Hi team.
Had a strange one with a Stern Solenoid Driver Board. (Rev C)
Had been working 100% for the 3 years I’ve had the machine. Today - all coils dead. Including flippers.
Checked all the usual suspects - fuses, wiring, rectifier, connectors etc etc. reflowed the connectors just in case (a bit dull). No change - Finally swapped in another Rev C SDB from another pin, and machine ran 100%.
Swapped bad board into the donor machine - same result. All coils dead.
So, we have narrowed it down to the board.
Voltages from SDB in the donor pin:
Solenoid Driver/Voltage Regulator board:
* TP1 = +5 vdc. 5.0.
* TP2 = +190 vdc. 175.
* TP3 = +5 vdc. 0
* TP4 = +230 vdc. 245-250 (fluctuating)
* TP5 = +11.9 vdc. 15.8
Tp6. 0.
Tp7. 0.
Tp8. Ground
So - no 5v at TP3. I’m not sure what 6 and 7 should read - they’re not noted anywhere ...
Any ideas?
TIA!
rd
