Maintenance; Introduction; Preventive Maintenance; Inspection - Motorola GTX 2000 Service Manual

Introduction

This section 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

GTX/GTX LTR and LTS 2000 radios do not require a
scheduled preventive maintenance program; however,
p e r i o d i c v i s u a l i n s p e c t i o n a n d c l e a n i n g i s
recommended.

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 neither needed nor 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
assembly, and battery case. 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, such as JOY
recommended liquid for cleaning the printed circuit
boards and their components is isopropyl alcohol (70%
by volume).
June 1999
©
, in water. The only factory
The effects of certain chemicals and
their vapors have harmful results on
certain plastics. Aerosol sprays, tuner
cleaners, and other chemicals should be
avoided.
Cleaning External Plastic Surfaces
The detergent-water solution should be applied
sparingly with a stiff, non-metallic, short-bristled
brush to work all loose dirt away from the radio. A
soft, absorbent, lintless 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.
Cleaning Internal Circuit Boards and Components
Isopropyl alcohol may be applied with a stiff, non-
metallic, 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.
Alcohol is a high-wetting liquid and can carry
contamination into unwanted places if an excessive
quantity is used. Make sure that controls or tunable
components are not soaked with the liquid. Do not use
high-pressure air to hasten the drying process, since
this could cause the liquid to puddle and collect in
unwanted places.
Upon completion of the cleaning process, use a soft,
absorbent, lintless cloth to dry the area. Do not brush
or apply any isopropyl alcohol to the frame, front
cover, or back cover.
Always use a fresh supply of alcohol and
a clean container to prevent contamina-
tion by dissolved material (from previ-
ous usage).

Safe Handling of CMOS Devices

Complementary metal-oxide semiconductor (CMOS)
devices are used in this family of radios. While the
attributes of CMOS are many, their characteristics
make them susceptible to damage by electrostatic or
high voltage charges. Damage can be latent, resulting
in failures occurring weeks or months later. Therefore,
68P02945C75-A
Section 6

Maintenance

CAUTION
NOTE
6-1