Yamaha RX-V440RDS owner manual page

TROUBLESHOOTING

Problem	Cause	Remedy	Refer to
			page
No sound from the rear	“SOUND 1C REAR LR” or “SOUND 1D	Select LRG or SML.	42
center speaker.	REAR CT” on the set menu is set to NON.
	The Dolby Digital EX or the DTS-ES	Press 6.1/5.1 on the remote control to switch the	–
	decoder is not switched on.	decoder on.
A “humming” sound can	Incorrect cable connections.	Firmly connect the audio plugs. If the problem	–
be heard.		persists, the cables may be defective.
The volume level cannot	The component connected to the OUT	Turn on the power to the component.	–
be increased, or the	(REC) jacks of this unit is turned off.
sound is distorted.
The sound effect cannot	It is not possible to record the sound effect		–
be recorded.	with a recording component.
The sound field	“OPTION 2 MEM. GUARD” in the set	Set “OPTION 2 MEM. GUARD” in the set menu	–
parameters and some	menu is set to ON.	to OFF.
other settings on the
unit cannot be changed.
The unit does not	The internal microcomputer has been	Disconnect the AC power cord from the outlet	–
operate properly.	frozen by an external electric shock (such	and then plug it in again after about 30 seconds.
	as lightning or excessive static electricity)
	or by a power supply with low voltage.
“CHECK SP WIRES”	The speaker cables are short circuited.	Make sure all speaker cables are connected	–
appears on the front		correctly.
panel display.
There is noise interfer-	This unit is too close to the digital or high-	Move this unit further away from such	–
ence from digital or	frequency equipment.	equipment.
high-frequency
equipment, or this unit.
The unit suddenly turns	The internal temperature has become too	Wait until the unit cools down and then turn it	–
into standby mode.	high and the overheat protection circuitry	back on.
	has been activated.

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