3. iim case of difficulty – Kenwood TM-431E User Manual
Page 36
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6-3. IIM CASE OF DIFFICULTY
The
problems
described
in
this
table
are
failures
caused,
in
general,
by
improper
operation
or
connection
of
the
transceiver,
not
by defective components. Examine and check according to the following table.
Symptom
Probable cause
Corrective action
Indicators do not light and no receiver noise is
heard when the POWER switch is turned on.
1. Bad power cable or connections.
2. Blown power supply fuse.
1. Check cables and connections.
2. Check for the cause of the blown fuse and
replace the fuse.
No sound from the speaker. No signal can be
received.
1. Squelch is closed.
2. With the TSU-6: CTCSS is operating.
1. Turn the SQL control counterclockwise.
2. Press the TONE/T.ALT key to turn off the
CTCSS.
No transmitter output.
1. Microphone jack is not plugged in.
2. Poor antenna connection.
1. Plug jack in.
2. Connect antenna securely.
Weak signal cannot be received.
Poor antenna connection.
Connect antenna securely.
Display is dark.
1. Power voltage is low.
2. The DIM key had been pressed.
1. Check voltage for 13.8 VDC ±15%.
2. Press the F key and the LOW/DIM key.
No control works.
LOCK is ON.
Set the Microphone Lock key to OFF position.
Memory cannot be backed up.
Backup battery voltage is low.
See Microprocessor memory back-up page
21.
36