1BillSacto
New member
Hi,
I hope someone can help me figure this out. I just picked up an Atari Atarians and it works fine except... when the flippers are energized and held energized- the solenoids start to pulse, off/on once per second for about a 1/4 second. I traced the circuit back through the drive transistor, through buffer, back to a 9334 Addressable Latch. The signal out of this latch, going to the solenoid (Q0) is a square wave, 60ish Hz @ around 10mv. I don't get this...
I don't understand what is causing the solenoids to pulse this way. It doesn't seem to me that it could be related to the signal I found at the 9334 (60 Hz). But I don't really understand that signal either.
Thanks for the help!
Bill
I hope someone can help me figure this out. I just picked up an Atari Atarians and it works fine except... when the flippers are energized and held energized- the solenoids start to pulse, off/on once per second for about a 1/4 second. I traced the circuit back through the drive transistor, through buffer, back to a 9334 Addressable Latch. The signal out of this latch, going to the solenoid (Q0) is a square wave, 60ish Hz @ around 10mv. I don't get this...
I don't understand what is causing the solenoids to pulse this way. It doesn't seem to me that it could be related to the signal I found at the 9334 (60 Hz). But I don't really understand that signal either.
Thanks for the help!
Bill