Memory Lane
Stern Electronics, 1978There have been 2 images uploaded to this topic. (View topic image gallery).
You're currently viewing posts by Pinsider quench.
Click here to go back to viewing the entire thread.
The state of the overvoltage LED is based on the relationship between the 5V and 12V power rails at the MPU board. It can and more than likely in your case is coming on because your 12V is low.
Post the actual voltages you measured.
Quoted from westofrome:
I am only getting ~3VDC on the Altek MPU TP1 and TP4
...
In any case, I'm going to begin repinning.
Have you first determined if your solenoid driver board is outputting 5 volts DC? Before repinning anything find the source of the voltage loss/drop.
You're currently viewing posts by Pinsider quench.
Click here to go back to viewing the entire thread.
Great to see you're enjoying Pinside! Did you know Pinside is able to run thanks to donations from our visitors? Please donate to Pinside, support the site and get anext to your username to show for it! Donate to Pinside
