Question about Denon DRM-740 Single Dual Cassette Deck

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The pressure roller on my reel all of a sudden stopped and now when I press play it won't grab the tape and start but if I wait at some point it will start but then it releases the pressure roller back again and it stops playing what gives? thanks

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  • Denon Master
  • 5,011 Answers

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.

Posted on Feb 06, 2010

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HOW DO I PUT THE TAPE THROUGH THE REEL TO REEL


Reel-to-reel decks usually run left to right. Put full reel on left hub, take-up reel on right hub. Feed tape across read / write heads, and between pinch roller and spindle. Take end of leader tape, wind carefully around take up reel until it is secure. Press play.

Nov 30, 2015 | Audio Players & Recorders

1 Answer

I Press Play Button, And Tape Goes Into Fast Forward Mode


Pinch Roller linkage is stuck. Clean and regrease and it will work right again- I have done hundreds of them

May 01, 2012 | Teac Audio Players & Recorders

1 Answer

I put a tape in and it keeps flipping sides without playing and pops out and says Error. It even does it with a CD-Cassette Adapter. Before the Cln came up and I pressed on the eject button and that...


Cassette decks have sensors on the reels which tells the deck when the tape is at the end. When the reel stops the deck switches the direction of the tape and sometimes the position of the head(depending on the deck design). Most common problem is the tape is hard to turn, or the deck won't turn it ( deck thinks it's at the end, click, still won't turn, click, won't turn, click) you should fast forward and/or rewind your tapes from start to finish once in a while to keep them lined up(narrow spool/less friction), you shouldn't have to but it works. BUT,...your problem sounds like a slipping or broken belt/or dirt causing the problem. Take the deck out to have a look and clean the capstans(rubber rollers)belts,heads with alcohol and a Q-tip while your at it. Dirt's usually the main culprit and if you do have some other problem, cleaning it is always a win/win (It will also sound better clean)

Sep 20, 2011 | 1995 Buick Regal

1 Answer

The auto stop mechanism seems to have completely stopped working. When play a cassette, it eats it. When you put the deck into play mode without a cassette and push on the pinch roller with your finger, it...


When's the last time it was cleaned? It surely needs it now.

Never touch the any part of the transport that directly contacts the tape with bear fingers.

This sounds like a failure of the take-up (left) reel to take up slack as it's fed in by the capstan.

You can probably trust the machine to fast forward or rewind a tape to test the ability of the reels to manage slack since either action only requires one reel to pull while the other just coasts. Failure would look like stationary tape that eventually would time out and reset the command.

If it won't do fast transport motions that eliminates the capstan/pinch roller.

If it CAN FF and REW then the capstan, pinch roller, heads or something is probably glommed up with sticky tape oxide, which brings us back to the first question.

Jun 30, 2011 | Panasonic RX-FS470 Cassette Boombox

1 Answer

Tascam 644 When I press play it won''t stay on play, it stops. It will rewind and fast forward but that too stops by itself.


Scott has a point. You need to determine what is causing the unit to stop and it could be a bad cam motor belt if it has one or the lack of take-up die to the bad idler or even a dead spot on the reel motor. The reel motor will work normally at high speeds due to inertia but at low speeds as are used in play the dead spot of the motor can become much more apparent.

Sep 17, 2010 | Tascam 122MKIII Single Dual Cassette Deck

1 Answer

I have a Sony TC 630 Reel to Reel Stereo Tapecorder..Pinch Wheel is sticking and will only move when forced and brushes as well...Any help ?


Sounds to me like your Sony has a common problem among vintage reel tape decks..dried /frozen grease/ and or a lack of lubrication. carefully apply a tiny bit of fine lube oil, like 3in1, on the swing mechanism that carries the pinch roller...(you may have to remove the front metal deck face to fully access the swinging pinch roller mechanism) ) . do NOT get any oil on the rubber pinch roller..(best to make sure after by scrubbing the pinch roller surface with a cotton swab lightly dipped in non chemical household cleaner, like 409, or awesome orange i get at the dollar store. Then use the dry end of the swab to ensure the pinch roller is dry. .The pressure pads should swing upward and press the tape against the heads when in play/record mode..if they do not swing up, they are binding/ or out of adjustment....they are spring loaded so when the reel deck is in the stop position the spring loaded pressure pads are held down...play/record mode releases them to freely swing up and press on the tape against the heads.

May 11, 2010 | Audio Players & Recorders

2 Answers

The unit is eating up the tape!


Generally speaking, there are two reasons this happens.

[1] tape recorders have to move tape past the record/playback heads at a highly consistent and accurate rate of speed. What makes this possible is a rubber "pinch" or pressure roller and a spinning metal spindle. Tape is routed between the roller and the spindle, and when the recorder is in RECORD or PLAY mode, the roller presses the tape against the spinning spindle, causing the tape to move from the feed reel to the takeup reel. When the pinch roller and/or the spindle become coated with oxide particles shed from old tapes, they get sticky and the thin tape will begin wrapping around one or the other. THE SOLUTION is to get some cotton swabs and rubbing alcohol and clean the oxide (brown from cheap tapes and dark gray from better tapes) from both of these parts.

[2] many tape recorders use rubber belts and pulleys to turn the feed reel and the takeup reel. If the tiny rubber belt that makes the take-up reel turn is stretched, it will not wind moving tape fast enough, which causes tape to bunch up. If this is the problem (you will not be able to see the belts without removing the recorder's outer case), then you might as well junk the recorder.

If you see that the part of the rubber drive roller that contacts the moving tape has a ring of brown or gray coating on it, you

Feb 19, 2010 | Sony TCS-580V Handheld Cassette Voice...

1 Answer

Sony reel to reel TC -765


I too had this problem with my tc765. I found the two pinch rollers were not lifting up and fully pushing the tape against the rotating capstans in the play/record mode. Solution to my problem involved partly dismantling the pinch roller assembly, cleaning off the old solidified grease and re-lubing with a molybdenum grease. Note: the top plate has to come off first,then the rotating guides and tensioning pegs. Then the cast head cover and flap. It was a time consuming operation, but well within the scope of competent DIY in my opinion.

Sep 24, 2007 | Audio Players & Recorders

3 Answers

Tape won't load.


This is a problem with the process called 'tape loading' - pulling the tape loop out of the cassette and wrapping it around the spinning video drum, engaging the capstan and pinch roller and reel rotation. With the cover off, observe the behavior when you hit play. (You may need to put a piece of cardboard over the cassette to block external light from interfering with the start/end tape sensors). Assuming this is a basic VCR (no instant start features), you should see: 1. The video head drum begins to spin. 2. the roller guides move smoothly on the tracks, wind the tape around the drum, and stop snuggly pressed against the 'V-stopper' at the end of the tracks. 3. The pinch roller moves into position and presses the tape against the capstan. 4. The tape begins to move and is wound up by the takeup reel. 5. The picture and sound appear on the TV. With a 'rapid or quick start' (or it may be called something else) transport, the tape moves to a half-loaded position when the cassette is inserted. This is at an intermediate position partially pulled out of the cassette but not wrapped around the drum. On VCRs with a real-time counter and/or index search capabilities, the tape will be in contact with the control head. With an 'instant start' transport, the tape will fully load around the spinning drum when the cassette is inserted but the capstan will not engage and no tension will be applied to the tape until you press PLAY or REC. (After about 5 minutes, the drum will stop and it may unload to the half loaded or unloaded position.) Note that for VCRs with a real-time counter and/or index search capabilities, the tape must be in contact with the control head (but not the video heads) for all relevant modes. These VCRs (which include many modern units) must therefore pull the tape at least partly out of the cassette. In all cases, the completion of the sequence results in approximately the same mechanical configuration during PLAY. Several likely possibilities when it shuts down: 1. Everything occurs as above, picture and sound appear for a few seconds, but then the VCR unloads the tape, ejects the cassette, goes into REW mode, stops, or shuts off. Two common causes: The takeup reel does not turn and tape spills into the machine. This is sensed by the microcontroller which aborts record or play and attempts to save your valuable cassette. Most likely cause: old/dirty idler tire. As a test, turn the idler tire inside-out. The fresh surface will now work well enough to confirm this diagnosis and will continue working long enough for your replacement idler tire to arrive. See the section: "General guide to VCR cleaning and rubber parts replacement". The takeup reel is turning properly but one of the reel The takeup reel is turning properly but one of the reel rotation sensors or its electronics is defective. As a test, check to see if the tape counter is changing at any time during the loading and

Dec 12, 2005 | Emerson EWV603 VHS VCR

2 Answers

Doesn't repond to buttons and stuck on rewind


This is a problem with the process called 'tape loading' - pulling the tape loop out of the cassette and wrapping it around the spinning video drum, engaging the capstan and pinch roller and reel rotation. Check all the belts above and below the deck. Belts can appear to be firm but if they do not return immediately to their relaxed length when you stretch them 25%, they will need to be replaced. With the cover off, observe the behavior when you hit play. (You may need to put a piece of cardboard over the cassette to block external light from interfering with the start/end tape sensors). Assuming this is a basic VCR (no instant start features), you should see: 1. The video head drum begins to spin. 2. the roller guides move smoothly on the tracks, wind the tape around the drum, and stop snuggly pressed against the 'V-stopper' at the end of the tracks. 3. The pinch roller moves into position and presses the tape against the capstan. 4. The tape begins to move and is wound up by the takeup reel. 5. The picture and sound appear on the TV. With a 'rapid or quick start' (or it may be called something else) transport, the tape moves to a half-loaded position when the cassette is inserted. This is at an intermediate position partially pulled out of the cassette but not wrapped around the drum. On VCRs with a real-time counter and/or index search capabilities, the tape will be in contact with the control head. With an 'instant start' transport, the tape will fully load around the spinning drum when the cassette is inserted but the capstan will not engage and no tension will be applied to the tape until you press PLAY or REC. (After about 5 minutes, the drum will stop and it may unload to the half loaded or unloaded position.) Note that for VCRs with a real-time counter and/or index search capabilities, the tape must be in contact with the control head (but not the video heads) for all relevant modes. These VCRs (which include many modern units) must therefore pull the tape at least partly out of the cassette. In all cases, the completion of the sequence results in approximately the same mechanical configuration during PLAY. Several likely possibilities when it shuts down: 1. Everything occurs as above, picture and sound appear for a few seconds, but then the VCR unloads the tape, ejects the cassette, goes into REW mode, stops, or shuts off. Two common causes: The takeup reel does not turn and tape spills into the machine. This is sensed by the microcontroller which aborts record or play and attempts to save your valuable cassette. Most likely cause: old/dirty idler tire. As a test, turn the idler tire inside-out. The fresh surface will now work well enough to confirm this diagnosis and will continue working long enough for your replacement idler tire to arrive. See the section: "General guide to VCR cleaning and rubber parts replacement". The takeup reel is turning properly but one of the reel

Nov 29, 2005 | JVC HR-VP670 VHS VCR

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