Circuit Board Repair and Rework Guide > 7.0 Soldering Procedures > 7.4.1 Soldering Surface Mount J Lead Components, Point To Point Method Bookmark and Share

7.4.1 Soldering Surface Mount J Lead Components, Point To Point Method

Printed Board Type: R/F/C  |  Skill Level: Intermediate  |  Conformance Level: High  |  Rev.: D  |  Rev. Date: Jul 7, 2000

Outline
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.

Acceptability References
IPC-A-610 12.0 Surface Mount Assemblies
  Surface Mount J Lead Component
Surface Mount J Lead Component
Procedure References
CTC 1.0 Foreword
CTC 2.1 Handling Electronic Assemblies
CTC 2.2.1 Cleaning, Local
CTC 2.2.2 Cleaning, Aqueous Batch Process
CTC 2.5 Baking and Preheating
CTC 7.1.1 Soldering Basics
CTC 7.1.2 Preparation For Soldering And Component Removal
CTC 7.1.3 Solder Joint Acceptability Criteria
IPC7711 5.6.2 Point-To-Point Method

Tools and Materials
Cleaner
Flux
Microscope
Solder
Soldering Iron with Tips
Wipes

Procedure

Place component and check alignment.

Figure 1: Place component and
check alignment.


1.   Add liquid flux to the corner pads.
 
2.
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 soldering iron tip at junction between pad and component lead.

Figure 2: Place the soldering iron tip
at the junction between the pad and component lead.


A - Dot indicates pin 1, B - Indicates pin 5, C - Indicates direction of pin count.
Figure 3:
A - Dot indicates pin 1.
B - Indicates pin 5.
C - Indicates direction of pin count.
3.  
Place the soldering iron tip at the junction between the pad and component lead at one of the corners. Apply additional solder as needed. (See Figure 2).
   
4.
Remove the tip. Wait a moment for the solder to solidify before soldering the opposite corner.
   
5. After the opposite corner is soldered, solder the remaining leads.
   
6. Clean, if required and inspect.



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7.4.1 Soldering Surface Mount J Lead Components, Point To Point Method