NAD T744 - Manual (Page 30)

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TROUBLESHOOTING
CONDITION CONDITION CONDITION CONDITION 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 744 DOES NOT RESPOND
TO HTR 2 REMOTE
T 744 DOES NOT RESPOND
TO FRONT-PANEL COMMANDS
OR REMOTE CONTROL
POSSIBLE CAUSE(S) POSSIBLE CAUSE(S) POSSIBLE CAUSE(S) POSSIBLE CAUSE(S) POSSIBLE CAUSE(S)
• AC power unplugged
• Power not switched on
• Outlet is unpowered
• Faulty/missing cables
• <Speaker Settings> channel (s) set to "None"
• Power-amp or speaker-connections faulty
• No surround listening mode is engaged
• Surround-channels set to "None" on
<Speaker Settings> menu
• Surround-channels level set too low on
<Channel Levels> menu
• Subwoofer is off, unpowered,
or improperly connected
• Subwoofer set to "OFF" on
<Speaker Settings> menu
• Sub level set too low on
<Channel Levels> menu
• Source is a 2/0 (etc.) Dolby Digital or
DTS recording without center channel;
• Center set to "OFF" on
<Speaker Settings> menu
• Center level set too low on
<Channel Levels> menu
• Source's digital output is not connected to
a T 74 4 digital input
• Batteries are flat or incorrectly inserted
• IR transmitter window on remote, or
IR receiver window on T 74 4 is obstructed
• T 74 4 front panel is in very bright sunlight
or ambient light
• Microprocessor error
• T 74
4 may have over heated
• 12V TRIGGER IN/OUT is set to AUTO or
in position
POSSIBLE SOLUTIONS(S) POSSIBLE SOLUTIONS(S) POSSIBLE SOLUTIONS(S) POSSIBLE SOLUTIONS(S) POSSIBLE SOLUTIONS(S)
• Check AC cable, connection, and outlet
• Check cables
• Check <Speaker Settings> menu
• Check power amp, cabling, and speakers
• Select appropriate listening mode
• Correct <Speakers Settings> or
<Channel Levels> settings
• Power-up subwoofer, check sub's
AC outlet, or check connections
• Correct <Speakers Settings> or
<Levels setup> settings
• Play a known 5.1-channel recording or
select Dolby Pro Logic or Mono mode
• Correct <Speakers Settings> or
<Channel Levels> settings
• Check connections
• Check source component setup
• Check batteries
• Check IR windows and ensure clear
line-of-sight from remote to T 74 4
• Reduce sunlight/room lighting
• Power-down the T 74 4 via the front-panel
Power button and unplug it from the AC
outlet
• Wait five minutes, re-connect and
power up
• Switch to OFF position