Best Source for TV Schematics??

[Chuck Harris]

I just meant the stuff that's coming. With the EU having gone crazy
about RoHS there will be lots of electronics gear shoved onto our market
that is compliant. And that might not be a good thing.

Not a lot, *all* will be RoHS. Every electronics component manufacturer on the
face of the earth is in the process of converting over. Anyone that introduces
lead products into their factory supply stream is going to be assumed to be making
non RoHS compliant parts.

The Euronation is going to be single handedly responsible for the destruction of
electronics. We are going to see reliability shoved all the way back to where it
was during the tube era.

Tin whiskers were fun when they first showed up in through hole electronics. Imagine
how much more fun they are going to be with the fine lead pitches used today! You
used to have to wait until the whisker grew about 1/10th of an inch before you had
a problem. Now, it has to grow only 1/8th that far.

-Chuck Harris

 

[Joerg]

Hello Chuck,

Not a lot, *all* will be RoHS. Every electronics component manufacturer
on the
face of the earth is in the process of converting over. Anyone that
introduces
lead products into their factory supply stream is going to be assumed to
be making
non RoHS compliant parts.

AFAICT you could solder RoHS parts with lead solder, just not voice
versa. Of course, if the parts are tinned then whiskers can and probably
will grow from there as well.

The Euronation is going to be single handedly responsible for the
destruction of
electronics. We are going to see reliability shoved all the way back to
where it
was during the tube era.

Tube stuff was (and is) remarkably reliable. The old Astor radio here in
the office hails from the mid 50's and going strong. Had to replace only
one tube, couldn't obtain it and reworked the bias slightly to adapt
another.

The Hammond organ's tube amplifier never needed any care other than
dusting since 1961. And so on.

Tin whiskers were fun when they first showed up in through hole
electronics. Imagine
how much more fun they are going to be with the fine lead pitches used
today! You
used to have to wait until the whisker grew about 1/10th of an inch
before you had
a problem. Now, it has to grow only 1/8th that far.

Maybe electronics will be shipped with a micro tooth brush that has
stiff bristles

 

[Michael A. Terrell]

I allways ran over to the local library. There is one not too far that had a
pretty complete Sams on hand. A couple of dimes in the machine and I was
off.

Cheers

That model isn't listed in Sams index. http://www.samswebsite.com/


--
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

 

[Chuck Harris]

Hi Joerg,

AFAICT you could solder RoHS parts with lead solder, just not voice
versa. Of course, if the parts are tinned then whiskers can and probably
will grow from there as well.

It is quite a treat to watch RoHS parts when you heat them up to solder.
The finish starts out shiny and smooth, and when the heat hits the RoHS
solder, it crinkles up, and becomes all mossy. Perfect as a launching
platform for whiskers. The lead in tin lead solder works just fine, but
it doesn't diffuse up enough to alloy with all of that tin solder on the
parts.

Tube stuff was (and is) remarkably reliable.

Some was, and some wasn't. The Tektronix and HP gear was remarkable.
The consumer grade radios and televisions that showed up in the US were
trash.

The old Astor radio here in

the office hails from the mid 50's and going strong. Had to replace only
one tube, couldn't obtain it and reworked the bias slightly to adapt
another.

That is unusual.

The Hammond organ's tube amplifier never needed any care other than
dusting since 1961. And so on.

That is also unusual. But remember an amplifier is a dirt simple circuit,
remember the old tube color TV's.
....

Maybe electronics will be shipped with a micro tooth brush that has
stiff bristles

We are sure going to need it. And the whiskers aren't the whole problem,
the tin joints look like junk even when they are good. How can you tell
a good one from a bad one?

Parts that are RoHS are very short shelf life too. It takes very little
time before the tin oxidizes, and you cannot solder to it even with good
active fluxes.

The whole RoHS act is based on flawed reasoning. Sure, it would be a good
idea to remove lead from the environment, but gasoline was the largest
contributor (and they eliminated that), well the next greatest contributor
isn't electronics... Electronics is far below automobile batteries...far, far
below.

One of the greatest contributors to lead in humans is plumbing. Sure they got
rid of lead in the solder (and the new solder works great BTW!), but what
about the millions of miles of lead mains that are scattered in the cities
through out the world? There are more tons of lead there than have ever been
used in electronics since electronics began.

-Chuck

 

[scada]

The TV I bought for my office on 9/11/2001 has gone on the fritz...

Panasonic TIC-15LT1

Warms up, then flicks back and forth between a perfectly good picture,
then totally washed out. Sound always stays good.

Who's the best source for a schematic? I'm leery of the Russian
sites, which seem to dominate this topic.

...Jim Thompson

I use http://www.servicemanuals.net/(dzgt03ezuxblzy45chidgd55)/service.aspx
They have you schematic in CD or a download.

 

[Richard Crowley]

"Joerg" wrote ...

Same here. And certainly not with RoHS compliant
solder. I can already see myself resoldering RoHS
stuff to get it back to non-RoHS performance.

Notify the authorities! Blatant disregard for the
environment! (Not

 

[Richard Crowley]

The TV I bought for my office on 9/11/2001 has gone on the fritz...

Panasonic TC-15LT1

Warms up, then flicks back and forth between a perfectly good picture,
then totally washed out. Sound always stays good.

Does "washed out" mean that there is *some* image
left, or does it go completely white? Intermittent
signal connection to display panel?

Or does "washed out" mean goes dark? Intermittent
connection to backlight?

Who's the best source for a schematic? I'm leery of the Russian
sites, which seem to dominate this topic.

http://service.us.panasonic.com/faq/faq.aspx#Q10

"How can I order Literature (Operating or Service
Manuals) for my Panasonic product?"

"....Service Manuals can be purchased by contacting
our National Parts Department at 800-833-9626 or
through our Feedback page (using the Parts Information
subject)."

I also noted that they list online what appears to be ALL
the components by (Panny) part number, description, and
price. For example the LCD panel is $477.07 amd the
back-light at $141.42 But I have found that many times
their cost for parts like that exceed the entire retail
purchase price of the product. :-(

 

[Jim Thompson]

I use http://www.servicemanuals.net/(dzgt03ezuxblzy45chidgd55)/service.aspx
They have you schematic in CD or a download.

Thanks!

...Jim Thompson

 

[Jim Thompson]

...

Does "washed out" mean that there is *some* image
left, or does it go completely white? Intermittent
signal connection to display panel?

Or does "washed out" mean goes dark? Intermittent
connection to backlight?

The image actually looks like a film negative.

http://service.us.panasonic.com/faq/faq.aspx#Q10

"How can I order Literature (Operating or Service
Manuals) for my Panasonic product?"

"....Service Manuals can be purchased by contacting
our National Parts Department at 800-833-9626 or
through our Feedback page (using the Parts Information
subject)."

I also noted that they list online what appears to be ALL
the components by (Panny) part number, description, and
price. For example the LCD panel is $477.07 amd the
back-light at $141.42 But I have found that many times
their cost for parts like that exceed the entire retail
purchase price of the product. :-(

...Jim Thompson

 

[Fred Bloggs]

The image actually looks like a film negative.

It's obviously some crummy little power supply bias. Can you try looking
up the datasheet of the LCD panel to see what it requires, and then
probe the dumb thing.

 

[Jim Thompson]

It's obviously some crummy little power supply bias. Can you try looking
up the datasheet of the LCD panel to see what it requires, and then
probe the dumb thing.

That's why I seek the schematic. It's a rather compact/dense PCB.

...Jim Thompson

 

[Chris Jones]

The TV I bought for my office on 9/11/2001 has gone on the fritz...

Panasonic TC-15LT1

Warms up, then flicks back and forth between a perfectly good picture,
then totally washed out. Sound always stays good.

Who's the best source for a schematic? I'm leery of the Russian
sites, which seem to dominate this topic.

...Jim Thompson

Did you ask in sci.electronics.repair? That would be the obvious place.

Chris

 

[Frithiof Andreas Jensen]

Use the space formerly taken up by the TV to buy some ex-soviet
military technology (maybe not the same sites, but maybe adjacent
ones!) to sit in your office. On E-bay there's a lot of interesting
stuff coming out of Ukraine/Georgia/Russia right now.

Like ??

 

[Tim Shoppa]

Like ??

I'm particular interested in medium- and high-power microwave and RF
stuff. Everything from individual parts to complete sets and test
equipment shows up. There's a lot of other stuff appearing too but I
don't pay as much attention .

Tim.

 

[Frithiof Andreas Jensen]

I'm particular interested in medium- and high-power microwave and RF
stuff. Everything from individual parts to complete sets and test
equipment shows up. There's a lot of other stuff appearing too but I
don't pay as much attention .

I am looking to get a dosimeter from "ECO-TEST" in ukraine (after all, those
russ boyz must know how to make that ;-). Then night vision, thermal and
radar stuff but that is more for fun.