Toshiba TV29C90 problem; Image fades to black...

<mdrusthum@gmail.com> wrote in message
news:5fad0739-e376-48ef-a6d7-03bbf16951a0@p31g2000prf.googlegroups.com...
rusthum.blogspot.com
rusthum@gmsil
babies suck i hate them.
 
"UCLAN" <nomail@thanks.org> wrote in message
news:my9nk.15717$1N1.10077@newsfe07.iad...
tnom@mucks.net wrote:

Several indoor antennas work significantly better that rabbit ears?
I think not. If his rabbit ears won't work then a super duper
amplified "As Seen on TV" antenna would be a waste of money.

I disagree, strongly. Read some opinions on AVS, or go to:
http://www.hdtvantennalabs.com/reviews/Terk-HDTVa-reviews.html
I've seen this antenna and the unamplified model in action, along
with ordinary rabbit ears. It was no contest.
The first review goes like this...

"Design and construction is so flimsy the antenna was unable to support
itself in an upright position without supplemental bracing. All our HD
stations are on the same tower site so the distance to each is 20 miles (+/-
one mile) and bearings are +/- 2 degrees. Using the autotune feature on the
TV, this antenna was only able to capture 3 digital signals and unable to
hold any of them long enough to permit viewing a program. A few of the
analog stations were picked up, however, the picture quality was so bad the
signals it did receive were useless. Got out my $10, 30-year old rabbit
ears, pluggged into my high dollar TV and got 19 digital channels plus
excellent performance on analog. Took the Terk back to Best Buy."

Terk makes junk. I had one of their amplified indoor FM antennas that
actually gave worse audible performance than a piece of wire.
 
Brasto <bram.stolk@gmail.com> wrote:

That was a good help explaining that this machine has a split
powersupply.
I located the STK5362 and discovered it has 15 VDC as an Input to pin7
and all the other pins are zero or very low.
You are right data on the STK5362 is very rare, guess the machine will
need 5 and 12 VDC at some points.
I'll try to reconstruct the voltages using external powersupplies and
if I resurect the Pioneer VE-D70 this way I'll modify the STK circuits
using some state of the art Voltage regulators.

I don't know if you received the email, got similar ones from two different
accounts.

The Sony model of that machine is the ev-s700 and a picture of it is here:

http://www.totalrewind.org/miniature/M_EVS7.htm

Like I said, it'll still be looking for a needle in a haystack for the
service manual but better odds on Sony than Pioneer.

-bruce
bje@ripco.com
 
"UCLAN" <nomail@thanks.org> wrote in message
news:l%knk.10127$Bt6.4527@newsfe04.iad...
William Sommerwerck wrote:

The first review goes like this...

"Design and construction is so flimsy the antenna was unable to support
itself in an upright position without supplemental bracing. All our HD
stations are on the same tower site so the distance to each is 20 miles
(+/-
one mile) and bearings are +/- 2 degrees. Using the autotune feature on
the
TV, this antenna was only able to capture 3 digital signals and unable to
hold any of them long enough to permit viewing a program. A few of the
analog stations were picked up, however, the picture quality was so bad
the
signals it did receive were useless. Got out my $10, 30-year old rabbit
ears, pluggged into my high dollar TV and got 19 digital channels plus
excellent performance on analog. Took the Terk back to Best Buy."

How nice of you to quote back the worst review. How about all of the
"5 Star" reviews, like:

"Before I bought this antenna, I was using a smaller HD antenna that was
shady
at besr. I bought the terk at best buy simply because it was open and they
discounted it. I couldn't believe the difference. I scanned the available
channels again, and discovered that I was now getting at least twice the
number of channels that I was getting with my old HD antenna. I highly
recommend the Terk HDTVa. It may be pricey but it's worth it."
The reason I quoted it was that (assuming it was an honest review, which it
seemed to be) it pointed up the fact that amplified antennas don't always
work very well.

It's also worth noting that the five-star review you quote was from someone
who did not bother to comare the Terk's performance with a pair of rabbit
ears -- which the first reviewer did.
 
"Franc Zabkar" <fzabkar@iinternode.on.net> wrote in message
news:93dq9493gu60m8u2394782mlt2gl6gk52a@4ax.com...
On Thu, 07 Aug 2008 17:06:07 +0100, "Ron(UK)"
ron@lunevalleyaudio.com> put finger to keyboard and composed:

Does anyone have, or can point me to towards a circuit diagram
(Schematic) for an SWR Baby Blue bass amp.

http://www.swrsound.com/support/faq.php#service

Q: How can I order a schematic?

A: To request a schematic, please provide your full name and mailing
address (or fax number), along with the model and serial number of
your amplifier. Send your request to "swrcustserve at fender dot com",
or contact the FMIC Consumer Relations Department, 480-596-7195.

- Franc Zabkar
Aha! So does this imply that they were always / are now part of Fender ?

Arfa
 
"Jack00" <SPal508596@aol.com> wrote in message
news:7048c693-e20e-4493-8bac-eaf5adc641c0@e39g2000hsf.googlegroups.com...
On 9 Aug, 11:43, "Mark D. Zacharias" <nonse...@nonsense.net> wrote:
"Jack00" <SPal508...@aol.com> wrote in message

news:9033ca30-01f8-41c9-bb23-a16031092079@f63g2000hsf.googlegroups.com...

When I switch this television set on it works fine but after 10
minutes there is field collapse and the sound is ok. I heard it has
an Orion chassis. Does anyone know for which model? What normally
goes wrong here? Thanks

By "field collapse" do you mean loss of vertical deflection (picture
drops
to a single line across the screen from right to left) ?

Vertical problems were frequent on Toshiba chassis sets for a number of
years in the 90's and into the 2000's.

Mark Z.

Yes, loss of vertical deflection. What could be wrong?

Usually, bad solder connections at the vertical output IC, and potentially a
SLEW of bad capacitors.

Mark Z.
 
"UCLAN" <nomail@thanks.org> wrote in message
news:mSunk.9095$3l5.493@newsfe06.iad...
William Sommerwerck wrote:

The reason I quoted it was that (assuming it was an honest review, which
it
seemed to be) it pointed up the fact that amplified antennas don't always
work very well.

As I noted, the antenna comes in amplified and non-amplified versions. The
amplified version can have the amplifier switched off without killing all
signals, a fact the reviewer failed to mention. Methinks it was operator
error on his part more than the failure of the antenna.

It's also worth noting that the five-star review you quote was from
someone
who did not bother to comare the Terk's performance with a pair of rabbit
ears -- which the first reviewer did.

Inasmuch as "rabbit ears" do a horrible job at best in receiving UHF
signals, such a comparison would be useless. *That* is one reason
that the post praising "the TV's rabbit ears" over any indoor antenna
was so laughable.
I don't remember the poster praising rabbit ears over _any_ indoor
antenna -- just the Terk. Are you certain he's wrong -- or lying?

People often have simple antennas lying around. You don't claim an expensive
product is good or superior without comparing it with exisiting products.
That's called a "control".

Some years back, when attending the SCES, I bought, on impulse, a Terk
indoor amplified FM antenna. As I said earlier, it was audibly inferior to a
piece of wire. I need to explain this.

At that time, I lived in Bellevue, WA, around the corner from Microsoft.
This was an area of severe multipath, which (despite the high signal
levels), would have justified a directional antenna. On some stations, it
was necessary to adjust antennas to minimize the multipath, or you'd have
audible distortion and breakup. This was not a problem with the wire, but
the Terk could not be positioned to eliminate the distortion.

Amplification is not suitable compensation for an undersized antenna. (Many
years ago I asked an engineer at Channel Master whether it was possible to
design a "tiny" multi-element antenna that discarded gain in favor of
directionality. He said it wasn't.)


Those that are using their TV's rabbit ears with a converter box to
receive digital transmissions are not getting all of the signals. Period.
You know this as fact?
 
"edge" <thedge000@yahoo.com> wrote in message
news:87d5e117-8acb-4e2a-9fb8-cf6c48bdc52b@x35g2000hsb.googlegroups.com...
I have a Sony TV model KV13M31that lost vertical hold and the color
is intermittent. What are the likely bad components? Thanks
read the fucking repair faq website:

http://www.repairfaq.org/samnew/tvfaq/tvintmisc.htm
http://www.repairfaq.org/samnew/tvfaq/tvvlockl.htm
 
"Sitre Josephenne Magana" <sitremagana@yahoo.com> wrote in message
news:g5rjt5$rpm$1@aioe.org...
"aarpay via ElectronicsKB.com" <u36611@uwe> wrote in message
news:874ae45d5f133@uwe...
Hi all:

I turned on my TV, heard a loud "pop!", then the TV went into standby
mode.
If I attempt to turn it on, it goes back into standby. I found a blown
capacitor inside the power board, replaced it, and the TV would come on
for
about 10 seconds, then the capacitor would blow again. I replaced it
twice,
and it keeps blowing out. Does anyone have any advice, suggestions,
experience? Apparently, a lot of people are having the same problem
(blown
capacitor) with this TV. I'm hoping I can fix it myself; I just need
someone
to help me figure out what the problem is. Thanks a lot!!!!




Al

--
Message posted via ElectronicsKB.com
http://www.electronicskb.com/Uwe/Forums.aspx/repair/200807/1


Throw the set in the trash and forget about T.V. all together. It's boring
and full of commercials. I got so sick of T.V. after a short while I threw
a bowling ball threw my t.v. screen and then finished it off with the
bowling ball. I use the space that my T.V. was in and I filled it up with
Twinkies and Oreos and orange cupcakes. I usually munch to pass the time.

Fuck what all'yall think. If I want to be heavy, that's my prerogative.
Nobody here's stopping you from eating yourself to death you little spic
piece of garbage.
 
On Tue, 12 Aug 2008 13:10:58 -0400, Blattus Slafaly wrote:
What's that green shit in the URL on secure sites?
I never saw an explanation of it.
So... you were putzing around with your browser and saw some "green
shit" (did you sniff it?) and then fired up your usenet client and
decided that going to *sci.electronics.repair* was the best and most
appropriate place to ask about it?

I know --- rhetorical question.
 
"Chrisroberts7577" <chrisroberts7577@gmail.com> wrote in message
news:e0fe2364-0049-47f5-9912-f92b04b58e9d@2g2000hsn.googlegroups.com...
I need help getting help, finding a replacement board, or even finding
the schematic for an AOC (A42HD84) Plasma tv. I believe the main
power supply board (Samsung, LJ44-00092C) is the problem.

When I got the TV there was a blown fuse on the board. See some pics
of the board here: http://chrisroberts7577.googlepages.com/plasmarepair

When the board gets power there is only one voltage correctly present,
all others are non-existent.

Any help or guidance anyone can provide would be greatly appreciated.

The picture you posted doesn't look like a burnt out fuse. It loooks more
like an electrolytic capacitor that exploded. What does the board say in the
area where you removed this component.

Mike
 
"EADGBE" <hwbosshoss@comcast.net> wrote in message
news:75ba8107-8ed5-4029-9106-8eab1e815acc@c65g2000hsa.googlegroups.com...
More CD player shenanigans....

I still haven't gotten round to measuring the voltages in the Audio
Alchemy CD player...but I promise to do so soon!

But in the meantime, I have another question, about another CD
player...

I have a Magnavox CDB650 that I purchased new back in the 1980's.

In all this time, it has never given me any problem (touch wood).

I recently purchased a new CD that the Magnavox player WILL NOT
recognize. When I insert the CD into the player, it spins for a
moment, and then the "Error" light comes on.

This is the ONLY disc I own that this Magnavox won't recognize. It's
as if the player doesn't like the disc or something.

All CDs are full of errors. The encoding scheme is designed to invisibly
correct these errors, provided that the number of errors within a single
block is less than the maximum the encoding scheme can handle. One player
may be able to read a pit, or the absence of, better than another player. I
think that in this case, your Magnavox reads enough errors in a single block
so as to make it incorrectable. In most areas of the disk, this would simply
produce a click. However, if the error is in the TOC (table of contents), it
could glitch the firmware in the player.

Bob Morein
(310) 237-6511
 
EADGBE wrote:

This is the ONLY disc I own that this Magnavox won't recognize. It's
as if the player doesn't like the disc or something.
I'd say the CD player doesn't like the disc then.

The disc may be faulty in a way that matters to that player , but possibly
not others. You get that...


geoff
 
In article <EZmdnXleQPAD_j_VnZ2dnUVZ_o3inZ2d@giganews.com>,
Soundhaspriority <nowhere@nowhere.com> wrote:

I have a Magnavox CDB650 that I purchased new back in the 1980's.

In all this time, it has never given me any problem (touch wood).

I recently purchased a new CD that the Magnavox player WILL NOT
recognize. When I insert the CD into the player, it spins for a
moment, and then the "Error" light comes on.

This is the ONLY disc I own that this Magnavox won't recognize. It's
as if the player doesn't like the disc or something.

All CDs are full of errors. The encoding scheme is designed to invisibly
correct these errors, provided that the number of errors within a single
block is less than the maximum the encoding scheme can handle. One player
may be able to read a pit, or the absence of, better than another player. I
think that in this case, your Magnavox reads enough errors in a single block
so as to make it incorrectable. In most areas of the disk, this would simply
produce a click. However, if the error is in the TOC (table of contents), it
could glitch the firmware in the player.
Overall poor reflectivity of the CD (and thus a reduced contrast and
reduced RF signal "eye" quality) might cause this. A player as old as
the CDB650 might have two things working against it, with regard to
such discs:

- It's old enough that it probably has a lot of hours on its laser.
Output may be dropping, weakening the signal detected by the
photodiode.

- It's pre-CDRW, which may very well mean that its photodiode/sensor
circuitry doesn't have an AGC feature.

If the problem is just one of poor reflectivity, there probably isn't
much that can be done with regard to this particular CD player.

The disc could have other sorts of defects, too. Check the inner rim,
and see if there's any excess plastic "flash" which makes the inner
hole less than perfect. If so, it could prevent the disc from sitting
evenly on the player's spindle - the disc might wobble when rotated,
and be difficult for the laser/optic assembly to track properly.

--
Dave Platt <dplatt@radagast.org> AE6EO
Friends of Jade Warrior home page: http://www.radagast.org/jade-warrior
I do _not_ wish to receive unsolicited commercial email, and I will
boycott any company which has the gall to send me such ads!
 
"EADGBE" wrote ...
I recently purchased a new CD that the Magnavox player WILL NOT
recognize. When I insert the CD into the player, it spins for a
moment, and then the "Error" light comes on.

This is the ONLY disc I own that this Magnavox won't recognize. It's
as if the player doesn't like the disc or something.

This is NOT a CD-R disc. It is a brand new, mint condition, store-
bought disc. It is also NOT a disc with any multimedia content on
it. It is nothing more than a normal, regular CD.

All of my other CD players have no problem playing this disc.
Since the identity of your CD is apparently a secret, we have the option
of speculating that it might be one of those (supposedly ordinary) discs
they tried to put "copy-protection" or "digital-rights-management" on.
http://en.wikipedia.org/wiki/2005_Sony_BMG_CD_copy_protection_scandal
 
"geoff" <geoff@nospam-paf.co.nz> wrote in message
news:xemdnUB_mI-49z_VnZ2dnUVZ_r_inZ2d@giganews.com...
EADGBE wrote:


This is the ONLY disc I own that this Magnavox won't recognize. It's
as if the player doesn't like the disc or something.

I'd say the CD player doesn't like the disc then.

The disc may be faulty in a way that matters to that player , but possibly
not others. You get that...


geoff
I'll second all that the others above have said, and agree with Geoff here.
It's not at all unusual to see players that simply won't play - or have a
lot of trouble playing - just one or two discs out of an owner's collection.
I have had them send in players for repair with an example disc, and they
are quite right, it won't play it, and of course, they have always "tried
the disc in the neighbour's machine, and it's fine !"

But if the player is trouble free with every other disc that you - and
they - put in it, including 'official' test discs with deliberate errors for
checking servo performance etc, what can you do ? You can never see anything
wrong with the eye pattern on such players, and I've even tried replacement
lasers, without altering the symptoms a jot, so I think that it must be a
case of too many errors for the player to correct, but who can tell ...

As you surmise, and Geoff says, the CD player just doesn't like the disc
then :)

You know, I've just had a thought. Long long time ago, I had a Pioneer that
had playability problems just on certain discs. It's very very rare for
Pioneers to suffer a bad laser, and the early ones are unpleasant to replace
because of the diffraction grid adjustment that has to be done. I was loathe
to suspect the laser, so I gave Pioneer Technical a call.

In those days, they had the best guys in Tech Support that you could ever
wish for (they're actually still there, but a lot more difficult to get to
talk to now). Anyways, I asked them about this problem, and they pointed me
at the rubber deck suspensions, saying that the problem was caused by age,
and them having collapsed some. As you might imagine, I was sceptical about
this, but I ordered a set and fitted them, and lo! it cured it completely.
I can only assume that with little or no suspension left, if a slightly
eccentric or off balance disc was put in, instead of the whole deck being
able to freely 'wobble', with the deck touching the sub-chassis, vibration
was instead transferred to the lens suspension, making this vibrate at high
speed.

Given the age of the player in question, might be worth a look at ??

Arfa
 
"Arfa Daily" <arfa.daily@ntlworld.com> wrote in message
news:K9xok.85435$Z24.79582@newsfe19.ams2...
"geoff" <geoff@nospam-paf.co.nz> wrote in message
news:xemdnUB_mI-49z_VnZ2dnUVZ_r_inZ2d@giganews.com...
EADGBE wrote:


This is the ONLY disc I own that this Magnavox won't recognize. It's
as if the player doesn't like the disc or something.

I'd say the CD player doesn't like the disc then.

The disc may be faulty in a way that matters to that player , but
possibly not others. You get that...


geoff


I'll second all that the others above have said, and agree with Geoff
here. It's not at all unusual to see players that simply won't play - or
have a lot of trouble playing - just one or two discs out of an owner's
collection. I have had them send in players for repair with an example
disc, and they are quite right, it won't play it, and of course, they have
always "tried the disc in the neighbour's machine, and it's fine !"

But if the player is trouble free with every other disc that you - and
they - put in it, including 'official' test discs with deliberate errors
for checking servo performance etc, what can you do ? You can never see
anything wrong with the eye pattern on such players, and I've even tried
replacement lasers, without altering the symptoms a jot, so I think that
it must be a case of too many errors for the player to correct, but who
can tell ...

As you surmise, and Geoff says, the CD player just doesn't like the disc
then :)

You know, I've just had a thought. Long long time ago, I had a Pioneer
that had playability problems just on certain discs. It's very very rare
for Pioneers to suffer a bad laser, and the early ones are unpleasant to
replace because of the diffraction grid adjustment that has to be done. I
was loathe to suspect the laser, so I gave Pioneer Technical a call.

In those days, they had the best guys in Tech Support that you could ever
wish for (they're actually still there, but a lot more difficult to get to
talk to now). Anyways, I asked them about this problem, and they pointed
me at the rubber deck suspensions, saying that the problem was caused by
age, and them having collapsed some. As you might imagine, I was sceptical
about this, but I ordered a set and fitted them, and lo! it cured it
completely. I can only assume that with little or no suspension left, if a
slightly eccentric or off balance disc was put in, instead of the whole
deck being able to freely 'wobble', with the deck touching the
sub-chassis, vibration was instead transferred to the lens suspension,
making this vibrate at high speed.

Given the age of the player in question, might be worth a look at ??

Arfa
Hi, Geoff!

The problem with the insulators was just that the disc would "barely" scrape
while trying to play. It was indeed a common problem; replaced many of them.
Sometimes the drive IC would even brown the circuit board as a result.

To the OP regarding the one disc that would not play: try cleaning the disc
itself - sometimes that helps - or perhaps the store you bought it from
would let you try another copy.

As another poster suggested, cleaning the laser lens is certainly worth a
try.

Magnavox (Philips) players were sometimes picky about discs, with nothing
that could really be done about it. When people would complain, the standard
response was, "the disc is out-of-spec, not our problem". A good example of
this was the CD-63 series having problems with discs longer than 74 minutes.


Mark Z.
 
The transducer is probably highly resonant at the operating frequency. If
you change the frequency, output is likely to be greatly reduced.
 
In article <9Eyok.34377$co7.2076@nlpi066.nbdc.sbc.com>,
Mark D. Zacharias <nonsense@nonsense.net> wrote:
"Arfa Daily" <arfa.daily@ntlworld.com> wrote in message
news:K9xok.85435$Z24.79582@newsfe19.ams2...

"geoff" <geoff@nospam-paf.co.nz> wrote in message
news:xemdnUB_mI-49z_VnZ2dnUVZ_r_inZ2d@giganews.com...
EADGBE wrote:


This is the ONLY disc I own that this Magnavox won't recognize. It's
as if the player doesn't like the disc or something.

I'd say the CD player doesn't like the disc then.

The disc may be faulty in a way that matters to that player , but
possibly not others. You get that...


geoff


I'll second all that the others above have said, and agree with Geoff
here. It's not at all unusual to see players that simply won't play - or
have a lot of trouble playing - just one or two discs out of an owner's
collection. I have had them send in players for repair with an example
disc, and they are quite right, it won't play it, and of course, they have
always "tried the disc in the neighbour's machine, and it's fine !"

But if the player is trouble free with every other disc that you - and
they - put in it, including 'official' test discs with deliberate errors
for checking servo performance etc, what can you do ? You can never see
anything wrong with the eye pattern on such players, and I've even tried
replacement lasers, without altering the symptoms a jot, so I think that
it must be a case of too many errors for the player to correct, but who
can tell ...

As you surmise, and Geoff says, the CD player just doesn't like the disc
then :)

You know, I've just had a thought. Long long time ago, I had a Pioneer
that had playability problems just on certain discs. It's very very rare
for Pioneers to suffer a bad laser, and the early ones are unpleasant to
replace because of the diffraction grid adjustment that has to be done. I
was loathe to suspect the laser, so I gave Pioneer Technical a call.

In those days, they had the best guys in Tech Support that you could ever
wish for (they're actually still there, but a lot more difficult to get to
talk to now). Anyways, I asked them about this problem, and they pointed
me at the rubber deck suspensions, saying that the problem was caused by
age, and them having collapsed some. As you might imagine, I was sceptical
about this, but I ordered a set and fitted them, and lo! it cured it
completely. I can only assume that with little or no suspension left, if a
slightly eccentric or off balance disc was put in, instead of the whole
deck being able to freely 'wobble', with the deck touching the
sub-chassis, vibration was instead transferred to the lens suspension,
making this vibrate at high speed.

Given the age of the player in question, might be worth a look at ??

Arfa


Hi, Geoff!

The problem with the insulators was just that the disc would "barely" scrape
while trying to play. It was indeed a common problem; replaced many of them.
Sometimes the drive IC would even brown the circuit board as a result.

To the OP regarding the one disc that would not play: try cleaning the disc
itself - sometimes that helps - or perhaps the store you bought it from
would let you try another copy.

As another poster suggested, cleaning the laser lens is certainly worth a
try.

Magnavox (Philips) players were sometimes picky about discs, with nothing
that could really be done about it. When people would complain, the standard
response was, "the disc is out-of-spec, not our problem". A good example of
this was the CD-63 series having problems with discs longer than 74 minutes.
Yep. I have one from that series, and it chokes on many extended-length
pressed CD's. There's a place in Connecticut that can modify the pickup
circuit to handle off-spec discs better, but then CD-R playback suffers.
 
Arfa Daily wrote:
"geoff" <geoff@nospam-paf.co.nz> wrote in message
news:xemdnUB_mI-49z_VnZ2dnUVZ_r_inZ2d@giganews.com...
EADGBE wrote:


This is the ONLY disc I own that this Magnavox won't recognize. It's as
if the player doesn't like the disc or something.

I'd say the CD player doesn't like the disc then.

The disc may be faulty in a way that matters to that player , but
possibly not others. You get that...


geoff


I'll second all that the others above have said, and agree with Geoff
here.
An option is to dupe it to a good quality CD-R. But if the laser is a bit
'down' it may not like CD-Rs either....

geoff
 

Welcome to EDABoard.com

Sponsor

Back
Top