Return of the Jedi ROTJ PCB Character Sprite Issue

[Torin]

I have an issue with the character sprites having lines through them. Does anyone know which section of the schematics are responsible for this? I have linked the schematics below as well as a video of what is happening. I have checked voltages and verified the ROMs. Thanks for the help.
Schematics: http://www.aurcade.com/games/manuals/00001990.pdf

Video: https://photos.app.goo.gl/aVPhYuKydLGx73uB6

I'm thinking it might be in the motion object horizontal line buffer section.

 

[Torin]

Any ROTJ experts here? There's not much out there on these pcb's over the years.

 

[Atari Force]

Any ROTJ experts here? There's not much out there on these pcb's over the years.

Most likely a bad 2149 ram @ 4P or 5P. Could possibly be a LS163 in that area too.

Brian

 

[Torin]

Most likely a bad 2149 ram @ 4P or 5P. Could possibly be a LS163 in that area too.

Brian

Thank you. I was eyeing those 163's on the schematics too.

 

[Torin]

Finally got around to fixing this. Turned out to be a bad 2149 at 4P. I had some 2114 replacements that were either bad or too slow and so the problem got worse after socketing that location. I found a faster 2114 and it fixed the game. @Atari Force , you were spot on. Thanks!