Toshiba TV29C90 problem; Image fades to black...

[bz]

Paul <paulguy@eastlink.ca> wrote in
news:8q3j34l2kvfott9cdtch11utdfdfm7fpij@4ax.com:

although not quite relevant to the argument in this thread, you should
read this guy's experiences and his discovered gotcha's about ESD
products:
http://archive.evaluationengineering.com/archive/articles/1102esd.htm

VERY interesting. I am glad I started with reading this one. Will read the
other references also and I thank you for them and the time you took to put
them together.

It has been some time (over 30 years) since I worked on a production line
and anti-static precautions were not taken. We made resistors and
capacitors.
It has been almost as long since I worked with radar and very ESD sensitive
diodes.
Since then, I have been lucky, I guess. In Baton Rouge, the high humidity
helps.
I have built some SMT devices recently, using ESD sensitive devices,
working on a foil covered bench and making sure everything was at the foils
potential.
No problems but from the info in the above reference, I can see some places
I could have run into problems if I did things differently.

Again, my thanks.




--
bz

please pardon my infinite ignorance, the set-of-things-I-do-not-know is an
infinite set.

bz+spr@ch100-5.chem.lsu.edu remove ch100-5 to avoid spam trap

 

[bz]

Paul <paulguy@eastlink.ca> wrote in
news:8q3j34l2kvfott9cdtch11utdfdfm7fpij@4ax.com:

although not quite relevant to the argument in this thread, you should
read this guy's experiences and his discovered gotcha's about ESD
products:
http://archive.evaluationengineering.com/archive/articles/1102esd.htm

VERY interesting. I am glad I started with reading this one. Will read the
other references also and I thank you for them and the time you took to put
them together.

It has been some time (over 30 years) since I worked on a production line
and anti-static precautions were not taken. We made resistors and
capacitors.
It has been almost as long since I worked with radar and very ESD sensitive
diodes.
Since then, I have been lucky, I guess. In Baton Rouge, the high humidity
helps.
I have built some SMT devices recently, using ESD sensitive devices,
working on a foil covered bench and making sure everything was at the foils
potential.
No problems but from the info in the above reference, I can see some places
I could have run into problems if I did things differently.

Again, my thanks.




--
bz

please pardon my infinite ignorance, the set-of-things-I-do-not-know is an
infinite set.

bz+spr@ch100-5.chem.lsu.edu remove ch100-5 to avoid spam trap

 

[David Lesher]

charles <charles@charleshope.demon.co.uk> writes:

I always thought the British pound was a unit of currency.

cleverly, we use the same word for two different things to confuse
foreigners.

Just wait until you run into BTU's....


--
A host is a host from coast to coast.................wb8foz@nrk.com
& no one will talk to a host that's close........[v].(301) 56-LINUX
Unless the host (that isn't close).........................pob 1433
is busy, hung or dead....................................20915-1433

 

[David Lesher]

charles <charles@charleshope.demon.co.uk> writes:

I always thought the British pound was a unit of currency.

cleverly, we use the same word for two different things to confuse
foreigners.

Just wait until you run into BTU's....


--
A host is a host from coast to coast.................wb8foz@nrk.com
& no one will talk to a host that's close........[v].(301) 56-LINUX
Unless the host (that isn't close).........................pob 1433
is busy, hung or dead....................................20915-1433

 

[Michael Kennedy]

<fynnashba@yahoo.com> wrote in message
news:cd38f8c4-6a5d-474f-9e32-e3ec4cfc8638@a1g2000hsb.googlegroups.com...

I'm working on a pal's IBM PII computer which was extremely slow so I
tried to format it but now I cannot boot from CD . I have check all
setup BIOS but nothing shows or states how to change the boot
sequence. Can anyone help pls.

More than likely it doesn't support boot from CD. That is a feature that was
not implemented in a lot of older computers. You need to boot it from a
floppy. Search online for win98 boot floppy or find the original win98 setup
floppy disk.

Mike

 

[Michael Kennedy]

<fynnashba@yahoo.com> wrote in message
news:cd38f8c4-6a5d-474f-9e32-e3ec4cfc8638@a1g2000hsb.googlegroups.com...

I'm working on a pal's IBM PII computer which was extremely slow so I
tried to format it but now I cannot boot from CD . I have check all
setup BIOS but nothing shows or states how to change the boot
sequence. Can anyone help pls.

More than likely it doesn't support boot from CD. That is a feature that was
not implemented in a lot of older computers. You need to boot it from a
floppy. Search online for win98 boot floppy or find the original win98 setup
floppy disk.

Mike

 

[Allodoxaphobia]

On Sun, 25 May 2008 12:22:22 -0700, Smitty Two wrote:

Any top-poster who doesn't
understand that is either pig-headed or a complete moron.

And, the most vociferous are _both_.

 

[Allodoxaphobia]

On Sun, 25 May 2008 12:22:22 -0700, Smitty Two wrote:

Any top-poster who doesn't
understand that is either pig-headed or a complete moron.

And, the most vociferous are _both_.

 

[bz]

"Michael A. Terrell" <mike.terrell@earthlink.net> wrote in
news:ga6dnbaeoLDlUaTVnZ2dnUVZ_hWdnZ2d@earthlink.com:

bz wrote:

"Michael A. Terrell" <mike.terrell@earthlink.net> wrote in
news:4837C7E0.C274726D@earthlink.net:

James Sweet wrote:

I'm in the US and I despise spam, more than one email address I've
had has been rendered useless by the enormous volume of spam that
makes it in. I've had much better luck since I switched to gmail and
set up a number of disposable email forwards through trashmail.net,
now whenever I start getting spam from one, I can just drop it and
switch to another.


I use 'Mailwasher' to bounce the garbage as undeliverable.

NO!!!!!
NEVER bounce mail unless you can _guarantee_ that it goes to the ACTUAL
sender!!!!


I look at the headers, and bounce it back when the IP address matches
the server name.

That IS correct and a responsible thing to do.

AUTOMATIC bounces, as done by some software, IS abusive, however.

I was getting over 2000 pieces of junk a week when I
started. It quickly dropped to less than a dozen, and some of those are
from zombies on broadband connections. By bouncing those, their ISP can
spot the problem and tell them to fix their computer, or close their
account. There are millions of bounce from bad or closed e-mail
accounts every day. Some of the spammers remove the bounces form their
lists.

Most don't care. They get paid by numbers sent not delivered!

The spam with 50 or more addresses in the headers is sent by
those who don't give a damn.

Many spam with only one address in the header are sent by those who don't
give a hoover.

I am down to less than a dozen bounces a week. Some domains are
blacklisted by me and my E-mail server, along with Mailwashers checks
the spamcop and other blacklists.

I see our mail server rejecting dozens each day, thanks to various RBLs
that we use. I maintain it to continue relaying mail targeting old email
server addresses. It forwards to our new e-mail addresses.





--
bz 73 de N5BZ k

please pardon my infinite ignorance, the set-of-things-I-do-not-know is an
infinite set.

bz+ser@ch100-5.chem.lsu.edu remove ch100-5 to avoid spam trap

 

[bz]

"Michael A. Terrell" <mike.terrell@earthlink.net> wrote in
news:ga6dnbaeoLDlUaTVnZ2dnUVZ_hWdnZ2d@earthlink.com:

bz wrote:

"Michael A. Terrell" <mike.terrell@earthlink.net> wrote in
news:4837C7E0.C274726D@earthlink.net:

James Sweet wrote:

I'm in the US and I despise spam, more than one email address I've
had has been rendered useless by the enormous volume of spam that
makes it in. I've had much better luck since I switched to gmail and
set up a number of disposable email forwards through trashmail.net,
now whenever I start getting spam from one, I can just drop it and
switch to another.


I use 'Mailwasher' to bounce the garbage as undeliverable.

NO!!!!!
NEVER bounce mail unless you can _guarantee_ that it goes to the ACTUAL
sender!!!!


I look at the headers, and bounce it back when the IP address matches
the server name.

That IS correct and a responsible thing to do.

AUTOMATIC bounces, as done by some software, IS abusive, however.

I was getting over 2000 pieces of junk a week when I
started. It quickly dropped to less than a dozen, and some of those are
from zombies on broadband connections. By bouncing those, their ISP can
spot the problem and tell them to fix their computer, or close their
account. There are millions of bounce from bad or closed e-mail
accounts every day. Some of the spammers remove the bounces form their
lists.

Most don't care. They get paid by numbers sent not delivered!

The spam with 50 or more addresses in the headers is sent by
those who don't give a damn.

Many spam with only one address in the header are sent by those who don't
give a hoover.

I am down to less than a dozen bounces a week. Some domains are
blacklisted by me and my E-mail server, along with Mailwashers checks
the spamcop and other blacklists.

I see our mail server rejecting dozens each day, thanks to various RBLs
that we use. I maintain it to continue relaying mail targeting old email
server addresses. It forwards to our new e-mail addresses.





--
bz 73 de N5BZ k

please pardon my infinite ignorance, the set-of-things-I-do-not-know is an
infinite set.

bz+ser@ch100-5.chem.lsu.edu remove ch100-5 to avoid spam trap

 

[David Lesher]

Bruce in Bangkok <decypher_signature@signature.line> writes:

All distribution transformers, sometimes called "pole pigs", that I
have seen had some sort of voltage adjusting system, usually referred
to as taps. Usually they are an actual bolted "tap" and you open the
transformer and set the output voltage by making the proper tap
connection when the transformer is installed and frankly it is usually
ignored thereafter.

The pole pigs here [7200v in/120-240 out] are fixed tap, I'm told. Saves
money. I think they are fused at 10A in. Older ones may have settable taps.

The other "cans" you often see on poles are capacitors used to adjust
the power factor on some secondaries.

Capacitors are in various places but we also have three 7200V line
regulators a block away, one on each primary phase. They are
auto-transformers, with allegedly auto-controlled tap changers, much as
the other poster described. [But his description is more complex than
I recall from the class covering same. The essential aspect was you
CAN short two taps together while switching; the inductance limits the
current change while you do..]

I say "allegedly" as twice now, the regulators have stuck and my UPS
woke me up at 2:30AM with notices it was disconnecting from the now-128v+
line. I solved the issue that night by putting a Variac in the line
ahead of it, and cranking it down.

It took multiple calls and finally PSC [oversight agency] complaints
to get PEPCO to fix the damn thing.

I envy EU houses. If we had regular 240V/30A+ outlets, I'd be able to
buy a snowblower with real guts. The 120v@15A ones are wimpy.
--
A host is a host from coast to coast.................wb8foz@nrk.com
& no one will talk to a host that's close........[v].(301) 56-LINUX
Unless the host (that isn't close).........................pob 1433
is busy, hung or dead....................................20915-1433

 

[David Lesher]

Bruce in Bangkok <decypher_signature@signature.line> writes:

All distribution transformers, sometimes called "pole pigs", that I
have seen had some sort of voltage adjusting system, usually referred
to as taps. Usually they are an actual bolted "tap" and you open the
transformer and set the output voltage by making the proper tap
connection when the transformer is installed and frankly it is usually
ignored thereafter.

The pole pigs here [7200v in/120-240 out] are fixed tap, I'm told. Saves
money. I think they are fused at 10A in. Older ones may have settable taps.

The other "cans" you often see on poles are capacitors used to adjust
the power factor on some secondaries.

Capacitors are in various places but we also have three 7200V line
regulators a block away, one on each primary phase. They are
auto-transformers, with allegedly auto-controlled tap changers, much as
the other poster described. [But his description is more complex than
I recall from the class covering same. The essential aspect was you
CAN short two taps together while switching; the inductance limits the
current change while you do..]

I say "allegedly" as twice now, the regulators have stuck and my UPS
woke me up at 2:30AM with notices it was disconnecting from the now-128v+
line. I solved the issue that night by putting a Variac in the line
ahead of it, and cranking it down.

It took multiple calls and finally PSC [oversight agency] complaints
to get PEPCO to fix the damn thing.

I envy EU houses. If we had regular 240V/30A+ outlets, I'd be able to
buy a snowblower with real guts. The 120v@15A ones are wimpy.
--
A host is a host from coast to coast.................wb8foz@nrk.com
& no one will talk to a host that's close........[v].(301) 56-LINUX
Unless the host (that isn't close).........................pob 1433
is busy, hung or dead....................................20915-1433

 

[bz]

Paul <paulguy@eastlink.ca> wrote in
news:8q3j34l2kvfott9cdtch11utdfdfm7fpij@4ax.com:

First, there are a lot of differences between pink antistatic bags!
they vary a lot in terms of what they are meant for, some are just for
NON-ESD sensitive components, and many are meant as ESD dissipative
bags.


Read this page
http://www.polypluspackaging.co.uk/anti-static-bags-material.php
It discusses which kind of bags you should use for different
applications. Notice that the low resistance ones are used for
shielding (Faraday cage), and the pink ones (dissipative - hi R) are
used to transport semiconductors.

The best bags to use are apparently the moisture resistant ones that have
an anti static [moderate conductive layer to avoid attracting sparks], a
highly conductive layer [Faraday shielding and good anti EMP shielding],
another other anti static layer [again to avoid sparking] and are heat
sealable and moisture proof. Pink bags are almost useless as are black bags
as they do not protect the contents from high voltage impulses near the
bag.


Nothing in ANY document I have seen so far says anything about a hazard due
to shorting the leads of an IC TOGETHER.

There is mention of discharging an INDUCED charge, via a leg during some of
the testing. The charge being induced in the assembly equipment by the
motion of the chips through the storage and assembly equipment.

One of the surprising 'reminders' [I should have remembered it from
physics] is that simply separating two conductors physically can induce a
charge. In other words, picking up a chip that has been laying on a
conductor or an insulator and lifting it vertically away from that surface
can create an electrical potential between the two objects unless they both
are grounded to a common point.

Thanks again for the interesting references.




--
bz

please pardon my infinite ignorance, the set-of-things-I-do-not-know is an
infinite set.

bz+spr@ch100-5.chem.lsu.edu remove ch100-5 to avoid spam trap

 

In alt.engineering.electrical David Lesher <wb8foz@panix.com> wrote:
| Bruce in Bangkok <decypher_signature@signature.line> writes:
|
|
|>All distribution transformers, sometimes called "pole pigs", that I
|>have seen had some sort of voltage adjusting system, usually referred
|>to as taps. Usually they are an actual bolted "tap" and you open the
|>transformer and set the output voltage by making the proper tap
|>connection when the transformer is installed and frankly it is usually
|>ignored thereafter.
|
| The pole pigs here [7200v in/120-240 out] are fixed tap, I'm told. Saves
| money. I think they are fused at 10A in. Older ones may have settable taps.
|
|>The other "cans" you often see on poles are capacitors used to adjust
|>the power factor on some secondaries.
|
| Capacitors are in various places but we also have three 7200V line
| regulators a block away, one on each primary phase. They are
| auto-transformers, with allegedly auto-controlled tap changers, much as
| the other poster described. [But his description is more complex than
| I recall from the class covering same. The essential aspect was you
| CAN short two taps together while switching; the inductance limits the
| current change while you do..]
|
| I say "allegedly" as twice now, the regulators have stuck and my UPS
| woke me up at 2:30AM with notices it was disconnecting from the now-128v+
| line. I solved the issue that night by putting a Variac in the line
| ahead of it, and cranking it down.
|
| It took multiple calls and finally PSC [oversight agency] complaints
| to get PEPCO to fix the damn thing.
|
| I envy EU houses. If we had regular 240V/30A+ outlets, I'd be able to
| buy a snowblower with real guts. The 120v@15A ones are wimpy.

So put one in.

--
|WARNING: Due to extreme spam, googlegroups.com is blocked. Due to ignorance |
| by the abuse department, bellsouth.net is blocked. If you post to |
| Usenet from these places, find another Usenet provider ASAP. |
| Phil Howard KA9WGN (email for humans: first name in lower case at ipal.net) |

 

In alt.engineering.electrical David Lesher <wb8foz@panix.com> wrote:
| Bruce in Bangkok <decypher_signature@signature.line> writes:
|
|
|>All distribution transformers, sometimes called "pole pigs", that I
|>have seen had some sort of voltage adjusting system, usually referred
|>to as taps. Usually they are an actual bolted "tap" and you open the
|>transformer and set the output voltage by making the proper tap
|>connection when the transformer is installed and frankly it is usually
|>ignored thereafter.
|
| The pole pigs here [7200v in/120-240 out] are fixed tap, I'm told. Saves
| money. I think they are fused at 10A in. Older ones may have settable taps.
|
|>The other "cans" you often see on poles are capacitors used to adjust
|>the power factor on some secondaries.
|
| Capacitors are in various places but we also have three 7200V line
| regulators a block away, one on each primary phase. They are
| auto-transformers, with allegedly auto-controlled tap changers, much as
| the other poster described. [But his description is more complex than
| I recall from the class covering same. The essential aspect was you
| CAN short two taps together while switching; the inductance limits the
| current change while you do..]
|
| I say "allegedly" as twice now, the regulators have stuck and my UPS
| woke me up at 2:30AM with notices it was disconnecting from the now-128v+
| line. I solved the issue that night by putting a Variac in the line
| ahead of it, and cranking it down.
|
| It took multiple calls and finally PSC [oversight agency] complaints
| to get PEPCO to fix the damn thing.
|
| I envy EU houses. If we had regular 240V/30A+ outlets, I'd be able to
| buy a snowblower with real guts. The 120v@15A ones are wimpy.

So put one in.

--
|WARNING: Due to extreme spam, googlegroups.com is blocked. Due to ignorance |
| by the abuse department, bellsouth.net is blocked. If you post to |
| Usenet from these places, find another Usenet provider ASAP. |
| Phil Howard KA9WGN (email for humans: first name in lower case at ipal.net) |

 

[gareth magennis]

"Michael Kennedy" <Mikek400@remthis.comcast.net> wrote in message
news:3ZmdnWrqFMgRf6TVnZ2dnUVZ_srinZ2d@comcast.com...

fynnashba@yahoo.com> wrote in message
news:cd38f8c4-6a5d-474f-9e32-e3ec4cfc8638@a1g2000hsb.googlegroups.com...
I'm working on a pal's IBM PII computer which was extremely slow so I
tried to format it but now I cannot boot from CD . I have check all
setup BIOS but nothing shows or states how to change the boot
sequence. Can anyone help pls.

More than likely it doesn't support boot from CD. That is a feature that
was not implemented in a lot of older computers. You need to boot it from
a floppy. Search online for win98 boot floppy or find the original win98
setup floppy disk.

Mike

Yep, that's how things used to be. In a clean machine there are no CDROM
drivers, so that's why you can't boot from it. The Win 98 floppys Mike
mentions install DOS routines and a generic CDROM driver. Amongst DOS is
FDISK for proper formatting and partitioning before installing Windows.
Your CDROM may now appear as an odd Letter, look carefully at the text on
screen, and you may notice it telling you that CDROM is drive R: or some
such random letter. Type R: to get onto the drive, then you can type Setup
and away you go.



Gareth.




>

 

[gareth magennis]

"Michael Kennedy" <Mikek400@remthis.comcast.net> wrote in message
news:3ZmdnWrqFMgRf6TVnZ2dnUVZ_srinZ2d@comcast.com...

fynnashba@yahoo.com> wrote in message
news:cd38f8c4-6a5d-474f-9e32-e3ec4cfc8638@a1g2000hsb.googlegroups.com...
I'm working on a pal's IBM PII computer which was extremely slow so I
tried to format it but now I cannot boot from CD . I have check all
setup BIOS but nothing shows or states how to change the boot
sequence. Can anyone help pls.

More than likely it doesn't support boot from CD. That is a feature that
was not implemented in a lot of older computers. You need to boot it from
a floppy. Search online for win98 boot floppy or find the original win98
setup floppy disk.

Mike

Yep, that's how things used to be. In a clean machine there are no CDROM
drivers, so that's why you can't boot from it. The Win 98 floppys Mike
mentions install DOS routines and a generic CDROM driver. Amongst DOS is
FDISK for proper formatting and partitioning before installing Windows.
Your CDROM may now appear as an odd Letter, look carefully at the text on
screen, and you may notice it telling you that CDROM is drive R: or some
such random letter. Type R: to get onto the drive, then you can type Setup
and away you go.



Gareth.




>

 

[gareth magennis]

"gareth magennis" <gareth.magennis@ntlworld.com> wrote in message
news:1Ev_j.8756$Ex2.7778@newsfe12.ams2...

"Michael Kennedy" <Mikek400@remthis.comcast.net> wrote in message
news:3ZmdnWrqFMgRf6TVnZ2dnUVZ_srinZ2d@comcast.com...

fynnashba@yahoo.com> wrote in message
news:cd38f8c4-6a5d-474f-9e32-e3ec4cfc8638@a1g2000hsb.googlegroups.com...
I'm working on a pal's IBM PII computer which was extremely slow so I
tried to format it but now I cannot boot from CD . I have check all
setup BIOS but nothing shows or states how to change the boot
sequence. Can anyone help pls.

More than likely it doesn't support boot from CD. That is a feature that
was not implemented in a lot of older computers. You need to boot it from
a floppy. Search online for win98 boot floppy or find the original win98
setup floppy disk.

Mike



Yep, that's how things used to be. In a clean machine there are no CDROM
drivers, so that's why you can't boot from it. The Win 98 floppys Mike
mentions install DOS routines and a generic CDROM driver. Amongst DOS is
FDISK for proper formatting and partitioning before installing Windows.
Your CDROM may now appear as an odd Letter, look carefully at the text on
screen, and you may notice it telling you that CDROM is drive R: or some
such random letter. Type R: to get onto the drive, then you can type
Setup and away you go.



Gareth.

Just a warning - last time I downloaded floppy boot disks from the Interweb,
most of them (95 and 98) wouldn't work, don't know why. Could just have been
my PC or the disks. Anyway I have one here that definately installs Win98
so if you have any bother I can email you a copy.



Gareth.

 

[gareth magennis]

"gareth magennis" <gareth.magennis@ntlworld.com> wrote in message
news:1Ev_j.8756$Ex2.7778@newsfe12.ams2...

"Michael Kennedy" <Mikek400@remthis.comcast.net> wrote in message
news:3ZmdnWrqFMgRf6TVnZ2dnUVZ_srinZ2d@comcast.com...

fynnashba@yahoo.com> wrote in message
news:cd38f8c4-6a5d-474f-9e32-e3ec4cfc8638@a1g2000hsb.googlegroups.com...
I'm working on a pal's IBM PII computer which was extremely slow so I
tried to format it but now I cannot boot from CD . I have check all
setup BIOS but nothing shows or states how to change the boot
sequence. Can anyone help pls.

More than likely it doesn't support boot from CD. That is a feature that
was not implemented in a lot of older computers. You need to boot it from
a floppy. Search online for win98 boot floppy or find the original win98
setup floppy disk.

Mike



Yep, that's how things used to be. In a clean machine there are no CDROM
drivers, so that's why you can't boot from it. The Win 98 floppys Mike
mentions install DOS routines and a generic CDROM driver. Amongst DOS is
FDISK for proper formatting and partitioning before installing Windows.
Your CDROM may now appear as an odd Letter, look carefully at the text on
screen, and you may notice it telling you that CDROM is drive R: or some
such random letter. Type R: to get onto the drive, then you can type
Setup and away you go.



Gareth.

Just a warning - last time I downloaded floppy boot disks from the Interweb,
most of them (95 and 98) wouldn't work, don't know why. Could just have been
my PC or the disks. Anyway I have one here that definately installs Win98
so if you have any bother I can email you a copy.



Gareth.

 

[William Sommerwerck]

I can think of reasons for not having a foil-covered bench, but rapid
discharge of static potentials isn't one of them.

I've wrapped ICs in aluminum foil when necessary, and never had any problem.

I'd agree that conductive foam is the best way to store ICs.