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
Hello Beoworld.
I come to you with a rather weird problem with my beogram 1600.
First of all i want to thank everyone who helped me with my problems before, the turntable has a new belt now and runs the perfect speed.
I now registered a new problem: when playing on 45rpm the turntable sometimes starts to "lose" speed, accelerates again and loses speed again, like an ongoing loop, sometimes even going down to like 1 rpm.
Any source of problem you could think of?
Thank you in advance and
kindest regards
Philipp
Bad speed setting trimmer.Cracked solder joints.Dry motor bearings.Wrong belt.One or more of the above.
Martin
Okay, so i will try to go through each possibility...
I already replaced the belt with one of yours, Dillen, so this should be fine :)
Just for your information: on 33rpm everything works just perfectly! So things like the bearinga should affect both speeds, shouldnt it?
TISE: I already replaced the belt with one of yours, Dillen, so this should be fine :)
You can certainly rule the belt out then, yes.
TISE: Just for your information: on 33rpm everything works just perfectly! So things like the bearinga should affect both speeds, shouldnt it?
Well, yes that should make sense - but then again...I have seen motors running fairly fine on one speed but screeching and whining at the other.
First things would be the trimmer and the solder joints - particularly at the boards connectors.
Okay and how do i check the trimmer?
I can check the board by unscrewing the 3 Screws below the turntable-plate, right?
You go inside from the bottom.Platter off, cartridge off, counterweight off.Beogram upside down on a towel or similar.Losen the three screws holding metal brackets at the back of the Beogram just a couple of turns (DON'T touch the other three screws as theyhold the lid spring).Losen two screws at the bottom plate and take it off.
Does your board look like this?
https://beoparts.com/2014/08/14/beogram-motor-control-circuit-board-pcb-8005023/
The trimmers sits next to the large blue capacitor. One for 33 and one for 45.You could try to give them a shot of contact cleaner and rotate them back and forth a couple of times, but most likely they will need replacing.
Thank you very much for the good instructions!
so just cartridge and counterweight off, cueing arm stays on?
I think at first i will try to cealn the contacts and if this doesnt help i will open the turntable. Should be able to clean them from above, right?
Then i will also have a look which circuit board i have!
Thank you very much, Dillen!
Ah, and shall i use „real“ contact cleaner or am i good to go with isoprop 70/100?