Hi there,

the headset socket has built-in switches for the 1 pair of speakers. I would suggest those for the fault.

Chris

Thanks for the idea ProGram. have switched speakers across the 1 AND 2 speakers connecyions to no avail. whether they are attached via speakers 1 or speakers 2, the distortion is on whichever speaker is designated LEFT OUTPUT. ERGO, If I swap the wires the right speaker will distort with left channel feed. As I said, headphone output is perfect on both channels. I feel it is a left channel feed fault on the output but circuit diagram seems vague on the notation of the components of the stage.

Which version of Beomaster 2000 do you have?
Photo or 4-digit type number.

Martin

The Beomaster is 2000/Type 2912 model, Martin, and I feel that this will be a well known, if not a stock, fault to the more well-versed Techs on the forum, the likes of yourself. Donald

Well, it certainly isn't one of the most fault-prone models. They are generally fairly good.
Normally I would check the power supply to the amplifier for ripple, but since the distortion is only in one channel, I would suspect
the output stage hybrid chip in this case.
The headphones are paralleled with the speakers (through a resistor if I remember correctly). That the distortion seems to be
only from the speakers and not in the headphones could point to a load-problem in the hybrid chip.

Don't buy from China. It will almost certainly be fake or something counterfeit.

Martin 

Ok Martin, sounds like a plan to me. yes, the headphone routing is through a 220 resistor. would it in itself be enough to dampen any distortion if it is on a directly parallel circuit to the speaker? just a thought.  Donald

It all depends on where the problem is. The load of the headphones is very far from that of a speaker.
Since only one channel is affected, we can rule out power supply problems.
Since headphones have no distortion, we can rule out problems upstream of the amplifier,
and since the distortion is in both outputs 1 and 2, we can also rule out the speaker sockets and the Speakers 2 switch as the cause.
All left now is the speaker contact inside the headphones socket (that mutes Speakers 1 when a plug is inserted) and the amplifier chip.
Check for cracked solder joints around the amplifier chip, - or replace it.

Martin  

Hi FOLKS, Sorry for the delay infinalising the thread. due to unforeseen postal issues between DEUTSCHE POST and the UK, ithas takenover three weeks to obtain the STK 463. Happily it did solve the problem and the 2000 is playing sweet as a bird. Thanks especially to Martin for your help and guidance. DONALD