Reference; Troubleshooting - NAD T747 Owner's Manual

REFERENCE

TROUBLESHOOTING

CONDITION
No sound from all channels.
No sound from some channels.
No sound from surround channels.
No sound from Subwoofer.
No sound from Center channel.
No Dolby Digital/ DTS.
T 747 does not respond to AVR  remote
control commands.
NOTE
Restoring your T 747 to its factory defaults: At FM mode, press and hold front panel's LISTENING MODE button until the VFD shows "Factory Reset".
40
POSSIBLE CAUSES
• AC power unplugged.
• Power not switched on.
• Outlet has no power.
• Faulty/missing cables.
• "Speaker Configuration" channel (s) set to
"Off".
• No surround listening mode is engaged.
• Surround-channels set to "Off" on "Speaker
Configuration" menu.
• Surround-channels level set too low on
"Speaker Levels" menu.
• Subwoofer is off, not powered or improperly
connected.
• Subwoofer set to "Off" on "Speaker
Configuration" menu.
• Sub level set too low on "Speaker Levels"
menu.
• Source is a 2/0 (etc.).
• Dolby Digital or DTS recording without center
channel; Center set to "Off" on "Speaker
Configuration" menu.
• Center level set too low on "Speaker Levels"
menu.
• Source's digital output is not connected to a
T 747 digital input.
• Source component not configured for
multichannel digital output.
• Batteries are flat or incorrectly inserted.
• IR transmitter window on remote or IR A/V
Receiver window on T 747 is obstructed.
• T 747 front panel is in very bright sunlight or
ambient light.
POSSIBLE SOLUTIONS
• Check AC cable connection and outlet.
• Check cables.
• Check "Speaker Configuration" menu.
• Select appropriate listening mode.
• Correct "Speakers Configuration" or "Speaker
Levels" settings.
• Power-up subwoofer, check Sub's AC outlet
or check connections.
• Correct "Speaker Configuration" or "Speaker
Levels" settings.
• Play a known 5.1-channel recording or select
Dolby Pro Logic IIx Music mode.
• Correct "Speaker Configuration" or "Speaker
Levels" settings.
• Check connections.
• Check source component setup.
• Check batteries.
• Check IR windows and ensure clear line-of-
sight from remote to T 747.
• Reduce sunlight/room lighting.