This is not the first time ever on Nokia products lately. Previous Nokia 5800 has a serious disturbance in the speakers that are included in the category of defect production, as well as on the Nokia N76 and some other products. Today, we again received this news, which this time happened to their flagship product this year, Nokia N8, and thereafter the device, the Nokia C7. This phone can be said to have a defect in principle, that by Nokia, because it is still trying to save his reputation, refused to acknowledge. This is almost the same as the iPhone antenna case 4 first, but more severe because it can cause the total dead cell phone.
Through a quick search on the Web there are more than one hundred thousand citations in the entire world. This number certainly does not reflect the number of damaged units, but it is a reliable indication of the problems that have been known and widely discussed throughout the world. Here I want to remind you that the sales began on September 30, and gained momentum in early October. Below you can find links to several threads on Nokia's official website:
One thing that seems real about the Nokia N8 all deaths so far is the phone will not boot. The phone is only turned into a lifeless brick. Every now and then spontaneously reboots also been reported so far. Most reports come from Asia instead of Europe. Looks like any unit, regardless of when and where it is purchased, can be affected.
A quick survey of the service center and distributor chain showed that about 400 and 800 units of Nokia N8 have been received for repairs, each in October and November. In October 2010, the ratio of defects is estimated about 5 percent and will increase to more than double by the end of this month. So, how big is the problem?
Almost all service centers face abnormally high failure rate for new models of service, something that has proven to signify a congenital defect (eg problems with assembly, component or design problem). Although this flaw does not reveal all the events at once and everything is possible depending on usage scenarios, but the fact the number of damaged units continued to increase over time. A defective unit can survive for several years before it is damaged or die within days if used intensively. It is a gamble for the user. And even if the previous scenario was correct, it does not mean that the phone had not been flawed from the beginning. Habits of the use of a person may have a great impact on whether the defect will soon appear or not. And a very painful, of course, is if it turns out the effect of this defect appeared after the warranty period runs out.
Usually, the phone will be back in the first month because the owner did not like it in general or disappointed with certain features, but not because the phone does not work. For example, when Apple's iPhone four complaints because of the antenna, cell phone can still be used normally when we meet certain procedures, or purchase any additional accessories. And this problem is a total dead cell phone, you can use it?
What model of Nokia N8 and C7 have in common? First glance tells us that the Symbian ^ 3 is the main feature. Does the OS can make a product can "die"? Theoretically possible, but you can not prove it in real life because all Symbian smartphones ^ 3 should suffer the same problem only really proven. We can not throw away this fact, but can not make this as the most important fact because of recent changes in Symbian ^ 3 is not so dramatic.
Another common factor is a board where all components are located. A small board that has many layers and Nokia (or perhaps also the manufacturer in China) reject the use of compound (a type of resin to cover the perimeter of the board to accept the vibration resistance and better connections between layers). This decision was to save costs and the temporary use of the compound takes a few seconds on the conveyor and will increase costs and make the conveyor become less productive. The disadvantage is clear that the physical endurance of the board will decline.
Some people believe that the problem is caused by the installation of additional software, which leads to a reboot. This connection really exists, but has nothing to do with the quality of applications and somewhat determined by the nature of the real problem. Smaller boards have a less effective heat removal and heating of the processor and other components leading to a reboot for emergency situations. This is one reason for this problem. Some users have managed to turn the phone back after putting it in the fridge. You will not be able to resolve the problem at all in this way, but we get feedback from this process. The processor is not the main cause, because it can be turned off when too hot. This is caused by the construction of hardware itself and the mode of exploitation (additional applications, videos that do not convert, etc.).
Rebooting because it is too hot will not destroy the phone. When the processor temperature has dropped, it will be ready to operate again soon. Unfortunately, it did not happen and the handset then become useless.
Flash EEPROM memory is to blame. This memory is used to store data and all models have the disabilities that have been damaged EEPROM, some units that have incorrect information recorded there. This can happen when power has been damaged due to overheating, but it is not realistic because the time period is too short. It is more likely that one of the contacts on the board have been lost and false information recorded is not what is on the way through the bus. Losing a contact and all information has been transferred does not turn it into garbage. Why contacts can be lost?
We should mention that the same with other manufacturers, Nokia has moved into the green without the use of lead solder. Soldering machine is now operating at limited temperature range. Sometimes soldering looked good, but some elements are not supposed to be placed in position on the board. Usually, it does not matter if the board pretty hard and not many layers. Nokia N8/C7 have a multi-layered board without the compound and during heating (the processor heat up higher on the previous model), the board can be distorted. This distortion is minimal, but sufficient to remove a contact on the bus heading to the EEPROM.
There are more complaints in Asia where higher temperatures and this is a proof to confirm our hypothesis. We certainly can argue that problems associated with temperature. You can claim that certain components failed to work due to a higher temperature level, but we did not find facts to support this idea although we have to prove it.
No comments:
Post a Comment