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9 Maintenance
9.1 Daily Maintenance
Daily checks and periodic maintenance are recommended for you to enjoy the long steady
performance of the JHS-431. Those may enable earlier detection of problems and prevent the
problems from propagating. Table 9-1 lists recommended checks.
Table 9-1
9.2 Regular Inspection
Perform one or more transmission tests every month and check the functions of the JHS-431.
Step Check point Description
1 Battery
Make sure the Battery indicator does not light or blink on the
display of the JHS-431. If the Battery indicator lights or blinks,
charge the battery.
2 PWR/VOL control
Turn the control and make sure that the JHS-431 is powered on
and off and that the voice volume varies smoothly.
3 P0 Key (Monitor)
Set this switch to the OFF position and make sure you hear
noises. (See P.6 for details)
4 Transmitter output
Make sure the Transmit indicator lights while the JHS-431 is
transmitting.
5
Transmitting
condition
Make sure your JHS-431 can normally talk to and hear from the
remote station.
6 Charging terminals
Make sure the charging terminals are clean. If not, wipe them
clean with soft cloth or the like.
If finding any transceiver problem, call your local JRC distributor or sales office.
Do not let any unqualified personnel disassemble and repair the JHS-431.
If done, the operation and the function of the JHS-431 will not be assured.
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