Hi!
I bought a BC7700 some time ago, but I only yesterday found some time to work on it. It came with the MCP7700, a pristine SC77 and a couple of RL60s, all for about 90 euros. The speakers are in really good condition look-wise. I haven't had time to open them up, but a rattle suggests at least the ABRs need fixing.
I started cleaning the BC7700 (not thuroughly, yet, just get most of the dust and other other crap off it) and testing it a bit.
It seems to work pretty well. Obviously the tape deck needs new belts (they are still intact but so enlarged that they were lying on the bottom of the machine. :-) )
The part of the hinge for the programming lid (the one that is slid into the alu plate, I believe it is 2038 - "Friction plate" in the service manual) is cracked and needs replacing. Would anyone have a spare?
By just looking at the caps I can't see anyone obvioulsy cracked, but I guess they will need replacing anyway.
When playing (any source) the right speaker comes and goes. It appears that by increasing the volume it comes back, but that could also just be a random coincidence. Also I found that adjusting balance may make it come back, but again could just be coincidence. Turning off, and then on again, the speakers by pressing "Speaker 1" button in the programming section also seem to have some effect in bringing back the right speaker, but I wouldn't say it consistently works. Oh, and speakers 2 show the same behavior.
I should also mention that pressing "Mute" mutes the speakers but not entirely, very low volume is still coming out.
I've been reading (probably every post regardning the BC7700 and other systems) on the forum, but I couldn't find one with my particular issues.
Anyone have any ideas?
Thanks!
/ Johan