You can download it from here: http://freeservicemanuals.info/en/servicemanuals/viewmanual/Sony/WM150/ Wil who runs this site is great guy, if he has a manual listed on his site then he has it, if it's not been scanned yet just drop him an email and he'll scan it, all manuals are free!
Thanks for the link but i think this model service manual is not there it gives different applications like convert txt to PDF....