SUMMARY

This topic has presented information on miniature and microminiature (2M) repair procedures and 2M safety precautions. The information that follows summarizes the important points of this topic.

CONFORMAL COATINGS are protective materials applied to electronic assemblies to prevent damage caused by corrosion, moisture, and stress.

CONFORMAL COATINGS REMOVAL is accomplished mechanically, chemically, or thermally, depending on the material used.

Component LEADS are terminated either through the board, above the board, or on the board.

SOLDER may be removed by wicking, by a manual vacuum plunger, or by a continuous vacuum solder extractor.

ELECTRONIC ASSEMBLIES should be restored to the original manufacturer's standards using the same orientation and termination method.

A GOOD SOLDER JOINT is bright and shiny with no cracks or pits.

When REPLACING DIPs, TOs, AND FLAT PACKS, make certain that pins are placed in the proper position.

COMPONENT LEADS may be clipped prior to removal only if the part is known to be bad or if normal removal will result in board damage.

The technician must determine through INSPECTION what method of repair is necessary for the board.

ELECTROSTATIC DISCHARGE (ESD) can damage or destroy many types of electronic components including integrated circuits and discrete components.

Special handling is required for ELECTROSTATIC-DISCHARGE-SENSITIVE (ESDS) devices or components.

USE PRESCRIBED SAFETY PRECAUTIONS when you use power tools, soldering irons, cleaningsolvents, and aerosol dispensers.