Maintenance Of The Interna! Circuits; Radio Lnterference Precautions; Precautions Against Power Surge Caused By Lightening - JRC JRL-2000F Manual

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PRECAUTIONS ON MAINTENANCE AND OPERATION
9
9.2 Maintenance of the lnternal Circuits
1d lt is not required to perform adjustment on the JRL-2000F internal circuits as they are completely
preadjusted at the factory.
:er lf, however, any problems occur during normal handling and operation, contact your dealer
or your local JRC representative.
Jly
lrs
1al
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9.3
Attention
JRC is not held responsible for any problems arising from intentional readjustment
or modification of the internal circuits by the user.
Radio lnterference Precautions
Ham radio transmitters may, under certain circumstances, cause interference to domestic
television sets, radios, stereos etc. Of course, such problems are usually not entirely attributable
to the ham radio station.
JRC, as a manufacturer, conducts very thorough adjustment and inspection in an attempt to
prevent undesired or spurious radiation. lf, however, radio interference does occur during
operation, stop transmitting immediately. Special care should be taken in regard to the following
and appropriate measures should be taken.
• lf it has been ascertained that a ham station is causing interference to television and radio
reception by its radio waves, you should stop transmitting immediately to verify the presence
or absence of interference and the degree of interference.
• lf it has been ascertained that the interference has been caused by your ham station, inspect
the transmitter and antenna system and take appropriate measures according to the degree
of interference.
9.4 Precautions Against Power Surge Caused by Lightning
When there is electrical storm activity in the area, lightening surge pulse may be induced
in the antenna. in such a case, the radio may be struck by a surge of very high voltage.
in order to minimize darnage by lightning cciming in via the antenna, the JRL-2000F is equipped
with a high-speed arrestor. Nevertheless, relays in the output circuit, tuner circuit, the final-
stage amplifier etc, may be damaged due to their highly precise and delicate circuit
configurations.
Therefore, the user is advised to stop operation immediately and turn off the power supply
when an electrical storm threatens.
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