Disassembly is different, depending on the version.
The chassis of the grey faced version (type number below 2230) comes out complete with the knobs and dial whereas the black faced version (type number 2230 and up) leaves the outer dial "screen"
in the cabinet requiring dismounting of the 4 round knobs.
Note that the round knobs are of three different types;
One has finger grips and indicator mark (volume)
One has finger grips but no indicator mark (tuning)
Two have indicator marks but no finger grips (bass/treble).
Both versions have screws at the bottom and some sub-types has tiny
screws sitting at the backside upper and lower chassis edges.
Others have two fairly large screws at the back near the chassis ends.
For the 700K/900K Beomasters there is a plug for the internal speakers
that you will have to remove once the chassis is about halfway out
of the cabinet.
The Beomaster 900M has no built-in speakers.
The Beomaster 900K has two built-in speakers.
The Beomaster 700K is mono and has one built-in speaker, disassembles like the others.
Martin