12
AC outlet.
5. Try a second IEC AC power cord. Although they rarely
fail, a failure is still remotely possible.
6. If the amplifier’s display ‘A’ letter still does not
illuminate with all these steps, then please
contact the Sonance dealer the amplifier was
purchased from or Sonance Technical Support:
TROUBLESHOOTING: NO AUDIO
Applicable to one or both paired channels, such
as the 16-50’s or 8-50’s 1L and 1R inputs below. For
troubleshooting, a ‘source’ is defined as the audio
component providing line-level audio into the 8-50, such
as the second zone outputs on an AV receiver, a pair of
zone outputs of a multi-zone controller, music server,
tuner, iPhone, etc.
Potential Reasons:
•
A fault in the interconnect cable between the source
and the amplifier.
•
RCA cables are plugged into the input on the source
instead of the output.
•
A fault in the source providing audio input.
•
A fault in the speaker wire and/or its connections,
either at the Speaker Block Connector at the back of
the amplifier or at the speaker location in the zone.
•
A fault in the speaker in the remote zone.
•
The DIP switches for the audio input selection are set
incorrectly.
•
Volume controls are all the way OFF.
•
An internal fault has occurred in the amplifier.
If one of the internal amplifiers does not provide audio
output to the speakers and the protection LEDs on the
front panel are not illuminated, proceed to step 1 below.
If the protection LEDs are illuminated, proceed to step 6
below.
IMPORTANT: BEFORE DISCONNECTING OR RECONNECTING
AUDIO CABLES OR SPEAKER CONNECTIONS, TURN
THEAMPLIFIER OFF. ONCE THE CONNECTIONS ARE REMADE,
THEN TURN THE AMP BACK ON. MAKING OR BREAKING LINE-
LEVEL RCA CONNECTIONS WITH THE AMPLIFIER POWERED
ON CAN DAMAGE THE AMPLIFIER AND/OR THE SPEAKERS.
Steps to Resolve
1. Check the line-level RCA interconnect cable and
its connections from the source into the amplifier.
Make sure the RCA plugs are pushed all the way into
the jacks. Hum can result if the RCA male plug is
only partially inserted in the RCA jacks. If the cable is
‘open’ (bad RCA connector or cable), then replacing
the cable should restore functionality. Use a new
cable or temporarily use one of the RCA cables from
another zone on the amplifier. If there is still no
sound, proceed to step 2.
2. Try the output of another source into the non-
TROUBLESHOOTING: NO BASS AND
‘HOLLOW-SOUNDING’ VOICES FROM
A PAIR OF SPEAKERS OR A SINGLE
STEREO SPEAKER
Potential Reasons
•
The most common reason is one speaker pairs is
wired in reverse polarity. There are four speaker wire
connections on each pair of channels. Left channel
positive, left channel negative, right channel positive
and right channel negative. Using color coded four
conductor wire simplifies the connections at both
the amplifier and speakers. Typically, right channel
positive uses the red conductor, right channel
negative uses the black conductor, left channel
positive uses the white conductor and left channel
negative uses the green (or blue) conductor. If one
functioning amplifier. For example, if using the
outputs of a second zone of an AV receiver, try the
zone 3 output or the variable output of a music
server, portable music player or satellite tuner.
3. Examine the speaker wires inserted into the Speaker
Block Connector. Are all the wires securely inserted
into the connector without breaks, the wires being
loose or strands touching? Re-secure any suspect
wires, plug the connector back into the amp, turn the
amp back on and check for output. If still no output,
proceed to the next step.
4. Unplug the Speaker Block Connector. Disconnect
the current speaker wires from the block connector.
Using a short run of speaker wire, connect a local
test speaker into the block connector. Plug the
block connect back into the amp, turn the amp
back on and test for audio output. If the test speaker
is now producing audio, then there could be an
‘open circuit’ at the remote zone speakers, meaning
one of the connections has been compromised.
An alternative is to disconnect the Speaker Block
Connector from a known working zone and plug it
into the non-working zone. Does the amplifier now
produce sound? If yes, then the wiring between the
amp and the speakers may have been compromised.
If no, then the non-functioning amplifier may have
an internal fault that for whatever reason is not
lighting the protection LEDs. Please contact Sonance
Technical Support to initiate an RMA.
5. Check the position of the source select switch.
6. If the front panel zone LEDs are illuminated red,
disconnect the Speaker Output Block Connector.
If the protection LEDs remain on with the Block
connector unplugged, then the amplifier may have
an internal fault. There is no reset procedure. The
amplifier will need to be returned to Sonance on an
RMA (see warranty section). If the LEDs go out when
the block connector is unplugged, then try step 4
above. Is the amplifier now functioning properly? If
yes, then there could be a short in the speaker wires
leading to the remote zone or the speakers have
become shorted/damaged from excessive power.
