Icom M604A Instruction Manual - Page 64

Troubleshooting

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10 TROUBLESHOOTING PROBLEM POSSIBLE CAUSE SOLUTION REF. The transceiver does • Bad connection to the power supply. not turn ON. • Check the connection between the battery- pp. 50, and the transceiver. 51 No sound comes from • Squelch level is too high. the speaker. • Volume level is too low. • Speaker has been exposed to water. • Internal speaker is turned OFF. Sensitivity is low. • The attenuator is activated. • Set [SQL] to the threshold point. • Adjust [VOL] to a suitable level. • Clear water from the speaker. • Turn the internal speaker ON in the Set mode. • Push [6• LO/DX ] after pushing [O] to turn the function OFF. p. 9 p. 9 p. 11 p. 48 p. 9 Transmitting is impos- • Some channels are programmed for only • Change channels. sible, or high power low power or receive by regulation. cannot be selected. • The output power is set to low. • Push [H/L] to select high power. pp. 7, 8, 61 p. 9 Scan does not start. • TAG channel is not programmed. • Set the desired channels as TAG channels. p. 15 No beep sounds. • Beep tones are turned OFF. • The squelch is open. • Turn the beep tone ON in the Set mode. • Set [SQL] to the threshold point. p. 48 p. 9 Receive signal cannot • Optional voice scrambler is turned OFF. • Turn the optional voice scrambler ON. be understood. • Scramble code is not set correctly. • Reset the scramble code. pp. 12, 49 Distress call cannot be • MMSI (DSC self ID) code is not pro- • Program the MMSI (DSC self ID) code. transmitted. grammed. p. 16 58

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58
TROUBLESHOOTING
10
PROBLEM
POSSIBLE CAUSE
SOLUTION
REF.
The transceiver does
not turn ON.
• Bad connection to the power supply.
•
Check the connection between the battery-
and the transceiver.
pp.
50,
51
No sound comes from
the speaker.
• Squelch level is too high.
• Volume level is too low.
• Speaker has been exposed to water.
• Internal speaker is turned OFF.
• Set
[SQL]
to the threshold point.
• Adjust
[VOL]
to a suitable level.
• Clear water from the speaker.
•
Turn the internal speaker ON in the Set
mode.
p. 9
p. 9
p. 11
p. 48
Sensitivity is low.
•
The attenuator is activated.
•
Push
[6•
LO/DX
]
after pushing
[
O
]
to turn
the function OFF.
p. 9
Transmitting is impos-
sible, or high power
cannot be selected.
•
Some channels are programmed for only
low power or receive by regulation.
• The output power is set to low.
• Change channels.
•
Push
[H/L]
to select high power.
pp.
7, 8,
61
p. 9
Scan does not start.
• TAG channel is not programmed.
•
Set the desired channels as TAG channels.
p. 15
No beep sounds.
• Beep tones are turned OFF.
• The squelch is open.
•
Turn the beep tone ON in the Set mode.
• Set
[SQL]
to the threshold point.
p. 48
p. 9
Receive signal cannot
be understood.
•
Optional voice scrambler is turned OFF.
• Scramble code is not set correctly.
• Turn the optional voice scrambler ON.
• Reset the scramble code.
pp.
12,
49
Distress call cannot be
transmitted.
•
MMSI (DSC self ID) code is not pro-
grammed.
•
Program the MMSI (DSC self ID) code.
p. 16