NAD L 73 owner manual Troubleshooting

				Reference
				TROUBLESHOOTING
CONDITION		POSSIBLE CAUSE(S)		POSSIBLE SOLUTIONS(S)
NO SOUND FROM ALL CHANNELS	•	AC power unplugged	•	Check AC cable, connection, and outlet
	•	Power not switched on	•	Disengage Tape Monitor
	•	Outlet is unpowered
	• Tape Monitor is engaged
NO SOUND FROM SOME CHANNELS	•	Faulty/missing cables;	•	Check cables
	•	<SPEAKER CONFIGURATION> channel(s) set to	•	Check <SPEAKER CONFIGURATION> menu
		“None”	•	Check power amp, cabling, and speakers
	• Power-amp or speaker-connections faulty
NO SOUND FROM SURROUND CHANNELS	•	No SURROUND MODE is engaged	•	Select appropriate SURROUND MODE
	•	Surround-channels set to “None” on <SPEAKER	•	Correct <SPEAKER CONFIGURATION> or <LEVEL
		CONFIGURATION> menu		TRIM> settings
	• Surround-channels level set too low on <LEVEL
		TRIM> menu
NO SOUND FROM SUBWOOFER	•	Subwoofer is off, unpowered, or improperly	•	Power-up subwoofer, check sub’s AC outlet, or
		connected		check connections
	•	Subwoofer set to “OFF” on <SPEAKER	•	Correct <SPEAKER CONFIGURATION> or <Levels
		CONFIGURATION> menu		setup> settings
	• Sub level set too low on <LEVEL TRIM> menu
NO SOUND FROM CENTRE CHANNEL	•	Source is a 2/0 (etc.) Dolby Digital or DTS	•	Play a known 5.1-channel recording or select
		recording without centre channel		Dolby Pro Logic or Mono mode
	•	Centre set to “OFF” on <SPEAKER	•	Correct <SPEAKER CONFIGURATION> or <LEVEL
		CONFIGURATION> menu		TRIM> settings
	• Centre level set too low on <LEVEL TRIM> menu
NO DOLBY DIGITAL/DTS	•	Source’s digital output is not connected to a L73	•	Check connections; check source component
		digital input; source component not configured		setup
		for multichannel digital output
L73 DOES NOT RESPOND TO HTR L73	•	Batteries are flat or incorrectly inserted	•	Check batteries
REMOTE	•	IR transmitter window on remote, or IR receiver	•	Check IR windows and ensure clear line-of-sight
		window on L73 is obstructed		from remote to L73
	•	L73 front panel is in very bright sunlight or	•	Reduce sunlight/room lighting
		ambient light
L73 DOES NOT RESPOND TO FRONT-	•	Microprocessor error	•	Power-down the L73 via the front-panel Power
PANEL COMMANDS	•	L73 may have over-heated	•	key and unplug it from the AC outlet
				Wait five minutes, re-connect and power up
THE POWER IS ON, BUT THE DVD PLAYER	•	No disc is inserted.	•	Insert a disc (Check that the DVD or, audio CD
DOES NOT WORK				indicator in the display is lit)
NO PICTURE	•	The TV is not set to receive DVD signal	•	Select the appropriate video input mode on the
	• The video cable is not connected securely			TV so that the picture from the DVD player
	• The connected TV power is turned off			appears on the TV screen output.
			•	Connect the video cable into the jacks securely.
			•	Power on the TV
NO SOUND	•	The Digital Audio Output is set to the wrong	•	Set the Digital Audio Output to the correct
		position		position
THE PLAYBACK PICTURE IS POOR	•	The disc is dirty	•	Clean the disc
THE DVD PLAYER DOES NOT START	•	No disc is inserted	•	Insert a disc (Check that the DVD, or audio CD
PLAYBACK	•	An unplayable disc is inserted	•	indicator in the DVD display is lit)
	•	The disc is placed upside down.		Insert a playable disc (Check the disc type colour
	• The disc is not placed within the guide			system and Regional code)
	•	A menu is on the TV screen	•	Place the disc with the playback side down
	•	The disc is dirty	•	Place the disc on the disc tray correctly inside the
				guide
			•	Press SETUP to turn off the menu screen
			•	Clean the disc
PARENTAL CONTROL CANNOT BE	•	The password entered was wrong.	•	Enter the correct password.
CHANGED	•	Password was forgotten.	•	Set the L73 to factory default settings.
			1)	Place the L73 into FM mode.
			2)	Press quickly the three front panel buttons;
				“PLAY/PAUSE” then “STOP” then
				“DISPLAY’, holding the “DISPLAY” button for
				more than 7 seconds. The L73 will switch itself
				off then back on to DVD mode.

NOTE

Default password is 1234.

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