Troubleshooting - NAD M28 Owner's Manual

REFERENCE

TROUBLESHOOTING

CONDITION
No power.
M28 always at standby mode; cannot be
switched ON using the o (Standby) button.
No sound.
No sound one channel.
There is no BALANCED audio output.
There is no SINGLE-ENDED audio output.
8
POSSIBLE CAUSES
• Mains power cord unplugged from mains
power source or from M28's AC mains input.
• Power switch is off.
• M28 at standby mode.
• A mono plug is plugged-in at the +12V
TRIGGER IN port of the rear panel.
• No input signal applied through the analog
audio input ports.
• External source volume control is set to
minimum level.
• Speaker not properly connected or damaged.
• Input lead disconnected or damaged.
• SELECT switch is set to SINGLE-ENDED.
• SELECT switch is set to BALANCED.
POSSIBLE SOLUTIONS
• Connect the mains power cord to M28's
AC mains input and then plug into a mains
power source.
• Switch ON the Power switch.
• Press o (Standby) button to switch ON the
M28 from standby mode.
• Unplug the mono plug.
• Check that there is active input signal applied
through the analog audio input ports.
• Turn up external source's volume control until
audio is heard.
• Check connections and speakers.
• Check leads and connections.
• Set SELECT switch to BALANCED.
• Set SELECT switch to SINGLE-ENDED.