What type of capacitor is the blue and red/brown, ceramic?
What is that 33 J1A value?
Where to find audio capacitors with thoose numbers and wich type is the better ones?

Silverhorse wrote:you find the problem, good for you!
is this transistor part of the clipping circuit?

Don´t know for sure, but think so. Only have my poor mans schematic
The sound is better after the bias adjustment.

Solved the clip led problem. Transistor Q122 A1038 was kaputt.
Thanks for your help!

Do both channels sound bad (right and left), or just one of them? Try to play them on a full range speaker to hear the most detail. It´s both channels, most in the midrange and up. Not much, but it´s there and is not pleasant to listen to in the long run. Is there something I can messure in the amp...

That's a very clean M100 you have there! If the 6 blue psu caps are still the original ones then replace them first before you do something else! They catch fire if you don't. The yellow pots are for bias. Take a picture of them or mark the position with something. Than turn them slowly counter clo...

Hello Anders idle current should be no more than 2A. did the amp had repairs before? Hello! I bought it from a fiend of mine who bought it new in the nineties, so no repair before the recap and the transistor. The idle current rises very slowly from 1,4A at start, 3,2A after 10min with no input. Ye...

Hi! Got some issues with a M100. When I got this M100 the clip led was on all the time, but it seems to work ok. Then I read about this cap leakage and did a recap on the six 2200uF just to be safe. Every thing worked out fine when I tested it in the car for a few minutes with a sub, but suddenly it...