Maintenance And Inspection; General Maintenance And Inspection; Inspection Of The Antenna System - JRC JHS-32B Instruction Manual

MAINTENANCE AND INSPECTION

The performance and lifetime of the JHS-32B depend on careful maintenance. This chapter
describes maintenance and inspection, self test, and outline of adjustment.
5.1
Maintenance and Inspection
5.1.1

General Maintenance and Inspection

In order to operate the unit under optimum conditions, it is vital not only that regular inspections be
performed, but also that an accurate record of inspections be kept. Inspections enable problems to be
identified before they become major malfunctions.
The following inspections should be made regularly.
Inspection sequence
1 Antenna system
2 SQL operation
3 Receiver performance checked by
speaker output
4 Handset PTT switch
5 Transmission and reception checked
by performing radio communication.
5.1.2

Inspection of the Antenna System

The error message ANTENNA FAULT appears when the antenna system (including connectors and
cables) is defective. Check antenna and connectors. When the error message ANTENNA FAULT
appears, the transmission power (antenna power) is automatically reduced to 1w to protect the unit.
Inspected item Procedure
Check that antenna and connectors are secure.
Pick up the handset and turn the SQL control
fully counterclockwise. Check for noise from the
speaker. Check whether noise is suppressed by
turning the SQL control clockwise.
Check that the voice level and noise level are
not abnormally loud or soft.
Press PTT and check that the unit transmits
immediately and that TX is displayed.
Check that normal conversation is possible.
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