8.2.2 Component Removal, Surface Mount Chip Components, Hot Tweezer Method

This procedure covers one commonly used method for removing surface mount chip components.

Note: The goal when removing any component is to remove the component as quickly as possible.

Caution - Glued Components: A small dot of epoxy is often used to hold chip components in position during wave soldering processing. Typically these components will be located on the bottom side of a circuit board that has through-hole components located on the other side. Whenever you see a board like this, you can generally assume that the chip components will be glued onto the board. You'll need to leave the tip on the component for one or two additional seconds in order to transfer enough heat to over-cure or soften the adhesive. If required, take a wooden stick or curved tweezers and push the component sideways until the glue joint finally gives way.

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. Acceptability References IPC-A-610 12.0 Surface Mount Assemblies

Procedure References 1.0 Foreword 2.1 Handling Electronic Assemblies 2.2 Cleaning 2.5 Baking And Preheating 7.1.1 Soldering Basics 7.1.2 Preparation For Soldering And Component Removal 7.1.3 Solder Joint Acceptability Criteria IPC7711 3.3.2 Tweezer Method

Tools, Materials and Supplies Flex-Rack PCB Holder Sturdy rack for PCBs used for rework and positioning. Cleaner General purpose cleaner for removing contamination. Microscope Precision microscope with stand and lighting for work and inspection. Precision Tool Set Nine precision-crafted tools for detailed circuit board work. Soldering Iron Properly maintained soldering iron and properly sized soldering iron tips. Wipes Nonabrasive, low-linting wipes for cleanup.