Kenwood TM-255E - Manual (Page 55)

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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, and are not caused by a circuit failure. Please review this table, and the appropriate
section(s) of this Instruction Manual, before assuming your transceiver is defective.
Problem Symptom Probable Cause Corrective Action
Page
Ref.
The transceiver will not
power up after 1 The DC power supply is not switched
ON.
1 Switch the DC power supply ON. 3
connecting a
13.8 V DC power
supply and pressing
[POWER]. Nothing
2 The power cable is faulty. 2 Inspect the power cable. Confirm
polarities are correct.
Red: positive (-i-): Black: negative (-).
2, 3
appears on the
Display.
3 The power cable is not connected
securely.
3 Confirm the power connectors are
pressed together and are locked in
place by the locking tab.
2, 3
4 The power cable fuse is open. 4 Look for the cause of the blown fuse.
After inspecting and correcting any
problems, install a new fuse with the
same rating.
2,3
5 The cable connecting the Front Panel
and the Main Unit is disconnected.
5 Connect the cable. 4
After switching the
power ON, the
1 The input voltage is outside 13.8 V
DC ±15% (11.7 to 15.8 V DC).
1 Correct the input voltage.
2,3
transceiver does not
function normally.
2 The microprocessor has
malfunctioned.
2 Do a Full Reset by pressing
[MR]+ POWER ON.
34
The Display is too dim. 1 The Display Brightness needs
changing.
1 Change the Display Brightness via
Menu A, No. 00.
13, 39
2 The Automatic Power OFF (APO)
function has timed out.
2 Press [POWER] twice. 37
3 The supply voltage is too low. 3 The supply voltage requirement is
13.8 V DC ±15% (11.7 to
15.8 V DC). If the input voltage is
outside this range, adjust your
regulated power supply or recharge
your battery.
2,3
No sound comes from 1 The squelch is closed. 1 Reset the squelch threshold. 16
the speaker even
though the VOL
control is turned
clockwise.
2 DTSS is ON ("DTSS" is visible);
DTSS codes that you are receiving
are different from the code set in
your transceiver.
2 To monitor activity, press the key
combination [F], [SHIFT] twice to
turn OFF DTSS. To contact stations
using DTSS, review the "DTSS"
section.
41
3 Page is ON ("P" is visible): Page
codes that you are receiving are
different from those set in your
transceiver.
3 To monitor activity, press
[F], [SHIFT] to turn OFF Page. To
contact stations using Page, review
the "Page" section.
42
4 If the CTCSS option is installed,
CTCSS is ON ("CTCSS" is visible);
CTCSS tones that you are receiving
are different from the CTCSS tone
frequency set in your transceiver.
4 To monitor activity, press [TONE] to
turn OFF CTCSS. To contact
stations, review the "CTCSS"
section.
40
5 Tone Alert is ON ("Bell" icon is
visible).
5 Press [F], [TONE] to turn OFF Tone
Alert.
45
Buttons/keys and the 1 The Lock function is ON. 1 Press [F.LOCK] to turn Lock OFF. 36
Tuning control do not
function.
2 Microphone Lock is ON. 2 Slide the Lock switch on the rear of
the microphone to unlock the
microphone.
37
3 One or more of the Menu Lock
functions are ON.
3 Check the status of Menu B, Nos. 68
and 69.
37
Continued
48