(Topic ID: 307603)

Stern Power Distro Board Info Needed

By BozoTheClown

2 years ago


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#13 2 years ago
Quoted from barakandl:

If you install JP1 and R8, both zero ohm, I think that will disable the coin door interlock circuit. DO THIS AT YOUR OWN RISK, JUST MY GUESS FROM GLANCING AT SCHEMATIC.

That is correct.
I did this with a Game of Thrones that had no doorswitch and customer had received different model , so with the jumper J1 installed, this circuit (U3 U4) is overruled and 'VBBGOOD'-signal (generated at U2) is send to compter again

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#15 2 years ago

Yes, you could use a wire. It will then bypass R5, which is the current limiter.
R8 should only be used when optocoupler U2 is not present or has failed. With R8 ( 0 ohm) installed, the door status is always closed.

With that said, "door open" detection should still work without the blown R5 (2.2 ohm), so that could indicate more is going on. Maybe U3 and U4 have failed too by inverting CN5.

#19 2 years ago

Was the machine fully operational before the software update ? Just to exclude the hardware

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