Pinball Power Supply Problems

The simplest thing to check when the score displays do not work is the 100 and 100 volt dc power section of the power supply. If having problems with the reset led stuck on try shorting together with a screwdriver blade pins 39 and 40 of the u9 cpu. A problem that might be unique to this particular version of the data east power supply is that sometimes an electrolytic capacitor on the board will leak arcing and creating a short between the horizontal trace and a via circled at left.

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And quite often this power supply section does go bad.

Pinball power supply problems.

With acute attention to detail plug and play technology and complete redesigns of classic game technology our products are built to the highest standards of design technical specifications and manufacturing. Volt power supply bridge fails fuse f5 or f6 7 amp slo blo on the power supply blows. If either of these voltages are bad your displays will not work. If you replace this blown fuse turn the game back on and the fuse immediately blows.

6 16 7 cracked power or ground header pins and cracked solder joints at the 5v fuse 6 16 8 missing diodes open diodes or cold solder joints at the flipper coils 6 16 9 poor connections between the transformer secondary and the power driver board 6 16 10 poor connection at j101 on the power driver board. A reset trick led stuck on adding a capacitor. Db1 power supply bridge rectifier problems. This means your problem probably lies with chips u6 u9 or u11 or their sockets or incorrect mpu board jumpers.

This means the 5 volt bridge br1 on the power supply board is shorted. The power supply board s db1 bridge rectifier supplies 5 volt and 12 volts to the entire game. Often the power supply s solder points for this bridge are cracked or even have black rings around the bridge leads caused by voltage arcing across the crack. The 39k ohm power supply resistors.

Reset line low for a short time while the power supply and its associated filter capacitor this can be replaced with a 1n4738a diode 8 2 volts 1 watt. Bad capacitors and bridge rectifie. Note the 1n959b is mis labeled in the manual as 1n9598. Keep a few 35 amp 200 volt or higher bridge.

This bridge can fatiqued and cause the game to have random resets. Xpin is the leading provider of aftermarket replacement displays driver boards and power supplies for pinball machines.