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75
7528%/(6+227,1*
7528%/(6+227,1*
The problems described in this table are commonly encountered operational malfunctions. These types of
difficulties are usually caused by improper hook-up, accidental incorrect control settings, or operator error due to
incomplete programming. These problems are usually not caused by circuit failure. Please review this table and
the appropriate section(s) of this instruction manual before assuming your transceiver is defective.
Note: Placing a powered portable transceiver near this transceiver may cause noise in the transceiver.
Problem Probable Cause Corrective Action Page
The transceiver will
not power up after
connecting a 13.8 V
DC power supply and
pressing [
].
Nothing appears
on the display and
no receiver noise is
heard.
1 DC power supply is OFF.
2 Faulty power cable.
3 The power cable is not
connected securely.
4 The power cable fuse is
open.
1 Switch the DC power supply ON.
2 Inspect the power cable. Confirm that the
polarities are correct (Red: positive (+); Black;
negative (–)).
3 Confirm the connections to the DC power
supply are secure.
4 Look for the cause of the blown fuse. After
inspecting and correcting any problems,
install a new fuse of the specified rating.
10
1
1
2
After switching
the power ON, the
transceiver does not
function normally. For
example, no digits or
incorrect digits appear
on the display.
1 The input voltage is outside
13.8 V DC ±15% (11.7 ~
15.8 V DC)
2 The microprocessor has
malfunctioned.
1 Correct the input voltage or use a 12 ~ 16 V
battery.
2 Review “MICROPROCESSOR RESET”.
After understanding what data will be lost, do
a VFO Reset. If the problem remains, do a
Full Reset.
1
78
After switching the
transceiver ON, the
transceiver refuses to
transmit.
The current rating of the DC
power supply is too low.
Use a DC power supply that has a 20.5 A or
higher current rating
1
The transceiver does
not respond correctly
after pressing key
combinations or
turning controls per
instructions in this
manual.
1 Procedures are not being
followed precisely.
2 The Frequency Lock
function is ON.
3 The microprocessor and its
memory need to be reset.
1 Review “WRITING CONVENTIONS
FOLLOWED”.
2 Press and hold [FINE (F.LOCK)] to switch
the function OFF. The “
” icon disappears.
3 Review “MICROPROCESSOR RESET”.
After understanding what data will be lost, do
a Partial Reset. If the problem remains, do a
Full Reset.
ii
53
78
The frequency cannot
be changed.
The Frequency Lock function
is ON.
Press and hold [FINE (F.LOCK)] to switch the
function OFF. The “ ” icon disappears.
53
SSB audio quality is
very poor; the high or
low audio frequencies
are absent.
1 The wrong operation mode
is selected for the receiver.
2 The IF filter is incorrectly
set.
3 Noise Reduction 1 or 2 is
ON.
4 Beat Cancel 1 or 2 is ON.
1 Select USB or LSB for the mode.
2 Turn the HI/SHIFT or LO/WIDTH control to
adjust the DSP filter width.
3 Press [NR (LEV)] until the NR function turns
OFF.
4 Press [BC (A.NOTCH)] until the BC function
turns OFF.
11
38
39
39
No signals are
received or receive
sensitivity seems
poor.
1 The SQL control is fully
clockwise.
2 The Attenuator is ON.
3 MIC [PTT] is pressed.
4 The IF filter bandwidth was
incorrectly set.
5 The wrong antenna
connector (ANT 1 or ANT
2) was selected.
6 The pre-amplifier is OFF.
7 An internal DSP error
occurs.
1 Turn the SQL control counterclockwise.
2 Press [ATT (RX ANT)] to switch the
Attenuator is OFF.
3 Release MIC [PTT].
4 Review “DSP FILTERS”, and set the
controls accordingly.
5 Press and hold [PRE (ANT 1/2)] to select the
other antenna connector.
6 Press [PRE (ANT 1/2)] to switch the function
ON.
7 Restart the transceiver by turning the power
OFF and then back ON. If the problem
persists, consult Kenwood authorized
Service Center.
12
40
13
38
50
40
—