Seibu SPI System Repair

Fibonacci

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Feb 17, 2007
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I picked up a Viper Phase 1, but all I get from it are random short white lines.

The length of the lines changes depending on whether or not it is in new cassette mode, but long term, it doesn't seem to matter which way I go.

I have a manual for it that refers to the jumpers, but I don't see any indication of what orientation they should have. One of them is on parallel to the jamma connector and one is perpendicular.

Anyone have any suggestions? The manual says to make sure the 12 volt line is stable, but it is a solid 12.4VDC, the 5 volt line is a solid 5.1VDC.

I know the cab is good, as a couple other jamma boards work just fine.
 
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