Motorola SYMBOL MT2000 Series, Руководство по обслуживанию

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41
Maintenance
7
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
In order to avoid operating outside the limits set by the FCC, it is
recommended that the reference oscillator of the HT 1000, JT 1000,
MT 2000, MTS 2000, and MTX radio be aligned every time the radio is
disassembled, or once a year, whichever comes first. Periodic visual
inspection and cleaning are also 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 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, chassis
(rear cover), 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®, in water.
The only factory recommended liquid for cleaning the printed circuit
boards and their components is isopropyl alcohol (70% by volume).
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 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.
!
C a u t i o n
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.