Manson/Maplins etc psu

Does anyone have a schematic and or calibration instructions for this power supply that is sold by different outlets. I have been asked to repair this one that had a blown capacitor that now works but the displayed current and voltages are way off and not within the range of the offsets in the hidden menu. Unfortunately, the owner has played with the pre-sets on the back of the front panel, and these are the ones I need info on. Even a photo of the pre-sets on one that is working ok might give me a starting point.
Any help would be greatly appreciated