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GB-27 [ENGLISH]
TROUBLESHOOTING GUIDE
General (power supply)
SYMPTOM
POSSIBLE CAUSE
CORRECTIVE ACTION
The power turns off immediately after being turned on.
The protection circuit works to turn off the power because the power
is turned on with the speaker leads short-circuited.
Make sure that all the speaker leads are connected properly.
The unit is exposed to external strong electrical shocks caused by
lightning, excessive static electricity, etc.
Turn off the power, unplug the mains lead, plug the mains lead
approx. 30 seconds later, and turn on the power.
The unit does not operate properly.
The internal microcomputer is frozen due to external electrical shocks
(caused by lightning or excessive static electricity) or low power
supply voltage.
Unplug the mains lead from the outlet and then plug it in the outlet
approx. 5 seconds later.
Video
SYMPTOM
POSSIBLE CAUSE
CORRECTIVE ACTION
No picture (Or unusual screen size)
The TV is not set to receive video signals from the unit.
Select the correct input function on the TV so that it can receive
video signals from the unit.
The function selection is not proper.
Select the correct function.
The TV screen size setting is not proper.
Set the screen size properly according to the TV to be connected
to this unit.
Picture from external input device is not displayed.
TV set (Monitor) is not connected to the video output terminal of the
unit.
Connect TV set (Monitor) to the video output terminal of the unit.
Audio
SYMPTOM
POSSIBLE CAUSE
CORRECTIVE ACTION
No sound
The volume is turned down.
Adjust the volume.
The source selection is not proper.
Change the source selection according to the device to which the
audio input lead is connected.
An unplayable disc such as a CD-ROM is loaded.
Load a playable disc.
No sound comes out from the speakers other than the front speaker. (Red
lamp of the surround speaker with mains lead is lighted up)
A source or stereo source not containing an effect signal is played
back in the Dolby surround, Dolby digital or DTS mode.
The 2.1ch mode is selected.
Select another surround mode.
No sound comes out from the centre speaker.
The Dolby digital or DTS source does not contain a centre channel
signal is played back.
It is not a malfunction.
No sound comes out from the surround speaker.
The unit is affected by interference of the same frequency band or
multi-pass.
Changeover the transmission channel, or connect the assistant
speaker lead.
The unit is not power-ON or the system lead is not connected.
Turn ON the power, or connect the system lead.
An obstacle causes a good position and a bad position, depending on
the electric wave state.
Move slightly the front speaker (built-in transmitter) or the surround
speaker (built-in receiver) position.
The front speaker (built-in transmitter) and the surround speaker
(built-in receiver) are a pair and are separately purchased units.
The front speaker and the surround speaker must be purchased
as a unit. If not, independently configured systems will not
communicate.
No sound comes out from the subwoofer.
The deep bass is set “OFF”.
Set the deep bass to “BOOST 1”, “BOOST 2” or “NORMAL”.
A digital device or high-frequency device produces noise.
The unit is placed too close to such a digital device or high-frequency
device.
Place the unit away from such a device.
Skipping sound
The waves have light-like characteristics, such as reflection, refraction,
and diffraction. Therefore, the strength (or lack of strength) of the
electric wave may cause the sound to stop, depending on the place.
Change the place of installation.
The distance between the front speaker (built-in transmitter) and
surround speaker (built-in receiver) is too long.
Maintain a maximum distance of 10 meters.
Sounds are suddenly (and continuously) skipped.
Apparatus, such as Bluetooth and the wireless LAN, using the same
frequency band (2.4GHz) as near, or a microwave oven, is operating.
Install the equipment with enough distance from the other devices.
Static may appear on the television screen.
There is AV equipment with which the aerial is attached around the
front speaker (built-in transmitter).
Keep the front speaker (built-in transmitter) away from the aerial
input terminal of the AV equipment.