7.4.2 Soldering Surface Mount J Lead Components, Continuous Flow Method
This procedure covers the general guidelines for soldering surface mount J lead components.
Place component and check alignment.
Apply solder to the continuous flow solder tip to create a convex bead of molten solder.
Slowly move the tip over the row of leads to form proper solder fillets at each joint.
This procedure covers the general guidelines for soldering surface mount J lead components. There is basically only one style of J lead component. Whether leads are on two sides or four sides, or whether the component is large or small, the soldering principles are the same.
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Minimum Skill Level - Intermediate
Recommended for technicians with skills in basic soldering and component rework, but may be inexperienced in general repair/rework procedures.
Conformance Level - High
This procedure most closely duplicates the physical characteristics of the original, and most probably complies with all the functional, environmental and serviceability factors.
General purpose cleaner for removing contamination.
Precision microscope with stand and lighting for work and inspection.
Properly maintained soldering iron and properly sized soldering iron tips.
Nonabrasive, low-linting wipes for cleanup.
Images and Figures
Surface Mount J Lead ComponentFigure
Figure 1: Place component and check alignment.
Figure 2: Apply solder to the continuous flow solder tip to create a convex bead of molten solder.
Figure 3: Slowly move the tip over the row of leads to form proper solder fillets at each joint.
Figure 4:A - Dot indicates pin 1 B - Indicates pin 5 C - Indicates direction of pin count.
Add liquid flux to the corner pads.
Place the component in position and hold it steady. The leads must be aligned with the pads. On large components this is best done by aligning the leads on opposite corners. (See Figure 1)
Place the soldering iron tip at the junction between the pad and component lead at one of the corners. Apply additional solder as needed.
Remove the tip. Wait a moment for the solder to solidify before soldering the opposite corner.
Apply solder to the continuous flow solder tip to create a convex bead of molten solder on the tip. (See Figure 2)
Position the solder tip so that the solder bead contacts the vertical ortion of the J leads. Slowly move the tip over the row of leads to form proper solder fillets at each joint. (See Figure 3)
Repeat steps 5 and 6 for the remaining sides.
Clean, if required and inspect.
Procedure for reference only.
Customer Comments "We were certain the circuit board we sent to you were beyond repair, but we sent them anyway. They came back, we tested them, and they all functioned perfectly. Job well done!" A.Z. Guadalupe, Mexico