BeoGram6000 typ5512

Greetings dear members,

just got 'lucky' and bought a BeoGram6000 turntable - so far so good - most seem to work

after some mechanical adjustments - tone arm, platter height and suspension

but......the tonearm lowers as it should (?) but no sound ???

I red it apparently has a buit-in pre-amp ?!  does that mean it has to be connected to a line-level input

or still required to be connected to phono ?

tried both but 'no sound' audible !

and YES, the cartridge works fine............just in case you ask

is the silent-mode function dead ? or better say the opposite ??

anyone, please ......

thank you guys

ALF

If the quad board is there, it produces line level output and uses all 5 pins. It does work fine as a stereo deck though but again at line level. I suggest the muting relay is stuck. Maybe try lifting and lowering the arm using the buttons several times!

hi peter,

sadly that did not help - as suggested I plugged it in a line-level input as I thought this is the one but 'no'

silence.

it however worked at the beginning and I can't figure out what I could have possibly done

during the mechanical adjustments as the table was unplugged from the mains ??

I noticed the when lowering the arm via the lift, the carriage moves forward just a tick at the same time which is not what should happen but it has to remain on the spot ???

so, there are a couple of problems already, question is: where to from here ?

very disappointing :-((

perhaps some of our professionals have some more suggestions ?

they are most welcome

cheers, ALF

 

Sounds like the muting relay circuit. The beogram 6000 is essentially a 4002 with a CD4 decoder built in. Try cleaning the contacts on the relay with a bit of rough paper dipped in isopropyl. Put the paper between the contacts and gently press them together as you remove the paper. Don't use anything too abrasive as you will remove the plating from the contacts!

I presume you are referring to the Siemens Relay on the main board as there is no other relay ?!

 

cheers, ALF

Ignore that last picture. It's the Siemens one you mentioned. You could also try adjusting the trim pot that's near it. This effects the delay of the muting relay and may be oxidised.

hi lee & peter,

opened the Siemens and did what I could with a naked paper stripe, rubbing between the contacts as good a possible...easy to access the contacts  from the edge side of the board side, tricky from the opposite side!

whatever made an impact,  it is now back to   'audible sound'  - would be great if it stays like that.

not quite sure though how much the arm adjustment played into all of this ??  

I looked at those very tiny naked tone-arm wires that comes out under the arm-wand and go over the spring of the tracking-force wheel.

should those wires actually touch the arm assembly at all without causing a short ?????  

I won't touch anything for now......as long as I can hear sound  

thanks for all your input - good to know one is in safe hands here

ALF

Those wires are insulated with a thin coating of varnish so don't worry about them.

Glad it seems to be working :-)

Lee