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Basic problem-solving with an amplifier is similar to troubleshooting other electrical or electronic equipment.
Always check the most obvious possible causes first, such as the following examples:
Problem Probable Cause Remedy
No power when
POWER button is
pressed.
Mains power plug is not fully inserted
into rear socket.
Plug in securely.
No sound Mute function is still active.
Wrong connections between input
sources and the unit
Speakers not connected, or
incorrectly wired
Press the MUTE button on the remote control to
cancel.
Check audio input lead connections.
Check speaker cables.
Sound cut Loose connection
Output overload or short circuit
Check speaker and input connections.
Switch unit off. Check speaker connections for
shorting strands or wires. When all has been
double-checked reduce volume and switch unit
back on.
N.B. Take great care when bi-wiring or bi-
amping that speaker bass and treble linking
straps are removed; see speaker manual for
more information.
Sound is not
precise, lacking in
bass and stereo
image.
Speakers are connected out of
phase, i.e., connections to one
speaker
(+ and –) are reversed.
Ensure speakers are connected with same
polarity at amplifier and speaker ends.
Hum. Audio connector plug not fully
pushed in
Cable Fault
Unsuitable cable
(e.g. cable grounds not connected)
Insert plug securely.
Check cable is connected at both ends.
N.B. Some esoteric cables have internal wiring
intentionally disconnected/modified. For best
results on all inputs analogue AND digital,
please use good quality screened coax; signal
and screens both separately connected at both
ends.
No audio output, or
too low level output.
Incorrect or missing connections
Check connections and make sure they are
secure.
Remote control
does not work.
Amplifier’s POWER off.
One or more batteries fitted the
wrong way round.
Batteries are flat.
Remote control is not pointed directly
towards the front panel of the
amplifier.
Interference from another source.
Switch on.
Insert batteries correctly.
Change batteries for a new set.
Ensure there is no obstruction between the
remote control and amplifier front.
Lighting such as fluorescent, incandescent, or
even sunlight contains large amounts of infra-
red radiation. Ensure such sources are not
shining directly on the infra-red window as this
could swamp the signal from the remote control.
Also check the system and any other nearby
remotes for stuck buttons.
Remote control
range has greatly
reduced
Batteries are running out Change batteries for a new set.
If none of these actions affect a cure, please contact the dealer, or an authorised Musical Fidelity service agent.
Remember; never open the case of the Nu-Vista 800, as this will invalidate the guarantee.
PROBLEMS?
12


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