There is a reason for the low quality ;D email to Martin and ask him for the schematic, i think he will email it to you for a few bucks (don't know how much ...).
Hello! Is anyone knows where to get this schematic.On this link http://www.madamp.biz/images/a15_schem1.jpg is too low quality.I can read that.Thank you very much edit: it's probably not free?