MAINTENANCE
MTM700
Mobile Radio / Detailed Service Manual
7 - 1
CHAPTER 7
MAINTENANCE
Introduction
This chapter provides details about the following:
•
Preventive maintenance (inspection and cleaning).
•
Safe handling of CMOS and LDMOS devices.
•
Repair procedures and techniques.
•
Disassembly and reassembly of the radio.
•
Exploded views and parts lists
Preventive Maintenance
The radios do not require a scheduled preventive maintenance program; however, periodic visual
inspection and cleaning is recommended.
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.
Cleaning
The following procedures describe the recommended cleaning agents and methods to be used
when cleaning the external and internal surfaces of the radio. External surfaces should be cleaned
whenever a periodic visual inspection reveals the presence of smudges, compound, or grime. Inter-
nal surfaces (circuit boards and components) should be cleaned only when the radio is disassem-
bled for servicing or repair.
The only recommended agent for cleaning external radio surfaces is a 0.5% solution (one teaspoon
of detergent per gallon of water) of mild dishwashing detergent in water. The internal surfaces
should be cleaned only with isopropyl alcohol (70% by volume).
NOTE:
Internal surfaces should be cleaned only when the radio is disassembled for service
or repair.
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.
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