Operating instructions

Preventive Maintenance 2-3
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 devices in conductive material so that
all exposed leads are shorted together. Do not insert CMOS devices
into conventional plastic “snow” trays used for storage and transpor-
tation of other semiconductor devices.
• Ground the working surface of the service bench to protect the
CMOS device. We recommend using 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 devices.
• Do not insert or remove CMOS devices with power applied. Check
all power supplies used for testing CMOS devices to be certain that
there are no voltage transients present.
• When straightening CMOS pins, provide ground straps for the appa-
ratus used.
• When soldering, use a grounded soldering iron.
• If at all possible, handle CMOS 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 reac-
tion of a discharge to the case would cause the same damage as
touching the leads.
• This radio also contain static sensitive GaAs RF switches. These
devices should be handled with the same precaution as CMOS
devices.
NOTE
Replace with dust cover when the universal connector is not in use.
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C a u t i o n