Macintosh Laptops

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Analysis and maintenance of power adapters for laptop

Analysis of laptop power adapters and maintenance

Visit the source of power - Analysis of AC adapters and laptop adapter laptop maintenance is the source work force, which is a food of high quality switching, Article batteries.co.uk www.supply work principles and color TV and other devices in power Switching is the same, its function is to provide a stable portable low-voltage DC (usually between 12 ~ 19V).

Universal notebook adapter Portable AC power are completely sealed small volume set of dollars, while its energy consumption is usually 35 ~ 90 W, so the internal temperature is high, especially in hot summer days, tap the adapter works in a sensation of heat. Therefore, the failure rate compared with the power adapter from other components of portable computers is still relatively high. adapter damaged after the purchase of a total of new spending several hundred dollars in the used car market may also need a hundred dollars. In fact, a lot of damage and power adapter Nevermind, a little knowledge of the user to understand some of the circuits for repair, this article will be IBM's "flesh" Power Adapter (16V, 4.5A), for example, describes the continuing dismantling and easy for your reference. Power Adapter

remove power adapter the laptop top cover and bottom of the injection or packaged with a strong adhesive, and do not screw it up, so the head can not resort to violence to crack. Acer Aspire 5500 AC adapter, however, provided that the right way, the dismantling of power after the appropriate adapter fully restored to its origin, are not carefully observed almost no open scene. Removal tools: electric knife, hammer, screwdriver, soldering iron, knife, etc..

Step 1: Connect the power adapter is placed in the White Paper horizontal side, Dell Adapter Inspiron 6400 with the knife blade along the power adapter to bridge the gap between the upper and lower eyelid, press with a utility knife hammer power (Figure 1), the adapter electric knife cut between the upper and lower eyelid.

The above method to allocate the space between the bottom cover many different places, then use the knife supply along the gap between the upper and lower eyelids to paddle a few Circle, where the top and bottom of the first to break a lid, put the point in depth, then slowly up and down the top of the adapter separately. This article comes of www.supply-batteries.co.uk Nikon EN-on14 battery

Step 2: Figure 2 shows the power adapter to open the envelope, you can see the adapter board wrapped in a layer of copper to protect the screen with a knife to open the field on the strip of paper, then open electric welding iron shield and the circuit Then the two attached inside, you can delete the shield. Structural analysis of the AC adapter is happening, we can understand the internal structure of the power adapter

.

Features include:

1: varistors, and its function is when the external stress is too high, the pressure sensitive resistance quickly become very small, and minimum pressure fuse in series resistance to protect other circuits will not be burned.

2: Fuse, 2.5A/250V specifications, when the current in the circuit is too large, the fuse will blow to protect the other components.

3: inductance of the coil (also called self) main function is to reduce electromagnetic interference. 4: bridge rectifier, D3SB specifications, Apple PowerBook G3 adapter function is to 220V AC DC.

5: filter capacitor, 180uF/400V specifications, the filter paper in DC AC wave, the circuit more reliable.

6: OP AMP IC (integrated circuit), Paul Le circuit protection, an important component of the voltage regulator.

7: temperature probe used to detect the temperature of internal power adapter, when the temperature exceeds a certain value (of different brands of AC adapter, all temperature threshold slightly different), the protection circuit cutting the adapter output voltage, protecting the card from damage.

8: Power switch, PSU is one of the basic components, the power of the Court "opening and closing of" work credit Switch.

9: Transformers distribution, switching power supply in one of the essential components.

10: The complete secondary injection tube, the function is Low Voltage AC 510 AC Adapter HP low voltage DC current. IBM Adapter, rectifiers is parallel to the work of two high power for maximum current output.

11: subfilter Specification for capacitors 820uF / 25V, two low-voltage DC ripple effect of the filter. In addition to these additional components, not You can adjust the potentiometer circuit boards and other components RC.

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Apple iBook 1999 2000 PowerBook G3 Compatible AC Adapter Power Supply 2C112001 $38.05 Compatible notebook models:Apple iBook (1999 model original)' Apple iBook (2000 model original)' Apple iBook (Blueberry)' Apple iBook (Graphite)' Apple iBook (Indigo)' Apple iBook (Lime Green)' Apple iBook (Tangerine)' Apple PowerBook 1400' Apple PowerBook 1400C' Apple PowerBook 1400CS' Apple PowerBook 2400' Apple PowerBook 2400C' Apple PowerBook 3400' Apple PowerBook G3 1997' Apple PowerBook G3 1998' Apple PowerBook G3 1999' Apple PowerBook G3 Lombard' Apple PowerBook G3 Pismo' Apple PowerBook G3 Wall StreetCompatible part numbers:ADP45LB BM4402 M4895 M4896 M5937 M6384M6384LL/A M6384LLA M6548G/A M7332 M7332LL/AM7332LLA M7387 M7387LL/A M7387LLAInput: AC100V 240VFrequency: 5060HzOutput: 24V1.875A. This item takes between 721 days to ship/arrive because it ships out of Hong Kong or China.

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