DBX 100 Boombox

Question

Hi,

I have a DBX 100 boom box that has had a burn up on mains input stages, mains transformer primary is open circuit, it was switched to 110 volt operation and someone plugged into 250 volt mains in the UK without looking to adjust the input switch, there appears to be no other damage except 1 resistor burnt out, we don't know the value, so a service manual or schenatic diagram and layout is required to go any further with this repair.
Hope you can suggest an answer, many thanks.
Jim Bartlett.
email; [e-mail]