Every coil or flasher in one bank is dead.
Whole A or C bank of coils dead
Cause: No coil power reaching that bank.
Checks
- Ground the bank relay driver tab and listen for the relay to change over. If it switches this way but never during the solenoid test, repair the CPU/driver board.
- Check the coil fuses.
- Check the bank select relay contacts.
- On games without an auxiliary power driver board, check the solder on the bank select relay board under the playfield.
Fix
- Repair the faulty item found.
Systems
Related tips
- Whole groups of coils or all flashers dead: A/C select relay stuck
- C-bank coil or flasher not working
- 50 V coil dead on an early System 11 game
- System 11 coil outputs
- How the System 11 A/C bank select works
- Where the coil diodes are on System 11
- Isolating the 50 V flasher circuits for LED flashers
- Which output drives the bank select relay
Source: Pinball Machines: How They Work & Troubleshooting, Norbert Snicer