Troubleshooting - Icom IC-M710 Instruction Manual

22
8
TROUBLESHOOTING
What appears to be trouble may not be damaging or hard to solve.
Check the following chart before making any adjustments or
sending the transceiver to an lcom Service center.
PROBLEM POSSIBLE CAUSE
a:
Power does not come on • Power cable is improperly connected.
w
when [POWER] is • Blown fuse.
::
0
pushed.
ll.
No sound comes from the • The [SPEAKER] switch is turned ON.
speaker. • Microphone is not connected.
• RF gain is set too deeply and several
segments of the S-meter appear.
• The squelch is closed.
Sensitivity is low and only • Antenna is not properly matched to
strong signals are audi- the operating frequency.
ble.
w
>
jjj
• RF gain is set too deeply.
0
w
a:
• Wrong tuner condition is selected in
set mode.
Received audio is unclear • Wrong type of emission is selected.
or distorted.
• AGC is deactivated while receiving a
strong signal.
• Noise blanker is turned ON when
receiving a strong signal.
• The [CLARITY] control is rotated too
far clockwise or counterclockwise.
Your signal does not • The transmit power is set low.
reach as far away as usu-
al.
• Antenna tuner is improperly matched
to the operating frequency when man-
ual tuning is selected.
!:::
• CW or FSK mode is selected for voice
:!E
transmission.
1/)
z
<(
Transmit signal is unclear • Wrong type of emission is selected.
a:
I-
or distorted.
• Microphone is too close to your
mouth.
No contact is possible • Wrong transmit frequency is set.
with another station.
Frequency cannot be set • The [CE] key is not pushed (".,.."
via the keypad. does not appear) before digit entry.
• 2182 kHz is selected with the
>-
[2182KHz] switch.
<(
...J
All indicators appear and
• The highest contrast is selected in
D..
1/)
the channel number can- set mode.
i5
not be read.
FSK ITU channels cannot • SITOR operation is set to OFF in set
be selected. mode.
SOLUTION REF.
• Reconnect the cable securely. p. 15
• Check for cause, then replace the fuse p.21
with a spare one.
• Turn OFF the [SPEAKER] switch. p.2
• Connect the microphone to the [MICRO· p. 2
PHONE] connector.
• Push [FUNC], then [RX] to reset the RF p.9
gain. (RF GAIN 9 applies audio.)
• Push (SQL] switch to turn the squelch p. 9
OFF.
• Push [TUNE] to tune the connected p. 12
antenna tuner or select "automatic tun-
ing" using set mode when an optional
AT-130/E is connected.
• Push [FUNC], then [RX] to reset the RF p. 9
gain.
• Set to the proper condition for the con- p. 12
nected tuner.
• Push [MODE] to select the proper oper- p.8
ating mode.
• Push [AGC] to activate the AGC func- p. 9
tion.
• Push [NB] to turn the noise blanker p. 9
OFF.
• Adjust the [CLARITY] control to receive p.9
proper audio output.
• Push [FUNC], then [TX] to reset the p.8
transmit power. (RF-PWR 3 is maxi-
mum power.)
• Push [TUNE] to tune the connected p. 8
antenna tuner or select "automatic tun- or
ing" using set mode.
p. 12
• Push [MODE] to select J3E mode (or p.8
H3E, R3E etc.)
• Push [MODE] to select the proper oper- p. 8
ating mode.
• Speak into the microphone naturally -
and do not hold the microphone too
close to your mouth.
• Push [TX FREO] to check and store the p. 8
correct transmit frequency.
• Push [CE] (" .,.. "appears), then enter p. 7
the desired frequency.
• Push [2182KHz], then set the fre- p. 5
quency.
• Set to the proper display contrast. p. 14
• Set "SITOR" to ON in set mode. p. 12