Troubleshooting - TECHWOOD DDR 94 Owner's Manual

TROUBLESHOOTING

To determine any problem with your receiver, always check the most obvious possible causes first. If any problem still
remains after your have checked the items below, consult your nearest TECHWOOD dealer.
Problem
Amplifier
When listening to the music in stereo,
left/right speakers sounds reversed.
Low hum or buzzer sound.
Sound is only heard from one channel.
Sound cuts off during listening to the
music or no sound even though power is
ON.
No sound.
Low bass response.
Tuner
An unusual hissing noise is heard when
listening to the broadcast in stereo, but not
heard when listening monaurally.
Noise is excessive in both stereo and
monaural broadcasts.
Sound is distorted and/or the volume level
becomes low.
Excessive distortion in the sound of stereo
broadcasts.
<Important :> The center and rear speakers only operate when the unit is set on a Surround Sound mode and
Surround Effects
the source material being played is recorded or broadcast in Dolby Digital, DTS or Dolby Pro Logic surround
sound. Stereo broadcasts or recordings will produce some rear channel effects when played in a surround mode.
However, mono sources will not produce any sound from the rear speakers.
No sound from the rear speakers.
No sound from the center speaker.
Remote Control Unit
Remote control not working.
Probable Cause
Speakers are connected wrong.
Power line of a fluorescent light is installed
near this product.
One of the input cords is disconnected.
The BALANCE control is set to one side.
Speaker impedance is less than prescribed
for this unit.
A/B Speaker selectors are turned off.
Speaker polarity (+/–) is reversed.
A slight noise may be heard because the
method used for modulation of FM stereo
broadcasts is different than that used for
monaural broadcasts.
Poor location and/or direction of the
antenna.
Transmitting station is too far away.
Broadcast signals are being disturbed.
Speaker system connections are not
correct.
SURROUND ON/OFF button is set to OFF.
Source being played is not recorded or
broadcast in surround sound or stereo.
One or more rear speaker wires is not
making good contact.
SURROUND mode button is not set to DOLBY
DIGITAL, DTS, DOLBY PRO LOGIC or 3 STEREO.
The batteries are exhausted.
The remote control unit is too far from the
receiver or out of the effective range.
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Remedy
After checking, if needed, reconnect.
Place this product as far away as possible
from electric devices with interference.
Connect the input cords securely.
Adjust the BALANCE control.
After turning off the power and then
turning it on again, reduce the volume or
change to the correct 8 ohm speakers.
Press the A or B speaker selector as applicable.
Check all speakers for correct polarity.
• Try reducing the treble sound by turning
the treble controls.
• Try changing the location, height and/or
direction of the antenna.
• Set the FM mode to monaural by
pressing the STEREO/MONO button.
(Note that the broadcast will then be
heard as monaural sound).
• If an indoor antenna is being used,
change to an outdoor antenna.
• Try using an antenna with more
elements.
Set the button to the desired surround
mode position.
Use surround or stereo source.
Check all rear speaker wires for good
connection.
Set the button to DOLBY DIGITAL, DTS,
DOLBY PRO LOGIC or 3 STEREO.
Replace with new batteries.
Operate the remote control unit
within the effective range.