Not familiar with the circuit off the top of my head, but yeah, if you have that high a voltage on the output, it has got to be a shorted transistor or regulator (definitely no shorted tracks?)
Done some PSU testing and I have a couple of issues.
Banded side of d5 according to pinwiki should be +68v I have +163v!!
I took all new caps off and checked all traces on the pcb for shorting. Nothing. I checked the caps and they seem to be fine. I even popped the old caps at C10 and C11 back on and still gives the same reading. Surely its not the new transistor I bought at TR3 is it?
Comes from a reputable supplier but I cant find any other reason for the fault other than this.
I cannot change the transistor back at TR3 as this was binned.
Help?
Go back and check R95 again - replacing it before the HV circuit was fixed might not have been a good move as this may have been damaged by the 163v you found...
Go back and check R95 again - replacing it before the HV circuit was fixed might not have been a good move as this may have been damaged by the 163v you found...
To you guys searching this issue on a well known G search engine and found yourself here....
Check and re check R95 on the data east small DMD.
Get a decent quality resistor as a replacement. Don't go cheap!
Re-folow the power connector pins and the Ribbon pins. (easily done without removal of the glass)
If this thread helps you fix this issue then please donate a small thanks to the site!
Not in front of it at the moment but I think it's the bottom one on the power supply board .. F5 is it ?
I will double check when I get home, causes no flipper or eject to plunger etc left my multimeter in work so will check high voltages tomorrow
Nice work all. And that's why this forum is great
Another pearl of wisdom from @Moonraker! Top blokeSo @Moonraker you have saved me from buying a replacement and wasting money. Please PM me your PP so I can send you a couple of beer tokens!