Chapter 2 Basic Maintenance; Introduction; Preventive Maintenance; Inspection - Motorola MCS 2000 Service Instructions Manual

Chapter 2 Basic Maintenance

Introduction

This chapter of the manual describes preventive maintenance, safe handling of CMOS devices, and
repair procedures and techniques. Each of these topics provides information vital to the successful
operation and maintenance of your radio.

Preventive Maintenance

The radios do not require a scheduled preventive maintenance program; however, periodic visual
inspection and cleaning is recommended. After the first year of service, it is advisable to check
Reference Oscillator tuning of the radio.

Inspection

Check that the external surfaces of the radio are clean, and that all external controls and switches
are functional. A detailed inspection of the interior electronic circuitry is not needed or desired.

Cleaning

The following procedures describe the recommended cleaning agents and the methods to be used
when cleaning the external and internal surfaces of the radio. External surfaces include the front
cover, housing and assembly. These surfaces should be cleaned whenever a periodic visual
inspection reveals the presence of smudges, grease, and/or grime. Internal surfaces should be
cleaned only when the radio is disassembled for servicing or repair.
The only recommended agent for cleaning the external radio surfaces is a 0.5% solution of a mild
dishwashing detergent in water. The only factory recommended liquid for cleaning the printed circuit
boards and their components is isopropyl alcohol (70% by volume).
!
C a u t i o n

Plastic Surfaces

The detergent-water solution should be applied sparingly with a stiff, nonmetallic, short-bristled brush
to work all loose dirt away from the radio. A soft, absorbent, lint-free cloth or tissue should be used to
remove the solution and dry the radio. Make sure that no water remains entrapped near the
connectors, cracks, or crevices.

Circuit Boards and Components

Isopropyl alcohol may be applied with a stiff, nonmetallic, short-bristled brush to dislodge embedded
or caked materials located in hard-to-reach areas. The brush stroke should direct the dislodged
material out and away from the inside of the radio.
The effects of certain chemicals and their vapors can have
harmful results on certain plastics. Aerosol sprays, tuner
cleaners, and other chemicals should be avoided.