Martin Olsen (Dillen) can supply you with the cap kits, belts etc. I have used his services many times with good results.

BTW I picked up a Beocenter 7700 myself a few weeks ago and plan its overhaul next month. I will need to order cassette belts from Dillen myself soon.

Oh good, thanks for letting me know. I'll be sure to contact Martin.

It really is a nifty machine, I can tell already how well designed it is.

I just bought one to mine was a little scuffed up had some marks and scratches but it works great exept the tape player does not but everything else works fine as for the control panel it may be the latch on the front undernieth the lid maybe broke off look there first (don't know were could find one if it is broke though) i have i different problem mine i can open but it doesnt raise by it self like it is supposed to if you don't have a sevice manual & owners maual  i would suggest getting one you can get them here if you are a paying member they will worth getting would help you with disassemling and reassemly if you need to on this .   Good luck   Roger

The problem with the record player is I think a well known problem. There is a very small metal pin going from the underside of the record player top plate to the upper side at the rear of the tone-arm. This is the arm-lift. This pin is for lowering the arm to the record. After several years the grease that is used for lubricating the pin dries up and the pin does not move anymore. Use a little alcohol to get it running again and the arm-lift will work again!

My tonearm now lowers to the record and returns at the end of the record with no fault. I was in contact with Dillen who helped diagnose a few issues and non-issues. He told me it was most likely the oxidation on the contacts wearing off or loosened up grease after me trying the tonearm so many times. I was also able to put the tracking weight on point at 1.2g instead of the 1.5g I thought it was for the BC7700. I am going to try to clean up a bit (check that pin) since it has been sitting for the last 30 years or so.

As for the lights, I learned that the large red LED display are its own separate component that would need to be worked on, which I understand is a very detailed process. But if I were able to just find another working display of another BC7700 then, that I could swap them for a smoother process. So far, I am fine with a few lines missing from the display as I can make them out for use. Eventually when I find this beocenter for parts, I will try fixing the display.

I'm going over the service manual, to see how to fix the control panel door. I see that there is a black latch (friction plate, #2038) at the rear of the door that seems to be cracked. I am able to push the whole door down with much force feeling like something else would break, then it rises back to open about 20%. I'm not sure if it's normal, but the control panel door lifts up more than the record player dust cover.

It make sense that there is another latch at the front to keep it shut. From the service manual, I see it could be #2041, which is a lock it says. It is not an issue that keeps the unit from working, only visual and I can make sure to take extra of cleaning for dust. I'll keep trying with this one.

My tape deck doesn't seem to work, when I start it, I see and hear a large click of the metal mechanism. The metal part seems to grasps the tape but then retracts from it. I doubt that I am going to use it as much as I will the record player so probably a later project along with the display.

This forum has been a big help to me already and very welcoming. Hope you all enjoyed a great Christmas.

Belts probably on the cassete deck I ordered mine from Martin just the other day because mine does the same thing which i hope won't be hard the way he explained

I order my cassette belts from Dillen as well, plus I already have all the capacitors I need for the recap. Probably start the refurb next week.

The cassette belts should not be to dificult a couple mounting screws and a nd a few pin plug ins will need dicconnected then the tape mechanism will pull out. I have replaced belts on a Beocenter 7000. The 7700 looks very similar.

So you don't need to unsodlier any thing correct? just unplug some wires then? any trouble with the programing door opening all the way mine only opens about 1 inch supposed to open all the way by itself ive heard maybe a clean and lube ya think? dust cover on turntable also same thing but it opens half way

I'll add tape belts to the caps kit then. Thanks.

I beleive my control panel door is due to a broken hinge as I can see a clear crack in it. I have yet to plug my beocenter to speakers but will do so this week.