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E-9
English
trouble-
shooting
No Lights on the Unit
Check that:
< the power cord is plugged into the P777 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 (overleaf) if
you have an unusual sequence of LEDs.
No sound is produced
Check that:
< the correct input has been selected on the pre-
amplier.
< 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-amplier.
< your power amplier(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 o
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
P777.
< you have congured 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 ampliers are turned on and all channels are
working correctly.
< all units are turned on. If the audio is ‘daisy-
chained’ from the P777, make sure that the unit
being fed is turned on.
Hum on an amplier 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 o
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 li on the back panel of
the processor (if available).
There is radio/television reception
interference
e P777 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 amplier 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 amplier 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.