Toshiba TV29C90 problem; Image fades to black...

[Roger Hamlett]

"Alberto" <no@no-email.com> wrote in message
news:Xns9853B4D6685D471F3M4@127.0.0.1...

I am in the UK. I was looking for useful spare parts inside a broken 29
inch Panasonic TV (model TX29-AD1) and I had removed all the electronics
boards and the two speakers.

I then picked up what was left of the TV: the tube and plastic outer
casing.

Phew! It weighted a hell of a lot!

Does anyone know APPROXIMATELY what an actual 29 inch CRT picture tube
weighs?

In my case it was the old-style screen ratio and ISTR the picture tube
had a Philips sticker on it.
It depends on the EHT voltage used. If this was for a relatively modern

set,using '100Hz' scanning, then the EHT will be higher, and the glass
used in the front has to have better radiation protection. For this the
figure given by another poster, of about '100lbs', is probably a little
high, but not that far off (typically the whole set, will be about 90lbs,
and the tube about 3/4 of this, so perhaps 65lbs). 50Hz sets, are usually
a fraction lighter, but probably still over 50lbs for the tube. Tubes
supporting really high frequency operation (CRT's, rather than TV's), will
push higher (for example, a 24" Hitachi monitor, tops 100lbs, and the tube
is heavier than the 29" examples mentioned...

Best Wishes

 

[Michael A. Terrell]

"John E. Carr" wrote:

Hi Tech's, I am loking for a replacement Cartridges for this jukebox,
does anyone have clues?

Tia, john Carr

JOHN'S REPAIR CENTER
PHILA., PA. 19148

news:rec.antiques.radio+phono


--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida

 

[Homer J Simpson]

<skuppa@gmail.com> wrote in message
news:1160116922.442527.118870@k70g2000cwa.googlegroups.com...

While moving between apartments, I lost the remote control for my
Magnavox 20" TV (model is 20MT1331/17). What is the best way for me to
get a remote for it now? I see a few universal remotes which are
cheaper, but how do we know whether it is compatible with my TV? The
regular remote on the Philips website costs $35...can't afford it!

Most universal remotes will work. They're as cheap as $3 ea here. You may
not get every function but at least it will do the basics. Also ask on the
freebies sites

http://freecycle.org/

or

http://www.craigslist.org/


--

 

[carneyke]

IIRC Deltron is in Pennsylvainia and they rebuild them at a low cost,
may even give you a copy of the schematic or at least sell one. Sorry,
forgot you were in UK
Iain Wilkie wrote:

Can anyone help me here....

Need a diagram for a Deltron Quad Switcher PSU Model V300B (circa 1994)

Appreciate any help

Iain


--

http://www.wilkie-electronics.co.uk

Wilkie Electronics
16, Muirhall Terrace
Perth
PH2 7ES
Scotland
United Kingdom

Tel/Fax +44 (0)1738 621492

 

[Meat Plow]

On Fri, 06 Oct 2006 10:32:32 +0000, Iain Wilkie Has Frothed:

Can anyone help me here....

Need a diagram for a Deltron Quad Switcher PSU Model V300B (circa 1994)

Appreciate any help

Iain

Deltron, Inc. 290 Wissahickon Avenue North Wales, PA 19454
Toll Free: 800-523-2332 Phone: 215-699-9261 Fax: 215-699-2310 E-mail: sales@deltroninc.com

--
Pierre Salinger Memorial Hook, Line & Sinker, June 2004

COOSN-266-06-25794

 

[Meat Plow]

On Fri, 06 Oct 2006 10:43:23 +0200, Udo Piechottka Has Frothed:

Does anyone have schematics as .pdf for this tape reel recorder?

Thanks - Udo

http://www.fostex.com/index.php?file=contact_us/contact_us

Didn't see your model as being one available for download so you'll need
to contact Fostex directly.

I'm a former Fostex service agent.


--
Pierre Salinger Memorial Hook, Line & Sinker, June 2004

COOSN-266-06-25794

 

[Meat Plow]

On Thu, 05 Oct 2006 23:42:02 -0700, skuppa Has Frothed:

Hi,

While moving between apartments, I lost the remote control for my Magnavox
20" TV (model is 20MT1331/17). What is the best way for me to get a remote
for it now? I see a few universal remotes which are cheaper, but how do we
know whether it is compatible with my TV? The regular remote on the
Philips website costs $35...can't afford it!

I don't have any other electronic equipment yet and am a poor grad student
currently. Please suggest the best way out of this...your time and effort
in helping me are greatly appreciated!

With reg,
SK

Any decent universal remote will work. And they only cost a couple bucks
US.


--
Pierre Salinger Memorial Hook, Line & Sinker, June 2004

COOSN-266-06-25794

 

[Airioch]

In article <1160109286.411142.297540@m7g2000cwm.googlegroups.com>,
stratus46@yahoo.com says...

test@test.com wrote:
Recently got a sony PVM-1954Q that had some bad electrolytics in
it.

I recapped the A board, (132 caps, I won't be doing that anytime
soon again) fired it up and did the alignments according to the
service manual (I have that as well).

The only issue that 'remains' is there are 3 lines, one each for
the red, blue, and green guns at the very top of the picture.
This is evident in all modes, 4:3, 16:9, and underscan. You cant
'see' it in 4:3 mode as it's at the very top of the display but
it's there if you move the picture with the vertical centering.

Wave forms and voltages look normal on IC506, 502, Q507 and Q505.

Picture looks good. All other alignments appear to work correctly.

Just can't get rid of those retrace lines. They look abnormal when
you use the 16:9 or underscan modes.

Anyone ever run across anything like this ?

Firts thing, you went WAY overboard on the caps thing. As others said,
C572 and C584 are the most common bad ones. There are a couple others I
check in the sweep area, C588, C590 and a few others. Get an ESR meter
and you'll save scads of time.

I'll have to get an ESR meter ( I don't normally work on monitors for
folks..), always good to have tools laying about when you need them.


Checked all the component values in the vertical drive area. All of them
are well within tolerance. C576,584,587,588,589,590,591,586 (I've
replaced all the electrolytics but pulled the ones in the section and
checked them anyway..) All the resistors R1515,1522,1523,1527,1528,1531
all check out as well, almost spot on the value as stated on the
schematic and in the parts list. Q513 and 515 appear to be okay as well,
I've getting a pretty close hfe reading on both of them, 157 I believe
was the figure, no leakage.

Your 'retrace' lines are not retrace lines. Those are the beam current
feedback measurements and if you get rid of them, it will look
terrible. In NTSC they fall on lines 17,18,19 - RGB respectively. You
measure TP403 with a scope and set G2 until the lowest value of those 3
lines is +1.35 volts.

Looked at that, I'm coming up with 1.35 as measured on the lowest of the
set, tried dropping it lower, still see the aforementioned lines.

Are you indicating that those lines are supposed to be there and visible
? (I've never seen this monitor or one like it run before so this is new
to me... I'm just going by what the owner was indicating, "one day they
were not there, now they are.." )

Do you have the service manual? It explains most of this though the
schematics are drawn poorly.

If you can call it a service manual, yes, I have it. Test points not
labeled or not listed, signals present on the test points not indicated,
heck I think I've only found one or two of them on the schematic itself.

The G2 alignment, I kept looking for the Screen VR reference, ahhhh,
look at the S board, look at the CRT, look, G2 and it's associated
adjustment. Pretty poorly put together.

All the components I've checked are within 5% of specified values, even
the ceramic disc caps are within 10%.

I appreciate the responses.

airi--

 

[Iain Wilkie]

Cheers Guys.....

Contacted Deltron..... schematic supplied no problem.

1st Class Service !!

--

http://www.wilkie-electronics.co.uk

Wilkie Electronics
16, Muirhall Terrace
Perth
PH2 7ES
Scotland
United Kingdom

Tel/Fax +44 (0)1738 621492




"Meat Plow" <meat@meatplow.local> wrote in message
newsan.2006.10.06.13.25.12.285000@nntp.sun-meatplow.local...

On Fri, 06 Oct 2006 10:32:32 +0000, Iain Wilkie Has Frothed:

Can anyone help me here....

Need a diagram for a Deltron Quad Switcher PSU Model V300B (circa 1994)

Appreciate any help

Iain

Deltron, Inc. 290 Wissahickon Avenue North Wales, PA 19454
Toll Free: 800-523-2332 Phone: 215-699-9261 Fax: 215-699-2310
E-mail: sales@deltroninc.com

--
Pierre Salinger Memorial Hook, Line & Sinker, June 2004

COOSN-266-06-25794

 

[Meat Plow]

On Fri, 06 Oct 2006 12:32:41 -0700, stratus46 Has Frothed:

Airioch wrote:
In article <1160151644.392889.146640@i42g2000cwa.googlegroups.com>,
stratus46@yahoo.com says...

snip..

I just looked at 1354 at my bench. The call lines are only visible
in
underscan regardless of pulse cross.

Hmmm, I see them in underscan and 16:9 modes on the 1954, 4:3 of
course
they are at the top out of visible sight.

The main reason I'm 'worried' about them is I was told one day they
weren't.

They were visible in 4:3 until I replaced the Electrolytics, there
was a
slight vertical foldover and the caps fixed that (well one of them
did).

again, I appreciate the response.

Recommend any good ESR testers ?

airi--

You're right on the 16:9 mode. I rarely use it so I forgot.

We use the 'Capacitor Wizard' which works very well but I heard it was no
longer available. Check threads on ESR meters. There is a lot of info on
this.

GG

I use a BK 881 ESR and it seems to do a great job.



--
Pierre Salinger Memorial Hook, Line & Sinker, June 2004

COOSN-266-06-25794

 

[Homer J Simpson]

"Airioch" <test@test.com> wrote in message
news:MPG.1f9042f87e53deb3989685@newsgroups.comcast.net...

Recommend any good ESR testers ?

Elektor published a design for a Cap/ESR meter.

John's Jukes in Vancouver BC sells a kit which has been recommended.

 

[Fastvale]

"Meat Plow" <meat@meatplow.local> ha scritto nel messaggio
newsan.2006.10.06.19.25.33.503000@nntp.sun-meatplow.local...

On Fri, 06 Oct 2006 18:54:47 +0000, Bryan Hunter Has Frothed:

Hi,
I switched this TV on today and after a few seconds the sound came on
for
about 2 secs before there was a click like the TV had switched to
standby
and the sound went off and no picture appeared. The standby light then
flashed continuously until the power was switched off. This repeats each
time it is switched on.

Can anyone suggest what this fault is?

Thanks, Bryan.

High voltage protection.

http://www.iwaynet.net/~nesda/SonyBlink.html

http://myweb.accessus.net/~090/sonyadj.html

 

[Airioch]

In article <1160163534.735088.250910@i42g2000cwa.googlegroups.com>,
stratus46@yahoo.com says...

<snipppp>

BTW I also forgot that those cal lines were always there so if you have
ops saying otherwise, they just didn't notice. I call it the dripping
faucet syndrome. It's REAL hard to go back to not hearing the drip.

Hmmmmm, well, I don't like chasing ghosts... I suppose it would have
helped to have viewed the monitor before all this started. That would be
in a perfect world.

The Sony broadcast BVM series also does beam feedback and has those
lines at the start of V sweep. If colorists can get over it, EVERYBODY
can because those folks are the most demanding group there is.

I'm working on this one for a video editor friend of mine, he's awfully
demanding Sometimes pretty hard on the equipment too, but amazing to
watch work.

I'll take a look at ESR meters that have been suggested in the thread. I
actually have most of the Elecktor issues that were released here in the
states, to many neat articles and projects to pitch them. I'll go back
and take a look there as well.

Thanks for the response.

airi--

 

[Airioch]

In article <zNyVg.52909$E67.8632@clgrps13>, nobody@nowhere.com says...

"Airioch" <test@test.com> wrote in message
news:MPG.1f9042f87e53deb3989685@newsgroups.comcast.net...

Recommend any good ESR testers ?

Elektor published a design for a Cap/ESR meter.

John's Jukes in Vancouver BC sells a kit which has been recommended.

I'll have to take a peek, I have a bunch of the Elektor issues that
were released here in the States, then they went away, not enough
circulation I suppose.

I'll take a peek and the suggestions you all have made.

Thanks for the information/suggestions.

airi--

 

[Homer J Simpson]

"Airioch" <test@test.com> wrote in message
news:MPG.1f90a20e79c1c381989686@newsgroups.comcast.net...

I'll take a look at ESR meters that have been suggested in the thread. I
actually have most of the Elecktor issues that were released here in the
states, to many neat articles and projects to pitch them. I'll go back
and take a look there as well.

I can post the Elektor article if you want it, but IIRC it uses a custom PIC
chip so you'll need to source that.

 

[Meat Plow]

On Fri, 06 Oct 2006 22:34:20 +0200, Fastvale Has Frothed:

"Meat Plow" <meat@meatplow.local> ha scritto nel messaggio
newsan.2006.10.06.19.25.33.503000@nntp.sun-meatplow.local...
On Fri, 06 Oct 2006 18:54:47 +0000, Bryan Hunter Has Frothed:

Hi,
I switched this TV on today and after a few seconds the sound came on
for
about 2 secs before there was a click like the TV had switched to
standby
and the sound went off and no picture appeared. The standby light then
flashed continuously until the power was switched off. This repeats
each time it is switched on.

Can anyone suggest what this fault is?

Thanks, Bryan.

High voltage protection.


http://www.iwaynet.net/~nesda/SonyBlink.html

http://myweb.accessus.net/~090/sonyadj.html

Bad guess, I guess.


--
Pierre Salinger Memorial Hook, Line & Sinker, June 2004

COOSN-266-06-25794

 

[lsmartino]

newstips6706@yahoo.com ha escrito:

Nigerian Physicist Invents Virtual Reality Video Game "Played via
thought".

100+ Years more advanced than any video game system on the market.

http://ueberalles.50webs.com/whatisueberalles.html

"Play with The Future, Today."

 

[quietguy]

So, logic should get you there. You have all the other pins ID so ignoring
the NCs there might be just one pin left

David

Jack wrote:

"Meat Plow" <meat@meatplow.local> wrote in message
newsan.2006.10.04.18.39.58.337000@nntp.sun-meatplow.local...
On Wed, 04 Oct 2006 21:04:54 +0300, Jack Has Frothed:

I had one of these brought in, since the customer had accidentally
severed
the VGA connector off from end of the cable.

I figured out all but one connection. Where I connect the "VGA CON" line
on the HD15 connector?

The service manual does not have this info.

Thanks,

Jan
Finland

Pin assignments
1 RED Red video signal
2 GREEN Green video signal
3 BLUE Blue video signal
4 N/C Not connected
5 GND Ground
6 RED_RTN Red video signal return
7 GREEN_RTN Green video signal return
8 BLUE_RTN Blue video signal return
9 N/C Not connected
10 GND Ground
11 N/C Not connected
12 SDA I2C data
13 HSYNC Horizontal synchronization signal
14 VSYNC Vertical synchronization signal
15 SCL I2C clock

--
Pierre Salinger Memorial Hook, Line & Sinker, June 2004

COOSN-266-06-25794

Thanks, but in Viewsonic service manual, there is a "VGA CON" coming from
the circuit and going to the VGA connector. This is what I was looking for.

Jan

 

[Bob Parker]

newstips6706@yahoo.com wrote:

Nigerian Physicist Invents Virtual Reality Video Game "Played via
thought".

100+ Years more advanced than any video game system on the market.

http://ueberalles.50webs.com/whatisueberalles.html

"Play with The Future, Today."

I wonder what kind of trojans & spyware it loads onto the PC of
anyone naive enough about Nigerian criminal gangs to download and run
the zip file?

Bob

 

[Homer J Simpson]

"Bob Parker" <bobp.deletethis@bluebottle.com> wrote in message
news:45288546$0$8418$5a62ac22@per-qv1-newsreader-01.iinet.net.au...

newstips6706@yahoo.com wrote:

"Play with The Future, Today."

I wonder what kind of trojans & spyware it loads onto the PC of anyone
naive enough about Nigerian criminal gangs to download and run the zip
file?

Still looks like foil beanie stuff.