Reference; Troubleshooting - NAD T755 Owner's Manual

Av surround sound receiver
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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 755 does not respond to
HTR  remote.
T 755 does not respond to
front panel commands or
remote control.
NOTES
• Factory defaults for North American (AH) version : Press simultaneously [Source ]+ [Front Input/MP]
• Factory defaults for European (C) version: Press simultaneously [ Source ]+[ Front Input/MP]
• Audyssey Setup settings along with other stored presets and settings will all be deleted upon restoring your T 755 to its factory defaults.
40
POSSIBLE CAUSES
AC power unplugged.
Power not switched on.
Outlet has no power.
Speaker A (or Speaker B) is not activated.
Faulty/missing cables.
"Speaker Configuration" channel (s) set to "OFF".
Power-amp or speaker-connections faulty.
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 755 digital
input.
Source component not configured for multichannel digital
output.
Batteries are flat or incorrectly inserted.
IR transmitter window on remote or IR Receiver window on
T 755 is obstructed.
T 755 front panel is in very bright sunlight or ambient light.
Microprocessor error.
T 755 may have over heated.
12V TRIGGER IN/OUT is set to AUTO position.
POSSIBLE SOLUTIONS
Check AC cable connection and outlet
Activate Speaker A (or Speaker B) by pressing
the corresponding front panel.
Check cables.
Check "Speaker Configuration" menu.
Check power amp, cabling, and speakers.
Select appropriate listening mode.
Correct "Speaker 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 755.
Reduce sunlight/room lighting.
Power-down the T 755 via the rear panel
Power switch and unplug it from the AC
outlet.
Wait five minutes, re-connect and power up.
Switch to 12V TRIGGER IN/OUT OFF position.

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