Komatsu PC290LC-6K Operation & Maintenance Manual page 78

Hydraulic excavator
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11. EXPLANATION OF COMPONENTS
11.13 CAB RADIO (OPTION)
Refer to the separate operation manual for radio cassette.
Note
Ensure radio is switched off when leaving the machine for long peri-
ods to prevent draining of battery charge.
Antenna
If the reception is weak or generates noise, extend the antenna. If the
reception is to strong, adjust the sensitivity by retracting the antenna.
NOTICE
When transporting the machine or parking it in a garage, always fully
retract the antenna to avoid the possibility of breakage.
11.13.3 PRECAUTION OF USE
To avoid safe operation, adjust the volume level so that external
noise is still audible.
Ensure no water is splashed over the speaker case or cab radio
(auto turning) to prevent unexpected malfunction.
Never use solution such as benzine or tinners to clean the dial or
buttons. These should be wiped with a dry, soft cloth. (Use a cloth
dipping in alcohol for very dirty surfaces.)
At battery replacement, all the memory pre-set with the pre-set but-
tons will be cleared. Perform pre-setting again.
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