Hello,
I recently bought a non-working Ms. Pacman and was able to get it partly working by replacing 74LS74 in 8C.
It plays correctly, but the letters and maze are distorted (see attached for intro screen and screen in play). Even the letters for the test mode are distorted and I can't read them.
I already removed the ribbon cable and put the Z80 on the main board to rule that out. Also, the small glass capacitor for C14 was broken in half, so I replaced that with a .1uf 400V that I had. Didn't make a difference. I'm not sure what C14 is supposed to be.
Any ideas on what to check next?
Thanks!
Matt
I recently bought a non-working Ms. Pacman and was able to get it partly working by replacing 74LS74 in 8C.
It plays correctly, but the letters and maze are distorted (see attached for intro screen and screen in play). Even the letters for the test mode are distorted and I can't read them.
I already removed the ribbon cable and put the Z80 on the main board to rule that out. Also, the small glass capacitor for C14 was broken in half, so I replaced that with a .1uf 400V that I had. Didn't make a difference. I'm not sure what C14 is supposed to be.
Any ideas on what to check next?
Thanks!
Matt

