Bringing a SS Cleopatra back to life. Installed a Pascal X4 board. Just one issue:
1. Everything boots up & works except for the flippers, pop bumpers, & bottom side bumpers. These are not run by the mpu.
2. Displays indicate SLAM. I jumped the slam on the X4 board; this allows everything to work, except for the coils which do not run from the mpu (flippers, pop bumpers, side bumpers).
3. The slam switches are as they are supposed to be, closed. Tilt switches are open
4. All fuses are good.
5. Q & T have been checked; rectifier has been checked.
I'm wondering if there is a ground problem to the circuit of coils run by the bottom board. Again, everything will work as normal when I jump the slam pins on the X4, but the the bottom board driven coils will not work. I think the circuit that the bottom board driven coils are on believes it is slammed for some reason (ground or something blown on bottom board).
Machine was previously not working, with dead boards. There was a dead & toasted pop-bumper coil I replaced before putting the X4 board in. I also did a re-pin of key connectors to the mpu.
Any help will be appreciated.