After a loud pop at power-up and a rebuild of the rectifier board, line filter and cord, the service outlet in the cabinet has power but every test point on the rectifier board reads nothing.
No voltage at any rectifier board test point: burnt mains wire to the transformer
Cause: A heat-damaged (crispy) mains wire between the power switch and the transformer was not passing line voltage, and the J2 connector at the rectifier board had poor contact.
Checks
- With great care and the right meter range, check for line voltage at the transformer primary, then trace back through the power switch wiring.
- Check the transformer secondaries at the transformer lugs against the manual.
- Inspect the J2 plug at the rectifier board for dull or burnt pins.
Fix
- Replace the burnt mains wire between the switch and the transformer.
- Clean or repin the rectifier board's J2 connector.
This is line-voltage wiring. Unplug the game before touching it, and only take live mains readings if you are trained to do so safely.
Systems
Games
Related tips
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- Upgrading the AS2518-18 / -49 rectifier board
- Bench testing a rebuilt rectifier board
Source: Pinball Repair help group!! (Facebook group)