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


Taito Rastan arcade pcb repair

After working on pcbs with no self-tests for a while it was quite refreshing for this one to say exactly what was wrong with it – ‘COLOR RAM ERROR’.  The two color RAMs are located next to the PC040DA customs which are the digital to analog convertors for each of the RGB channels.  A logic probe showed that the lower RAM had stuck outputs.  Replaced this chip and the board was perfect.

Note that although the board has 2018-35 silkscreened on it (35ns response time RAM) the RAM installed was actually 45ns which works fine.

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One Response to Taito Rastan arcade pcb repair

  1. Darren says:

    Thanks for this, made me easily find the correct rams, to fix the same error on my rastan.

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