Gottlieb Caveman: Stops accepting inputs after game start
Hey guys. I got a Gottlieb Caveman in a couple weeks ago. It's been a neat one, but I've come to an issue that is out of my knowledge.
The video explains most of it, but here's the repair history:
1. Won't power on > bad fuses and shorted components in the PSU.
2. Won't boot > bad connectors, and no 5V to 6502, then reset low from corrosion.
3. Won't accept inputs > corrosion on input resistors / capacitors.
4. Inputs not making it to U4 > Bad z13, z14, and z12
5. RIOT U4 not communicating with data bus > Bad z10 not toggling ^BAB9, but oddly enough driving BAB9. Guess it was a shorted input on z10.
7. Game now passes test modes. I have tested ROMs, RAMs, and RIOTs and are known good.
What it's doing is not accepting inputs, additional players, or scoring after start is pressed, and video module will never leave attract. Video module will not go into test mode. I don't think I'm getting proper game sounds either.
Also, game will not accept inputs unless DIP 6,7,8 are ON. I don't know if this is weird or normal. I don't have the manual, but I do have the DIP page, and it's not helpful. I have tested all the dip switches and they are working properly, and their diodes are good.
My theory is that A1 and the video module are not communicating properly, but I have little knowledge about this.
Video:
https://youtu.be/-S-oIWXyKfI
Ah yes and I have checked my tilt switches. They are open and the slam switch is closed and they all work. Tilt does not work after the game mode starts, but the slam switch does.
Thanks in advance!
-GB
Hey guys. I got a Gottlieb Caveman in a couple weeks ago. It's been a neat one, but I've come to an issue that is out of my knowledge.
The video explains most of it, but here's the repair history:
1. Won't power on > bad fuses and shorted components in the PSU.
2. Won't boot > bad connectors, and no 5V to 6502, then reset low from corrosion.
3. Won't accept inputs > corrosion on input resistors / capacitors.
4. Inputs not making it to U4 > Bad z13, z14, and z12
5. RIOT U4 not communicating with data bus > Bad z10 not toggling ^BAB9, but oddly enough driving BAB9. Guess it was a shorted input on z10.
7. Game now passes test modes. I have tested ROMs, RAMs, and RIOTs and are known good.
What it's doing is not accepting inputs, additional players, or scoring after start is pressed, and video module will never leave attract. Video module will not go into test mode. I don't think I'm getting proper game sounds either.
Also, game will not accept inputs unless DIP 6,7,8 are ON. I don't know if this is weird or normal. I don't have the manual, but I do have the DIP page, and it's not helpful. I have tested all the dip switches and they are working properly, and their diodes are good.
My theory is that A1 and the video module are not communicating properly, but I have little knowledge about this.
Video:
https://youtu.be/-S-oIWXyKfI
Ah yes and I have checked my tilt switches. They are open and the slam switch is closed and they all work. Tilt does not work after the game mode starts, but the slam switch does.
Thanks in advance!
-GB
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