Safe Handling Of Cmos Integrated-Circuit Devices - Motorola ASTRO Spectra Instruction Manual

Safe Handling of CMOS Integrated-Circuit Devices

Introduction
This section will aid you in troubleshooting a malfunctioning Consolette. It is intended to be detailed enough to
localize the malfunctioning circuit and isolate the defective component.
C a u t i o n
Handling Precautions
Complementary metal-oxide semiconductor (CMOS) devices and other high-technology devices are used in the
Consolette. While the attributes of these devices are many, their characteristics make them susceptible to damage
by electrostatic discharge (ESD) or high-voltage charges.
Damage can be latent, resulting in failures occurring weeks or months later. Therefore, special precautions must be
taken to prevent device damage during disassembly, troubleshooting, and repair. Handling precautions are
mandatory for this radio and are especially important in low humidity conditions. DO NOT attempt to disassemble
the radio without observing the following handling precautions.
1. Eliminate static generators (plastics, Styrofoam, etc.) in the work area.
2. Remove nylon or double-knit polyester jackets, roll up long sleeves, and remove or tie back loose hanging
neckties.
3. Store and transport all static-sensitive devices in ESD-protective containers.
4. Disconnect all power from the unit before ESD-sensitive components are removed or inserted unless otherwise
noted.
5. Use a static-safeguarded workstation, which can be accomplished through the use of an antistatic kit (Motorola
part number 01-80386A82). This kit includes a wrist strap, two ground cords, a static-control table mat and a
static-control floor mat.
6. Always wear a conductive wrist strap when servicing this equipment. The Motorola part number for a
replacement wrist strap that connects to the table mat is 42-80385A59.
Parts Replacement and Substitution
Special care should be taken to ensure that a suspected component is actually the one at fault. This special care
will eliminate unnecessary unsoldering and removal of parts, which could damage or weaken other components or
the printed circuit board (PCB) itself.
When damaged parts are replaced, identical parts should be used. If the identical replacement component is not
locally available, check the parts list for the proper Motorola part number and order the component from the Radio
Products Services Division.
6881086C22-B
Before using this product, read the operating instructions
!
for safe usage contained in the Product Safety and RF
Exposure booklet enclosed with your radio (Motorola
Publication part number 6881095C99).
Consolette Installation Guidelines
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