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NASTY TAF ISSUE

Judge Dreads

Judge Dreads

Site Supporter
10 Years
Joined
Jul 21, 2011
Messages
2,313
Location
Y Felinheli
TAF.jpg

Recently fitted a serviced CPU board and reinstalled the playfield into my TAF only to find a nasty smell and F112 blow, machine is now dead in the water, this is sinister, fuse does not blow with J102 disconnected and it should be obvious why from the pic, the power cables have all melted together, red and blue/white stripe, this is a first and a new fault for me, pointers welcomed, thought I would post on here as it illustrates that a faulty machine could potentially cause a fire or even worse :(.
 
Can be caused if that connector is missing its key, and plugged over one place.
 
Hard to tell from your pictures, but that connector is usually connected to the power board to the connector below the one marked secondary. If you've had them unplugged, check you've got them back in the right placed.
 
J901 1 and 2 of the little board are the power input. All other pins are tied to ground. So the blue wires from the transformer are dead short.
 
Cheers Andy for all the info, I will buy a fire extinguisher before I meddle with it, got a feeling that the molex is keyed and thus will only go in one way, machine is not here so can't investigate but will report back when I have more info, I will need to replace the melted wires etc before anything else, would this have killed anything on that driver board or would you guess that trusty old F112 did it's duty, I appreciate at best it would be conjecture.

I get what you are saying, it does look like I have managed to mix them up in haste + it is a dark shed, it would be pretty damn unlucky for both molex plugs to be missing the key stopper which would allow a swap error.
 
I guess the connectors are keyed the same. It is possible. Keys cannot be relied upon to be unique.

The driver is probably ok. The loom may we'll be melted all the way back to the transformer though.
 
Cheers again, the old faithful is 25 miles away, may make the journey over tomorrow to see if I have been a Homer Simpson or not, just looking at the 2 blocks, they are different sizes and just checked my WH20 which are keyed so impossible to swap, it would be a pretty serious senior moment to get those mixed up :confused: but I did try to open the front door to my house with the central locking fob the other week so anything is possible :D
 
You're missing my point. You've plugged the secondary from the transformer into the small PCb when it should be connected to the large PCb. The connector which is just out of the bottom of your shot in the picture.
 
pinballmania said:
You're missing my point. You've plugged the secondary from the transformer into the small PCb when it should be connected to the large PCb. The connector which is just out of the bottom of your shot in the picture.
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yup I am aware of this (deffo a balls up and a lesson), with a bit of luck I can make time to investigate the loom etc tomorrow, my bad due to being complacent and just throwing it back together quick because I have done it so many times before, 9.5 times out of 10 there is no issue and no mix up but it goes to show you can never be too cocky and should always be vigilant, as you rightly pointed out, keys may not always save your bacon.
 
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My mum should have bought me Stickle Bricks or Lego instead of that colouring book :D.
 
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Yup, Andy was right, wires had melted all the way back to the transformer :mad:, replaced these, board now powers up but machine is still dead, that's as far as I got due to location and time (nothing is easy with the old style centre pivot playfields), this is now on hold until further notice.

Transormer makes a clank when you fire it up.
 
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