Troubleshooting - Icom IC-T70A Instruction Manual

If your transceiver seems to be malfunctioning, please check the following points before sending it to a service center.
PROBLEM
Transceiver does not turn • The battery is exhausted.
ON. • The battery polarity is reversed.
• Loose connection of a battery pack (case).
No sound comes from the • Volume level is too low.
speaker. • An external speaker or a cloning cable is con-
nected to the [SP] jack.
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.
Transmitting using the VOX • The VOX gain is set to OFF or too low.
function is impossible. • The microphone gain is too low.
Contacting with another • Different tone or code is used for the tone/
station is impossible. DTCS squelch.
Frequency cannot be set. • The lock function is activated.
• The memory mode, Call channel mode, or
weather channel mode is selected.
A program scan does not • The memory mode, Call channel mode, or
start. weather channel mode is selected.
• The same frequency has been programmed in
the scan edge channels, "✱A" and "✱b."
A memory scan does not • The VFO mode or Call channel mode is selected.
start. • Only one or no memory channel has been pro-
grammed.
The displayed frequency is • The CPU has malfunctioned.
erroneous. • External factors have caused a fault.
POSSIBLE CAUSE

TROUBLESHOOTING

SOLUTION
• Charge the battery pack, or replace the batteries.
• Check the battery polarity.
• Clean battery terminals.
• Rotate [VOL] to adjust to a desired level.
• Check the external speaker connection or remove
the cloning cable.
• Set the frequency within 144/440 MHz amateur
bands.
• Set the PTT lock function OFF in the Initial set mode.
• Cool down the transceiver.
• Set the VOX gain to a suitable level.
• Set the microphone gain to a suitable level.
• Check the tone/DTCS by performing a tone scan.
• Push and hold [ ](SET) for 1 sec. to cancel the
lock function.
• Push [V/M/C] repeatedly to select the VFO mode.
• Push [V/M/C] repeatedly to select the VFO mode.
• Programming different frequencies in the scan edge
channels.
• Push [V/M/C] repeatedly to select the memory mode.
• Program 2 or more memory channels.
• Reset the transceiver.
• Remove and re-attach the battery pack/case.
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