Question about Sony Walkman WM-D6C Personal Cassette Player

2 Answers

Hello. I just bought a new (probably never used) Sony Professional Walkman WM-D6C. Unfortunately the Walkman runs uneven during playback. I have not tried the recording function because the problem will most likely be the same. I also own an older WM-D6C which is not in mint condition, but it works perfectly. I have used the same batteries in both players. My old Walkman runs fine, but the new one does not. I know that the most common problem with this model is worn out drive belts. However, as this Walkman has hardly been used, I doubt that this is the cause of the problem. I also noticed that that recordings that were made with my old Walkman did not sound as good with the new one. The recordings were made with Dolby C on CrO2 type II tape and played back on the new Walkman with the same settings. I know that there might be sonic problems if you use different brands of cassette players for recording and playback, but this should hardly be a problem with two identical cassette players.The bias setting or the angle of the playback/recording heads should be the same. The serial no. of my old Walkman is 18089, which I believe is very early in the production run. The serial no. of the new, defective player is 244901. I hope you have a theory that can help me with this problem. Best regards, Hauk Kristiansen, Norway

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  • hauk_kr56 Dec 30, 2010

    Hello mlapres,



    Thank you for your answer.



    I have cleaned all the parts in the tape path, including the recording and playback heads, the capstan and the pinch roller. As far as I can see, the only moving parts are the capstan and the pinch roller. This did not solve the problem. Besides, I forgot to mention that the motor is much more noisy than the motor in my old Walkman

    As for the lubrication of parts, I have to ask the seller for permission to do this. If I cannot fix the problem, I probably have to return it to him.



    Best regards,

    Hauk





  • hauk_kr56 Dec 30, 2010

    Hello.

    I don't think there is corrosion in the mechanism of this new player. In any case, a spray of cleaning solution inside should not cause any problems, but I don't own a service manual so at the moment it would be foolish to open the case. It may cause more harm than good.

    Thank you for your advice,
    Hauk

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  • 3,083 Answers

Well, you're right, the drive belt usually is the cause of this problem. Actually, the amount of use of the recorder/belt has little to do with it's going bad, since the reason rubber "glazes" is because of it's loss of oils over time. The belt could still be glazed- be sure to check that. Also, check to make sure all tape wheels are lubricated and spinning freely.
Another common thing that can occur is that electrolytic caps in the power supply circuit can dry out and start failing, providing unsteady voltage, causing uneven recording speed.
You can monitor the voltage to the motor, and see if it's steady.
Good luck, and hope this helps.

Posted on Jan 03, 2011

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It seems that since the player in question has hardly any use on it, then it's likely a simple mechanical problem due to age and sitting still.

Put a drop of light-weight machine oil on each pulley head and each spindle. Also clean the pinch rollers and guides with isopropyl alcohol on a cotton swab. Then without a cassette loaded, run it in fast fwd and reverse for about ten seconds. Then open it back up and make sure that none of your machine oil you lubricated with splattered onto the playback head.

Posted on Dec 30, 2010

  • Mike LaPres
    Mike LaPres Dec 30, 2010

    It's likely then that the motor has taken on simple corrosion that could be remedied with a spritz of tuner-cleaner.

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The recorder was not used for a while. All functions work well except rewind and cue.


Ho riparato molti d6,d6c e altri walkman di alta gamma, aumentando anche le prestazioni se richiesto e se possibile. La mia email: doctor.walkman@gmail.com I have repaired many D6, D6C Walkman and other walkman high-end, improve your performance if required and, if possible. My email: doctor.walkman @ gmail.com

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Who can I send it to for maintenance/repair?


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WMD6C has a pitch control on the back of the unit that can change the speed of the tape, so switch it off, but if that is not the problem then inside the unit it has a servo set speed pot on the main board.
Dave, Electronic Doctors email eledocs@hotmail.com

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