HI all,

I've no experience in repairing or in electronics but I opened my amp
to change an input jack and noticed this:

http://img360.imageshack.us/img360/8...mage0012tf.png

http://img451.imageshack.us/img451/6...mage0047pi.png

http://img84.imageshack.us/img84/744...mage0024my.png

It looks like zener diodes have burned the board under them.

The amp works great, the sound is ok, should I change them?

here is some schematics I found:
http://img84.imageshack.us/img84/4839/schemaparz6bm.png

here's the zeners' pdf:
http://www.ortodoxism.ro/datasheets/eic/1N5368A.pdf

thanks for your help

PS: sorry for my english...