Motorola PRO2150 Instrukcja serwisowa - Strona 15

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Chapter 2 Maintenance

2.1

Introduction

This chapter provides details about the following:

• Preventive Maintenance

• Safe Handling of CMOS and LDMOS Devices

• General Repair Procedures and Techniques

• Disassembling and Reassembling the Radio

2.2

Preventive Maintenance

The radio does not require a scheduled preventive maintenance program; however, periodic visual

inspection and cleaning is recommended.

2.2.1

Inspection

Check that the external surfaces of the radio are clean, and that all external controls and switches

are functional. It is not recommended to inspect the interior electronic circuitry.

2.2.2

Cleaning Procedures

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.

NOTE: Internal surfaces should be cleaned only when the radio is disassembled for service or repair.

The only recommended agent for cleaning external radio surfaces is a 0.5% solution of a mild

dishwashing detergent in water. The only factory recommended liquid for cleaning printed circuit

boards and their components is isopropyl alcohol (70% by volume).

CAUTION: The effects of certain chemicals and their vapors can have harmful results on certain

plastics. Avoid using aerosol sprays, tuner cleaners, and other chemicals.

2.2.2.1

Cleaning External Plastic Surfaces

Apply the 0.5% detergent-water solution sparingly with a stiff, non-metallic, short-bristled brush to

work all loose dirt away from the radio. Use a soft, absorbent, lintless cloth or tissue to remove the

solution and dry the radio. Make sure that no water remains entrapped near the connectors, cracks,

or crevices.

2.2.2.2

Cleaning Internal Circuit Boards and Components

Apply Isopropyl alcohol (70%) 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. Make sure that controls or tunable components

are not soaked with alcohol. Do not use high-pressure air to hasten the drying process since this

could cause the liquid to collect in unwanted places. After completing 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.