Professional software development, amateur BMW tinkering, old arcade game stuff


Viper Phase 1 / Seibu SPI arcade pcb repair

Sound would go quiet after a few minutes, and it seemed like different elements of the sound would have incorrect volumes (drum track, music, explosions).  I think that’s because the sound chip outputs multiple channels which are mixed externally before the stereo amp but didn’t look too much into it.

Instead, I just swapped out all the capacitors in the audio section – I think all are 100uF, 25V.  This seemed to fix all the audio problems.

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