Icom IC-M504 instruction manual Troubleshooting, 9 10, Problem, Possible Cause, Solution

TROUBLESHOOTING 10

PROBLEM	POSSIBLE CAUSE	SOLUTION	REF.
The transceiver does	• Bad connection to the power supply.	• Check the connection to the transceiver.	p. 58
not turn ON.
No sound from speaker.	• Squelch level is too high.	• Set [SQL] to the threshold point.	p. 8
	• Volume level is too low.	• Set [VOL] to a suitable level.	p. 8
	• Speaker has been exposed to water.	• Drain water from the speaker.	—
Sensitivity is low.	• The Attenuator is activated.	• Push [LO/DX•IC•SCRM] to turn the function	p. 8
		OFF.
Transmitting is impossi-	• Some channels are programmed for low	• Change channels.	pgs. 6,
ble, or high power can	power or receive only in regulations.		7, 70
not be selected.	• The output power is set to low.	• Push [H/L] to select high power.	p. 8
Scan does not start.	• TAG channel is not programmed.	• Set the desired channels as TAG channels.	p. 13
No beeps.	• Beep tones are turned OFF.	• Turn the beep tone ON in Set mode.	p. 56
	• The squelch is open.	• Set [SQL] to the threshold point.	p. 8
Distress call cannot be	• MMSI (DSC self ID) code is not pro-	• Program the MMSI (DSC self ID) code.	p. 15
transmitted.	grammed.

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