Thank you! bearings is allready changed, but it not helps. Are you sure that there is not DC braking? I measured DC on motor by rewinding, it is 9v DC. Also when I disconnect motor from electronic, tape tension goes down.Since the motors are not electrically braked when winding, the bearings of the motors and pulleys could be stiff. If these have never been exchanged, they should definitely be exchanged. I had installed Skf E2 bearings.
Thank you for advice of SKF E2 bearings. Its low friction bearings, and it is important in tape recorders. I will try it.Thank you! bearings is allready changed, but it not helps. Are you sure that there is not DC braking? I measured DC on motor by rewinding, it is 9v DC. Also when I disconnect motor from electronic, tape tension goes down.
Thank you! I measured to. In Winding back mode is it 53V more less, as yours. And this voltage not depended on Tape tension balance position. I investigated schematic, and found that relay SB can disconnect tension balance from ASZ18 basis. And this voltage on emitter (in back wind mode it is connected to motor) is set by resistors on basis R3 and R14. So i will try to make tension less to increase resistor R14. May you check on your machine, if this voltage on motor in Back Winding mode not depends on Tape Tension Balance?I had time to check Voltage on the right Torque Motor.
Stop - 67V DC measured to Ground
Play - 55V (more break) to 65V (less break), depends on Tape tension Balance
Winding forward - 62V
Winding back - 52V
The internal Meter, Position 5 - Bremsstrom stands at 1 during winding.
Short Break after Winding about zero Volt.
I hope this helps.
Thank you!Tension balance is undependent in winding mode, SB relay works as you say.
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