Chapter 5 Disassembly/Reassembly Procedures
5.1 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 Control Head.
5.2 Preventive Maintenance
Periodic visual inspection and cleaning is recommended.
5.2.1 Inspection
Check that the external surfaces of the Control Head are clean, and that all external controls and
switches are functional. It is not recommended to inspect the interior electronic circuitry.
5.2.2 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 Control Head. 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 Control Head is disassembled for service
or repair.
The only recommended agent for cleaning the external Control Head surfaces is a 0.5% solution of
a mild dishwashing detergent in water. The only factory recommended liquid for cleaning the printed
circuit boards and their components is isopropyl alcohol (100% by volume).
Use all chemicals as prescribed by the manufacturer. Be sure to follow all
safety precautions as defined on the label or material safety data sheet.
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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