Vintage Synth Repair

Does somebody here have schematics of old power supplies Boschert  
SL220 3605R and
Lambda LOD-X-152? Both were used in early version of power pad for  
Kurzweil K250. I'm trying to repair it to be able to continue with  
repair of this instrument.

In Boschert switching power supply (+ 5 V/45 A) one fuse always blows  
away after switching on.

Lambda linear power supply (+/- 15 V/2 A) works but  both output  
voltages differ, when I set -15 Volts, + side gives only 11.5 V.

It would be a big help to me if somebody have Service Manual for this  
instrument in electronic form and can send it.

Thanks for any advice.

Daniel Forro