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www.hx-technology.com/pcb-assembly-service/pcb-functional...
If you want to ensure the good quality for delivery of every board, the PCB programming, and PCB functional test is the best way to test.
PCBA Online Programming:
Before finishing welding, we usually program the microcontroller in the PCBA board to enable the microcontroller to achieve specific functions. It will improve efficiency and reduce production costs.
PCBA Test
Including ICT test, FCT test, Burn-In Test, fatigue test
ICT Test (In-Circuit Test)： Through the test probe contacting the test point of the PCBA, the main PCBA test circuit continuity, voltage and current value, fluctuation curve, amplitude, noise, etc.
PCB Functional Test Requirements
Before discussing design, test systems, software, and test methods, it is important to understand the "object" - the PCB product to be tested, not only the PCB or final assembly itself, but also how much will be produced, the expected failures, etc., including
Product type
Structure (single PCB / pre-made PCB / final product)
Test specification plan:
test point expected production (per line / per day / per shift, etc.)
Expected failure type
Obviously, the above ignores the "budget", but only after understanding the above items to determine how much a product test to spend, to figure out what is needed to PCB functional test-the UUT before you start discussing funding issues, and only at this time to know how to make compromises to get the job done.
PCB Functional Test Requirements
PCB Functional Test & Programming Quality Control
FCT Test (Functional Test):
Firstly we need to program the prepared single-chip microcomputer (MCU) into the program IC through the burner, this step is conducting a simulation test for all PCBA tests. Then it has any questions from hardware and software, we will also be equipped with the necessary patch processing production tooling and test racks.
Burn-In Test：
After the online PCB programming and FCT for the PCB board, we can simulate user input and output for a long time and periodically test its durability and welding reliability.
Fatigue test：
It is mainly to sample the PCBA board, and perform the high-frequency and long-term operation of the function, observe whether there is a failure, and judge the probability of failure in the PCB board testing, so as to feedback the working performance of the PCBA board in the electronic product.
In order to make sure nothing goes wrong, we will carry out strict inspection procedures to ensure the delivery of high-quality products.
Significance of PCB Functional Test
PCB functional test is becoming increasingly important, however, the same as PCB programming online test, the technology development, and PCB design can make the testing scope limited. Although great progress has been made in the PCB testing software environment to help overcome some of the difficulties, if you want to follow your test strategy to successfully implement PCB functional testing, there are many problems to avoid and to do more thorough preparation. PCB functional testing is increasingly being used in post-production line processes and even for mid-process testing, but the systems and implementation methods are almost completely different from those of the past. Today's PCB functional testing systems are in most cases faster and more compact, and PCB functional testing is indispensable for verifying overall product functionality, maintaining calibration information, providing data to ISO 9000 programs, and assuring the quality of high-risk products. Such as the quality of medical equipment are indispensable.
With an increasing demand for quality PCB designs in the competitive technology market today, PCB Power gives you an ideal choice of design services by experts who, will assist you in all your technological requirements besides fulfilling your demanding schedules
Visit Us Online: www.pcbpower.com
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Not sure what this hardened black substance is. First time I have seen it on a PCB board before. Is this bad??
The internal mains PSU (transformer and rectifier; the smoothing capacitor is on the main PCB) board and its mounting bracket.
www.pcbsky.com/pcb-fabrication/high-tg-pcb.html
What is High Tg PCB
When the temperature rises to a certain area, the substrate will change from "glass state" to "rubber state", and the temperature at this time is called the glass transition temperature (Tg) of the plate. That is, Tg is the highest temperature (°C) at which the substrate remains rigid. That is to say, the ordinary PCB substrate material not only softens, deforms, melts, etc. at high temperatures, but also exhibits a sharp drop in mechanical and electrical properties.
The general Tg of the PCB is 130 degrees or more, the high Tg is generally greater than 170 degrees, and the medium Tg is greater than about 150 degrees.
A PCB board with a typical Tg ≥ 170 ° C is called a high Tg board.
The higher the Tg value, the more resistant the sheet is to deformation and the better its dimensional stability. The substrate material of IPC-4101B (2006) standard epoxy/E type fiberglass cloth is divided into three grades according to the height of Tg (commonly known as low, medium and high Tg). It is an important property in the resin of the sheet. It refers to the gradual change of the physical properties of the resin due to the gradual increase of the temperature. It is converted into a viscous state by the amorphous or partially crystalline hard and brittle nature at room temperature, such as glass. The critical temperature is very high and soft in another state like rubber.
www.hx-technology.com/pcba-security-product/
After every single detail of the electronic device has been finished for the design and engineering, we will prepare for production. The needed electronic components will be purchased from our reliable suppliers globally. First article, small, medium and large serial production are accessible to your security product. HX technology is devoted to providing various high-quality security products, including IP camera circuit board, IP camera PCB board, security PCB, monitor PCB and so on.
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Electronic circuits have always fascinated me, but this photograph interested me because of the myriad of colours. The wires, the capacitors, the resistors, the PCB board, all creating a rainbow of electricity.
IPhone 6 6P NAND Non-Removal Module Adapter For Naviplus Pro3000s
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www.gtpcba.com/industrial-control-pcb.html
Common Uses of PCBs in Industrial Control
Instrumentation
In the instrumentation industry, PCBs can be used as carriers for circuit boards and sensors to provide precise circuitry and control functions for sophisticated test and measurement equipment.
Motor control
In motor control, PCBs can be used to implement control algorithms, real-time feedback and drive circuits to help achieve efficient, reliable and energy-efficient motor control.
Photovoltaic inverters
In photovoltaic inverters, PCBs can be used to achieve efficient energy conversion and maximum power point tracking, helping to achieve optimal performance of solar power systems.
Energy storage systems
In energy storage systems, PCBs can be used to achieve battery management, charge control and energy conversion to help realize efficient and reliable energy storage systems.
New energy charging stations
In new energy charging stations, PCBs can be used to realize functions such as charging control, data transmission and safety protection, helping to realize fast, safe and intelligent charging services.
Mobile charging gun
In mobile charging guns, PCB can be used to realize charging circuits, communication interfaces and safety protection, helping to realize portable, fast and safe charging service.
RFID identification
In RFID identification, PCBs can be used to implement antenna and reader circuitry, signal processing and data transmission to help achieve efficient and accurate RFID identification services.
Advantages of Our PCBs for Industrial Control
Stability
Electronic devices are often required to operate in harsh operating environments. Our products are precision designed and high quality manufactured with excellent stability and reliability, which can adapt to these harsh working environments and ensure long-term stable operation of the equipment.
Versatility
The wide variety of electronic devices requires PCB products of different shapes, sizes and functions to suit different application scenarios. Our products can be customized to meet the needs of a variety of different applications.
High performance
Electronic devices need high-performance PCB products to ensure the accuracy, stability and responsiveness of the equipment. Our products use high-quality materials and advanced production processes to enable high-density, high speed and high-accuracy data transfer.
Cost-effectiveness
The cost and performance of the equipment are two major factors for companies to consider. Our products can be customized according to customer needs with short production cycle while having high quality and cost-effectiveness, which can help companies reduce production costs and improve market competitiveness.
www.speedapcb.com/blank-pcb.html
Blank PCB is a printed circuit board, also called printed wiring board, which is an important electronic component, the support of the electron component, and the supplier of the electrical connection for the electron component. Since it is made with electron printing, it is called a "printed" circuit board.
As the electronic instruments become more and more complicated, the parts they need become much more accordingly, and the circuit and the parts on the board become denser. The blank PCB (without parts on) is often called the "Printed Wiring Board (PWB)". The substrate of the board is made of materials with attribution of insulation, thermal insulation, and inflexibility. The tiny wires can be seen on the surface is the copper foil which had been covered the whole board, but partially etched, then the remaining part formed the tiny netted wires. And these wires are called conductor pattern or electric wiring, which is used for offering the electrical connection for parts on PCB.
Generally, the color of the PCB is green or brown, which is the color of the solder mask. It is the protective layer of insulation to protect the copper foil and preventing the parts from being soldered onto the incorrect positions. Silkscreen will be printed on the solder mask where words and marks (mostly white) will be printed in order to highlight each position of the parts. The silkscreen is also called a legend.
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