Toshiba TV29C90 problem; Image fades to black...

See if this works..
http://home.twcny.rr.com/littleblackdogs/D460Z.pdf
Buster

On Wed, 22 Dec 2004 00:00:05 -0000, James Horn <jimhorn@svn.net>
wrote:

Buster - would you have access to the D-460 camera drawings? Many
thanks!!

Jim Horn
Click to expand...
 
On 21 Dec 2004 20:03:40 -0800, newsgroups@erickotz.com wrote:
Today I accquired an HP LaserJet 4MV which appears to have some issues.
Click to expand...
comp.periphs.printers
comp.sys.hp.hardware

Jonesy
--
| Marvin L Jones | jonz | W3DHJ | linux
| Gunnison, Colorado | @ | Jonesy | OS/2 __
| 7,703' -- 2,345m | config.com | DM68mn SK
 
The downloaded file is corrupt. I tried twice.

"Buster" <nobody@nowhere.com> wrote in message
news:b2qhs0p3thm27kur2m5qblmi7rn7hp3ue2@4ax.com...
See if this works..
http://home.twcny.rr.com/littleblackdogs/D460Z.pdf
Buster

On Wed, 22 Dec 2004 00:00:05 -0000, James Horn <jimhorn@svn.net
wrote:

Buster - would you have access to the D-460 camera drawings? Many
thanks!!

Jim Horn
Click to expand...
 
yeah, the only types of displays used in the car stereos that i have seen
are lcd with backlight bulb (most common),lcd with indiglo type display
(rare cause its not very bright, ive only seen a few like it), and the
sealed glass with flourescent priniting in it display (on many factory car
stereos but not that many aftermarket ones) and of course there is that
led display block but thats almost a thing of the past now (we have
washing machines that now have plasma screen displays with animations, god
talk about overkill!)
 
"Ignoramus29457" <ignoramus29457@NOSPAM.29457.invalid> wrote in message
news:cq9vi9$45k$0@pita.alt.net...
I am confused about something. Even if a power plant requires external
power to start (say, fuel pumps should be operating for some time
before water heats up and boils), it would require a lot less power
than it produces. Probably many many times less. If so, then a power
plant can buy a generator of adequate size, say 1000 kW. It should
cost a relatively minuscule amount compared to the cost of the power
plant itself.

This is completely analogous to having an electric starter on an
engine. A small, cheap piece that can get stuff moving before the main
power plant starts up in a self sustained mode.

So, just what is the problem?Have them buy adequate generators and
that's all.
Click to expand...
Once a plant has started up, it certainly does produce more electricity than
it uses. A lot more. One plant I've worked at has a gross output of 880MW
electric. The 'hotel load' (the power needed to run the plant at full
power) is app. 30MW. So the net is 850MW.

But to start up, it needs about 15 - 20MW. And the main turbine is
producing zilch. Can you imagine how many diesel generator sets that would
take? A nice EMD V-16 can produce about 4MW. So, get about 5 or 6 of
those, connect them together with the correct switch-gear and controls and
have at it. But you will need this setup about once every 20 years, when a
major blackout such as 8/14/2003 occurs. That's a lot of hardware and
preventative maintenance for something you only need every 20 years. And 5
or 6 EMD V-16's with 4160V 4000kW output are not 'small, cheap pieces'.

So quite a lot of plants are not 'black startup' capable. The local grid
has to be 'up' to supply them with power to enable them to startup. Once
they *do* get on-line, it's a different story. But getting there is where
they need external power.

Take that nice diesel gen set you recently got. It's output is something
like 10kW right? And it just needs a nice 12V battery and electric starter
to get going. That's certainly affordable as opposed to a pull-rope. But
now imagine it scaled up by a factor of 100 000 so that you have a 1000MW
plant. In such a case even the 'cheap pieces' to start it would be very
expensive.

Some types of plants are much more easily made black start capable than
others. Hydro is perhaps the easiest. But even they need some
standby/emergency power for lubrication, gate-controls, cooling and such.
Modern gas turbines are probably also pretty easy to black-start. Steam
plants are some of the most demanding since they require a lot of pumping
power for the feed-water, and the boilers need quite a bit of auxilaries.

Then of course since most plants were built in the era of monopolistic
utilities with state regulation, you have to justify your plant's cost to
the regulators. The public service commission acknowledges that not *all*
the plants in a region need to be black start capable. They would not allow
such an 'extravagance' to be past on to the rate payers.

daestrom
 
I would try using a heat gun and freeze spray to provoke the fault.
Start with the electrolytic caps in the power supply and HV generator.

I have never worked on this model of scope, so I cannot tell you
specifics. But, your problem seems to be thermo, thus in theory, it
should be able to be found with the technique of heating and cooling.
Jerry G.
======
 
In alt.comp.periphs.dcameras Buster <nobody@nowhere.com> wrote:
See if this works..
http://home.twcny.rr.com/littleblackdogs/D460Z.pdf
Buster
Click to expand...
*** THANK YOU - THANK YOU ***

And a fine Christmas and New Year to you, Buster - and to Fred for
starting this discussion - and the rest of the group participants.

Thank you!

Jim Horn
 
you should find the power relay and short it to see if it comes on every
time, if so just replace the relay or put a manual switch on the set,
since it has a remote another possibility is low voltage in the standby
circut not feeding the relay much current so it wont grab every time
(check voltage on the coil side of the relay and standby transformer)
 
"Zephy" <zephinilium@yahoo.com> wrote in message
news:1103749128.181342.269010@z14g2000cwz.googlegroups.com...
| Help! I have an old video sculpture I built in 1995. It has three 9" B
| & W monitors. They were originally obtained via mail order from Herbach
| & Radman - they're just a circuit board and a CRT - it takes composite
| input, operates at 12V.
|
| Well, I just sold this sculpture to someone, and need to get it working
| properly again. I tested the 3 monitors; two are good but one of them
| will not hold a stable picture: no matter how carefully I adjust
| Horizontal hold, Vertical Hold (and V. LIN.) it rolls and shudders side
| to side, changes vertical rate (I think), won't lock in.

What are you using to generate the signals?

N
 
What am I using to generate the video signal? Just an ordinary VCR.
Again, two of the monitors work fine, two have this unstable picture.
- Z
 
"Zephy" <zephinilium@yahoo.com> wrote in message
news:1103782186.126098.68770@c13g2000cwb.googlegroups.com...
| What am I using to generate the video signal? Just an ordinary VCR.
| Again, two of the monitors work fine, two have this unstable picture.
| - Z

Well, if two work and two don't it's pretty sure it's the monitors.
Unfortunately at this point you really need someone with smarts and the
right equipment. I'd start with a scope on the vertical system and see what
the sync system is doing.

Be aware there's no short, simple solution for all cases. It's a matter of
working your way through the system until you find and replace as many parts
as are bad. That's why you have to train for 5 years to be qualified to fix
this stuff. TVs and monitors are complex devices.

N
 
On Wed, 22 Dec 2004 17:23:52 -0500, "AshTray700" <ashtray700@aol.com>
wrote:

you should find the power relay and short it to see if it comes on every
time, if so just replace the relay or put a manual switch on the set,
since it has a remote another possibility is low voltage in the standby
circut not feeding the relay much current so it wont grab every time
(check voltage on the coil side of the relay and standby transformer)
Click to expand...
Thanks so much, that is sort of what I was thinking it could be.
now I just need to find the relay, but I have some direction. I can
probably follow the power cord to that.

I appreciate the help
Phil
 
On 22 Dec 2004 22:09:46 -0800, "Zephy" <zephinilium@yahoo.com> put
finger to keyboard and composed:

What am I using to generate the video signal? Just an ordinary VCR.
Again, two of the monitors work fine, two have this unstable picture.
- Z
Click to expand...
Does the monitor sync with a DVD source? If it does, then I would
suspect some kind of flagwaving issue. This usually shows up as
horizontal jitters at the top of the screen. The TDA1180P IC has a
Time Constant Switch pin (12) and a Coincidence Detector pin (11)
which can be forced to accommodate VCR sources.

From the datasheet:
http://www.ortodoxism.ro/datasheets/stmicroelectronics/1191.pdf

"To optimize the behaviour of the IC if a video recorder is used, the
state of the [coincidence] detector can be forced by connecting Pin 11
to earth or to + VS."


- Franc Zabkar
--
Please remove one 's' from my address when replying by email.
 
yes the power should come in go through the fuse and probably fork off to
the standby circut and on the otherside through the relay on to the
voltage regulator, the relay should be a small black box with four pins (2
for magnetic coil, and 2 that function as the actual switch) the power for
the relay coil comes from the standby circut. hope you get it running:)
 
Leonard Caillouet wrote:

That still does not make the load irrelevant. Those fuses are only of use
in the case of a short in a unit. The capacity of the circuit is not
unlimited.
Click to expand...
I think what was meant was that the number of devices plugged in does
not matter as long as the total load is kept under the rating of the
circuit (and the rating of any extension cords, power bars, etc.)

For example, a normal North American 15A circuit can supply 1 15A
device, 15 1A devices or 100 0.15A devices.

A computer is probably around 600W max, which at 220V (The original post
was from Britain, right?) is a bit under 3A. If the circuit can take
13A you could plug in 4 of those computers without a problem (assuming
nothing else is connected).


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Hi,

The remotes I get for the KV20TX11 television are the RM-765 or
(universal) RM-Y133 neither of which I get references for on the Sony
site. I would call Joseph Electronics in Niles, Il and run your model #
by them. Their phone is 800-323-5925 and if you're a professional,
aren't we all, you'll get the pro discount.

Richard
 
Just so you don't think it is a fluke, I found basically the same thing with the
Durabrand 27" DCT2704R that I just bought last month at Walmart. I thought it
was very strange. I didn't tell the wife though since she is one of these folks
who thinks anything beyond an ON/OFF button and a way to change channels/volume
is a waste of time so the service settings would surely throw her for a loop.
Anyway, I wonder how many other brands of newer TV's suffer this same thing?

Lawrence
 
Well, I decided to call the 800 number on my user's manual, and asked about
this. The tech support said that this is simply the way the TV was designed
and it may behave strangely if you press certain buttons on a 3rd party
remote. I asked if there is any way to lock it out of going into service
mode, they said there is not, and said that their only recommendation was
just to use the remote that came with the TV.

I told them that I think their engineers made a bad decision in designing it
this way, but since I only paid $99 I guess I can't really complain.

J.

<<Just so you don't think it is a fluke, I found basically the same thing
with the
Durabrand 27" DCT2704R that I just bought last month at Walmart. I thought
it
was very strange. I didn't tell the wife though since she is one of these
folks
who thinks anything beyond an ON/OFF button and a way to change
channels/volume
is a waste of time so the service settings would surely throw her for a
loop.
Anyway, I wonder how many other brands of newer TV's suffer this same thing?

Lawrence >>
 
The problem is that somone who doesn't understand this problem should
accidentally press one of those buttons by mistake. Also it's annoying when
it does happen.

Luckily it does not appear that the remote actually lets you change any of
the settings once you're in Service Mode. The only way to change a setting
is from the buttons on the TV itself. I guess it would not hurt to write
down all the settings just to be on the safe side.

J.

<< I didn't tell the wife though since she is one of these
folks
who thinks anything beyond an ON/OFF button and a way to change
channels/volume
is a waste of time so the service settings would surely throw her for a
loop. >>
 
"Nicolaas Hawkins" <grumpy@any.time> wrote in message
news:dzbozq9cyg48.p4vuhsz3rng8$.dlg@40tude.net...
| Big deal. It is no less wrong because of that.

PLONK!
 
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