The old version of my 7 years ago around me was like an old friend, and it was like an altar intoxicating aging. It helped me to make great achievements in my career. As light as a swallow, 1KG weight is just as convenient as the iPad is around. The Samsung 128G MLC solid-state drive equipped offsets the disadvantages of the low-voltage processor. Internet access, PS, and PPT are called "determined" - fast. The only fly in the ointment is that at the end of the night, the blind wife does not allow the lights to turn on, and each blind fight is very painful. So I decisively set up a backlit keyboard at Ma Yun's home to explore and replace it. I wish my luck! To disassemble a professional, we must be more careful, but those who are a bit eager to pursue will be equipped with tear-down tool kits and various types of cymbals and cymbals. Those who are pursuing will walk on rivers and lakes with a screwdriver and a credit card and will always leave behind. Some scars are commemorated. 特 Hereby Amway disassemble this kit, do not 198 nor 98, as long as seven 9 yuan (I bought for 14 years 29, oh ...). Today, Ma Yunjia has ranged from 18 to several hundred. Speaking of the backlit keyboard, if it appears in the notebook configuration list, it may bring a difference of a few hundred dollars. When you think about the trend of the Macbook backlit keyboard, it would take 10,000 pieces to chase after the wind. I shook fingers and entered Ma's home, entered the information of the Dell E4200 backlit keyboard, jumped out of the 20 yuan large carriage backlit keyboard and 30 yuan small carriage backlit keyboard, or brand new, at this time my eyes are Wet. What is hot and goes straight to the topic? Regardless of the notebook computer, before opening the keyboard, be sure to open the screen to the maximum angle to prevent it from jamming. Especially for Dell laptops, as far as I know, the old latitude series (such as the 700M I used), the E series (such as my E4200) and even the high-end XPS series (such as the XPS M1210 I have used) are all on the keyboard. A baffle was designed above, so the way they disassemble the keyboard is the same, and all are routine. In general, Dell's upper bezel of the keyboard will have 4-6 buckles, so you need to use a crowbar to move from side to side, do not use brute force, otherwise it will snap off. Here to share a little trick, start from the direction of the power button 撬 撬 撬 撬 撬 撬 撬 撬 撬 撬 撬 撬 撬 撬 撬 撬 撬 撬 撬 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。. ↑ This is how you remove the bezel. Since the E4200 is a touch button, all the sensor modules are under the bezel. ↑ Then, I swear by the big breasts to the organization that almost all Dells have left and right each screw, directly, holding a screwdriver. ↑ After unscrewing the screw, the keyboard can be turned over. There is a tiny, insignificant interface on the right side of the keyboard cable interface. In fact, this is the IC interface of the backlit keyboard. Give us a close-up look! In fact, such as Dell's ambitions in the notebook industry are too numerous to enumerate, buy a few more than a backlight keyboard, hundreds of times (of course not only more backlit keyboard ...), in fact, many notebooks are reserved for backlight Keyboard interface, we can pay attention to the hands of the old man. Look at the front of the backlight / ordinary keyboard like a sample, flip it to know that their structure is still significantly different, the biggest difference is that the backlit keyboard on the basis of the ordinary keyboard, adding a whole piece of light guide circuit board, due to the design is very Exquisite, and will not increase the thickness, so the old machine does not change the feel after changing the backlit keyboard. Of course, the backlit keyboard has an extra small circuit board with four chips embedded in it. The following is more convenient to install a Bluetooth card In that year, the Dell E4200 was a 1W2 high-end business notebook. In addition to the 1KG weight and the 128G MLC SSD, it also had various interfaces built in, making it possible to upgrade the low-end machines. For example, this DELL 365 Bluetooth module, Ma Yun Jia can buy 20 yuan disassemble goods, anyway, this stuff does not matter. ↑ Well, although the Bluetooth module is not expensive, but the Bluetooth module base bracket is not cheap, Ma Yunjia wants to 80 Ocean, ah, total gross grandfather let you have a Bluetooth function. Is the value or not worth? I can't say... ↑ The E4200 Bluetooth module is located on the right side of the keyboard. It is really easy to install and the cable is plug-and-play. ~Duang~~Duang~~Duang~ finally put a Bluetooth E effect on the small E, and then go to Ma Yun's home to the manure (he used a DELL WM524 Bluetooth mouse, 63 ocean package U)... Finally; give everyone a look at the parts under the keyboard, because; take a deep breath, close your eyes... what a mess... Finally, it's time to close! ! ! 相信 Believe me, the E4200 keyboard for backlighting is easier than taking the express service downstairs. It's easy to get acquainted with a pressure, leaving no sequelae. SOS: Please be certain that surely the keyboard keys and backlight cables are tightly inserted. ↑ See the flowers in the fog, it's all fog, I'm in the sky, hit the plane... 扒 扒 扒 扒 扒 扒 扒 扒 扒 扒 扒 扒 扒 扒 扒 扒 扒 扒 扒 扒 扒 扒 扒 扒 扒 扒 扒 扒 扒 扒 扒 扒 扒 扒 扒 扒 扒 扒 扒 扒 扒 扒 扒 扒 扒 扒 扒 扒 扒 扒 扒 扒 扒 扒 扒 扒 扒 扒 扒 E E E Perfect system! 确定 When it is determined that the keyboard light is normal, press the button and try to input normally, you can screw on the two screws. The installation of the baffle should also be careful, I once broke the buckle, the front of this baffle has 5 raised buckles, corresponding to the groove of the C case, you need to cover the top, and then find a good angle to press below The buckle, when you find that you can't go down, don't be too brute force. The buckle is easy to scratch. It is suggested that you can shake the lower position and fine tune the position. If you are lucky, you can do it all in one go. Finally attached a picture of a "playing" backlit keyboard. This picture is poisonous. I have stared at it for three minutes. It's so enjoyable. In short, this transformation and upgrading is very smooth. For the old, a very small amount of money can be used to obtain a leap in the performance of a certain function, and the fun of DIY is wonderful, and it can also make young people rejuvenate. ,Why not do it? Everyone moves quickly...
A siren is a loud noise-making device. Civil defense sirens are mounted in fixed locations and used to warn of natural disasters or attacks. Sirens are used on emergency service vehicles such as ambulances, police cars, and fire trucks. There are two general types: pneumatic and electronic.
Many fire sirens (used for calling the volunteer fire fighters) serve double duty as tornado or civil defense sirens, alerting an entire community of impending danger. Most fire
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shaft. Some newer sirens are electronically driven speakers.
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Civil defense sirens also used as fire sirens often can produce an
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alert (steady tone) and attack (fast wavering tone). Fire sirens are
often tested once a day at noon and are also called "noon sirens" or
"noon whistles".
The first emergency vehicles relied on a bell. Then in the 70s,
they switched to a duotone airhorn. Then in the 80s, that was overtaken
by an electronic wail.
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