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1. Making high-quality PCB printed circuit board products
In the circuit board proofing production process, there are many problems that are often encountered, such as short circuit, open circuit, peeling of pads, poor soldering, etc. Therefore, engineers prefer to choose those with high production quality and high speed when selecting circuit board proofing factories. Fast manufacturers can save a lot of unnecessary trouble, so how to judge that the boards produced by the circuit board proofing factory are high-quality circuit board products? 1. Production process capability: Every process in the PCB production process must be followed Strict production processes are used to implement production, and each process must be equipped with corresponding testing and laboratory equipment to ensure the stability of the circuit board quality. If the production process capacity is not sufficient, the quality of the final circuit board can also be imagined. 2. Selection of raw materials: Choosing cheap and inferior raw materials is actually a risk for circuit board manufacturers. It may win the preference of customers and may cause huge losses to customers, but their quality is generally not good enough. Some circuit board proofing factories such as Jinhong Electronics will use high-quality raw materials, which greatly guarantees the production quality of circuit boards from the source and eliminates future troubles.
3. Production equipment: Choosing cheap and inferior raw materials is actually a risk for the circuit board manufacturer. It may win the preference of customers and may cause huge losses to customers, but its quality is generally not good enough and formal. Some circuit board proofing factories such as Jinhong Electronics will use high-quality raw materials to ensure the production quality of circuit boards from the root and eliminate future problems.
4. Production efficiency: "The world of martial arts is fast and not broken". Production efficiency is also the focus. Only in front of competitors is it always invincible. In the circuit board proofing production process, it adopts advanced management system, Jinhong Electronics real-time Present the order production status and related data, so as to quickly control the quality and progress of each link, and continuously improve the delivery speed. The advantages of each circuit board proofing factory are different. Sometimes users need to make further matching and selection according to their actual needs. In short, users can judge from the production process capacity, production equipment, and raw material selection. Whether the production quality of the circuit board proofing factory is high or low. At the same time, in the current increasingly fierce market competition, users should not blindly pursue low-cost costs to avoid irreparable losses.
Second, 8 common senses to know about automotive circuit board proofing
In the process of automotive circuit board proofing, how many issues do you need to pay attention to? This chapter makes a detailed analysis of the basic common sense of automotive circuit board proofing. Then in the process of automotive circuit board proofing, these 8 aspects need special attention: 1, Pay attention to the insulation performance of the electric soldering iron: it is not allowed to use the soldering iron when it is live. Make sure that the soldering iron is not live. It is best to ground the shell of the soldering iron. Be more careful with the MOS circuit. It is safer to use a low voltage circuit iron of 6~8V. 2. Understand the working principle of integrated circuits and related circuits: Before inspecting and repairing integrated circuits, you must first be familiar with the functions of the integrated circuits used, internal circuits, main electrical parameters, the role of each pin, and the normal voltage, waveform and periphery of the pins. The working principle of the circuit composed of components. If the above conditions are met, analysis and inspection will be much easier.3. The internal resistance of the test instrument should be large: When measuring the DC voltage of the integrated circuit pins, a multimeter with the internal resistance of the meter head greater than 20KΩ/V should be used, otherwise there will be a large measurement error for the voltage of some pins.4. Pay attention to the heat dissipation of the power integrated circuit: the power integrated circuit should have good heat dissipation, and it is not allowed to work in a high-power state without a heat sink.
5. Guarantee welding quality: When welding, the welding is firm, and the accumulation of solder and pores are easy to cause false welding. The soldering time is generally no more than 3 seconds, and the power of the soldering iron should be about 25W with internal heating. The integrated circuit that has been soldered should be carefully checked. It is best to use an ohmmeter to measure whether there is a short circuit between the pins, confirm that there is no solder adhesion, and then turn on the power. 6. Leads should be reasonable: If you need to add external components to replace the damaged parts of the integrated circuit, small components should be selected, and the wiring should be reasonable to avoid unnecessary parasitic coupling, especially the audio power amplifier integrated circuit and preamplifier should be handled well. Ground terminal between circuits. 7. Do not judge the damage of the integrated circuit easily: Do not judge that the integrated circuit is damaged easily, because most of the integrated circuits are directly coupled. Once a certain circuit is abnormal, it may cause multiple voltage changes, and these changes may not be It is caused by damage to the integrated circuit. In addition, when the voltage of each pin is measured to match or close to the normal value in some cases, it may not always indicate that the integrated circuit is good. Because some soft faults will not cause changes in DC voltage. 8. Do not cause a short circuit between pins: When measuring voltage or using an oscilloscope probe to test the waveform, do not cause a short circuit between the integrated circuit pins due to sliding of the meter pen or probe. It is best to measure on the peripheral printed circuit directly connected to the pin. Any momentary short circuit can easily damage the integrated circuit. Care must be taken when testing flat-package CMOS integrated circuits.
