Laptop Accessories, Camcorder Accessories, Digital Camera Accessories
Maintenance notebook power adapter
Motherboard, third largest key components of the screen is only the CPU, and their laptop computers from the power supply. Power system 10 million including power supply, battery and power management system, etc. no power supply is high-tech product what think PSU is actually for notebook Toshiba Satellite L305 Laptop Keyboard computers now is very mature products technology, domestic some southern small workshop, where all can produce relatively perfect quality product. Although the notebook computer power supply, technical content product is low, but the problem is large. The following network adapters, if any are in particular notebook computer power supply no specific instructions. A fault analysisHere is a look at the failure of the IBM 600 E-notebook computer, recently the author found it using external power supply if the notebook computer use the battery no longer booting, also be used.
In accordance with from easy to difficult the principle of the outside, which a multimeter test author found you the AC power cord, namely figure of eight line 1, first with the author after finding a form, the power in open circuit condition. Is the author of the view that touch war strongly apart makes repeated maintenance don’t have too much importance (the most important consideration apart will seriously affect the power cord after the destruction, the overall coordination) keep way notebook computer, looking for alternatives, came across the line and on the radio, it is almost completely General. How to find a normal use of change.But soon the new problem appeared the performance for the notebook computer lost often deep power, performance, and sometimes even a little move that it could lead to a machine, machine from the current debt. The use of the process, often screen Flash, etc. displayed. Two things together in the LCD screen, which is their own fault, on the condition of the author a final supply circuit has a problem, so will look like the author of power supply, usually in the notebook computer supply circuit is not simply issue, supply circuit has a problem, a general problem or out in the power adapter.
Two maintenance process
The author only some small maintenance before the power supply, such as radio and Walkman the AC adapter and no laptop adapter, so can maintenance experience of blind dates, go one step, see step.
Should say a Kung-Fu is open power adapter shell must spend. Notebook computer power adapter shell merger a very fixed, to want to open a draft is almost impossible. Open the housing, bounce back, after it should be said that is not possible. This may be because we identify whether power adapter for original of a standard. Open a plastic caps in Fig.3 already.
(3) The metal screen layer
The metal screen layer role is of course.
(4) Internal view
You can see the power supply internally in the fact change anything important mysterious and ordinary, voltage circuit it have been also some capacity, resistance, inductors, switch and diode power core chip (no figure) is no big difference (Figure 5). Of course, some are high fever element.Which makes notebook computer power adapter in the w or so, send out internal heat production of the most important by the thermal management of plastic housing. The surface temperature of the AC adaptor is quite high, adapter, a standard oven, 80 ° c-estimate is little is not. So, the author suggest that we use in the notebook computer, try you not, something combustible materials accumulate above all on the power supply.
5. Capacity functions
It took note pins, this is the author according to the results of the operation. Prior to the capacity of which already have a small bulge (Figure 6), at high temperatures, electrolytic life is very short, article says, each 10 ° c temperature rise shorten electrolytic life half. As it is, the capacitor use, is not affected but finally it time bomb is in, one day computer burn out supply power circuit on the motherboard of notebook. Thus, the author found a capacity of the change a little bigger. I craft is not too good, and there is no spot welding. So, welding effect is poorer, but absolutely strong.
6. Rectifier circuit (see Figure 9). Coil inductance and capacitance of filter circuit and then joined the transistor circuit switch tube.
7. Adapter wiring diagram
The author of the adapter could not be found, also not schematic, the IBM Thinkpad G41 Laptop Keyboard find original adapter just search the net for Toshiba notebook computer power adapter wiring diagram (as shown in Figure 10). To see, as soon as it was the author Control Board have very similar. In a reference to here.
8. IC chip makes
IC chips in power in the photo above reflect, easily for IC chips too complex, the author even without the chip on the parameters of reason, not to demonstrate. But IC chip is absolute power adapter is the most important in one of the electronic components.
The power supply now has a lot of the components, even components incorrectly, the difficulty of maintenance is more. The power of the network adapter is also a day to make the testing of electronic components to increase more and more large. Indicates if the power supply, the low quality of the electronic components and PCB, cabling are likely to increase improper that chance fault. Below is the author of some experience while performing service, and I hope to help.
1. The power cord at the time as far as possible, avoid attention broke open circuit internal cable form. If external power supply, then can not plug battery, if the machine may try to start the normal, it may be the power cord or adapter. And then with a multimeter it find out whether the power cord, have a problem, maintenance to simplify, not to try open adapter shell start detection to the difficulties of. Open the adapter is the difficulty of the shell is really too big.
(2) If the original adapter has a problem, can not maintenance or repair, late start with other adapter alternative, as long as the output voltage and makes around the can. Laptop computers internal and circuit voltage support, do not worry the stress is too much about the issue of the matching problem.
3. The author once saw a friend on the Internet will appreciate this adapter problems computer motherboard, the burn-out is very rare, if the author notebook computer internal voltage circuit damage have appreciated that.
4. Try not to break the hull shell after the damage can appear problems concerning strengthening of electromagnetic radiation is stable. If the shell trying to repair the damage. Open the appearance, open screen layer, be better had the first test, welding, feet, macroscopic observation can, circuit was on and turn off, and are generally poor contact.
5. Review of the capacity of resistance without any problems, such as capacity, inductance appear bulge, had better in time change, so do not leave hidden problems.