Smoked my Donkey Kong Jr. board

Braido

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Ok,

I have two Donkey kong's and a Donkey Jr. and one of the DK and the DKjr. needed work done to the monitor boards. I fixed them up and put a new flyback on one did a cap kit etc... in error i went and hooked up the Donkey Kong monitor board... into the DKjr cabinet! It smoked my board, Can't believe it!

I was suprised this happened they looked exactly the same to me, anyone else have this problem? Has anyone else smoked a board before this was my 1st one. I think just a couple of the caps got hot but haven't took the time yet to see. How bad are they usually after something like this happens?
 
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If both your DK and DK Jr. cabs utilize Sanyo 20EZ chassis, they should be interchangeable.

Did you check the polarity of you caps? If the polarity is flip-flopped your some of your caps may have blown. Maybe you put a cap with a different uF and voltage rating in a location on the chassis other than you intended? If the caps are blown you will need new ones. Check this for starters.
 
Sorry Braido; I must have misunderstood. I was under the impression something on your monitor board blew, not your game board >_<
 
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Sorry too. I was under the impression he took the board and crushed it then rolled it and smoked his dk2 board....................
 
Don't feel bad, many others have made this mistake.

I did the same thing to two boards but it mainly smokes one resistor near the top leftish of the PCB if you shut down your machine fast enough. The problem was indeed flipping the two non-keyed plugs on the sound amp board on the monitor chassis (as another member in this post pointed out).
 
Sorry Braido; I must have misunderstood. I was under the impression something on your monitor board blew, not your game board >_<

Both are correct, it was my monitor board that i repaired and put back in the machine and when i hooked it all back up it smoked the game board. I haven't tried the other board yet and won't till i get a better idea of what happened. The two connectors are marked i did that with a black sharpie before i took it apart. I think it's something to do with a sound connector that i put on the wrong connector located on the game board, but i'm not sure.

Thanks for the responses so far,

Braido...
 
Don't feel bad, many others have made this mistake.

I did the same thing to two boards but it mainly smokes one resistor near the top leftish of the PCB if you shut down your machine fast enough. The problem was indeed flipping the two non-keyed plugs on the sound amp board on the monitor chassis (as another member in this post pointed out).

It did look to me like that one resistor, like you said near the top leftish. I shut it down instantly. I haven't had time to look yet but i hope there isn't much damage, im still learning this stuff.
 
If you are using the seperate power cables instead of the edge connector, it is easy to put the wrong cable on the Video pcb side connector. I'm not in front of a machine right to list specific headers, but you need to ensure you didn't do this - double check your connections. Been there and done that ;)

Also - the monitor is an input device. Never say never but I SEVERLY doubt your monitor chassis blew up the PCB.
 
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