[time-nuts] Z3801 Power Supply Schematic?

[RICHARD GOLDING]

Hi, can any one tell me where I can find the schematic for the Z3801a Power supply board?
My Z8301a now refuses to start up. All the pico fuses are intact and there is obvious signs of overheating/damge.
There is a connection between the power input +ve supply and both the DC/DC converters but there is no connection betweenthe -ve and DC/DC converters - hence no output voltages anywhere!
I remember reading on the forum that there is a pre-regulator between the Power input and DC/DC converters, so I'm guessing that is where the problem lies, but without a schematic it's going to be hard to locate a fault.
Any help appreciated
73
Richard G3VZG