Sony ICF-SC1 Operating Instructions (primary manual) Operating Instructions Manual page 34

Will not pause scanning on a certain frequency.
It is designated a SKIP frequency (page 28).
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Cannot keep the receiver on scanning pause.
Priority Scanning is active and the receiver received the
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priority channel (page 26).
Scanning pause time is set to the 5-second pause mode
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(page 30).
The display is dim.
Weak batteries.
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The receiver is being used in extremely high
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temperatures or excessive humidity.
Cannot memorize a frequency
The memorizing procedure is incorrect (page 22).
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Cannot input a frequency with Direct Tuning.
You took more than 10 seconds between the digits.
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You tried to input a frequency beyond the frequency
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range of the receiver.
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