Epson 9800 ink leaks

[Colorblind]

Hi everybody, my 4 years old Epson 9800 is leaking ink for some reason which I can't figure out. I've seen magenta and cyan slides of ink all across the Epson's bed (where the paper sits once printed). It sometimes also leaks on the paper edge (see attachment). Any idea before I call a tech? Thanks.

 

[Colorblind]

Another picture of the printing head unit. Inkdrops where red arrows are.