iz8dwf | Zaccaria Galaxia arcade repair #1. It failed as I was fixing it. @iz8dwf | Uploaded November 2022 | Updated October 2024, 3 hours ago.
This is a repair video of a Zaccaria Galaxia (a.k.a. Super Galaxian) arcade
PCB and its sound board. The original faults were a bad 74S112 and a bad 74LS173 but other ICs failed during the repair of the previous faults.

Online romident:
romident.coinopflorida.com

Zaccaria Astro Wars repair video:
youtube.com/watch?v=b4NDJMTLrw4

Zaccaria arcade information and repair website
zzzaccaria.com/zzz/welcome.html

Timeline:
00:00 - Welcome
01:05 - Physical inspection
02:56 - EPROMs checks
05:04 - Power ON
05:56 - Missing clock
07:20 - Starfield issues
11:28 - Bad TTL latch
14:05 - Bad color RAM
14:44 - First inputs check
15:54 - 74LS283 fails
21:31 - 74LS155 fails
26:23 - Sound PCB fix & test