18 TROUBLESHOOTING

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. 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

 

 

Ref.

 

 

 

 

 

 

 

The transceiver will not

1

DC power supply is OFF.

1

Switch ON the DC power supply.

2

power up after

2

Faulty power cable.

2

Inspect the power cable. Confirm

2

connecting a 13.8 V DC

 

 

 

polarities are correct.

 

power supply and

 

 

 

Red: positive (+); Black: negative (–)

 

pressing [

 

]. Nothing

3

The power cable is not connected

3

Confirm the connections to the DC

2

 

 

appears on the display,

 

securely.

 

power supply are secure.

 

and no receiver noise is

4

Power cable fuse is open.

4

Look for the cause of the blown fuse.

2

heard.

 

 

 

After inspecting and correcting any

 

 

 

 

 

 

 

problems, install a new fuse of the

 

 

 

 

 

 

 

specified rating.

 

 

 

 

 

 

 

 

 

After switching ON the

1

The input voltage is outside 13.8 V

1

Correct the input voltage or use a 12 to

2

power, the transceiver

 

DC ±15% (11.7 to 15.8 V DC).

 

16 V battery.

 

does not function

 

 

 

 

 

normally. For example,

2

The microprocessor has

2

Review “MICROPROCESSOR

92

no digits or incorrect

 

malfunctioned.

 

RESET”. After understanding what

 

digits appear on the

 

 

 

data will be lost, do a Partial Reset. If

 

display.

 

 

 

the problem remains, do a Full Reset.

 

 

 

 

 

 

 

After switching ON the

The internal TNC backup lithium

Have a new battery installed by your

99

transceiver, the internal

battery voltage is too low.

dealer or at a KENWOOD Service Center.

 

TNC resets to the

 

 

 

 

 

factory default values.

 

 

 

 

 

 

 

 

 

 

 

 

 

The transceiver does

1

Procedures are not being

1

Review “WRITING CONVENTIONS

i

not respond correctly

 

followed precisely.

 

FOLLOWED”.

 

after pressing key

2

The Frequency Lock function is

2

Press [FUNC], [ATT/ F LOCK] to

77

combinations or turning

 

ON.

 

switch the function OFF.

 

controls per instructions

3

The microprocessor and its

3

Review “MICROPROCESSOR

92

in this manual.

 

memory need resetting.

 

RESET”. After understanding what

 

 

 

 

 

 

 

data will be lost, do a Partial Reset. If

 

 

 

 

 

 

 

the problem remains, do a Full Reset.

 

 

 

 

4

The keys on the transceiver are

4

Stop operating the Tuning control, then

–

 

 

 

 

unavailable while operating the

 

press the appropriate keys.

 

 

 

 

 

Tuning control.

 

 

 

 

 

 

 

 

 

The frequency cannot

The Frequency Lock function or

Press [FUNC], [ATT/ F LOCK] to switch

77

be changed.

Lock All function is ON.

the function OFF.

 

 

 

 

 

 

Or press [FUNC], [PRE/ LOCK A] to

77

 

 

 

 

 

switch the function OFF.

 

 

 

 

 

 

 

 

 

SSB audio quality is

1

The wrong operation mode is

1

Select USB or LSB for the mode.

28

very poor; the high or

 

selected for the receiver.

 

 

 

low audio frequencies

2

The LO/ WIDTH control or

2

Turn the LO/ WIDTH control

55

are absent.

 

HI/ SHIFT control is incorrectly

 

counterclockwise and the HI/ SHIFT

 

 

 

 

 

set.

 

control clockwise.

 

 

 

 

3

Noise Reduction 1 or 2 is ON.

3

Press [N.R./ LEVEL] to switch the

56

 

 

 

 

 

 

function OFF.

 

 

 

 

4

Beat Cancel is ON.

4

Press [B.C./ MANUAL] to switch the

56

 

 

 

 

 

 

function OFF.

 

 

 

 

 

 

 

 

 

100