■ Troubleshooting The following chart is designed to help you correctproblems which are not equipment malfunctions.If you are unable to locate the cause of a problem orsolve it through the use of this chart, contact you near-est Icom Dealer or Service Center.DD Receiver powerDD ReceivingPROBLEM POSSIBLE CAUSE SOLUTION REF.No sounds come out fromthe speaker.Sensitivity is too low, andonly strong signals areaudible.Received audio is unclearor distorted.The [ANT] switch does notfunction[AFC] cannot be turnedON.[AUTOTUNE](AFC) can-not be turned ON.[VSC] cannot be turnedON.[ANF] cannot be turnedON.[ N O T C H 1 ] / [ N O T C H 2 ]cannot be turned ON.The filter width cannot bechanged.A synthesized voice is notemitted when pushing[SPCH].• Volume level is too low.• The squelch is closed.• The RF gain is too decreases sensitivity.• The antenna is not connected properly.• The attenuator is activated.• A different antenna for HF band is selected.• Wrong operating mode is selected.• PBT function is activated.• Noise blanker is turned ON when receiving astrong signal.• Preamp is activated.• The noise reduction is activated and the [NR]control is too far clockwise.• The selected frequency is above 30 MHz.• The operating mode is not set in FM or WFMmode.• The operating mode is set in FM, WFM, FSKor P25 mode.• The operating mode is set in CW, FSK or P25mode.• The operating mode is not set in FM or WFMmode.• The operating mode is set in FM, WFM or P25mode.• The operating mode is set in WFM or P25mode.• “SPEECH Mix” in the others set mode is OFF.• Rotate [AF] clockwise to obtain a suitable lis-tening level.• Turn [SQL] to 10 o’clock position to open thesquelch.• Rotate [RF GAIN] clockwise to obtain anenough sensitivity.• Re-connect the antenna.• Push [ATT] several times to select “ATT OFF.”• Push [ANT] several times to select the correctantenna for the HF band.• Select a suitable operating mode.• Push [PBT CLR] for 1 sec. to reset the function.• Push [NB] to turn the noise blanker OFF.• Push [P.AMP] once or twice to turn the functionOFF.• Set the [NR] control for maximum readability.• Select a frequency below 30 MHz.• Select FM or WFM mode to activate AFC.• Select AM, SSB or CW mode to activate AUTO-TUNE.• Select FM, WFM, AM or SSB mode to activateVSC.• Select FM or WFM mode to activate ANF.• Select AM, SSB, CW and FSK mode to activateMN1/MN2.• Select FM, AM, SSB, CW and FSK mode.• Set “SPEECH Mix” to All or Operation in the setmode.p. 3-8p. 3-8p. 3-8—p. 5-9p. 9-3p. 3-7p. 5-11p. 5-15p. 5-9p. 5-16pgs. 3-4,9-3pgs. 3-7,5-17pgs. 3-7,5-17pgs. 3-7,8-3pgs. 3-7,5-16pgs. 3-7,5-16pgs. 3-7,5-12p. 11-11PROBLEM POSSIBLE CAUSE SOLUTION REF.12-212 MAINTENANCEPower does not come onwhen the [POWER] switchis pushed.• Power cable is improperly connected.• The internal power supply is turned OFF.• The fuse is blown.• Re-connect the AC power cable correctly.• Turn the internal power supply ON.• Check for the cause, then replace the fuse.—p. 3-2p.12-8
