I had the same problem before, found one of the wire connect to the battery was break at the PCB end.
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The other thing you may want to check is the motor bushing. Gently, with your fingers, see if you can feel any side play.
The maxon motor will do all kinds of weird things when it gets loose. Checking the main bearing is as easy as spin it without the belt. If you have the original wall transformer(non battery style) you could bypass the battery to check.
There use to be a schematic on the web but if the controller is bad trying to figure that out would get involved.
Thanks to all for your comments
Imhififan, I will check the wires more closely. Didn't see anything broke. But my eyesight is pretty bad.
Lak, I had planned to message Doug if he didn't show up at the thread. but I had forgotten about Lew. Many thanks
Tom, Indeed there is a very small amount of play in the pulley. Not sure of its effect. But if the Maxon motor is as finicky as you indicate, it may be the problem. I looked to see if the plastic pully was held by a set screw which was loose. But I didn't see a set screw. So I'm guessing it is mated to the metal via pressing or some other route.
FWIW, I unplugged the charger this morning to see if the lights still flickered every 10-11 seconds as previous. They did. Just sitting at idle with no power running to the motor, the flickering continued. So I felt as if that may show that the charger is not part of the problem. Then too, I may be missing something in my thinking.
Also, I played several albums last night without one incident of slowing down. Lights still flickered every 10 seconds though. Another anomaly was that at the beginning of the record,the motor would come up to speed as normal. Then after the green light was steady, the red light would flash 12 times. Then the green light would flash once or twice. Then the green light would become steady and the music played through without problem. Considering the sophistication of this motor/controller, it seems to be trouble shooting itself and giving a code. The problem is, I don't know what the 12 flashing red lights mean nor the flickering every 10 seconds. I think I need an interpreter who speaks Maxon......or Teres.....or a combination.
My gut instinct tells me its the battery, even though the numbers show it working good. I'll take another look in the case for broken wires before ordering one though.
Again, much thanks to all
Lak. I will do my best to keep the info I get available. I haven't done much yet since it was Memorial day weekend and I awoke yesterday with a sore throat etc. The pharmacist suspects allergies. So I didn't get the Dayquill which I went after.
Anyway, I will keep the thread informed of my findings. Batteries are pretty cheap and this one is close to its life expectancy. So I will probably go that route along with trying to contact Doug, Lew and Chris Brady. I also thought about Tom from Gablier. I suspect they may use a similar style motor. & controller. But I'm not sure
OK. So I tried a new battery. The lights on the motor still flicker just as they did previously. I was really hoping this would be the fix. I've been fighting a sinus infection with headaches so I have only played one record. I didn't hear any slowdowns in that record. But the red light did flash 12 times as it previously had done somewhere into the 1st track.
FWIW, I did check the wiring inside the controller/battery box for loose or broken connections and found nothing
I haven't tried contacting Chris Brady or Doug, et al yet. This is my next step. I may also try pulling the platter and replacing the oil in the bearing since this was my initial impression before seeing the light show. My manual says to use 30 weight oil. But I believe there may haven been an update on the oil to be used in the battery.
Does anyone know what the proper bearing oil for the Teres 340 is? Was there an update on this?
I have a 255 and use transmission fluid in the bearing. I have been able to reach Chris in the last few years. It takes a few weeks sometimes, but if I'm persistent it pays off.
My problem was the bearing had worn down so that the ball was riding against the brass on the thrust pad--around the edge of the teflon insert. This happened twice and the second time Chris built me a new thrust pad with teflon recessed above the level of the brass.
I'm using a Verus, so no idea what the lights on the motor mean.
BTW, FWIW, for you Certus /Verus drive guys. The lights in the belt drive indicate when the motor has come up to steady speed. A steady green light indicates a steady 33 1/3 RPM. The red light comes on at start up and then goes out when the green light comes on. The red light coming on in the middle indicates it has lost the steady 33 1/3 RPM.
Thus the oddity of both of them quickly flashing when the TT is not running.
I may remove the platter to check the sensor under the platter which has a strobe on it. it may be as simple as a piece of dust on the sensor since I suspect it is an optical sensor which "sees" the strobe on the bottom of the platter.
Good News. Chris Brady returned my email last night. It was a quick response I might add, which is good for us Teres owners. He said that the lights flashing is normal and that they had always done so but I just hadn't noticed. Duh. My bad. I had never noticed them before. So much for my observance skills.
He suggested that my battery might be weak and replacing it might be in order. I have done that already but haven't had time for listening very much yet. He offered assistance if I needed more help in troubleshooting.
Another feature of the battery supply which he told me about was a jumper to bypass the battery and run on AC. I haven't checked my manual for details as he suggested. But that is a very nice option IMO
More good news from Chris was his final statement, "We are still in business but have scaled back significantly."
FWIW, I was very appreciative that Chris replied so quickly. It is reassuring to have the help of the designer and builder of such a sophisticated motor/controller setup .
Take heart Teres owners .Apparently we have not been left out on our own. That's good news