Can anyone help. I have a 380SE 1985. Idle speed is very high, 1500RPM. I've managed to pin it down to the idle speed control box. On the circuit board there are a couple of burned out components. Current is being supplied to the idle speed valve through the black wire but not returning to the black box. Momentarily earthing the green and black wire closes the valve and the idle reduces. The green and black wire has continuity to the box connector so wiring and valve are fine. My problem is that I can't find out what to replace the burned out components with.
Is there a wiring or circuit diagram available for this unit, or is it a case of buying a replacement unit (megabucks) all for the sake of a few transistors or whatever they are. Anyone had the same fault??, how did you fix it.

Go ahead and replace it. I had the "infamous" high idle with my 380 SE and tried re-soldering the joints but to no avail. Replaced the other "infamous" symptoms (OV relay) plus cleaned the idle valve and that didn't do it either. I thought I would wear out a set of brake pads trying to stop with such a high idle. Finally I replaced the control unit and .... peace at last!
Mike