【 Weak current College 】 maintains hardware considerations and maintenance methods 】

Now more and more people begin do-it-yourself repair computer hardware, and a variety of articles in a newspaper that is also increasing, but with my many years engaged in electronic product maintenance work experience, the majority of which are "palliative", and some even call in to the hardware, so the "tonic" is the long-term consequences of the disease with the hardware "work until early take a back seat. In order to avoid such things happen, I'm here to say that the majority of computer enthusiasts in the maintenance of the hardware should be aware of some issues that will hopefully give us some help. 　　First, not to easily adjust the hardware adjustable resistor in non-stressed not to use Nail Polish ($ 0.5 sold products) do a tag. Many of my friends in the repair disk drive read failure would expect difficulties in adjusting the power resistor laser diode, but that is not correct, because the laser diode is higher than the rated power will greatly speed up the work of its aging, the lot of you could use a few months, you can only use a few weeks, but its power poll too large or too small are not reading disk performance increase, but can also lead to a disc or reading out of the consequences, not like some of the articles mentioned power better, repairing optical drive read disk difficult correct method is to first look at the lens is not dust, if there is dust or look bad, then gently wipe the absorbent cotton stick available, typically to troubleshooting, but remember that must not use any cleaning liquid (including alcohol), be sure to dry rub, if there is no effective Cawan, you can send the empty tray into place after lens do upper and lower eye when focused action in distance objective lens 20cm-30cm Department direct objective lens (this distance is the safe distance, will not cause damage to the eyes), if you do not see the Red Laser can determine is the wire (higher failure rate) or laser driver circuit or laser tube failure, then you can make the appropriate specific check; if you have the laser emits and strong, proven fault points mostly objective lens settlement or CD hostage for clearance larger or reflex channel dust dirty, if the laser is very weak by bald internal dirty or laser tube aging, in determining the cause of 80% is due to dust dirty when faults will be bald removed, and then in a very clean container (the container can be fully immersed for the bald) into pure water (do not use mineral water or tap water) and drop a drop of dish soap, after placing the bald and standing 4 hours or more, then take out the bald and the new injector pure water rinse several times, finally into the shade back stem (here the dust to minimum), time to 24 hours (it is best not to use the hair dryer to dry), and other dry after loading into the CD drive on a try, if not good, you just change the bald (due to the power of the potentiometer is bad, I have not met once, but you can also try adjusting 1 degree). There is a fix color display image fuzzy failure, many people first think of is to reduce high-pressure package Accelerator and focus voltage, this is very wrong, although not ruined the CRT, but you want to restore the status quo is also very difficult (even if you do Mark also and have some error factory), from then on you tube can only be higher or lower of the voltages for you, just like a "glaucoma" patients for welding work, the correct approach is to first change CRT tube, try, in most cases the fault will be and your monitor's say BYE! if you do not take effect, you can adjust the focus small angle voltage (to use Nail Polish do tags), if no better can be transferred in the opposite direction, if some of the better you can prove your high pressure there's something wrong with the package, you can get a new try, if you transfer it back or exchange high pressure after the package is still does not use it, you can buy a new one with colour display, because the CRT aging can also generate this phenomenon, of course, these hardware maintenance work conducted before you must identify the fault non-software failure, or you'll get a big detour. Note: If the screen is color and fine line (retrace lines), you do not find a high-pressure package, focusing on check the trichromatic circuit, if not find bad pieces you can disconnect the tube holder (in case of power failure) to have your have a gun and filament short circuit, if there is short circuit may be disconnected after filament voltage connected since around the voltage (0.5mm2 wire in high-pressure package around 3-4). Second, note the maintenance environment don't wear fiber cloth clothes for maintenance work, do not place the carpet for maintenance and repair sites best sprinkle water to increase the humidity, which can effectively reduce the generation of static electricity and thus avoid electrostatic breakdown components of human failure. Now that said to static, I would say about how to get static, is very simple, as long as the computer's shell grounding on the list, another case of charged is very common, especially in the old residence, because most of these old houses, no ground wire is a three-phase four-wire (that is, three fire a zero), since many ATX power shell and zero line a capacitor between the add-in, so if you set the zero line and FireWire connected reversely, chassis is live, however its voltage (flow) will not cause injuries, how to determine whether the connected backwards? is very simple, if you use the hand touch shell of metal parts and not electric feel (the minor is electric) proves not received back, or use a voltage measurement, just some of the enclosure would let the pen on it, but I'll be off, then you can conclude that there is no connected backwards, if proved is reversed, you will plug transfer are plugged on the line; there is also a friend said to grounding should be how to add, some newspaper articles are also referred to the grounding method, but do it for building the user is unable to do so anyway, here I will tell you in two ways: first, in zero, FireWire has not received back, go to the hardware store to buy a 10 mm expansion bolts and expansion into the wall, and then set the power outlet hollow ground end up with a more than copper wire 1mm2 received bolt (you can bolt on a nut, then the line in the middle of the two nuts and nut tightening), conditional comrades to the ends of the Earth to prevent oxidation on the Tin; 　　second, in zero, FireWire has not received back to the shell directly received zero line, if you fear not if you can cover insurance-A only than 0 μ F/400 V for electrodeless capacitance received zero line, I strongly recommend using a capacitor to ground method, because the future is likely to have a line of cases, if the construction personnel errors will be zero, FireWire connected backwards so you won't have any dangerous (I have had zero, FireWire is reversed things), this method applies to all the pen into the zero line and pen light users. Note: If you don't understand electrical knowledge, you are looking for an electrical operation permit and have some experience of doing your guidance, otherwise, the result may be that you think not and, I would not accept any responsibility. 　　3. after inspection found a fault element must be calm, do not be too thrilled to put on the new component when the original direction of installation failure, such as capacitors and diode anode and cathode. Remember that I have a friend who is fixing a computer when active speaker will a capacity decrease of power filter capacitor replacement, the positive and negative charge back, leading to the replacement of burst open and capacitance bridge rectifier and amplifier block burned, good in the Horn is not bad, otherwise would be no value. 4. repair hardware to spirit by Jane to difficult to repair, blindly "prescribe" many of my friends believed in some newspapers and see strange fault of hardware is hardware malfunction, if you and your PC is very similar, that is for this reason, not necessarily because of failures in the maintenance of many setbacks are rarely encountered, such as a block on the motherboard or CPU, such as IC, are not easily damaged components, not to the last go for (its production process to determine their failure rate is not high), and the "culprit" is some obscure places, such as dust or bad or thermal or a data cable or even the CMOS Setup problems, etc. 　　I remember a small company's printer because cable internal broken (intermittent even) lead unable to print, the driver cannot be installed as usual, but after pressing the print does not reflect the multi-party heal invalid, find me by a friend, I found this function prints the text of the test itself is not a computer in the text, because the driver is no problem, so I'm determined to cable replacement after everything is normal. So we do not repair broken first thought of the motherboard, CPU internal circuit is broken, and so on failure, or the best way to start though. 5. do not fault enlargement it is essential that this is tell you to do what. If your eyes are not very good, and the number of times one of the used electric iron, but you have to be 100-foot level on the Board of IC from your great soldering iron welded down, the consequence of this Board may be scrapped. In the maintenance process to an audacious, but do not hair hand hair of the feet, because I have had many cases of such things, there are a lot of people in order to make your machine has a good operating environment to reduce the chance of a machine failure, so give the machine to a clean-up, so it appears after the problems of one kind or another, what are the last root Plug and forget to plug in or not seated, the card is not inserted in place or will sweep into the slot, and even worse because of the force is too large to hardware damage to remember a friend I said he's the optical drive cannot read the disc, after my check isfound to have multiple lens on minor scratches, enquiry that is scaring his optical drive for cleaning service using a metal tweezers with cotton wool to wipe the pickup lens, it seems that it is because of his effort is too large or direct contact with the metal tweezers to clean the lens before they cause the lens, because of no lens sold on the market, so a bald so scrap.　　Due to a faulty extension is human failure, so there is no fixed up in the overhaul of the way to increased maintenance more difficult, and some failure of maintenance work was in trouble. If everyone in the repair process will do all the above considerations, so even if you repair the bad or even worse, but manufacturers maintenance staff will save a lot of unnecessary trouble, final beneficiaries or your own. Note: If you mentioned some terms or part name do not quite understand, we recommend that you buy some electronic repair method books or newspapers have been learning about computer hardware maintenance.