Konami Gi Joe repair log

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    • Konami Gi Joe repair log

      This pcb was missing the 054986A module and had the sound ram @2D and the sound rom @7C socketed.
      The Z80 and the ram @ 6C had been replaced and the 054539 was reflowed.

      So I was expecting sound circuit problems ^^

      Ordered a 054986A repro from Caius and after fitting it, the game reported sound ram @ 2D bad.

      The ram itself tested good in my programmer, so after a bit of swearing, beer and a little help from Caius, I started to look for broken traces and so on.
      Found a tiny bridge on two pins of the 054539 custom, removed it and teh game is working 100%.