how to fix a fried MT-2?

[Hailstorm350]

Hi all,
here's the symptom:

I lent my digitech GNX2 to my friend.  His 1-spot adapter had died a while ago, and was using batteries, but his MT-2 seems to suck the life out of batteries even when there's nothing plugged into it and the switch is off.  Anyways, that's not the issue.  this is:  He plugged the 9VAC 3Ampere adapter for my GNX into his boss.  GRR.  He noticed it wasn't working... DUH!!!     He also tried a battery and it doesn't work now.
ANyways, I now have it disassembled on my desk next to me.  There are no blown electrolytics.  (the tops aren't bent out)  and the pedal reeks of burnt electronics.  I am guessing that it is the diode next to the power jack.  If anyone could help me troubleshoot this, it would be of great help.  I can take pictures if it would help.  Thanks in advance
Ken

[j0shua]

is better if you take a picture of the MT-2 .....

hmmmm 9v and 3A is not good idea hehehehe 3A can burn any component

[Hailstorm350]

OK, I'll take pics of it and send them in.   It doesn't really look like anythings wrong with it
So I don't know how much a pic will help you out
Ken

[loscha]

http://reveng.sevcom.com/metalzone.zip

I've got this on my site
I scanned them in a while ago, when I got the service docs from Roland. I was totally shocked that no-one else had a proper scan of them online.

[Joep]

Most likely the protection diode is gone.... It's D006, have a look on mt2-06.jpg in the zip file. You can replace it with a 1N400x type diode, make sure the polarity stays the same (check the white or black ring on the diode)

Bye,

Joep

[Hailstorm350]

i can't seem to open the zip file.  I have a mac but I have the most up to date software for unarchiving zip files. Anyways, I'm gonna check the diode with my dmm  today and get back afterwards.
thanks,
Ken

[Hailstorm350]

lol really really old post, but it was the protection diode,  thanks guys, if you are still readin the forums.