Reference; Troubleshooting - NAD T 748 Owner's Manual

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 748 does not respond to remote
control commands.
No RDS information.
Display shows "No Service List".
POSSIBLE CAUSES
• AC power unplugged.
• Power not switched on.
• Outlet has no power.
• Mute function is activated.
• 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.
• Subwoofer 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 748 digital input.
• Source component not configured for
multichannel digital output.
• Batteries are flat or incorrectly inserted.
• Infrared receiver (IR) window of T 748 or IR
transmitter of the remote control is obstructed.
• T 748 front panel is in very bright sunlight or
ambient light.
• Station signal too weak.
• Station not transmitting RDS data.
• DAB antenna not connected properly.
• No DAB coverage in the area.

REFERENCE

TROUBLESHOOTING

POSSIBLE SOLUTIONS
• Check AC cable connection and outlet.
• Toggle [MUTE] button to deactivate Mute
function.
• Check cables.
• Check "Speaker Configuration" menu.
• Select appropriate listening mode.
• Correct "Speaker Configuration" or "Speaker
Levels" settings.
• Power up subwoofer, check subwoofer'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 748.
• Reduce sunlight/room lighting.
• Check station tuning. Adjust or replace antenna.
• Tune to an RDS station that supports program-
service name (PS mode) and radio-text mode
(RT).
• Check the connection and position of DAB
antenna.
• Call your local DAB broadcast providers for
coverage information.
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