Hello - I recently noticed my BOPP was seemingly missing a ROM Chip from the MPU (see attached picture). I ordered a new MPU board, along with SDB and Lamp Driver board mainly due to free time availability, however I'm curious if someone could help me with what that ROM Chip controlled? I have the schematic, but no matter how much I enlarge it, I can't read the writing on the version I have for the MPU Control Board. (The chip missing is U1)
Subsequent question, is the U1 displayed on the MPU schematic the same as the blown up version for the Lamp Driver Schematic? If so, then it would appear U1 is controlling roughly 16 different lights, all of which would be out on my playfield.
Also, notice the jumper wire on U2 that connects to R14. This doesn't appear on the schematic, any idea what this is for?
Thanks so much!