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SmokeMonster

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Following my other Namco System 11 & 12 Tekken PCB restorations (Tekken 2, Tekken 3), here is my Tekken Tag Tournament (PCB Ver A3) project. I washed the PCB, fixed the hanging SMD cap/lifted trace on the top board, and fully recapped it with long-life 105C rated electrolytics. I also added a CR2032 coin cell to it, and applied Arctic Silver ceramic thermal paste to the two heat sinks. It works perfectly now.

Namco System 11/12 boards have notoriously horrible SMD component soldering (I've documented this here and here), so if you see them listed as "broken" or with dim video or missing audio, scan over the seller's pictures and see if you can spot missing SMD components. If so, they're usually dirt cheap and extremely easy to fix. After recapping them though, sys-12 boards are beautiful and have held up pretty well with time, despite what you might think by watching videos. The gameplay experience is just as you remembered :D

Before
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trace.jpg

After
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nem

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As per Mr T Guru's post in that thread:

a blue screen with a weird white Japanese character in the middle of the screen means the CPU (on the top board) can't see the program or the program is bad. Mainly it's a bad connection somewhere between program ROMs and CPU, but it can be a bad TSOP.
You could try reseating the boards.
 

chinitosoccer

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Then the program is bad or a TSOP is dead (what's a TSOP?) because I already reseated the top boards like 100 times while inspecting/testing it.
 
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