Repair Procedures And Techniques - General - Motorola EP350 Basic Service Manual

Maintenance – EP350 (Limited Keypad Model): Repair Procedures and Techniques – General
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 transportation 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 apparatus 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 reaction of a discharge to the case would cause the same damage as touching
the leads.
7.4 Repair Procedures and Techniques – General
Note Environmentally Preferred Products (EPP) (refer to the marking on the printed circuit
boards - examples shown below) were developed and assembled using environmentally
preferred components and solder assembly techniques that meet or exceed compliance
to the European Union's ROHS and WEEE directives (Waste Electrical and Electronic
Equipment (WEEE) Directive 2002/96/EC and Restriction of Hazardous Substances
(ROHS) Directive 2002/95/EC). To maintain product compliance and reliability, use only
the Motorola specified parts in this manual.
For the identification of lead (Pb) free assemblies, all EPP products will carry the EPP
Marking, shown below, on the printed circuit board (PCB). This marking provides
information to those performing assembly, servicing and recycling operation on this
product, adhering to the JEDEC standard #97. The EPP Marking takes the form of a
label or marking on the PCB.
Any rework or repair on Environmentally Preferred Products must be done using the appropriate
lead-free solder wire and solder paste as stated in the following tables:
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