Hi all,
Sorry for reviving this old thread but it describes exactly the problems I'm having. I have found the main issue: the 5-pin transistors (2SA798) on the main board. I swapped them out for 2 x ksa992fbu in this config:
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This made the make the crackels and pops go away. Additionally I replaced the 2 big capacitators as they were leaky. Also the 2AS726's with ksa992fbu's and the 2SC1313's with KSC1815 as suggested in this post.
However I'm still left with an issue. The sound on my right channel is distorted. It is only distored when I use a speaker, headphones only works fine. If the speaker is active then the sound is also distorted in the headphones. Can anyone give me a hint were / how to look? I can't visually see any issues with the caps etc. Also the new combi-transistor doesn't seem to be the issue as I can interchange them and the issue doesn't switch sides.