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Product description [Shortkiller]-Chip short circuit repair tool operating instructions After connecting to a mobile phone, first observe the current. This instrument can handle the following situations: Power-on short circuit (power the phone with a stabilized power supply, under the premise of setting the standard voltage and connecting the positive and negative poles), while the power supply displays the current and emits an alarm sound!High current exceeding 500 mA when pressing the power button.Low current rapid fluctuation.Able to clearly identify that there is a short circuit at a certain point in the circuit, but unable to find the exact short-circuited component. Precautions for using a multimeter for measurement: When using a multimeter to measure the mobile phone motherboard, if the battery contacts are directly short-circuited, the multimeter will beep. At this time, pay attention to whether the actual resistance value is 0. You can set the voltage to 1V and, according to the battery markings, clamp the instrument's test leads onto the negative terminal of the battery on the motherboard or directly onto the shielding cover. Then, touch the positive probe of the instrument to the positive terminal or contact point of the battery on the motherboard. When the device beeps, it indicates that there is an electrical shock. If it beeps continuously for five times, the connection to the device should be disconnected. Measure the resistance value of the battery contacts again. If the resistance value has increased, you can try increasing the voltage of the test.If the battery contacts do not directly short-circuit when measured with a multimeter, measurements should be performed around the power IC to find the short-circuited component, mainly the large capacitors (which can be quickly located). Then, proceed with the electrical shock using the same method as mentioned above. How to determine the positive and negative terminals of a capacitor: Start by clamping the black clip of the multimeter onto the motherboard shielding cover. Then, using a voltage of 1V, touch the positive probe onto each terminal of the capacitor separately. When the buzzer beeps, take note of the voltage value. Record the voltage values for both ends of the capacitor, and the end with the higher voltage value is the positive terminal of the capacitor. Precautions: If the short circuit cannot be penetrated even after multiple attempts, check for any intentional short circuits caused by human factors, such as a dented shielding cover, deliberately set shorts, or damage to the edges of the motherboard, among others.If the short circuit cannot be penetrated after multiple attempts, you can use the method of smoking with rosin to assist in the troubleshooting process. Remove the heating component and then test for short circuit conditions. Power-on testing for short circuits Quick and accurate fault location, with automatic burnout of the fault point. Real-time display of current and voltage Used for short circuit fault detection in various mobile phones and computers. Short circuit and burn detection for mobile phone motherboards A new PCB short circuit detection tool for mobile phone motherboard repairs, which helps technicians accurately and quickly assess current interruptions in the motherboard. See More
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