On Feb 17, 4:01 pm, "Mark D. Zacharias"
wrote:
Ronald wrote:
I just got this unit. It powers up and the protection kicks in. I've
repaired a 840 with this same problem. but it appears on this unit
the 15 volt regulator gets real hot. I've replaced it already with
the same results. If anyone has any tips or pointers to where to look
I'd appricate it.

-Ron

If the 15 volt reg gets hot, it seems to me there's some IC or other loading
it down. I'd sub in an external 15 volt or so and see what gets hot.

Mark Z.

I just got a schematic for it. Traced back to the diodes on the dc
power board. Gonna replace them tommarow. Odd readings on the
diodes, in diode test i tested it both ways one reading of 1.1 and .5
and a few just .5 in one direction. my guess from my repair work on
pinball machines .4 - .6 is ok diode but could possiable failed
diode. But I'm replacing them with new ones. to ensure a rebuilt
power supply.

-Ron