(Topic ID: 254829)

No Fear - Ball trough opto issue

By Arcade

4 years ago


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#7 4 years ago
Quoted from Arcade:

Just tested and looked at them all.
Well since there are only 3 it was really easy. All the switches in the column are trough optos in the same board and they are working great.
The only other 3 switches are, plumb bob,
Left wire form and left ramp. They are all wired correctly and test great in switch test.
I can’t believe that one of the new optos I installed are bad but maybe that is it.
I can’t find my little opto light test card right now and putting my phone camera on any of them shows nothing.

You can test the receiver by shining an incandescent lamp at it. This way you can verify if half of the circuit is working. Do you have the correct voltages at the problematic optos?

#14 4 years ago
Quoted from PinballManiac40:

Different manufacturers make them differently. I normally change all the transmitters in my games as they burn out since they are on all the time while the game is on. Those others do have black spots on them so they will burn out eventually.
If you dont see it on, then it is likely installed backwards. With power off make sure you test to see if there it measures zero ohms across it. If so then you had too much solder flow up the legs and created a solder short under the part.

It looks backwards to me. You can see the flat edge of the opto facing upwards whereas the silkscreen on the board indicates it should point downwards.

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