Hydraulic schematic Hitachi EX215 or 225

Hi everyone,

a friend of mine is going to do a lot of work on a Hitachi EX215, and he need a hydraulic scheme of it. The dealer only has some .jpeg pictures, but the quality is terrible, so it is hardly to read.
Can someone tell me where to find a scheme in pdf format or someting else, with a better quality?

Thanks in advance

Hydraulic schematic Hitachi EX215 or 225