(Topic ID: 95488)

Can these twist-on lamp contacts on light board be fixed?


By jibmums

6 years ago



Topic Stats

  • 6 posts
  • 5 Pinsiders participating
  • Latest reply 6 years ago by barakandl
  • Topic is favorited by 1 Pinsider

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#1 6 years ago

First issue on my cheapie Simpsons to tackle. Somehow, some liquid must have managed to get onto one of the under-playfield light boards and damage the lamp contacts. I cleaned off the dirt and weird rainbow-iridescent residue, and I can buy new twist-on sockets, but can these contacts be fixed or do I need to hunt down a new board?

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#2 6 years ago

try cleaning with 91% alcohol. then reflow all pads and header pins. g.l. joe

#3 6 years ago

First thing I did was hit it with the alcohol. What exactly is involved in reflowing (he asks ignorantly, never have done it before), do I just hit the existing solder with a hot iron until it melts and looks shiny again, or is there more to it than that?

#4 6 years ago

Suck off the old Solder and then add new Solder evenly across the metal contact surface. This will give more grip/contact area for the socket tabs. Reflow the solder on the connector pins too.

#5 6 years ago
Quoted from SealClubber:

Suck off the old Solder and then add new Solder evenly across the metal contact surface. This will give more grip/contact area for the socket tabs. Reflow the solder on the connector pins too.

Ditto.
http://www.pinwiki.com/wiki/index.php?title=Williams_System_9_-_11#Lamp_Boards
--
Chris Hibler - CARGPB #31
http://www.Team-EM.com
http://webpages.charter.net/chibler/Pinball/index.htm
http://www.PinWiki.com - The Place to go for Pinball Repair Info

#6 6 years ago

If you have a hakko desoldering gun. You can use this to recoat those pads quickly. Run the pump while gently moving the tip across. Make sure to clean the flux off with naptha. Otherwise if you are quick with an iron and damp rag, you can wipe off the excess solder while still hot which leaves a nice smooth fresh coat. Again still need to clean flux off. The 2nd technique takes some practice. You can refinish card edge connectors in the same ways.

If you have trouble with the solder because of corrosion, a light rough up with a wire brush or sand paper can help get soldering started.

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