SMD LED Bulb Repair Machine

DH-A2 SMD LED Bulb Repair Machine is suitable for repairing, soldering, desoldering LED BGA IC chips on motherboard without any damage to motherboard and chip due to strict temperature control.

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Description

1.Application Of Automatic SMD LED Bulb Repair Machine

Solder, reball, desoldering different kind of chips: BGA,PGA,POP,BQFP,QFN,SOT223,PLCC,TQFP,TDFN,TSOP,

PBGA,CPGA,LED chip.

2.Advantage of Hot Air Automatic SMD LED Repair Machine

3.Technical data of laser positioning Automatic SMD LED Bulb Repair Machine

4.Structures of Infrared CCD Camera Automatic SMD LED Bulb Repair Machine

5.Why Hot air reflow Automatic SMD LED Bulb Repair Machine is your best choice?

6.Certificate of Optical Alignment Automatic SMD LED Bulb Repair Machine

UL, E-MARK, CCC, FCC, CE ROHS certificates. Meanwhile, to improve and perfect the quality system,

Dinghua has passed ISO, GMP, FCCA, C-TPAT on-site audit certification.

pace bga rework station

7.Packing & Shipment of CCD Camera Automatic SMD LED Bulb Repair Machine

8.Shipment for Split Vision Automatic SMD LED Bulb Repair Machine

DHL/TNT/FEDEX. If you want other shipping term, please tell us. We will support you.

9.Contact us for Automatic SMD LED Bulb Repair Machine

Email:john@dh-kc.com

MOB/WhatsApp/Wechat: +86 15768114827

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11. Related Knowledge of Automatic SMD LED Bulb Repair Machine

How to Reduce Noise on the Board

Many circuit board designers often do a perfect job in circuit design, but during debugging, there are always various unbearable noises. Upon close inspection, the source of the problem is unclear, leaving no choice but to redesign the board. Faced with board noise, Lianxinghua has analyzed the following methods to reduce it.

In general, the circuit should be partitioned by modules, with a clear quiet zone between partitions to minimize the impact of the power supply and ground on the signal, thereby reducing circuit board noise. The specific methods will be analyzed and solved together below.

For a high-performance board, the general layout is clear at first glance (assuming one understands the function of the board). This is what we often refer to as the principle of functional module separation. A functional module is a collection of circuits where electronic components are combined to perform a specific function. In actual design, we need to place these components close together, shortening the wiring between them to enhance the functionality of the module. This concept is easy to understand, and we commonly see it in development boards or mobile phones, especially in phones. If you disassemble a phone, you'll notice the obvious separation between modules, and each module is shielded by a Faraday cage.

Second, when both analog and digital circuits exist on a PCB, they need to be separated. A quiet zone should be established, which physically separates the analog and digital circuits or other functional modules. This prevents interference between different modules. In the mobile phone circuit board mentioned earlier, the quiet zone is clear. It's important to note that the quiet zone is not connected to the board's ground.

In practical circuit design, not all PCB boards have enough space for a quiet zone. So, when space is limited, how should it be designed? I've summarized the following solutions:

A. Use a transformer or signal isolation component. This means separating circuits, a common approach with components like CMOS or transistors.

B. Pass the signal through a filter circuit before it enters the module. This is a common method for preventing ESD (Electrostatic Discharge), and it can also help eliminate noise (such as ESD, high-frequency, and high-voltage noise).

C. Use a common mode inductor for signal protection. Although some may question the value of this component, especially when only two coils appear on the schematic, the common mode inductor plays a critical role in stabilizing the signal and reducing noise interference.

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