MAINTENANCE MTP700 Portable Radio / Detailed Service Manual 6 - 1
CHAPTER 6
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
Preventive Maintenance
The portable radio does not require a scheduled preventive maintenance program. How-
ever, periodic visual inspection 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 Procedures
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. Internal surfaces (circuit boards and components) should
only be cleaned when the radio is disassembled 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 only be cleaned with isopropyl alcohol (70% by volume).
NOTE Internal surfaces should be cleaned only when the radio is disassembled for ser-
vice 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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