Troubleshooting Guide - Technics SC-EH750 Operating Instructions Manual

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Troubleshooting guide
Common problems
ECO mode is on but the
display pane! still fights up.
Humming is heard while
playing.
DEMO mode is on.
Turn DEMO mode off.
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Probable cause(s) Suggested remedy | Page |
12
A power cord or fluorescent lamp is located in
the vicinity of cables.
Keep electric appliances away from the stereo.
Try plugging the cord in the other way.
Only one speaker Is
emitting sound.
There is no sound when a
source is being played.
One of the wires of the speaker cord is
disconnected.
Connect the speaker cord correctly,
6,7
The (+) and (—) wire of the speaker cords
are shorted,
Switch the system to the standby mode, and
reconnect the speaker cords so that they are
not shorted. Then switch on the power.
"U70" appears on the
display,
Flat cables are not connected steadily.
Connect the flat cable steadily.
When the "U70" display is not cleared after the
flat cable have been connected properly, the
unit is damaged. Consult your dealer.
6,7
"ERROR" message appears
on the display.
Wrong operation has been done.
Operate the unit correctly by following the
operating instructions.
2d 7
4,
'~-;--" appears on the
display.
®You plugged the power cord in for the first
time.
eThere was a power failure recently.
Set the time.
There is a "rushing noise"
during a stereo broadcast
which Is not audible during
a moneural broadcast.
While listening to FM broadcasts
The transmitting station is a long distance
away.
You hear excessive noise
during a stereo broadcast,
and occasionally the sound
disappears.
The installation location and orientation of the
antenna are unsuitable.
The stereo indicator flickers
and does not light
completely.
The transmitting station is a long distance
away.
Hf you are using an indoor antenna, change to
an outdoor antenna.
13
Ls
The power of the TV set or VCR is ON.
The sound during a stereo
broadcast is highly
distorted.
There is a building or mountain nearby.
[Distortion is caused by interference between
the signal from the transmitting station (direct
wave) and the signal reflected from the
building or mountain (reflected wave).]
Try switching off the TV set or VCR. a
—
Use a high-grade outdoor antenna, and install it
in a good location, height, and orientation for
reception.
[ While listening to AM broadcasts
You hear an unusual beat
sound,
You hear a low-frequency
hum.
You are using the system at the same time
you are playing a TV set.
The antenna wire is too close to the flat
cables/power cord.
Switch off the TV set, or use the system further
away from it.
Move the antenna away from the flat cables/
power cord.
The correct frequency can
not be received.
Frequency step is set to 10 kHz.
Hold down the [TUNER/BAND] for about
10 seconds (change frequency step to 9 KHz).
When there is a television set nearby
The picture on the TV
disappears or stripes
appear on the screen.
The location and orientation of the antenna
are incorrect.
The TV antenna wire is too close to the
system.
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If you are using an indoor antenna, change to
an outdoor antenna.
Separate the antenna wire of the TV set from
the system.