Thanks for your answer J M Fahey..... will try to answer the question

1. The schematic will be attached........ or they are easy to see at http://www.rru.com/~meo/Guitar/Amps/Lab/schem.html

2. Yes there are two fuses, the other one did not blow, just took it out for the pictures, the fuses are 2,0 A at 250 V. The red circeld blow.

3. I am from Germany and we have 220 V AC

4. I will ask my husband to record the sound. To my ears, this functions do not work at all........ i can hear no difference.


When i believe to my husband (), they worked before. I guess the problem appeard, because he did not use that thing for many years, and ist was in the basement. ....... But he loves to play with it, an so i try to repair it.............

Thank you very much for your help,
Susanne

i am writing in the name of my husband, cause my english is little better 

We have a little problem with our L5 Amplifier. My husband did not use the L5 for a few years. But now he started playing his guitar again an used it for a couple days. It worked fine until yesterday.

The functions like "Reverb", "Frequenzy" and "Multifilter" now sound very strange, and one fuse of the Powersupply blow. (see on the picture, if i get it attached :-)).

I have no idea, where I should start searching for the mistake. I am a electronics technician, so I can measure and change broken parts, but I have no Idea how this amp works.

I checked all boards by looking, could not find any burning marks, or broken parts.. Where sould is start?