Tech: Demo Man Magnet Broken Error

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On Tuesday, October 26, 2021 at 3:11:37 PM UTC-7, John Robertson wrote:

I disconnected the leads to the magnet lugs and it reads 99 ohms.

So if I am reading this correctly, that would mean the magnet is ok. Hard to believe a magnet would go bad, but I suppose it happens.

I swapped out the Fliptronics II board with a brand new one, and no change..

Appreciate both you gents very much for weighing in on this....

[LexingtonVAPin]

Post by ***@gmail.com
I disconnected the leads to the magnet lugs and it reads 99 ohms.
So if I am reading this correctly, that would mean the magnet is ok. Hard to believe a magnet would go bad, but I suppose it happens.
I swapped out the Fliptronics II board with a brand new one, and no change..
Appreciate both you gents very much for weighing in on this....

The sound you hear is me going "wow, and I guessed 100 ohms"!

That coil is good.

I am guessing that if you find the reason that there is not 50 V DC on
that coil, you will solve the problem. I suspect that fuse is blown.
If Q2 and Q8 are good, I don't know why the fuse would blow. Even if
the coil locked on, 50 V / 100 ohms is only 0.5A. The fuse is 3A SB.

[[e-mail]]

Post by LexingtonVAPin

Post by ***@gmail.com
I disconnected the leads to the magnet lugs and it reads 99 ohms.
So if I am reading this correctly, that would mean the magnet is ok. Hard to believe a magnet would go bad, but I suppose it happens.
I swapped out the Fliptronics II board with a brand new one, and no change..
Appreciate both you gents very much for weighing in on this....

The sound you hear is me going "wow, and I guessed 100 ohms"!
That coil is good.
I am guessing that if you find the reason that there is not 50 V DC on
that coil, you will solve the problem. I suspect that fuse is blown.
If Q2 and Q8 are good, I don't know why the fuse would blow. Even if
the coil locked on, 50 V / 100 ohms is only 0.5A. The fuse is 3A SB.
--
http://orcalcoast.com/

Yes sir - awesome guess!

As mentioned, fuses are good so somewhere there is a break. I will report back.

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Thank you Lex and John for responding, you set me on the right path!

Here is the resolution:

It ultimately wound up being a bad opto pair at SW. 74 Elevator Hold. What threw me was it was intermittent and appeared to be working fine, but by process of elimination I got there and found the emitter was flakey. I replaced the pair and voila: No magnet error, and claw/elevator/magnet function is 100%!

Bottom line: The magnet broken error had absolutely nothing to do with the magnet being broken - it was fine.

If you have a bad opto @ SW. 74, the game will throw a magnet broken error.

[[e-mail]]

Post by ***@gmail.com
Thank you Lex and John for responding, you set me on the right path!
It ultimately wound up being a bad opto pair at SW. 74 Elevator Hold. What threw me was it was intermittent and appeared to be working fine, but by process of elimination I got there and found the emitter was flakey. I replaced the pair and voila: No magnet error, and claw/elevator/magnet function is 100%!
Bottom line: The magnet broken error had absolutely nothing to do with the magnet being broken - it was fine.

Epilogue: ALSO! While you have the Elevator Assy off the game, reflow all the connections on the PCB on the bottom of the assy, and also nix that Z connector!