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I have a Kenwood KXW 4060 Audio Cassette Deck. The ?A? deck (playback) is fine but on the ?B? deck (record/playback) the tape occasionally runs too fast. The problem seems to be most likely to occur at the beginning of a cassette and on some cassettes more than others. I am confident that this is not due to tape slippage but to the capstan running too fast ? perhaps twice the normal speed. Additionally even at normal speed there is pronounced flutter. The DC motor is designed to run at double speed when in the ?high speed dubbing? mode. It occurs to me that the ?servo control? may not be operating properly and would appreciate any advice as to how I may correct this. I have the circuit diagram and operating manual as PDFs but can only forward these by email so would require your email address. Address here is ronrsmith5@hotmail.com Ron Smith

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Hi there, I have responded to this problem in the past but have had no comments back.

Please confirm if you have checked the high speed dubbing switch is not playing up intermittently. Also as a first step it might be worth replacing the electrolytic capacitors in the servo circuit.

Is the problem with B deck same whether you are playing or recording tape?
Have you cleaned the play/ record heads and also replaced the drive belt at some stage?

Please check my previous posting to you on this as well.

Posted on Feb 15, 2010

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Are you hearing high frequency flutter or low frequency flutter. This will be the key to figure out what is happening. Please let me know we can then go from there. Look forward to hearing from you Ron.


Dave

Posted on Feb 12, 2010

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It could be some ic's are gone bad. Short circuiting.

Good luck.

Forward PDF to titilayosodipe@live.com

Posted on Feb 13, 2010

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