Issue 4
Page 12 of
14
PROBLEMS?
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.
No audio output from USB
input
USB Cable not connected
USB Driver not selected (PC or MAC)
Check connections and make sure they are secure.
See P.9
PC users
or
Mac users
section
Not detected when
connected to USB
USB Cable faulty
USB not working/enabled on computer
Correct USB drivers not installed
(can happen particularly with factory-
preinstalled Windows operating systems)
Check and replace cable
Check USB port functions with another device.
Please check with the computer manufacturer. Enquire
about USB driver or update.
Dropouts in sound (USB
input)
Shared USB port with another device
Computer busy with another application
Computer low on resources
Avoid sharing the USB port with other devices, if
possible.
At times an application (program) may intervene,
sometimes invisibly e.g. a virus scanner. When this
happens, computer resources are temporarily used up,
and playback may falter. This is not a fault. Try running
fewer applications if possible.
Remote control does not
work.
Amplifier’s
POWER
switch is set to 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.
Set switch to 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 M6i, as this will invalidate the guarantee.
