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Analysis and maintenance of portable power adapters
Analysis of power adapters and laptop maintenance
Visit the source of power - Analysis of mobile power adapters and maintenance of the laptop adapter is the source of the work force, which is a high quality switching power supply, Article batteries.co.uk www.supply-work principles and television and other devices in switching Power is the same, its function is to provide a stable portable low voltage DC (usually between 12 ~ 19V).
Universal AC power adapter for notebook computers are fully sealed portable small amount expressed in dollars, while power consumption is generally 35 to 90W, so the internal temperature is high, especially in the summer day, press the power adapter works in a sensation of heat. Thus, the failure rate adapter compared to other components of portable computers is still relatively high. damaged power adapter after buying a total new spending several hundred dollars, the markets for used cars perhaps hundreds of dollars. In fact, a lot of damage adapter is not serious, a little knowledge of the user to understand some circuits can attempt to repair, this article will be IBM's "bones of the flesh" Power Adapter (16V, 4.5A), for example, describes the maintenance and removal easy for your reference. Adapter
Remove the AC adapter portable coverage top and bottom of the injection or packaged with a strong adhesive, and without the screw, so generally can not use violence to crack. Acer Aspire AC Adapter 5500, however, provided the right path, the dismantling of power after the corresponding adapter completely restored to its original state, there was almost not carefully open up. Removal tools: electric knife, hammer, screwdriver, soldering iron, knife, etc..
Step 1: Connect adapter is placed on the horizontal side of white paper, Dell AC Adapter Inspiron 6400 with the knife blade along the electrical power adapter to bridge the gap between the upper eyelids and bottom, and then contacted with a hammer electric knife worksheet (Figure 1), an electric knife to cut the adapter between the two eyes upper and lower.
The previous method on the map of the gap between the bottom cover different locations, then use the tip the electric knife along the distance between the upper and lower eyelids of a nursery near where the top and bottom of the first crack a lid, place the tip of depth, then slowly up and down the deck adapter separately. This article comes from www.supply-batteries.co.uk Nikon Battery EN-on14
Step 2: Figure 2 shows the current map to open the shell, you can see the adapter card wrapped in a layer saver Copper screen with a box cutter to open the screen on a strip of paper, then open electric soldering iron shield and the internal circuit, then two joints, you can delete the shield. Structural analysis of the DC power adapter, we understand the inner structure of the adapter sector
Functions are:
1: varistors, and its function is when the external stress is too high, the pressure sensitive resistance quickly become very small, and the minimum pressure was the fuse of the series resistance to protect other circuits will not be burned.
2: Fuse specifications 2.5A/250V, when the current in the circuit is too large, the fuse will blow to protect the other components.
3: Inductance coil (also called self) main function is to reduce electromagnetic interference. 4: bridge rectifier, specifications for D3SB, Apple PowerBook G3 paper map is 220 volts AC current.
5: filter capacitor specifications for 180uF/400V, the role of alternating current wave filter, the circuit more reliable.
6: OP AMP IC (integrated circuit), protection of Pablo, an important regulator of blood.
7: The sensor temperature to detect the temperature of the internal power adapter, when the temperature is above a certain value (Different Marks adapter, all slightly different temperature threshold), the protection circuit reduces the output voltage of the adapter, Protection and damage the adapter.
8: power switch, switch power source is one of the basic components, SMPS "blink" credit for work Switch.
9: switching transformers, switching power supply in one major components.
10: set of secondary flux tube, the function is the low-voltage AC adapter, HP 510 low-voltage ac DC. IBM power adapter, rectifiers is parallel to the work of two high power for maximum output current.
filter specifications are: 11 condenser 820uF/25V, there are two, low-voltage ripple effect current filter. In addition to these components can not adjust circuit boards potentiometer and other RC components.
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Laptop watchs, laptop batteries research. digital camera and camcorder watchs.
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From these pictures, what Canadian landform are they?
1. http://adsoftheworld.com/files/nikon_camera_1_ad.jpg
2. http://admonkey.files.wordpress.com/2008/09/ad_086.jpg
3. http://mynextshoes.files.wordpress.com/2009/09/hermes_fall_winter-2010-ad-campaign1.jpg?w=468&h=298
The Canadian landform regions are: Interior Plains, Great Lakes-St.Lawrence Lowlands, Hudson Bay - Arctic Lowlands, Appalachians, Western Cordillera, Innuitian Mountains and the Canadian Shield.
Thank you !
You can thank me all you like but I am not here to do your research, now go away nicely and seek out a dictionary to resolve which words pertain to which area of geography.
