Outdoor School Sign LED

B

Bob AZ

Guest
Got a call to fix an Outdoor LED School Sign. Never worked on one and
need to get smart about them.

The sign is outdoor of course and has a computer to program it from
inside in the office. Apparently the computer and monitor works well
but the sign is only half there. Not sure which half. Sign is 4 years
old.

Any input will be appreciated.

Thanks
Bob AZ
 
Bob AZ <rwatson767@aol.com> wrote in message
news:dfe9ff49-4472-4eb1-b3df-9e7696711f53@i28g2000prd.googlegroups.com...
Got a call to fix an Outdoor LED School Sign. Never worked on one and
need to get smart about them.

The sign is outdoor of course and has a computer to program it from
inside in the office. Apparently the computer and monitor works well
but the sign is only half there. Not sure which half. Sign is 4 years
old.

Any input will be appreciated.

Thanks
Bob AZ
Click to expand...

I tried repairing one where damp air had got inside and corroded pins ,
mainly on the data line expander chip , inside the sign. So parts of letters
were missing. Removing the big chip , abraiding pins, and soldering to an
intermediary turned pn socket worked for a year or so and then corrosion got
down inside the encapsulation - could not find a direct pin for pin
replacement, but with some research a functional replacement could probably
have been found.


--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/
 
On 04/30/2009 06:36 PM, Bob AZ sent:
Got a call to fix an Outdoor LED School Sign. Never worked on one and
need to get smart about them.

The sign is outdoor of course and has a computer to program it from
inside in the office. Apparently the computer and monitor works well
but the sign is only half there. Not sure which half. Sign is 4 years
old.

Any input will be appreciated.

Thanks
Bob AZ
Click to expand...
Hello Bob:

Hopefully the manufacturer and installer was tech manuals that'll still
be there along with a phone number for support if unique parts are needed.

Suspect a power supply failure, vandalism, or moisture intrusion.

Please update us with your progress. Good luck.

Pete
--
1PW @?6A62?FEH9:DE=6o2@=]4@> [r4o7t]
 
N_Cook <diverse@tcp.co.uk> wrote in message
news:gte5cb$v7s$1@news.motzarella.org...
Bob AZ <rwatson767@aol.com> wrote in message
news:dfe9ff49-4472-4eb1-b3df-9e7696711f53@i28g2000prd.googlegroups.com...
Got a call to fix an Outdoor LED School Sign. Never worked on one and
need to get smart about them.

The sign is outdoor of course and has a computer to program it from
inside in the office. Apparently the computer and monitor works well
but the sign is only half there. Not sure which half. Sign is 4 years
old.

Any input will be appreciated.

Thanks
Bob AZ


I tried repairing one where damp air had got inside and corroded pins ,
mainly on the data line expander chip , inside the sign. So parts of
letters
were missing. Removing the big chip , abraiding pins, and soldering to an
intermediary turned pn socket worked for a year or so and then corrosion
got
down inside the encapsulation - could not find a direct pin for pin
replacement, but with some research a functional replacement could
probably
have been found.


--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/
Click to expand...

By expander I think it was something like expanding 8 data lines from the
serial
receiver up to 96 lines for 80 columns and 16 rows or whatever the matrix
was, so sometimes column/s would be missing and sometimes row/s missing


--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/
 
On Thu, 30 Apr 2009 18:36:31 -0700 (PDT), Bob AZ <rwatson767@aol.com>
put finger to keyboard and composed:

Got a call to fix an Outdoor LED School Sign. Never worked on one and
need to get smart about them.

The sign is outdoor of course and has a computer to program it from
inside in the office. Apparently the computer and monitor works well
but the sign is only half there. Not sure which half. Sign is 4 years
old.

Any input will be appreciated.

Thanks
Bob AZ
Click to expand...
Here is a scoreboard kit:
http://www.siliconchip.com.au/cms/A_103978/article.html

The article is pay-for-view, but here are some pictures:
http://us1.webpublications.com.au/static/images/articles/i1039/103978_8mg.jpg
http://us1.webpublications.com.au/static/images/articles/i1039/103978_6mg.jpg
http://us1.webpublications.com.au/static/images/articles/i1039/103978_3mg.jpg
http://us1.webpublications.com.au/static/images/articles/i1039/103978_4mg.jpg
http://us1.webpublications.com.au/static/images/articles/i1039/103978_5mg.jpg
http://us1.webpublications.com.au/static/images/articles/i1039/103978_7mg.jpg
http://us1.webpublications.com.au/static/images/articles/i1039/103978_2mg.jpg
http://us1.webpublications.com.au/static/images/articles/i1039/103978_9mg.jpg

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.
 
"1PW" <barcrnahgjuvfgyr@nby.pbz> wrote in message
news:gte6ej$5h8$1@news.motzarella.org...
On 04/30/2009 06:36 PM, Bob AZ sent:
Got a call to fix an Outdoor LED School Sign. Never worked on one and
need to get smart about them.

The sign is outdoor of course and has a computer to program it from
inside in the office. Apparently the computer and monitor works well
but the sign is only half there. Not sure which half. Sign is 4 years
old.

Any input will be appreciated.

Thanks
Bob AZ

Hello Bob:

Hopefully the manufacturer and installer was tech manuals that'll still
be there along with a phone number for support if unique parts are needed.
Click to expand...

Sounds a bit hopeful to me. This is the real world.



Gareth.
 
Gareth Magennis wrote:
"1PW" <barcrnahgjuvfgyr@nby.pbz> wrote in message
news:gte6ej$5h8$1@news.motzarella.org...
On 04/30/2009 06:36 PM, Bob AZ sent:
Got a call to fix an Outdoor LED School Sign. Never worked on one and
need to get smart about them.

The sign is outdoor of course and has a computer to program it from
inside in the office. Apparently the computer and monitor works well
but the sign is only half there. Not sure which half. Sign is 4 years
old.

Any input will be appreciated.

Thanks
Bob AZ
Hello Bob:

Hopefully the manufacturer and installer was tech manuals that'll still
be there along with a phone number for support if unique parts are needed.


Sounds a bit hopeful to me. This is the real world.
Click to expand...
Yeah, I hate to say it, but that's being *very* optimistic.

--
W
. | ,. w , "Some people are alive only because
\|/ \|/ it is illegal to kill them." Perna condita delenda est
---^----^---------------------------------------------------------------
 
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