Looks like a fairly cheap product despite the lettering. A bit like chromed plastic with that "Made in Denmark" cast into it. Fairly new too, with that logo script. Martin

I agree with Die_Bogener. There's a group of caps near the power supply area. If bad, they will affect the muting circuit etc. and the symptoms you describe is typical of marginal caps "warming up". It will only get worse with time. Replace the lot and check for cracked solders around the voltage regulators etc. Martin

A ballpoint pen ? Martin

You can adjust the motor speed using a tiny flat-bladed screwdriver inserted through the hole (and through the rubber cover) on the top of the motor. Martin

Hi and welcome to Beoworld ! First make sure to reset all programming by disconnecting from mains for a couple of minutes. If this doesn't solve the problem, it will probably need a light servicing, maybe the amplifier idle currrents need fixing. Martin

Sadly a quite common fault on these wonderful speakers, especially when transported. You can glue it back on but it's practically impossible to do so without damaging the coil since it gets squeezed between the magnet and the cylindrical center piece. Aligning the magnet while the glue sets is also difficult due to the magnetic forces. I've

I've seen sets where this capacitor has blown itself to pieces. The schematics gives the voltage rating of this cap as 5000 volts, and that's clearly not made so just for the fun of doing it even if the 200-250 V voltage clearly isn't what kills the capacitor. The problem comes when the capacitor starts to leak, acting as a resistor. Ohms

As already mentioned a couple of times, this sets chassis can potentially be the bearer of live mains so having one of the antenna leads carry live mains would make for a lethal hazard. Especially, since this is the pin you will be connecting to the water pipe. You wouldn't want to hold both, let alone connect them. Clever enough then to put a capacitor

Capacitors. This could easily be a very long chapter. Capacitors is an issue in this set as well as any other set 20 years of age or more. We've already looked at the mains smoothing and filter cap(s) so I will merely name a couple of other types; Of non-electrolytic caps, the wax paper is the worst type. I've still to see a wax paper cap that

The valves pins (side contacts in this case) was cleaned using a glass-hair brush to remove any oxidation, dust and dirt. Also the sockets were cleaned using cotton buds and isopropanol. Try to avoid getting isopropanol on the bakelite of the sockets and bases, not all types of bakelite like it and it may even turn the bakelite slightly conductive.