My wife has a friend at work. an older lady who has a Sansui 6060. Said it had some problems with crackling and the "channels being off". I got it open and was shocked at how brown and dusty it was! Apparently it has been in a heavy smoker home since new. lol The wife volunteered me to fix it and now I'm wondering what I got myself into. Cleaning out the grunge isn't a problem. I have a large tank I fill with Isopropyl and a paintbrush and go to town. For the nicotine stains I use very dilute ammonia which I find both removes the smell and the stains. I was also going to remove the heat sink and regrease them as the old stuff looks cooked! Is there a way to get that heat sink out without having to unsolder wires? Whats the best way to get at these things?