Troubleshooting - NAD M3 - MANUAL 2 Owner's Manual

Problem
NO SOUND
NO SOUND ONE CHANNEL
WEAK BASS /
DIFFUSE OR NO STEREO IMAGE
REMOTE CONTROL HANDSET NOT WORKING
POWER/PROTECTION LED STAYS RED UPON
TURNING POWER ON
POWER/PROTECTION INDICATOR TURNS RED
DURING OPERATION
Cause
• Power AC lead unplugged or power not
switched on
• Incorrect Mode selected
• Mute on
• Rear Pre-out/Main-in amp links not fitted
• No speakers selected
• Balance control not centred
• Speaker not properly connected
or damaged.
• Input lead disconnected or damaged
• Mode selected to Left or Right or Mono channel
• Speakers wired out of phase
• Biamp mode selected with high pass filter
• Mode set to Left or Right or Mono channel
• Batteries flat, or incorrectly inserted
• IR transmitter or receiver windows obstructed
• IR receiver in direct sun or very bright ambient
light
• ZR3 remote used with M3 in Standby.
• Loudspeakers cabling has a short-circuit
• Amplifier has over-heated.
• Overall impedance of loudspeakers too low
Reference

TROUBLESHOOTING

Solution
• Check if AC lead is plugged in and power
switched on
• Select Stereo Mode
• Switch off Mute
• Fit links
• Select the appropriate speakers (A / B)
• Centre Balance control
• Check connections and speakers
• Check leads and connections
• Select Stereo Mode
• Check connections to all speakers in the system
• Set biamp to FULL RANGE
• Select Stereo Mode
• Check or replace batteries
• Remove obstruction
• Place unit away from direct sun, reduce amount
of ambient light
• Turn on M3. M3 must be in ON to use ZR3.
• Turn amplifier off and check loudspeaker cable
connections for both speakers at amplifier's back
panel and loudspeakers. Turn amplifier on.
• Turn amplifier off. Make sure ventilation slots on
top and bottom of amplifier aren't blocked. After
amplifier has cooled down, turn back on.
• Ensure the overall loudspeaker impedance isn't
below 4 ohms.
• Check loudspeaker cables for short circuits
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