M3i manual issue 1 Page 11 of 13
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.
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 M3i, as this will invalidate the guarantee.
(11 pages)
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