TU 940 (serv.man4) - Harman Kardon Audio User Guide / Operation Manual. Page 14

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14

This unit is designed for trouble-free operation. Most problems users encounter are due to operating errors. So, if you have a problem, first check this list for a possible solution. If
the problem persists, consult your authorized Harman Kardon Service Center.

Neigther the POWER LED nor the display illuminate
when the power cord is plugged into an AC outlet.

The power cord is not plugged into a live outlet.

Make sure cord is plugged in securely.
Make sure the outlet is active.

No sound is heard.

The tuned station is not broadcasting or is too weak and the 

FM MODE is not turned to MONO (sound is muted).
The input or speaker switch of the amplifier is not in the correct
position.
The connection wires are disconnected or broken.

Tune to a active station.

Check for correct amplifier settings.

Check the connections and wires.

FM sound has a large amount of interference.

The antenna is improperly connected.
The antenna is poorly located or directed.
There is interference from an adjacent station or several other 
strong stations.

Check antenna wires and connections.
Change the location, height, and/or direction of the antenna.
Turn the RF BAND to NARROW and/or the RF MODE to
LOCAL.

“STEREO” indicator does not light. 

The transmitting station is too far away.

If an indoor antenna is being used, replace it with an outdoor
antenna.

Sound distorts, particulary in stereo mode.

Broadcast signals reflected by nearby buildings or mountains are
interfering with signals received directly from the transmitting station.

Use a more directional antenna.

Intermittent or continuous buzzing or hissing.

Unit is being affected by nearby electric appliances 
(fluorescent lights, TV, motors, etc.)

Place the unit farther away from these appliances.
Install noise filters on the appliances.

Stations cannot be preset.

The ”PRESET” display is not flashing when the desired Preset 
button is pressed.

Repeat steps on page 9 and re-enter desired station into the
preset memory. Be sure that the “PRESET” display is flashing
when a Preset button is pressed.

Station cannot be selected with the Preset button.

Stations have not been entered into the memory.

Enter stations into the memory as per steps on page 9.

Absent or incomplete RDS data from station listed 
as transmitting RDS.

The station is too weak (RDS and STEREO 
indicators do not light).

Use an external and/or more directional antenna or tune to a
stronger station with the same program.

Radio reception is not optimum.

Station is not tuned properly.
Antenna is not connected properly.

Check the tuning.
Check the antenna connection and/or adjust its position.

The tuner locates few stations.

The antenna signals received are too weak.

Check the antenna connection. Adjust the position of the rele-
vant antenna. If this does not give satisfactory results, the sta-
tions received are too weak. In this case, consider connection
to external antennas or cable network. If these are already
fitted, check their connections.