PROBLEMS?
Issue 2
Page 11 of
13
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
Mains power supply is not fully inserted
into mains socket
Mains power supply lead is not fully
inserted into rear socket
Plug in securely
No sound
Wrong connections between input
sources and the unit.
Check audio input lead
connections
Check mono/stereo switch is in
correct position.
Sound is not precise, lacking in
bass and stereo image
Speaker wiring wrong way round at
speaker or amplifier end
Check wiring polarity at both ends
of speaker cables
Check mono/stereo switch is in
correct position.
Intermittent Flashing Orange
LED
Clipping is about to occur
Normal at higher listening levels
and/or with less sensitive
speakers. Turn volume down a bit.
RED LED lit or flashing
Unit has overheated
Overload on output
Excessive temperature rise
Switch off and check speaker
wiring. If this happens often, check
speakers and consider using unit
in mono mode (in conjunction with
a second M1 PWR unit, in a stereo
setup). See P.8
Allow the M1 PWR approx. 10
minutes to cool down properly
before switching on again.
RED LED lit and Orange LED
flashing steadily
Unit has cut out.
Overload on output
Excessive temperature rise
Switch off and check speaker
wiring. If this happens often, check
speakers and consider using unit
in mono mode (in conjunction with
a second M1 PWR unit, in a stereo
setup). See P.8
Allow the M1 PWR approx. 30
minutes to cool down properly
before switching on again.
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 screen
directly connected both ends.
No audio output, or too low
level output
Incorrect or missing connections
Check connections and make sure
they are secure.
If none of these actions affect a cure, please contact the dealer, or an authorised Musical Fidelity service agent.
Never open the case of the unit, as this will invalidate the guarantee.
