Teac A-3340: Reverse playback mod

Steerpike · 30th November 2008, 12:09 PM

Is there any reaon why the capstan motor in a Teac A3340 cannot be run in reverse?
It seems to be a very ordinary brushed Dc motor, with two brown wires, no + or - marked, and speed control is done 'outside' the motor.
Yet the label says 'ccw'

xmtrkidd · 19th January 2009, 09:12 AM

According to the book, the wires on the Capstan should be Orange and Yellow. The Yellow should go to an Electrolytic Cap (C6) going to the Frequency switch (50-60 Hz). The only Brown wire I see is in the Tape Speed Switch (SW8).

Looking at the schematic, I would say this motor is not designed to run in reverse, as the primary seems to accomodate two different voltages for the speeds.

xmtrkidd

Steerpike · 20th January 2009, 05:56 PM

You're probably right, and thaks for the input xmtrkidd!
But I made a mistake there with the model number - I have an A-3440 ! And the motors are different.

30th November 2008, 12:09 PM	#1
Steerpike diyAudio Member Join Date: Jan 2006 Location: Johannesburg, South Africa	Teac A-3340: Reverse playback mod Is there any reaon why the capstan motor in a Teac A3340 cannot be run in reverse? It seems to be a very ordinary brushed Dc motor, with two brown wires, no + or - marked, and speed control is done 'outside' the motor. Yet the label says 'ccw'

19th January 2009, 09:12 AM	#2
xmtrkidd diyAudio Member Join Date: Jan 2009	A 3340 Capstan Wiring According to the book, the wires on the Capstan should be Orange and Yellow. The Yellow should go to an Electrolytic Cap (C6) going to the Frequency switch (50-60 Hz). The only Brown wire I see is in the Tape Speed Switch (SW8). Looking at the schematic, I would say this motor is not designed to run in reverse, as the primary seems to accomodate two different voltages for the speeds. xmtrkidd

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20th January 2009, 05:56 PM	#3
Steerpike diyAudio Member Join Date: Jan 2006 Location: Johannesburg, South Africa	You're probably right, and thaks for the input xmtrkidd! But I made a mistake there with the model number - I have an A-3440 ! And the motors are different.

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