need m-80 fender guitar amplifier schematic

[Jose8a]

Hi to everybody, i need some help, because i have a "m-80 fender guitar amplifier", but a few days ago.. it started to make pops when i turned it on.. doesn't matter i don't connect the plug (guitar), it pops... and when i move the amplifier it pops... i opened it to looking for if there is something wrong, but i didn't find anything, ahh but when it pops, inside the amplifier has leds (LD1 & LD2) and the led LD1 gets on when the amplifier pops... i hope someone can help me...and undestand me because i don't speak english very well...

[vintagekiki]

Fender M-80 Chorus
Fender M-80 Combo HM Series