Icom IC-T70A HD Instruction Manual - Page 83

Troubleshooting

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11 TROUBLESHOOTING If your transceiver seems to be malfunctioning, please check the following points before sending it to a service center. 1 PROBLEM POSSIBLE CAUSE Transceiver does not turn • The battery is exhausted. ON. • The battery polarity is reversed. SOLUTION REF. 2 • Charge the battery pack, or replace the batteries. pp. 2, 11-14 • Check the battery polarity. p. 11 3 • L oose connection of a battery pack (case). • Clean battery terminals. - 4 No sound comes from the • Volume level is too low. • Rotate [VOL] to adjust to a desired level. p. 16 speaker. • An external speaker or a cloning cable is con- • Check the external speaker connection or remove - 5 nected to the [SP] jack. the cloning cable. Transmitting is impossible. • A frequency outside of the 144/440 MHz ama- • Set the frequency within 144/440 MHz amateur p. 20 6 teur bands is set. bands. 7 • The PTT lock function is activated. • Set the PTT lock function OFF in the Initial set mode. p. 62 • The heat protection is activated, and "Hot" is • Cool down the transceiver. p. 23 8 displayed. Transmitting using the VOX • The VOX gain is set to OFF or too low. • S et the VOX gain to a suitable level. 9 p. 81 function is impossible. • The microphone gain is too low. • Set the microphone gain to a suitable level. p. 58 10 Contacting with another • Different tone or code is used for the tone/ • Check the tone/DTCS by performing a tone scan. p. 71 11 station is impossible. DTCS squelch. Frequency cannot be set. • The lock function is activated. • Push and hold [ ](SET) for 1 sec. to cancel the p. 21 12 lock function. • The memory mode, Call channel mode, or • Push [V/M/C] repeatedly to select the VFO mode. p. 18 13 weather channel mode is selected. 14 A program scan does not • The memory mode, Call channel mode, or • Push [V/M/C] repeatedly to select the VFO mode. p. 18 start. weather channel mode is selected. 15 • The same frequency has been programmed in • Programming different frequencies in the scan edge p. 43 16 the scan edge channels, "✱A" and "✱b." channels. A memory scan does not • The VFO mode or Call channel mode is selected. • Push [V/M/C] repeatedly to select the memory mode. p. 18 17 start. • Only one or no memory channel has been pro- • Program 2 or more memory channels. grammed. p. 31 18 The displayed frequency is • The CPU has malfunctioned. • Reset the transceiver. p. 75 19 erroneous. • External factors have caused a fault. • Remove and re-attach the battery pack/case. p. 2 76

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76
11
TROUBLESHOOTING
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
If your transceiver seems to be malfunctioning, please check the following points before sending it to a service center.
PROBLEM
POSSIBLE CAUSE
SOLUTION
REF.
Transceiver does not turn
ON.
• The battery is exhausted.
• The battery polarity is reversed.
• Loose connection of a battery pack (case).
• Charge the battery pack, or replace the batteries.
• Check the battery polarity.
• Clean battery terminals.
pp. 2, 11–14
p. 11
–
No sound comes from the
speaker.
• Volume level is too low.
• An external speaker or a cloning cable is con-
nected to the
[SP]
jack.
• Rotate
[VOL]
to adjust to a desired level.
• Check the external speaker connection or remove
the cloning cable.
p. 16
–
Transmitting is impossible.
• A frequency outside of the 144/440 MHz ama-
teur bands is set.
• The PTT lock function is activated.
• The heat protection is activated, and “Hot” is
displayed.
• Set the frequency within 144/440 MHz amateur
bands.
• Set the PTT lock function OFF in the Initial set mode.
• Cool down the transceiver.
p. 20
p. 62
p. 23
Transmitting using the VOX
function is impossible.
• The VOX gain is set to OFF or too low.
• The microphone gain is too low.
•
Set the VOX gain to a suitable level.
•
Set the microphone gain to a suitable level.
p. 81
p. 58
Contacting with another
station is impossible.
• Different tone or code is used for the tone/
DTCS squelch.
• Check the tone/DTCS by performing a tone scan.
p. 71
Frequency cannot be set.
• The lock function is activated.
• The memory mode, Call channel mode, or
weather channel mode is selected.
• Push and hold
[
]
(SET) for 1 sec. to cancel the
lock function.
• Push
[V/M/C]
repeatedly to select the VFO mode.
p. 21
p. 18
A program scan does not
start.
• The memory mode, Call channel mode, or
weather channel mode is selected.
• The same frequency has been programmed in
the scan edge channels, “
✱
A” and “
✱
b.”
• Push
[V/M/C]
repeatedly to select the VFO mode.
• Programming different frequencies in the scan edge
channels.
p. 18
p. 43
A memory scan does not
start.
•
The VFO mode or Call channel mode is selected.
• Only one or no memory channel has been pro-
grammed.
•
Push
[V/M/C]
repeatedly to select the memory mode.
• Program 2 or more memory channels.
p. 18
p. 31
The displayed frequency is
erroneous.
• The CPU has malfunctioned.
• External factors have caused a fault.
• Reset the transceiver.
• Remove and re-attach the battery pack/case.
p. 75
p. 2