Kenwood TM-451A - Manual (Page 103)

TROUBLESHOOTING
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 connecting a 13.8 V
DC power supply and pressing
1 The power cable is faulty. 1 Inspect the power cable. Confirm
polarities are correct. Red: positive
( + ); Black: negative ( —).
4,7
[PWR]. Nothing appears on
the Display.
2 The power cable is not connected
securely.
2 Confirm the power connectors are
pressed together and are locked in
place by the locking tab.
4,7
3 One or more of the power cable
fuses are open.
3 Look for the cause of the blown
fuse/fuses. After inspecting and
correcting any problems, install new
fuses with the same ratings.
6,8
The Display is too dim. 1 The Display Brightness needs
changing.
1 Change the Display Brightness via
Menu A.
64
2 The Automatic Power Off function
has timed out.
2 Press [PWR] twice.
63
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.
5,7
Continued
96