Check power supply outputs with the output cables unplugged
When an output voltage looks wrong, measure it again with the output cables removed so a shorted load is not pulling it down, and check the supply's input voltages before blaming the supply itself.
The display supply carries 60 V DC (and 42 V DC); keep fingers off the power supply and display boards while the game is on.
Systems
Related tips
- Power supply output wrong
- 80/80A power supply semiconductors
- 80/80A power supply capacitors
- How the 80/80A power supply makes its four voltages
- Power supply ripple and regulation checks
- Both halves of the power supply limit their current
- 80/80A power supply test points and connector pins
- Typical voltages inside the 80/80A power supply
Source: System 80 Service Manual, Gottlieb