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 mate-
rial 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, and a floor mat.
• 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 accumu-
lated. The package and substrate may be electrically common. If so,
the reaction of a discharge to the case would cause the same dam-
age as touching the leads.
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