Pinball Wizard Well-known member VAPS Joined Sep 20, 2010 Messages 3,084 Reaction score 407 Location Baltimore, Maryland Nov 12, 2011 #1 What is the huge (40 pin?) chip on the optical encoder for the spinner? I had a nick in my wiring harness and it shorted something out and burned a nice hole in that chip!
What is the huge (40 pin?) chip on the optical encoder for the spinner? I had a nick in my wiring harness and it shorted something out and burned a nice hole in that chip!
Riptor Well-known member VAPS Joined Jul 10, 2007 Messages 12,078 Reaction score 144 Location Leonartown, Maryland Nov 12, 2011 #2 There is not a 40 pin chip on it, its 24 pin. Its a 74LS491. If you need one I have them in my store, I also sell the complete pcb. http://www.twistywristarcade.com/bally-midway/637-reproduction-tron-optical-encoder-pcb.html http://www.twistywristarcade.com/74ls-ttl/634-74ls491.html Last edited: Nov 12, 2011
There is not a 40 pin chip on it, its 24 pin. Its a 74LS491. If you need one I have them in my store, I also sell the complete pcb. http://www.twistywristarcade.com/bally-midway/637-reproduction-tron-optical-encoder-pcb.html http://www.twistywristarcade.com/74ls-ttl/634-74ls491.html
OP OP Pinball Wizard Well-known member VAPS Joined Sep 20, 2010 Messages 3,084 Reaction score 407 Location Baltimore, Maryland Nov 13, 2011 #3 Oh didn't remember the chip being only 24 pins but it has been over a month since I've seen the chip. Thanks for the info!
Oh didn't remember the chip being only 24 pins but it has been over a month since I've seen the chip. Thanks for the info!
OP OP Pinball Wizard Well-known member VAPS Joined Sep 20, 2010 Messages 3,084 Reaction score 407 Location Baltimore, Maryland Nov 26, 2011 #4 Just an update, it was indeed the 24 pin chip, ordered it from Riptor and installed tonight, and Tron is back up and running!
Just an update, it was indeed the 24 pin chip, ordered it from Riptor and installed tonight, and Tron is back up and running!