Hey all this is my first post on this site. Iim looking for schematics for my mark levinson 23.5 amp. It needs a recap and I'm having difficulty sourcing this information as well as bias settings. Any help would be much appreciated. This amp has produced audio magic for the 28 years I've owned it. I've heard several newer designs from other companies but nothing seems to match this amp driving my magnapan 3.7i speakers. Really want to refurbish it if possible. Thank you.
Thanks to both of you for the schematics. Also of concern is the effect of changing the original 37000mf sprague caps to lower rated 33000mf nicicons. It would seem to me that depending on where on the +-% tolerance rating the new caps fall there could be considerable differences in performance. Definitely don't want to lose any of the subtle magic that this amp gives me. Any opinions from those more experienced would be most welcome. My other amp rebuild were two old hafler dh500's a few yrs back. The levinson will be a whole different beast as getting the thing apart is a major job in itself!
While personally not a fan of the old Sprague caps I think the sound character with any modern caps will change substantially. This change might or might not be to your liking. Apparently it is still possible to source the original caps if you look hard enough. Iirc there was a thread about ml33 recapping on what's best forum which gave details.
Yes it will change significantly (or more), but only judge the sound after a substantial beak-in period.
1000 thanks. You both confirm my suspicions. I will snoop around and see if I can find some old spragues as originally speced.