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
Both motors spin, the platter spins. Using the play button, the platter spins for about 5 seconds, the tone arm just sits there, and then it shuts down.
Manually, I can rotate the gear just behind the platter axis (driven by the gear on the platter). If I rotate it full circle, the tone arm moves to the left, then back to the right as it is supposed to do.
I have cleaned up the white lube on the tone arm guide rods and lightly lubricated with white lithium grease.
I applied oil a couple of places in the gear train. The pulley that has the wire belt on it, I removed the C clip and applied oil, moving the pulley up and down on its shaft. I did this because it felt a bit tighter than the plastic gears.
I am at a loss, any guidance will be greatly appreciated.
Steve
Check that the magnet in the solenoid is not jammed in the former. I've never seen it but I'm told that it can happen.
Regards Graham
Thanks Graham. The solenoid shaft moves freely.
It just came to me that the light for the platter is not on. I have no idea if this is important to the tone arm movement.
The bulb measures fine with a DVM. I found the drive transistor (T3 according to the schematic I have). The bulb terminals measure 11.6 and 5.5V, whether the turntable is in play or not. The transistor has 5.5V collector to emitter. The base voltage stays at 0V whether the turntable is in play or not.
There seem to be two issues:
1. Why is the transistor collector fixed at 5.5V, with 0V base? This seems like a very large amount of leakage.
2. Why is there no base voltage? This sounds ominous.
parchping: Both motors spin, the platter spins. Using the play button, the platter spins for about 5 seconds, the tone arm just sits there, and then it shuts down. Manually, I can rotate the gear just behind the platter axis (driven by the gear on the platter).
Manually, I can rotate the gear just behind the platter axis (driven by the gear on the platter).
a possibly stupid question: do you always test with the platter and at least one single record?
If not, the platter runs for a short time to determine the weight of the record, if there is no weight on the platter, the beogram switches off again!
wilfried
Yes, try with a record on the platter.The record area illumination only lights up when using the < and > keys.Not during normal play.You can test the lamp by pressing the > key while the deck is in standby.The light will shine for a few seconds.
Martin
Gandalf and Dillen, you are spot on. I did find the problem with an LP on the platter. What I overlooked was trying it that way after lubricating various spots. The tone arm now does exactly what it is supposed to.
Thanks much,