A friend of mine has an old(ish) Sony AVD-K150G DVD/VCR surround sound combo unit and is trying to find a user manual - I've had an hour or so googling etc and have only managed to come up with an 8MB Service manual from several sources - so, your mission, should you choose to accept it, is to find a .pdf of the Instructions, User Manual, User Guide, whatever you want to call it. He wants to be able to use the thing, not fix it.....
*Tosses gauntlet on the TBCS floor*