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
Any one seen this phenomenon before and know the fix???
Regards Graham
Not yet, only the platter is spinning or does it start playing? (Record on of course)
ProGram: Not yet, only the platter is spinning or does it start playing? (Record on of course)
Just the platter spins, it doesn't start to play. It sometimes does it with no record on!
Check for free movement of the dual-headed start/stop solenoid.Check all the mechanically operated microswitches, their tiny square springs can sometimes come off, leaving the affectedswitch constant on or off.
Martin
1S1 causes the platter to spin. It's located on the bottom of the triangular shaped pcb near the big gearwheel. It's also possible that the diode D9 became defective.
Dillen: Check for free movement of the dual-headed start/stop solenoid.Check all the mechanically operated microswitches, their tiny square springs can sometimes come off, leaving the affectedswitch constant on or off. Martin
Solenoid is free to move, I've never seen a tight one! Micro switches all check OK.
The motor is not getting full voltage as it is almost but not quite at a standstill. Maybe spinning at 10 rpm and no torque. I can stop it with my finger and start it again by turning the platter. Weird
Double post
ProGram: 1S1 causes the platter to spin. It's located on the bottom of the triangular shaped pcb near the big gearwheel. It's also possible that the diode D9 became defective.
Defective diode is a possibility. I'll change the board for another and see if that cures it and investigate D9 later.
joeyboygolf: The motor is not getting full voltage as it is almost but not quite at a standstill. Maybe spinning at 10 rpm and no torque. I can stop it with my finger and start it again by turning the platter. Weird
Ah! That could be the transistor TR6. It switches the supply voltage for the motor. Maybe it's leaking.
Sorry for my earlier post. Diode D9 cannot be the fault, it is conducting, when the pickup has moved in (1S1 closed). I wondered about the circuit in the manual, which i downloaded. It is a little blurred around the motor. So in the printed version it's clear.
A replacement board would cure it, no doubt, but else TR4 / TR5 (both BC337 - you have those) andalso TR6 and TR10 could be at fault.
You already replaced one leaky BC337 - it was in this deck too, right?Could be a bad batch.
I might just push my luck and replace all the BC337's on the board. I'll order some TR6 and TR10
Will keep you all informed.
joeyboygolf: I might just push my luck and replace all the BC337's on the board. I'll order some TR6 and TR10 Will keep you all informed.
Replaced TR10, not cured the problem. Will sleep on it for a bit
Hi Graham
i am having exactly the same issue with my Beogram 6500. Did you find the problem?
Dom
2x BeoSystem 3, BeoSystem 5000, BeoSystem 6500, 2x BeoMaster 7000, 2 pair of BeoLab Penta mk2, AV 7000, Beolab 4000, BeoSound 4000, Playmaker, BeoLab 2500, S-45, S-45.2, RL-140, CX-50, C-75, 3x CX-100, 3x MCL2 link rooms, 3x Beolab 2000, M3, P2, Earset, A8 earphones, A3, 2x 4001 relay, H3, H3 ANC, H6, 2014 Audi S5 with B&O sound, and ambio
Steve: Hi Graham i am having exactly the same issue with my Beogram 6500. Did you find the problem?
No, sold it as spares or repair, in the end.
If you can't diagnose the fault and find the one defective component, you could choose toreplace the complete circuit board.