Identifying a CRT and driver board

[Maarten]

I'm also pretty sure it's Italian. From the markings in the copper layer of the PCB it's one of the smaller OEM's, not Hantarex. They also made consumer sets.

MAS is the PCB raw materials manufacturer. ITT/SEL also used them.

[Xyience]

UPDATE:

I now have a bag of bits that fell off the arcade cabinet. This includes two stickers that must have come from the monitor.

both indicate the CRT is an A50-120W

One sticker is branded 'hicon', the other 'siemens'

School holidays are on the way so I will have some time to revisit this project. I have no idea if the issues lay with the CRT, driver board and/or game board so there is lots to learn.
Part of the solution might be to invest in some more test equipment (better 'scope and an EHT meter come to mind). I will warn the moths of their rare chance for flight.

[Welsh Anorak]

Hope you found some money in there - the only upside of repairing games machines back in the day!

Siemens is unlikely to be the monitor's manufacturer as we're all sure it's Italian.

An A50-120W is a 20" black and white tube which could be made by various manufacturers.

A dodge to check if the timebases and EHT are working is to connect a resistor (a few kilohms) between cathode and grid of the CRT briefly which should result in a bright white raster.

[Xyience]

Thanks Glyn - I would like to try that trick to see if I can get a raster on the CRT. Which valve pin should I connect to the cathode? there are three pins that connect forward of the the cathode and I don't know which to select. (schematic in post 15)

No money that got to me, just a few more stickers.
The coin slots say '100L' (lire?) so the machine must have been operated in Italy at some stage. I am not sure 100L coins would get me far in the EU.

[Welsh Anorak]

The grid is pin 3 and the cathode pin 6 on your diagram.