Working on a Bally World Cup Soccer.  This machine is resetting often.  This has got progressively worse.  The machine powers on, but every time the flipper buttons are pressed, the machine resets.

Using a Digital multi-meter, I confirmed the 5v was good at 5.05.  However, when I switched to AC, the reading was showing more than 0.5V ripple. The power driver board was returned to my shop for an overhaul.

This board was in very good condition.  I note that the 5V rectifier and capacitor had already been changed, but with the “plastic” 3504 style rectifier.  I replaced this with a 3506 (full metal shell).

Put a new capacitor in C5 (15,000 uF), BR2 and C4.   I have found C4 to be often neglected in boards I have come across.

As usual, I took the time to clean the board and inspect the solder joints.  There should be no reason we can’t leave the board with solder as good (or better) than the factory.

This picture show using a illuminated loupe to inspect the soldering (repair) on the rectifier.

Board was returned to the game and is now working fine!

 

Except….  on the first play test, the Goalie (plastic) broke in two….