Disassembly/Reassembly Procedures: Safe Handling of CMOS and LDMOS Devices 5-3
DO NOT attempt to disassemble the radio without first referring to the following CAUTION
statement.
This radio contains static-sensitive devices. Do not open the radio unless you are
properly grounded. Take the following precautions when working on this unit:
• Store and transport all CMOS/LDMOS devices in conductive
material so that all exposed leads are shorted together. Do not insert
CMOS/LDMOS devices into conventional plastic “snow” trays used
for storage and
transportation of other semiconductor devices.
• Ground the working surface of the service bench to protect the
CMOS/LDMOS device. We recommend using the Motorola Static
Protection Assembly (part number 0180386A82), which includes a
wrist strap, two ground cords, a table mat, a floor mat, ESD shoes
and an ESD chair.
• Wear a conductive wrist strap in series with a 100k resistor to
ground. (Replacement wrist straps that connect to the bench top
covering are Motorola part number 4280385A59).
• Do not wear nylon clothing while handling CMOS/LDMOS devices.
• Do not insert or remove CMOS/LDMOS devices with power applied.
Check all power supplies used for testing CMOS/LDMOS devices to
be certain that there are no voltage transients present.
• When straightening CMOS/LDMOS pins, provide ground straps for
the apparatus used.
• When soldering, use a grounded soldering iron.
• If at all possible, handle CMOS/LDMOS devices by the package and
not by the leads. Prior to touching the unit, touch an electrical
ground to remove any static charge that you may have
accumulated. The package and substrate may be electrically
common. If so, the reaction of a discharge to the case would cause
the same damage as touching the leads.
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