Outdoor School Sign LED

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

On 04/30/2009 06:36 PM, Bob AZ sent:

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

letters

got

probably

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

On Thu, 30 Apr 2009 18:36:31 -0700 (PDT), Bob AZ put finger to keyboard and composed:

Here is a scoreboard kit:

The article is pay-for-view, but here are some pictures:

- Franc Zabkar

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

Gareth.

Yeah, I hate to say it, but that's being *very* optimistic.