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| TROUBLE | PROBABLE CAUSE | REMEDY |
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| Key input is not accepted | "REM" appears when controlled |
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| external equipment | by external equipment. Suspend |
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| operation of external operation. |
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| Antenna coupler can’t tune | Antenna may be disconnected or | Check antenna connection. | |
| antenna | shorted to ground |
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| Antenna is out of tunable length. | Recommended length is 7 to 30 |
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| meters. |
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| Poor grounding of the coupler. | Check coupler ground. |
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| Breaker in coupler has tripped. | Check mains voltage and |
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| polarity. If they are normal, |
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| reset breaker. |
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| Connection cable loosened or | Check cable. |
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| disconnected. |
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| Can not tune in a broadcast | Missing last numeral at the digit | To tune in 9640 kHz for |
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| station | of 1 when trying to tune in the | instance, press [RX], [9], [6], |
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| station. | [4], [0], [0], [ENT]. Do not |
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| miss the last [0]; otherwise you |
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| will set 964.0 kHz. |
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| Wrong setting of MODE | Select H3E. |
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| The station is off air | Select another frequency. |
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