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16 MAINTENANCE
1 The SQL control is fully clockwise.
2 The Attenuator function is ON.
3 [SEND] was pressed, and the
transceiver is now in transmit
mode.
4 Mic [PTT] is pressed.
5 The receive bandwidth was
incorrectly set.
6 The wrong antenna connector
(ANT 1/ANT 2) was selected.
7 The receive preamplifier is OFF.
The RF control was set too low.
The wrong modulation mode was
selected.
1 The SQL control was not set
correctly.
2 Less than two memory channels
were unlocked.
3 Less than two memory channels
were programmed.
With Group Scan selected, the
channel you want to scan is in a
different group.
The start and end frequencies are
identical.
The impedance of the coaxial cable
and antenna was not matched.
•Tuning does not successfully finish
depending on conditions although
the SWR meter indicates smaller
than 3:1.
The SWR of the antenna system is too
high.
1 The microphone plug was not
inserted completely into the MIC
connector.
2 The Transmit Inhibit function is ON.
3 CW or FSK was selected instead of
a voice mode.
4 The filter for digital operation was
selected.
5 The wrong antenna connector
(ANT 1/ANT 2) was selected.
No signals are
received or receive
sensitivity seems
poor.
No signals are
received or receive
sensitivity seems
poor; S-meter is
reading full scale.
Received signals are
totally unintelligible.
Memory Scan will not
start scanning.
Memory Scan will not
scan one of the
stored channels; the
desired channel is
NOT locked out.
Program Scan will
not start scanning.
Tuning does not
finish successfully.
The internal tuner is
bypassed
immediately after
tuning is started.
You cannot transmit
even though you
press Mic [PTT] or
transmissions result
in no contacts.
1 Turn the SQL control
counterclockwise.
2 Press [ATT] to switch OFF function.
3 Press [SEND] to return to receive
mode.
4 Release Mic [PTT].
5 Review sections “IF FILTER” and
“CHANGING RECEIVE
BANDWIDTH”, and set the controls
accordingly.
6 Press [ANT] to select the other
antenna connector.
7 Press [PRE-AMP] to switch ON
function.
Turn the RF control fully clockwise.
Press [LSB/USB], [CW/FSK], or
[FM/AM] to select the correct
modulation mode.
1 Adjust the SQL control to just
eliminate background noise.
2 Unlock at least two memory
channels.
3 Store data in at least two memory
channels.
Select the group that contains the
memory channel you want to scan.
Store different start and end
frequencies.
Adjust the antenna system to lower the
SWR.
Adjust the antenna system to lower the
SWR.
1 Turn OFF the power, ensure the MIC
connector has no foreign objects in
it, then plug in the connector.
Secure the connector with the
locking ring.
2 Change Menu No. 38 to OFF.
3 Press [LSB/USB] or [FM/AM] to
select a voice mode.
4 Change Menu No. 32 to OFF.
5 Press [ANT] to select the other
antenna connector.
14
37
15
15
36,37
48
37
13
14
14
44
39
47
43
1
52
3
18
14
18
48