Question about Denon DRM-740 Single Dual Cassette Deck

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Denon DRM 740 tape does not play

I recently returned from Peace Corps service and unpacked my stored Denon DRM-740 and found that the motor wont drive the tape when it is in play mode. The motor takes up the slack in the tape and then stops. In fast forward or rewind there is no problem driving the tape. What is the likely cause of the problem? How much repair likely cost? And is this a repair I could do on my own with little electronics repare expierence? Thanks. Ecuador PC

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  • dandruff Mar 28, 2008

    i have the same problem with my drm-740. starts and shuts right off. problem is, that putting any amount of money into a tape deck in this day and age seems very silly. i hardly used the thing, paid way too much for it when i bought it, and now it doesn't work. should have bought what my brother bought, a yamaha tape deck. oh well, you live and learn-but if anyone has any suggestions, it would be nice to hear. btw, my nakamichi car deck always sounded better than the denon anyway.

  • giorgitd Oct 09, 2008

    Mine is the DRM-700 model. FF and REW perfect, but press PLAY and the head engages, but the tape fails to move and the head disengages. Is this a drive belt? Perhaps the machines senses no tape motion and refuses to leave the head in contact with tape?

  • 4germs2 Jan 03, 2009

    Hello there,

    I seem to have a similar problem:

    After several years of not using the tape-deck, it now shows the following behavior:

    1. NO SOUND whatsoever in PLAY mode (whereas tape turns visibly)

    2. FF and REW work perfectly

    3. PLAY mode runs for about 5 sec and terminates itself

    4. pressing STOP in PLAY mode causes only a DELAYED (>2sec) reaction, whereas ins FF ans REW modes STOP works instantaneously.
    Certainly no 'dirt' or similar problem, more like an interlock or mechanical failure (head without contact to tape) is my guess.

    Thanks for any advice with better than 1 sigma chance

    Reiner from Germany

  • LjRauso Jan 24, 2009

    1. When play is pressed the unit goes for a 6 count-NO sound then stops. Rewind ,ff, pause will not work during this time. If play is press a zillion times the unit then works. Ifit sits a few hours , back to the same old symptoms. cleaning heads,  pinch rollers does not help.



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Just bought a unit from a thrift store. Found same problem; FF & RW OK, but play engages then stops. Also noticed buzzing noise when power turned on. Opened unit, found broken capstan drive belt. FF & RW driven from different motor. Buzz was drive motor running freely with no load - when power is on, capstan is driven all the time for fast play/record start. Replaced with rubber band, and it works --- now looking for replacement belt.

Posted on Feb 12, 2009

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I have the exact same problem with my DRM 740 as the post above.

FFW and RW are fine, but once play button is pushed, the head engages then quickly shuts down.

I've cleaned the deck twice and no change.

The deck had been A-OK since day one prior to this problem.
Any suggestions before sending it out.

Thanks, Jack

Posted on Mar 16, 2008

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Your set needs to be clean use alcohol do the cleaning with some cotton good luck.

Posted on Apr 14, 2007

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Denon DRM 740 tape does not play

hmmm...sounds like the transport motor/foot are it up, and inspect around those items(where the tape actually clamps down) and see if you can see anything in there. Might even be a bug, no fooling..

as to are most likely talking some major money, and a long time in the repair depot, which I believe is in Rio..I'll check that for you while you do this part.

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There will be either on the motor or on the circuit board where the motor power comes from a preset. images below of what they might look on the board. One of these might be found in the motor, but hidden from view. All you might see is a slot in the bottom of the motor. This could be covered with a sticky label to prevent access.

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The unit either needs a new belt, Capstan bearing oiling as in taking the flywheel out and if this does not fix it a new capstan motor. The motor is adjustable with a small screw driver provided you have the appropriate wow and flutter meter and test tape to do the job.

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This may mean the takeup reel is intermittent or that he cam system of the transport is not getting the correct feedback. I have hd some decks that had very little back tension and they would skew tape- and the audio would be gone before they would shut off. The deck need restorative work done to it and now is the time before is eats all your tapes up.

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Sounds like a mechanical fault, you need to look around to see if anything has broken or fell off. Some decks use a solenoid to move rollers up and down, that could have a fault on it.

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Required free service manual of DENON DRM 740 The system hangs after WELCOME


You can free download sm from elektrotanya:

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You can identify rotation direction of the motor and order one from this site

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