I have a display with missing this component on D3.
I search from williams schematic manual for it but show it is 1N4474,which is zener diode,but original component must be with three legs.I think this is not the right schematic.I search for this diode and it's with two legs not with three and smd.
Any help with this?

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Yes,it work but need time to show up full.Looks like outgased.
I just checked in Williams WPC schematic for Cherry.

I ask a friend and he told me that this is zener diode,but the down right leg is no used on smd version.Just can use not smd,standart.So will try tomorrow.

It was there,but looks like someone tried to replace is,and there have broken trace and the two legs are broken.

Yes,the missing component was took out.
After put the right diode from the schematic,which is 15v 1W,the display want even show picture.
After put the component which were there before,the display start but very very slow,like very very outgassed.
Cannot be see any mark on it even with magnifying glass.
I try to use it on Williams/DE with the same result.
Somewhere before I read that Gottlieb used lower voltage for their displays.
Any idea what to try to put to run it on Williams,DE?
On the picture is with the broken trace,just to show how it looks like.Of course to work I made the connection the broken trace.

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It was took from DE TOMMY,and work same with Williams,because both use same voltages.
I have schematic from Street Fighter 2,but there is no schematic for DMD and even the components.