Troubleshooting – NAD T 743 User Manual

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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 743 DOES NOT RESPOND
TO HTR 2 REMOTE

T 743 DOES NOT RESPOND
TO FRONT-PANEL COMMANDS
OR REMOTE CONTROL

POSSIBLE CAUSE(S)

• AC power unplugged
• Power not switched on
• Outlet is unpowered

• Faulty/missing cables
• channel (s) set to "None"
• Power-amp or speaker-connections faulty

• No surround listening mode is engaged
• Surround-channels set to "None" on

• Surround-channels level set too low on

• Subwoofer is off, unpowered,

or improperly connected

• Subwoofer set to "OFF" on

• Sub level set too low on

• Source is a 2/0 (etc.) Dolby Digital or

DTS recording without center channel;

• Center set to "OFF" on

• Center level set too low on

• Source's digital output is not connected to

a T 743 digital input

• Batteries are flat or incorrectly inserted
• IR transmitter window on remote, or

IR receiver window on T 743 is obstructed

• T 743 front panel is in very bright sunlight

or ambient light

• Microprocessor error
• T 743 may have over heated

• 12V TRIGGER IN/OUT is set to AUTO or

in position

POSSIBLE SOLUTIONS(S)

• Check AC cable, connection, and outlet

• Check cables
• Check menu
• Check power amp, cabling, and speakers

• Select appropriate listening mode
• Correct or

settings

• Power-up subwoofer, check sub's

AC outlet, or check connections

• Correct or

settings

• Play a known 5.1-channel recording or

select Dolby Pro Logic or Mono mode

• Correct or

settings

• Check connections
• Check source component setup

• Check batteries
• Check IR windows and ensure clear

line-of-sight from remote to T 743

• Reduce sunlight/room lighting

• Power-down the T 743 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