Motorola HT 1000 service manual Introduction, Preventive Maintenance, Inspection Cleaning

Maintenance

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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

Inspection

Cleaning

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.

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.

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

Cleaning Circuit Boards and Components

!	The effects of certain chemicals and their vapors
	can have harmful results on certain plastics.
	Aerosol sprays, tuner cleaners, and other
C a u t i o n	chemicals should be avoided.

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.

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.

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