Volt power supply bridge fails fuse f5 or f6 7 amp slo blo on the power supply blows.
Pinball power supply problems.
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.
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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If either of these voltages are bad your displays will not work.
Note the 1n959b is mis labeled in the manual as 1n9598.
If you replace this blown fuse turn the game back on and the fuse immediately blows.
This means the 5 volt bridge br1 on the power supply board is shorted.
Bad capacitors and bridge rectifie.
A reset trick led stuck on adding a capacitor.
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.
And quite often this power supply section does go bad.
This bridge can fatiqued and cause the game to have random resets.
Db1 power supply bridge rectifier problems.
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Keep a few 35 amp 200 volt or higher bridge.
If having problems with the reset led stuck on try shorting together with a screwdriver blade pins 39 and 40 of the u9 cpu.
The 39k ohm power supply resistors.
The power supply board s db1 bridge rectifier supplies 5 volt and 12 volts to the entire game.
