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SEGA Model 3 PCB "Riser Cable" for repair analysis

alpaca

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Hi,

Allow me share my work in progress project, want some opinion and feedback.

SEGA Model 3 GAME BD is made up of 3 PCBs stacked up which makes failure board analysis and repair difficult. Would it help if each PCB can be easily accessed? That is my concept of "Riser Cable" comes in.

I got this idea from PCs video card riser cable. This will be inserted between PCBs and move target PCB so that it can provide enough spacing for test equipments to go in. Of course, if riser cable's quality was poor and signal quality does not meet SEGA's spec, game will not boot or work as intended. This area needs some further digging if moving forward.

I know that there is well documented SEGA Model 3 repair guide so most of common failures may have been addressed so this kind of item may not be required. What do you think?

I've already built one riser cable for proof of concept. 200 pins (50 pins x 2 rows x 2 connectors...) all hand soldered. Checked all connections and looks fine. Next weekend, I will try this on my Model 3 game (SPIKEOUT FE, network board) if it works or not.

Thanks,
Alpaca
 

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