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Troubleshooting
NO LIGHTS ON THE UNIT
Check that:
the power cord is plugged into the P7 and the mains socket
outlet it is plugged into is switched on.
the plug fuse has not failed, or a circuit-breaker earlier in the
power supply path has not opened.
the power button is pressed in.
RED LED PRESENT
Refer to the ‘Fault Status Indicators’ table if you have an unusual
sequence of LEDs.
NO SOUND IS PRODUCED
Check that:
the correct input has been selected on the pre-amp.
you have assigned the digital input to the correct input source.
the volume is turned up to a reasonable level and ‘MUTE’ is not
displayed on the front panel display on the pre-amp.
your power amplifier(s) are turned on and working correctly.
SOUND IS POOR AND BADLY DISTORTED
Check that:
all cables are making a good connection. If necessary withdraw
the cable from the connector and plug it back in again. (Turn the
power off before doing this.)
you have selected the correct size of speakers to suit your
system in the setup menu of the processor or pre-amp.
SOUND ONLY COMES FROM SOME OF THE
SPEAKERS
Check that:
all speakers in the system are connected to the P7.
you have configured your pre-amp to include all the speakers in
your system.
you have an appropriate surround sound source selected and
playing through the pre-amp.
for digital sources, check the player is outputting multichannel
data. With some DVD players you are able to select in what
format multi-format encoded discs are outputted, and whether
multichannel data is down mixed to PCM (stereo).
the disc you are playing is a multichannel recording and that the
processor is outputting multichannel audio.
your speaker balance is correct.
all amplifiers are turned on and all channels are working
correctly.
all units are turned on. If the audio is ‘daisy-chained’ from the P7,
make sure that the unit being fed is turned on.
HUM ON AN AMPLIFIER OUTPUT
Check that:
all cables are making a good connection. If necessary withdraw
the cable from the connector and plug it back in again. (Turn the
power off before doing this.)
if the hum originates from a ground loop caused by an aerial,
satellite dish or cable supply, you should contact your aerial
contractor.
the signal (interconnect) leads are not wrapped around a mains
lead.
try switching the ground lift on the back panel of the processor
(if available).
THERE IS RADIO/TELEVISION RECEPTION
INTERFERENCE
The P7 has been designed to a very high standards of electromagnetic
compatibility.
Check that:
the aerial/dish cable is routed as far as possible from your P7 and
its cabling.
the cabling used from the aerial/dish is of high quality and
screened.
repositioning the receiving aerial/dish as far as possible from your
P7 and its cabling may bring an improvement.
if the problem persists, contact your aerial contractor.
you are using high quality screened audio cable between your
equipment and that no cables are broken or damaged.