Icom IC-T7H Instruction Manual

Also see for IC-T7H: Instruction manual Service manual

TROUBLESHOOTING 627If your transceiver seems to be malfunctioning, please checkthe following points before sending it to a service center.PROBLEM POSSIBLE CAUSE SOLUTION REF.No power comes on. • The battery is exhausted.(A slight current flows in the circuits even whenthe power is OFF.)• Poor plug connection to the external DC powercable.• Charge the battery pack or place new dry cell bat-teries in the battery case.(Remove the battery pack if you will not be usingthe transceiver for a long time.)• Check the connector or remove and replace thecable.pgs. 7,8—Transmitting is impossible. • The battery is exhausted. • Charge the battery pack or place new dry cells inthe battery case.pgs. 7,8Frequency cannot be set. • Memory mode, call channel or channel indicationmode is selected.• The lock function is activated.• Push [VFO] to select VFO mode.• Set [LOCK] down to deactivate the lock function.p. 10p. 12Scan does not function. • The same frequencies are programmed into XAand XB.• Program different frequencies. p. 18[Y] or [Z] keys do not func-tion when using the optionalHM-75A.• Memory channels 1 and/or 2 are not programmedand simple mode is selected.• Program the memory channels or set to micro-phone normal.p. 15Squelch does not open forreceived signals.• Tone squelch is activated. • Turn OFF the tone squelch. p. 21No beep sounds even whena key is pushed.• Beep tones are turned OFF in initial set mode. • Set beep tones ON in initial set mode. p. 24