No trace of the schemo so far.The worst is that I cannot contact any service center in the area where I live (the local DigiTech dealer is unable to provide a schematic and the DigiTech website doesn't offer any help for overseas users except an expensive Europe-to-USA phone line).
...so that I made a couple of pics.
As you can see,the C30 is shot.
Judging by the nearby components,the C30 should be a tantalum electrolytic,as is C29 (10 micro/16V).OK,just for being sure,I'll replace C29 as well as has burning marks on it.
Any hint about what else should I look for?