So last night my wife helped me disassemble a spare Last Action Hero harness that was left over from a playfield swap and I started making a harness from scratch for Seawitch. The Stern wiring diagrams are horrible! I'm actually maintaining factory color codes and use as documented in the manual and it might be the only Seawitch to have all the right colors "as documented"
The harness is being scratch made 100%, all to factory code. Its also being done in such a way that should the opportunity presents it self in the future the playfield can be swapped into an actual Stern cabinet and just plug right in.
Some notes from resident Bally/Stern guru:
1) the coin door/cabinet wiring is that Stern shifted all their switches onto strobe #0 - no strobe #1 running into the cabinet/door.
2) The second (memory clear) switch on the coin door just replicates SW33 from the MPU board so you can zero audits without opening up the backbox.
3) The volume control is a 25k logarithmic pot - different to Bally and it's not connected in series with the speaker like Bally.
4) displays, the 7th (millions) digit enable signal is on different pins at the display connector comparing Bally (pin 12) vs Stern (pin 11). The Pinitech displays should handle both.
I take great amusement know a fair portion of this Seawitch is actually using Stern parts.. although from a different era Stern machine (Data East)
839aa6546cf23979e51aeb79bbb9bb9d3a2693aa (resized).jpgdcfdc5a12ce23354f91a619965ef58ebfd1a3814 (resized).jpg