modessitt
Volunteer: Encyclopedia Submission Moderator
I had no lights, even though the bulbs were good. I replaced all of the PN2222A's with TIP122's (doing the leg twist to match BCE pinout of the PN2222A) and now my bulbs light but they don't sequence in test.
I've had this problem before, and we thought it was the PROM on the light sequencer. We were never able to find a way to get a new PROM to see if this was the case. As it is a very small chip (7603), and the fact that I don't know if anyone has even dumped the file, I'm not sure how or whether it can be replaced easily.
Anyone have any thoughts?
I've had this problem before, and we thought it was the PROM on the light sequencer. We were never able to find a way to get a new PROM to see if this was the case. As it is a very small chip (7603), and the fact that I don't know if anyone has even dumped the file, I'm not sure how or whether it can be replaced easily.
Anyone have any thoughts?
