Icom IC-905 Basic Manual page 81

Troubleshooting
Problem
The transmit signal is unclear or
distorted in the SSB mode.
The received audio in the SSB mode
is unclear or distorted.
Cannot contact with another station,
even if receiving and transmitting
seem normal.
There is no response after
transmitting.
The operating frequency does not
change when rotating
In the VFO mode, the operating
frequency is not properly changed by
rotating .
The display turns OFF.
The backlight brightness
automatically changes.
A Programmed scan does not start.
A Memory scan does not start.
A Select memory scan does not start. No, or only 1 memory channel is
While operating in the Memory mode,
you changed the operating frequency,
mode, and so on, but a selected
memory channel contents are not
changed.
Cannot hear the speech after
pushing .
"OVF" is displayed.
The spectrum scope's sensitivity is
too low, and only strong signals are
displayed.
Possible cause
The transceiver's microphone gain is
too high.
The incorrect sideband is selected.
The PBT function is activated.
The Split function is ON, and the
transmit and receive frequencies are
different. ( is displayed.)
The RIT function or the ∂TX function
is ON, and the transmit and receive
frequencies are different.
("RIT" or "∂TX" is displayed.)
The Duplex function is ON, and the
transmit and receive frequencies are
different.
The Dial Lock function is ON.
.
The function assigned to
wrong.
The Screen Saver function is ON.
(The POWER indicator blinks green.)
The Auto Adjust function is ON.
The same frequencies have been set
in the scan edges (00 ~ 24).
No, or only 1 memory channel is set.
assigned as a Select channel.
They were not overwrote already in
the selected memory.
The speech level is too low.
An excessively strong signal is being
received.
The reference level is too low.
10-4
MAINTENANCE
Solution
Adjust the MIC GAIN level so that the
meter reading swings between 30
and 50% of the ALC scale.
Toggle between USB and LSB.
Hold down to clear the
settings.
Touch [SPLIT] in the FUNCTION
screen to turn OFF the Split function.
Push to turn OFF the
function.
Touch [DUP] several times in the
FUNCTION screen to turn OFF the
Duplex function.
Hold down to turn OFF the Dial
Lock function.
is Push to turn OFF the RIT or
∂TX function.
Hold down to assign the
kHz Tuning Control or Select the
Memory Channel function.
Operate something (push key, and so
on) to reset the screen saver startup
time.
Touch [Auto Adjust] in the "LCD
Backlight" screen to turn OFF the
Auto Adjust function.
("Auto Adjusting" disappears.)
Set different frequencies in the scan
edges.
Set at least 2 memory channels.
Assign at least 2 memory channels
as Select channels for the scan.
When you want to save the changed
settings, touch [MW] for 1 second to
write them into the memory channel
on the VFO/MEMORY screen.
Adjust "SPEECH Level" in the
Speech setting.
Set the RF gain lower.
("RFG" is displayed.)
Turn ON the Attenuator.
Turn OFF the Preamplifier
(P.AMP OFF).
Set the reference level to a higher
level.
10
REF.
p. 3-9
p. 3-2
p. 4-5
p. 4-11
p. 4-2
AM
10
p. 3-8
p. 4-2
p. 1-8
p. 8-18
p. 8-18
AM
AM
AM
AM
p. 8-4
p. 3-9
p. 4-1
p. 4-1
p. 5-1