China PCBA factory SMT repair process

In the SMT processing of PCBA factory, there may be some defects or undesirable phenomena occasionally. For defective PCBA products, China PCBA factory will select and repair them. The following is about the SMT patch processing and repair process of China PCBA factory.

1. China PCBA factory SMT welding and disassembly

1. 1）. PCBA factory staff will remove the PCBA coating layer before removing the residue on the work surface.

2. 2）. Install a hot clamp iron tip with appropriate shape and size in the hot clamp tool.

3. 3）. PCBA factory will set the temperature of the soldering iron head at about 300℃, which can be changed according to the need.

4. 4）. The PCBA factory will apply flux to the two solder joints of the chip element.

5. 5）. Remove oxides and residue from the tip of the soldering iron with a damp sponge.

6. 6）. The PCBA factory will place the soldering tip above the SMT patch element and clamp both ends of the element to contact the solder joint.

7. 7）. Lift the element when the solder joints at both ends are completely melted.

8. 8）. The PCBA factory will place the removed components in a heat-resistant container.

2. China PCBA factory SMT pad cleaning

1. 1）. PCBA factory SMT staff will choose a chisel-shaped iron head. The temperature is set at about 300℃, according to the need to make appropriate changes.

2. 2）. A PCBA factory employee brushes flux on the pads of circuit boards.

3. 3）. PCBA factory employees use a damp sponge to remove oxides and residues from soldering irons.

4. 4）. PCBA factory employees place soft, vulnerable, tin-absorbing braided tape on pads.

5. 5）. PCBA factory employees will gently press the soldering iron tip onto the tin absorbing braid. When the solder on the pad melts, they will slowly move the soldering iron tip and braid to remove the residual solder on the pad.
   

3. China PCBA factory SMT assembly and welding

1. 1）. PCBA factory staff choose the right shape and size of the iron head.

2. 2）. PCBA factory staff set the temperature of the soldering iron head at about 280 ℃, and make appropriate changes according to needs.

3. 3）. A PCBA factory employee brushes flux on two pads of a circuit board.

4. 4）. A PCBA factory employee uses a soldering iron to apply the right amount of solder to a pad.

5. 5）. PCBA factory staff clamp the SMT patch element with inserts and attach one end of the element to the tinned pad with an electric iron to secure the element.

6. 6）. PCBA factory employees solder the other end of the component to the pad with an electric iron and soldering wire.

7. 7）. PCBA factory staff soldier the two ends of the components to the pad.
   
   

China PCBA factory basic quality

When choosing a China PCBA factory, it is unreasonable to judge the capability of a PCBA factory only from the size of the factory. Then how should the customer choose PCBA factory? The following lists the basic qualities that an excellent China PCBA factory should have.

1. 1. Check whether the environmental impact assessment of PCBA factory is qualified

2. 2. Check the PCBA factory quality management system certificate

3. 3. Check the raw material channel certificate of PCBA factory

4. 4. Check the incoming inspection of PCBA factory IQC

5. 5. Check raw material storage

6. 6. Electrostatic protection

7. 7, see independent three anti paint treatments

8. 8. See the engineering skills of PCBA factory

9. 9. Look at the on-site management level of PCBA factory

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