Need Help With Korean A-One AM-0629 Chassis

[Ookpik]

I am fixing this chassis for a friend and am having trouble. I have deduced that the problem is most likely the voltage regulator however I have no idea which part or parts comprise the voltage regulator.

The chassis is the type that was used as a replacement chassis for 1980’s video arcade games. Unfortunately, no documentation seems to exist for this chassis. The closest schematic I have located can be found Here.

A larger image of the chassis can be found Here.



Any help would be greatly appreciated! 

[Ookpik]

I did a cap kit on the chassis. No change.   

If anyone else has any suggestions they would be greatly appreciated! 

[coromonadalix]

hum  check  on the aluminum plate,  i think the Q05  is a regulator or the flyback driver,  do i see some U02 near the plate

your closest schematics is for speakers   not for an monitor