fast action as you may get some
    delay artifacts on LCD. Lcd has a higher pixel count, thefore has
    finer detail but at the viewing distance required (about 10 - 15 foot)
    you probablt wont notice the difference. The best advice I can give
    you, is to go to a large store such as Comet, where they will have a
    lot of sets on display, and you can make your own judgment. The
    branded makes such as Panasonic, Toshiba, Sony, Sharp, Hitachi, philps
    etc are probably better than own branded makes, but that depends on
    how much you want to spend. I think Panasonic are probably the best
    for Plasma, and Toshiba or sharp are excellent LCD sets. One thing you
    must bear in mind that, when you get such a large display, you are
    blowing up (like a baloon) the same definition therefore the
    definition is not as good as a small set. These sets are crying out
    for HD (high definition). Ask the store to show you a set running in
    HD. I think you will be amazed! Bear in mind that the only source(s)
    of HD are a dedicated HD player such as Toshiba or Sony do, the former
    costs about £350 and has the HD DVD format. Blue ray is the other
    format, and has more film rights, hence most of the new films tend to
    me Blue Ray. Blue ray players are more expensive, but the new Sony
    Playstation 3, has a blue ray player built in. The film itself has to
    have been recorded in HD, but these players are backward compatable,
    and will play normal DVD's.
    They currently cost around £15 a film in HD. The other source of HD is
    Sky Plus, but please bear in mind that only a few channels transmit
    true HD. You should make sure you use an HDMI lead for HD. You can use
    component video or DVI, but these last two require seperate sound
    connections.

    Hope this helps

    Rod
     
  10. Guest

    hia Jerry,
    what you say about projection tv is quite right, thats why I didn't
    recommend them, that also is true of DLP sets. While Plasma sets give
    a higher light output (being an active light source, as against LCD)
    LCD are getting better, I recently looked at a plasma and lcd side by
    side, and to be honest, I could not see any difference, but this was
    not a critical anaysis, more from just watching them as a customer
    would. I would advise taking out extended warranty on both plasma and
    LCD, especially the large sizes, as if the display panel fails, they
    are VERY espensive to replace!

    Regards

    Rod
     
  11. b

    b Guest

    ha escrito:
    .. I would advise taking out extended warranty on both plasma and
    correct.

    The following is from today, opied from a thread on another forum:

    i was shocked this week when a toshiba 32wl56p came in for repair it
    didnt take long to diagnose the fault to the inverter pcb having
    failed
    so as usual next action was contact toshiba for price couldnt believe
    it when they told me the sharp manufactured inverter/lcd panel was
    only available as a complete assy at a cost of about £500 plus vat
    this has also happened with other manufacturers ie daewoo philips and
    a few others i think its outrageous that a £50-100 inverter fault
    means having to purchase the whole screen however i typed the inverter
    part number into google and to my surprise found a company in the
    states (INVERTERCENTRAL.COM)that supplies the inverter it is one of
    there most popular ones the whole price inc shipping is $99 which
    saved a perfectly good tv although its a crappy lcd from landfill
    http://www.invertercentral.com/
    __________________



    Default Re: lcd inverter failure
    thats very usefull to know, i have a fiew large lcd monitors with
    failed or faining inverters i'll give them a go.

    Jay
    __________________
    The light at the end of the tunnel is probably the headlight of an
    oncoming train
    j


    Default Re: lcd inverter failure
    I had the inverter fail on my Acer 17" LCD monitor model AL1711,
    identical inside to the 15" version AL1511. I managed to open it up
    and found four electrolytics with slightly bulging tops, these were
    mounted on the pcb such that the heat from a heatsink rose straight
    into them. I changed all four caps and the monitor is now working
    well. Worth a check on any monitor really, change those caps with
    slightly convex tops! I used 105 deg.C jobs as replacement.
    Les
    __________________

    Hi RBM
    Many thanks for that. I suppose their theory is that a faulty
    backlight tube will damage the inverter. This can be the case in
    smaller sets for some reason, but I've yet to find this in large-
    screen LCDs.
    Mind you, £500 is a good price for a screen - Panasonic and Philips
    are around £1000 for a 32" - and that doesn't include the inverter
    PCB!



    Default Re: lcd inverter failure
    Quote:
    Originally Posted by Welsh Anorak View Post
    Mind you, £500 is a good price for a screen - Panasonic and Philips
    are around £1000 for a 32" - and that doesn't include the inverter
    PCB!
    It will not be worth repairing anything soon, John Lewis were selling
    Panasonic 37" LCD TVs for about £850 last week with 5 years guarantee,
    which makes £1000 for a spare part seem a trifle uneconomic.

    J

    Default Re: lcd inverter failure
    Quote:
    Originally Posted by jcaines View Post
    It will not be worth repairing anything soon, John Lewis were selling
    Panasonic 37" LCD TVs for about £850 last week with 5 years guarantee,
    which makes £1000 for a spare part seem a trifle uneconomic.

    John
    The only problem with these extended warranties is that if the repair
    is considered uneconomical or if parts are NLA then the set is written
    off and the insurers pay a fraction of a new set.
     
  12. Frank

    Frank Guest

    You Guys are great . Much good info regarding replacement TV.
    Friend told me that LG is considered a good product . Your feelings ?
    Man buying a new TV is as much a Pain------- as buying a car.
    Ktech
     
  13. Pretty good. Don't buy 'old' brand names like RCA, Philips - or Singer! No
    name brands are better than those.
     
  14. James Sweet

    James Sweet Guest


    Well those *are* no name brands, with well known names slapped on the front.
    They do tend to be the bottom of the barrel though.
     
  15. My theory is that if the sets are really bad they use a rent-a-name to make
    them look better than they are. If they're OK they sell on their own without
    the label.
     
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