Watkins-Johnson Company WJ-8718-19/FE Instruction Manual page 154

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SECTION IV
MAINTENANCE .
4.1 GENERAL
This section provides detailed procedures to perform preventive and
corrective maintenance on the WJ-8718-19/FE HF Receiver. Preventive maintenance
helps prevent malfunctions or breakdowns. Corrective maintenance includes
procedures for returning a malfunctioning receiver to operating condition.
4.3 MODULE ACCESS
The receiver is a highly compact unit consisting of small printed circuit
assemblies, interconnecting cabling and chassis mounted components. Physical access
to all receiver assemblies is obtained by removing the top cover. Access to front
panel components is obtained by removing the front panel which is secured to the
receiver side panels.
4.3 PREVENTIVE MAINTENANCE
Preventive maintenance consists of visual inspection, cleaning and
lubrication. Although the WJ-8718-19/FE HF Receiver is designed for extended
operation with little or no routine servicing, optimum long-term performance can only
be achieved by a periodic preventive maintenance schedule. Table 4-1 is a
recommended schedule for performing preventive procedures.
Table 4-1. Preventive Maintenance Schedule
PROCEDURE INTERVAL COMMENTS
Cleaning 60 days Interval variable
depending on the
operating environment.
Inspection for damage 60 days Interval variable
depending on
operating environment
and equipment use.
Performance Tests 180 days Interval variable
d e p e n d i n g on
operating environment
and equipment use.
Adjustment/Alignment Adjustment/Alignment
keyed to results of
Performance Tests.
4-1