Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems.

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Ziggie
 
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Default New HD TV, what to buy

What should I buy if I want to buy today, in 50 to 60 inch HD, DLP or LCD?
How come Plasmas draw so much power, like 400 to 500 W?

Ziggie


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JANA
 
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Default New HD TV, what to buy

You should buy a size according to your needs. Any new set purchased should
be an HDTV type. I myself don't like the DLP, or any type of rear screen
technology. They just don't have the performance of the direct view. If you
compare the sharpness and illumination between the rear screen and direct
view, there is a very big difference. There is also a difference in the
price. You get what you pay for.

Basically, for me, it is between the LCD or the Plasma. The Plasma is best
in a dark room, and the LCD is best in a lit room. The Plasma will have a
higher contrast ratio than the LCD, and it looks more like a CRT type
picture. The Plasma has less chances of defective lit pixels. The black
levels in the video will have less shading errors in the Plasma. They are
both very good technologies. If a still image is left on the Plasma screen
for a very long time, it can burn in. LCD screens can have what may be
referred to as a sticking effect, but this would take a long time of no
image movement to accomplish.

The Plasma draws more power, because it is a complex type of tube
technology, and it requires a large power supply to operate. The tube and
its addressing system uses a lot of current. The LCD only uses a backlight
system for its illumination. The LCD panel itself uses MosFet technology
internally to drive the liquid crystal medium. MosFets use low current, and
low voltage to be driven.


--

JANA
_____


"Ziggie" wrote in message
news:JMdgf.120974$S4.18302@edtnps84...
What should I buy if I want to buy today, in 50 to 60 inch HD, DLP or LCD?
How come Plasmas draw so much power, like 400 to 500 W?

Ziggie



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ampdoc
 
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Default New HD TV, what to buy

Another thing to consider is cost of ownership. A Plasma is a very
complicated set, repairs are not cheap. If a panel defect occurs, such as
failure of the address bus to fully remove charge from addressed cells, the
panel is basically gone. I have worked on an older model set, only 5 years
old, with a panel failure. As the set heated, cells would stay illuminated
making a terrible looking Picture. Replacing the panel is out of the
question due to cost. Technology has improved, but these sets have not had
the market time CRT sets have, so we really do not know what normal panel
life expectancy is in REAL household use. They are also prone to phosphor
burn, Still images are very bad on these sets.
As to DLP, LCD and DILA (JVC's LCD technology)
All of these are good options, personally I like the LCD, as the DLP to me
does not seem as good at reproducing fast motion. The cost of ownership of
these sets can be high, as lamp life may be 3000 to 6000 hours, depending on
manufacturer, and lamps may cost $250.00 or more. So basically during the
average 5 years you could spend $1500.00 on lamps depending on your usage
habits, manufacturing tolerances, direction of the wind blowing off the
antarctic, you get the idea. :-)

--
Jammy Harbin

"JANA" wrote in message
...
You should buy a size according to your needs. Any new set purchased
should
be an HDTV type. I myself don't like the DLP, or any type of rear screen
technology. They just don't have the performance of the direct view. If
you
compare the sharpness and illumination between the rear screen and direct
view, there is a very big difference. There is also a difference in the
price. You get what you pay for.

Basically, for me, it is between the LCD or the Plasma. The Plasma is best
in a dark room, and the LCD is best in a lit room. The Plasma will have a
higher contrast ratio than the LCD, and it looks more like a CRT type
picture. The Plasma has less chances of defective lit pixels. The black
levels in the video will have less shading errors in the Plasma. They are
both very good technologies. If a still image is left on the Plasma screen
for a very long time, it can burn in. LCD screens can have what may be
referred to as a sticking effect, but this would take a long time of no
image movement to accomplish.

The Plasma draws more power, because it is a complex type of tube
technology, and it requires a large power supply to operate. The tube and
its addressing system uses a lot of current. The LCD only uses a backlight
system for its illumination. The LCD panel itself uses MosFet technology
internally to drive the liquid crystal medium. MosFets use low current,
and
low voltage to be driven.


--

JANA
_____


"Ziggie" wrote in message
news:JMdgf.120974$S4.18302@edtnps84...
What should I buy if I want to buy today, in 50 to 60 inch HD, DLP or LCD?
How come Plasmas draw so much power, like 400 to 500 W?

Ziggie





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Charles Schuler
 
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Default New HD TV, what to buy


"Ziggie" wrote in message
news:JMdgf.120974$S4.18302@edtnps84...
What should I buy if I want to buy today, in 50 to 60 inch HD, DLP or LCD?
How come Plasmas draw so much power, like 400 to 500 W?


I'd say wait a while. HDTV is one of the most unstable market categories
that I have ever seen. No matter what you buy, it will quickly become a bad
choice. Just my two cents.


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**THE-RFI-EMI-GUY**
 
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Default New HD TV, what to buy

According to recent House/Senate activity, it could be April 2009!!
before the HDTV cutoff takes effect. So buying an HDTV this far in
advance has got to be a risky undertaking. Unfortunately like most
people my NTSC sets are getting pretty old and I am getting pressure
from the family to buy "a big screen TV". No way I am going to buy a
rear projection monster either!

Charles Schuler wrote:

"Ziggie" wrote in message
news:JMdgf.120974$S4.18302@edtnps84...


What should I buy if I want to buy today, in 50 to 60 inch HD, DLP or LCD?
How come Plasmas draw so much power, like 400 to 500 W?



I'd say wait a while. HDTV is one of the most unstable market categories
that I have ever seen. No matter what you buy, it will quickly become a bad
choice. Just my two cents.





--
Joe Leikhim K4SAT
"The RFI-EMI-GUY"

"Follow The Money"


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James Sweet
 
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Default New HD TV, what to buy

ampdoc wrote:
Another thing to consider is cost of ownership. A Plasma is a very
complicated set, repairs are not cheap. If a panel defect occurs, such as
failure of the address bus to fully remove charge from addressed cells, the
panel is basically gone. I have worked on an older model set, only 5 years
old, with a panel failure. As the set heated, cells would stay illuminated
making a terrible looking Picture. Replacing the panel is out of the
question due to cost. Technology has improved, but these sets have not had
the market time CRT sets have, so we really do not know what normal panel
life expectancy is in REAL household use. They are also prone to phosphor
burn, Still images are very bad on these sets.



Plasma does indeed look very good when setup right, but as you say the
reliability is just not there to an extent that I'd plunk down several
$K for one. I've encountered several dead ones where chips had blown
which were bonded to the panel, and quite a few more with phosphor burn,
one of them was left on for only about an hour with a paused video game
and had annoying and permanent burn.
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James Sweet
 
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Default New HD TV, what to buy

**THE-RFI-EMI-GUY** wrote:
According to recent House/Senate activity, it could be April 2009!!
before the HDTV cutoff takes effect. So buying an HDTV this far in
advance has got to be a risky undertaking. Unfortunately like most
people my NTSC sets are getting pretty old and I am getting pressure
from the family to buy "a big screen TV". No way I am going to buy a
rear projection monster either!



Rear projection NTSC sets are a dime a dozen, I've picked up 6 of them
for free, fixing them and trading up until I got a pretty nice one.
Browsed craigslist today and there were at least 5 free ones up for
grabs, most with minor problems.
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Sarah
 
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Default New HD TV, what to buy


Plasma does indeed look very good when setup right, but as you say the
reliability is just not there to an extent that I'd plunk down several
$K for one. I've encountered several dead ones where chips had blown
which were bonded to the panel, and quite a few more with phosphor burn,
one of them was left on for only about an hour with a paused video game
and had annoying and permanent burn.


Yes, they also use quite a bit of power, 450+ watts..... compared to
perhaps 85 for an LCD screen.

CRT hdtv's are still pretty nice & often come with three hdtv tuners.
Slim crt tvs don't seem worth paying $300 to save 6 inches of space.
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Dave Plowman (News)
 
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Default New HD TV, what to buy

In article ,
JANA wrote:
You should buy a size according to your needs. Any new set purchased
should be an HDTV type. I myself don't like the DLP, or any type of
rear screen technology. They just don't have the performance of the
direct view. If you compare the sharpness and illumination between the
rear screen and direct view, there is a very big difference. There is
also a difference in the price. You get what you pay for.


I've got a DLP rear projector. Sitting down, the angle of view is
perfectly adequate for a family - after all with a 50" screen you don't
have to sit on top of it. Stand up and you go off axis, though, but surely
TV is watched sitting down?

As regards resolution, it's far better than any domestic CRT set - genuine
HD ready. Illumination on full power is also higher on axis - in fact I'm
using the low power lamp setting and have reduced the contrast from
default.

Its main fault is the lack of a true black in low key scenes - everything
looks slightly sat up. However, you don't get a true black in the cinema
either.

There are some movement artifacts sometimes. More obvious to some than
others. Later 3 chip DLP technology should help this.

These things are personal, but I far prefer it to any Plasma I've seen.

Of course a CRT to an equivalent spec would be better - but such a thing
doesn't exist and would need a crane to install if it did.

--
*OK, who stopped payment on my reality check?

Dave Plowman London SW
To e-mail, change noise into sound.
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Charles Schuler
 
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Default New HD TV, what to buy



Rear projection NTSC sets are a dime a dozen, I've picked up 6 of them for
free, fixing them and trading up until I got a pretty nice one. Browsed
craigslist today and there were at least 5 free ones up for grabs, most
with minor problems.


The plasma sets are impressive; but to view what? HDTV will only take off
when there is sufficient and significant viewing material to warrant owning
one. I am not a sports fan, by the way.

As to movies; they can't even get the sound right these days!




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James Sweet
 
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Default New HD TV, what to buy

RonKZ650 wrote:
All HDTV is pure garbage. What is the reason we are switching to this
crap mandated by the government anyway. I assume to get rid of the
extra $$$ people save up every few years when they need to be repaired
and all parts are special order and NLA. Wonderful idea.
Ziggie wrote:



Broadcast HD is worthless IMO, but having seen DVD movies on it, it
looks truly fantastic. I'm looking forward to the day when I can pick up
a dead HD bigscreen for free, I'm guessing it'll happen within the next
couple years, for now NTSC is good enough for what I've paid for it,
which is nothing.
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Glenn
 
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Default New HD TV, what to buy

Hi
Iam looking for a used LSB (power supply board) for a
Phillips/Magnavox RPT 60" mod 9P6034C102 chassis PTV835
board # 00APD026C003
There are several models compatible.
You mentioned craigslist. Can I browse that site?
Thanks


On Tue, 22 Nov 2005 22:32:59 -0500, "Charles Schuler"
wrote:



Rear projection NTSC sets are a dime a dozen, I've picked up 6 of them for
free, fixing them and trading up until I got a pretty nice one. Browsed
craigslist today and there were at least 5 free ones up for grabs, most
with minor problems.


The plasma sets are impressive; but to view what? HDTV will only take off
when there is sufficient and significant viewing material to warrant owning
one. I am not a sports fan, by the way.

As to movies; they can't even get the sound right these days!


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