Question about Denon DM37S 2 x 30W Silver Micro Stereo System with iPOD PORT USB 24Bit D/A Converters RB
Has problem with some CDR discs. After spinning disc for 10-20 secs, screens shows "00.00" and stops.
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Posted on Jan 02, 2017
SOURCE: TOC ERROR ON DENON DN-C615
Take this info with a grain of salt. I recently received one of these units with a TOC error, and after removing the drive assembly and reinstalling it, the problem went away. Before removal, I observed the motor spinning poorly and even backwards. Rather than pull the whole drive assembly, I would first eject the drive and remove the face from the tray. This is done by putting your thumbs on the tray and pulling up with your pointer fingers underneath the face. It should just snap off and snap back on the same way. Try playing a disc now, if it works try loosening the screws on the drive assembly and shifting the assembly towards the front of the unit, tighten the screws and put the face back on. You should be good to go. There are four screws holding the assembly down, the two in the back can only be accessed when the tray is in the open position. The front two are accessible through holes in the tray, and I don't recall if the tray has to be open or not, but that's easily observable. If it's still not working, there is a flat-flex cable running to the laser assembly. Pull and reseat this gently. Try to only manipulate the cable by the blue reinforcement tab. I hope this helps!
Posted on Nov 30, 2008
Manually cleaning the lens
To locate the laser lens, look around the door or drawer of the DVD player and you will see a small circular disc, which is often called the turntable or disc platter. Right off the edge of the platter you should see a small clear lens. There are some manufacturers that have had problems with the lens, depending on the age of the unit. In these problem players, moving the unit to a different location, turning the unit upside down, or sometimes even without moving the unit, the lens can become detached from the laser assembly and floats around inside the unit. You can re-glue it back with a little crazy glue, BUT it must be perfectly centered, and without getting any glue on it. So, if you don’t see the plastic lens, but instead see the laser pick-up assembly, look around for the lens inside the unit and glue it back on.
To clean the lens you must use very little pressure. Take a cotton swab and barely moisten it with plain, non-scented, or oily type alcohol. In a swirling motion, very gently rub the lens until you’ve covered it entirely. Then repeat using the dry end.
If the cleaning didn’t help, don’t despair just yet. You can see if there’s a problem elsewhere in the unit by using a few simple tricks and tips.
First thing you want to see if the unit’s laser is in good working order. This method isn’t foolproof, but most of the time works admirably. When you insert a disc, see if you can look up underneath where the disc sits on the turntable. Observe the laser lens going up and down. If the lens is trying to focus, that’s good! After a few seconds of the lens trying to focus, the platter should start to spin. On almost every CD/DVD unit I've encountered, the unit won't spin unless the laser has properly focused on the surface of the disc. If the unit spins up and and then shuts down, you should check and make sure the laser pick-up assembly slider mechanism is working without any obstructions and that the small chrome rail that it slides on is slightly greased. Don’t go overboard with the grease though, as too much can cause all sorts of problems.
The slider mechanism, depending on the age of the unit and the manufacturer, consists of the small chrome rail, a drive motor, a small gear assembly, and (in some units) a small belt that drives the slider unit via the motor. This small belt causes all sorts of problems. If the belt is broken or slipping, it can cause skipping, dropouts, or simply no start up at all. Also, if the belt breaks in the middle of the disc, the drive mechanism gets hair or dirt wrapped up into the gears, or the pick-up assembly doesn’t return to the start position (called home), the unit will (99% of the time) refuse to release the disc, causing it to become stuck inside the unit. There’s a little micro or leaf type switch located at home position that sometimes gets dirty or breaks and, causing this problem also.
If the disc starts to spin slowly and doesn’t come up to speed, the spindle motor that’s attached to the turntable platter is a common problem. There could also be a problem with the spindle motor driver controller IC or the power supply regulator that supplies voltage to the driver IC. If the disc starts to spin and then spins really fast, or stops and starts to spin backwards, your problem is the laser pick-up assembly or the servo control circuit. If you continue to have problems after cleaning and checking the other things listed above, you may have a problem with the player's alignment. Of course, one of the problems you'll face checking alignments on a DVD/CD player is that you’re going to need to use an oscilloscope on most of them. If you have the proper tools and equipment, the first thing to look at is the RF pattern of the unit while its playing. It should be a sharp and clear pattern. If it's dull and smeared, then the laser could be weak.
Also, in these units are very critical alignments called the focus/tracking gains and offsets. When these alignments are off, it can often cause intermittent troubles. As the unit ages and parts change value, so do these alignments, and will need to be checked. In my time as service technician repairing DVD/CD players, 65% of the laser pick-up assembles I have tested were good and only needed a small adjustment. Today's technology makes it unfeasible for a shop to hook up a DVD/CD player, and even some recorders, to their equipment and make these adjustments because of the cost involved.
hope this may help;
DON'T FORGET TO RATE;
Posted on Jan 11, 2009
If your unit has some time on it it probably has a dirty lense on the laser assembly. This isn't difficult to clean but you must exercise care not to damage any components of the laser assembly. Unplug the unit. Remove the top cover. If the disc drive has a cover, remove it. You should see the lense, looks like a fish eye, looking up at you. The lense is monted on a set of springs and will move around as you clean it. This is normal but do not apply anymore pressure than necessary. The alcohol will do the work loosening the dirt. Using 200 proof grain alcohol, available from any electronic parts supplier (www.mcmelectronic.com) and commercial grade, lint free, cotton swabs, also available at MCM, moisten swab and gently touch the lense rotating the swab head. Use a dry swab after the wet one. Blow dry the assembly with canned air, also available at MCM. Reassemble unit and you should have a working player. If you still are not reading discs you could have a defective or weak laser assembly. This would have to be replaced with a new unit. I hope this has helped you. Let me know if you need any more assistance.
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Posted on Feb 13, 2010
A few small things to try. Turn off unit, unplug for 5 minutes, plug
back in, turn unit on.
There is a product called a cd/dvd lens cleaning disc. Worth the investment to have around.
Sometimes spindle dvd blanks have a few bad ones.
Check manual, might describe exactly what types of dvd blanks are best to use with the unit.
Just some suggestions, hope this helps.
Posted on Apr 28, 2010
Tips for a great answer:
Sep 15, 2013 | Denon DN-1800F CD Player
Apr 23, 2012 | Denon DN-S700
• Only audio CD-R/RW discs can be recorded with this unit. "Use Audio CD" will be displayed when a disc other than one
for use with audio such as a CD-R/RW disc for use with a personal computer or another type of disc is loaded. (See "Discs that Can Be Used with this Unit" on Page 5.)
• CD-R discs can be recorded to only once. The recorded information cannot be erased.
• The recorded information of CD-RW discs can be erased. When this disc has been finalized, erase after the finalization removal operation has been performed. (See "Cancellation of CD-RW disc finalizing" on Page 28.)
• Recording mistakes made with CD-R discs cannot be erased; therefore, it is recommended that a CD-RW disc be used until you are accustomed to the recording operation.
If you desire 74-minute blank disc just Google "cd-r audio 74". The unit will also use 800MB 80-minute CD's.
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