Icom IC-2400A Instruction Manual page 41

MAINTENANCE
8-1 TROUBLESHOOTING
. Power does not
come ON.
. No sound comes
from the speaker.
. No contact possi-
ble with another
station.
. Repeater cannot
be accessed.
. Frequency cannot
be set.
. Scan does not
operate.
. All programmed
memories have
been erased.
e Polarity of the power con-
nection is reversed.
ə Blown fuse.
e The [MAIN SOL] or [SUB
SQL] control is turned too
far clockwise.
e The optional tone squelch
is turned ON when the
UT-40 is installed.
e The transceiver is set to
duplex.
e Wrong offset frequency is
programmed.
e Wrong subaudible tone fre-
quency is programmed.
ə The lock function is acti-
vated.
9 CALL CHANNEL mode is
selected.
e Manual-RIT or manual-
VXO function is activated.
e Squelch is open.
e Scan edge A equals B.
e All memory channels are
programmed as the skip
channel.
e Data error occurred in the
CPU RAM because of the
following problems:
- The backup battery is
empty.
- The CPU has been dam-
aged by static.
9 Reconnect the power cable
observing the proper polari-
ty.
9 Check the cause, then
replace the fuse.
eSet the [MAIN SOL] or
[SUB SQL] control at the
threshold point.
e Turn OFF the tone squelch
function. |
e Set to simplex.
e Correct the
quency.
€e Correct the
tone frequency.
offset fre-
subaudible
Be sure the offset and
subaudible tone frequencies
are independently program-
med on each memory
channel.
ePush the [SUB] switch
several times until "L"
disappears.
e Push the [VFO/M] switch
to leave CALL CHANNEL
mode.
e Push the [AFC] switch.
e Set the squelch threshold
point.
e Reset scan edges.
e:Cancel the memory skip
function in the desired
channel.
è Replace the backup bat-
tery.
Reset the CPU.
om