When industrial monitors encounter problems, they need to be inspected one by one to solve the problem. Due to the complex structure of industrial monitors, when problems arise, people are unsure about which aspects to address. Today, Geshem Industrial Display Manufacturer will organize the common methods and steps for inspecting industrial monitors.
Measuring current is one of the basic methods for repairing industrial monitors. It is mainly used to measure the load current and operating current of transistors and integrated circuit chips to check if the integrated circuit, transistor, and their power supply loads are normal, and so on. As long as the measured load current of the transistor or integrated circuit is normal, it can be determined that the working status of the circuit is basically normal. On the other hand, if the current changes significantly compared to the normal value, it indicates that there is a problem with the circuit, and targeted inspection can be conducted.
Measuring voltage is also one of the basic methods for repairing monitors, frequently used in practice. It mainly measures the operating voltage of circuits and components to determine the faulty parts and components. Voltage measurement can be divided into two categories: AC voltage measurement and DC voltage measurement. AC voltage measurement uses an AC voltage range of a multimeter to measure the AC voltage value of the monitor's power supply. Of course, a sufficiently large voltage-resistant capacitor of about 0.1μF can also be connected in parallel to the multimeter to measure the AC part of the field scanning output circuit, row scanning output circuit, video amplification circuit, and other parts. By using a multimeter to check the AC voltage and comparing it with the normal value, the normal operation of the circuit can be determined.
15 inch industrial monitor also include measuring resistance as one of the basic methods for repairing monitors. It is mainly divided into two types of measurements: measuring the resistance value to the ground of the monitor circuit and components, and measuring the resistance value of the components themselves. Measuring the resistance value to the ground of the circuit's output end can determine if the circuit's load is normal. For example, when measuring the resistance value to the ground of the regulated power supply output end, if the load resistance changes significantly, the resistance value to the ground of the regulated power supply output end will inevitably have a significant change. This can easily determine the location of the fault. When measuring the resistance value between each pin of a transistor or integrated circuit chip to the ground, it is necessary to measure its forward and reverse resistance. Usually, the resistance value measured with the negative test lead grounded is the forward resistance, while the resistance value measured with the positive test lead grounded is the reverse resistance. Based on the change in the measured resistance value, it is possible to compare it with the normal resistance value and determine the location of the fault. When it is not clear about the specific location of the fault, the transistor or integrated circuit chip can be removed to measure the forward and reverse resistance between each pin of the transistor and the forward and reverse resistance between each pin of the integrated circuit chip and the ground pin. This can roughly determine the condition of the transistor or integrated circuit chip.