Troubleshooting - NAD M2 Owner's Manual

REFERENCE

troubleShooting

condition
The VFD displays
"PROTECTION
LEFT AMP SHORT".
The VFD displays
"PROTECTION
RIGHT AMP SHORT".
The VFD displays
"PROTECTION
LEFT AND RIGHT SHORT".
The VFD displays
"PROTECTION
LEFT CHANNEL ERROR".
The VFD displays
"PROTECTION
RIGHT CHANNEL ERROR".
The VFD displays
"PROTECTION
LEFT AND RIGHT ERROR".
The VFD displays
"MAIN POWER ERROR".
The VFD displays
"START UP ERROR
POWER OFF".
The VFD displays
"OVERHEAT".
No power.
M2 always at standby mode; cannot
be switched ON using the front
panel STANDBY button or remote
control.
No sound.
No sound one channel.
M2 does not respond to remote
control commands.
12
poSSible cauSeS
• Left output short circuit.
• Right output short circuit.
• Left and right output short circuit.
• Left channel internal error.
• Right channel internal error.
• Left and right channel internal error.
• Error with the internal power supply.
• Internal initialization error when powered on.
• The M2 is too hot due to insufficient ventilation.
• The power cord is disconnected.
• POWER switch shut down.
• OFF/AUTO TRIGGER switch set to "AUTO" position.
• Power AC lead unplugged or power not switched ON.
• The selected source input has no applied input signal
at the corresponding rear panel input socket.
• Volume control set to minimum level.
• "LOOP" feature is enabled and a connection in "loop"
setup is "broken" (i.e., no connection to OPTICAL OUT,
not looped to "OPTICAL LOOP IN", etc).
• Speaker not properly connected or damaged.
• Input lead disconnected or damaged.
• The remote control batteries are dead.
• Batteries incorrectly inserted.
• IR transmitter window on the remote control or IR
receiver window on the front panel is obstructed.
• M2 front panel is in very bright sunlight or ambient
light.
poSSible SolutionS
• Shut down M2 by turning off the rear
panel POWER switch. If there is no action
undertaken, the M2 will shut down itself (go
to standby mode) within 10 seconds the fault
happened.
• Check for any short circuit at the left and/or
right channel output or LEFT and/or RIGHT
speakers before restarting the M2 again.
• Shut down M2 by turning off the rear
panel POWER switch. If there is no action
undertaken, the M2 will shut down itself (go
to standby mode) within 10 seconds the fault
happened.
• Restart again the M2 by switching ON the
rear panel POWER switch (if you have shut
down the M2 via the POWER switch) and then
pressing the front panel STANDBY button or
remote control's [ON] button.
• Shut down M2 by turning off the rear panel
POWER switch. Ensure that there is adequate
space below, above and to the sides of the
M2 to allow proper air flow. After the M2
has cooled down normal operation will be
restored.
• Plug the power cord into the wall outlet
securely.
• Set the POWER switch to ON position.
• Slide the OFF/AUTO TRIGGER to "OFF"
position.
• Check if AC lead is plugged-in and POWER
switched ON.
• Check that there is active input signal applied
at the corresponding rear panel input socket.
• Turn Volume control up to audible level.
• Check your "loop" connection setup.
• Press "loop" button again to deactivate or turn
off the "loop" feature ("LOOP" is extinguished
in the VFD) thus returning to normal audio
listening of a selected source input.
• Check connections and speakers.
• Check leads and connections.
• Replace the remote control batteries.
• Follow correct battery insertion setup.
• Check IR windows and ensure clear line-of-
sight from remote control to M2.
• Reduce sunlight/room lighting.