Outdoor School Sign LED
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 |
Outdoor School Sign LED
Bob AZ wrote in message
... 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/ |
Outdoor School Sign LED
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. 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] |
Outdoor School Sign LED
N_Cook wrote in message
... Bob AZ wrote in message ... 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/ 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/ |
Outdoor School Sign LED
On Thu, 30 Apr 2009 18:36:31 -0700 (PDT), Bob AZ
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 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/st...103978_8mg.jpg http://us1.webpublications.com.au/st...103978_6mg.jpg http://us1.webpublications.com.au/st...103978_3mg.jpg http://us1.webpublications.com.au/st...103978_4mg.jpg http://us1.webpublications.com.au/st...103978_5mg.jpg http://us1.webpublications.com.au/st...103978_7mg.jpg http://us1.webpublications.com.au/st...103978_2mg.jpg http://us1.webpublications.com.au/st...103978_9mg.jpg - Franc Zabkar -- Please remove one 'i' from my address when replying by email. |
Outdoor School Sign LED
"1PW" wrote in message ... 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. Gareth. |
Outdoor School Sign LED
Gareth Magennis wrote:
"1PW" wrote in message ... 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. 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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