16.03.2011., srijeda
Why SONY PCG-5K1L laptop shut off for no reason?
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When notebook SONY VAIO PCG-5K1L is turned on, and automatically power off .with self-test not completed, but power with adapter to the laptop is normal. Why is this so? Phenomenon can be seen from the fault, the problem should be out in the battery or the laptop's battery-powered circuit inside. With the principles of Simple first, first check the battery. Measuring the battery voltage of the two battery packs are 10.5V, with external heating wire method to discharge battery ,and estimate the capacity of the battery pack, two battery packs are relatively abundant. Thus "exclude" the possibility of a faulty battery. Then check the SONY VAIO PCG-5K1L Battery and notebook battery contacts, are also not found any bad problems. Therefore concluded that failure in the notebook's battery-powered circuit inside. Relied on appliance repair skills, and got some tools want laptop apart. But spent nearly half a day, not only does not open, and gave Tim to the two notebook shell scratches. Then I thought, notebook computers are sophisticated electrical, general, its internal circuitry is no problem. Then they come back to check the battery. SONY PCG-5K1L Battery on a total of eight metal interface, are neatly welded to a rectangular piece of circuit board, from left to right the markers were (the battery with the label side up): - - TTII + +. Carefully observed, marked "-" and "+" between the metal pieces are connected with two batteries; two "I"-shaped piece of metal is no connection of any circuit; two "T" shaped metal piece on the connected two golden connection (similar to the enameled wire), has been extended to the bottom of a battery pack. Reveal the battery pack, tear off a layer of adhesive, see the two line elements attached to the size of a grain of rice. When gona to measurements it ,a dry joint found ! After repair welding, machine work as usual! Consulting a local mobile phone repair shop, also learned that this component is part of laptop battery identification circuit for detecting the battery is connected to the laptop (some mobile phone battery has a similar function within the component). In this case, the Weld components inside the VAIO PCG-5K1L Battery lead identification circuit anomalies. Boot, the system on the misconception in mistake that the battery is not connected, and thus power shutdown. |
