Wpc red hot connector j115, scorched j121

[DRD]

My 1990 funhouse is one the first of the wpc generation of games.

The game works, but has an extremely hot J115 connector, the plug is quite scorched as per the photo. The really hot pin then goes to one of the gi power transistors with the huge heat sinks on



J121 is gi and also a bit scorched. So i guess that leds will take some of the problem away here ?



Do people know what might be causing this and what the cure might be

Thanks

 

[Spandangler]

My thoughts are that the header pins have become so hot in the past they have corrosion on them causing high resistance. Replace the header pins and put a new connector on and it will probably sort it.

 

[Moonraker]

Pretty standard for and older B/W machine and DE for that matter. http://www.pinwiki.com/wiki/index.php?title=Williams_WPC#General_Illumination_Problems

 

[mark9]

Didn't they change J115 to a higher temperature resistant black connector in later WPC machine because of this?

No doubt was caused by being switched on all day while on site. Wouldn't have happened with LED's.

 

[replicas]

Doesn't look to bad to me , I have seen a lot worse.
Change both connecters and in the home use environment it will be fine.
Common fault for a operated machine turned on all day.

 

[lukewells]

As others have said it's normal. Make sure to replace the header when replacing the cable housings. Also make sure to use trifurcon pins on the cable side. If you use those, under home use conditions, it is unlikely to happen again

 

[DRD]

Thanks for the tips. I removed the board. Reflowed solder on all the pins. Cleaned all pins with fine wet and dry paper.

Replaced the single brown female pin in the fried connector with a spare as a temp replacement. Running much cooler now

Where is cost effective to buy the trifurcon female connectors, plastic housing and board pins pls ? I have the crimping tool

 

[Paul]

@pinballmania - Andy Stocks them

 

[lukewells]

Cleaned all pins with fine wet and dry paper.

You really need to replace the pins, else they are only going to corrode and get hot again. Sanding them is just removing the plating

 

[DRD]

How do you manage to solder them on both sides pls ?

 

[Arv]

Get some nice molex connectors on there

 

[DRD]

Thanks