UT-79 datasheet(32/36 Pages) ETC

32 / 36 page

TROUBLESHOOTING

PROBLEM

POSSIBLE CAUSE

SOLUTION

REF.

No power comes on.

• Power cord not connected properly.

• Blown fuse.

• Check the power cord connection.

• Check the polarity of the power connection, then,

replace the fuse.

p. 23

p. 26

No sound comes from the

speaker.

• [SQUELCH] is rotated too far clockwise.

• Rotate [SQUELCH] counterclockwise to a suit-

able position.

p. 8

• [SQUELCH] is rotated too far clockwise.

• Antenna feedline or the antenna connector sol-

der has poor contact or is short circuited.

• Rotate [SQUELCH] counterclockwise to a suit-

able position.

• Check, and if necessary, replace the feedline or

solder the antenna connector again.

p. 8

p. 23

• Transmission is restricted on some channels.

• Change channels.

p. 29

Desired channel cannot be

selected.

• Different channel group is selected.

• Push and hold [CH/WX • U/I/C] to select the ap-

propriate channel group (U.S.A., INT or CAN).

p. 7

No display backlighting.

• Backlight function is turned OFF.

• While pushing [HI/LO • DIM], rotate the channel

selector to select the desired brightness.

p. 11

Scan does not start.

• No “TAG” channels are programmed.

• Set channels to be scanned as “TAG” channels.

p. 10

Receive signal cannot be un-

derstood.

• Voice scrambler has been turned OFF.

• Voice scrambler code has not been set correctly.

• Install the optional UT-79, then activate the func-

tion.

• Reset the scramble code.

p. 8

p. 20

Sensitivity is low and only

strong signals are audible.

Transmitting is impossible or

high power cannot be se-

lected.

No beeps sound even when a

switch is pushed.

• Beep function is turned OFF.

• Set beeps to ON in SET mode.

p. 20

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