The basic knowledge and characteristics of the glaze resistance
2025-12-04
Whether it is a mobile phone, a tablet or other handheld devices, they are basically composed of a mainboard, a display screen, a battery, and a casing. The basic electronic components on the mainboard, such as resistors, capacitors, and inductors, account for almost 80% of the total quantity on the mainboard. As long as you understand these three components, you will have a grasp of 80% of the components on the mainboard of a mobile phone. Now, let's take a look at the basic knowledge and characteristics of the resistors.
Resistor: The resistors in mobile phones are chip resistors. They are the most commonly used electronic components in mobile phones. The surface mount resistors are flat-shaped, with the solder joints at both ends being silver-white and the bottom being white.
Surface mount resistor: It is a combined form of resistors in mobile phones. It is a composite resistor composed of two or more resistors with the same coated resistance value. It is mainly used in the interface circuits of digital circuits, and is commonly used in Nokia mobile phones and mobile phone battery detection circuits of MTK chipsets.
Resistor function: The resistor blocks the current and reduces the current. According to Ohm's Law: I = U/R, the greater the resistance of the coating, the smaller the current.
Series resistance: Two resistors are connected end-to-end. In a series resistance circuit, the current passing through each resistor is the same, but the voltage across each resistor is not the same. The total resistance increases after they are connected in series.
Resistors in parallel: Two or more resistors are connected in parallel. In a parallel circuit, the voltage across each resistor is the same, but the current flowing through each resistor is different. The total resistance of the parallel resistors will decrease.
Mixed resistance: In actual circuits, there are many resistors. Some are connected in series first, then in parallel; some are connected end-to-end. This should also be understood as being connected in parallel first and then in series. This is called mixed resistance.
Resistance characteristics: Energy consumption. It is effective for both AC and DC. It has three main functions in the circuit: current limiting and voltage division;
The unit of resistance: Ohm, Kω (kiloohm), Mω (megohm), Mμ (milliohm)
Special resistance: After the NTC negative temperature coefficient thermistor is specially processed; there is also a kind of glaze resistance that is 0 euros and mainly serves a protective function. Generally, it can be short-circuited when there are actual maintenance problems.
Resistance damage: In general, if there is a break (i.e., the resistance becomes disconnected), or if the resistance value increases, it will directly affect the normal circuit. At the same time, the resistance value of the contact that has been glazed will decrease.
Resistance measurement: When using a multimeter for measurement, select the Ω (ohm) range and start from the highest value and gradually decrease. The black probe is connected to the COM port and the red probe is connected to the V/ω port. When measuring high resistance, wait for several seconds until the reading stabilizes. For more information on resistors related to Qichecheng Electric, please visit our website.
Sichen Electric was founded in 2013. It is dedicated to the production and development of high-power, high-energy-consuming, and small-sized products such as air-cooled modules, water-cooled modules, and absorption resistors. At the same time, it has also expanded into the field of new energy, developing products such as crowbar resistors, loads, grounding resistors, and pre-charge resistors. Currently, these products are widely used by customers in various fields including military, new energy, high voltage, wind power, photovoltaic, and ships. Relying on the rapid development of technology, we have continuously reformed and innovated in the high-power resistor market, breaking away from the traditional and unchanging resistor selection, and providing customers with resistors with cost-effectiveness and technological innovation. Welcome to inquire!
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