Attached are photos of either side of the circuit board that contains the motor windings and the hall sensor, and a close up of the hall sensor with a ruler for scale. Also attached is the data sheet for the hall sensor.
As far as how the tech diagnosed the issue, if I'm remembering correctly he said he wasn't getting a signal at the transistor(s) that the hall sensor feeds.
Thanks,
Clark
As far as how the tech diagnosed the issue, if I'm remembering correctly he said he wasn't getting a signal at the transistor(s) that the hall sensor feeds.
Thanks,
Clark
Attachments
I was just corresponding with someone in Belguim who is selling some Revox capstan motors which I was considering buying to harvest the hall sensors. He pointed me at a seller in Poland who is selling these:
https://www.datasheets360.com/pdf/1267841659376091285
It looks like the right physical dimenstions, and has the right pin-out.
The seller is charging about 11USD for 10, but shipping to the US is 50USD. It would be worth it to me if it would be a good replacement.
Any thoughts?
https://www.datasheets360.com/pdf/1267841659376091285
It looks like the right physical dimenstions, and has the right pin-out.
The seller is charging about 11USD for 10, but shipping to the US is 50USD. It would be worth it to me if it would be a good replacement.
Any thoughts?
First check the signal in running condition of the assembled motor, the sensor is used to sense movement of the magnetic poles.
May be a broken wire, and check the transistors themselves with a square wave input, some new DMM can give that sort of signal.
And if broken, and the specs match, ask the seller in Poland to pack securely in cushion foam in side a plastic box, and send by air mail, recorded delivery.
Won't be more than 10 US.
May be a broken wire, and check the transistors themselves with a square wave input, some new DMM can give that sort of signal.
And if broken, and the specs match, ask the seller in Poland to pack securely in cushion foam in side a plastic box, and send by air mail, recorded delivery.
Won't be more than 10 US.
Just had a look on 'thebay' and someone is selling capstan motor control boards for the Revox 710 cassette player. >> REVOX B710 MKII << Right Capstan Motor Driver PCB Tape Deck Parts /RD278 | eBay
I checked with the service manual and they appear identical to the ones needed.
Good Luck
I checked with the service manual and they appear identical to the ones needed.
Good Luck
check out this thread:
Dual EDS 1000-2 defekt - hall ersatz? - DUAL << Plattenspieler und Plattenwechsler >> DUAL - Dual-Board.de
there is reported step by step (and good pictures), how the SBV566 is to replace by a currently available replacement.
I think, it doesn't matter, that the motor is another model - the used hall generator is the same - at least according this thread.
Dual EDS 1000-2 defekt - hall ersatz? - DUAL << Plattenspieler und Plattenwechsler >> DUAL - Dual-Board.de
there is reported step by step (and good pictures), how the SBV566 is to replace by a currently available replacement.
I think, it doesn't matter, that the motor is another model - the used hall generator is the same - at least according this thread.
i have a NOS Papst GS 38.09 I can sell you, if you're interested? PM me.
Cheers,
Mike Spence
here are the low resolution data sheets so as the circuit diagram
Attachments
under
Papst GS38 GS 38.09 3809 in which turntable models in use and what motor replacement?
I have listed some other models of record players/turntables, where are this motor in use.
In post #12 there is to find an information concerning an offer with image of brand new DC motor parts of this model.
Papst GS38 GS 38.09 3809 in which turntable models in use and what motor replacement?
I have listed some other models of record players/turntables, where are this motor in use.
In post #12 there is to find an information concerning an offer with image of brand new DC motor parts of this model.
Papst GS 38.09 - own created Schematic
as supplement my own schematic with values for voltages while rotating (for better understanding the theory of operation and more success by troubleshooting).
Hi Mike, have you parted with this motor yet? I have a ST-8 that I have cherished for years and the motor bearings are now shot. I've been looking to a replacement motor to swap out but haven't had much luck.
Regards,
Christopher G
Are they sleeve / bush bearings, or roller / ball bearings?
You do get sintered bearings (bushes) in many sizes, quite common in kitchen mixers, drills and so on.
Just search by size and shape.
They are generally push fit, and brittle, use some sort of screw jig or a press to remove and fit.
Soak the new ones in oil overnight, and grease before fitting.
Those are 25 cent items here, shame to scrap a good motor for that.
Changing time is minutes, provided you can open it, old motors can have stuck bolts and so on.
You do get sintered bearings (bushes) in many sizes, quite common in kitchen mixers, drills and so on.
Just search by size and shape.
They are generally push fit, and brittle, use some sort of screw jig or a press to remove and fit.
Soak the new ones in oil overnight, and grease before fitting.
Those are 25 cent items here, shame to scrap a good motor for that.
Changing time is minutes, provided you can open it, old motors can have stuck bolts and so on.