Fixing Circ Error On Dvd
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or digital versatile discs or DVDs. Scratches may or may not affect how a disc plays and ultimately it depends on whether the error correction system associated with optical disc technology can handle the problems generated by dvd player says disc error a scratch or scratches. To simplify things, the type of scratch can fall into one
How To Fix Scratched Xbox 360 Games At Home
of two categories: a radial scratch or a scratch that is circular. A radial scratch is perpendicular to the direction of play (like
Dvd Player Skipping No Scratches
a spoke in a bicycle wheel) and is less problematic because the error correction system can deal with these scratches fairly easily. The errors created because of the radial scratch are random in nature as the disc
How To Fix A Scratched Xbox 360 Disc Perfect Circle
plays and these are dealt with efficiently by the technology. Circular scratches follow the direction of play of the disc. Errors created when a disc is played with small circular scratches are a challenge for the error correction system because there is a lot of damaged data in sequence, but generally the errors can be corrected. Large scratches in the circular direction are much more problematic and often lead to playability problems or complete how to fix a cd player that won't read disc failure.Below you will find screen shots from the error analysis of a DVD disc with no scratches, radial scratches, and circular scratches in order to see the effect that scratches have on the playability or readability of optical media.Error analysis of a DVD disc with no scratches Error analysis of a DVD disc with a radial scratchAs you can see, there is a slight increase in errors when comparing this screenshot with the one above (i.e. no scratch analysis). Both the top pane and bottom pane of the screenshot indicate different types of errors and in both cases the radial scratch has caused a slight elevation in the amount of errors. Error analysis of a DVD disc with a circular scratchAs is clearly evident from the screenshot below, the circular scratch has caused a large spike in errors. In fact, the red section in the bottom pane indicates a critical state of uncorrectable errors. Even though the circular scratch was the same length as the radial scratch in this sample, the effect on the disc was signficantly different and much more detrimental. Scratches Generally Caused by Poor HandlingThe types of CD or DVD optical disc scratches discussed above are generally caused by poor handling. An example of poor handling is not storing the discs in jewel cases when they are not
file to her desktop, she would get the same error, informing herthe file could not be copied due to some type of corruption. dvd player cleaner She wanted to know if I could possibly help. I opened the cd isobuster in my own cd-rom drive and tried copying the file she was having a problem with and I realized it couldn't be copied on my system either. Therefore, in all likelihood, itwas the cd itself that was problematic, not the system, player or other hardware. The error received when trying to copy the file http://www.digital-scrapbooking-storage.com/circular-scratches.html was a cyclic redundancycheck (CRC) error. In fact, this is the most common error encountered with cd/dvd access or copying problems and I knew that such a problem was often caused by a dirty or scratched disc, so I examined the surface of the cd and just as I suspected, it was marked. It had a distinct smudgeprinton it. I cleaned the whole cd and after doing so, http://www.percontra.net/archive/2corruptcddvdrecovery.htm voila! ,I was able to copy the needed file from the cd to my hard drive.I informed her that the problem was fixed and when I told her it was just a matter of cleaning the disc, she was surprised that the solutionwas so simple and never thought such a confoundingproblem could be caused by a less than pristine condition cd. The fact is that cds and dvds can be very finicky. Just one speck of dirt or a hairline scratch can cause problems in accessing your data or the disc itself. These marks can make it difficult for the drive's laser beam to properly read the disc. Fortunately, dirty discs can be cleaned. Scratches can be more problematic, though, in many cases they can be repaired. With scratches, the severity of the problemdepends muchon the type and location of the scratch.Scratches that run across the disc or along the track, as opposed to those that run in a straight line from rim to center, can be the most difficult to repair. These type of problems are unique to cd and dvd media because the surfaces of the discs are bare and exposed, offering no protection against dust, finger prin
am going to take you through on how to troubleshoot and repair this kind of fault. BUT FIRST A BRIEF OVERVIEW OF A DVD PLAYER: When you open a DVD player you find that they have a lot of http://www.electronicrepairguide.com/how-to-repair-dvd-player.html similarities in design between different models with very little variation between different models almost to the point of component level. Therefore if a technician understands one model pretty well then you will have no problem when a customer brings http://www.wikihow.com/Repair-a-CD-With-Toothpaste a different model to you shop. Basically all DVDs have three main modules (units) which work together in harmony as shown in the figure below. We have the Power Board which is usually S.M.P.S but in old dvd player ones they used to have special types of transformer with many output to supply the power to the other circuit. Next you have the Loader which houses the Pickup and then the Decoder (electronics board) all interconnected by use of wires (conductors) or ribbon connectors. So let assume you have received a DVD from a customer with the No Disc error, first before opening up do some initial test. Open the drawer and load a Music Disc which how to fix you are sure it is not scratched or defective…if the DVD open and closes the door fully then we can conclude that the doors are okay. Then listen above the loader for the sound of disc spinning, the way the disc spins can tell you a lot if the spinning is healthy or not. The disc should spins smoothly at around 500 RPM if everything is okay. Now open up the machine and go to the pickup, if the pickup is on the inner area push it slowly and carefully to the outer zone with power off. Now power on the DVD and observe the pickup and the Lens. For safety precaution don’t look at the lens directly with your eyes, just look at an angle from a distance. If the pickup moves to the inner area smoothly and after reaching the inner lane the lens start moving up and down emitting red light then most probably the lens is okay. If the disc is spinning slowly expect the spindle motor is probably shorted or the power supply to the spindle motor has some problem To test the spindle motor with a DMM, set your meter to low resistance test (200 ohm) range, if it is okay should read between 5 and 20 ohms. On analogue meter, this is my favorite set the meter to X1 and measure across
this Article Home » Categories » Computers and Electronics » Maintenance and Repair ArticleEditDiscuss Edit ArticleHow to Repair a CD With Toothpaste Two Parts:Getting StartedPolishing the CD with ToothpasteCommunity Q&A When CDs were released, they were advertised as "indestructible." No one will believe that any more. While you can buy commercial CD repair kits to fix these fragile objects, it turns out there's an easier way. Squeeze that tube of toothpaste and let's get started. Steps Part 1 Getting Started 1 Check both sides for damage. A CD stores information just beneath the label. A scratch that tears through the label usually destroys the CD permanently. Fortunately, scratches are more common on the reflected side, and that's where toothpaste comes in handy. The laser that reads the CD needs to bounce evenly off the smooth, reflective surface.[1] Toothpaste is just abrasive enough to wear down scratched areas to a smoother surface. Small scratches and scuff marks are much easier to repair than deep gouges. Some CD repair services can repair the disc with a special buffing machine, but these are hard to use without causing damage. 2 Wash the CD with a damp, lint-free cloth. Even if you can't see them, tiny flecks of dust on the CD could gouge out new scratches when rubbed with the toothpaste. To prevent this, hold the disc under cool, running water and rub it with a lint-free cloth such as cotton or microfiber. Always rub directly from the center to the edge, never in small, circular motions or along the circular pathways. Only wash the reflective side of the disc. If the CD is very dusty, gently spray it with canned air first. If the CD is visibly greasy, use rubbing alcohol or a CD cleaning solution instead of water. 3 Choose your toothpaste. Only an actual "paste" will work, not a gel.[2] If convenient, choose a "whitening" or "tartar control" toothpaste. These tend to be more abrasive, which will help polish the CD. You might be able to look up your toothpaste brand online to find the "RDA," a measure of abrasiveness.[3] A high RDA toothpaste usually makes a smoother surface, although that's not always true.[4] Part 2 Polishing the CD with Toothpaste 1 Squirt the toothpaste onto a lint-free cloth. As before, a clea