ARCHIVED FORUM -- March 2012 to February 2022READ ONLY FORUM
This is the second Archived Forum which was active between 1st March 2012 and 23rd February 2022
greetings all,
just purchased a Beogram 4002 but sadly it has problems lowering and raising the arm ??
yes, I lubricated all the usual suspect items around the solanoid/damper but nothing seems to help.
which electrical components are also suspect to may have failed over the years ?
could some experts shed a bit more light into this problem - I just don't know where else to start
thank you kindly for your expert advice
alf
You have to clean and lubricate the arm bearings. This means a disassembly (top red circle).
Do you hear the solenoid click?
Jacques
I agree with the above. The two bearings shown are critical and must be disassembled for oil to penetrate.
Beware! The circlips are easily lost..
Regards Graham
thank you kindly for your suggestion - which lubricant should be used for that exercise ?
would sewing-machine oil be ok ?
however, what bugs me here is the fact that the arm actually moves quite freely but the lever at the back of the arm, which is getting pushed by the piston of the damper to lift or free the arm for going down moves very hard ??
the clicking of the solanoid is confusing as I believe I hear the clicking of a relay rather than that of any noise for the solanoid. I will measure the DC resistance of the solanoid though to be on the safe side.
the question was also whether the solanoid is getting enough juice (amps and voltage) to be able to operate, meaning which components are responsible on the control board to potentially cause a fault in that direction ??
thanks for now - alf
hi jacques,
by looking at the explosion drawing again I fear this is the lifting arm with its spring...........that is moving very reluctantly........help me god..........!
not sure if I can tackle that ???
but thanks again - alf
BTW: the solanoid measures about 9.9 Ohm
alf: however, what bugs me here is the fact that the arm actually moves quite freely but the lever at the back of the arm, which is getting pushed by the piston of the damper to lift or free the arm for going down moves very hard ??
Sewing machine oil is fine.
9.9 ohms is about right.
I am afraid you will have to dismantle everything and lubricate with aforementioned Singer oil.
I now prefer to use special sintered bearing oil, but sewing machine oil is fine. Please get rid of any old grease residue before renewing oil!
Better do the job thouroughly than just drop some oil here and there...
Also, do buy a special tool like this:
hallo again jacques,
I disassambled the lifterarm.assembly, got rid of old hardened grease, oiled with sewingmachine oil and it moves like a baby again.
that seems only part of the problem as the solanoid does not pull in when the lift/lower-key is pressed.
once it is operated by hand the arm moves down quite freely as well as lifting freely.
I lubricated the solnanoid, but there must be some other problem with it that I can't figure out
or could be the damper responsible ??
once again many thanks for all you advice
ALF
Do you have voltage across the coil when you press LIFT?
I'd leave the damper well alone for now.
just checked:
yes, 1.34 VDC
You should get about 3V if memory serves.
no jacques,
I am afraid it is between 1.33-1.34...............measured it a couple of times
defect cap perhaps ???
question is where to start ?
the control board is full of them or perhaps a relay ?
does that mean 'game over' ??
cheers, ALF